INSTALLATION
SECTION 2- INDUCED-COMBUSTION, HOT-SURFACE IGNITION, SINGLE STAGE, TWO-STAGE AND VARIABLE-SPEED,
40-INCH NON-CONDENSING FURNACES MODELS
PROCEDURE 1—INSTALL MAIN BURNER ORIFICES
NOTE:
See Fig. 12A or 12B for component location.
1. Turn off furnace gas and electrical supplies.
2. Remove control access door.
3. Turn furnace gas valve switch to OFF position.
4. Remove gas supply pipe from gas valve (if installed).
CAUTION: UNIT OPERATION HAZARD
Label all wires prior to disconnection when servicing controls. Wiring errors will cause improper and dangerous operation.
ATTENTION: D’EQUIPEMENT DANGER D’OPERATION
Toute erreur de câblage peut être une source de danger et de panne. Lors des opérations d’entretien des commandes, étiqueter tous
les fils avant de les déconnecter.
5. Remove wires from gas valve. Note location for reassembly.
6. Remove wires from flame sensor and flame rollout safety switch(es).
7. Disconnect harness from hot surface igniter.
8. Remove the 4 screws that secure the gas manifold to the burner assembly. Note the location of the green ground wire attached to the
manifold for reassembly.
9. Remove the manifold.
NOTE:
Models 58DXT, 58UXT, 58UXV, 330JAV, 331JAV and 333JAV are supplied with NOX emissions-reduction devices necessary for use
with Natural Gas in NOx emissions-regulated areas.
For 58UXT, 58DXT, 58UHV, 330JAV, 331JAV and 333BAV, remove NOX emissions-reducing device as follows: Using needle nose pliers,
remove coil from bracket on each heat exchanger cell inlet plate. (See Fig. 13.)
CAUTION: UNIT DAMAGE HAZARD
Failure to follow this caution may result in premature unit failure.
Furnace models 58DXT, 58UXT, 58UXV, 330JAV, 331JAV, and 333JAV, must have low NOx coils removed prior to operating furnace
on propane gas.
10. Remove and discard orifices from manifold.
11. Refer to conversion kit rating plate 327697-206 (Single Stage, See Fig. 14) or 327697-207 (Two Stage, See Fig. 15.) to determine main
burner orifice size.
Furnace gas input rate on rating plate is for installations at altitudes up to 2000 ft. In the U.S.A., the input rating for altitudes above 2000 ft must
be reduced by 4 percent for each 1000 ft above sea level.
In Canada, the input rating must be derated by 10 percent for altitudes of 2000 ft to 4500 ft above sea level.
The Conversion Kit Rating Plate accounts for high altitude derate.
12. Install main burner orifices. Do not use Teflon tape. Finger-tighten orifices at least 1 full turn to prevent cross threading and then tighten
with wrench. There are enough orifices in each kit for largest furnace. Discard extra orifices. Orifices of other sizes must be field supplied
and are available through your local distributor.
13. For units equipped with NOx devices, NOx coil must be removed. (See Fig. 13.)
CAUTION: UNIT DAMAGE HAZARD
Failure to follow this caution may result in excessive burner noise and misdirection of burner flames. This may result in flame
impingement of the burners and the heat exchangers, causing failures.
DO NOT re-drill burner orifices. Improper drilling may result in burrs, out-of-round holes, etc. Obtain new orifices if orifice size must
be changed. (See Fig. 1.)
SINGLE-STAGE MODELS
TWO-STAGE MODELS
VARIABLE SPEED MODELS
58PAV
383KAV
PG8UAA
58TUA
330AAV
58UHV
333BAV
58WAV
395CAV
PG8DAA
58TMA
331AAV
58UXV
333JAV
58RAV
373LAV
393AAV
58UXT
330JAV
58ZAV
376CAV
58YAV
58DXT
331JAV
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Страница 32: ... 2004 CAC BDP 7310 W Morris St Indianapolis IN 46231 agganp31 32 Catalog No 63GA NP11 ...