Technical data

15
X14
(PIN 4)
LIVE
SUPPLY
red
HEATBANK
OVERHEAT
STAT
HIGH/LOW
GAS VALVE
N
N
N
STANDBY
INDICATOR
FROST THERMOSTAT (IF FITTED)
N
black
X3 (PIN 4)
L
X14
(PIN 1)
FUSE
3.15A
QUICK
BLOW
red
brown
X12
(PIN 2)
X13 (PIN 5)
X13 (PIN 4)
X13 (PIN1)
X13
(PIN 3)
X12 (PIN 4)
X12
(PIN3)
X13
(PIN 2)
N
white
OPERATOR
SWITCH OR
PROGRAMMER
HEATING
HOT
WATER
brown
blue
X1
(PIN 3)
X1
(PIN 1)
HOT WATER
FLOW
SWITCH
HOT WATER
CONTROL
THERMOSTAT
pink
pink
X2
(PIN 1)
X2
(PIN 3)
OPTIONAL
LINK
1
10
9
5
6
13
14
X16
(PIN 2)
black
HOT WATER
HIGH LIMIT
STAT
X16 (PIN 1)
N
black
PUMP
DIVERTER
VALVE
brown
X10 (PIN 1)
X7 (PIN 3)
SAFETY LIMIT
STAT
orange
orange
X8
(PIN 1)
X8
(PIN 2)
X6
(PIN 1)
VDR
(SUPPRESSOR)
N
brown
X4
(PIN 1)
FAN
RELAY K2
RELAY K1
PILOT
GAS
VALVE
MAIN
GAS
VALVE
SAFETY
CIRCUITS
(SPARK
IGNITION
AND
FLAME SENSE)
brown
brown
CN4
(PIN ML)
CN3
(PIN PL)
CN2
(PIN L1)
grey
white
brown
CN2
(PIN L3)
CN2
(PIN L2)
CN5
(PIN FL)
brown
CONTROL
BOARD
IGNITION
BOARD
NO
NC
C
grey
ROOM THERMOSTAT
(IF FITTED)
NN
brown
CN1 (PIN L)
N
N
AIR FLOW
PRESSURE
SWITCH
brown
N
X11
(PIN 4)
ELECTRONICS
ELECTRONICS
WITH
5 MINS' OFF
DELAY
DEMAND
INDICATOR
N
RLA
RLB
HEATING
CONTROL
STAT
X15 (PIN 2)
WHITE
X15 (PIN 3)
WHITE
RLC
X3 (PIN 5)
black
Fig. 10. Functional flow diagram.
To External Programmer
Note: If programmer fails, link
connector terminals, as shown by
dotted line, to create temporary
heat availability.
Switched central
heating from
programmer
Switched hot
water from
programmer
Live supply
to programmer
Neutral
Connector
X12 on
control
board
Plug-in
connector
4
3
2
1
Fig. 12. External programmer connections.
54321
54321
Connector X13
on control board
Connector X13
on control board
Room thermostat
Frost thermostat
Remove link
Live
Neutral
Switched live
Fig. 11. Room/frost thermostats and programmer.