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E. Electrical Connections
WARNING: Open all disconnect switches and
secure in that position before wiring unit.
Failure to do so may result in personal injury or
death from electrical shock.
WARNING: Controls must be protected from
water. Do not allow water to drip on the ignition
system.
NOTE: Before installing any wiring, check the unit
rating plate for supply power voltage and minimum
ampacity.
All electrical connections must conform to the current
edition of: ANSI/NFPA No. 70 National Electrical Code
and applicable state and local codes; in Canada, to the
Canadian Electrical Code, Part 1 CSA Standard C22.1
and applicable provincial and local codes.
Since shipment of unit may require disassembly after
factory check and test, reconnection of some electrical
devices will be required in the
fi
eld. Connect electrical
wires (supplied in factory furnished conduit) to appro-
priate terminals. All leads are tagged to facilitate
fi
eld
connections. See wiring diagram provided with equip-
ment. Complete all wiring to any optional accessories
as shown on unit bill of material and electrical wiring
diagram as required before applying voltage to the unit.
Entry location for all
fi
eld-installed and control wiring is
through the control panel.
If optional disconnect is not furnished with heater, the
fi
eld provided disconnect must be of the proper size
and voltage. Refer to unit rating plate for minimum
circuit ampacity and voltage. The disconnect must be
installed in accordance with Article 430 of the current
edition of ANSI/NFPA No. 70 National Electrical Code.
Check the supply voltage before energizing the unit.
The maximum voltage variation should not exceed
± 10%. Phase voltage unbalance must not exceed 2%.
NOTE: Should any original wire supplied with the
heater have to be replaced, it must be replaced
with wiring material having a temperature rating of
at least 105° C.
REMARQUE : Dans le cas où un quelconque des
câbles livrés avec l'unité devait être remplacé, il
doit être remplacé avec des câbles prévus pour
résister à une chaleur d'au moins 105° C.
F. Field Piping
Gas Piping
All gas piping must be in accordance with the require-
ments outlined in the National Fuel Gas Code - ANSI
Z223.1. It is required that a ground union be installed
adjacent to the manifold for easy servicing. A drip leg
and/or
fi
lter should be provided upstream of the unit’s
inlet gas connection. An additional shut-off must be
located external of the unit’s enclosure. The location of
this valve must comply with all local codes. A 1/8 inch
N.P.T. plugged tapping, accessible for test gauge con-
nection, must be installed immediately upstream of the
gas supply connection to the unit.
WARNING: To avoid equipment damage or
possible personal injury, disconnect gas piping
to this unit until a supply line pressure/leak test
has been completed. Connecting the unit before
completing the pressure/leak test may damage
the unit gas valve and result in a fi re hazard.
DANGER: Never use an open fl ame to detect
gas leaks. Explosive conditions may exist which
would result in personal injury or death.
On vertical units there is a factory installed “Burner
Cleanout” pipe located on the opposite end of the gas
piping compartment. This is a clean out to drain any
condensate that may have collected in the line burner.
WARNING: DO NOT connect supply gas to this
pipe.
The gas line should be supported so that no strain
is placed on the unit. Pipe compounds which are not
soluble to liquid petroleum gases should be used on
threaded joints.
Refer to the heater’s rating plate for determining the
minimum gas supply pressure for obtaining the maxi-
mum gas capacity for which this heater is speci
fi
ed.
Une tuyauterie adéquatement dimensionnée doit être
posée jusqu'à l'unité. Veuillez noter que la pression de
la tuyauterie d'alimentation en gaz doit correspondre
à celle spéci
fi
ée sur la plaque d'identi
fi
cation, lorsque
l'unité fonctionne à plein rendement.
Refer to the heater’s rating plate for determining the
maximum supply pressure to the heater.
The appliance and its individual shutoff valve must
be disconnected from the gas supply piping system
during any pressure testing of that system at test
pressures in excess of 1/2 PSIG.
