Owners Manual

6
Specifications subject to change without notice.
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8. Turn ON the electrical supply to the furnace.
Figure 15 Turn On Electrical Supply
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9. Open the external manual gas valve.
Figure 16 Open Valve
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10. Set the room thermostat mode to “heat” and adjust the
setpoint to a temperature slightly above the room
temperature. This will automatically signal the furnace to
start. The combustion air draft inducer motor will start
and the hot surface igniter will energize. When hot, the
igniter will have an orange glow.
11. After about seventeen (17) seconds, the gas valve
permits gas to flow to the main burners where it is ignited.
Hot flames begin to warm the furnace’s heat exchanger.
After a time delay of approximately twenty−five to sixty
(25−60) seconds the furnace blower is switched on.
NOTE: If the main burners fail to ignite, the furnace control
system will go through three more ignition cycles. Then if
burners fail to ignite, the system will lockout. If lockout occurs or
the blower does not come on, shut down your furnace and call
your dealer for service.
12. Set your thermostat to the temperature that satisfies your
comfort requirements.
SUGGESTION: Setting the thermostat back a few
degrees—and compensating for the difference with warmer
clothing—can make a big difference in your fuel consumption
on extremely cold days. The few degrees at the top of your
thermostat “comfort level” are the most costly degrees to
obtain.
When the room temperature drops below the temperature
selected on the thermostat, the furnace will switch on
automatically. When the room temperature reaches the setting
selected on the thermostat, the furnace will be automatically
switched off.
Continuous Fan Operation − Some thermostats have a
“FAN” switch with two (2) selections: AUTO and ON. When
thermostat is set on AUTO, the furnace blower cycles on and
off, controlled by the thermostat. In ON position, the furnace
blower runs continuously except for a forty−two to sixty−two
(42−62) second delay at the “call for heat.” Continuous fan
keeps the temperature level in your home more evenly
balanced. It also continuously filters the indoor air.
SHUTTING DOWN YOUR FURNACE
Should you ever suspect a malfunction in your furnace, you
will need to turn the furnace off. The following procedures
must be followed:
1. Set your room thermostat mode to the lowest
temperature setting and set to OFF. (See Figure 8)
2. Close the external manual gas valve (See Figure 9).
3. Turn off electrical supply to the furnace. (See Figure 10)
4. Remove outer furnace door. (See Figure 11)
5. Turn the switch on the gas control to the OFF position.
(See Figure 12)
6. Replace the outer furnace door. (See Figure 14)
7. If the furnace is being shut down because of a
malfunction, call your dealer as soon as possible.
MINIMUM AND MAXIMUM TEMPERATURE
SETTING FOR YOUR FURNACE
This furnace is designed for minimum continuous return−air
temperature of 60°F (15°C) db or intermittent operation down
to 55°F (15°C) db such as when used with a night setback
thermostat. Return−air temperature must not exceed 80°F
(27°C) db. Failure to follow these return−air temperature limits
may affect reliability of heat exchangers, motors, and controls.
PERFORMING ROUTINE MAINTENANCE
With proper maintenance and care, your furnace will operate
economically and dependably. Instructions for basic
maintenance are found on this and the following pages.
However, before beginning maintenance, follow these safety
precautions:
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Turn off electrical power supply to your furnace before
removing the access doors to service or perform
maintenance.
!
WARNING
CUT HAZARD
Failure to follow this caution may result in personal
injury.
Although special care has been taken to minimize
sharp edges, be extremely careful when handling parts
or reaching into the furnace. Wear safety glasses,
gloves, and appropriate protective clothing.
CAUTION
!
PERSONAL INJURY HAZARD
Failure to follow this caution may result in personal
injury.
Use care when cutting support rods in filters to protect
against flying pieces and sharp rod ends. Wear safety
glasses, gloves, and appropriate protective clothing.
CAUTION
!