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Page 34
2.0 INSTALLATION
2.3 COMMISSIONING
Important Do’s and Don’ts
DO check the incoming mains water pressure and fl ow rate are adequate. (The preferred
range of mains pressure is 2-3bar).
DO check that all plumbing and electrical connections are in accordance with
the labelling on the thermal store.
DO check and ensure the air pressure side of the expansion vessel is set at 1.0 bar (or
as specifi ed)
DO ensure the BoilerMate A-Class SP is fi tted on a sealed primary (i.e. closed) system
and the boiler is suitable (i.e. fi tted with an overheat thermostat)
DO with automatic fi ll models adjust the ballvalve so that the water level in the
appliance F & E cistern when the system is cold is correct and does not overfl ow when
the appliance is at maximum temperature
DO with automatic fi ll models turn down the servicing valve for the ballvalve in the F
& E cistern, once the system is fi nally fi lled, to the point where the warning/overfl ow
pipe will cope with the discharge arising from a ballvalve failure.
DO check that the F & E cistern is not more than 6m above the base of the BoilerMate
appliance.
DO with automatic fi ll models make sure that there is adequate clearance above
the appliance F & E cistern to service the ballvalve.
DO ensure that the range rated appliances are set at the highest output and the boiler
thermostat is set to maximum for all boilers.
DO insulate any exposed pipework in the BoilerMate A-Class SP cupboard.
DO plumb the overfl ow/warning pipe (if fi tted) in a 20mm internal diameter pipe
material which is suitable for use with a heating F & E cistern, in accordance with BS 5449
(such as copper) and ensure it has a continuous fall and discharges in a conspicuous
external position.
DO check that the primary system pressure does not exceed 2 bar when the whole of
the system is up to temperature.
DO check the pump settings
a. The boiler/heating pump should be set to give a temperature difference across the
fl ow and return of not more than 11°C.
b. The hot water plate heat exchanger pump should be set at maximum.
DO ensure that the bypass valve for the heating system is set correctly.
DON’T use a combined feed and vent on BoilerMate A-Class installations.
DON’T use pipe smaller than 28mm between the boiler and the BoilerMate when
the boiler rating exceeds 20kW (about 68,000 Btu/h).
DON’T operate the ‘switch’ backup facility until the system is fully fi tted, vented and
commissioned.
DON’T place any clothing or other combustible materials against or on top of this
appliance.
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