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8 Draining of the appliance
8.1
Heating circuit
•
Turn on the drain cock (1) provided at
the system low point.
•
Provide an air intake by opening a
radiator bleed screw.
•
In order to drain only the water in the
boiler, first shut off the heating flow and
return isolating valves.
8.2
Domestic Hot Water circuit
•
Turn off the water cock of the system.
•
Install a drain hose and unscrew the
bleed valve located under the storage
vessel.
•
Create an air intake by turning on a hot
water tap.
1
9 Gas conversion
The ISOTWIN CONDENS can be
converted to run on LPG-Propane (G31).
This conversion should only be carried out
by a competent person.
During the conversion to Propane,
•
use of a suitable flue gas analyser is
necessary.
As an option, a chargeable boiler only
commissioning service can be provided
by Saunier Duval Service by calling
telephone number located at the begining
of the manual (customer service).
Tools required to make the conversion
are a 2 mm Allen key and an electricians
screwdriver.
•
Ensure that the appliance supply
pressure = 37 mbar.
Legend
1
Adjustment screw min. power
2
Adjustment screw max. power
9.1
Maximum rate
•
Remove the front panel and the inner
panel
•
Turn screw 2 fully colckwise.
•
Turn screw 2 back anti-clockwise by 5.5
turns.
•
Ensure that the gas analyser is set to
the correct fuel setting - Propane.
34
1
2
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