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FROM 3A
FUSED SPUR
OR MCB
TO
BOILER
FIGURE ELEVEN: TYPICAL Y PLAN WIRING DIAGRAM
FROM 3A
FUSED SPUR
OR MCB
TO
BOILER
FIGURE TWELVE: TYPICAL HEATING ONLY WIRING DIAGRAM
14
CYLINDER
ROOM STAT
STAT
2 1 3
C 1 2
E
N
L
N
RUN
PROGRAMMABLE ROOM
THERMOSTAT
E
N
L
N
RUN
1
2
3
4
5
TIME CONTROLLER
A B C
1
2
3
4
5
MID POSITION
VALVE
BLUE
G/YELLOW
WHITE
GREY
ORANGE
6
7
8
9
10
6
7
8
9
10
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