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810SA/811SA: Installation, Start–Up, Operating and Service and Maintenance Instructions
Table 13 – Gas Rate (Cu Ft./Hr.) (Continued)
SIZE OF TEST
DIAL
SECONDS
FOR 1
1 Cu
2 Cu
5 Cu
REVOLUTION
Ft.
Ft.
30
120
240
600
31
116
232
581
32
113
225
563
33
109
218
545
34
106
212
529
35
103
206
514
36
100
200
500
37
97
195
486
38
95
189
474
39
92
185
462
40
90
180
450
41
88
176
439
42
86
172
429
43
84
167
419
44
82
164
409
45
80
160
400
46
78
157
391
47
76
153
383
48
75
150
375
49
73
147
367
7. Adjust blower off delay The blower off delay has 4 adjustable
settings from 90 sec to 180 sec. The blower off delay jumpers are
located on the furnace control board (see
To change the blower off delay setting, move the jumper from one
set of pins on the control to the pins used for the selected blower off
delay. Factory off delay setting is 120 sec.
8. Set airflow CFM for cooling
Select the desired blower motor speed lead for cooling airflow. See
Table
4-Air
Delivery-CFM
identification.
Check Safety Controls
The flame sensor, gas valve, and pressure switch were all checked in the
Start-up procedure section as part of normal operation.
1. Check Main Limit Switch(es)
This control shuts off combustion control system and energizes
air-circulating blower motor, if furnace overheats. By using this
method to check limit control, it can be established that limit is
functioning properly and will operate if there is a restricted duct
system or motor failure. If limit control does not function during
this test, cause must be determined and corrected.
a. Run furnace for at least 5 minutes.
b. Gradually block off return air with a piece of cardboard or sheet
metal until the limit trips.
c. Unblock return air to permit normal circulation.
d. Burners will re-light when furnace cools down.
2. Check draft safeguard switch.
The purpose of this control is to cause the safe shutdown of the
furnace during certain blocked vent conditions.
a. Verify vent pipe is cool to the touch.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
SIZE OF TEST
DIAL
SECONDS
FOR 1
1 Cu
2 Cu
Ft.
REVOLUTION
Ft.
Ft.
80
45
90
82
44
88
84
43
86
86
42
84
88
41
82
90
40
80
92
39
78
94
38
76
96
38
75
98
37
74
100
36
72
102
35
71
104
35
69
106
34
68
108
33
67
110
33
65
112
32
64
116
31
62
120
30
60
Fig.
28).
(With
Filter)
for
lead
b. Disconnect power to furnace and remove vent connector from
furnace vent elbow.
c. Restore power to furnace and set room thermostat above room
temperature.
5 Cu
d. After normal start-up, allow furnace to operate for 2 minutes,
Ft.
then block vent elbow in furnace 80 percent of vent area with a
piece of flat sheet metal.
225
e. Furnace should cycle off within 2 minutes. If gas does not shut
220
off within 2 minutes, determine reason draft safeguard switch did
not function properly and correct condition.
214
f. Remove blockage from furnace vent elbow.
209
g. Switch will auto-reset when it cools.
h. Re-install vent connector.
205
NOTE: Should switch remain open longer than 3 minutes, furnace
200
control board will lockout the furnace for 3 hours. To reset furnace
control board, turn thermostat below room temperature or from HEAT to
196
OFF and turn 115v power OFF, then back ON.
192
3. Check Pressure Switch
188
This control proves operation of the draft inducer blower.
184
a. Turn off 115-v power to furnace.
b. Disconnect inducer motor lead wires from wire harness.
180
c. Turn on 115-v power to furnace.
178
d. Set thermostat to "call for heat" and wait 1 minute. When
pressure switch is functioning properly, hot surface igniter
173
should NOT glow and control diagnostic light flashes a status
code 31. If hot surface igniter glows when inducer motor is
170
disconnected, shut down furnace immediately.
167
e. Determine reason pressure switch did not function properly and
correct condition.
164
f. Turn off 115-v power to furnace.
161
g. Reconnect inducer motor wires, replace outer door, and turn on
115-v power.
155
h. Blower will run for 90 sec before beginning the call for heat
150
again.
i. Furnace should ignite normally.
Checklist
1. Put away tools and instruments. Clean up debris.
2. Verify that blower OFF-DELAY time is selected as desired.
3. Verify that blower and burner access doors are properly installed.
4. Cycle test furnace with room thermostat.
5. Check operation of accessories per manufacturer's instructions.
6. Review User's Guide with owner.
7. Attach literature packet to furnace.
color
SERVICE AND MAINTENANCE PROCEDURES
Untrained personnel can perform basic maintenance functions such as
cleaning and replacing air filters. All other operations must be performed
by trained service personnel. A qualified service person should inspect
the furnace once a year.
FIRE, INJURY, OR DEATH HAZARD
Failure to follow this warning could result in personal injury, death
and/or property damage.
The ability to properly perform maintenance on this equipment requires
certain knowledge, mechanical skills, tools, and equipment. If you do
not possess these, do not attempt to perform any maintenance on this
equipment other than those procedures recommended in the User's
Manual.
30
WARNING
!
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