gledhill BM125 Installation And Servicing Instructions page 15

Radiator
Boiler
D.V. : Drain valve
D.V.
1.0 DESIGN
1.3 SYSTEM DETAILS
Heating System
Connection of Bathroom Radiator/
Towel-Rail for Summer use
F & E Cistern
If a pumped circuit is required for the bathroom
radiator/towel rail, the fl ow pipework can be
teed anywhere into the primary fl ow between
the boiler and the BoilerMate. The return
pipework can be connected into the 15mm
copper blanked connection provided adjacent
to the boiler pump. We recommend any
radiators/towel rails on this circuit are provided
with T.R.V.'s and that the total heat output of
the radiators/towel rails is not more than 5%
BM 2000
of the boiler output.
The radiators will only get hot when the
boiler is fi ring.
It is important that the fl ow rates through these
radiators is adjusted to the minimum required
at the lockshield valves on the radiators. If this
is not done the performance of the BoilerMate
will be adversely affected.
The height of the water level in the F & E cistern
must provide the minimum head required by
the boiler and must be at least 250mm higher
than the highest point of the system.
If heating of a single bathroom radiator or
towel rail is required in summer, then it can
be piped as a gravity circuit. The fl ow pipe to
the radiator can be teed into the safety open
vent pipe and the return pipe from the radiator
can be connected to the store drain connection
F & E Cistern
and the drain moved to the return pipe. The
radiator can be fi tted with a T.R.V. if required as
long as this is suitable for gravity circulation i.e.
low resistance type.
The height of the water level in the F & E cistern
must provide the minimum head required by
BM 2000
the boiler and must be at least 250mm higher
than the highest point of the system.
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