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121
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W
ATER TEMPER
ATURE
NT
C
to
M12
cPHC_1
FILL SOLENOID
VA
LV
E
NT
C 1
FL
UE GASES
BL
UE
WHITE
RED
YELL
OW
GREEN
+15 V
ac
LO
W_L
ev
el
MIDDLE_L
ev
el
HIGH_L
ev
el
GND
LE
VEL SENSOR 2
cPHC_2
BO
TT
OM BO
ARD
RELA
Y BA
CK/RO
TA
TION
CONTROL SENSOR
GND
+12V
BA
CK
HI LIMIT SENSOR
GND
EX
TERNAL
SIGNAL
to
displa
y pGD
FB2
RD
USB
FERRITE
REMO
TE
ON/OFF
ST
ATUS
RELA
Y
ALARM
RELA
Y
ANAL
OG OUTPUT
ETHERNET
M2
M8
M12
M1
M5
J24
J20
J23
M3
J16
J17L
J17C
J3
M6
M9
9U
10U
1U
2U
3U
4U
5U
6U
7U
8U
11U
12U
13U
14U
G0 –
G +
7O
8O
9O
1
2
1
2
1
2
1
2
1
2
3
4
5
6
1
2
3
4
5
1
2
12S
11S
10S
9S
8S
12T
13T
5S
6S
1S
2S
3S
4S
+12 V
dc
LO
W_L
ev
el
MIDDLE_L
ev
el
HIGH_L
ev
el
GND
1
2
1
2
1
2
1
2
1
2
1
2
3
3 2 1
1
2
3
4
5
6
7
8
32
1
LE
VEL SENSOR
FO
AM
SENSOR
CONDUCIBILIT
Y
SENSOR
TOP BO
ARD
G
RF2
RF1
1
2
3
1
2
1
2
3
4
0 24 V
V1 V2
1
2
3
4
1
2
3
4
1
2
1
2
3
4
1
2
10T
11T
1
2
3
2
1
2
1
J14
J22
J8
J2
J1
J11
J6L
J6C
J7
J5
J15
J4
G
G
G0
G0
G
G0
G0
TO CLIP 5Z - 5T
TO
CLIP
J11.
2
SHILDING
1T
2T
+
–
3T
TA
CH
PWM
4T
5T
6T
8T
P
P
FB1
9T
8T
9T
7T
6T
7T
BL
OWER 3
FENW
ALL3
CONTROL BO
ARD
KLIX
ON 3
TO
GAS
VA
LV
E
0
TO CLIP 4Y
6Y
TO CLIP 5Y
230
GND
0V BLOWER1
230 V
TR
0 V
75 V
A
FB1
FB2
RD
1O
2O
F3
GND
DR
AIN PU
MP
230 V
ac
DR
AIN
TEMPERING
VA
LV
E
230V BLOWER1
COOLING F
AN
GND
TRPS_2
KLIX
ON MIN.
TEMP
.
F
N
PE
GND
GND
GND
3O 4O 5O
1Y 2Y 3Y
4Y 5Y
7Y 8Y
EV T
OTAL
DRAIN
14S
F4
13S
F1
F2
L1
L2
RF1
RF2
1A
2A
3A
4A
COOLING F
AN 2
HYDR
AULIC SIDE
KLIX
ON F
AN 2 - 4
COOLING F
AN 4
HYDR
AULIC SIDE
3O 4O 5O
3O 4O 5O
ENG
Annex
g0300122EN rel. 1.0 - 01.12.2021
Fig. 19.e
Wiring diagram key
Ref.
Description
Ref.
Description
Base
Selectable fuse carrier
MS
Two-pole ON/OFF switch
cPHC
Main board + expansion card
K.MINIMA
Safety thermostat (outdoor only)
P
Diff erential pressure switch (180/300/450 kg/h)
TRPS2
115-230 V transformer (UG180-300)
AL
3-pin through connector
F1-F2
Power fuses
A
4-pin through connector
F3
Pump fuse
Klixon 1/2/3 Safety thermostat
RD
Pump control relay
TRPS1
115-230 V transformer (UG45-90-150)
FB1-FB2
Burner fan control relay
U-T-S
14-pin through connector
P
Pressure switch control relay
Z
14-pin through connector
RF1-RF2
Flame control relay 1-2
Y-O
4-pin through connector
L1-L2-GROUND Input terminals
MSO
ON/OFF switch (outdoor)
Tab. 19.h