32
5.6
Cleaning the system
Before installing the appliance on a newly constructed system or
replacing a heat generator on an existing system, it is important
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 available,
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
deposits.
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
system return (R).
5.7
Water system treatment
When filling and restoring the system it is good practice to use
water with:
– aspect: clear if possible
– pH: 6÷8
– hardness: < 25°f.
If the water characteristics are different from those indicated, it
is recommended that a safety filter is used on the water delivery
pipe to retain impurities, and a chemical treatment system to
protect against possible deposits and corrosion which could
affect boiler operation.
If the systems are only low temperature systems, it is
recommended that a product is used to prevent the development
of bacteria.
In any case, please refer to and comply with Legislation and
specific Technical Standards in force.
5.8
Boiler installation
Before mounting the
Murelle Revolution 25
boiler on the wall,
check that:
– the wall is solid
enough to support the weight
– the required minimum clearance zones are respected
– it is an outside wall or one which allows the user to respect
the maximum length of the air inlet and outlet pipes (Ø =
160/200 mm) (6 metres in total)
– the smoke outlet allows the user to respect the maximum
length of the pipe (maximum permitted load loss)
– the water and gas supplies are easily accessible.
m
CAUTION
Attach the four circular spacers (1) supplied in front of
and behind the fittings (2).
914
70
70
2
1
Fig. 53
Then:
– mark the two points where the holes are to be made to insert
suitable expansion plugs that support the weight of the boiler
– mark the points where the holes (Ø 164 mm) are to be made
to pass the air inlet and outlet and smoke outlet pipes through
Ø160/200
Ø160/200
Ø80
82,5
71
135
391
208
172
208
330
165
135
165
Fig. 54
– mount the boiler safely on the wall.
m
CAUTION
– The height of the boiler is to be such that disassembly
and maintenance interventions are facilitated.
– The manufacturer is not responsible for any damage
to people, animals or objects following incorrect
mounting of the appliance.
