International comfort products N92ESN Installation Instructions Manual page 81

10. Turn on gas and electrical supplies to furnace.
11. Check furnace operation through 2 complete heat operating
cycles. Look at burners. Burner flames should be clear blue,
almost transparent. See Fig. 62.
12. Check for gas leaks.
WARNING
!
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury, death, and/or property damage.
Never purge a gas line into a combustion chamber. 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.
13. Replace main furnace door.
Secondary Heat Exchangers
The condensing side (inside) of the secondary heat exchanger
CANNOT be serviced or inspected without complete removal of
the heat exchanger assembly. Detailed information on heat
exchanger removal can be obtained from your Distributor.
WINTERIZATION
CAUTION
!
UNIT AND PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in unit component or
property damage.
If the furnace is installed in an unconditioned space where the
ambient temperatures may be 32_ F (0_ C) or lower, freeze
protection measures must be taken to prevent minor property
or product damage.
Since the furnace uses a condensing heat exchanger, some water
will accumulate in the unit as a result of the heat transfer process.
Therefore, once it has been operated, it cannot be turned off and
left off for an extended period of time when temperatures will
reach 32_F (0_C) or lower unless winterized. Follow these
procedures to winterize your furnace:
CAUTION
!
UNIT COMPONENT DAMAGE HAZARD
Failure to follow this caution may result in damage to the
furnace and other property damage.
Do not use ethylene glycol (automotive antifreeze coolant or
equivalent). Failure of plastic components may occur.
1. Obtain propylene glycol (RV/swimming pool antifreeze or
equivalent).
2. Turn off gas and electrical supplies to your furnace.
3. Remove furnace control door.
4. Remove the top unused rubber plug from the port on the
collector box opposite the condensate trap. See Fig 58.
5. Connect a field supplied 3/8- -in. (9.5- -mm) ID tube to the
open port on the collector box.
6. Insert a field supplied funnel into the tube.
440 01 4541 00
7. Pour one quart (liter) of anti- -freeze solution into the funnel/
8. Replace the rubber plug in the port on the collector box.
9. Remove the middle unused rubber plug from the port on the
10. Repeat Steps 5 through 8.
11. If a condensate pump is used, check with pump manufacturer
12. Replace main door.
13. When furnace is re- -started, flush condensate pump with clear
14. Propylene glycol need not be removed before re- -starting
Specifications subject to change without notice.
tube. Antifreeze should run through the inducer housing,
overfill condensate trap and flow to an open drain.
collector box opposite the condensate trap. See Fig. 58.
to verify pump is safe for use with antifreeze used. Allow
pump to start and pump anti- -freeze to open drain.
water to check for proper operation before re- -starting furnace.
furnace.
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