7
BOILER CONNECTIONS
From left to right
the fixing jig
comprises :
A -
Heating return with isolating valve (
m
).
B -
Cold water inlet with isolating valve (
p
).
C -
Heating flow with isolating valve (
q
), drain
screw (
r
) and safety valve (
s
).
D -
Domestic hot water outlet.
E -
Electrical connection box.
F
-
Gas supply.
Diagram 5
Filters and washers:
1
- Fibre washer
2
- Metal filter
3
- Plastic filter
4, 5
and
6
-Black graphite
PIPING SYSTEM INSTALLATION
• Heating system connections - Pipe diam 22 mm
• Hot water system connections
- Pipe diam 15 mm
• Gas connection - Pipe diam 22 mm
• Safety valve discharge - Pipe diam 15 mm
Water connection
Connect the copper tails and isolating cocks sup-
plied, to the boiler, see
diagram 5
. Connect the
system pipework to the boiler observing the cor-
rect flow and return format as shown in
diagram 5.
Safety valve discharge
WARNING. It must not discharge above an en-
trance or window or any type of public access
area.
Connect the safety valve discharge pipe to the
boiler, the discharge must be extended using not
less than 15 m o.d. pipe, to discharge in a visible
position outside the building, facing downward
preferably over a drain. The pipe must have a con-
tinuous fall and be routed to a position so that any
discharge of water, possibly boiling or steam, can-
not create any danger to persons, damage to
property or external electrical components and
wiring. Tighten all pipe connection joints.
Connect the safety valve discharge pipe to the
boiler, the discharge must be extended using not
less than 15 m o.d. pipe, to discharge in a visible
position outside the building, facing downward
preferably over a drain. The pipe must have a con-
tinuous fall and be routed to a position so that any
discharge of water, possibly boiling or steam, can-
not create any danger to persons, damage to
property or external electrical components and
wiring. Tighten all pipe connection joints.
Gas connection
• The supply from the governed gas meter must
be of adequate size to provide a constant inlet
working pressure of 20 mbar (8 in w.g.).
To avoid low gas pressure problems, it is recom-
mended that the gas supply is connected using 22
mm pipe.
• On completion, the gas installation must be
tested using the pressure drop method and purged
in accordance with the current issue of BS6891.
Gas Safety (Installation and Use) Regulations
In your interests and that of gas safety, it is the law
that ALL gas appliances are installed and serviced
by a competent person in accordance with the
above regulations.
1
2
3
4
5
6
55
55
57,5
57,5
r
p
q
34
25
23
113
s
33
A
B
C
D
F
E
m
Pla 041
