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Installation Guide

 | Defrost Board Replacement Kit

•   ENSURE THAT ALL POWER IS DISCONNECTED 

PRIOR TO ATTEMPTING INSTALLATION OF THIS 

HEATER KIT. THERE MAY BE MORE THAN ONE 

DISCONNECT SERVICING THE UNIT.

•   A MEANS OF STRAIN RELIEF AND CONDUCTOR 

PROTECTION MUST BE PROVIDED AT THE 

SUPPLY WIRE ENTRANCE INTO CABINET.

•   USE COPPER CONDUCTORS ONLY.

• 

 

 

INSTALLATION MUST FOLLOW NATIONAL 

ELECTRIC CODE ANDOTHER APPLICABLE 

CODES.

If this appliance is installed in an enclosed area 

such as a garage or utility room with any carbon 

monoxide producing appliance, ensure the area is 

properly ventilated.

Safety Warnings!

Defrost Board Replacement  

Kit Compatibility

Replacement Models:

NCHP-018-1019

NCHP-018-3019
NCHP-024-1019

NCHP-024-3019
NCHP-030-1019

NCHP-030-3019
NHPA-418-3019

NHPA-418-5019
NHPA-424-3019

NHPA-424-5019
NHPA-430-3019

NHPA-430-5019

ATTENTION INSTALLING PERSONNEL

HIGH VOLTAGE! 

Disconnect ALL power before servicing. 

Multiple power sources may be present. Failure to do so may 

result in property damage, personal injury or death.

!

WARNING

!

WARNING

!

WARNING

These  instructions  are  intended  as  an  aid  to  qualified,  licensed 

service personnel for proper installation, adjustment and operation of 

this unit. 

Read these instructions thoroughly before attempting 

installation or operation.

 Failure to follow these instructions may 

result in improper installation, adjustment, service or maintenance 

possibly resulting in fire, electrical shock, property damage, personal 

injury or death.

Installation and repair of this unit should be performed 

ONLY

 by 

individuals meeting the requirements of an “entry level technician” as 

specified by National Codes. Attempting to install or repair this unit 

without  such  background  may  result  in  product  damage,  personal 

injury or death.

!

CAUTION

ALL phases of this installation must comply with NATIONAL, STATE 

AND LOCAL CODES. The manufacturer assumes no responsibility for 

equipment installed in violation of any code requirements. 

Be  sure  that  the  electrical  data  specified  on  the  unit  rating  plate 

corresponds to what is available at the installation site and NEC for 

installation requirements.

Be sure that the electrical service provided to the building can handle 

the load imposed by the unit.

“USE COPPER SUPPLY WIRES ONLY”

DSHP models may require further modification

Only compatible with models that use the ICM 321 

Defrost Board.

*List is subject to change without notice.

Summary of Contents for NCHP-018-1019

Page 1: ...wner for future reference National Comfort Products A Division of National Refrigeration and Air Conditioning Products Inc 539 Dunksferry Road Bensalem PA 19020 5908 800 523 7138 Fax 215 639 1674 www...

Page 2: ...Important This document is customer property and is to remain with this unit DO NOT DESTROY OR THROW AWAY THIS MANUAL IT SHOULD BE KEPT IN A SAFE PLACE FOR FUTURE REFERENCE...

Page 3: ...placement Kit Safety Warnings Page 4 Defrost Board Replacement Kit Compatibility Page 4 Defrost Board Replacement Kit Installation Page 5 Defrost Board Wiring Diagram Page 9 Defrost Board Replacement...

Page 4: ...alified licensed service personnel for proper installation adjustment and operation of this unit Read these instructions thoroughly before attempting installation or operation Failure to follow these...

Page 5: ...panel from the cabinet 2 Disconnect all wires from the control board Remove the four fasteners securing the board to the control box and remove the board 3 Align the defrost board bracket with the fo...

Page 6: ...cover the sensor with cork tape 7 Feed the white plastic temperature sensor through the 3 8 hole on the right side of the coil Push through the grille 8 Alternatively if the model does not have a 3 8...

Page 7: ...es to the control board Refer to the wiring diagram included with the kit or on page 9 of this manual 10 Change the defrost curve setting on the control board to match your unit Refer to page 8 for de...

Page 8: ...the outdoor coil accumulates frost Each system can accumulate frost on the outdoor coil at different rates It is NECESSARY for the installer to check that the appropriate defrost curve is selected fo...

Page 9: ...TEMP SENSOR RV REVERSING VALVE 14262099 KIT 1 6 2023 JOB NUMBER DATE DRAWN BY BS WIRING DIAGRAM 14299236 CC Coil HPS LPS Defrost Board Replacement Kit C C RV CC OR Y C OCT CFM Fan OCT C NC DB FAX 215...

Page 10: ...Coil Defrost Sensor 142 60 025 4 NHPA Ambient Defrost Sensor 142 60 026 5 NHP Defrost Control Board 142 62 099 6 Defrost Board Replacement IOM 142 99 242 7 Part Bag 7x8 5 386 8 8 Wire Tie T59 033 9 Co...

Page 11: ...This Page Left Intentionally Blank...

Page 12: ...3 HEATING A C EQUIPMENT NATIONAL COMFORT PRODUCTS National Comfort Products A Division of National Refrigeration Air Conditioning Products Inc 539 Dunksferry Road Bensalem PA 19020 1 800 523 7138 Fax...

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