20
9. With a back-up wrench on the inlet boss of the gas valve,
finish tightening the gas pipe to the gas valve.
10. Turn gas on at electric switch on gas valve.
CHECK INLET GAS PRESSURE
UNIT DAMAGE HAZARD
Failure to follow this caution may result in unit damage.
DO NOT operate furnace more than one minute to check
inlet gas pressure, as conversion is not complete at this time.
CAUTION
!
NOTE
: This kit is to be used only when inlet gas pressure is
between 4.5--in. W.C. and 13.6--in. W.C.
1. Verify manometer is connected to inlet pressure tap on gas
valve.
2. Turn on furnace power supply.
3. Turn gas supply manual shutoff valve to ON position.
4. Turn furnace gas valve switch to ON position.
5. Turn Setup Switch SW1--2 on furnace control ON (see
Fig. 28).
Model Plug
Setup Switches SW1,
1 thru 8
SW2 A/C Air Flow
Setup Switches
AC 1 through AC 3
OAT
PL9
A B C D
PL4
HUM
PL7
W2
Y1
DHUM
SW4
SW2
SW3
Communication
Connection
24 VAC
HUM Output
(0.5 AMP
MAX)
SW3 Continuous Fan
(CF) airflow setup
switches CF 1 through
CF 3
Outside Air Thermistor
SW4
A11471
Fig. 28 -- Furnace Control
6. Jumper R--W/W1 and R--W2 thermostat connections on
control.
7. When main burners ignite, confirm inlet gas pressure is
between 4.5--in. W.C. and 13.6--in. W.C.
8. Remove jumper across R--W/W1 and R--W2 thermostat
connections to terminate call for heat.
9. Turn furnace gas valve switch to OFF position.
10. Turn gas supply manual shutoff valve to OFF position.
11. Turn off furnace power supply.
12. Remove manometer.
13. Apply pipe dope sparingly to the 1/8--in. NPT pipe plug
and install in the 1/8--in. tapped inlet--pressure tap opening
in the gas valve. DO NOT over--tighten. Check for gas
leaks after gas supply has been turned on.
CHECK FURNACE AND MAKE ADJUSTMENTS
FIRE AND EXPLOSION HAZARD
Failure to follow this warning could result in personal injury
and/or death.
NEVER test for gas leaks with an open flame. Use a
commercially available soap solution made specifically for
the detection of leaks to check all connections. A fire or
explosion may result causing property damage, personal
injury or loss of life.
!
WARNING
RISQUE D’EXPLOSION ET D’INCENDIE
Le fait de ne pas suivre cet avertissement pourrait entraîner des
dommages corporels et / ou la mort.
Ne jamais examiner pour les fuites de gaz avec une flamme
vive. Utilisez plutôt un savon fait specifiquement pour la
détection des fuites de gaz pour verifier tous les connections.
Un incendie ou une explosion peut entrainer des dommages
matériels, des blessures ou la mort.
!
AVERTISSEMENT
FIRE, EXPLOSION, ELECTRICAL SHOCK
HAZARD
Failure to follow this warning could result in personal
injury, death or property damage.
Gas supply MUST be shut off before disconnecting
electrical power and proceeding with conversion.
!
WARNING
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow this warning could result in personal
injury, death or property damage.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position and
install a lockout tag. There may be more than one
disconnect switch. Lock out and tag switch with a suitable
warning label. Verify proper operation after servicing.
!
WARNING
1. Be sure main gas and electric supplies to furnace are off.
2. Remove 1/8-in. NPT pipe plug from manifold pressure tap
on downstream side of gas valve.
3. Attach manometer to manifold pressure tap on gas valve.
(See Fig. 25.)
4. Turn gas supply manual shutoff valve to ON position.
5. Turn furnace gas valve switch to ON position.
6. Check all threaded pipe connections for gas leaks.
7. Turn on furnace power supply.
GAS INPUT RATE INFORMATION
See furnace rating plate on blower door for input rate. The input
rate for natural gas is determined by manifold pressure and orifice
size.
