gledhill BoilerMate CP 120 Design, Installation & Servicing Instructions page 16

INSTALLATION
Feed And Open Vent Pipe
It is normally envisaged that the top up cistern will be located in the same cupboard
as the BoilerMate CP appliance itself to maintain a dry roof space.
The cold feed/open vent pipework assembly (as supplied) should be used to install
the top up cistern directly on top of the appliance.
If it is necessary to locate the cistern in the roof space (or on a higher fl oor) the cold
feed/open vent pipework assembly (as supplied) should be used to connect to the
top up cistern and pipework site run by the installler to connect this to the appliance.
Obviously, any pipework in the roof space and the feed and expansion cistern will
need to be adequately insulated to protect against frost damage.
Combined Feed And Open Pipe Arrangements Must Not Be Used.
No valves should be fi tted in the safety open vent which must be a minimum of 22mm
copper pipe or equivalent throughout its length.
The mains cold water supply to the ballvalve (if provided) shall be provided with a
suitable servicing valve.
The overfl ow/warning pipe (if provided) shall have a continuous fall, be fi tted to
discharge clear of the building and be sited so that any overfl ow can be easily observed.
It shall also be installed in a size and material suitable for use with heating feed and
expansion cisterns in accordance with BS 5449 (e.g 22mm copper) and should not
have any other connections to it.
Note: If a warning/overfl ow pipe is NOT provided the top up cistern should be
fi lled from a temporary hose connection supplied from any cold water tap or
from a permanent cold branch provided adjacent to the top up cistern. The
temporary hose must be fi tted with a double check valve and removed once
the appliance is fi lled.
The store may fi ll more slowly than the feed tank. It is important to check the
water level again in the cistern after commissioning.
Cold feed / open vent
pipework
(as supplied)
Interconnecting
Pipework
(By Installer)
BoilerMate
CP
Figure 1.7
INSTALLATION
Page 16