AIC COILMASTER 35 Manual

h e a t i n g s y s t e m s
COILMASTER 35 - 45
Conversion of the appliance from one
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gas type to another can only be per-
formed by a qualified professional.
Gas conversion shall be performed
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according to applicable local reg-
ulations. It is prohibited in some
countries. Perform conversion ac-
cording to the gas category spec-
ified for your country on the appli-
ance data plate.
If the boiler is intended to be used
î
with liquefied gas (propane), in-
stalling the boiler below ground
level can be hazardous and prohib-
ited in some countries. Please refer
to applicable local regulations for
installation requirements.
If the boiler is already installed before
î
conversion, the boiler must be turned
off, the power supply must be dis-
connected through the external fuse
or circuit breaker, and the gas supply
to the gas valve must be closed.
Summary
This procedure consists in replacing the facto-
ry-installed air-gas mixer for G20 natural gas at-
tached to the fan, by an air-gas mixer for either
G25 natural gas or G31 liquefied gas (Propane).
See Fig. 1 opposite for air-gas mixer location.
See table below for air-gas mixer top and bottom
injector sizes:
Models Top - Bottom
CM 35 / 45 4.3 - 5.4
G25 G31
Top - Bottom
3.3 - 3.4
Gas Conversion Procedure
Make sure that the gas type and pres-
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sure of the distribution network are com-
patible with the appliance, as per the
information on the appliance data plate.
If the boiler was running before conversion,
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allow it to cool down before performing any
task.
After gas conversion is performed,
i
control the gas pressure and consump-
tion at appliance start up, and perform
the adjustment procedures provided in
"Adjustment of Fan Speeds" on page
3 and "Combustion Adjustment"
on page 4.
Fig. 1. Component Location
Air-gas mixer (Venturi)
EN