27
Installation and Servicing
Section 2 - Installation
INST
ALLA
TION
2.20 INSTALLER WIRING - CONTINUED
w
g
o
g/y
b
BOILER
L
N
MAINS IN
SL 1
SL 2
E
L
N
E
L
N
E
CH
ON
R/S
ON
R/S
C/S
HW
ON
HW
OFF
C/S
ON
IN
L
IN
L
FUSED
SPUR
TIMER
CH ON
L
N
HW ON
HW OFF
Y PLAN
VALVE
LOGIC SYSTEM
2
S BOILER WITH Y PLAN SYSTEM
br
br
o
g/y
b
b
g/y
g
g
L
N
E
L
N
E
CH
ON
R/S
ON
HW
ON
HW
OFF
C/S
ON
FUSED
SPUR
TIMER
CH ON
L
N
HW ON
HW OFF
HW
S PLAN
VALVE
CH
S PLAN
VALVE
R/S
o
BOILER
L
N
MAINS IN
SL 1
SL 2
E
IN
L
IN
L
C/S
LOGIC SYSTEM
2
S BOILER WITH S PLAN SYSTEM
Note. If an outside sensor is connected then;
•
HW OFF to SL2 IN