Nordyne Single Package Gas Heating/Electric Cooling Unit User's Information Manual page 5

Heating Operation
1. Set the thermostat system switch to Heat
and the thermostat fan switch to AUTO.
(See Figure 1)
2. Set the thermostat temperature selector to
the desired temperature level. Some ther-
mostat models will have two temperature
selectors, one marked "C" to set the de-
sired cooling temperature, and a second
marked "H" to set the desired heating tem-
perature. The indoor blower and heating
module blower will cycle on and off to
maintain the indoor temperature at the
desired heating level.
! WARNING:
Should overheating occur, or the gas
supply fail to shut off, shut off the
manual gas valve to the unit before
shutting off the electrical supply.
NOTE: This unit is equipped with a manual-
reset flame roll-out limit switch. This switch acts
to verify that the burner flame is being drawn into
the heat exchanger tubes. If the flame is not
being drawn into the tubes, the flame roll-out
switch will open within several seconds. When
this switch opens, the gas valve will de-ener-
gize, which will stop the flow of gas. Further-
more, both the combustion inducer and the
circulating air blower will energize and continue
to operate until the switch is closed. Do not reset
the flame roll-out switch before identifying and
correcting the fault condition that caused the
switch to open. If the switch will not reset or
continues to open, immediately contact a quali-
fied serviceman to identify and repair the prob-
lem.
System Shutdown
Set the thermostat system switch to OFF and
the thermostat fan switch to AUTO (See Figure
1). The system will not operate, regardless of
the thermostat temperature selector(s) setting.
To Operate the Indoor Blower
Continuously
Set the thermostat fan switch to ON (may be
called CONT on some thermostat models). (See
Figure 1)
The indoor blower will start immediately, and
will run continually until the fan switch is reset to
AUTO.
The continuous indoor blower operation can be
obtained with the thermostat system switch set
in any position, including OFF.
The continuous indoor blower operation is typi-
cally used to circulate the indoor air to equalize
a temperature unbalance due to a solar load,
cooking, or fireplace operation.
System Maintenance
! CAUTION:
Be certain the electrical power to the
unit is disconnected and the gas is
shut off before doing the following
recommended maintenance.
Proper maintenance is most important to achieve
the best performance from the appliance and
should be performed by a qualified service
technician at least once a year. Follow the
maintenance schedule and the instructions be-
low for years of safe, trouble free operation.
Do not place combustible materials on or
against the cabinet.
Do not store gasoline or any other flam-
mable vapors and liquids in the vicinity of
the unit.
Annually inspect the physical support of the
furnace to ensure that it is physically sound
without sagging, cracks, gaps, etc., around
the base so as to provide a seal between
the support and the base.
Annually inspect the return-air connection
to ensure that it is physically sound and is
still sealed to the casing of the unit.
Annually inspect the unit, ductwork, and
vent system for signs of physical deteriora-
tion.
Always replace the doors on the unit after
servicing or cleaning/changing the filters.
Do not operate the unit without all doors
and covers in place.
Avoid operating the unit when windows and
doors are open.
Be sure that the thermostat is properly
installed and is not being affected by drafts
or heat from lamps or other appliances.
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