Advertisement
6. Turn furnace gas valve switch to ON position.
7. Turn Setup switch SW 1-2 to ON.
8. Verify Set-up switch SW 4-2 is turned OFF.
9. Jumper the R to W/W1 and W2 thermostat connections at
the furnace control board.
10. After the main burners ignite and the blower starts, con-
firm Maximum Heat manifold pressure is correct, based
on the manifold pressure table. (See Fig. 3.)
11. To adjust the Maximum Heat manifold pressure, slowly
turn the rotary adjustment switch counterclockwise to de-
crease manifold pressure or clockwise to increase manifold
pressure.
12. Turn rotary adjustment switch no more than one click per
second until you obtain the required manifold pressure.
Main burner flame should be clear blue, almost transparent.
To adjust manifold pressure to obtain input rate for Minimum
Heat:
1. Remove the jumper from W2 at the thermostat connec-
tions at the furnace control board control.
2. Wait until the burners and the blower transitions to Minim-
um Heat.
3. Verify the Minimum Heat manifold pressure is correct,
based on the manifold pressure table on Conversion Kit
Rating Plate.
4. To adjust the Minimum Heat manifold pressure, Slowly
turn the rotary adjustment switch counterclockwise to de-
crease manifold pressure or clockwise to increase manifold
pressure.
5. Turn rotary adjustment switch no more than one click per
second until you obtain the required manifold pressure.
This adjustment will not affect the previous Maximum
Heat adjustment.
After adjusting the manifold pressure, allow the furnace to
operate an additional 5 minutes before checking Minimum Heat
Temperature rise.
Furnace must operate within ranges of temperature rise specified
on the furnace rating plate. Determine air temperature rise as
follows:
1. Place thermometers in return and supply ducts as near fur-
nace as possible. Be sure thermometers DO NOT see heat
exchanger so that radiant heat does not affect readings.
This practice is particularly important with straight-run
ducts.
2. When thermometer readings stabilize, subtract return-air
temperature from supply-air temperature to determine air
temperature rise.
3. Allow the furnace to run for at least 10 minutes before
checking Temperature Rise.
If the temperature rise is too high or too low in Minimum Heat:
1. Remove jumpers from R and W/W1.
2. Wait until the blower off delay is completed.
3. Turn 115 VAC power off.
4. Check the position of Heat Rise Adjustment Switch
SW1-3. When set to ON, airflow is raised 18% higher for
Minimum Heat and Intermediate Heat. Factory default po-
sition is OFF.
5. Turn 115 VAC power on.
6. Jumper R to W/W1 and W2.
7. After burners ignite and blower starts allow the furnace to
run for at least 10 minutes before checking Temperature
Rise.
Maximum Heat Temperature Rise
If the temperature rise is too high or too low in Maximum Heat:
1. Remove jumpers from R, W1 and W2.
2. Wait until the blower off delay is completed.
3. Turn 115 VAC power off.
4. Check the position of the Efficiency/Comfort Adjustment
switch SW1-4. When set to OFF (Efficiency Mode), air-
flow is 10% higher for Minimum, 7.5% for Intermediate
Heat, and 17.5% for Maximum Heat. Factory default posi-
tion is ON (Comfort Mode).
5. Turn 115 VAC power on.
6. Re-check Minimum Heat Temperature Rise.
7. Remove jumpers across thermostat connections to termin-
ate the call for heat. Wait until the blower off delay is com-
pleted.
8. Turn gas supply manual shutoff valve to OFF position.
9. Turn off furnace power supply.
10. Remove manometer from the outlet pressure tap of the gas
valve.
11. Apply pipe dope sparingly to 1/8- -in. NPT plug and re-in-
stall outlet pressure tap on the gas valve.
12. Re-install plastic cap over rotary adjustment switch on the
top of the gas valve.
LABEL APPLICATION
1. Fill in Conversion Responsibility Label 340071- -205 and
apply to Blower Access Door of furnace as shown. (See
Fig. 15.) Date, name, and address of organization making
this conversion are required.
2. Attach Conversion Rating Plate Label 340071- -201 to out-
er door of furnace, see Fig. 16.
3. Attach Gas Control Conversion Label 340071- -202 to gas
valve. DO NOT use 340071- -203, which is similar.
12
Advertisement
