24
EVOMAX
-
Installation & Servicing
InStALLAtIon
31 GAS ConnECtIon
Refer to Frame 1 for details of the position of the gas connection.
A MINIMUM working gas pressure of 17.5 mbar (7” w.g.) must
be available at the boiler inlet for natural gas and 37mbar for
propane with the boiler firing. Refer to Frame 58 for details of the
pressure test point position.
Extend a gas supply pipe NOT LESS THAN 22mm O.D. to the
boiler and connect using the gas cock provided.
note.
If the pipe run from the meter to the boiler is greater
than 3m (10’) it is recommended that a 28 mm O.D. pipe is
used.
ImPoRtAnt
. The gas service cock contains a non-metallic
seal so must not be overheated when making capillary
connections.
29 boILER WAtER ConnECtIonS
The boiler flow and return pipes are
terminated with a 1
1
/
4
” BSP male taper
connection located at the bottom of the
appliance.
note.
This appliance is NOT suitable for use
with a direct hot water cylinder.
Plastic plugs fitted into the open ends of
the flow and return pipes must be removed
before connecting the system pipework.
30 fRoSt PRotECtIon
The Evomax boiler has built into its control system the facility to
protect the boiler only against freezing.
If the boiler flow temperature T
1
, falls below 5
o
C the pump and
burner run until the temperature exceeds 19
o
C.
Central heating systems fitted wholly inside the building do
not normally require frost protections as the building acts as
a ‘storage heater’ and can normally be left at least 24 hours
without frost damage. However, if parts of the pipework run
outside the building or if the boiler will be left off for more
than a day or so, then a frost thermostat should be wired
into the system, see Frame 49.
In
S
t
ALLA
t
Ion
Flow
Return
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