21
2000225231B
Diagram 5.8
5 Boiler Installation
SECURING
SCREWS (2)
5739
LIP BRACKET
5.10 External Controls
Make sure that the supply cable and all external cables are
secured and away from hot surfaces.
GRAVITY DOMESTIC HOT WATER AND PUMPED CENTRAL
HEATING, SEE DIAGRAM 5.9.
FULLY PUMPED OPEN VENTED OR SEALED WATER
SYSTEMS, SEE DIAGRAM 5.10.
5.11 Testing
Checks to ensure electrical safety must be carried out by a
competent person
.
After installation of the system, preliminary electrical system
checks as below should be carried out:-
1. Test insulation resistance to earth.
2. Test earth continuity and short circuit of all cables.
3. Test the polarity of the mains.
The installer is requested to advise and give guidance to the
user on the controls scheme used with the boiler.
SL
N
L
9
L
230~50Hz
MAINS
SUPPLY
FUSED
AT 3-AMP
g/y
E
N
K1
K2
PN
g/y
CHASSIS
EARTH
br
b
r
P
SWITCH CONTROL,
TIME SWITCH,
PROGRAMMER ETC.
(when fitted remove
red link)
br
b
L
E
N
CIRCULATON
PUMP
Any external controls must only be wired to interrupt
the red link between terminals SL and 9.
See relevant wiring diagrams for either, a sealed
water system or fully pumped open vented, diagram
5.10 and 9.7.
PUMP
CABLE
FULLY PUMPED
OPEN VENTED
OR SEALED
WATER SYSTEM
GRAVITY DOMESTIC
HOT WATER AND
PUMPED CENTRAL
HEATING
CABLE
CLAMPS
MAINS
CABLE
g/y
CHASSIS
EARTH
L
230~50Hz
MAINS
SUPPLY
FUSED
AT 3-AMP
Pump must be wired into
central heating system remote
controls and NOT to control
box
Yellow link fitted to bridge out
the overheat cutoff
g/y
E
N
y
Ensure RED LINK connected
between 9 and SL.
r
SL
N
L
9
K1
K2
PN
P
Make sure that the red link is connected between
terminals SL and 9 on the terminal block, as
diagram 5.9 and 9.6.
CABLE
CLAMPS
MAINS
CABLE
Diagram 5.9
Diagram 5.10
REMOVE
YELLOW
LINK
X
X
X
br
b
RED LINK
