installation with optional field-installed electric heat and a ... the blower on heating speed (refer to unit wiring diagram).
lennox air handler model numbers handler is one component of a split heating and cooling system. CBX27UH 1.5-5 TON UPFLOW/HORIZONTAL AIR HANDLERS … Dave Lennox Signature Collection. Display in Celsius but it also works for Fahrenheit Air conditioner.
Technical | Commercial HVAC Tech Support | Lennox Commercial
Service Literature UNIT INFORMATION Corp. 1705-L7 March 6, 2020 CBA25UH (HFC- 410A) SERIES UNITS CBA25UH WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a licensed professional HVAC installer or equivalent, service agency, or the gas supplier. IMPORTANT The Clean Air Act of 1990 bans the intentional venting of refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992. Approved methods of recovery, recycling or reclaiming must be followed. Fines and/or incarceration may be levied for noncompliance. NOTICE A thermostat is not included and must be ordered separately. · A Lennox communicating thermostat must be used in communicating applications. · In non-communicating applications, the Lennox ComfortSense® thermostat may be used, as well as other non-communicating thermostats. In all cases, setup is critical to ensure proper system operation. Field wiring for both communicating and noncommunicating applications is illustrated in diagrams, which begin on page 29. CAUTION As with any mechanical equipment, contact with sharp sheet metal edges can result in personal injury. Take care while handling this equipment and wear gloves and protective clothing. Table of Contents CBA25UH Unit Dimensions Upflow inches (mm)......2 Specifications and Electrical Data...................................3 Model Number Identification............................................4 Blower Data.....................................................................5 Unit Components.............................................................7 ECBA25 Electric Heat Data.............................................9 Heat Section Installation................................................14 Configuration Modification ............................................16 Brazing Connections ....................................................19 Installing the Condensate Drain ...................................22 Electrical Connections ..................................................24 Inspecting and Replacing Filters ..................................25 Wiring Diagrams............................................................26 Professional Maintenance ............................................30 Check-out Procedures ..................................................30 Sequence of Operation ................................................31 General Information This indoor unit with all-aluminum coil is designed for installation with optional field-installed electric heat and a matched outdoor unit that is charged with HFC-410A refrigerant. These units, designed for indoor installation in multiple positions, are completely assembled for upflow and horizontal right-hand discharge before being shipped from the factory. All CBA25UH air handlers are equipped with a factory-installed, internally mounted check / expansion valve, which is suitable for use in HFC-410A applications. This air handler is compatible with the ComfortSense® non-communicating thermostat and non-communicating outdoor units. In addition, this unit has the enhanced capability of communicating with communicating thermostats and communicating outdoor units using the Lennox RSBus protocols. NOTE - For downflow or horizontal left-hand air discharge, certain field modifications are required. IMPORTANT: Special procedures are required for cleaning the all-aluminum coil in this unit. See page 29 in this instruction for information. Page 1 CBA25UH Unit Dimensions Upflow inches (mm) 1 (25) 1 (25) SUPPLY AIR OPENING 14-1/2 (368) C LINE VOLTAGE INLETS (Top and Left Side) 3/4 (19) TOP VIEW B 1 (25) LOW VOLTAGE INLETS (Top and Right Side) DETAIL OF PIPING PLATE 3/4 (19) SUCTION LINE LIQUID LINE 2-3/8 (60) 4-3/8 (111) 2-3/4 (70) 1-3/4 (44) 4-3/4 (121) CONDENSATE DRAINS (2) (Horizontal) CONDENSATE DRAINS (2) (Upflow and Downflow) 3-1/2 (89) LINE VOLTAGE INLETS (Top and Right Side) 22 (559) CIRCUIT BREAKER COVER LOW VOLTAGE INLETS (Either Side) AIR FLOW A 1-1/8 (29) PIPING PLATE D OPENING FRONT VIEW CONDENSATE DRAIN PIPING PLATE (3) (2-1/4 x 3-3/4) FILTER ACCESS SUCTION LINE LIQUID LINE 1-1/8 1/2 (29) (13) 20-3/8 (518) OPENING SIDE VIEW 1-1/8 (29) Dimensions A B C D 018 in. mm 43-1/2 1105 18-1/2 470 16-1/2 419 16-1/4 413 024 in. mm 45-1/2 1156 18-1/2 470 16-1/2 419 16-1/4 413 030 in. mm 47 1194 18-1/2 470 16-1/2 419 16-1/4 413 036, 042 in. mm 53-5/8 1362 21-1/2 546 19-1/2 495 19-1/4 489 048 in. mm 55 1397 21-1/2 546 19-1/2 495 19-1/4 489 060 in. mm 59-3/4 1518 21-1/2 546 19-1/2 495 19-1/4 489 NOTE - Unit is shipped configured for horizontal right-hand air discharge. Unit may be converted to horizontal left-hand air discharge by repositioning horizontal drain pan. Dimensions remain the same in all configurations. Page 2 Specifications and Electrical Data General Data Model Number Nominal tonnage Connections Suction/Vapor line (o.d.) - in. sweat Liquid line (o.d.) - in. sweat Condensate - in. fpt Indoor Coil Net face area - ft.2 Tube outside diameter - in. Number of rows Fins per inch Blower Wheel nominal diameter x width - in. Blower motor output - hp 1 Filters Shipping Data -1 package - lbs. ELECTRICAL DATA Voltage - 1 phase (60 hz) 2 Maximum overcurrent protection (unit only) 3 Minimum circuit ampacity (unit only) Blower Motor Full Load Amps CBA25UH-018 1.5 3/4 3/8 (2) 3/4 3.30 3/8 3 15 9 x 6 1/5 15 x 20 x 1 129 208/230V 15 5.0 1.1 CBA25UH-024 2 3/4 3/8 (2) 3/4 3.77 3/8 3 15 9 x 6 1/3 15 x 20 x 1 136 208/230V 15 5.0 1.6 CBA25UH-030 2.5 3/4 3/8 (2) 3/4 4.72 3/8 3 15 10 x 8 1/2 15 x 20 x 1 143 208/230V 15 5.0 2.2 CBA25UH-036 3 7/8 3/8 (2) 3/4 5.66 3/8 3 15 10 x 8 1/3 18 x 20 x 1 169 208/230V 15 5.0 2.0 SPECIFICATIONS General Data Model Number Nominal tonnage CBA25UH-042 3.5 CBA25UH-048 4 CBA25UH-060 5 Connections Suction/Vapor line (o.d.) - in. sweat 7/8 7/8 7/8 Liquid line (o.d.) - in. sweat 3/8 3/8 3/8 Condensate - in. fpt (2) 3/4 (2) 3/4 (2) 3/4 Indoor Coil Net face area - ft.2 5.66 6.13 7.08 Tube outside diameter - in. 3/8 3/8 3/8 Number of rows 3 3 3 Fins per inch 15 15 15 Blower Wheel nominal diameter x width - in. 10 x 8 12 x 10 12 x 10 Blower motor output - hp 1/2 1 1 1 Filters 18 x 20 x 1 18 x 20 x 1 18 x 20 x 1 Shipping Data -1 package - lbs. 169 179 190 ELECTRICAL DATA Voltage - 1 phase (60 hz) 208/230V 208/230V 208/230V 2 Maximum overcurrent protection (unit only) 15 15 15 3 Minimum circuit ampacity (unit only) 5.0 9.5 9.5 Blower Motor Full Load Amps 2.5 7.6 7.6 1 2 HACR type circuit breaker or fuse. 3 Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167°F. OPTIO N AL AC CESSORI ES - ORDER SE PA RATE LY Model -018 iComfort® M30 Smart Wi-Fi Thermostat Remote Outdoor Temperature Sensor Electric Heat - See Electric Heat Data Tables Horizontal Support Frame Kit Single-Point Power Source Control Box (for Electric Heat) High Performance Economizer (Commercial Only) 15Z69 X2658 Y9658 56J18 45K32 21H39 45K30 10U53 Page 3 -024 -030 -036 15Z69 15Z69 X2658 X2658 Y9658 Y9659 4 to 20 kW 56J18 56J18 45K32 45K32 21H39 21H39 45K30 45K30 10U53 10U53 -042 -048 -060 15Z69 X2658 Y9659 56J18 45K32 21H39 45K30 10U53 Model Number Identification CB A 25 UH -036 - 230 Unit Type CB = Air Handler Coil Type A = Aluminum Coil Series Configuration UH = Upflow/Horizontal Nominal Cooling Capacity 018 = 1.5 tons (5.3 kW) 024 = 2 tons (7 kW) 030 = 2.5 tons (8.8 kW) 036 = 3 tons (10.6 kW) 042 = 3.5 tons (12.3 kW) 048 = 4 tons (14.1 kW) 060 = 5 tons (17.6 kW) -01 Minor Revision Number Voltage 230 = 208/230V-60hz-1ph Air Flow Cooling Blower Speed The cooling blower speed is factory configured to provide correct air flow for an outdoor unit that matches the cooling capacity rating of the air handler. If the outdoor unit is smaller than the maximum cooling capacity rating for the air handler, the cooling blower speed may need to be changed. Refer to blower performance chart, table 2 on page 16 . WARNING Electric shock hazard! - Disconnect all power supplies before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. CHANGE BLOWER SPEED 1 - Disconnect all power supplies. 2 - Remove the air handler access panel. 3 - Locate pin number 2 on the blower relay. Two black wires are connected to this terminal pin. One connects to pin number 5 on the blower relay, one connects to an in-line splice connecting to a blue wire. 4 - Select the required blower motor speed. Connect red-LO or black-HI and plug it into the 4-pin blower relay harness connector. NOTE - Reuse the factory-installed wire nut on the unused wires. 5 - Replace all panels. 6 - Reconnect power. BLOWER RELAY NOTE - Refer to wiring diagram located on the unit ance (table 2). All air data measured external to unit with 1 inch non-pleated air filter in place. All factory settings are medium speed. All data given while air handler is operating with a dry DX coil. All downflow applications run on high speed when utilizing electric heat. 5 BLOWER RELAY HARNESS BLUE (MED) 2 4-PIN BLOWER CONNECTOR FIGURE 1. Changing Blower Speed PLASTIC CAPS RED (L0) BLACK (HI) YELLOW (COM) Page 4 Blower Data CBA25UH-018 PERFORMANCE External Static Pressure in. w.g. Air Volume / Watts at Various Blower Speeds High Medium Low cfm Watts cfm Watts cfm Watts 0.10 920 264 690 190 540 144 0.20 880 251 670 183 525 140 0.30 855 238 640 176 505 136 0.40 790 224 605 167 470 130 0.50 710 210 550 155 420 122 Electric heaters have no appreciable air resistance. CBA25UH-024 PERFORMANCE External Static Pressure in. w.g. Air Volume / Watts at Various Blower Speeds High Medium Low cfm Watts cfm Watts cfm Watts 0.10 1105 342 1010 280 675 210 0.20 1045 322 980 262 675 202 0.30 1000 307 940 247 655 192 0.40 915 284 805 235 630 180 0.50 855 268 740 216 590 170 Electric heaters have no appreciable air resistance. CBA25UH-030 PERFORMANCE External Static Pressure in. w.g. Air Volume / Watts at Various Blower Speeds High Medium Low cfm Watts cfm Watts cfm Watts 0.10 1310 496 1080 391 870 310 0.20 1260 466 1055 378 870 301 0.30 1215 449 1025 361 855 288 0.40 1155 431 985 343 810 278 0.50 1085 408 935 325 770 265 Electric heaters have no appreciable air resistance. CBA25UH-036 PERFORMANCE External Static Pressure in. w.g. Air Volume / Watts at Various Blower Speeds High Medium Low cfm Watts cfm Watts cfm Watts 0.10 1560 532 1275 402 1020 295 0.20 1520 518 1240 388 970 287 0.30 1445 502 1190 375 955 280 0.40 1395 480 1150 363 910 270 0.50 1325 460 1085 346 805 254 Electric heaters have no appreciable air resistance. Page 5 Blower Data CBA25UH-042 PERFORMANCE External Static Pressure in. w.g. Air Volume / Watts at Various Blower Speeds High Medium Low cfm Watts cfm Watts cfm Watts 0.10 1815 674 1525 498 1300 394 0.20 1755 652 1495 486 1275 387 0.30 1695 634 1450 473 1250 376 0.40 1605 607 1390 455 1210 367 0.50 1530 582 1345 441 1155 356 Electric heaters have no appreciable air resistance. CBA25UH-048 PERFORMANCE (Less Filter) External Static Pressure in. w.g. High cfm Watts Air Volume / Watts at Various Blower Speeds Medium-High Medium Medium-Low cfm Watts cfm Watts cfm Watts 0.10 1895 597 1770 493 1715 454 1500 315 0.20 1860 629 1735 510 1670 470 1465 331 0.30 1835 632 1700 529 1635 487 1435 348 0.40 1795 656 1670 544 1615 504 1400 364 0.50 1760 667 1650 552 1575 514 1360 379 Electric heaters have no appreciable air resistance. Low cfm Watts 1250 211 1210 222 1185 231 1130 239 1110 251 CBA25UH-060 PERFORMANCE (Less Filter) External Static Pressure in. w.g. High cfm Watts Air Volume / Watts at Various Blower Speeds Medium-High Medium Medium-Low cfm Watts cfm Watts cfm Watts 0.10 1980 624 1905 538 1815 484 1625 354 0.20 1955 644 1870 563 1785 493 1595 365 0.30 1925 643 1835 568 1760 507 1565 385 0.40 1895 663 1810 585 1730 527 1520 398 0.50 1860 673 1765 595 1685 542 1490 398 Electric heaters have no appreciable air resistance. Low cfm Watts 1100 132 1050 140 1000 144 925 162 830 172 Page 6 ELECTRIC HEAT CONTROL BOX BLOWER COMPARTMENT COIL EXPANSION VALVE UPFLOW DRAIN PAN FIGURE 2. Typical Unit Parts Arrangement Application All major blower coil components must be matched according to Lennox recommendations for the unit to be covered under warranty. Refer to the Product Specification bulletin for approved system matchups. A misapplied system will cause erratic operation and can result in early unit failure. The units come with factory installed check and expansion valve for all applications. The TXV valve has been installed internally for a cleaner installation and is accessible if required. Unit Components CONTROL BOX The CBA25UH control box is located above the blower section shown in figure 2. Line voltage and electric heat connections are made in the control box. Optional electric heat fits through an opening located in the center of the control box. When electric heat is not used, cover plates cover the opening. The electric heat control arrangement is detailed in the electric heat section of this manual. TRANSFORMER All CBA25UH series units use a single line voltage to 24VAC transformer mounted in the control box. The transformer supplies power to the control circuits in the indoor and outdoor unit. Transformers are rated at 40VA. 208/240VAC single phase transformers use two primary voltage taps as shown in figure 3. PRIMARY ORANGE 240 VOLTS RED 208 VOLTS SECONDARY BLUE BLACK YELLOW FIGURE 3. 208 / 240 Volt Transformer BLOWER RELAY All CBX25UH units use a double-pole single-throw (DPST) switch relay to energize the blower motor. The relay coil is energized by blower demand from indoor thermostat. When the coil is energized, a set of normally open (N.O.) contacts closes to energize the blower motor on cooling speed. When de-energized, a set of normally closed (N.C.) contacts allows the electric heat relay to energize the blower on heating speed (refer to unit wiring diagram). TIME DELAY RELAY Blower time delay operation: 1 - When cooling demand is initiated, there is a 1 second motor-on delay. 2 - After the motor-on delay expires, motor ramps up to 100% and runs at 100% until cooling demand is satisfied. 3 - Once demand is met, motor runs at 100% for 45 seconds. 4 - Motor ramps down to stop. 3 4 12 100% CFM 100% CFM OFF 1 SECOND DELAY COOLING DEMAND 45 SECS FIGURE 4. Blower Time Delay BLOWER MOTOR (B3) CBA25UH -018, -024, -030, -036 and -048 units use single-phase direct drive blower motors with a run capacitor. Figure 5 shows the parts arrangement. All motors have three speed taps. Typically, the MED speed tap is energized during normal operation. All units are factory wired for heat pump and cooling applications with or without electric heat. The unit wiring diagrams will provide factory set blower speeds. Page 7 BLOWER ASSEMBLY FIGURE 5. Blower Assembly BLOWER MOTOR CAPACITOR All CBA25UH -018, -024, -030 and -036 series units use single-phase direct drive motors with a run capacitor. The run capacitor is mounted on the blower housing. See figure 5. Capacitor ratings are shown on side of capacitor and indoor blower motor nameplate. COIL CBA25UH units have dual slab coils arranged in an A configuration. Each coil has two or three rows of aluminum tubes fitted with ripple-edged aluminum fins. An expansion valve feeds multiple parallel circuits through the coils. The coil is designed to easily slide out of the unit cabinet. PLASTIC DRAIN PANS Drain pans are provided and installed on the CBA25UH. The drain pans are made from fiberglass filled plastic. Page 8 ECBA25 Electric Heat Data ELECTRIC HEAT DATA Electric Heat Model Number Volt 4 kW ECBA25-4 (19V31) 208 Terminal Block 220 ECBA25-4CB (19V32) 30A Circuit Breaker 230 240 5 kW ECBA25-5 (16Y36) 208 Terminal Block 220 ECBA25-5CB (16Y39) 30A Circuit Breaker 230 240 7.5 kW ECBA25-7.5 (16Y37) 208 Terminal Block 220 ECBA25-7.5CB (16Y41) 45A Circuit Breaker 230 240 10 kW ECBA25-10 (16Y38) 208 Terminal Block 220 ECBA25-10CB (16Y42) 60A Circuit Breaker 230 240 Input kW 3.0 3.4 3.7 4.0 3.6 4.0 4.4 4.8 5.6 6.3 6.9 7.5 7.2 8.0 8.8 9.6 1 Btuh 10,250 11,450 12,550 13,650 12,300 13,800 15,000 16,400 19,200 21,500 23,500 25,600 24,600 27,500 30,000 32,700 CBA25UH-018 | SINGLE PHASE Blower Motor Full Load Amps 2 Minimum Circuit Ampacity 3 Maximum Overcurrent Protection 1.1 19 4 20 1.1 20 4 20 1.1 21 4 25 1.1 22 4 25 1.1 23 4 25 1.1 24 4 25 1.1 25 4 25 1.1 26 30 1.1 35 35 1.1 37 4 40 1.1 39 4 40 1.1 40 4 40 1.1 45 4 45 1.1 47 4 50 1.1 49 4 50 1.1 51 60 ELECTRIC HEAT DATA CBA25UH-024 | SINGLE PHASE Electric Heat Model Number Volt Input kW 1 Btuh Blower Motor Full Load Amps 2 Minimum Circuit Ampacity 3 Maximum Overcurrent Protection 4 kW ECBA25-4 (19V31) 208 3.0 10,250 1.6 20 4 20 Terminal Block 220 3.4 11,450 1.6 21 4 25 ECBA25-4CB (19V32) 30A Circuit Breaker 230 3.7 12,550 1.6 22 4 25 240 4.0 13,650 1.6 23 4 25 5 kW ECBA25-5 (16Y36) 208 3.6 12,300 1.6 24 4 25 Terminal Block 220 4.0 13,800 1.6 25 4 25 ECBA25-5CB (16Y39) 30A Circuit Breaker 230 4.4 15,000 1.6 26 30 240 4.8 16,400 1.6 27 30 7.5 kW ECBA25-7.5 (16Y37) 208 5.6 19,200 1.6 36 4 40 Terminal Block ECBA25-7.5CB (16Y41) 220 6.3 21,500 1.6 38 4 40 45A Circuit Breaker 230 6.9 23,500 1.6 39 4 40 240 7.5 25,600 1.6 41 45 10 kW ECBA25-10 (16Y38) 208 7.2 24,600 1.6 45 4 45 Terminal Block 220 8.0 27,500 1.6 48 4 50 ECBA25-10CB (16Y42) 60A Circuit Breaker 230 8.8 30,000 1.6 50 4 50 240 9.6 32,700 1.6 52 60 NOTE - Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps. 1 Electric heater capacity only - does not include additional blower motor heat capacity. 2 Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167°F. 3 HACR type breaker or fuse. 4 Bold indicates that the circuit breaker on "CB" circuit breaker models must be replaced with size shown. See table on page 13. Page 9 ELECTRIC HEAT DATA Electric Heat Model Number Volt Input kW 1 Btuh Blower Motor Full Load Amps CBA25UH-030 | SINGLE PHASE 2 Minimum Circuit Ampacity 3 Maximum Overcurrent Protection Single Point Power Source Ckt 1 Ckt 2 Ckt 1 2 Minimum 3 Maximum Ckt 2 Circuit Overcurrent Ampacity Protection 4 kW ECBA25-4 (19V31) 208 3.0 10,250 2.2 21 - - - 4 25 - - - - - - - - - Terminal Block ECBA25-4CB (19V32) 220 3.4 11,450 2.2 22 - - - 4 25 - - - - - - - - - 30A Circuit Breaker 230 3.7 12,550 2.2 23 - - - 4 25 - - - - - - - - - 240 4.0 13,650 2.2 24 - - - 4 25 - - - - - - - - - 5 kW ECBA25-5 (16Y36) 208 3.6 12,300 2.2 24 - - - 4 25 - - - - - - - - - Terminal Block ECBA25-5CB (16Y39) 220 4.0 13,800 2.2 26 - - - 30 - - - - - - - - - 30A Circuit Breaker 230 4.4 15,000 2.2 27 - - - 30 - - - - - - - - - 240 4.8 16,400 2.2 28 - - - 30 - - - - - - - - - 7.5 kW ECBA25-7.5 (16Y37) 208 5.6 19,200 2.2 37 - - - 4 40 - - - - - - - - - Terminal Block ECBA25-7.5CB (16Y41) 220 6.3 21,500 2.2 39 - - - 4 40 - - - - - - - - - 45A Circuit Breaker 230 6.9 23,500 2.2 40 - - - 4 40 - - - - - - - - - 240 7.5 25,600 2.2 42 - - - 45 - - - - - - - - - 10 kW ECBA25-10 (16Y38) 208 7.2 24,600 2.2 46 - - - 4 50 - - - - - - - - - Terminal Block ECBA25-10CB (16Y42) 220 8.0 27,500 2.2 49 - - - 4 50 - - - - - - - - - 60A Circuit Breaker 230 8.8 30,000 2.2 51 - - - 60 - - - - - - - - - 240 9.6 32,700 2.2 53 - - - 60 - - - - - - - - - 12.5 kW ECBA25-12.5CB (16Y43) 208 9.4 32,000 2.2 40 19 4 40 4 20 59 60 (1) 50A and (1) 25A Circuit Breaker 220 10.5 35,800 2.2 43 20 4 45 4 20 62 70 230 11.5 39,200 2.2 44 21 4 45 25 65 70 240 12.5 42,600 2.2 46 22 50 25 68 70 15 kW ECBA25-15CB (16Y44) 208 10.8 36,900 2.2 46 22 4 50 25 68 70 (1) 60A and (1) 25A Circuit Breaker 220 12.1 41,300 2.2 49 23 4 50 25 72 80 230 13.2 45,100 2.2 51 24 60 25 75 80 240 14.4 49,100 2.2 53 25 60 25 78 80 NOTE - Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps. 1 Electric heater capacity only - does not include additional blower motor heat capacity. 2 Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167°F. 3 HACR type breaker or fuse. 4 Bold indicates that the circuit breaker on "CB" circuit breaker models must be replaced with size shown. See table on page 13. Page 10 ELECTRIC HEAT DATA Electric Heat Model Number Volt Input kW 1 Btuh Blower Motor Full Load Amps CBA25UH-036 | SINGLE PHASE 2 Minimum Circuit Ampacity 3 Maximum Overcurrent Protection Single Point Power Source Ckt 1 Ckt 2 Ckt 1 2 Minimum 3 Maximum Ckt 2 Circuit Overcurrent Ampacity Protection 4 kW ECBA25-4 (19V31) 208 3.0 10,250 2.0 21 - - - 4 25 - - - - - - - - - Terminal Block ECBA25-4CB (19V32) 220 3.4 11,450 2.0 22 - - - 4 25 - - - - - - - - - 30A Circuit Breaker 230 3.7 12,550 2.0 22 - - - 4 25 - - - - - - - - - 240 4.0 13,650 2.0 23 - - - 4 25 - - - - - - - - - 5 kW ECBA25-5 (16Y36) 208 3.6 12,300 2.0 24 - - - 4 25 - - - - - - - - - Terminal Block ECBA25-5CB (16Y39) 220 4.0 13,800 2.0 25 - - - 4 25 - - - - - - - - - 30A Circuit Breaker 230 4.4 15,000 2.0 26 - - - 30 - - - - - - - - - 240 4.8 16,400 2.0 28 - - - 30 - - - - - - - - - 7.5 kW ECBA25-7.5 (16Y37) 208 5.6 19,200 2.0 36 - - - 4 40 - - - - - - - - - Terminal Block ECBA25-7.5CB (16Y41) 220 6.3 21,500 2.0 38 - - - 4 40 - - - - - - - - - 45A Circuit Breaker 230 6.9 23,500 2.0 40 - - - 4 40 - - - - - - - - - 240 7.5 25,600 2.0 42 - - - 45 - - - - - - - - - 10 kW ECBA25-10 (16Y38) 208 7.2 24,600 2.0 46 - - - 4 50 - - - - - - - - - Terminal Block ECBA25-10CB (16Y42) 220 8.0 27,500 2.0 48 - - - 4 50 - - - - - - - - - 60A Circuit Breaker 230 8.8 30,000 2.0 50 - - - 4 50 - - - - - - - - - 240 9.6 32,700 2.0 53 - - - 60 - - - - - - - - - 12.5 kW ECBA25-12.5CB (16Y43) 208 9.4 32,000 2.0 40 19 4 40 4 20 59 60 (1) 50A and (1) 25A Circuit Breaker 220 10.5 35,800 2.0 42 20 4 45 4 20 62 70 230 11.5 39,200 2.0 44 21 4 45 25 65 70 240 12.5 42,600 2.0 46 22 50 25 68 70 15 kW ECBA25-15CB (16Y44) 208 10.8 36,900 2.0 46 22 4 50 25 68 70 (1) 60A and (1) 25A Circuit Breaker 220 12.1 41,300 2.0 48 23 4 50 25 71 80 230 13.2 45,100 2.0 50 24 4 50 25 74 80 240 14.4 49,100 2.0 53 25 60 25 78 80 NOTE - Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps. 1 Electric heater capacity only - does not include additional blower motor heat capacity. 2 Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167°F. 3 HACR type breaker or fuse. 4 Bold indicates that the circuit breaker on "CB" circuit breaker models must be replaced with size shown. See table on page 13. Page 11 ELECTRIC HEAT DATA CBA25UH-042 | SINGLE PHASE Electric Heat Model Number Volt Input kW 1 Btuh Blower Motor Full Load Amps 2 Minimum Circuit Ampacity Ckt 1 Ckt 2 3 Maximum Overcurrent Protection Single Point Power Source Ckt 1 2 Minimum 3 Maximum Ckt 2 Circuit Overcurrent Ampacity Protection 4 kW ECBA25-4 (19V31) 208 3.0 10,250 2.5 21 - - - 4 25 - - - - - - - - - Terminal Block ECBA25-4CB (19V32) 220 3.4 11,450 2.5 22 - - - 4 25 - - - - - - - - - 30A Circuit Breaker 230 3.7 12,550 2.5 23 - - - 4 25 - - - - - - - - - 240 4.0 13,650 2.5 24 - - - 4 25 - - - - - - - - - 5 kW ECBA25-5 (16Y36) 208 3.6 12,300 2.5 25 - - - 4 25 - - - - - - - - - Terminal Block ECBA25-5CB (16Y39) 220 4.0 13,800 2.5 26 - - - 30 - - - - - - - - - 30A Circuit Breaker 230 4.4 15,000 2.5 27 - - - 30 - - - - - - - - - 240 4.8 16,400 2.5 28 - - - 30 - - - - - - - - - 7.5 kW ECBA25-7.5 (16Y37) 208 5.6 19,200 2.5 37 - - - 4 40 - - - - - - - - - Terminal Block ECBA25-7.5CB (16Y41) 220 6.3 21,500 2.5 39 - - - 4 40 - - - - - - - - - 45A Circuit Breaker 230 6.9 23,500 2.5 41 - - - 45 - - - - - - - - - 240 7.5 25,600 2.5 42 - - - 45 - - - - - - - - - 10 kW ECBA25-10 (16Y38) 208 7.2 24,600 2.5 46 - - - 4 50 - - - - - - - - - Terminal Block ECBA25-10CB (16Y42) 220 8.0 27,500 2.5 49 - - - 4 50 - - - - - - - - - 60A Circuit Breaker 230 8.8 30,000 2.5 51 - - - 60 - - - - - - - - - 240 9.6 32,700 2.5 53 - - - 60 - - - - - - - - - 12.5 kW ECBA25-12.5CB (16Y43) 208 9.4 32,000 2.5 41 19 4 45 4 20 60 60 (1) 50A and (1) 25A Circuit Breaker 220 10.5 35,800 2.5 43 20 4 45 4 20 63 70 230 11.5 39,200 2.5 45 21 4 45 25 66 70 240 12.5 42,600 2.5 47 22 50 25 68 70 15 kW ECBA25-15CB (16Y44) 208 10.8 36,900 2.5 46 22 4 50 25 68 70 (1) 60A and (1) 25A Circuit Breaker 220 12.1 41,300 2.5 49 23 4 50 25 72 80 230 13.2 45,100 2.5 51 24 60 25 75 80 240 14.4 49,100 2.5 53 25 60 25 78 80 NOTE - Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps. 1 Electric heater capacity only - does not include additional blower motor heat capacity. 2 Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167°F. 3 HACR type breaker or fuse. 4 Bold indicates that the circuit breaker on "CB" circuit breaker models must be replaced with size shown. See table on page 13. Page 12 ELECTRIC HEAT DATA CBA25UH-048 | CBA25UH-060 | SINGLE PHASE Electric Heat Model Number Volt Input kW 1 Btuh Blower Motor Full Load Amps 2 Minimum Circuit Ampacity Ckt 1 Ckt 2 3 Maximum Overcurrent Protection Single Point Power Source Ckt 1 2 Minimum 3 Maximum Ckt 2 Circuit Overcurrent Ampacity Protection 4 kW ECBA25-4 (19V31) 208 3.0 10,250 7.6 28 - - - 30 - - - - - - - - - Terminal Block ECBA25-4CB (19V32) 220 3.4 11,450 7.6 29 - - - 30 - - - - - - - - - 30A Circuit Breaker 230 3.7 12,550 7.6 29 - - - 30 - - - - - - - - - 240 4.0 13,650 7.6 30 - - - 30 - - - - - - - - - 5 kW ECBA25-5 (16Y36) 208 3.6 12,300 7.6 31 - - - 4 35 - - - - - - - - - Terminal Block ECBA25-5CB (16Y39) 220 4.0 13,800 7.6 32 - - - 4 35 - - - - - - - - - 30A Circuit Breaker 230 4.4 15,000 7.6 33 - - - 4 35 - - - - - - - - - 240 4.8 16,400 7.6 35 - - - 4 35 - - - - - - - - - 7.5 kW ECBA25-7.5 (16Y37) 208 5.6 19,200 7.6 43 - - - 45 - - - - - - - - - Terminal Block ECBA25-7.5CB (16Y41) 220 6.3 21,500 7.6 45 - - - 45 - - - - - - - - - 45A Circuit Breaker 230 6.9 23,500 7.6 47 - - - 4 50 - - - - - - - - - 240 7.5 25,600 7.6 49 - - - 4 50 - - - - - - - - - 10 kW ECBA25-10 (16Y38) 208 7.2 24,600 7.6 53 - - - 60 - - - - - - - - - Terminal Block ECBA25-10CB (16Y42) 220 8.0 27,500 7.6 55 - - - 60 - - - - - - - - - 60A Circuit Breaker 230 8.8 30,000 7.6 57 - - - 60 - - - - - - - - - 240 9.6 32,700 7.6 60 - - - 60 - - - - - - - - - 12.5 kW ECBA25-12.5CB (16Y43) 208 9.4 32,000 7.6 47 19 50 4 20 66 70 (1) 50A and (1) 25A Circuit Breaker 220 10.5 35,800 7.6 49 20 50 4 20 69 70 230 11.5 39,200 7.6 51 21 4 60 25 72 80 240 12.5 42,600 7.6 53 22 4 60 25 75 80 15 kW ECBA25-15CB (16Y44) 208 10.8 36,900 7.6 53 22 60 25 75 80 (1) 60A and (1) 25A Circuit Breaker 220 12.1 41,300 7.6 55 23 60 25 78 80 230 13.2 45,100 7.6 57 24 60 25 81 90 240 14.4 49,100 7.6 60 25 60 25 85 90 20 kW ECBA25-20CB (16Y46) 208 14.4 49,200 7.6 53 43 60 4 45 96 100 (1) 60A and (1) 50A Circuit Breaker 220 16.1 55,000 7.6 55 46 60 50 101 110 230 17.6 60,100 7.6 57 48 60 50 105 110 240 19.2 65,500 7.6 60 50 60 50 110 110 NOTE - Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps. 1 Electric heater capacity only - does not include additional blower motor heat capacity. 2 Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167°F. 3 HACR type breaker or fuse. 4 Bold indicates that the circuit breaker on "CB" circuit breaker models must be replaced with size shown. See table on page 13. Page 13 Heat Section Installation WARNING Before installing or servicing unit, be sure ALL power to the unit is OFF. More than one disconnect switch may be present. Electrical shock can cause personal injury or death! Before installing the unit, check information on the unit rating plate to ensure that the unit meets the job specification, proper electrical power is available, and that proper duct clearances are maintained. NOTE If installing heat sections at the same time as the air handler unit, install the electric heat section in the air handler unit before setting the air handler unit and attaching the plenum. 1 - Shut off all power to the air handler unit. More than one disconnect may be required. 2 - Remove air handler access panel and keep the six screws to reattach access panel after installing heat elements. 3 - Disconnect any existing field supply wires and pull them out of the air handler. Disconnect and remove wiring harness and fastener (see figure 6). If not removed, these items will prevent the heat section's base from resting properly in the compartment. 4 - Remove the no-heat seal plate in the air handler frame (see figure 6). NOTE If a small heater is installed in the unit, the installer will need to remove the no-heat plate and break it apart at the perforations and reinstall the two pieces so the smaller heater can be installed into the unit. WIRE HARNESS SEPARATE CONNECTOR; DISCARD WIRE HARNESS NO-HEAT SEAL PLATE REMOVE SCREWS; THEN REMOVE NO-HEAT SEAL PLATE REMOVE FASTENER SECURING WIRES IF PRESENT FIGURE 6. Prepare to Install Heat Element 5 - Slide the electric heat section into the air handler. Be careful that the heating elements do not rub against the sheet metal opening when they slide into the air handler. The mounting holes should then line up with holes in the air handler control box. 6 - Secure the electric heater assembly into place with the screws that were removed from the heat element panel. Install two field-provided #8 SDST screws in the front of the electric heater assembly (see figure 7). INSTALL SCREWS REMOVED FROM THE NO-HEAT SEAL PLATE. INSTALL 2 FIELD-PROVIDED SCREWS TO SECURE THE FRONT OF THE HEATER CIRCUIT BREAKER ASSEMBLY TO THE FRONT FLANGE OF THE AIR HANDLER. FIGURE 7. Installing the Heat Element Assembly 7 - The air handler's access panels have a cover plate that is fastened with a screw and will need to be positioned to fit either one breaker or two, but do not install the access panel until all electrical connections have been completed. WARNING Foil face insulation must be cut to eliminate the possibility for any frayed foil to come in contact with any main or low voltage connections. Insulation must be kept a minimum of 1/2" away from any electrical connection. CHANGING CIRCUIT BREAKER ORIENTATION The air handler comes from the factory ready for horizontal right hand discharge installation. Always rotate the breaker so up is the ON position in all orientations. The circuit breaker orientation change is required by UL 1995, Article 26.18 (25 September 2005). 1 - Locate the one clip located on the right side (see arrow) of each breaker (see figure 8). The clip secures the circuit breaker to the mounting bracket. Pull the clip to release the breaker from the mounting bracket and rotate the breaker to the proper postition. Page 14 NOTE - There may be only one clip securing each circuit breaker. CIRCUIT BREAKER BREAKER(S) MOUNTING BRACKET CLIP FIGURE 8. Circuit Breaker Clip 2 - Install the circuit breaker cover plate. IMPORTANT USE COPPER CONDUCTORS ONLY NOTE Refer to the nameplate on the air handler unit for minimum circuit ampacity and maximum overcurrent protection size. The air handler units are provided with openings to be used with 1-1/2 inch trade size (1-31/32 inch diameter) conduit. If you want a single point power supply, refer to the nameplate on the single point power supply accessory for minimum circuit ampacity and maximum overcurrent protection size. Select the proper supply circuit conductors in accordance with tables 310-16 and 310-17 in the National Electric Code, ANSI/NFPA No. 70 or tables 1 through 4 in the Canadian Electric Code, Part I, CSA Standard C22.1. Refer to figure 13 for typical low voltage field wiring for air handler/condensing unit and heat pump applications. Figure 10 is a diagram of the air handler connections and the heater high-voltage wiring. 1 - Make wiring connections as follows: Heaters equipped with circuit breakers Connect field power supply wiring to circuit breaker(s). Figure 5 shows L1, L2 and ground (GND) connections for a 2-breaker configuration. ON 60 OFF GND 208/240 VOLT FIELD SUPPLY WIRES L1 CIRCUIT 1 L2 ON 60 OFF FIGURE 9. Circuit Breaker Cover Plate NOTE If electric heat kit has only one circuit breaker, the breaker cover plate needs to be moved up and installed over the opening without the circuit breaker. Fasten the breaker cover plate to the access panel using the circled hole in figure 9. If the electric heat kit has two circuit breakers, the breaker cover plate is not required. Electrical Connections WARNING Electric shock hazard! - Disconnect all power supplies before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. Field Supply Ground Wires L1 CIRCUIT 2 L2 FIGURE 10. Field Power Supply Wiring 2 - Remove the interface harness from the air handler unit and connect the 6-pin connector on the heater assembly to the mating connector on the air handler unit. 3 - For applications using a two-stage room thermostat and/or an outdoor thermostat, connect wiring as shown in figures 9 and 10. Circuit Breaker Cover Installation 1 - Remove any installed patch plates still present. 2 - Remove paper backing from the adhesive around the perimeter of the back side of the circuit breaker cover (figure 11). 3 - Position the breaker cover over the air handler circuit breaker opening. Page 15 CIRCUIT BREAKER COVER (BACKSIDE) REMOVE PAPER COVERING ADHESIVE BACK FIGURE 11. Remove Paper Cover IMPORTANT Confirm air tight seal between breaker cover and air handler access panel. Apply a thin silicone bead to the adhesive back seat to ensure air tight seal. Failure to seal circuit breaker cover will allow warm moist air to be pulled into control panel which can create condensation to form on the circuit breaker and other electrical components within the control panel. 2 - Check the heat pump and the heat section for normal operation. 3 - Set the thermostat to desired setting. 4 - Affix the wiring diagram sticker to air handler scroll, aligned with circuit breaker unit wiring diagram sticker. Configuration Modification UPFLOW APPLICATION 1 - The air handler must be supported on the bottom only and set on solid floor or field-supplied support frame. Securely attach the air handler to the floor or support frame. 2 - If installing a unit in an upflow application, remove the horizontal drain pan. IMPORTANT - The horizontal drain pan is not required in upflow air discharge installations; its removal provides the best efficiency and air flow. 3 - Place the unit in the desired location and slope unit as previously mentioned. Connect return and supply air plenums as required using sheet metal screws. 4 - Install units that have no return air plenum on a stand that is at least 14" from the floor. This will allow proper air return. HORIZONTAL DRAIN PAN IMPORTANT! REMOVE PAN FOR BEST EFFICIENCY AND AIR FLOW. FIGURE 12. Typical Circuit Breaker Cover Installation Air Handler Speed Connections When using the electric heat sections with air handler units, you must adjust the air handler speed according to the size of electric heat and air handler unit. Air handler speed tap for electric heat in upflow and horizontal position is medium. For downflow it is high speed. See specific air handler installation instructions for air handler speed adjustment procedure and location. 1 - Set the thermostat above room temperature. UPFLOW DRAIN PAN HORIZONTAL DRAIN CONNECTIONS (BOTH SIDES; NOT USED) NECTIONS (BOTH SIDES; USE ONE SIDE OR OTHER) FIGURE 13. Upflow Configuration Page 16 HORIZONTAL APPLICATION IMPORTANT When removing the coil, there is possible danger of equipment damage and personal injury. Be careful when removing the coil assembly from a unit installed in rightor left-hand applications. The coil may tip into the drain pan once it is clear of the cabinet. Support the coil when removing it. ANGLE IRON OR SHEET METAL MAXIMUM 1/2" LONG SCREW E ANCE 4 IN. (102 MM) CABINET SUPPORT DRAIN PAN REINSTALLED HERE TOP CAP ROTATED TO CORRECT POSITION TOP CAP SCREWS 90º BEND DRAIN PAN SHIPPING LOCATION AIR FLOW FRONT VIEW END VIEW FIGURE 14. Suspend Horizontal Unit NOTE When the unit is installed in horizontal applications, a secondary drain pan is recommended. Refer to local codes. NOTE This unit may be installed in left- or right-hand air discharge horizontal applications. Adequate support must be provided to ensure cabinet integrity. Ensure that there is adequate room to remove service and access panels if installing in the horizontal position. LEFT-HAND DISCHARGE For horizontal left-hand air discharge, the following field modifications are required. 1 - Remove access panels and the corrugated padding between the blower and coil assembly. Discard the corrugated padding. 2 - Pull the coil assembly from unit. Pull off the horizontal drain pan. 3 - Remove the drain plugs from back drain holes on horizontal drain pan and reinstall them on front holes. IMPORTANT After removal of drain pan plug(s), check drain hole(s) to verify that drain opening is fully open and free of any debris. Also check to make sure that no debris has fallen into the drain pan during installation that may plug up the drain opening. 4 - Rotate drain pan 180º front-to-back and install it on the opposite side of the coil. 5 - Remove screws from top cap. 6 - Remove plastic plug from left hole on coil front end seal and reinstall plug in back hole. -------- DRAIN PLUGS -------- REINSTALLED HERE REMOVED FROM HERE COIL SHOWN IN UPLOAD POSITION FOR EASY CONVERSION TOP CAP ALIGN HOLES WITH HOLES IN COIL END PLATE. STARTING WITH THE ROUND HOLES ON THIS END. 90º BEND BACK COIL END SEAL FIGURE 15. Field Modification for Left-Hand Discharge 7 - Rotate top cap 180º front-to-back and align with unused screw holes. Holes must align with front and back coil end plates. The top cap has a 45º bend on one side and a 90º bend on the other. The 90º bend must be on the same side as the horizontal drain pan as illustrated in figure 4. DOWN-FLOW RAIL FRONT EDGE OF HORIZONTAL DRAIN PAN FIGURE 16. Left-Hand Discharge Configuration NOTE Be very careful when reinstalling the screws into the coil end plate engaging holes. Misaligned screws may damage the coil. 8 - From the upflow position, flip cabinet 90º to the left and set into place. Replace blower assembly. Secure coil in place by bending down the tab on the cabinet support rail as illustrated. 9 - Install the horizontal shield (-060 model) on the front edge of the horizontal drain pan as illustrated in figure 5. Page 17 NOTE For horizontal applications in high humidity areas, remove the downflow rail closest to the drain pan. To remove rail, remove screw from rail at back of unit and at cabinet support rail. Remove downflow rail then replace screws. Also, seal around the exiting drain pipe, liquid and suction lines to prevent infiltration of humid air. 10 - Knock out drain seal plate from access door. Secure plate to cabinet front flange with screw provided. 11 - Flip access door and replace it on the unit. 12 - Set unit so that it is sloped 1/4 toward the drain pan end of the unit. Connect return and supply air plenums as required using sheet metal screws. 13 - If suspending the unit, it must be supported along the entire length of the cabinet. If using chain or strap, use a piece of angle iron or sheet metal attached to the unit (either above or below) so that the full length of the cabinet is supported. Use securing screws no longer than 1/2 to avoid damage to coil or filter, as illustrated in figure 3. Connect return and supply air plenums as required using sheet metal screws. RIGHT-HAND DISCHARGE 1 - Determine which plugs are required for drain line connections. 2 - With access door removed, remove drain line plugs to install drain lines. 3 - Set unit so that it is sloped toward the upflow drain pan end of the unit and level from front to back of unit (see figure 7). 4 - The horizontal configuration is shown in figure 2. Drains AIR FLOW RIGHT-HAND DRAINS PLUGS FIGURE 17. Right-Hand Discharge Configuration 5 - If the unit is suspended, the entire length of the cabinet must be supported. If you use a chain or strap, use a piece of angle iron or sheet metal attached to the unit (either above or below) to support the length of the cabinet. Use securing screws no longer than 1/2 inch to avoid damaging the coil or filter. See figure 3. Use sheet metal screws to connect the return and supply air plenums as required. DOWNFLOW APPLICATION Use the following procedures to configure the unit for downflow operations: IMPORTANT If electric heat section with circuit breakers (ECB29/ ECB31) is installed in a CBA25UH unit in a downflow application, the circuit breakers must be rotated 180° to the UP position. See ECB29/ECB31 installation instructions for more details. Table 2 outlines the sizes of the various drip shields. NOTE - (-060 Model Only) Remove access panels and horizontal drip shield from the corrugated padding between the blower and coil assembly. 1 - Remove the coil assembly from the unit. 2 - For best efficiency and air flow, remove the horizontal drain pan from the units in downflow positions as illustrated in figure 6. 3 - Rotate cabinet 180º from the upright position. See figure 6. You may need to first remove the blower assembly to lighten the cabinet for lifting. 4 - Foam tape that is provided creates a seal between the drip shield and the coil so that water does not leak into the air stream. The foam tape pieces are precut. Apply the tape to the drip shields as illustrated in figure 7 and specified as follows: · Apply two pieces of foam tape provided down both ends of each shield. The tape should measure 4-3/4 X 2 (120 X 25 mm). Ensure that the tape covers both sides of the shield equally. · Apply the longer piece of 1 inch wide foam tape between the end pieces of tape. 5 - From the underside of the coil, install the downflow drip shield firmly in place as illustrated in figure 8. TABLE 1. Downflow Drip Shields (Tape Required) Units Length Width -018/024 Not Required Not Required -030 15-7/8 4-11/16 -036, -042 17-7/8 4-11/16 -048, -060 19-7/8 4-11/16 HORIZONTAL DRAIN PAN (REMOVE FROM UNIT) UP-LOAD / DOWNFLOW DRAIN PAN FIGURE 18. Downflow Discharge Position Page 18 SIDE VIEW 2" WIDE FOAM TAPE DRIP SHIELD 1" WIDE FOAM TAPE (LONGER PIECE) FIGURE 19. Applying Foam Tape to Drip Shield COIL DRIP SHIELD 8 - For downflow installation on combustible flooring, an additive base must be used as illustrated in figure 9. See CBA25UH Engineering Handbook for downflow combustible flooring base kits available for this air handler. 9 - Cut an opening appropriately sized for combustible base. Base dimensions are illustrated in figure 10. After opening has been cut, set the additive base into opening. Connect outlet air plenum to the additive base. Set the unit on the additive base so flanges of the unit drop into the base opening and seal against the insulation strips. The unit is now locked in place. Install return air plenum and secure with sheet metal screws. 1-5/8 (41) TOP VIEW 1-5/8 (41) 11-3/8 (289) 20 (508) 23-1/4 (591) DRIP PAN FIGURE 20. Downflow Drip Shields 6 - Replace the coil assembly and blower if you have removed it. Replace the coil access panel. 7 - Set the unit so that it is level. Using sheet metal screws, connect the return and supply air plenums as required. NOTE - For downflow application, metal or Class I supply and return air plenums must be used. AIR HANDER UNIT PROPERLY SIZED FLOOR OPENING COMBUSTIBLE FLOOR ADDITIVE BASE FIGURE 21. Downflow Combustible Flooring Base 1-5/8 (41) SUPPLY AIR OPENING 5/8 (16) 22-5/8 (575) -018/024 24-5/8 (625) -030, 036 26-5/8 (676) -042, 048, 060 13-1/2 (343) OPENING INCHES (MM) 3 (76) SIDE VIEW FIGURE 22. Downflow Combustible Base Dimensions Brazing Connections WARNING Polyol ester (POE) oils used with HFC-410A refrigerant absorb moisture very quickly. It is very important that the refrigerant system be kept closed as much as possible. DO NOT remove line set caps or service valve stub caps until you are ready to make connections. WARNING Danger of fire. Bleeding the refrigerant charge from only the high side may result in pressurization of the low side shell and suction tubing. Application of a brazing torch to a pressurized system may result in ignition of the refrigerant and oil mixture. Check the high and low pressures before applying heat. Page 19 IMPORTANT To prevent the build-up of high levels of nitrogen when purging, it must be done in a well-ventilated area. Purge low-pressure nitrogen (1 to 2 psig) through the refrigerant piping during brazing. This will help to prevent oxidation and the introduction of moisture into the system. WARNING Danger of explosion! Can cause equipment damage, injury, or death. When using a high pressure gas such as nitrogen to pressurize a refrigeration or air conditioning system, use a regulator that can control the pressure down to 1 or 2 psig (6.9 to 13.8 kPa). CAUTION Brazing alloys and flux contain materials which are hazardous to your health. Avoid breathing vapors or fumes from brazing operations. Perform operations only in well ventilated areas. Wear gloves and protective goggles or face shield to protect against burns. Wash hands with soap and water after handling brazing alloys and flux. WARNING When using a high pressure gas such as nitrogen to pressurize a refrigeration or air conditioning system, use a regulator that can control the pressure down to 1 or 2 psig (6.9 to 13.8 kPa). TABLE 2. CBA25UH Refrigerant Connections and Line Set Requirements Model Liquid Line Vapor Line L15 Line Sets -018/ 024 -030 -036 -042 -048 3/8 (10mm) 3/8 (10mm) 3/8 (10mm) 3/4 (19mm) 3/4 (19mm) 7/8" (22mm) L15 line set sizes are dependant on unit match-up. See Product Specifications (EHB) for outdoor unit to determine correct line set sizes -060 3/8 (10mm) 7/8" (22mm) Field fabricated NOTE - Some applications may require a field-provided 7/8 to 1-1/8 adapter. NOTE - When installing refrigerant lines longer than 50 feet, see the Lennox Refrigerant Piping Design and Fab- rication Guidelines, CORP. 9351-L9, or contact Lennox Technical Support Product Applications for assistance. Page 20 PLEASE READ IMPORTANT ISSUES CONCERNING BRAZING OPERATIONS ON PAGE 10 BEFORE PROCEEDING. C USE A WET RAG TO PROTECT CTXV SENSING BULB WHEN BRAZING SUCTION LINE CONNECTIONS. NOTE -- REFER TO OUTDOOR UNIT INSTALLATION INSTRUCTIONS FOR REFRIGERANT PIPING SIZE REQUIREMENTS . NOTE - Use silver alloy brazing rods with five or six percent minimum silver alloy for copper-to-copper brazing, 45 percent alloy for copper-to-brass and copper-to-steel brazing. A REMOVE ACCESS PANEL B REMOVE RUBBER PLUG FROM BOTH LIQUID AND SUCTION LINES NOTE -- CBA38MV SERIES UNITS USE NITROGEN OR DRY AIR AS A HOLDING CHARGE. IF THERE IS NO PRESSURE WHEN THE RUBBER PLUGS ARE REMOVED, CHECK THE COIL FOR LEAKS BEFORE INSTALLING. D EITHER REMOVE OR PUSH PIPE WRAPPING BACK THROUGH HOLE IN PIPING PLATE BEFORE LINE SET CONNECTION AND BRAZING. PIPING PLATE LOW HIGH F CONNECT GAUGES AND START NITROGEN FLOW FLOW REGULATED NITROGEN (AT 1 TO 2 PSIG) THROUGH THE REFRIGERATION GAUGE SET INTO THE VALVE STEM POR T CONNECTION ON THE OUTDOOR UNIT LIQUID LINE SER VICE VALVE AND OUT OF THE VALVE STEM PORT CONNECTION ON THE SUCTION SERVICE VALVE. NITROGEN E CONNECT PIPES NOTE -- REFRIGERANT LINE SETS SHOULD BE ROUTED TO ALLOW FILTER ACCESSIBILITY. I REPEAT PREVIOUS PROCEDURE FOR LIQUID LINE. G PLACE A WET RAG AGAINST PIPING PLATE AND AROUND THE SUCTION LINE CONNECTION. A H BRAZE CONNECTION. ALLOW PIPE TO COOL BEFORE REMOVING WET RAG FROM CTXV SENSING BULB AND PIPING PANEL AREA. REFER TO INSTRUCTIONS PROVIDED WITH OUTDOOR UNIT FOR LEAK TESTING, EVACUATING AND CHARGING PROCEDURES FIGURE 23. Brazing Connections Page 21 Installing the Condensate Drain IMPORTANT On units of this type, where the blower "draws" rather than "blows" air through the coil, traps must be installed in the condensate drain lines (primary and auxiliary, if used). Traps prevent the blower from drawing air through the drain lines into the air supply. ABOVE FINISHED SPACE? NO OVERFLOW DRAIN LINE ALWAYS RUN AN OVERFLOW DRAIN LINE. IF NOT POSSIBLE TO ROUTE OVERFLOW DRAIN LINE, INSTALL LOW VOLTAGE OVERFLOW SWITCH KIT. WIRE KIT TO SHUT DOWN COMPRESSOR PER INSTRUCTIONS. LENNOX # X3169 COMPACT OVERFLOW SWITCH WITH 3/4" FEMALE SLIP INLET AND MALE ADAPTER, TWO PART DESIGN FOR USE WHERE OBSTRUCTIONS PREVENT DIRECT THREADING VENT MUST EXTEND ABOVE HEIGHT OF COIL DRAIN PAN BY TWO INCHES (51MM) CLEAN OUT PRESS IN (DO NOT GLUE) VENT AIR HANDLER DRAIN PAN OVERFLOW DRAIN MAIN DRAIN YES 1" X 3/4" X 3/4" REDUCING TEE WITH PLUG NOTE -- WHEN A AIR HANDLER IS LOCATED ABOVE A FINISHED SPACE THE SECONDARY DRAIN PAN MUST HAVE A LARGER FOOTPRINT THAN THE AIR HANDLER. SECONDARY DRAIN PAN WHEN A COIL IS LOCATED ABOVE A FINISHED SPACE, A 3/4" (19.1MM) SECONDARY DRAIN LINE MUST BE: CONNECTED TO SECONDARY DRAIN PAN MAIN DRAIN CUT TO REQUIRED LENGTH PROVIDED PIPE NIPPLE 2 SIDE VIEW LENNOX 1 P-TRAP 49P66, J-TRAP # 91P90 OR ANY PVC SCH 40 P- OR J-TRAP 3/4" OR CONNECTED TO THE OVERFLOW THE AIR HANDLER DRAIN PAN. DRAIN OUTLET OF FOR NEGATIVE PRESSURE COILS (BLOWER AFTER COIL) TRAPS ARE REQUIRED ON ALL DRAIN LINES CONNECTED TO COIL. TRAPS MUST BE DEEP ENOUGH TO OFFSET MAXIMUM STATIC DIFFERENCES -- GENERALLY, TWO INCHES (51MM). 1 LENNOX P-TRAP 49P66 REQUIRES A LARGER INSTALLATION SPACE THAN THE J-TRAP 91P90. 2 PIPE NIPPLE PROVIDED IN BAG ASSEMBLY - SCH 80, 3/4" I. D. X 5" - 34K7401 (1): CUT THE PIPE IN HALF AND USE IT TO ROUTE THE MAIN DRAIN. 2" (51MM) TRAP DEPTH TO APPROVED DRAIN DRAIN LINE SHOULD SLOPE A MINIMUM OF ONE INCH PER 10 FEET (25MM PER 3 METERS) FIGURE 24. Typical Main and Overflow Drain Installations IMPORTANT After removal of drain pan plug(s), check drain hole(s) to verify that drain opening is fully open and free of any debris. Also check to make sure that no debris has fallen into the drain pan during installation that may plug up the drain opening. 1 - Remove the appropriate drain knockouts. If necessary, remove the indoor coil assembly from the cabinet. 2 - Connect primary drain line connection to the primary drain pan connection. The primary drain connection is flush with the bottom of the inside of the pan. Secondary connection is raised above the bottom of the inside of the pan. NOTE When making drain fitting connections to the drain pan, hand tighten the fitting and use a thread sealant. Over-tightening the fittings can split connections on the drain pan. 3 - If the auxiliary drain line is to be used, remove the plug and route the drain line so that water draining from the outlet will be easily noticed by the homeowner. The auxiliary drain line does not require venting or a trap. Refer to local codes. 4 - After removal of drain pan plugs, check the drain port to see if holes have been drilled. If not drilled, use a 19/32" bit to drill out the primary drain hole; use a 3/8" drill bit for the secondary drain hole. Remove all drill shavings. 5 - Make sure drain ports and drain pan are free of all debris. Page 22 6 - Plug and check any unused drain pan openings for tightness. Torque plugs to 30 in. lb. to prevent water leaks or seepage from the drain pan. 7 - Install a 2" trap in the primary drain lines as close to the unit as practical (see figure 24). Make sure the top of the trap is below the connection to the drain pan to allow complete drainage of the pan. NOTE Horizontal runs must have an anti-siphon air vent (standpipe) installed ahead of the horizontal run. An extremely long horizontal run may require an oversized drain line to eliminate air trapping. NOTE Do not operate air handler without a drain trap. The condensate drain is on the negative pressure side of the blower; therefore, air being pulled through the condensate line will prevent positive drainage without a proper trap. 8 - Route the drain line to the outside or to an appropriate drain. Drain lines must be installed so they do not block service access to the front of the air handler. A 24" clearance is required for filter, coil, or blower removal and service access. NOTE Check local codes before connecting the drain line to an existing drainage system. Insulate the drain lines where sweating could cause water damage. TEST CONDENSATE DRAIN Test the drain pan and drain line after installation: 1 - Pour several quarts of water into drain pan, enough to fill drain trap and line. 2 - Check to make sure the drain pan is draining completely, no leaks are found in drain line fittings, and water is draining from the end of the primary drain line. 3 - Correct any leaks found. BEST PRACTICES The following best practices are recommended for the condensate removal process: · Main and overflow drain lines should NOT be smaller than both drain connections at drain pan. · Overflow drain line should run to an area where homeowner will notice drainage. · It is recommended that the overflow drain line be vented and a trap installed. Refer to local codes. · Condensate drain lines must be configured or provided with a cleanout to permit the clearing of blockages and for maintenance without requiring the drain line to be cut. IMPORTANT A field-fabricated secondary drain pan, with a drain pipe to the outside of the building, is required in all installations over a finished living space or in any area that may be damaged by overflow from the main drain pan. In some localities, local codes may require a secondary drain pan for any horizontal installation. DUCT SYSTEM The air handler is provided with flanges for the connection of the plenum and ducts. The air handler is equipped with flanges that can form a filter rack for the installation of the air filter, or the filter may be installed as part of the return air duct system. Supply and return duct system must be adequately sized to meet the system's air requirements and static pressure capabilities. The duct system should be insulated with a minimum of 1" thick insulation with a vapor barrier in conditioned areas or 2" minimum in unconditioned areas. Supply plenum should be the same size as the flanged opening provided around the blower outlet and should extend at least 3 ft. from the air handler before turning or branching off plenum into duct runs. The plenum forms an extension of the blower housing and minimizes air expansion losses from the blower. INSTALLING DUCT SYSTEM Connect supply air duct to the flange on top of the air handler. If an isolation connector is used, it must be nonflammable. A return air duct system is recommended. If the unit is installed in a confined space or closet, a return connection must be run, full size, to a location outside the closet. CONNECTING REFRIGERANT LINES Refrigerant lines must be connected by a qualified technician in accordance with established procedures. IMPORTANT Refrigerant lines must be clean, dehydrated, refrigerantgrade copper lines. Air handler coils should be installed only with specified line sizes for approved system combinations. Handle the refrigerant lines gently during the installation process. Sharp bends or possible kinking in the lines will cause a restriction. Do not remove the caps from the lines or system connection points until connections are ready to be completed. 1 - Route the suction and liquid lines from the fittings on the indoor coil to the fittings on the outdoor unit. Run the lines in as direct a path as possible avoiding unnecessary turns and bends. 2 - Make sure that the suction line is insulated over the entire exposed length and that neither suction nor liquid lines are in direct contact with floors, walls, duct system, floor joists, or other piping. 3 - Connect the suction and liquid lines to the evaporator coil. 4 - To avoid damaging the rubber grommets in the cabinet while brazing, slide the rubber grommets over the refrigerant lines until they are away from the heat source. 5 - Braze using an alloy of silver or copper and phosphorus with a melting point above 1,100°F (593°C). Page 23 NOTE Do not use soft solder. 6. Reinstall the rubber grommets after brazing is finished. 7. Make sure outdoor unit has been put in place according to the Installation Instructions and is connected to the refrigerant lines. SEALING THE UNIT Seal the unit so that warm air is not allowed into the cabinet. Warm air introduces moisture, which results in water blow-off problems. This is especially important when the unit is installed in an unconditioned area. If installed in an unconditioned space, sealant should be applied around the electrical wires, refrigerant tubing, and condensate lines where they enter the cabinet. WARNING There must be an airtight seal between the bottom of the air handler and the return air plenum. Use fiberglass sealing strips, caulking, or equivalent sealing method between the plenum and the air handler cabinet to ensure a tight seal. Return air must not be drawn from a room where this air handler or any gas-fueled appliance (i.e., water heater), or carbon monoxide-producing device (i.e., wood fireplace) is installed. Make sure the liquid line and suction line entry points are sealed with either the provided flexible elastomeric thermal insulation, or field provided material (e.g. Armaflex, Permagum or equivalent). Any of the previously mentioned materials may be used to seal around the main and auxiliary drains, and around open areas of electrical inlets. Electrical Connections WARNING Electric Shock Hazard. Can cause injury or death. Unit must be properly grounded in accordance with national and local codes. Line voltage is present at all components when unit is not in operation on units with singlepole contactors. Disconnect all remote electric power supplies before opening access panel. Unit may have multiple power supplies. WARNING Electric Shock Hazard. Can cause injury or death. Foil-faced insulation has conductive characteristics similar to metal. Be sure there are no electrical connections within a ½" of the insulation. If the foil-faced insulation comes in contact with electrical voltage, the foil could provide a path for current to pass through to the outer metal cabinet. While the current produced may not be enough to trip existing electrical safety devices (e.g. fuses or circuit breakers), the current can be enough to cause an electric shock hazard that could cause personal injury or death. · All field wiring must be done in accordance with National Electrical Code, applicable requirements of UL and local codes, where applicable. · Electrical wiring, disconnect means and over-current protection are to be supplied by the installer. Refer to the air handler rating plate for maximum over-current protection, minimum circuit ampacity, as well as operating voltage. · The power supply must be sized and protected according to the specifications supplied on the product. · This air handler is factory-configured for 240 volt, single phase, 60 cycles. For 208-volt applications, see "208 Volt Conversion" later in this section. · For optional field-installed electric heat applications, refer to the instructions provided with the accessory for proper installation. IMPORTANT USE COPPER CONDUCTORS ONLY 1 - Disconnect all power supplies. 2 - Remove the air handler access panel. 3 - Route the field supply wires to the air handler electrical connection box. 4 - Use UL-listed wire nuts to connect the field supply conductors to the unit black and yellow leads, and the ground wire to ground terminal marked GND. 5 - 5. Replace the air handler access panel. CONNECT BLACK AND YELLOW WIRES TO FIELD-PROVIDED CONDUCTORS. CONNECT GROUND WIRE TO GROUND TERMINAL MARKED "GND" FIGURE 25. Making Electrical Connections Page 24 208 VOLT CONVERSION 1 - Disconnect all power supplies. 2 - Remove the air handler access panel. 3 - Using the wiring diagram located on the unit access panel as a reference, move the 2 connected black transformer leads from the 240 volt terminal on the transformer to the 208 volt terminal on the transformer. WARNING Electrically ground air handler. Connect ground wire to ground terminal marked "GND". Failure to do so can result in death or electrical shock. Inspecting and Replacing Filters IMPORTANT Filter access door must be in place during unit operation. Excessive warm air entering the unit from unconditioned space may result in water blow-off problems. Filters may be duct-mounted or installed in the cabinet. A filter is installed at the factory. Note that filter access door fits over access panel. Air will leak if the access panel is placed over the filter door. Filters should be inspected monthly and must be cleaned or replaced when dirty to assure proper furnace operation. To replace filter: 1 - Loosen the thumbscrews holding the filter panel in place. 2 - Slide the filter out of the guides on either side of cabinet. 3 - Insert new filter. 4 - Replace panel. See table 3 for replacement filter sizes. TABLE 3. Filter Dimensions CBA25UH Filter Size In. (mm) -018/024, -030, -036 15 x 20 x 1 (381 x 508 x 25) -042, -048, -060 18 x 20 x 1 (457 x 508 x 25) Page 25 Wiring Diagrams THERMOSTAT R G AIR HANDLER SEE BU NOTE Y AIR CONDITIONER UNIT COOLING-ONLY APPLICATION THERMOSTAT R G AIR HANDLER W BK SEE NOTE Y BU THERMOSTAT R G SEE BU NOTE W AIR HANDLER THERMOSTAT HEAT-ONLY APPLICATION AIR HANDLER R CONNECT COMMON WIRE ONLY IF REQUIRED (REFER TO THE APPROPRIATE THERMOSTAT INSTALLATION INSTRUCTIONS) G BU BK W HEAT PUMP UNIT AIR CONDITIONER UNIT HEAT PUMP APPLICATION WITH ELECTRIC HEAT COOLING APPLICATION WITH ELECTRIC HEAT NOTE - Connect common wire only if required (Refer to the appropriate thermostat installation instructions) FIGURE 26. Low Voltage Connections (3-Speed PSC Motor) Field Wiring Page 26 THERMOSTAT AIR HANDLER R G W BK BU THERMOSTAT Air Handler CONDENSING UNIT AIR HANDLER R HEAT PUMP UNIT CONNECT COMMON WIRE ONLY IF REQUIRED (REFER TO THE APPROPRIATE THERMOSTAT INSTALLATION INSTRUCTIONS) G BU S23 OUTDOOR THERMOSTAT (IF USED) BK K22 EM HEAT RELAY W Heat Pump Application With Electric Heat FIGURE 27. Low Voltage Field Wiring Electric Heat Page 27 4KW & 5KW FIGURE 28. Unit Wiring Diagram Electric Heat and Air Handler Page 28 4KW & 5KW FIGURE 29. Unit Wiring Diagram Electric Heat and Air Handler Page 29 Professional Maintenance NOTICE ! Failure to follow instructions will cause damage to the unit. This unit is equipped with an aluminum coil. Aluminum coils may be damaged by exposure to solutions with a pH below 5 or above 9. The aluminum coil should be cleaned using potable water at a moderate pressure (less than 50psi). If the coil cannot be cleaned using water alone, Lennox recommends use of a coil cleaner with a pH in the range of 5 to 9. The coil must be rinsed thoroughly after cleaning. In coastal areas, the coil should be cleaned with potable water several times per year to avoid corrosive buildup (salt). Check-out Procedures IMPORTANT During installation, service or maintenance, make sure that copper tubing does not rub against metal edges or other copper tubing. Care should also be taken to ensure that tubing does not become kinked. Use wire ties to secure tubing to prevent movement. Do not secure electrical wires to tubing that carries hot refrigerant gas. Heat from the tubing may melt the wiring insulation, causing a short circuit. NOTE Refer to outdoor unit installation instructions for system start-up instructions and refrigerant charging instructions. PRE-START-UP CHECKS · Is the air handler properly and securely installed? · If horizontally configured, is the unit sloped up to 1/4 inch toward drain lines? · Will the unit be accessible for servicing? · Has an auxiliary pan been provided under the unit with separate drain for units installed above a finished ceiling or in any installation where condensate overflow could cause damage? · Have ALL unused drain pan ports been properly plugged? · Has the condensate line been properly sized, run, trapped, pitched, and tested? · Is the duct system correctly sized, run, sealed, and insulated? · Have all cabinet openings and wiring been sealed? · Is the indoor coil factory-installed TXV properly sized for the outdoor unit being used? · Have all unused parts and packaging been disposed of? · Is the filter clean, in place, and of adequate size? · Is the wiring neat, correct, and in accordance with the wiring diagram? · Is the unit properly grounded and protected (fused)? · Is the thermostat correctly wired and in a good location? · Are all access panels in place and secure? CHECK BLOWER OPERATION · Set thermostat to FAN ON. · The indoor blower should come on. CHECK COOLING OPERATION · Set thermostat to force a call for cooling (approximately 5ºF lower than the indoor ambient temperature). · The outdoor unit should come on immediately and the indoor blower should start between 30 - 60 seconds later. · Check the air flow from a register to confirm that the system is moving cooled air. · Set the thermostat 5ºF higher than the indoor temperature. The indoor blower and outdoor unit should cycle off. CHECK ELECTRIC HEAT (IF USED) · Set thermostat to call for auxiliary heat (approximate- ly 5°F above ambient temperature). The indoor blower and auxiliary heat should come on together. Allow a minimum of 3 minutes for all sequencers to cycle on. · Set the thermostat so that it does not call for heat. Allow up to 5 minutes for all sequencers to cycle off. Use of Air Handler During Construction Lennox does not recommend the use of its air handler unit during any phase of construction. Very low return air temperatures, harmful vapors and operation of the unit with clogged or misplaced filters will damage the unit. Air handler units may be used for heating (heat pumps) or cooling of buildings under construction, if the following conditions are met: · A room thermostat must control the air handler. The use of fixed jumpers is not allowed. · Air filter must be installed in the system and must be maintained during construction. · Air filter must be replaced upon construction completion. · The air handler evaporator coil, supply fan assembly and duct system must be thoroughly cleaned following final construction clean-up. · All air handler operating conditions must be verified according to these installation instructions. Page 30 Sequence of Operation COOLING (COOLING ONLY OR HEAT PUMP) When the thermostat calls for cooling, 24 volts is put on the blower time-delay relay coil and then the indoor blower relay energizes. The normally open contacts close, causing the indoor blower motor to operate. The circuit between R and Y is completed, closing the circuit to the contactor in the outdoor unit, starting the compressor and outdoor fan motor. On heat pumps, circuit R and O energizes the reversing valve, switching the valve to the cooling position. (The reversing valve remains energized as long as the thermostat selector switch is in the COOL position.) At the completion of the cooling demand, the indoor blower and outdoor unit should cycle off. Air handler should cycle off 45 seconds after the outdoor unit shuts off. HEATING (ELECTRIC HEAT ONLY) When the thermostat calls for heat, the circuit between R and W is completed, and the heat sequencer is energized. A time delay follows before the heating elements and the indoor blower motor come on. Units with a second heat sequencer can be connected with the first sequencer to W on the thermostat subbase, or they may also be connected to a second stage on the subbase. HEATING (HEAT PUMP) When the thermostat calls for heating, 24 volts is put on the blower time-delay relay coil. Then normally open contacts close, causing the indoor blower motor to operate. The circuit between R and Y is completed, closing the circuit to the contactor in the outdoor unit, starting the compressor and outdoor fan motor. If the room temperature should continue to fall, the circuit between R and W1 is completed by the second-stage heat room thermostat. Circuit R-W1 energizes a heat sequencer. The completed circuit will energize supplemental electric heat (if applicable). Units with a second heat sequencer can be connected with the first sequencer to W1 on the thermostat. They may also be connected to a second heating stage W2 on the thermostat subbase. EMERGENCY HEAT (HEATING HEAT PUMP) If the selector switch on the thermostat is set to the emergency heat position, the heat pump will be locked out of the heating circuit, and all heating will be electric heat (if applicable). A jumper should be placed between W2 and E on the thermostat subbase so that the electric heat control will transfer to the first-stage heat on the thermostat. This will allow the indoor blower to cycle on and off with the electric heat when the fan switch is in the AUTO position. Page 31 Installing Contractor's Name_______________________ Installing Contractor's Phone_______________________ Job Address____________________________________ Installing Date_______________________________ Air Handler Model #___________________________ SUPPLY AIR Thermostat 9 Disconnect Switch Line Voltage 3 8 1 Duct System Temperature 5 2 Integrated Control 6 Blower Motor Amps 7 Electric Heat Amps Duct Static RETURN AIR Filter 4 Drain Line 1 DUCT SYSTEM SUPPLY AIR DUCT Sealed Insulated (if necessary) Registers Open and Unobstructed RETURN AIR DUCT Sealed Filter Installed and Clean Registers Open and Unobstructed 2 INTEGRATED CONTROL Jumpers Configured Correctly (if applicable) Appropriate Links in Place (if applicable) 3 VOLTAGE CHECK Supply Voltage ___________ Low Voltage _____________ Electrial Connections Tight 4 DRAIN LINE Leak Free 5 TOTAL EXTERNAL STATIC (dry coil) dry coil wet coil Supply External Static ______ ______ Return External Static ______ ______ Total External Static = ______ ______ 6 ELECTRIC HEAT AMPS____________ 7 INDOOR BLOWER AMPS___________ INDOOR BLOWER CFM____________ 8 TEMPERATURE DROP (Cooling Mode) Return Duct Temperature ___________ Supply Duct Temperature - ___________ Temperature Drop = ___________ 8 TEMPERATURE RISE (Heating Mode) Return Duct Temperature __________ Supply Duct Temperature - __________ Temperature Rise = __________ 9 THERMOSTAT Adjusted and Programmed Operation Explained to Owner Explained Operation of System to Homeowner Technician's Name:_______________________Date Start-Up & Performance Check Completed__________ FIGURE 30. Start-up and Performance Checklist (Upflow Configuration) Page 32 Installing Contractor's Name_______________________ Installing Date_______________________________ Installing Contractor's Phone_______________________ Air Handler Model #___________________________ Job Address____________________________________ 1 Duct System 2 Integrated Control Filter Thermostat 9 Disconnect Switch Line Voltage 3 1 Duct System RETURN AIR SUPPLY AIR 4 Drain Line 5 8 Duct Static Temperature 6 Electric Heat Amps 7 Blower motor Amps 1 DUCT SYSTEM SUPPLY AIR DUCT Sealed Insulated (if necessary) Registers Open and Unobstructed RETURN AIR DUCT Sealed Filter Installed and Clean Registers Open and Unobstructed 2 INTEGRATED CONTROL Jumpers Configured Correctly (if applicable) Appropriate Links in Place (if applicable) 3 VOLTAGE CHECK Supply Voltage ___________ Low Voltage _____________ Electrial Connections Tight 4 DRAIN LINE Leak Free 5 TOTAL EXTERNAL STATIC (dry coil) dry coil wet coil Supply External Static ______ ______ Return External Static ______ ______ Total External Static = ______ ______ 6 ELECTRIC HEAT AMPS____________ 7 INDOOR BLOWER AMPS___________ INDOOR BLOWER CFM____________ 8 TEMPERATURE DROP (Cooling Mode) Return Duct Temperature ___________ Supply Duct Temperature - ___________ Temperature Drop = ___________ 8 TEMPERATURE RISE (Heating Mode) Return Duct Temperature __________ Supply Duct Temperature - __________ Temperature Rise = __________ 9 THERMOSTAT Adjusted and Programmed Operation Explained to Owner Explained Operation of System to Homeowner Technician's Name:_______________________Date Start-Up & Performance Check Completed__________ FIGURE 31. Start-Up and Performance Checklist (Horizontal Configuration) Page 33Adobe PDF Library 15.0