PRODUCT DESIGN
17
WARNING
DO NOT EXCEED THE MAXIMUM OVERCURRENT
DEVICE SIZE SHOWN ON THE UNIT DATA PLATE.
All line voltage connections must be made through weather
proof fittings. All exterior power supply and ground wiring
must be in approved weather proof conduit. Low voltage
wiring from the unit control panel to the thermostat requires
coded cable. See the following figures for ground level and
rooftop wiring.
JUNCTION BOX
The unit transformer is connected for 230V operation. If the
unit is to operate on 208V, reconnect the transformer primary
lead and the induced draft blower leads as shown on the unit
wiring diagram.
WARNING
TO AVOID THE RISK OF PROPERTY DAMAGE,
PERSONAL INJURY OR FIRE, USE ONLY COPPER
CONDUCTORS.
If it is necessary for the installer to supply additional line
voltage wiring to the inside of the package unit, the wiring
must comply with all local codes. This wiring must have a
minimum temperature rating of 105°C and must be routed
away from the burner compartment. All line voltage splices
must be made inside the unit control box.
GAS SUPPLY AND PIPING
CAUTION
THIS PACKAGE GAS UNIT IS FACTORY SET TO
OPERATE ON NATURAL GAS AT THE ALTITUDES
SHOWN ON THE RATING PLATE. IF OPERATION
ON PROPANE IS REQUIRED, OBTAIN AND INSTALL
THE PROPER CONVERSION KIT(S) BEFORE
OPERATING THIS UNIT. FAILURE TO DO SO
MAY RESULT IN UNSATISFACTORY OPERATION
AND/OR EQUIPMENT DAMAGE.
The rating plate is stamped with the model number, type of
gas, and gas input rating. Make sure the unit is equipped to
operate on the type of gas available.
Inlet Gas Pressure
Natural
Min. 5.0" W.C., Max. 10.0" W.C.
Propane
Min. 11.0" W.C., Max. 13.0" W.C.
Inlet Gas Pressure Must Not Exceed the Maximum Value
Shown in the table above.
The minimum supply pressure must not be varied downward
because this could lead to unreliable ignition. In addition, gas
input to the burners must not exceed the rated input shown
on the rating plate. Overfiring of the unit could result in
premature heat exchanger failure.
GAS PIPING
CAUTION
TO AVOID POSSIBLE UNSATISFACTORY OPERATION
OR EQUIPMENT DAMAGE DUE TO UNDERFIRING OF
EQUIPMENT, DO NOT UNDERSIZE THE NATURAL
GAS/PROPANE PIPING FROM THE METER/TANK TO
THE FURNACE. WHEN SIZING A TRUNK LINE PER
THE TABLES, INCLUDE ALL APPLIANCES ON THAT
LINE THAT COULD BE OPERATED SIMULTANEOUSLY.
