c. Re-install screw in hole underneath heat exchanger inlet.
NOTE:
It is very IMPORTANT to re-install the NOx bracket mounting screw.
d. Repeat steps
″
a
″
thru
″
c
″
for each heat exchanger.
13. Re-install burner assembly by:
a. Attach flame sensor to burner assembly.
b. Install HSI and bracket to burner assembly.
c. Insert one-piece burner in slot on sides of burner box and slide burner back in place.
d. Re-attach HSI wires to HSI. Verify Igniter to Burner alignment. (See Fig. 29.)
e. Re-attach Flame sensor wire to Flame Sensor.
14. Reinstall manifold by inserting right end of manifold into opening in right side of burner box.
15. Swing manifold into burner assembly and insert orifices into openings on burners.
16. Verify that orifices are fully inserted into burners and burners are fully seated in burner box.
17. Secure manifold to left side of burner box, verifying that green ground wire is reattached to burner box.
18. Reconnect wires to gas valve per the wiring diagram supplied with the unit.
NOTE:
Failure to attach ground wire to gas manifold on burner box will result in loss of flame signal resulting in a no heat condition.
NOTE:
Use propane-gas resistant pipe dope to prevent gas leaks. DO NOT use Teflon tape.
PROCEDURE 2—CONVERTING AND ADJUSTING SINGLE STAGE AND 2-STAGE GAS VALVE
A.
Convert Single Stage Gas Valve
NOTE:
The following furnaces must have the regulator spring replaced in the gas valve:
1. Be sure main gas and electrical supplies are off.
2. Remove regulator seal cap. (See Fig. 6A or 6B.)
3. Remove adjustment screw and natural gas regulator spring (silver).
4. Install propane gas regulator spring (white) in gas valve.
5. Turn regulator adjustment screw in 6 turns for Fig. 6A and 8.5 turns for Fig. 6B.
NOTE:
DO NOT reinstall regulator seal cap at this time.
Fig. 4—Location of Spoiler Screw
A03234
SPOILER SCREW
BURNER
58STA
310AAV
PG8MAA
58DLA
311AAV
PG8JAA
58STX
310JAV
58DLX
311JAV
—5—
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