Greenheck PVF/PVG Indirect Gas-Fired Heat Modules (474645) - Manual (Page 13)

Indirect Gas-Fired Heat Modules 13
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Installation of Gas Piping
IMPORTANT
All gas piping must be installed in accordance
with the latest edition of the National Fuel Gas
Code ANSI/Z223.1 and any local codes that may
apply. In Canada, the equipment shall be installed
in accordance with the Installation Code for Gas
Burning Appliances and Equipment (CGA B149) and
Provincial Regulations for the class. Authorities having
jurisdiction should be consulted before installations
are made.
IMPORTANT
All piping should be clean and free of any foreign
material. Foreign material entering the gas train can
cause damage.
WARNING
All components of this or any other gas fired heating
unit must be leak-tested prior to placing the unit into
operation. A soap and water solution should be used
to perform this test. NEVER test for gas leaks with an
open flame.
IMPORTANT
Do NOT connect the unit to gas types other than
what is specified and do NOT connect the unit to
gas pressures that are outside of the pressure range
shown on the label.
WARNING
When leak testing pressures equal to or less than
14 in. wg (3.5 kPa), first close the field-installed
shutoff valve to isolate the unit from the gas supply
line.
WARNING
When leak testing pressures above 14 in. wg
(3.5 kPa), close the field-installed shutoff valve,
disconnect the furnace and its gas train from the gas
supply line and plug the supply line before testing.
NOTE
When connecting the gas supply, the length of the
run must be considered in determining the pipe size
to avoid excessive pressure drop. Refer to a Gas
Engineer’s Handbook for gas pipe capacities.
NOTE
Each furnace has a single 3/4-inch connection.
Installation of Control Wiring
Disconnect power supply before making any wiring
connections to prevent electrical shock and equipment
damage.
All appliances must be wired strictly in accordance with
the wiring diagram furnished with the unit. Any wiring
different from the diagram could result in a hazard to
persons and property.
Any original factory wiring that requires replacement
must be replaced with wiring material having a
temperature rating of at least 105° C.
1. Installation of wiring must conform with local building
codes. In the absence of local building codes,
installation must conform to the National Electrical
Code and ANSI/NFPA 70 - Latest Edition. Unit must
be electrically grounded in conformance with this
code. In Canada, wiring must comply with CSA
C22.1, Canadian Electrical Code.
2. All furnaces are provided with a wiring diagram
located on the inside of the access panel or door to
the unit’s main control center. Refer to this diagram
for all wiring connections.
Installation of Discharge Air Sensor
Every furnace has a Discharge Air Sensor included.
It is typically attached to the terminal strip on the
furnace control center. If the ventilating unit has a
microprocessor controller, it will be connected to the
microprocessor controller. See the unit-specific wiring
diagram. Install sensor in the supply air duct, as far
downstream as possible for accurate temperature
measurement. Additional wire may be added to the
sensor as necessary.