Bard Bayrd Furnace 403293A - Manual (Page 35)

SICTIOM 27 » CHICKING CONTROLS.
Equipment Needed: Save time by getting these tools betöre
you start: Item number(s) 3 and 1fi listed in Section 10.
Before leaving the work site, check to see that all controls
are functioning properly.
Follow these steps:
1. Turn off electricity at electrical disconnect switch
next to furnace.
2. Turn gas control knob clockwise -> to OFF position.
3. Connect a "U" tube water manometer to gas control
outlet (manifold) pressure tap.
4. Set room thermostat to its highest temperature.
5. Turn on electricity at electrical disconnect switch
located next to furnace. Electronic ignition lockout
module should start to spark pilot ignitor, but pilot
burner should not light. Manifold pressure should
remain at zero.
6. Electronic ignition lockout module should spark pi­
lot ignitor for given lockout time of module and go
into lockout mode. Lockout time for Honeywell
S8600H is 90 seconds maximum.
NOTE: Honeywell electronic ignition lockout mod­
ule will stop sparking whan module locks out.
7. Turn off electricity at electrical disconnect switch
located next to furnace. Turn gas control knob
counter-clockwise <- to ON position. Wait 10 sec­
onds for electronic ignition lockout module to reset.
8. Turn on electricity at electrical disconnect switch
located next to furnace. Pilot should light from spadt
and ignite burners. Wait for main blower to start.
NOTE: To purge gas tines, it may be necessary to
operate furnace through more than one lockout cycle
at start-up.
9. Cycle electrical disconnect switch next to furnace
on and off. Watch at least three ignition cycles. Pilot
should light from spark and light main burners within
10 seconds.
10. Burner flames should look the same with circulation
blower on and off. If not, turn gas control knob
clockwise -> to OFF position.
11. Turn off electricity at electrical disconnect switch
located next to furnace. Disconnect all room ther­
mostat wires at control box terminal strip. To start
blower on cooling speed, jump terminal strip, termi­
nals "R" and "G". Turn on electricity at electrical
disconnect switch next to furnace.
12. Using a match flame check for air leaks between
bulkhead and blower deck, under burners and up
each side where bulkhead mounts to casing. Tighten
screws until air teaks stop.
13. Turn off electricity at electrical disconnect switch
located next to furnace. Remove jumper from termi­
nal strip, termirwils "R" and "G". Reconnect all room
thermostat wires to original terminal strip, terminals.
See Section 13.
14. Remove "U” tube water manometer from gas control
and replace outlet pressure tap. Turn gas control
knob counter-clockwise
<- to ON position.
15. Turn on electricity at electrical disconnect switch
next to furnace. With main burners and blower op­
erating, block off all return air grilles to restrict return
air. Wait for primary limit control to cycle burners
off.
16. Remove all restrictions from return air grilles. When
primary limit cools, burners should automatically
reignite.
17. Set room thermostat to desired setting.
SRCTION 20 BLOWER TIMINGS.
Equipment Needed: Save lime by getting these tools before
you start; Item number(s) 5 listed in Section 10.
1. Blower on-time setting of heating relay is fixed at
20 to 30 seconds and is not field adjustable.
2. Blower off-time setting is adjustable through a range
of 60 to 180 seconds. Blower off-time is factory set
at 180 seconds.
3. If a shorter blower off-time is desired:
a. Turn off electricity at electrical disconnect switch
located next to furnace.
b. Remove control box cover and locate heating
relay in control box. Turn the dial counter
clockwise <- to desired setting.
FIGURE 40
4. Install control box cover.
5. Turn on electricity at electrical disconnect switch
next to furnace.
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