Electrical Connections - Glow-worm COMPACT 100p Instructions For Installation And Operation Manual

9.1 Supply Cable Connection
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.
Open the controls cover door. Remove the two screws securing
the controls facia, see diagram 9.1.
Hinge the control fascia open.
The boiler requires a permanent mains supply through an
external isolator which must also isolate any heating system
controls, see diagram 9.2.
Any heating system controls must not interrupt the permanent
mains supply to the boiler.
Using PVC cable of a suitable length and rating as stated in
Section 1.8 "Electrical Supply", route the mains supply cable
and connect to the appropriate terminals of the connector block,
restrain with the cable clamp supplied, see diagram 9.2.
Standard colours are, Brown - Live, Blue - Neutral, Green and
Yellow - Earth.
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 to make sure that the polarity is
correct.
9.2 Heating System Controls
All external controls and wiring are required to provide a
minimum of reinforced insulation at 250Vrms between the parts
of those devices operating at mains hazardous voltage and the
user accessible parts af those devices.
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 remove 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.
9.3 Clock/timer Kit (if applicable)
Fit the clock/timer kit following the appropriate sections of the
instructions 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, see diagram 9.3.
Electrical Checks
Keep all cables away from hot surfaces.
Carry out preliminary electrical system checks as below:
1. Test insulation resistance to earth of mains cables.
2. Test earth continuity and short circuit of all cables
3. Test the polarity of the mains.
Refit the controls fascia.
221680G

9 Electrical Connections

18
CONTROLS
FASCIA
CONTROLS COVER
CONNECTION
BLOCK
SCREW (2)
SECURING
SCREW (2)
Diagram 9.1
CABLE
RED
CLAMP
LINK
BUSH
R2
R1
N
L
MAINS
CABLE
Diagram 9.2