HEAT PUMP KITS AND ACCESSORIES

Litho U,S,A.

©1993 Lennox Industries Inc.

502,673M

 

Dallas,Texas

9/93

Supersedes 3/92

SOLID STATE DEFROST REPLACEMENT BOARD

INSTALLATION INSTRUCTIONS FOR SOLID STATE DEFROST REPLACEMENT BOARD

LB-83114C (61H42) USED ON HP7-1, -2, HP8, CliP9 AND CliP10 SERIES UNITS

,/SHIPPINGANDPACKING

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Package 1 of 1 contains:

1- Control board on mounting bracket

1- Defrost thermostat

1- Outdoor fan/defrost relay

8- Wires with 3/16" terminals

1- Screw

2- Wire nuts

/tNSTA_TiON:

:

1-

Turn off power supply to unit.

2-

Remove compressor

access panel and control

 

box cover.

 

A- Defrost Thermostat

3- Disconnect coil thermistor from coil return bend and air thermistor from fan section. Replace coil thermistor with provided defrost thermostat.

Secure to liquid line as close as possible to the outdoor coil.

NOTE-/tmay be necessary to remove the front corner panel for access to coil thermistor,

B-Defrost Board

4- Remove and retain screwfrom existing solid state defrost board located in control box. Note

existing wiring. See figure 1.

5- Install newcontrol board assembly using existing screw and hole.

6- Drill new hole into control panel and secure with screw provided in kit.

C-Outdoor Fan/Defrost Relay

7- Remove outdoor fan/defrost relay. Install replacement outdoor fan/defrost relay.

1- Connect one end of long wire (provided) to "HLD" terminal on the defrost board. Disconnect defrost

high pressure switch from between high pressure switch and loss of charge switch.

2-Splice remaining end of long wire to wire between high pressure switch and toss of charge

switch where high pressure switch was originally connected.

3- Connect onewire from defrost relaycoitto "OUT" terminal of defrost board.

4- Cut off terminal of remaining wire from defrost relay coil and strip wire 5/8 inch. At a convenient location, splice wire to long wire from "HLD" terminal using a wire nut.

5- Connect wire from defrost thermostat to one of the "24V" terminals on defrost board.

IMPORTANT-Make sure defrost thermostat is securely fastened to the fiquid line.

6- Cut off terminal from remaining defrost thermostat wire and strip wire 5/8 inch. Splice with one of the defrost pressure switch wires using a wire nut.

7- Locate blue transformer wire and splice with remaining defrost high pressure switch wire using a wire nut.

8- Connect the remaining existing wire to "COM" terminal on defrost board.

9- Defrost time interval can be selected to defrost every 30, 60 or 90 minutes. This is selected using the jumper on the defrost board.

10-Replace all panels and restore power to unit.

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Lennox International Inc LB-83114C, 61H42 installation instructions Solid State Defrost Replacement Board

LB-83114C, 61H42 specifications

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