9
*
On request extension cables can be delivered, so that
the gas train can be fitted on the opposite side to the
instrument panel, thermostat pocket and the flow.
8. ASSEMBLY AND INSTALLATION GUIDELINES
8.6 Condensate drain
A drain pipe with ext. dia. 32 mm can be secured with
adhesive to the siphon trap.
The liquid condensate produced by condensing boilers
must be led away via a pipe to a drain for disposal. This
pipe may be separate from the flue system and incorpo-
rate a water- sealed trap allowing condensate to pass but
preventing the escape of flue gases.
8.1 General
Boiler can be installed in open or closed systems.
8.2 Boiler assembly
Broag provides special tools, on loan, for the boiler
assembly with detailed building instructions. However,
building supervision and/or actual boiler erection services
can be provided by Broag or an approved boiler erection
engineer.
8.3 Water connections
The boiler water connections can be fitted on one side of
the boiler either left or right hand side. The return is fitted
as standard on the left-hand side of the boiler (view from
the front). The return can be fitted on the right; this must
be clearly specified when the boiler is ordered.
The water connection is flanged on the boiler with a pipe
connection for welding Ø 70 mm to the installation.
The top blind-flange has an integral cast 1" tapping to
accept a safety valve. The end sections have a 3/4"
tapping to accept a drain off cock (Tapping BSP). The
economiser has at the bottom a 1/2" tapping for a drain
off cock.
8.4 Pocket for instrument panel
The pocket should be fitted in the top front end section of
the boiler and at that side of the boiler where the gas train
is fitted. Other end section tapping 1" should be plugged.
8.5 Water pressure
Each section is hydraulically tested to at least 12 bar.
Maximum test pressure for the assembled boiler block is
6 bar.
Maximum working pressure is 6 bar.
Minimum working pressure is 0.8 bar at a maximum
working temperature of 110
°
C or 0.3 bar at a maximum
working temperature of 95
°
C.
9. GAS SUPPLY
Fig. 07 Siphon trap dimensions
9.1 General
The gas train can be fitted on the left or right hand side of
the boiler but is normally positioned on the same side as
the instrument panel is fitted*.
The local Gas authority should be consulted to ensure
that an adequate pressure and supply is available, at the
boilers maximum output. To minimise risk of sediment or
foreign particles entering the control valves, an approved
filter may be fitted into the pipework downstream. The
gas supply should be conform to the British Gas safety
regulations.
9.2 Gas pressure
Maximum gas pressure at inlet 100 mbar.
(Minimum 20 mbar).
Burner pressure: 12.3 mbar.
