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BoilerMate products are vented cylinders, so there is no requirement for a pressure
and temperature relief valve to be fitted to them.
This is a key benefit of a thermal store over an unvented cylinder. This enables greater
flexibility of location in the building, as there is no requirement to install discharge
pipework with a constant fall to an outside wall, or upgrade the soil and vent pipework
to be able to withstand high temperature discharges.
This unit uses minimal power in stand by mode, and can be turned off if required.
All BoilerMates are supplied with an immersion heater 3kW 240v AC, complete with
a thermostat set at 75°C and an overheat thermostat set at 90°C, which will require
resetting if operated.
The immersion heaters purpose is to provide a backup heat source if the boiler is out
of operation. Please note that this back up facility will only provide sufficient input
for the domestic hot water requirement.
The heat losses from thermal stores should not be directly compared with heat losses
from unvented or vented cylinders because they are treated differently in SAP. This
is because the unvented and vented cylinders are tested at 65
°
C and the thermal
store at 75
°
C.
The feed and expansion tank must be located above the thermal store with the
SP and SP PP variants. In the case of the integrated thermal store, BMST-OV PP, the
feed and expansion tank water level must also be a minimum of 300mm above the
highest radiator.
For hot water only BoilerMate SP and SP PP models, the feed and expansion tank must
be above the top of the thermal store.
The maximum working pressure of the thermal store is 1 bar. This means that the feed
and expansion tank can be located up to 10 metres above the base of the thermal store.
The OV model has the option of the top up cistern with ballvalve and warning/overflow
pipe which can be supplied as an optional extra if required. However, the standard
preferred arrangement available for the SP models are for the cistern to be manually
filled from a temporary hose connection fitted with a double check valve.
The cistern must not be fitted more than 10 metres above the BoilerMate CP appliance
itself.
DESIGN
INTRODUCTION
Summary of Contents for BOILERMATE OV PP
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