Checklist - Bryant 311AAV Installation, Start-Up, Operating And Service And Maintenance Instructions

THERMOSTAT SUBBASE
TERMINALS WITH
THERMOSTAT REMOVED
(ANITICIPATOR, CLOCK, ETC.,
MUST BE OUT OF CIRCUIT.)
10 TURNS
FROM UNIT 24-V
CONTROL TERMINALS
EXAMPLE: 5.0 AMPS ON AMMETER
10 TURNS AROUND JAWS
Fig. 54—Amp Draw Check With Ammeter
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.
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.
d. After normal start-up, allow furnace to operate for 2
minutes, then block vent elbow in furnace 80 percent of
vent area with a piece of flat sheet metal.
→
e. Furnace should cycle off within 2 minutes. If gas does not
shut off within 2 minutes, determine reason draft safeguard
switch did not function properly and correct condition.
→
f. Remove blockage from furnace vent elbow.
g. Switch will auto-reset when it cools.
→
h. Re-install vent connector.
→
NOTE: Should switch remain open longer than 3 minutes,
furnace control board will lockout the furnace for 3 hours. To reset
furnace control board, turn thermostat below room temperature or
from HEAT to OFF and turn 115v power OFF, then back ON.
3. Check Pressure Switch
This control proves operation of the draft inducer blower.
a. Turn off 115-v power to furnace.
b. Disconnect inducer motor lead wires from wire harness.
c. Turn on 115-v power to furnace.
d. Set thermostat to "call for heat" and wait 1 minute. When
pressure switch is functioning properly, hot surface igniter
should NOT glow and control diagnostic light flashes a
status code 32. If hot surface igniter glows when inducer
motor is disconnected, shut down furnace immediately.
e. Determine reason pressure switch did not function properly
and correct condition.
f. Turn off 115-v power to furnace.
g. Reconnect inducer motor wires, replace outer door, and
turn on 115-v power.
HOOK-AROUND
AMMETER
R Y W G
= 0.5 AMPS FOR THERMOSTAT
ANTICIPATOR SETTING
Table 10–GAS RATE (CU FT/HR)
SECONDS
FOR 1
REVOLUTION
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
A96316
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
→
h. Blower will run for 90 sec before beginning the call for
heat again.
→
i. Furnace should ignite normally.
Step 5—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 instruc-
tions.
6. Review User's Guide with owner.
7. Attach literature packet to furnace.
37
SIZE OF TEST DIAL
SECONDS
FOR 1
1 2 5
REVOLUTION
Cu Ft Cu Ft Cu Ft
360 720 1800 50
327 655 1636 51
300 600 1500 52
277 555 1385 53
257 514 1286 54
240 480 1200 55
225 450 1125 56
212 424 1059 57
200 400 1000 58
189 379 947 59
180 360 900 60
171 343 857 62
164 327 818 64
157 313 783 66
150 300 750 68
144 288 720 70
138 277 692 72
133 267 667 74
129 257 643 76
124 248 621 78
120 240 600 80
116 232 581 82
113 225 563 84
109 218 545 86
106 212 529 88
103 206 514 90
100 200 500 92
97 195 486 94
95 189 474 96
92 185 462 98
90 180 450 100
88 176 439 102
86 172 429 104
84 167 419 106
82 164 409 108
80 160 400 110
78 157 391 112
76 153 383 116
75 150 375 120
73 147 367
SIZE OF TEST DIAL
1 2 5
Cu Ft Cu Ft Cu Ft
72 144 360
71 141 355
69 138 346
68 136 340
67 133 333
65 131 327
64 129 321
63 126 316
62 124 310
61 122 305
60 120 300
58 116 290
56 112 281
54 109 273
53 106 265
51 103 257
50 100 250
48 97 243
47 95 237
46 92 231
45 90 225
44 88 220
43 86 214
42 84 209
41 82 205
40 80 200
39 78 196
38 76 192
38 75 188
37 74 184
36 72 180
35 71 178
35 69 173
34 68 170
33 67 167
33 65 164
32 64 161
31 62 155
30 60 150