
Supplied By www.heating spares.co Tel. 0161 620 6677
38
221473B
4 Replacement of Parts
SECURING SCREW
(To support the control
housing if necessary)
FASCIA
FASCIA
SECURING
SCREW (3)
CONTROL
HOUSING
COVER
SECURING
SCREW
CONTROL HOUSING
SECURING SCREW (2)
Diagram 4.10
3904
TEMPERATURE
CONTROL KNOB
CONTROL
HOUSING
COVER
TIMER/CLOCK
(IF FITTED)
4.13 Transformer
Before starting, refer to section 1.1
Isolate the boiler from the electrical supply, refer to Section 1.3
Remove the outer case, refer to section 1.4
Remove the control housing cover, refer to Section 4.11.
Support the control housing, see diagram 4.10
Remove the transformer cables correctly, see,diagram 4.12.
5229
Diagram 4.12A
WIRING AS
DIAGRAM 4.12
CLOCK / TIMER
COMMON
HEATING ON
L
N
BR
B
Y Y
BR
B
Y Y
Y1 Y2 N L
Diagram 4.11
TRANSFORMER
USER CONTROL
BOARD
SUPPORT
POST (3)
CONTROL
BOARD
MULTI-PIN
CONNECTOR
(6)
4 WAY
TERMINAL
BLOCK
5015
4 WAY
TERMINAL
BLOCK
Note:
Remove
'Yellow Link'
before fitting
Clock/Timer
*
*
Y
B BR
Y
ELECTRICAL
CONNECTORS (6)