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5 - INSTALLATION - Mounting & gas and water connections
Figure 12 - Gas supply
piping
5.12 - Gas supply
piping
WARNING!!! Check that the type
and the pressure of the gas
supplied correspond with those
required for the boiler as stated
on the rating plate. Never use a
gas different than that stated on
the boiler rating plate. Failure
to comply with this warning can
result in a fi re or explosion causing
extensive property damage, severe
personal injury or death!
If the gas type and/or the supply
pressure do not match those stated
on the boiler rating plate the boiler
must be converted to the type
of gas and/or supply pressure
available. A conversion kit is
supplied together with the boiler.
The boiler comes from the factory
ready to be piped to the gas supply.
The National Fuel Gas Code, ANSI
Z223.1/NFPA 54 and local codes
for gas piping requirements and
sizing must be followed.
Install a manual gas shutoff valve
and drip leg as shown in Figure 12.
The gas supply piping to the boiler
must be properly sized to guarantee
that the gas supply meets the
maximum requirements. If more
than one appliance is supplied by
the same gas supply pipe, the gas
supply piping must be sized based
on the maximum possible demand.
Do not neglect the pressure drop due
to pipe fi ttings. Table 1 below, should
be used in conjunction with Table 2
below, to ensure that the gas supply
piping is sized properly. See section
14 for values of "maximum gas supply
pressure" and "minimum gas supply
pressure" and also section 11.7.
19
Before installation a thorough
internal cleaning of the gas supply
line should be performed. Figure
9 shows the positioning of the gas
connection on the heater.
The boiler and its gas connection
must be leak tested before placing
the boiler in operation.
To avoid damaging the gas control,
perform a leak test at a pressure
of no greater than 20 in W.C. (50
mbar).
WARNING!!! Never use an open
fl ame to test for gas leaks. Always
use an approved leak detection
method. Failure to comply with
this WARNING could result in an
explosion!
The boiler and its individual shutoff
valve must be disconnected from
the gas supply piping during any
pressure testing at test pressures in
excess of 1/2 psi (3.5 kPa).
The boiler must be isolated from
the gas supply piping by closing
its individual manual shutoff valve
during any pressure testing at test
pressures equal to or less than 1/2
psi (3.5 kPa).
5.13 - Operating at
high altitudes
For installations in the United States,
the boiler is rated for operation at
altitudes up to 2,000 ft (609 m). For
installations at higher altitudes in
the United States, follow local codes
or, in the absence of local codes,
follow ANSI Z223.1/NFPA No. 54,
The National Fuel Gas Code. For
installations in Canada, the boiler is
rated for installations up to 2,000 ft
(609 m). For installations above this
altitude, follow local/provincial codes.
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