P2_GEPARD_user manual_ work basis_EN_02 - 02/10 - Protherm
- 13 -
HOW TO USE THE BOILER
The valve for topping up the pressure in
the expansion chamber is on the right
side.
Caution:
Con
fi
rm that the expansion
chamber is suf
fi
cient for the given quantity
of water in the CH circuit (see the project
installation documentation).
Safety valve
8.11
The safety valve is located the underside
of the boiler on the left of the hydraulic
block. Draining from the safety valve
may lead (if the maximum pressure in
the system is exceeded) to the out
fl
ow
of water or the escape of steam. For
over
fl
ow that may emerge through the
safety valve, it is therefore recommended
to install a bleeder that feeds into the
sewerage system of the property.
Caution:
Do not under any circumstances
manipulate the safety valve during the
operation of the boiler. The safety valve
furthermore may not be used for releasing
water from the boiler or the heating
system. The settling in the valve of detritus
from the heating system is not covered by
the warranty.
Hooking up gas
8.12
The GEPARD version of the boiler is
designated for operation with natural gas
with a rated pressure in the piping system
of 2 kPa, for which a heating value from 9
to 10 kWh/m
3
is most often speci
fi
ed. The
dimensions of the internal gas distribution
piping and gas meter must be adequate
to handle the other gas appliances of the
user.
Gas lines in buildings must be installed in
compliance with STN EN 1775.
Caution:
It is recommended that the
gas inlet into the boiler be tightened by
fastening a union nut on the top face of
the socket through the corresponding
sealing (see the Packing list).
a
After completing the
installation of the gas piping
into the boiler the gas-
tightness of the completed
connection must be checked
thoroughly.
