nVent T-Series Air Conditioner

Warranty and Return Policy

For warranty and return information, please visit: https://hoffman.nvent.com/en/hoffman/warranty-information

Important Notice

These instructions were authored in English. Instructions published in languages other than English have been translated from the authored language.

These air conditioners are intended for use by properly trained customers in industrial, communications, and agricultural environments.

Operating sound level is below 70 dBA.

Receiving the Air Conditioner

Inspect the air conditioner for concealed damage that may have occurred during shipment. Look for dents, scratches, loose assemblies, or evidence of oil. Any damage evident upon receipt should be noted on the freight bill and brought to the attention of the delivering carrier within 15 days of delivery. Save the carton and packing material and request an inspection. nVent Equipment Protection cannot accept responsibility for freight damages but will assist in any way possible.

Handling and Testing the Air Conditioner

If the air conditioner has been in a horizontal position, ensure it is placed in an upright, vertical, or mounting position for a minimum of five (5) minutes before operating.

Test for Functionality Before Mounting: Refer to the nameplate for proper electrical current requirements and connect the power cord to a properly grounded power supply. Minimum circuit ampacity should be at least 125% of the amperage shown in the design data section for the appropriate model. Do not connect other equipment to this circuit to prevent overloading.

Operate the air conditioner for five (5) to ten (10) minutes. No excessive noise or vibration should be evident. The condenser blower (ambient air), the evaporator impeller (enclosure air), and the compressor should be running. Condenser air temperatures should be warmer than normal room temperatures within a few minutes. The compressor is provided with automatic reset thermal overload protection. This thermoswitch is located inside the plastic enclosure clipped to the compressor. The switch operates when the compressor overheats due to a clogged or dirty inlet air filter, ambient air temperatures exceeding the nameplate rating, or if enclosure dissipated heat loads exceed the unit's capacity. The thermal overload switch will actuate and stop compressor operation. The blowers will continue to operate, and the compressor will restart after it has cooled within the thermal overload cut-in temperature setting.

Installation Instructions

1. Inspect the air conditioner and verify correct functionality before mounting. Refer to "Handling and Testing the Air Conditioner" on page 3.
2. Using the cutout dimensions provided (see "Mounting Cutout Dimensions" on page 6), prepare the air "IN" and air "OUT" openings, and the mounting bolt hole pattern for the enclosure.
3. Using the provided gasket kit, install gaskets to the air conditioner. Refer to "Mounting Gasket Kit" on page 7 for proper location.
4. Mount the air conditioner on the enclosure using the provided mounting bolts and screws. "EZ" mount tabs can be used to hold the unit on the enclosure while mounting. Allow the unit to remain upright for a minimum of five (5) minutes before starting. Caution! The air conditioner must be in an upright position during operation.
5. To avoid cross-threading mounting inserts, start bolts by hand before tightening with a wrench or ratchet driver.
6. When routing the drain tube, ensure it does not kink or become elevated above the exit point of the air conditioner. The drain tube must maintain a continuous downward slope. A slight elevation could result in a secondary trap. FAILURE TO FOLLOW THESE INSTRUCTIONS COULD RESULT IN OVERFLOWING OF THE CONDENSATE DRAIN PAN.
7. Refer to the top of the nameplate for electrical requirements. Connect the power cord to a properly grounded power supply. Use of an extension cord is not recommended. The electrical circuit should be fused with a slow blow or HACR circuit breaker.

Design Data

Note: XXX will be replaced with a three-digit number designating all desired options. Consult the factory for specific model numbers.

Dimensional Drawings

6K BTU Units:

• Overall Dimensions (W x H x D): 15.75 in x 43.00 in x 11.97 in
• Mounting Hole Pattern (refer to diagram for specific locations and dimensions)
• Air Inlet/Outlet locations
• Drain Location
• Power Cord and Alarm Wire access points

8-10K BTU Units:

• Overall Dimensions (W x H x D): 15.75 in x 43.00 in x 11.97 in
• Mounting Hole Pattern (refer to diagram for specific locations and dimensions)
• Air Inlet/Outlet locations
• Drain Location
• Power Cord and Alarm Wire access points

(Diagrams showing detailed measurements for both 6K BTU and 8-10K BTU units are provided in the original document.)

Mounting Cutout Dimensions

Detailed diagrams illustrate both external and internal cutout dimensions for enclosure mounting. These include precise measurements for hole placement and overall cutout size.

Mounting Gasket Kit

A mounting gasket kit (Part No. 45-1000-50) is included. Apply the gasket to the air conditioner before mounting it to the enclosure. Diagrams show the gasket placement for both external and internal mounts.

Note: Add a strip to the evap pan if internally mounted (included).

Components List (115 VOLT)

(Diagrams showing component locations for T43 115V and T43 6,000 BTU 230/460V Models are provided in the original document.)

Components List (230/460 VOLT)

(Diagrams showing component locations for T43 8,000 & 10,000 BTU 230/460V Models and T43 460V 3 PHASE Models are provided in the original document.)

Wiring Diagram and Schematic

Generic wiring diagrams and schematics are provided for various models, including:

• 115V and 6000 BTU 230V Models
• 8000 and 10000 BTU 230V Models
• 3-Phase Models

(Detailed diagrams illustrating the electrical connections and component layouts are included in the original document.)

Temperature Control

The electromechanical thermostat is factory preset to 75°F/24°C. To adjust, remove the nylon plug (if applicable) and use a screwdriver. Turning clockwise cools, counterclockwise warms. The set point is the off temperature; the on temperature is 10°F/5°C higher.

Units With Heat

The heating thermostat is factory preset to 55°F/13°C. The set point is the on temperature; the off temperature is 10°F/5°C higher.

Principles of Operation

If electrical power is interrupted and reapplied within 3-5 seconds, the compressor may not restart due to high back pressure. Allow at least one minute after shut-down for pressures to equalize before restarting.

Operating the air conditioner outside the nameplate ambient temperature range voids all warranties.

Frequent opening of the enclosure door admits humid air, which the air conditioner must dehumidify.

Maintenance

Compressor

The compressor requires no maintenance as it is hermetically sealed and factory lubricated. Do not loosen or tamper with access fittings. Breaking seals during the warranty period voids the warranty.

Inlet Air Filter

Proper maintenance of the inlet air filter ensures normal operation. Delayed or ignored maintenance reduces the maximum operating ambient temperatures. A dirty or clogged filter can cause the compressor's thermal overload to activate, stopping operation until the unit cools. It is recommended to intentionally interrupt power when this occurs. This condition indicates a clogged filter or coil, reducing cooling airflow. Do not run the unit for extended periods with the filter removed, as dust and lint can plug the condenser coil. Protect the coil with a filter.

How to Remove, Clean or Install a New Inlet Air Filter

RP aluminum washable air filters provide efficient filtering. Optimum performance is maintained by recoating after washing with RP Super Filter Coat adhesive. Clean filters regularly.

The inlet air filter is located behind the lower access cover. Pull the ring or remove the cover by unscrewing the two bottom screws. Slide the filter out.

Cleaning Instructions:

1. Flush the filter with warm water from the exhaust side to the intake side. DO NOT USE CAUSTICS.
2. Allow the filter to drain completely.
3. Recoat the filters with RP Super Filter Coat adhesive, spraying from both sides for maximum concentration.

Condenser and Evaporator Air Movers

Impeller motors require no maintenance as bearings, shafts, etc., are lubricated for life during manufacturing. If the condenser impeller motor fails, it can be replaced without removing the air conditioner from the cabinet or enclosure, as it is mounted on its own bulkhead and accessible via the lower access panel.

Refrigerant Loss

Each air conditioner is tested for leaks before leaving the factory. Shipping damage or microscopic leaks may require repair or recharging by qualified professionals. Refer to the nameplate for refrigerant type and charge size. Ensure there are no leaks and the system is properly evacuated into a deep vacuum before recharging.

Trouble Shooting

Basic Air Conditioning Trouble Shooting Check List

1. Check the manufacturer's nameplate for correct power supply.
2. Turn on power. The evaporator impeller should start. Check for airflow. If no airflow: possible open motor winding, stuck impeller motor, or obstructed wheel. Proceed to step 3.
3. Adjust thermostat to the lowest setting. Condenser impellers and compressor should start. If they do not start, suspect a defective thermostat. Proceed to step 4.
4. If both impellers and compressor are running, but the unit does not cool properly, proceed to step 5.
5. Check condenser impellers for airflow. If no airflow: possible defective thermostat, open motor winding, stuck impeller motor, or obstructed wheel. Proceed to step 6.
6. Check compressor for operation (slight vibration, warm outer case). If signs are present, wait 5 minutes and proceed to step 7. If not: possible defective thermostat, defective capacitor, defective overload, or defective relay.
7. Ensure coils are clean. Check evaporator "air in" and "air out" temperatures. If they are the same: possible loss of refrigerant or bad compressor valves. Proceed to step 8.
8. To check the thermostat: turn off power, remove the control box cover, and connect both thermostat wires to one terminal (replace cover for safety). Turn power on. If both blowers and compressor start, the thermostat needs replacement.

Symptoms and Possible Causes

For additional technical support (i.e., amp draw, pressures, temperatures), contact nVent Equipment Protection at 800-896-2665.

F-GAS INFORMATION