Supplied By www.heating spares.co Tel. 0161 620 6677
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PCB
display PCB
display PCB
display PCB
PCB
Gas valve
Fan
Condense pressure switch
Flow sensor
Return sensor
Pump
External transformer
Cold water inlet sensor
External sensor (if fitted)
Actuator
24V connection for time clock or
room thermostat
Relay for actuator
Status LED
PLUG or CONNECTION
OPE
F
P.S.
S1
S2
P
S3
S4
3W (M)
R.T.
RL3V
L1 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
Plug M4 on input PCB
Plug M1on input PCB
Plug M4 on input PCB (terminals 2 & 3)
Input PCB
Plug X20 on display PCB
PLUG or CONNECTION
X7A
X9
X20
DESIGNATION
Connection from main PCB
Unused
Status LED connection
PCB
Input PCB
Input PCB
Input PCB
Input PCB
Input PCB
Input PCB
Input PCB
Input PCB
PLUG or CONNECTION
M1
M4
M5
M6
M7
M8
M9
F1
DESIGNATION
3-port valve actuator
Low voltage connector
Incoming 230V supply
230V supply to main PCB
Low voltage connector
230V connector (unused)
230V clock supply
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