8. Remove manometer and replace manifold pressure tap plug.
NOTE:
Use propane-gas-resistant pipe dope to prevent gas leaks. DO NOT use Teflon tape.
9. Turn furnace gas valve control switch or control knob to ON position.
10. Turn on furnace power supply.
11. Set room thermostat to call for heat.
12. Check manifold pressure tap plug for gas leaks when main burners ignite.
13. Observe unit operation through 2 complete heating cycles. See sequence of operation in furnace Installation, Start-up and Operating
Instructions.
14. Set room thermostat to desired temperature. Go to Procedure 8.
B.
Two-Stage and Variable Speed Furnaces
1. Turn switch #2 (low heat) on furnace control to ON (See. Fig. 17A and 17B.)
2. Jumper R and W/W1 thermostat connection on furnace control.
3. Check manifold orifices for gas leaks when main burners ignite.
4. Adjust gas manifold pressure. Refer to Conversion Kit Rating Plate #327697-207 (Two-Stage).
a. Remove caps that conceal adjustment screws for gas-valve regulators. (See Fig. 16B.)
b. Adjust low-heat input rate manifold pressure for propane gas. (See kit rating plate 327697-207, see Fig. 15) Turn low-heat adjusting
screw (5/64 hex allen wrench) counterclockwise (out) to decrease input rate or clockwise (in) to increase input rate.
c. Jumper R and W2 thermostat connections on control. This keeps furnace in high-heat.
d. Adjust high-heat input rate manifold pressure for propane gas. (See kit rating plate 327697-207) Turn high-heat adjusting screw (5/64
hex allen wrench) counterclockwise (out) to decrease input rate or clockwise (in) to increase input rate.
e. Remove jumper across R and W2 after high-heat adjustment.
f. Replace caps that conceal gas-valve-regulator adjustment screws
5. Remove jumper across R, W1 and W2 thermostat connections to terminate call for heat.
6. Turn setup switch to SW-2 to OFF position.
7. Turn furnace gas valve switch to OFF.
8. Turn off furnace power supply.
9. Remove manometer and replace manifold pressure tap plug.
NOTE:
Use propane-gas-resistant pipe dope to prevent gas leaks. DO NOT use Teflon tape.
10. Turn on furnace power supply.
11. Turn furnace gas valve switch to ON position.
12. Set room thermostat to call for heat.
1
2
3
4
5
6
7
8
9
PR2
L2
COM
PR1
L1
EAC-2
EAC-1
H
I-
COO
L
HI-GAS
-HEAT
LO-GAS
-HEAT
PARK
3
FU1
SEC-1
SEC-2
1
1
2
3
4
5
6
7
8
9
10
11
12
MASTER SLAVE
TWIN
TEST
LED
G
R
Y/Y2
W/W1
COM
24 V
W2
1
ON
OFF
1
2
3
4
FURNACE AND
BLOWER OFF DELAY
SETUP SWITCHES
24-VOLT
THERMOSTAT
TERMINALS
EAC - ELECTRONIC
AIR CLEANER
(115-VAC 1 AMP MAX)
3-AMP
FUSE
LED -
DIAGNOSTIC
LIGHT
TWIN / TEST
TERMINAL
HUM -
HUMIDIFIER
(24-VAC 0.5
AMP MAX)
HUM
A93348
Fig. 17A—Furnace Control for 2-Stage
Condensing Furnace and 2-Stage/Variable-Speed
Non-Condensing Furnaces
BLOWER-
OFF
DELAY
LOW
HEAT
(ADAPTIVE
ALGORITHM)
HIGH
HEAT
ONLY
4
3
2
OFF
ON
1
A96402
Fig. 17B—Setup Switches on Furnace Control for 2-Stage
Condensing Furnace and 2-Stage/Variable Speed
Non-Condensing Furnaces (Factory Settings Shown)
—18—
