Allied 4SHP16 Instrukcja instalacji - Strona 17

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Control
Control Label
Locations
or Description
P1
50, 70, 90, 100
W
C
L
P2
R
Y2
O
Y1
P3
55, 50, 45, 40
DIS-YEL
P4
AMB-BLACK
P5
DELAY
TST, PS DF, C,
P6
R, O, Y1, Y2
DS1
RED LED
DS2
GREEN LED
TWO
FAN
CONNECTORS
O OUT
O OUT
LO-PS
LO-PS
Y2 OUT
Y2 OUT
Y1 OUT
Y1 OUT
HS-PS
HS-PS
L
L
Table 5. Demand Defrost Control Inputs, Outputs and Configurable Settings
507919-01F
Purpose
Defrost Temperature
Termination Shunt
(Jumper) Pins
24VAC Thermostat Input
/ Output
24VAC Common
Thermostat Service Light
24VAC
Thermostat Input
Thermostat Input
Thermostat Input
Low Ambient Thermostat
Pins
Coil Sensor
Ambient Sensor
Delay Mode
Factory Test Connectors
Diagnostic LED
Condenser Fan Operation These two connections provide power for the condenser fan.
24 VAC output
Low-Pressure Switch
24 VAC Output
24 VAC Common Output
High-Pressure Switch
Service Light Output
Function
The demand defrost control has selections which are: 50, 70, 90, and
100°F (10, 21, 32 and 38°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).
24VAC input / output from indoor thermostat to indoor unit.
24VAC common.
Thermostat service light connection.
24VAC.
Controls the second stage operation of the unit.
Reversing valve solenoid.
Controls the operation of the unit.
Provides selection of the Y2 compressor lock-in temperature. Valid
options are 40, 45, 50 and 55 degrees Fahrenheit.
(P4-5) Ground connection for outdoor coil temperature sensor.
(P4-6) Connection for outdoor coil temperature sensor.
(P4-3) Ground connection for outdoor ambient temperature sensor.
(P4-4) Connection for outdoor ambient temperature sensor.
The demand defrost control has a field-selectable function 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 TEST pins on
P1 are jumpered.
No field use.
Demand defrost control LEDs may be OFF, ON, or FLASHING to indicate
diagnostic conditions which are described in Table 3.
24 VAC output connection for reversing valve.
When the low pressure switch trips, the demand defrost control will
cycle off the compressor, and the strike counter in the demand defrost
control will count one strike. The low pressure switch is ignored under the
following conditions:
• during the defrost cycle and 90 seconds after the termination of defrost
• when the average ambient sensor temperature is below 0°F (-18°C)
• during 90 seconds following the start of the compressor during TEST
mode.
24 VAC output for second-stage compressor solenoid.
24 VAC common output, switched for enabling compressor contactor.
When the high pressure switch trips, the demand defrost control will cycle
off the compressor, and the strike counter in the demand defrost control
will count one strike.
24VAC service light output.
Issue 1846
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