Benchmark Accolade Estate AE140D Design, Installation And Servicing Instructions page 12

Motorised
Valve
(Energy
cut-out)
Pump
Boiler
Schematic Open Vented Primary System
Gauge
Safety Valve
Boiler
Expansion
vessel
Schematic Sealed Primary System
Motorised
Valve
Motorised
Valve
(Energy
cut-out)
Motorised
Valve
Pump
INSTALLATION
HEATING/PRIMARY SYSTEMS
The boiler and primary/heating systems
should be sized and installed in accordance
with BS 5449.
SAFETY
Accolade Estate is fitted with a Pressure
Relief Valve to cope with any increase in
system pressure above the design limitations,
and a Temperature Relief Valve to provide an
adequate safety factor when used with boilers
up to 45kW output.
The primary water temperatures should be
controlled as outlined below.
PRIMARY CIRCUIT
it is essential that the circuit between the
boiler and the Accolade Estate is pumped.
The motorised zone valve supplied should
be fitted adjacent to the unit and controlled
by the cylinder thermostat supplied. The
thermostat and motorised valve must be
wired so that they both switch off should an
overheat situation develop. it is important to
follow the wiring diagram in the Wiring Section
of these instructions.
SEALED PRIMARY CIRCUIT
Any boiler used must be of a rated output of
less than 45kW and must be fitted with an over
temperature cut-out.
Unvented primary circuits may be filled
or replenished by means of a temporary
connection between the circuit and a supply
pipe provided a 'Listed' double check valve
or some other no less effective backflow
prevention device is permanently connected
at the inlet to the circuit and the temporary
connection is removed after use.
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