Page 12
DESIGN
SY
STEM DET
AILS
Heating System
General – Sealed And Open Vented Heating Systems
The BoilerMate BP is suitable for both an open vented and a sealed heating systems
shown schematically in fi gures 9 and 10 respectively. The system components can be
installed inside the appliance case as shown in fi gures 3 and 4.
Although, the heating system can be either open vented or sealed, the thermal store
must always be open vented as shown in fi gures 9 & 10 and also: -
• The combined cold feed and open vent pipe arrangement must not be used.
• No valve should be fi tted in the safety open vent and which must be a minimum
of 22mm copper pipe or equivalent.
The BoilerMate BP is designed to be installed with condensing or non condensing
oil or gas boiler which is capable of delivering hot water at a minimum temperature
of 80°C.
The boiler must be set to operate at nominal 82°C fl ow which usually corresponds to
maximum boiler control thermostat setting.
It is recommended that an automatic bypass is fi tted to compensate for pressure and
hence the fl ow rate changes in the heating circuit e.g. when the thermostatic radiator
valves close. The bypass valve must be set by the installer to suit the system i.e. to
provide minimum fl ow required for the boiler when all TRVs are closed.
hot
water
cold
mains
CH-Flow
F&E Cistern
CH-Return
mixing
valve
Immersion
heater
Boiler
hot
water
cold
mains
CH-Flow
F&E Cistern
CH-Return
mixing
valve
Immersion
heater
Sealed system kit
Boiler
PRV
Open vented heating system
Sealed heating system
Figure 10
Figure 9
Summary of Contents for BMBP125
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