Service Manual

PRODUCT DESIGN
18
Note: Junction box location
shown is optional and is for
illustration purposes only.
Electrical Power Directly To Junction Box
JUNCTION BOX
Electrical Power Routed Through Bottom of Unit
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 INJUSRY OR FIRE, USE ONLY COPPER
CONDUCTORS
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
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.