Technical data

35
PCB
Display PCB
Display PCB
Display PCB
PCB
Gas valve
Fan
Condense pressure switch
Flow sensor
Return sensor
Pump
External transformer
24V connection for time clock or
room thermostat
Relay for actuator
Status LED
PLUG or CONNECTION
OPE
F
P.S.
S1
S2
P
R.T.
RL3V
L2
DESIGNATION
Plug X2 on main PCB
Plug X2 on main PCB
Plug X2 on main PCB
Plug X3 on main PCB
Plug X3 on main PCB
Plug X1 on main PCB
Plug X10 on main PCB
Plug M4 on input PCB (terminals 2 & 3)
Input PCB
3-pins connector on display PCB
PLUG or CONNECTION
X7A
X9
3-pins connector
DESIGNATION
Connection from main PCB
Unused
Status LED connection
PCB
Input PCB
Input PCB
Input PCB
Input PCB
Input PCB
Input PCB
PLUG or CONNECTION
M2
M3
M4
M5
M7
F1
DESIGNATION
Incoming 230V supply
230V supply to main PCB
230V clock supply
Low voltage connector (to main PCB)
Low voltage connector (heat request)
2AF fuse
PCB
Main PCB
Main PCB
Main PCB
Main PCB
Main PCB
Main PCB
Main PCB
Main PCB
Main PCB
PLUG or CONNECTION
X1
X2
X3
X7
X8
X10
F1
F2
F3
DESIGNATION
Incoming 230V supply & pump connection
Fan connection, condense pressure switch
connection, gas valve connection
Sensor connections
Display board connection
Unused
External transformer connection
2AF fuse
2AF fuse
4AT fuse