29
ExTERNaL ELECTRICaL CONTROLs
Wiring External to the Boiler
Frost protection
If parts of the pipework run outside the house or if the boiler will be left off
for more than a day or so then a frost thermostat should be wired into the
Note If the boiler is installed in a garage it may be necessary to t a pipe
thermostat, preferably on the return pipework.
28
REpLaCINg pRE-FITTED MaINs CaBLE
1.
2.
3.
4.
5.
6. Route replacement cable back through the cable clamp and grommet and re-tighten
7.
mains electrical connections to the boiler it is important that the wires are prepared in
such a way that the earth conductor is longer than the current carrying conductors,
such that if the cord anchorage should slip, the current carrying conductors become
8.
5
4
Earths are not shown for clarity but must
never be omitted.
27
INTERNaL WIRINg
INsTaLLa TION
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