background image

nVent.com/HOFFMAN 

|

 23

MAINTENANCE 

Performing preventative maintenance (PM) helps to keep your nVent HOFFMAN AC unit operating at the highest most efficient levels. 

Maintenance should be performed at least twice a year, more frequently when in challenging conditions, such as dusty, high humidity, high 

heat, oily or corrosive environments.

Product failures due to lack of maintenance may impact warranty coverage.

Condenser and evaporator air movers (FANS) 

Fan motor requires no maintenance. All bearings, shafts, etc. are lubricated for the life of the motor during manufacturing. 

Compressor 

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

operating service. Visually inspect the compressor for proper operation, mounting, visible signs of exposure to high heat.

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 circumstance should the access fitting caps/covers be loosened, removed or tampered with unless by authorized refrigeration 

repair service personnel. 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 ambient air filter is critical to normal operation of the air conditioner. If filter maintenance is delayed or ignored, 

this can result in decreased performance and/or premature failure of the compressor and other air conditioner components.

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.

How to remove, clean or install a new inlet air filter 

Research Products (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. Since 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 up inside the front panel of the unit cover. To remove the filter, lift up to clear the support tabs, and pull out and 

down. The filter may now be cleaned or a new filter installed.

Содержание X2302

Страница 1: ...Extreme AC Air Conditioner X2302 Model Instruction Manual P N 89215748 Rev E...

Страница 2: ......

Страница 3: ...rgizing the controller 10 Control status indication 10 Displaying and changing program settings 13 To view or access the settings 13 Heat cool operating parameters 13 Alarm parameters 13 Displaying te...

Страница 4: ...ing 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...

Страница 5: ...in upright position during operation 5 To avoid cross threading mounting inserts start bolts by hand before tightening with a wrench or ratchet driver 6 Refer to the top of the nameplate for electrica...

Страница 6: ...g cutout dimensions 22 22 564 3X 48 12 95 24 3X 5 00 127 3X 10 63 270 3X 16 25 413 3X 21 25 540 3X 43 11 3X 4 58 116 3X 9 15 232 12X 31 8 20 32 516 8 40 213 80 20 89215771 Cutout Dimensions Mounting G...

Страница 7: ...nVent com HOFFMAN 7 Wire diagram 89206067 REV C...

Страница 8: ...8 nVent com HOFFMAN Schematics 89206866 REV B J3...

Страница 9: ...3016SP 89083016SP 6 Switch MALF 89096948SP 89096948SP 7 Filter Drier 52602803SP 52602803SP 8 Coil Condenser 20102001SP 20102001SP 9 Coil Evaporator 89204519SP 89204519SP 10 Controller Smart 89202719SP...

Страница 10: ...ssures 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...

Страница 11: ...on Indication Icon Status C White When operating temperature in degrees Celsius ON F White When operating temperature in degrees of Fahrenheit ON Main Field Line 1 White Display inlet temperature ON M...

Страница 12: ...12 nVent com HOFFMAN...

Страница 13: ...ain screen wait one minute with no action or Press arrow few times until ESC displays then press button to return to UoF screen From the UoF screen Press arrow few times until LOG Out message displays...

Страница 14: ...creen will be automatically revert to the main screen Note if no alarms are present then only ESC will be displayed in the folder There are seven possible alarms non latching detectable by the control...

Страница 15: ...ature data on screen There are two temperature probes in the air conditioner where one is reading the enclosure air temperature incoming to the air conditioner and other is reading the cooled air leav...

Страница 16: ...secondary units 2 The primary unit monitors the enclosure temperatures of all the units and manages the ON OFF status of cooling and heating based on the unit reporting the highest temperature 3 When...

Страница 17: ...utton to access to parameter H menu Parameter Description Available Range PS Settings Default H01 Mode SA stand alone PS primary secondary SA PS primary secondary LL lead lag H02 Device ID 1 up to 10...

Страница 18: ...conditioner unit remote communication features Air conditioners that include the optional nVent HOFFMAN network card RAC module have remote communication capabilities utilizing SNMP Modbus TCP EtherN...

Страница 19: ...west or higher number of the Comm Port To view the controller data information from the A C unit In the nVent HOFFMAN A C Monitor main screen select Single ACU Monitor tab Click on Enable Comm button...

Страница 20: ...enclosure air temperature and other temperature settings information include the unit of measure The Enable Comm text on the button now changes to Disable Comm To stop the communication click on the D...

Страница 21: ...e allows to read and write Click on Enable Comm button to communicate to the network card and read the temperature information from the controller Now the temperature settings information in the contr...

Страница 22: ...8 J1 GROUND G0 1 BLK40 POWER 24VAC G 2 WHT41 J2 NA 5V 1 NA S3 2 INLET TEMP PROBE S1 3 RED NA Y1 4 DOOR OPEN SWITCH ID1 5 WHT63 GROUND O 6 WHT RESERVED S5 7 OUTLET TEMP PROBE S2 8 RED45 NA Y2 9 MAL FUN...

Страница 23: ...e and convenience of reputable refrigeration repair service personnel for recharging the air conditioner Inlet air filter Proper maintenance of the ambient air filter is critical to normal operation o...

Страница 24: ...c 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...

Страница 25: ...cabinet and surrounding area to ensure adequate airflow to and from the unit on both the inlet and outlet air channels for the ambient and cabinet air Comments Seals Gaskets and Leaks Inspect and repa...

Страница 26: ...tage and retest or contact certified electrician Is the controller illuminated Is there correct supply voltage to controller 24 V DC Possible Causes 24 V Transformer Rectifier Check Wiring Replace con...

Страница 27: ...and wiring Clean replace filter and clean condenser coil Replace seals and gaskets on enclosure Monitor for normal operation Possible Causes Low Refrigerant Leak Check controller settings YES YES YES...

Страница 28: ...nVent com en us cooling field service request F GAS INFORMATION X230216GXXX X230226GXXX Refrigerant K hlmittel Ch odziwo R134a R134a GWP 1430 1430 Factory Charge F llmenge durch Hersteller Op ata Fab...

Отзывы: