16
DOMESTIC HOT WATER SYSTEM DESIGN
●
Copper tubing must be used for the domestic
hot water system. Unnecessary pressure losses
should be avoided.
●
The boiler may operate with a minimum supply
pressure of 0.3 bar, but under reduced flow rate.
Best operating comfort will be obtained from a
supply pressure of 1 bar.
●
In some installations it will be necessary to pro-
vide a means of accommodating expansion
water. A domestic hot water expansion vessel
is available as an accessory from your supplier.
BOILER LOCATION
234
50
mini
29
60
255 mini
Clearances
The position of the boiler must be such that there
is adequate space for servicing.
The recommended clearances are:
50mm either side of the boiler.
600mm at the front of the boiler.
300mm below the boiler.
Fixing jig
The fixing jig is supplied in three parts :
1
) The connecting plate which allows the connec-
tion and soundness testing of all the pipework
before the boiler is fitted and helps support the
weight of the boiler.
2
) The hook which supports the weight of the boil-
er.
3
) The template which ensures the hook and the
connecting plate are correctly fitted relative to
one another.
Place template on wall in required position mak-
ing allowance for the necessary clearances etc.
Mark the position of the holes for the hook and
the connecting plate.
Drill, plug and fix the connecting plate and hook
to the wall using suitable screws.
Check that both the connecting plate and hook
are level.
If the boiler is not installed immediately, protect
the various couplings to prevent any ingress of
foreign materials E.G. plaster, paint, etc.
Terminal position
The minimum acceptable spacings from the ter-
minal to obstructions and ventilation openings are
as shown in
diagram 26
.
The boiler must be installed so that the terminal is
exposed to the external air.
Note. Under certain weather conditions the flue
may produce a plume of condensation.
If the terminal is fitted within 850mm of a plastic or
painted gutter or 450 mm of painted eaves, an
aluminium shield of a minimum length 750 mm
should be fitted to the underside of the gutter or
painted surface.
Terminal guard
If a terminal guard is required, a suitable guard
with integral deflector can be obtained from your
supplier, Saunier Duval part number 85373.
Cupboard or compartment ventilation
The boiler can be fitted in a cupboard or com-
partment as long as adequate permanent high
and low level ventilation is provided in accord-
ance with ventilation requirements.
Ins 012a
Diagram. 25
