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combustion
air intake
Fig. 20 Flue gas outlet & combustion air intake
DESCRIPTION
flue gas outlet
combustion air intake
9
WARNING: Read the requirements, instructions and prohi-
bitions detailed below carefully, since non-compliance with
them may be result in substantial property damage, severe
personal injury, death, or the appliance's malfunction.
9
WARNING: Check that pipes and joints are not damaged.
9
WARNING: Joint seals must be executed with materials that
withstand the condensate's acidity and the temperatures of
the appliance's flue gases. They must be approved joint meth-
ods as stated by the vent manufacturer's installation instruc-
tions for this type of condensing product. Failure to comply
may result in substantial property damage, severe personal
injury or death.
9
WARNING: When installing flue pipes, always bear in mind the
direction of the flue gases and of possible condensate flows.
9
WARNING: Inadequate or incorrectly sized flue gas pipes may
increase combustion noise, create condensate extraction is-
sues and negatively impact on combustion parameters.
9
WARNING: Check that pipes are suitably far (min. 20") from
flammable liquids.
9
CAUTION: Make sure that condensation is not built up along
the exhaust flue pipe. For this purpose, provide a slope of at
least 3 degrees towards the appliance in horizontal sections.
In case of cascade application, if the horizontal or vertical sec-
tion is longer than 13ft (10m) in a cascade vent application,
a condensate siphon drain must be provided at the base of
the pipe. The height of the siphon must be at least equal to
the value "H" (see figure below). The siphon discharge must
then lead to a drain with an air gap between drain and the
condensate trap. (See section "Preparation for the condensate
drain"
9
WARNING: It is prohibited to block or section the flue gas ex-
haust pipe or the combustion air intake pipe, if any.
flue gas outlet
Array AR SE
4" (102mm)
Ø
4" (102mm)
Ø
25
0
WARNING: It is prohibited to use condensate pipes that are
not designed for this application, as the condensates acidity
would damage them quickly.
3.14 Gas Type Conversion
The heating unit is factory preset for operating with natural gas.
This set-up can be changed using the conversion kits supplied by
the manufacturer, on demand.
9
DANGER: To prevent risks of personal injury and proper-
ty damage, this conversion shall only be performed by
a trained and certified installer in accordance with the
manufacturer's
instructions
and requirements of the authority having jurisdiction.
If the information in these instructions is not followed exactly, or
the installation, adjustment, modification, operation or main-
tenance is carried out by an unqualified person, a fire, explo-
sion or generation of excessive levels of carbon monoxide may
result causing property damage, personal injury or loss of life.
Before carrying out electrical work, disconnect the appli-
ance from the power supply at the emergency shutoff switch
or by disengaging the heating system circuit breaker. Take
appropriate measures to prevent accidental reconnection.
The installer is responsible for the proper conversion of this
appliance. The conversion is not complete until the operation
of the converted appliance is checked as specified in these
instructions.
The gas-air ratio must always be set on the basis of a CO
reading taken at maximum nominal output and minimum nomi-
nal output using an electronic flue gas analyzer. The desired high-
fire excess O2 level is 5.1% for natural gas.
Natural Gas to Propane Conversion Kit for AR 399 SE: Part #20185234
Natural Gas to Propane Conversion Kit for AR 500 SE: Part #20185235
Switching from NATURAL GAS to LP
− Close the gas shutoff valve
− Disconnect the electric power supply from the boiler
9
WARNING: To avoid electrical shock, it is mandatory to discon-
nect the boiler from the power supply using an external cir-
cuit breaker or disconnect switch.
− Open the front panels
− Change the mixer with new version present in the Conver-
sion specific Kit.
− Unscrew the nuts (1) that connect the fan to the upper
flange of the heat exchanger
Fig. 21 NG mixer removal
INSTALLATION
and
all
applicable
codes
or O
2
2
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