nVent Hoffman X2302 User manual

Extreme AC Air Conditioner
X2302 Model
Instruction Manual
P/N 

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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 HOFFMAN if further information is required.
WARRANTY AND RETURN POLICY
https://HOFFMAN.nVent.com/en/HOFFMAN/warranty-information
TABLE OF CONTENTS
Warranty and return policy...........................................................................................................................................................................3
Receiving the air conditioner ......................................................................................................................................................................4
Handling and testing the air conditioner ......................................................................................................................................................4
Installation instructions...............................................................................................................................................................................5
Dimension drawing ............................................................................................................................................................................................... 5
Mounting cutout dimensions ............................................................................................................................................................................... 6
Wire diagram.......................................................................................................................................................................................................... 7
Schematics ...........................................................................................................................................................................................................8
Technical information .................................................................................................................................................................................9
Design data ............................................................................................................................................................................................................ 9
Washdown note ....................................................................................................................................................................................................9
Component list .....................................................................................................................................................................................................9
Smart controller .......................................................................................................................................................................................10
Principles of operation ..............................................................................................................................................................................10
Overview .............................................................................................................................................................................................................. 10
Energizing 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 temperature data on screen ............................................................................................................................................................ 15
Compressor restart time delay .......................................................................................................................................................................... 15
Alarm output contact ......................................................................................................................................................................................... 15
Alarm input connection ...................................................................................................................................................................................... 15
Primary-secondary (PS) mode ........................................................................................................................................................................... 16
Connecting units together in primary/secondary mode .................................................................................................................................. 16
Connecting units together in lead/lag mode .................................................................................................................................................... 17
Air conditioner unit remote communication features ...................................................................................................................................... 18
USB communication ................................................................................................................................................................................. 18
Ethernet communication ........................................................................................................................................................................... 18
Using nVent HOFFMAN PC interface tool ......................................................................................................................................................... 19
USB communication mode ....................................................................................................................................................................... 19
USB communication mode .......................................................................................................................................................................20
Ethernet communication mode ................................................................................................................................................................ 21
Remote access control pin-out ..........................................................................................................................................................................22
Maintenance .............................................................................................................................................................................................23
Inlet air filter ........................................................................................................................................................................................................23
How to remove, clean or install a new inlet air filter ........................................................................................................................................23
Refrigerant loss ...................................................................................................................................................................................................24
Preventive Maintenance/Inspection ..................................................................................................................................................................25
Trouble shooting .......................................................................................................................................................................................26
F-GAS information.....................................................................................................................................................................................28

4 | nVent.com/HOFFMAN
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.

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INSTALLATION INSTRUCTIONS
1. Inspect air conditioner and verify functionality before mounting the air conditioner, “HANDLING AND TESTING THE AIR CONDITIONER”
see on page 4.
2. Using the cutout dimensions shown in this manual, prepare the air conditioner opening, and mounting bolt hole pattern for the enclosure.
See “Mounting Cutout Dimensions” on page 6for proper location.
3. Using the gasket kit provided, install gaskets to the enclosure using the cutout and bolt hole pattern as a guide.
4. Mount air conditioner on enclosure using mounting bolts and washers provided to secure unit to enclosure. Torque bolts to 22.5in-lb
(2.5Nm). 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. 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 electrical requirements. Connect power from 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.
7. When the unit is equipped with an automatic temperature controller, the controller is preset at the factory for your convenience and should
not require adjustment.
Dimension drawing
10.23
260
22.32
567
13.64
346
4.49
114
5.08
129
3X
.57
15
5X
.54
14
1.59
40
6.50
165
7.56
192
1.04
27
6.00
152
12X 1/4-20
3.78
96
1.26
32
11.41
290
.48
12
89215771
Condensate
Drain
View of Underside of Unit
Ambient Air In
Cleanable, Reusable
Aluminum Inlet Filter
Mounting Holes
Power In
Enclosure Air In
Cool Air Out
Warm
Air Out
Terminal Block (Power
connections behind
removeable cover)

6 | nVent.com/HOFFMAN
Mounting 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 Gasket Adheres to Enclosure

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Wire diagram
89206067 REV.C

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Schematics
89206866 REV.B
J3

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COMPONENT LIST
1
2
4
5
6
7
8
9
10
11
12
13
14
15
16
17
3
**
** MOUNTING GASKET NOT SHOWN
Reference Part description 115 V 230 V
1Fan, Condenser 89206390SP 89206391SP
2Filter, Air 89203781SP 89203781SP
3Compressor 89109026SP 89108369SP
4Overload, Compressor Thermal 89109877SP 89109878SP
5Switch, HPC 89083016SP 89083016SP
6Switch, MALF 89096948SP 89096948SP
7Filter Drier 52602803SP 52602803SP
8Coil, Condenser 20102001SP 20102001SP
9Coil, Evaporator 89204519SP 89204519SP
10 Controller, Smart 89202719SP 89202719SP
11 Relay, Cooling 10100535SP 10100534SP
12 Capacitor, Compressor 89107709SP 89106525SP
13 Fan, Evaporator 12101201SP 12101202SP
14 Capacitor, Condenser Fan 52603215SP 52603214SP
15 Transformer, Control 10100694SP 10100693SP
16 Heater, 350 W (Optional) 89206006SP 89206007SP
17 Gasket, Mounting 89202697SP 89202697SP

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TECHNICAL INFORMATION
Design data
Model Voltage Hz Phase
Full Load
Cooling
Amps
Full Load
Heating
Amps
BTU/Hr @ Max
Ambient
Temperature
Max Amb
Temperature
°F/°C
Shipping
Weight
lb./kg
X230216GXXX 110/115 50/60 1 6.8/6.3 3.3/3.5 2100/2300 131/55 60/27
X230226GXXX 220/230 50/60 1 2.8/2.9 1.7/1.8 1760/1890 131/55 60/27
-XXX will be replaced with a three-digit number designating all desired options. Consult the factory for specific model numbers.
WASHDOWN NOTE
Testing has confirmed that with the cover in place the X2302 Air Conditioner will successfully withstand a clean water washdown procedure
while the unit is energized. If the washdown procedure is performed with the cover removed the unit must first be de-energized, and must be
allowed to dry completely before the cover is reinstalled and power is reapplied.
SMART CONTROLLER
• All Model X2302X6Air Conditioners are equipped with a Smart Controller.
• A Remote Access Control (RAC) optional accessory is available. The RAC can be ordered along with the X2302X6, or if desired, it can be
ordered separately as an upgrade at some later date. The RAC is packaged and shipped separately from the air conditioner since it cannot
fit inside the unit. The RAC is field installable.
PRINCIPLES OF OPERATION
• If electrical power to the air conditioner is interrupted and reapplied immediately (within 3to 5seconds), 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.
Overview
The smart controller is a parametric controller for the complete management of air conditioners. All settings are pre-programmed at the
factory. Cooling/heating setpoint, cooling/heating differential and high/low temperature setpoint are designed to be adjustable by the
operator. All alarms are outputted through the alarm relay. See “AIR CONDITIONER UNIT REMOTE COMMUNICATION FEATURES” on page 18
for remote input and output capabilities.
Energizing the controller
The digital controller is wired and programmed at the factory to operate when power is applied to the air conditioner. In normal condition, the
evap fan starts operating after the completion of the self-evaluation which is less than 30 seconds and fan icon should be illuminated along
with the inlet and outlet temperature data (if an option outlet temperature sensor is installed).
Control status indication
The display has numerous symbols to indicate the various controller functions such as cooling, heating, alarming, evaporator fan, and
heating. Indicators (icons) are steady illuminated on screen when active.
Figure 1Display