Fixing Jig; Piping System Installation - Saunier Duval ISOFAST F 28 E Installation And Operating Instructions Manual

FIXING JIG

The fixing jig is made up, from left to right, as fol-
lows:
A - Heating return fitting with isolating valve(v) and
drain knob (u).
B - Cold water inlet fitting with isolating valve
(m)and factory fitted flow regulator and filter (not
shown).
u
A
v
Diagram 7

PIPING SYSTEM INSTALLATION

Heating system connections - Pipe diam. 22mm
Hot water system connections - Pipe diam. 15mm
Gas connection - Pipe diam. 22mm
Domestic safety valve connection - Pipe
diam.15mm
Heating safety valve connection - Pipe diam.
15mm
Water connection
Connect the copper connections supplied, to the
fixing jig fittings, see diagram 7. Connect the sys-
tem pipework to the boiler observing the correct
flow and return format as shown in diagram 8.
Safety valve discharge
Tee the domestic safety valve outlet pipe to the
heating safety valve outlet pipe and extend hori-
zontally to the outside wall.
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
outlets of both the heating safety valve and the
hot water safety valve, the discharge must be ex-
tended using not less than 15 m o.d. pipe, to dis-
charge in a visible position outside the building, fac-
ing downward preferably over a drain.
The pipe must have a continuous fall and be routed
to a position so that any discharge of water, possi-
bly boiling or steam, cannot create any danger to
persons, damage to property or external electri-
cal components and wiring. Tighten all pipe con-
nection joints.
G
B
m
t
C - Heating flow fitting with isolating valve (q),
drain knob (r) and safety valve (s
D - Domestic hot water outlet fitting with safety
valve (s ).
2
F - Gas fitting.
G - Filling device.
r
C D
q
Gas connection
The supply from the governed gas meter must be
of adequate size to provide a constant inlet work-
ing 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.
Additional
Boiler
expansion
vessel
(if required)
Bypass
Return valve
Heating
circuit
Flow
control valve
Diagram 8
).
1
F
Domestic
water
Filling device
Drain point
9