York S1-33101975102 User Manual
REPAIR PART KIT INSTALLATION INSTRUCTIONS
REPLACEMENT DEMAND DEFROST CONTROL BOARD – S1-33101975102
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
LUG
REVERSIBLE HIGH
VOLTAGE CONDUIT PLATE
CONTACTOR
DEFROST
CONTROL
BOARD
LOW
VOLTAGE
BOX
“FINGERED”
BUSHING
5. 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.
6. Complete the installation and power up the unit, re-applying both 240V & 24V.
DEMAND
DEFROST CURVE
SELECTION JUMPER
X/L
R
C
Y
O
W
W1/66
X/L
R
C
Y
O
W
W1/66
P
1
2
3
4
REV
VALV E
TEST
PRESSURE
SWITCH
COIL
M
AMBIENT
COIL G
AMBG
COND
HIGH VOLTAGE
FAN
FIGURE 1: Outdoor Unit Control Box FIGURE 2: Demand Defrost Control Module
DEFROST CURVE SELECTION
When the control board is replaced, the jumper MUST be
placed in a numbered position. Select the proper jumper position from Table1. If the jumper is missing or in the P po si-
tion, the replacement control will not energize the
compressor.
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.
When the jumper position is changed, the control will not act
upon the jumper changes until the thermostat calls are de-energized or power (24 VAC) to the control is cycled.
T ABLE 1: Defrost Initiate Curves
Defrost Curve Selection
Jumper Position
1234
14 Seer 2, 3, 4 Ton 2.5, 3.5 Ton None None
All Other Models All None None None
Subject to change without notice. Printed in U.S.A. 035-21270-001-A-0906
Copyright © by York International Corp. 2006. All rights reserved. Supersedes: Nothing
Unitary 5005 Norman
Product York OK
Group Drive 73069
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