T150116G120 - Air Conditioning Hoffman - Free user manual and instructions

Product Type	Air Conditioner (T-Series)
Model	T150116G120
Brand	Hoffman
Cooling Capacity	800 BTU/hr
Voltage / Frequency	115V AC, 60Hz
Phase	Single Phase
Full Load Amps	3.6A
Maximum Ambient Temperature	55°C (131°F)
Refrigerant Type	R134a
Refrigerant Charge	113 grams
GWP	1430
CO₂ Equivalent	0.16 tons
Shipping Weight	27 lb (12.3 kg)
Thermostat	Electromechanical, adjustable, range 50-95°F, preset 75°F
Air Filter	Reusable aluminum, washable
Protection	Compressor thermal overload with automatic reset
Mounting	Enclosure mount, external or internal
Drainage	Continuous slope drain tube required
Application	Industrial enclosure cooling
Warranty	See manual for details; damage during shipping must be reported within 15 days

Frequently Asked Questions - T150116G120 Hoffman

What should I do if the air conditioner has been shipped horizontally?

If the unit has been in a horizontal position, place it upright for at least 5 minutes before operating. Operating the compressor horizontally can cause permanent damage due to oil displacement.

How do I test the air conditioner before mounting?

Connect the power cord to a properly grounded supply matching nameplate ratings. Run the unit for 5-10 minutes. Verify that both fans (condenser and evaporator) and the compressor are running. Condenser air should become warm. If not, check thermostat setting and power.

How do I adjust the temperature setting?

Remove the nylon plug on the front face. Use a standard screwdriver to turn the thermostat clockwise for cooler or counterclockwise for warmer. The preset is 75°F and the range is 50-95°F. The differential is 6°F.

How often should I clean the air filter?

Clean the reusable aluminum filter regularly, especially if cooling performance decreases. To remove the filter, pull the ring at the bottom of the front cover. Rinse with warm water (no caustics), let dry, then recoat with RP Super Filter Coat adhesive.

What happens if the compressor stops due to overload?

The compressor has an automatic reset thermal overload switch. It will stop if the compressor overheats (e.g., dirty filter, high ambient temperature). The blowers continue running; the compressor restarts after cooling. Check for causes like clogged filter or coil.

Can I use an extension cord?

No, extension cords are not recommended. The unit should be connected directly to a properly grounded power supply with a slow blow or HACR circuit breaker. The circuit ampacity should be at least 125% of the rated amperage.

What refrigerant does the T150116G120 use?

The unit uses R134a refrigerant with a GWP of 1430. The factory charge is 113 grams (for the 115V model), giving a CO₂ equivalent of 0.16 tons.

Why is water coming from the drain tube continuously?

Continuous water flow indicates that ambient air is entering the enclosure, carrying humidity. This can happen if the enclosure door is frequently opened or if the seal is compromised. Ensure the drain tube has a continuous downward slope without kinks.

What should I check if the unit blows circuit breakers?

Possible causes: undersized breaker or fuse (not time-delay type), or a short circuit in the system. Verify that the breaker/fuse is rated for at least 125% of full load amps. Also check for damaged wiring or components.

Where can I find spare parts?

The manual includes a components list with part numbers for fans, capacitors, coils, compressor, filter, etc. Contact nVent Equipment Protection at 800-896-2665 for orders and technical support.

USER MANUAL T150116G120 Hoffman

Exterior view of a gray industrial air conditioner unit with ventilation grilles and two side slats (no text or symbols visible)

T-SERIES

AIR CONDITIONER

T15 MODEL

INSTRUCTION MANUAL

TABLE OF CONTENTS

Warranty and Return Policy....2

RECEIVING THE AIR CONDITIONER....3

HANDLING AND TESTING THE AIR CONDITIONER....3

INSTALLATION INSTRUCTIONS 4

Design Data 4

Dimensional Drawing 4

Mounting Cutout Dimensions....5

Components List 5

Wire Diagrams....6

Without Heat 6

With Heat 7

Schematics 8

TEMPERATURE CONTROL 9

Units With heat....9

PRINCIPLES OF OPERATION 9

MAINTENANCE....10

Compressor....10

Inlet Air Filter 10

How To Remove, Clean or Install a New Inlet Air Filter 10

Condenser and Evaporator Air Movers 11

Refrigerant Loss....11

TROUBLE SHOOTING 12

Basic Air Conditioning Trouble Shooting Check List....12

Symptoms and Possible Causes: 13

F-GAS INFORMATION....13

NOTE: Some of the information in this manual may not apply if a special unit was ordered. If additional drawings for a special unit are necessary, they have been inserted. Contact nVent Equipment Protection if further information is required.

WARRANTY AND RETURN POLICY

https://hoffman.nvent.com/en/hoffman/warranty-information

RECEIVING THE AIR CONDITIONER

Inspect the air conditioner. Check for concealed damage that may have occurred during shipment. Look for dents, scratches, loose assemblies, evidence of oil, etc. Damage evident upon receipt should be noted on the freight bill. Damage should be brought to the attention of the delivering carrier – NOT to nVent Equipment Protection – within 15 days of delivery. Save the carton and packing material and request an inspection. Then file a claim with the delivering carrier.

nVent Equipment Protection cannot accept responsibility for freight damages; however, we will assist you in any way possible.

HANDLING AND TESTING THE AIR CONDITIONER

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

CAUTION

Do not attempt to operate the air conditioner while it is horizontal or on its side, back or front. The refrigeration compressor is filled with lubricating oil. This will cause permanent damage to the air conditioner and also voids the warranty.

TEST FOR FUNCTIONALITY BEFORE MOUNTING THE AIR CONDITIONER TO THE ENCLOSURE.

Refer to the nameplate for proper electrical current requirements, and then 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. No other equipment should be connected 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 during this run period. The condenser blower (ambient air), the evaporator blower (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 thermo-switch is located and mounted inside the plastic enclosure clipped to the compressor. The switch operates when the compressor overheats due to clogged or dirty inlet air filter or if ambient air temperatures exceed nameplate rating or if enclosure dissipated heat loads exceed the rated capacity of the air conditioner. 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 to within the thermal overload cut-in temperature setting.

INSTALLATION INSTRUCTIONS

1. Inspect the air conditioner and verify correct functionality before mounting the air conditioner. See HANDLING AND TESTING THE AIR CONDITIONER on page 3.
2. Using the cutout dimensions shown page 5 in this manual, prepare the air "IN" and air "OUT" openings, and mounting bolt hole pattern for the enclosure.
3. Using the gasket kit provided, install gaskets to air conditioner.
4. Mount air conditioner on enclosure using mounting bolts and screws provided. "EZ" mount tabs can be used to hold unit on enclosure while mounting in place. Allow unit to remain upright for a minimum of five (5) minutes before starting. Caution! Air conditioner must be in upright position during operation.
5. When routing the drain tube, caution should be taken to keep it from kinking or being elevated above the exit point of the air conditioner. The drain tube must be on a continuous downward slope. A slight elevation of the tube could result in secondary trap. FAILURE TO FOLLOW THESE INSTRUCTIONS COULD RESULT IN OVERFLOWING OF THE CONDENSATE DRAIN PAN.
6. Refer to top of nameplate for electrical requirements. Connect the power cord to a properly grounded power supply. Use of an extension cord is not recommended. Electrical circuit should be fused with slow blow or HACR circuit breaker.

DESIGN DATA

Model Voltage Hz		Full Load Amps	Phase	BTU/Hr. @ Max Ambient Temperature	Max Ambient Temperature (°F/°C)	Shipping Weight (lb./kg)
T150116GXXX 115	60 3.6 1 800	31/55 27/12.3
T150116GXXX 100	50 3.8 1 800	25/52 27/12.3
T150126GXXX 230	60 1.5 1 900	31/55 27/12.3
T150126GXXX 220	50 1.4 1 800	25/52 27/12.3

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

DIMENSIONAL DRAWING

MOUNTING CUTOUT DIMENSIONS

Externally Mounted Internally Mounted
Cutout Instructions (As viewed from outside of enclosure)
NOTE: Phantom lines represent air conditioner.

COMPONENTS LIST

Part Description	Part Number
	115V 230V
Fan, Condenser 12-1012-01 12-1012-02
Fan, Evaporator 13-1015-01 13-1015-02
Capacitor, Compressor 52-6032-09 52-6032-10
Coil, Condenser 15-1001-02 15-1001-02
Coil, Condenser, Coated 15-1001-01 15-1001-01
Coil, Evaporator 15-1001-03 15-1001-03
Compressor 10-1016-82 10-1026-101
Filter, Air, Reusable 89057626 89057626
Filter/Dryer 52-6028-03 52-6028-03
Freeze stat 10-1033-26 10-1033-26
Service Cord 52-6035-140	52-6035-141
Terminal Block	10-1003-03 10-1003-03
Thermal Overload, Compressor	10-1007-67 10-1007-68
Thermostat, SPST, 55-100F	10-1061-16 10-1061-16
Optional Heater 10-2004-23 10-2004-24
Optional Malf Switch	52-6104-42 52-6104-42

WIRE DIAGRAMS

WITHOUT HEAT

graph TD
    A["CONDenser FAN"] --> B["BLK1"]
    A --> C["BLK12"]
    A --> D["O.L"]
    A --> E["C S R"]
    A --> F["RED2"]
    A --> G["COMPRESSOR"]
    H["EVAPORATOR FAN"] --> I["BLK6"]
    J["SERVICE CORD"] --> K["BLU"]
    J --> L["GRN/YEL"]
    J --> M["BRN"]
    N["T-BLK"] --> O["BLK1"]
    N --> P["BLK8"]
    Q["BLK6"] --> R["F-STAT"]
    S["BLK9"] --> T["T-STAT"]
    U["BLK1"] --> V["SUPPRESSOR"]
    W["WHT4 RUN CAP."] --> X["YEL3"]
    Y["RED2 RED2"] --> Z["VHT5"]
    AA["VHT4"] --> AB["WHT7"]
    AC["YEL9 BLK6"] --> AD["BLK"]
    AE["BLK1"] --> AF["BLK1"]
    AG["BLK8"] --> AH["BLK"]
    AI["BLK6"] --> AJ["F-STAT"]
    AK["BLK1"] --> AL["T-STAT"]
    AM["BLK1"] --> AN["SUPPRESSOR"]

WITH HEAT

SCHEMATICS

With Heat Without Heat

TEMPERATURE CONTROL

The electromechanical thermostat is factory preset to 75 F/23 C. To change the temperature setting, remove the nylon plug from the front face of the unit. Use a standard screwdriver to adjust thermostat. For cooler temperatures turn clockwise, for warmer temperatures turn counterclockwise. Setpoint differential is 6 F.

UNITS WITH HEAT

With a dial setting of 75 F, heat will turn on @ 70 F and turn off @ 75 F. Cooling will turn on @ 85 F and turn off at 80 F.

There is a 10 F difference between the heater off setpoint and cooling on setpoint to prevent both from operating at the same time.

The dial range of the thermostat is 50-95 F.

PRINCIPLES OF OPERATION

If electrical power to the air conditioner is interrupted and reapplied immediately, (within 3 to 5 seconds), the compressor may not restart due to the high back pressure of the compressor. It takes a minimum of one (1) minute after shut-down for the compressor suction and discharge pressures to equalize in order for the air conditioner to restart.

Operating the air conditioner below the minimum ambient temperature or above the maximum ambient temperatures indicated on the nameplate voids all warranties.

It is recommended that the warranty section of this manual be read in order to familiarize yourself with parameters of restricted operation.

The moisture that the enclosure air can contain is limited. If moisture flows from the drain tube continuously this can only mean that ambient air is entering the enclosure. Be aware that frequent opening of the enclosure's door admits humid air, which the air conditioner must then dehumidify.

Units with the optional malfunction switch have a normally open connection between the red & yellow wires and normally closed with the red and blue wires. During alarm the red and yellow wires will be closed and the blue and red wires will be open.

Maximum electrical ratings for the switch are 13A for 120 VAC and 10A for 240 VAC.

MAINTENANCE

COMPRESSOR

The compressor requires no maintenance. It is hermetically sealed, properly lubricated at the factory and should provide years of satisfactory operating service.

Should the refrigerant charge be lost, recharging ports (access fittings) on the suction and discharge sides of the compressor are provided for recharging and/or checking suction and discharge pressures.

Under no circumstances should the access fitting covers be loosened, removed or tampered with.

Breaking of seals on compressor access fittings during warranty period will void warranty on hermetic system.

Recharging ports are provided for the ease and convenience of reputable refrigeration repair service personnel for recharging the air conditioner.

INLET AIR FILTER

Proper maintenance of the inlet air filter, located behind the front cover, will assure normal operation of the air conditioner. If filter maintenance is delayed or ignored, the maximum ambient temperatures under which the unit is designed to operate will be decreased.

If the compressor's operating temperature increases above designed conditions due to a dirty or clogged filter (or plugged condenser coil), the air conditioner's compressor will stop operating due to actuation of the thermal overload cut-out switch located on the compressor housing. As soon as the compressor temperature has dropped to within the switch's cut-in setting, the compressor will restart automatically. However, the above condition will continue to take place until the filter or coil has been cleaned. It is recommended that power to the air conditioner be interrupted intentionally when abnormally high compressor operating temperature causes automatic shut-down of the unit. The above described shutdown is symptomatic of a clogged or dirty filter, thus causing a reduction in cooling air flow across the surface of the compressor and condenser coil.

Do not run the air conditioner for extended periods of time with the filter removed. Particles of dust, lint, etc., can plug the fins of the condenser coil which will give the same reaction as a plugged filter. The condenser coil is not visible through the filter opening, so protect it with a filter.

Continued operation under the above conditions can and will damage and shorten compressor life. The air conditioner is available with an easily removable inlet filter to facilitate necessary cleaning. There should be no reason to neglect this necessary maintenance.

HOW TO REMOVE, CLEAN OR INSTALL A NEW INLET AIR FILTER

RP aluminum washable air filters are designed to provide excellent filtering efficiency with a high dust holding capacity and a minimum amount of resistance to air flow. Because they are constructed entirely of aluminum they are lightweight and easy to service. Optimum filter performance is maintained by recoating the filters after washing with RP Super Filter Coat adhesive. To achieve maximum performance from your air handling equipment, air filters should be cleaned on a regular basis.

The inlet air filter is located behind the front cover. To access filter, pull ring protruding from slot in bottom of front cover. The filter may now be cleaned or new filter installed.

Cleaning Instructions:

1. Flush the filter with warm water from the exhaust side to the intake side. DO NOT USE CAUSTICS.
2. After flushing, allow filter to drain. Placing it with a corner down will assure complete drainage.
3. Recoat the filters with RP Super Filter Coat adhesive. When spraying filter do so from both sides for maximum concentration of adhesive.

CONDENSER AND EVAPORATOR AIR MOVERS

Fan motors require no maintenance. All bearings, shafts, etc. are lubricated during manufacturing for the life of the fan.

CAUTION

Operation of the air conditioner in areas containing airborne caustics or chemicals can rapidly deteriorate filters, condenser coils, blowers and motors, etc. Contact nVent Equipment Protection for special recommendations.

REFRIGERANT LOSS

Each air conditioner is thoroughly tested prior to leaving the factory to insure against refrigeration leaks. Shipping damage or microscopic leaks not found with sensitive electronic refrigerant leak detection equipment during manufacture may require repair or recharging of the system. This work should only be performed by qualified professionals, generally available through a local, reputable air conditioning repair or service company.

Refer to the data on the nameplate which specifies the type of refrigerant and the charge size in ounces.

Before recharging, make sure there are no leaks and that the system has been properly evacuated into a deep vacuum.

TROUBLE SHOOTING

BASIC AIR CONDITIONING TROUBLE SHOOTING CHECK LIST

1. Check manufacturer's nameplate located on the unit for correct power supply.
2. Turn on power to the unit. The evaporator (Enclosure or "COLD" air) fan should come on. Is there airflow?

YES, proceed to step 3.

NO, possible problem:

• Open motor winding
• Stuck fan motor
• Obstructed blades

Repair or Replace defective part

1. Check thermostat setting and adjust thermostat to the lowest setting. This should turn the condenser fan and the compressor on. Did condenser fan and compressor come on when the thermostat was turned on?

YES, proceed to step 4.

NO, possible problem:

• Defective thermostat

1. Are both fans and the compressor running? If not the unit will not cool properly.
2. Check condenser (Ambient or "HOT" air) fan for airflow. Is there airflow?

YES, proceed to step 6.

NO, possible problem:

• Defective thermostat
- Open motor winding
- Stuck fan motor
- Obstructed blades

Repair or Replace defective part

1. Carefully check the compressor for operation - motor should cause slight vibration, and the outer case of the compressor should be warm. Is the compressor showing signs of this?

YES, wait 5 minutes, then proceed to step 7.

NO, possible problem:

• Defective thermostat
- Defective capacitor
- Defective overload
- Defective relay

Repair or Replace defective part

1. Make sure the coils are clean. Then check evaporator "air in" and "air out" temperatures. If the temperatures are the same:

1. To check for a bad thermostat, turn power to the unit off. Remove the control box cover and place both thermostat wires onto one terminal (replace control box cover for safety). This will activate the switch in the thermostat. Turn the power on and if both fans and the compressor come on, the thermostat needs to be replaced.

SYMPTOMS AND POSSIBLE CAUSES:

SYMPTOM POSSIBLE CAUSE
Unit won't cool	Clogged fins on coil(s)
	Dirty filter
	fans not running
	Compressor not running
	Compressor runs, but has bad valves
	Loss of refrigerant
Compressor tries to start but won't run	Low line voltage at start. Should be +/-10% rated voltage.
	Compressor motor stuck
	Bad contactor
	Bad overload switch
	Bad run/start capacitor
Unit blows breakers	Undersized breaker/fuse or not time delayed
	Short in system
Getting water in enclosure	Drain plugged
	Drain tube kinked
	Enclosure not sealed (allowing humidity in)
	Mounting gasket damaged

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

F-GAS INFORMATION

	T150116GXXX T150126GXXX
RefrigerantKühlmittelChłodziwo	R134a R134a
GWP	1430 1430
Factory ChargeFüllmenge durch HerstellerOpłata Fabryczna	113 Grams113 Gramm113 Gramów	107 Grams107 Gramm107 Gramów
CO_2 Equivalent CO_2 Equivalent CO_2 Ekwilalent	0.16 Tons0,16 Tonnen0,16 Tony	0.15 Tons0,15 Tonnen0,15 Tony

NOTES

NOTES