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Silk Screen
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
CN15
20K temperature sensor (inlet water)
CN15
20K temperature sensor (outlet water)
CN15
20K temperature sensor (refrigerant liquid line)
CN16
20K temperature sensor (refrigerant vapor line)
CN16
10K temperature sensor (leaving water for the auxiliary electric heater)
CN16
20K temperature sensor (reserved)
CN8
15K temperature sensor (room) (CN5)
CN9
10K temperature sensor (room) (CN6)
CN7
Temperature sensor
CN6
Temperature sensor (CN9)
CN5
Temperature sensor (CN8)
CN20
Thermostat
CN21
Detection to welding protection for the auxiliary electric heater 1
CN22
Detection to welding protection for the auxiliary electric heater 2
CN23
Detection to welding protection for the water tank electric heater
CN24
Door-guard detection
CN25
Flow switch
CN26
Reserved
CN1
485-112V 4-pin
CN2
485-1communiction without12V 4-pin
CN3
485-2 communication without 12V 3-pin
CN4
485-2 communication with 12V 4-pin
Introduction
37
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