gledhill BoilerMate CP 120 Design, Installation & Servicing Instructions page 9

Hot and Cold Water System
General
A schematic layout of the hot and cold water services in a typical small dwelling is
shown below. BoilerMate CP will operate at mains pressures as low as 1 bar and as
high as 5 bar although the recommended range is 2-3 bar dynamic at the appliance.
It is also important to check that all other equipment and components in the hot
and cold water system are capable of accepting the mains pressure available to the
property. If the mains pressure can rise above 5 bar or the maximum working pressure
of any item of equipment or component to be fi tted in the system, a pressure limiting
(reducing) valve set to 3 bar will be required.
If you encounter a situation where the water pressure is adequate but fl ow rates are
poor please contact our technical helpline for details of an eff ective solution.
Note : Each BoilerMate CP is fi tted with a strainer and fl ow regulator on the cold mains
supply connection. If the supply pressure is less than 2 bar or if all taps are provided
with fl ow regulators the fl ow regulator on the cold inlet should be removed.
No check valve or similar device should be fi tted on the cold water supply branch to
the BoilerMate CP.
The hot water fl ow rate from the BoilerMate CP is directly related to the adequacy of the
cold water supply to the dwelling. This must be capable of providing for those services,
which could be required to be supplied simultaneously, and this maximum demand
should be calculated using procedures defi ned in BS EN 806:1-5: BS EN 8558:2011.
If a water meter is fi tted in the service pipe, it should have a nominal rating to match
the maximum hot and cold water peak demands calculated in accordance with BS
EN 806:1-5: BS EN 8558:2011. Please note, the BoilerMate CP is fi tted with a 15 l/m
fl ow restrictor.
Warning/
overflow
pipe
Second
dwelling
Pressure limiting valve
NOT REQUIRED at
pressures below 5 bar
unless any components
have a lower
maximum working
pressure
Double check valve
NOT REQUIRED unless
pipe supplies more
MCWS
than one dwelling
supply
pipe
Top up cistern
MCWS
BOILERMATE CP
Sink
H C
a a
Check valve
NOT REQUIRED unless
chemical water
treatment unit is fitted
Typical hot and cold water distribution
Note: The diagram below shows the top up
cistern with ballvalve and warning/overfl ow
pipe which can be supplied as an optional extra
if required. However, the standard preferred
arrangement is for the cistern to be manually
fi lled from a temporary hose connection fi tted
with a double check valve.
The cistern must not be fi tted more than 10
metres above the BoilerMate CP appliance itself.
Safety/open vent
Expansion/
cold feed
Shower
a
Page 9
DESIGN
'a' - flow regulator recommended for
better balance of hot and cold
water supplies
WC - fitted
with BS1212
Bath Hand basin ballvalve
H C H C C
a a a a
Figure 1.5
TECHNICAL DATA
SV