PRODUCT DESIGN
45
Rev. 0
Heat Anticipator Setting
The heat anticipator in the room thermostat must be cor-
rectly adjusted to obtain the proper number of cycles per
hour and to prevent “overshooting” of the setting. Set the
heat anticipator setting to 0.7 amps. Follow the thermostat
manufacturer’s instructions on how to adjust the heat an-
ticipator setting and refer to
S-3B Heating Anticipator sec-
tion in the
SERVICING section of this manual.
Drain Trap Priming
The drain trap must be primed prior to furnace startup. To
prime, fill the drain trap with water. This ensures proper
furnace drainage upon startup and prohibits the possibility
of flue gases escaping through the drain system.
Furnace Operation
Purge gas lines of air prior to startup. Be sure not purge
lines into an enclosed burner compartment.
Check for leaks using an approved chloride-free soap and
water solution, an electronic combustible gas detector, or
other approved method. Verify that all required kits (pro-
pane gas, high altitude, etc.) have been appropriately in-
stalled.
Furnace Startup
1. Close the manual gas shut-off valve external to the fur-
nace.
2. Turn off the electrical power to the furnace.
3. Set the room thermostat to the lowest possible setting.
4. Remove the burner compartment door.
Note: This furnace is equipped with an ignition device which
automatically lights the burner. Do not try to light the burner
by hand.
5. Move the furnace gas valve manual control to the OFF
position.
6. Wait five minutes then smell for gas. Be sure check
near the floor as some types of gas are heavier than
air.
7. If you smell gas after five minutes, immediately follow
the instructions on page 6 of this manual. If you do not
smell gas after five minutes, move the furnace gas valve
manual control to the ON position.
8. Replace the burner compartment door.
9. Open the manual gas shut-off valve external to the fur-
nace.
10. Turn on the electrical power to the furnace.
11. Adjust the thermostat to a setting above room tempera-
ture.
12. After the burners are lit, set the thermostat to desired
temperature.
Furnace Shutdown
1. Set the thermostat to the lowest setting.
The integrated ignition control will close the gas valve
and extinguish flame. Following a 15 second delay, the
induced draft blower will be de-energized. After a 60,
90, 120, or 180 second delay period (field selectable),
the circulator blower will be de-energized.
2. Remove the burner compartment door and move the
furnace gas valve manual control to the OFF position.
3. Close the manual gas shut-off valve external to the fur-
nace.
4. Replace the burner compartment door.
Circulator Blower Speeds
This furnace is equipped with a multispeed circulator blower.
This blower provides ease in adjusting blower speeds. The
BLOWER PERFORMANCE SPECIFICATIONS section of
this manual or
Specifications Sheet provides an airflow table,
showing the relationship between airflow (CFM) and exter-
nal static pressure (E.S.P.), for the proper selection of heat-
ing and cooling speeds. The cooling blower speed is shipped
set on HIGH, and the heating blower speed is set as indi-
cated in the
BLOWER PERFORMANCE SPECIFICATIONS
section of this manual or
Specifications Sheet. These blower
speeds should be adjusted by the installer to match the
installation requirements so as to provide the correct heat-
ing temperature rise and the correct cooling CFM.
To adjust the circulator blower speed, proceed as follows:
1. Turn OFF power to the furnace.
2. Remove the blower compartment door to gain access
to the circulator blower wires connected to the integrated
control module.
3. Select the heating and cooling blower speeds that match
the installation requirements from the airflow table
shown in the
BLOWER PERFORMANCE SPECIFICA-
TION section of this manual or the Specifications Sheet.
4. Relocate desired motor leads to the circulator blower
heat and cool speed terminals on the integrated control
module. (Terminals are identified as HEAT and COOL
(hot)). If heating and cooling blower speeds are the
same, a jumper wire must be used between the heat
and cool terminals.
5. Connect all unused blower motor leads to the “PARK”
terminals on the integrated ignition control. Any leads
not connected to the “PARK” terminals must be taped.
6. Replace the blower compartment door.
7. Turn on the electrical power to the furnace.
8. Verify proper temperature rise as outlined in
S-17
CHECKING TEMPERATURE RISE section in the SER-
VICING section of this manual.
