Boiler Sited Below Boilermate A-Class; Boiler Sited Above The Boilermate; Av - Automatic Air Vent - gledhill BoilerMate A-Class OV SOL Series Design, Installation & Servicing Instructions

Primary return
Primary flow
Boiler

AV - Automatic air vent

AV
Boiler
AV
Gravity
check
valve
Primary return
Primary flow
F&E cisterns
BMA OV SOL
Figure 1.11
F&E cisterns
BMA OV SOL
Figure 1.12
Page 19
DESIGN

Boiler Sited Below BoilerMate A-Class

Any temperature controlled boiler can be
used when the flow pipe from the boiler to
the BoilerMate A-Class rises continuously. The
primary flow also acts as the open vent/safety
for the boiler, therefore no valve shall be fitted
in the primary flow or open vent.

Boiler sited above the BoilerMate

Any boiler used must be fitted with an overheat
thermostat i.e. it must be suitable for use in a
sealed system.
An automatic air vent will be required on the flow
and return connections adjacent to the boiler.
The F & E cistern must be fitted at a height which
will provide the minimum head required for the
boiler and must also be at least 250mm above
the highest point of the system.
The height of the bottom of the F & E cistern
from the base of the store should be no greater
than 6m.
A gravity check valve should be fitted in the
boiler return pipework to prevent gravity
circulation between the BoilerMate A-Class and
the boiler during dormant periods.
Connection of Bathroom Radiator/Towel-Rail
for Summer use
If separate Summer/Towel rail circuits are required,
these must be piped as a separate zone from the
main heating circuit with their own zone valve and
time/temperature control (programmable room
thermostat) as shown in the Installation section of
these instructions - Zoned Heating Systems.