
BLUEFIRE HEAT PUMPS MANUAL
pag. 16 di 20
Ver.06
–
2018-05-28
11.
PCB CONNECTION DIAGRAM
N°
Simbolo
Significato
1
HI FAN
For high speed fan
2
PUMP
Flow pump (220VAC)
3
FAN
Fan motor (220VAC)
4
VAL2
System 2 4-way valve (220VAC) (not used)
5
VAL1
4-way system valve
6
COMP2
System 2 compressor (220VAC) (not used)
7
COMP1
System Compressor 1 (220VAC)
8
AC-L
Active connection
9
AC-N
Neutral connection
10
KYOUT GND
On / Off sensor
11
KYOUT GND
Output mode
12
NET GND 12V
Keyboard
13
KYIN
On / off sensor
14
MDIN
Template
15
WATER GND
Flow sensor
16
FROST GND
Defrost signal (not used)
17
SYS GND 12V
System protection
18
ROOMT
External ambient temperature
19
PIPE2
Fan circuit 2 temperature (not used)
20
PIPE1
Fan circuit 1 temperature (not used for split version)
21
OUTWT
Leaving water temperature
22
INTWT
Inlet water temperature