Supplied By www.heating spares.co Tel. 0161 620 6677
20
221474C
9 Electrical Connections
Diagram 9.2
MAINS
CABLE
CABLE
CLAMP
L
N
E
2
3
1
COVER
SCREW (2)
RED LINK
Remove when
connecting any
heating system
controls.
2643
9.1 Supply Cable Connection
The boiler requires a permanent mains supply through an isolator
which must also isolate any heating system controls, see diagram
9.1.
Any heating system controls must not interrupt the permanent
mains supply to the boiler.
Remove the electrical connector from the loose
items pack.
Remove the two screws and cover from the connector, see diagram
9.2.
Using PVC cable of suitable length and rating as stated in Section
1.8, connect the mains supply cable to the appropriate terminals of
the connector, see diagram 9.1.
Standard colours are, Brown - Live; Blue - Neutral; Green and
Yellow - Earth.
The mains cable outer insulation must not be cut back external to
the plug, see diagram 9.2.
Make the earth cable of a greater length so that if the cable is
strained the earth would be the last to become disconnected.
CAUTION. It is essential that the polarity is correct.
9.2 Heating System Controls
CAUTION: To prevent an induced current from switching the
central heating on, when not required, it is important that the heating
system control cables are separated from the other mains supply
cables.
The heating system should have installed: a programmer and room
thermostat controlling the boiler.
Thermostatic radiator valves may be installed in addition to the
room thermostat.
Note: For further information, see The Building Regulations 1991 -
Conservation of fuel and power, 1995 edition - Appendix G, table 4b.
If electrical controls are not to be used to regulate the heating
system, do not disturb the red link cable.
When any form of electrical control is being used to regulate the
heating system, remove the red link cable and connect heating
system controls in series.
The mains cable outer insulation must not be cut back external to
the plug.
9.3 Clock/Timer
An internal clock/timer kit can be supplied, refer to the literature
supplied with it.
9.4 Frost Thermostat
If the installation requires protection by a “frost thermostat”, connect
a single pole type, to the appropriate terminals of the connector.
9.5 Cable and Connector Securing
After completing all the connections to the boiler, secure the
cable(s) with the cover, using the two screws previously removed,
see diagram 9.2.
10 Boiler Fixing
10.1 Mounting the Boiler
After installing the flue, boiler mounting frame, gas, domestic and
heating systems, making the electrical connections and preparing
the flue components, continue as below:
Lift the boiler into position, hooking it onto the boiler mounting frame
at the top, fully push the boiler back to the mounting frame, locating
the studs into the clips, then loosely fit the two boiler securing
screws at the top, see diagram 10.1.
10.2 Internal Flue Fixing
Fit gasket to flue elbow.
Secure the flue assembly to the boiler, see diagram 10.1.
Fit the fan to the flue elbow spigot making sure the fan sealing ring
is fitted correctly and secure with the previously removed screws.
Secure the flue collector screws.
Make good internally and externally around flue.
10.3. External Flue Fixing
Fit gasket to flue elbow.
Locate flue elbow onto the boiler.
Fit the fan to the flue elbow spigot making sure the fan sealing ring
is fitted correctly and secure with the previously removed screws.
Secure the flue collector screws.
Pull the flue/air duct(s) forward and engage onto the flue elbow, see
diagram 10.2. Check the wall face to terminal dimension, see
diagram 7.6.
Push the air duct back into the wall, whilst holding the flue duct onto
the flue elbow, then secure the flue duct to the elbow, see diagram
10.2.
Pull the air duct back into engagement with the flue elbow and
secure/seal.
Make good internally and externally around flue.