Hoffman T20 Handleiding

Hoffman Airco T20

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Pagina 1/16

Rev. E

P/N 89114993

T-SERIES

Air Conditioner

t20 Model

INSTRUCTION MANUAL

89114993

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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

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 to be used by properly trained customers in industrial, communications and

agricultural environments.

• Operating sound level is below 70 dBA.

Disconnect the power source from

the air conditioner before servicing.

WARNING

TABLE OF CONTENTS

Warranty and Return Policy .............................................................................................................................................................2

IMPORTANT NOTICE .......................................................................................................................................................................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

Schematic .......................................................................................................................................................................................................8

TEMPERATURE CONTROL ..............................................................................................................................................................9

Units With heat ................................................................................................................................................................................................9

General Information ................................................................................................................................................................................9

Example ...................................................................................................................................................................................................9

To change the temperature setting of the thermostat ........................................................................................................................9

Dial ranges ...............................................................................................................................................................................................9

Testing thermostat calibration ..............................................................................................................................................................9

PRINCIPLES OF OPERATION ....................................................................................................................................................... 10

MAINTENANCE 10 .............................................................................................................................................................................

Compressor 10 ...................................................................................................................................................................................................

Inlet Air Filter .................................................................................................................................................................................................10

How To Remove, Clean or Install a New Inlet Air Filter .............................................................................................................................11

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

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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 le 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 ve (5) minutes before operating.

Do not attempt to operate the air conditioner while it is horizontal

or on its side, back or front. The refrigeration compressor is lled

with lubricating oil. This will cause permanent damage to the air

conditioner and also voids the warranty.

CAUTION

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

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 ve (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 lter 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.

Product specificaties

Merk:	Hoffman
Categorie:	Airco
Model:	T20
Kleur van het product:	Roestvrijstaal
Gewicht:	25000 g
Breedte:	254 mm
Diepte:	251 mm
Hoogte:	508 mm
Geluidsniveau:	66 dB
Soort:	Mobiele airconditioner uit één stuk
Materiaal behuizing:	Metaal
Stroom:	19 A
Koelend medium:	R134A
Certificering:	UL/cUL, CE, EAC,
Air conditioner functies:	Koeling
Jaarlijks energieverbruik (koelen):	- kWu
Koelcapaciteit in watt (opgegeven):	586 W
Energieverbruik per uur (koeling):	- kWu
Energieverbruik per uur (verwarming):	- kWu
Luchtstroom (hoge snelheid):	280 m³/uur
Luchtstroom (lage snelheid):	131 m³/uur
Koelcapaciteit (max):	2000 BTU/h
Koel capaciteit in watt (max):	645 W
Verwarmingscapaciteit in watt (max):	- W
Verwarmingscapaciteit in watt (opgegeven):	- W
AC-ingangsspanning:	115 V
AC-ingangsfrequentie:	50 - 60 Hz
Koelkast medium gewicht:	184 g
Koelcapaciteit in watt (min):	528 W
Koelcapaciteit (min):	1800 BTU/h
Stroomsterkte (koeling):	7 A
Vermogens consumptie (koeling):	805 W