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ELECTRICAL INSTALLATION:
All wiring shall be installed with the requirements of the authorities having jurisdiction. DO NOT CUT
HOLES IN THE BOTTOM OF OUTDOOR UNITS AS THE FLOOR OF THE UNIT HAS BEEN MADE
WATERPROOF. Field wiring, internal wiring diagrams and unit operating functions are included in
the control cabinet of the unit. The power requirements are indicated on the unit name plate. Where
field wiring of the control circuit is required, take care to size the field wiring for a maximum 10%
voltage drop. The VA rating of the transformer can be assumed to be the maximum load.
Reconnect all disconnected wiring on units that were split in 2 or more sections for shipment.
When connecting a power supply to a three phase unit, take care that the three phase wiring gives
the correct rotation of all motors and blowers. The electrical conduit outlet in the control panel must
be plugged to prevent moist building air from migrating to the control panel. Do Not install any
devices in a manner that interfere with access to the unit approval label.
Replacement wiring must be equivalent to original wire. See field wiring diagram for requirements
for shielded or twisted pair wire for solid state devices.
START-UP CHECK LIST:
The start-up and operation must be done in accordance with safe practices. State and Provincial
regulations require that service mechanics who work on combustion equipment must be licensed.
The unit should NOT be started or serviced by unqualified personnel.
1. Ensure that all shipping material has been removed.
2. Set all electrical switches and main unit disconnect switch in OFF position.
3. Close all unit manual valves and field piping valves.
4. Remove tie-down bolts on blower vibration isolators (if supplied).
5. Check all bearings, drive and blower set screws for tightness.
6. Check drive alignment and belt tension. Refer to Maintenance, page 14.
7. Purge all the air from the gas lines. Check all connections for leaks and correct. Ensure that
the inlet pressure agrees with the name plate.
8. Inspect all electrical wiring, both field and factory installed, for loose connections.
9. Turn unit disconnect switch ON (control switch is still off) and check the supply voltage.
Voltage must be within 10% of name plate rating. If not, consult the power company and
have the voltage condition corrected before continuing unit start-up.
10. Set all temperature controls to the temperature setting indicated on the wiring diagram. If
no settings are noted follow guideline on page 13.
11. Set thermostat or controller in the
off position and turn unit control switch on .
12. Check all fan motors for correct rotation. If incorrect, reverse rotation.
(10 pages)
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