27
6.4
Installation room
The room where the appliance is to be installed must comply
with the Technical Regulations and Legislation in force. It must
be equipped with suitably sized ventilation openings when the
installation is a "TYPE B" installation.
The minimum temperature of the installation room must NOT
be lower than
-5 °C
.
m
CAUTION
– Before assembling the appliance, the installer
MUST
make sure that the wall supports the weight.
– Remember to consider the space needed in order to
access the safety/adjustment devices and to carry
out maintenance interventions (see Fig. 38).
APPROXIMATE MINIMUM DISTANCES
≥ 50 mm
≥ 300 mm
≥ 900 mm
Fig. 38
6.5
New installation or installation of a re-
placement appliance
When
MURELLE HT
boilers are installed on old systems or sys-
tems requiring updating, it is recommended the installer checks
that:
– the connecting flue pipe is suitable for the combustion tem-
perature of the appliance, calculated and manufactured in
compliance with Standards, that it is as straight as possible,
air tight, isolated, with no obstructions or restriction and that
it has appropriate condensate collection and evacuation sys-
tems
– the electrical system has been manufactured in compliance
with specific Standards and by professionally qualified per-
sonnel
– the fuel delivery line and the tank (LPG) comply fully with spe-
cific Standards
– the expansion vessel ensures total absorption of the fluid di-
lation in the system
– the pump flow-head performance is sufficient for the system
characteristics
– the system is clean, free of any sludge, deposits, de aerated
and air tight. For system cleaning, please refer to the relevant
paragraph.
m
CAUTION
The manufacturer declines all liability for any damage
caused by an incorrect implementation of the smoke
outlet or for an excessive use of additives.
6.6
Cleaning the system
Before installing the appliance on a newly constructed system
or replacing a heat generator on an existing system, it is impor-
tant that the system is thoroughly cleaned to remove sludge,
slag, dirt, residue etc.
Before removing an old heat generator from an existing system,
it is recommended that the user:
– puts a descaling additive into the water system
– allows the system to work with the generator active for a few
days
– drains the dirty water from the system and flushes the system
with clean water once or more than once.
If the old generator has already been removed or is not availa-
ble, replace it with a pump to circulate water in the system and
then proceed as described above.
Once cleaning operations have been carried out and before
installing the new appliance, it is recommended that a fluid is
added to the water system to protect it from corrosion and de-
posits.
m
CAUTION
– For further information on the type of additive and
usage, please contact the appliance manufacturer.
– Please remember that you
MUST
install a Y filter
(not supplied with the appliance) on the heating sys-
tem return (R).
