W:\ELECTRICAL\INSTRUCT\FURNACE\FURNACE GENERAL INSTRUCTIONS 2011.DOC
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3. Increase the temperature to 900°F and hold for two (2) hours or until smoke and
moisture no longer escape from the open door.
4. Turn off the furnace and allow it to sit overnight with the door slightly open.
SECOND DAY
:
1. With the furnace door slightly open, heat the furnace again to 900°F and hold for
two (2) hours or until smoke and moisture no longer escape from the open door.
2. Increase to 1200°F and hold for two (2) hours or until smoke and moisture no
longer escape from the open door.
3. If the furnaces= maximum temperature is 1200°F, hold at 1200°F for two (2)
additional hours or until smoke and moisture no longer escape from the open
door.
4. Increase to 1600°F and hold for 2 hour. Close the furnace door and continue at
1600°F for 1-1/2 hours. At the end of this time period, increase to the maximum
operating temperature anticipated and hold for two (2) hours. If no higher
operating temperature is anticipated, continue to run at 1600°F for two (2) hours
or until smoke and moisture no longer escape from the open door.
4-3
The excess temperature limit interlock should be connected to your alarm system.
The wiring schematic indicates where the alarm relay should be located for this alarm
circuit.
4-4
After the installation is completed, replace all doors, covers and guards that had been
removed for shipment or installation. At no time should equipment be operated if
covers or guards are open, removed or partially closed.
4-5
When the equipment is placed in operation, check all blowers for proper rotation.
Rotation directional arrows are located near each blower. Three phase motors may
be reversed by interchanging any two (2) of the three (3) wires which supply power to
the furnace. Do not switch leads at the motor starter or motor. Single phase motors
are correctly set at the factory but correct rotation should still be confirmed.
4-6
The exhaust rate must be checked on furnaces equipped with a powered forced
exhauster to handle flammable solvent vapors or products of combustion from gas
heated equipment. This must be done at the outlet of the furnace before the exhaust
enters the flue. It must meet or exceed the minimum rate indicated on the Furnace
Design Data Form located on the side of the furnace. If it is necessary to open the
exhaust damper to increase the exhaust rate, it must be cutoff or locked in position to
prevent accidental closing.
4-7
Check incoming voltage against that shown on the nameplate.
4-8
Check operating current against the amperage shown on the nameplate.
4-9
On gas heated equipment, purge gas line to furnace of all air and check gas pressure
against that shown on the furnace nameplate.
4-10
Tighten all terminals, especially on power connections, to minimize terminal and
component failure due to poor contact. Connections should be checked periodically
for tightness and signs of overheating.
