gledhill BM125 Installation And Servicing Instructions page 14

1.0 DESIGN
1.3 SYSTEM DETAILS
Heating System
Boiler sited above the BoilerMate
Any boiler used must be fi tted with an overheat
thermostat i.e. it must be suitable for use in
a sealed system.
The F & E cistern must be fi tted at a height
which will provide the minimum head required
for the boiler and must be at least 250mm
above the highest point of the system.
The height of the water level in the F & E cistern
from the base of the store should be no greater
than 10m.
A gravity check valve should be fi tted in the
boiler return pipework to prevent gravity
circulation between the BoilerMate 2000 and
the boiler during dormant periods.
An automatic air vent will be required on the
flow adjacent to the boiler and depending
upon the pipe layout a manual air vent may
also be required on the return adjacent to
the boiler.
Boiler sited with dipped flow and return
pipes to the BoilerMate
Any boiler must be fitted with an overheat
thermostat i.e. it must be approved for use in
a sealed system.
An automatic air vent will be required on the
fl ow and return connections adjacent to the
boiler.
The height of the water level in the F & E cistern
must provide the minimum head required by
the boiler and must be at least 250mm higher
than the highest point of the system.
Page 14