29
Air-to-water Heat Pump
16. Wring Diagram
16.1 Control Board
(1)
GRS-CQ4.0Pd/NhG-K, GRS-CQ6.0Pd/NhG-K, GRS-CQ8.0Pd/NhG-K
Silk Screen
Introduction
AC-L
Live wire of power supply
N
Neutral wire of power supply
X3
To the ground
X20
E-heater of water tank
X21
E-heater 1
X22
E-heater 2
X23
Assistant heat by 220VAC
X24
Reserved
X25
Electric heater for the plate-type heat exchanger
X26
Reserved
X27
Electric magnetic 2-way valve 1 is normally open
X28
Electric magnetic 2-way valve 1 is normally closed
X29
High-power load control
X30
High-power load control
X31
Electric magnetic 3-way valve 1 is normally open (reserved)
X32
Electric magnetic 3-way valve 1 is normally closed (reserved)
X33
Electric magnetic 3-way valve 2 is normally open (water tank)
X34
Electric magnetic 3-way valve 2 is normally closed (water tank)
CN30
Signals 1, 2, 3, 4, power supply 5
CN31
Signals 1, 2, 3, 4, power supply 5
CN18
Interface to the variable-frequency water pump
CN19
Interface to the variable-frequency water pump
SPLIT TYPE