Ducane 13HPD-018-230, Instructions Manual, Page: 23 / 24

Page 23
13HPD SERIES
DEFROST THERMOSTAT SWITCH (S6)
The defrost thermostat as illustrated in figure 1 is located on the liquid line between the CTXV and the distributor. When
defrost thermostat senses 42°F (5.5°C) or cooler, the thermostat contacts close and send a signal to the defrost control to
start the defrost timing. It also terminates defrost when the liquid line warms up to 70°F (21°C).
Table 5. Defrost Control Inputs, Outputs and Configurable Settings
Control Loca-
tion Control Label or
Description
Purpose Function
P1 TEST Test Mode See Test Mode on page 22 for further details.
P1 30, 60, 90
Defrost Temperature
Termination (Jumper) Pins
The defrost control as illustrated in figure 20 has valid selections
which are: 30, 60, and 90°F (−1, 16 and 32°C). The shunt termination
pin is factory set at 50°F (10°C). If the temperature shunt is not
installed, the default termination temperature is 90°F (32°C).
P2
W1
24VAC Thermostat Input /
Output
24VAC input/output from indoor thermostat to indoor unit.
C 24VAC Common 24VAC common
L Thermostat Service Light Thermostat service light connection.
R 24VAC 24VAC
O Thermostat Input Reversing valve solenoid.
Y1 Thermostat Input Controls the operation of the unit.
P5 DELAY Delay Mode
The defrost control has a field−selectable delay to reduce occasional
sounds that may occur while the unit is cycling in and out of the defrost
mode. When a jumper is installed on the DELAY pins, the compressor
will be cycled off for 30 seconds going in and out of the defrost mode.
Units are shipped with jumper installed on DELAY pins.
NOTE − The 30 second off cycle is NOT functional when
jumpering the TEST pins on P1.
P6 TST, PS DF, C, R, O, Y1 Factory Test Connectors Factory Use Only.
DS1 RED LED
Diagnostic LED
Valid states for defrost control’s two LEDs are OFF, ON and
FLASHING which indicate diagnostics conditions that are described
in table 4.
DS2 GREEN LED
FAN TWO CONNECTORS Condenser Fan Operation These two connections provide power for the condenser fan.
O OUT O OUT 24VAC output 24VAC output connection for reversing valve.
LO−PS LO−PS Low−Pressure Switch Not Used.
DF DF Defrost Thermostat Defrost thermostat connection points.
Y1 OUT Y1 OUT 24VAC Common Output 24VAC common output, switched for enabling compressor contactor.
HS−PS HS−PS
High−Pressure Switch
(Optional)
Not Used.
L L Service Light Output output 24VAC service light output.
24V 24V 24VAC output Not Used.