Set Temperature Rise - Bryant 352AAV Installation, Start-Up, And Operating Instructions Manual

Table 16 – Altitude Derate Multiplier for USA.
ALTITUDE PERCENT OF
FT (M) DERATE
0–2000
0
(0 --- 610)
2001–3000
4---6
(610 --- 914)
3001–4000
6---8
(914 --- 1219)
4001–5000
8---10
(1219 --- 1524)
5001–6000
10---12
1524 --- 1829)
6001–7000
12---14
(1829 --- 2134)
7001–8000
14---16
(2134 --- 2438)
8001–9000
16---18
(2438 --- 2743)
9001–10,000
18---20
(2743 --- 3048)
* Derate multiplier factors are based on midpoint altitude for altitude range.
Table 17 – Gas Rate (CU FT/HR)
SIZE OF TEST
SECONDS
DIAL
FOR 1
REVOLUTION
1 2 5
Cu Ft Cu Ft Cu Ft
10
360 720 1800
11
327 655 1636
12
300 600 1500
13
277 555 1385
14
257 514 1286
15
240 480 1200
16
225 450 1125
17
212 424 1059
18
200 400 1000
19
189 379 947
20
180 360 900
21
171 343 857
22
164 327 818
23
157 313 783
24
150 300 750
25
144 288 720
26
138 277 692
27
133 267 667
28
129 257 643
29
124 248 621
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
DERATE MULTIPLIER
FACTOR*
1.00
0.95
0.93
0.91
0.89
0.87
0.85
0.83
0.81
SIZE OF TEST
SECONDS
DIAL
FOR 1
REVOLUTION
1 2 5
Cu Ft Cu Ft Cu Ft
50
72 144 360
51
71 141 355
52
69 138 346
53
68 136 340
54
67 133 333
55
65 131 327
56
64 129 321
57
63 126 316
58
62 124 310
59
61 122 305
60
60 120 300
62
58 116 290
64
56 112 281
66
54 109 273
68
53 106 265
70
51 103 257
72
50 100 250
74
48 97 243
76
47 95 237
78
46 92 231
80
45 90 225
82
44 88 220
84
43 86 214
86
42 84 209
88
41 82 205
90
40 80 200
92
39 78 196
94
38 76 192
96
38 75 188
98
37 74 184
100
36 72 180
102
35 71 178
104
35 69 173
106
34 68 170
108
33 67 167
110
33 65 164
112
32 64 161
116
31 62 155
120
30 60 150
124
29 58 145

SET TEMPERATURE RISE

CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in overheating the
heat exchangers or condensing flue gases in heat exchanger
areas not designed for condensate.
Temperature rise must be within limits specified on furnace
rating plate. Recommended operation is at midpoint of rise
range or slightly above.
Place SW-1 in ON position. Jumper R to W/W1 and W2 to check
high-gas-heat temperature
temperature rise, remove jumper to W2. Determine air
temperature rise for both high and low gas heat. Do not exceed
temperature rise ranges specified on unit rating plate for high and
low gas heat.
This furnace must operate within the temperature rise ranges
specified on the furnace rating plate. Determine the air
temperature as follows:
a. Place duct thermometers in return and supply ducts as
close to furnace as possible. Be sure thermometers do
not "see" heat exchangers so that radiant heat does not
affect thermometer readings. This is particularly
important with straight run ducts.
b. When thermometer readings stabilize, subtract
return-air temperature from supply-air temperature to
determine temperature rise.
If the temperature rise is outside this range, check the following:
a. Gas input for low-and high gas heat operation.
b. Derate for altitude if applicable.
c. Return and supply ducts for excessive restrictions
causing static pressures greater than 0.50-in. wc.
d. Adjust temperature rise by adjusting blower speed.
Increase blower speed to reduce temperature rise.
Decrease blower speed to increase temperature rise.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Disconnect 115-v electrical power before changing speed tap.
For high-heat, the following connections can be made at HI
HEAT on control:
a. Med-high (Yellow)
b. Med (Orange) - - Available only on 5-speed motors.
Factory setting for these motors.
c. Med-Low(Blue) - - Do NOT use for HI GAS-HEAT
on 80K & 120K Btuh input models. Factory setting
for 4-speed motors.
59
rise. To check low-gas-heat