Installer's Guide: Trane TEM6 Series Convertible Air Handlers

Safety Warnings

WARNING: Only qualified personnel should install and service this equipment. Improper installation or servicing by unqualified individuals can result in death or serious injury. Always observe all precautions listed in the literature and on equipment tags, stickers, and labels.

WARNING: HAZARDOUS VOLTAGE! Disconnect all electric power, including remote disconnects, before servicing. Follow proper lockout/tagout procedures to prevent accidental energization.

CAUTION: GROUNDING REQUIRED! Ensure all grounding devices are inspected and properly reconnected. All parts capable of conducting electrical current must be grounded.

WARNING: LIVE ELECTRICAL COMPONENTS! Follow all electrical safety precautions when working with live components during installation, testing, servicing, or troubleshooting.

WARNING: PRESSURIZED REFRIGERANT! System contains oil and refrigerant under high pressure. Recover refrigerant to relieve pressure before opening the system. Do not use non-approved refrigerants, substitutes, or additives.

CAUTION: SHARP EDGE HAZARD! Be careful of sharp edges on equipment or sheet metal cuts during installation or servicing.

CAUTION: HAZARDOUS VAPORS! Avoid using the air handler during finishing phases of construction or remodeling to prevent corrosion damage from condensate forming in the presence of chlorides and fluorides from paints, varnishes, adhesives, etc.

CAUTION: COIL IS PRESSURIZED! The coil is pressurized with approximately 8-12 psi dry air and factory leak-checked. Carefully release pressure by removing the rubber plug on the liquid line. Check for leaks if no pressure is released.

SAFETY HAZARD! This appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless supervised or instructed.

WARNING: Children should be supervised to ensure they do not play with the appliance.

WARNING: California Proposition 65. This product can expose you to chemicals, including lead, known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

Installation Requirements

Installation must comply with the National Electric Code (NFPA No. 90A and 90B) and any other local codes or utility requirements.

These air handlers have been evaluated and are suitable for mobile home use.

Condensation may occur on the air handler surface when installed in unconditioned spaces. Ensure all electrical and refrigerant line penetrations are sealed completely in such installations.

The manufacturer recommends installing AHRI-approved, matched indoor and outdoor systems for maximum efficiency, optimum performance, and reliability.

Features

Standard Features

• Multi-position installation: Upflow, Downflow, Horizontal Left, and Horizontal Right.
• Painted finish on galvanized steel exterior with a fully insulated cabinet (R4.2 value).
• Sturdy polycarbonate drain pans.
• Factory installed drain pans shipped for upflow and horizontal left applications.
• 208/230 VAC operation.
• Variable-speed direct drive blower.
• Factory installed R-410A Thermal Expansion Valve (TXV).
• All aluminum coil.
• Bottom return.
• Meets minimum leakage requirements for Florida and California Building Codes.

Optional Accessories

• 4, 5, 8, 10, 15, 20, and 25 KW single phase electric heaters (with circuit breakers or lugs).
• Single point power entry kit (for 15 and 20 KW heaters).
• Supply duct flange kit.
• Downflow sub-base kits (TAYBASE185, TAYBASE235, TAYBASE260).
• Slim fit filter box kit (BAYSF1185AAA, BAYSF1235AAA, BAYSF1265AAA).

Installation Instructions

1. Unpacking

Carefully unpack the unit and inspect for damage. Notify the carrier immediately if damage is found. Verify the rating plate matches the ordered model number and voltage. Report any discrepancies or parts shortages to the manufacturer within 5 days.

2. Location

Install the air handler centrally. Ensure minimum clearances are met. A downflow sub-base may be required for electric heat applications. The unit must be installed level to ensure proper condensation drainage; a slight slope (up to 1/4 inch over width/depth) towards the drain is permissible. For closet/utility room installations, ensure adequate space for replacement and servicing (21" clearance from front). For unconditioned spaces (attics, crawl spaces), ensure sufficient air circulation to prevent moisture collection. A drain pan is mandatory under the unit in these locations or above finished ceilings.

3. Duct Work

Install duct work in accordance with NFPA No. 90A and 90B, and applicable building codes. Insulate duct work as required by governing bodies.

4. Condensate Drain

The unit has primary and auxiliary 3/4" NPT condensate drains. The primary drain must be trapped outside the unit and piped per building codes. The trap's water column height must at least equal the normal negative static pressure during operation. A greater height is advisable to account for static increases from dirty filters or start-up bounce. Do not reduce the drain line size below the pan connection. All drains must pitch downward at a minimum of 1/4" per foot. If a cleanout Tee is used, the standpipe must be sealed/capped. If a vent Tee is used, it must be downstream from the trap.

Diagram Description: A diagram shows a U-shaped condensate trap. 'A' indicates the water column height, equal to the system's negative static pressure. 'C' indicates a dimension that should be at least twice the maximum negative static pressure.

Insulate the primary drain line to prevent sweating where dew point temperatures may be encountered.

5. Refrigerant Piping

Size external refrigerant piping according to the outdoor equipment manufacturer's instructions.

6. Metering Device

All units are shipped with an internally-checked, non-bleed TXV designed for AC or heat pump operation. Some outdoor models may require a start assist kit.

7. Blower

The unit features a variable speed motor with a direct drive blower wheel for adjustable airflow. Factory settings are provided for cooling and heating. Performance tables are available for additional airflow settings. Always disconnect power before making adjustments.

8. Airflow Adjustment

CAUTION: EQUIPMENT DAMAGE! Failure to follow this procedure may result in equipment damage. Disconnect power before changing dip switch positions.

Blower speed is controlled by the ECM Fan Control. An 8-dip switch bank adjusts airflow for outdoor unit size (tons), cooling/heating airflow, and fan off-delay options. Refer to the Airflow Label on the unit or Blower Performance Tables for correct settings.

Diagram Description (Figure 1): The ECM Fan Control shows a CFM Selection Light and DIP Switches.

Diagram Description (Figure 2): The DIP Switches are labeled for Cooling Airflow (SW1-SW4), Fan Off Delay Options (SW5-SW6), and Auxiliary Heat Speeds (SW7-SW8).

Indoor Blower Timing: Leave dip switches 5 and 6 in their factory-shipped positions during initial system startup and checkout. Adjust as needed afterward.

(a) Default setting. (b) Enhanced Mode provides gradual blower speed changes for improved comfort, quietness, and potential energy savings.

Diagram Description (Figure 3): A graph illustrates blower operation (CFM) over time for Enhanced Mode, showing ramping up and down of fan speed during compressor operation and heating/cooling cycles.

9. Wiring

Consult all unit and outdoor equipment wiring diagrams for compatibility and specific requirements. Field wiring must comply with the latest National Electric Code (NFPA No. 70) and local codes. Check unit rating plates for voltage, minimum circuit ampacity (MCA), and maximum overcurrent protection (MOP). Use only 75°C minimum copper conductors, sized per code. The unit is shipped wired for 230/240V AC, 60Hz, 1 Phase. For 208V operation, adjust the low voltage transformer per the wiring diagram. Class 2 low voltage control wiring must be separated from power wiring unless appropriate Class 1 wire is used. Use 18 AWG (105°C minimum) color-coded wire for low voltage control wiring; use 16 AWG for lengths over 100 ft. Ensure separation between control and power wiring.

Wiring Diagram Descriptions:

• Single Stage, Cooling Only: Thermostat R to Air Handler R; Thermostat G to Air Handler G; Thermostat Y to Air Handler Y1; Thermostat W1 to Air Handler W1; Thermostat W2 to Air Handler W2. Outdoor unit connections are Y, G, O, B.
• Single Stage, HP: Thermostat R to Air Handler R; Thermostat G to Air Handler G; Thermostat Y to Air Handler Y1; Thermostat W1 to Air Handler W1; Thermostat W2 to Air Handler W2 (Optional). Outdoor unit connections are Y, G, O, X2, B.
• 2 Stage, 2 Step, Cooling Only: Thermostat R to Air Handler R; Thermostat G to Air Handler G; Thermostat Y1 to Air Handler Y1; Thermostat Y2 to Air Handler Y2; Thermostat W1 to Air Handler W1; Thermostat W2 to Air Handler W2. Outdoor unit connections are Y1, Y2, G, B.
• 2 Stage, 2 Step, HP: Thermostat R to Air Handler R; Thermostat G to Air Handler G; Thermostat Y1 to Air Handler Y1; Thermostat Y2 to Air Handler Y2; Thermostat W1 to Air Handler W1; Thermostat W2 to Air Handler W2 (Optional). Outdoor unit connections are Y1, Y2, G, O, X2, B.

Notes for wiring diagrams: Use wirenuts for pigtail connections. Cap all unused wires. For BK enabled comfort control, do not connect Y1 or Y2 at the air handler and cut the jumper between R and BK on the control board. For systems with multiple stages of electric heat, jumper W1 and W2 together if the comfort control has only one stage of heat.

10. Air Filter

An air filter must be installed before the evaporator coil to protect internal components. Consult the filter manufacturer for proper sizing and maximum velocity requirements. Air filters must meet UL 900 test requirements.

11. Thermostat

Select a thermostat compatible with single-stage heating/cooling and electric heat. Install the thermostat on an inside wall, away from drafts, lights, or heat sources, in a location with sufficient air circulation.

12. Sequence of Operation

Cooling (Cooling only): Thermostat R-G energizes the blower via ECM control. Thermostat R-Y energizes the outdoor unit compressor and condenser fan.

Cooling (Heat pump): Thermostat R-G energizes the blower. Thermostat R-Y energizes the outdoor unit compressor and fan. Thermostat R-O energizes the reversing valve for cooling.

Heating (Heat pump): Thermostat R-G energizes the blower. Thermostat R-Y energizes the outdoor unit compressor and fan. Reversing valve is not energized for heating. If temperature drops, R-W circuit energizes electric heat contactors.

Heating (Electric heat only): Thermostat R-G energizes the blower. Thermostat R-W energizes heating contactors. Ensure thermostat is set to bring on the blower with electric heat.

Defrost: Connect the X2 (black) wire from the outdoor unit to W1 or W2 at the indoor unit for supplemental heat during defrost, preventing cold air discharge.

13. Operational and Checkout Procedures

Ensure proper performance by operating and charging the system according to the outdoor unit's Service Facts document. Review the checkout list provided in this document upon completion of installation.

14. Maintenance

Inspect, clean, or replace system air filters monthly. Ensure access panels are replaced and secured before operation. Schedule annual professional servicing, including inspection of electrical and refrigerant components, and cleaning of heat transfer surfaces. The blower motor is permanently lubricated.

Performance and Electrical Data

Air Flow Performance

The following tables detail airflow performance (CFM, Watts) for various models and settings under different external static pressures.

(a) Factory Default Setting

(a) Factory Default Setting

(a) Factory Default Setting

(a) Factory Default Setting

(a) Factory Default Setting

(a) Factory Default Setting

(a) Factory Default Setting. (b) Airflow must not exceed 1800 cfm in horizontal right, horizontal left, and downflow applications due to condensate blowoff. The 5 ton high tap shall not be used in these applications.

(a) Factory Default Setting

* = Motor Amps. (a) MCA and MOP for circuit 1 includes motor amps.

* = Motor Amps. (a) MCA and MOP for circuit 1 includes motor amps.

* = Motor Amps. (a) MCA and MOP for circuit 1 includes motor amps.

* = Motor Amps. (a) MCA and MOP for circuit 1 includes motor amps.