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REPAIR PART KIT INSTALLATION INSTRUCTIONS
REPLACEMENT DEMAND DEFROST CONTROL BOARD
FOR USE WITH MODELS: 12, 13 & 14 SEER HEAT PUMPS
INSTALLATION
1.
Power off unit totally - 240V & 24V.
2.
Carefully record positions and colors of wiring removed.
3.
Remove old defrost circuit board.
4.
Install replacement circuit board - utilizing same placement,
mounting & screws.
HEATER LIMIT SWITCH
(Not on all Units)
START RELAY
(Not on all Units)
DUAL
RUN/FAN
CAPACITOR
START
CAPACITOR
(Not on all Units)
GROUND
REVERSIBLE HIGH
LUG
VOLTAGE CONDUIT PLATE
FIGURE 1: Outdoor Unit Control Box
DEFROST CURVE SELECTION
When the control board is replaced, the jumper MUST be
placed in a numbered position. Select the proper jumper posi-
tion from Table1. If the jumper is missing or in the P posi-
tion, the replacement control will not energize the
compressor.
When the jumper position is changed, the control will not act
upon the jumper changes until the thermostat calls are de-ener-
gized or power (24 VAC) to the control is cycled.
Defrost Initiate Curves
TABLE 1:
Defrost Curve Selection
Jumper Position
14 Seer
All Other Models
Subject to change without notice. Printed in U.S.A.
Copyright © by York International Corp. 2006. All rights reserved.
Unitary
Product
Group
5.
6.
CONTACTOR
DEMAND
DEFROST CURVE
DEFROST
SELECTION JUMPER
CONTROL
BOARD
LOW
VOLTAGE
BOX
"FINGERED"
BUSHING
FIGURE 2: Demand Defrost Control Module
The control will display the active defrost curve using the X/L
terminal when the heat pump is operating in a defrost cycle that
has been forced using the TEST inputs. For instance, the X/L
output will be energized with two flashes when defrost curve 2
is active. The control only reads the jumper input when the Y
and W thermostat inputs are de-energized.
1
2, 3, 4 Ton
2.5, 3.5 Ton
All
None
5005
York
Drive
– S1-33101975102
Refer to unit Installation Manual or Table 1 below - and set
the Demand Defrost Curve Selection Jumper to the proper
position. For the new jumper setting to take effect - all 24V
power to the board must be removed and reapplied.
Complete the installation and power up the unit, re-apply-
ing both 240V & 24V.
P
1
2
3
4
X/L
R
C
Y
O
W
W1/66
REV
VALVE
2
3
None
None
TEST
PRESSURE
SWITCH
M
4
None
None
035-21270-001-A-0906
Supersedes: Nothing
Norman
OK
73069
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