Inspection
When the equipment is received, the number of crates and cartons should be checked against the bill of lading for possible shortages. Any damage should be noted immediately and a report given to the carrier and the HTP factory. It is the customer's responsibility to file all freight claims with the carrier. Unit name plates should be checked to make sure voltages are in agreement with the power available.
Installation
Installation and maintenance to be performed by qualified personnel who are familiar with the local codes and regulations and who are experienced with this type of equipment.
CAUTION: Avoid contact with sharp edges and coil surfaces. They are potential hazards.
The unit must be installed level for proper drainage. This rear discharge unit draws air up through the fan blades and discharges out the coils length. Proper clearances should be maintained for proper air flow and service access to the unit as follows: 6" minimum between each coil and wall. The unit should be supported on #10 screws or 1/4" diameter bolts. To meet NSF requirements, the unit must be positioned flush with the ceiling and all gaps properly caulked.
Refrigerant Connections
Refrigerant connections should be installed in accordance with all applicable codes and using good refrigeration practices. A suction line trap must be installed prior to any risers in the suction line. Horizontal suction lines should be sloped to provide proper oil return to the compressor. Suction lines should be properly insulated to prevent sweating and higher return gas temperatures.
Drain Line
The drain line should be sharply pitched and should exit the enclosure as quickly as possible. The drain line should be insulated and sealed where it passes through the wall and trapped outside the refrigerated area and protected from freezing. In room temperatures below 34° F, the drain line should be heated and insulated.
Wiring
Wiring should be done in accordance with all national and local codes. Electric defrost units are supplied with a temperature sensing defrost termination switch which will terminate the defrost at a preset temperature. A fan delay switch is also provided to allow the coil to cool down prior to the fans turning on after defrost. The time clock should be adjusted to have a maximum of a 30 minute override to prevent overheating and steaming of the coils. The number of defrosts per day will be determined by the usage of the box and the frost buildup on the coils. On hot gas units, refer to the system manufacturer's recommendations.
Expansion Valve
Expansion valves are to be installed in accordance with the specific manufacturer's recommendations. Units that require an external equalized expansion valve must have that line connected. Proper location of the bulb is extremely important to the performance of the coil. Good thermal contact to the suction line is also essential. On solder type valves, a wet cloth wrapped around the valve during installation will protect it from overheating and damage. Superheat settings should be checked after the system has balanced out at the desired room temperature. On systems sized for a 10° to 12°F TD, the valve should be adjusted to maintain 5° to 6°F superheat. Higher TD applications will allow a higher superheat setting. On multiple evaporator systems, the piping should be arranged such that the flow from any valve cannot affect the bulb of an other.
General Maintenance
General maintenance involves an occasional cleaning of dirt accumulation on the fan, fan guard or coil. The motors are life lubricated and do not require any regular maintenance.
Diagrams
Wiring Diagram - Air Defrost (Figure 1)
Diagram shows wiring for Air Defrost models. It includes two main sections: 'WIRING WITHOUT TIMER' and '208-230 TIMER CIRCUIT'. Both sections use terminal board TB22, thermostat TSTAT, speed relay R1, and liquid line solenoid LLS. Components M1-M6 represent motors. Notes specify using copper conductors, grounding the unit, and terminal usage for Paragon Type 8145 timers. The legend defines abbreviations for terminal board (TB), heater (HTR), heater safety (HS), defrost termination & fan delay (DTFD), motors (M1, etc.), thermostat (TSTAT), liquid line solenoid (LLS), and relay (R1).
Wiring Diagram - Electric Defrost (Figure 2)
Diagram shows wiring for Electric Defrost models (208-230/50-60/1). It features terminal board TB21, heater (HTR), heater safety (HS), defrost termination & fan delay (DTFD), thermostat (TSTAT), relay (R1), and liquid line solenoid (LLS). Components M1-M6 represent motors. Notes are similar to the air defrost diagram, emphasizing copper conductors, grounding, and timer terminal usage. The legend provides definitions for the components.
Physical Dimensions (Figure 3)
Diagram illustrates the physical dimensions of the unit. Key features include 3/8 inch diameter mounting holes, 3/8 x 3/4 inch mounting slots, a 7/8 inch diameter drain, and an indicated air flow direction. The diagram shows multiple configurations or views with dimensions labeled as A, W, and specific measurements like 19-13/16 inches, 18-3/4 inches, 18-1/4 inches, 3-3/4 inches, 1-1/2 inches, 6-1/2 inches, and 9-3/16 inches. It also indicates the location of the Liquid Inlet and Suction ports. A note states all dimensions are in inches and are subject to change without notice.
Replacement Parts
ASLA/ASLE Slim-Temp Unit Coolers
| Part Number | Description |
|---|---|
| All ASLA/ASLE Models | |
| 08219328 | CNTL,DTFD,SPDT,O35/C55+O55/ C35 |
| 103079003 | CONTROL, HTR SAFETY |
| 082161211 | MOTOR, ECM, 16W, 115/230V, 2SPEED |
| 08533917 | FAN BLADE, 1028CCW-1/4 |
| 08533916 | FAN BLADE, 1028CCW-1/4 (REV) |
| 201006002 | FAN GUARD, WIRE, EPOXY COATED, 10" |
| 201006002 | FAN GUARD, WIRE, EPOXY COATED, 10" |
| ASLE Electric Defrost Models | |
| ASL25-46E | |
| 205221013 | DEFROST HEATERS, CORE, 1300 WATTS, 39" LENGTH, 230 V. |
| 20248901 | DRAIN PAN, 46" LENGTH |
| ASL35-70E | |
| 205221016 | DEFROST HEATERS, CORE, 1850 WATTS, 62" LENGTH, 230 V. |
| 20248902 | DRAIN PAN, 69" LENGTH |
| ASL45-94E | |
| 205221007 | DEFROST HEATERS, CORE, 1250 WATTS, 42" LENGTH, 230 V. (2 REQ'D) |
| 20248903 | DRAIN PAN, 92" LENGTH |
| ASL55-117E | |
| 205221010 | DEFROST HEATERS, CORE, 1600 WATTS, 54" LENGTH, 230 V. (2 REQ'D) |
| 20248904 | DRAIN PAN, 115" LENGTH |
| ASLE 25-46 | |
| 205221013 | DEFROST HEATERS, CORE, 1300 WATTS, 39" LENGTH, 230 V. |
| 202489001 | DRAIN PAN |
| ASLE 25-58 | |
| 200172026 | DEFROST HEATERS, CORE, 1970 WATTS, 48" LENGTH, 230 V. |
| 202489001 | DRAIN PAN |
| ASLE 35-70 | |
| 205221016 | DEFROST HEATERS, CORE, 1850 WATTS, 62" LENGTH, 230 V. |
| 202489002 | DRAIN PAN |
| ASLE 45-94 | |
| 205221007 | DEFROST HEATERS, CORE, 1250 WATTS, 42" LENGTH, 230 V. (2 REQ'D) |
| 202489003 | DRAIN PAN |
| ASLE55-117 | |
| 205221010 | DEFROST HEATERS, CORE, 1600 WATTS, 54" LENGTH, 230 V. (2 REQ'D) |
| 202489004 | DRAIN PAN |
To Inquire or Order Replacement Parts
Email: parts@htpg.com
Telephone: 1-855-HTPARTS (1-855-487-2787)
Fax: (256) 259-7478
- Provide the complete Model Number and Serial Number of the unit.
- Provide a detailed description of the part with any model, diameter, HP, or other markings.
- State the quantity you are ordering.
- Advise special shipping methods, routes, procedures, or instructions with ship to address.
- Provide complete and accurate data to insure prompt and accurate delivery.
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HTPG | Commercial and Industrial Refrigeration Products – HTPG (Heat Transfer Products Group)
