11Independent - Installation and Servicing
GENERAL
General
1.
2.
o
3.
o
a.
b.
c.
d.
4. ‘Make-up’ Water.
a.
or
b.
5. Filling
a.
b.
c.
d.
Notes
a. The method of lling, relling, topping up or ushing sealed
primary hot water circuits from the mains via a temporary hose
connection is only allowed if acceptable to the local water
authority.
b. Antifreeze uid, corrosion and scale inhibitor uids suitable for
use with boilers having aluminium heat exchangers may be used
in the central heating system.
2
SYSTEM REQUIREMENTS - Central Heating
Water Flow Rate and Pressure Loss
o
(
o
Safety valve setting
Vessel charge pressure
System pre-charge pressure
System volume Expansion vessel
(litres) volume (litres)
For other system volumes
multiply by the factor across
DOMESTIC HOT WATER
1.
2.
o
3.
4.
a.
b.
5. Hard Water Areas
205367-3.indd 11 13/12/2010 16:20:50
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