HTPG HT-AT-IOM-0720A Next-Gen All Temp Low Profile Unit Coolers Instruction Manual

HTPG HT-AT-IOM-0720A Next-Gen All-Temp Low Profile Unit Coolers

Inspection

When the equipment is received, check the quantity of cartons and crates against the bill of lading. Inspect all containers for visible damage. Report any damage or shortages to the freight company immediately. It is the customer’s responsibility to file all claims with the freight company.

Installation

Installation and maintenance are to be performed by qualified personnel who are familiar with local codes and regulations. Installers should have previous experience with this type of equipment.
CAUTION: Avoid contact with sharp edges and coil surfaces. They are potential hazards. Determine the best location for the unit in the walk-in cooler or freezer. Place the unit as far as possible from any door openings. This will help to prevent warm, moist air from being drawn into the unit, reducing the potential for icing problems. Low Profile models are draw-through type units, which discharge air directly from the fan into the room. Adequate clearances should be maintained to allow for proper airflow through the unit and to allow for regular maintenance and service (See Figure 1 for recommended location guidelines).  Remove all packaging materials before the unit is raised into position. Be certain that the unit is not set on the drain fitting or refrigerant connections before installation.

The unit should be hung using 5/16-inch stainless steel rods or bolts at all hanger slots. The Unit must be positioned flush with the ceiling with any gaps properly caulked. The drain line should be pitched a minimum of 4 inches per foot to allow proper drainage and should exit the room as quickly as possible. Do not reduce the drain line size. All drain lines must be trapped outside of the enclosure where the temperature is never below 35ºF. Drain lines should run to an open drain and should never be connected directly to a sewage or waste line. Drain lines should be heated and insulated to prevent freezing.

Figure 1
Recommended Unit Cooler Locations

Wiring
All wiring must be done in compliance with local and national codes. Use only copper conductors. Electric defrost units are supplied with a defrost termination fan delay thermostat (DTFD). The thermostat terminates the defrost cycle when a fixed temperature is reached. Additionally, the fan delay function allows the warm coil to cool after a defrost cycle, before the fans turn on. A heater safety thermostat is installed to prevent heaters from overheating above 75°F. For wiring diagrams, see Figures 2 through 5.

Expansion Valve
Expansion valves should be selected and installed according to the valve manufacturer’s recommendations. All units require externally equalized expansion valves and must have the equalizer line connected. The expansion valve bulb must be insulated and securely clamped at the 4 o’clock or 8 o’clock position on a horizontal run of
the suction line. Proper location and full contact with the bulb are extremely important to the performance of the system.

New expansion valves usually need to be adjusted. Superheat settings should be checked after the system has run long enough to reach a balanced state. Low and medium-temperature systems will usually operate more efficiently with a superheat setting of 6.0ºF at design room temperature (always maintain a 20°F compressor superheat). To Obtain Evaporator Superheat:

1.  Measure the suction line temperature at the expansion valve bulb with an accurate electronic thermometer.
2. Obtain a suction pressure reading at the Schrader fitting at the evaporator suction connection.
3. Convert the pressure reading to temperature by using a temperature/ pressure conversion chart.
4. Subtract the converted temperature from the measured temperature. The resulting difference represents the evaporator, superheat. (For close-coupled systems, it may be necessary to increase the evaporator superheat to ensure the minimum acceptable superheat at the compressor.)
5. The maximum recommended evaporator TD for medium-temperature systems is 15ºF. The maximum recommended TD for low-temperature systems is 13ºF.

Evacuation
Proper installation procedures must include a deep evacuation of the system. A clean/dry system is essential when charging refrigerant.

General Maintenance

Disconnect all electrical power to the unit before inspecting or cleaning. Evaporator coils, blades and guards should be checked periodically and cleaned of all dirt or grease accumulation. Do not use ammonia or other cleaning agents that are corrosive to Copper or Aluminum. The drain pan should be lowered and thoroughly cleaned to permanently clear any drain restriction. The fan motors are permanently lubricated and do not require periodic oiling.

Optional Components – EcoNet® Enabled Unit Coolers

The award-winning EcoNet Enabled Controller and EcoNet Command Center bring easy-to-use smart technology to commercial refrigeration applications. The optional EcoNet Controller gives customers a higher level of efficiency and more control of their walk-in units for greater energy savings. The EcoNet Controller is shipped from the factory with the controller board already installed and all sensors and relays wired. The controller replaces the TXV, liquid line solenoid valve, room thermostat, time clock, and defrost termination and fan delay. Parameters are pre-selected to match equipment.

The optional EcoNet Command Center allows for EcoNet Enabled Unit Coolers to be programmed, monitored, and troubleshot outside of the space being cooled. The EcoNet Command Center is shipped loose and includes everything in the box to quickly install the device on a wall outside of the walk-in. System set-up is easy with the intuitive touchscreen installer settings. If the Next-Gen All-Temp Unit Cooler has the factory-installed EcoNet Enabled Controller (see photo below), you will need to reference the EcoNet Enabled Unit Coolers Installation and Operations Manual for further assistance.

Figure 2
Wiring Diagrams – Air Defrost Models

Figure 3
Wiring Diagram – Hot Gas Defrost

Figure 4

Wiring Diagram – Electric Defrost – 1 to 5 Fan Models

Figure 5

Wiring Diagrams – Electric Defrost – 6 Fan Models

Next-Gen All-Temp Replacement Parts

All Models or as Specified in Description
0852833601| DRAIN PAN 1 FAN, AIR DEF
0852833701| DRAIN PAN 2 FAN, AIR DEF
0852833801| DRAIN PAN 3 FAN, AIR DEF
0852833901| DRAIN PAN 4 FAN, AIR DEF
0852834001| DRAIN PAN 5 FAN, AIR DEF
0852834101| DRAIN PAN 6 FAN, AIR DEF
0852833602| DRAIN PAN 1 FAN, ELECTRIC DEF
0852833702| DRAIN PAN 2 FAN, ELECTRIC DEF
0852833802| DRAIN PAN 3 FAN, ELECTRIC DEF
0852833902| DRAIN PAN 4 FAN, ELECTRIC DEF
0852834002| DRAIN PAN 5 FAN, ELECTRIC DEF
0852834102| DRAIN PAN 6 FAN, ELECTRIC DEF
08248171| DRAIN FITTING AL
08321595| DRAIN NUT
08321596| DRAIN GASKET
08528313| VENTURI 1 FAN
08528314| VENTURI 2 FAN
08528315| VENTURI 3 FAN
08528316| VENTURI 4 FAN
08528317| VENTURI 5 FAN
08528318| VENTURI 6 FAN
08528319| END COVER DOOR

08216194

| DUAL SPEED / DUAL VOLTAGE MOTOR, EC MOTOR, 50 WATT, 1550 RPM, 115/230V, CCW ROTATION,

(Air or Electric Defrost Models)

08218183| DUAL SPEED MOTOR RELAY 120V
08218377| DUAL SPEED MOTOR RELAY 240V

08216124

| 1 speed MOTOR, ECM, 50 WATT,

1550 RPM, 115V, CCW (Hot Gas

Defrost)

08216125

| 1 speed MOTOR, ECM, 50 WATT,

1550 RPM, 230V/1, CCW (Hot Gas

Defrost)

08216155

| 2-speed MOTOR, ECM, 50 WATT,

1550 RPM, 115V, CCW (Hot Gas

Defrost)

08216156

| 2-speed MOTOR, ECM, 50 WATT,

1550 RPM, 230V/1, CCW (Hot Gas

Defrost)

08216074| MOTOR, PSC, 1/20 HP, 1550 RPM, 115V
08216073| MOTOR, PSC, 1/20 HP, 1550 RPM, 230V/1
08216135| MOTOR, PSC, 1/20 HP, 1550 RPM, 460V/1
08321627| MOTOR MOUNT, LEG, TALL (EC MOTORS)
Part Number| Description
---|---
08321628| MOTOR MOUNT, LEG, SHORT (PSC MOTORS)
08221175| FAN BLADE, 12″ DIAM., 24° PITCH,

CW (For use with EC Motors)

08221153| FAN BLADE, 12″ DIAM., 24° PITCH,

CW (For use with PSC Motors)

08321626| FAN GUARD, PLASTIC, HIGH THROW, BLACK, 12″
08219328| DEFROST TERMINATION / FAN DELAY, SPST, O35/C55
Electric Defrost Models
ModelsL6E035, L6E042, L6E049, L4E027,

L4E032, L4E038

08215200| COIL HEATER, 1F, 230V, 375 WATTS
08215206| DRAIN PAN HEATER, 1F, 230V, 375 WATTS
08215212| DRAIN PAN HEATER, 1F, 460V, 375 WATTS
Models L6E066, L6E077, L6E090, L6E105,

*L4E051, L4E064, L4E080

08215201| COIL HEATER, 2F, 230V, 750 WATTS
08215207| DRAIN PAN HEATER, 2F, 230V, 750 WATTS
08215213| DRAIN PAN HEATER, 2F, 460V, 750 WATTS
Models L6E121, L4E094, L6E142, L4E110
08215202| COIL HEATER, 3F, 230V, 1100 WATTS
08215208| DRAIN PAN HEATER, 3F, 230V, 1100 WATTS
08215214| DRAIN PAN HEATER, 3F, 460V, 1100 WATTS
Models L6E162, L4E125, L6E182, L4E141
08215203| COIL HEATER, 4F, 230V 1475 WATTS
08215209| DRAIN PAN HEATER, 4F, 230V, 1475 WATTS
08215215| DRAIN PAN HEATER, 4F, 460V, 1475 WATTS
Models L6E200, L4E155
08215204| COIL HEATER, 5F, 230V 1850 WATTS
08215210| DRAIN PAN HEATER, 5F, 230V, 1850 WATTS
08215216| DRAIN PAN HEATER, 5F, 460V, 1850 WATTS
Models L6E244, L4E195, L6E281, L4E230
08215205| COIL HEATER, 6F, 230V 2225 WATTS
08215211| DRAIN PAN HEATER, 6F, 230V, 2225 WATTS
08215217| DRAIN PAN HEATER, 6F, 460V, 2225 WATTS

Next-Gen All-Temp Replacement Parts Cont.

Hot Gas Defrost Models
Models L6G035, L6G042, LG049, L4G027,

*L4G032, L4G038, L6H035, L6H042, LH049,

*L4H027, L4H032, L4H038

08530726| DRAIN PAN HEATER, 1F, 115V, 375 WATTS
08215206| DRAIN PAN HEATER, 1F, 230V, 375 WATTS
08215212| DRAIN PAN HEATER, 1F, 460V, 375 WATTS
Models L6G066, L6G077, L6G090, L6G105,

*L4G051, L4G064, L4G080, L6H066, L6H077,

*L6H090, L6H105, L4H051, L4H064, L4H080

08530727| DRAIN PAN HEATER, 2F, 115V, 750 WATTS
08215207| DRAIN PAN HEATER, 2F, 230V, 750 WATTS
08215213| DRAIN PAN HEATER, 2F, 460V, 750 WATTS
Models L6G121, L4G094, L6G142, L4G110,

L6H121, L4H094, L6H142, L4H110

08530728| DRAIN PAN HEATER, 3F, 115V, 1100 WATTS
08215208| DRAIN PAN HEATER, 3F, 230V, 1100 WATTS
08215214| DRAIN PAN HEATER, 3F, 460V, 1100 WATTS
Part Number| Description
---|---
Models L6G162, L4G125, L6G182, L4G141,

L6H162, L4H125, L6H182, L4H141

08530729| DRAIN PAN HEATER, 4F,115V, 1475 WATTS
08215209| DRAIN PAN HEATER, 4F, 230V, 1475 WATTS
08215215| DRAIN PAN HEATER, 4F, 460V, 1475 WATTS
Models L6G200, L4G155, L6H200, L4H155
08530730| DRAIN PAN HEATER, 5F, 115V, 1850 WATTS
08215210| DRAIN PAN HEATER, 5F, 230V, 1850 WATTS
08215216| DRAIN PAN HEATER, 5F, 460V, 1850 WATTS
Models L6G244, L4G195, L6G281, L4G230,

L6H244, L4H195, L6H281, L4H230

08530731| DRAIN PAN HEATER, 6F, 115V, 2225 WATTS
08215211| DRAIN PAN HEATER, 6F, 230V, 2225 WATTS
08215217| DRAIN PAN HEATER, 6F, 460V, 2225 WATTS

Notes
Variable for brand character (R = Russell, K = Kramer, W = Witt, C = ColdZone). The Heater voltage will line up with the voltage code in the model number. Each unit will get 3 heaters (2 on the face of the coil and 1 in the drain pan). 460V units include (2) 230V face heaters wired in series. The drain pan contains a single 460V heater.

TO INQUIRE OR ORDER REPLACEMENT PARTS

Email: parts@htpg.com
Telephone: 1-855-HTPARTS
(1-855-487-2787)
Fax: 256-259-7478

1. Provide the complete Model Number and Serial Number of the unit.
2. Provide a detailed description of the part with any model, diameter, HP, or other markings.
3. State the quantity you are ordering.
4. Advise special shipping methods, routes, procedures, or instructions with the ship to address.
5. Provide complete and accurate data to ensure prompt and accurate delivery.

Due to continuing product development, specifications are subject to change without notice.
3885 Crestwood Pkwy., Ste. 500 Duluth, Georgia 30096 www.htpg.com
A member of the Rheem family of brands E-mail or call us for help: parts@htpg.com or 1-855-HTPARTS (1-855-487-2787)

References

• HTPG | Commercial and Industrial Refrigeration Products – HTPG (Heat Transfer Products Group)

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