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Page
GAS SUPPLY AND GAS PIPE SIZING
-General-
•
The minimum and maximum inlet gas pressures are:
•
Inlet gas pressures that fall outside the range of values listed above may adversely a
ff
ect the
performance of the micro-boiler. These pressures are measured when the micro-boiler is in full
opera
tion.
•
Inlet gas pressure must not exceed the above maximum values; gas pressure above the
specified
range
will cause dangerous opera
ting
c
onditions
and damage to the unit.
•
Un
til
tes
ting of the main
gas line supply pressure is completed, ensure the gas line to the micro-boiler
is disconnected to avoid any damage to the micro-boiler.
1. Install a manual gas shuto
ff
valve between the micro-boiler and the gas supply line.
2. When the gas c
onnections
are completed, it is necessary to perform a gas leak test either by applying
soapy water to all gas
fittings
and observing for bubbles or by using a gas leak det
ection
device.
•
The micro-boiler and its individual shuto
ff
valve must be disconnected from the gas supply
piping system during any pressure tes
ting
of that system at test pressures in excess of 1/2 psi
(3.5 kPa).
•
The micro-boiler must be isolated from the gas supply piping system by closing its individual
manual shuto
ff
valve during any pressure tes
ting
of the gas supply piping system at test
pressures equal to or less than 1/2 psi (3.5 kPa).
3. Always purge the gas line of any debris and/or water before c
onnecting
to the gas inlet.
Size the gas pipe appropriately to supply the necessary volume of gas required
for the micro-boiler using ANSI Z223.1/NFPA 54 in the USA or CAN/CSA B149.1 in
Canada or local codes. Otherwise,
fl
ow c
apabilities
and output temperatures will
be limited.
NOTICE
Gas type
Inlet gas pressure
Natural Gas
Min. 5.0” W.C. (1.24 kPa) – Max. 10.5” W.C. (2.61 kPa)
Propane
Min. 8.0” W.C. (1.99 kPa)
– Max. 14.0” W.C. (3.48 kPa)
•
Check that the type of gas matches the ra
ting
plate
fi
rst.
•
Ensure that any and all gas regulators used are opera
tin
g properly and
providing gas pressures within the
specified
range shown below. Excess gas
inlet pressure may cause serious accidents.
•
Conversion of this unit from natural gas to propane or vice versa will void
all warranty. Contact your local distributor to get the correct unit for your
gas type.
The manufacturer is not liable for any property and/or personal
damage r
esulting
from gas conversions
.
CAUTION