Carrier 58UVB series, Installation, Start-Up, And Operating Instructions Manual

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48
TABLE 13—GAS RATE CU FT/HR
SECONDS SIZE OF TEST DIAL SECONDS SIZE OF TEST DIAL
FOR 1
1 2 5 FOR 1 1 2 5
REVOLUTION
cu ft cu ft cu ft
REVOLUTION
cu ft cu ft cu ft
10
360 720 1800 50 72 144 360
11 327 655 1636 51 71 141 355
12 300 600 1500 52 69 138 346
13 277 555 1385 53 68 136 340
14 257 514 1286 54 67 133 333
15
240 480 1200 55 65 131 327
16 225 450 1125 56 64 129 321
17 212 424 1059 57 63 126 316
18 200 400 1000 58 62 124 310
19 189 379 947 59 61 122 305
20
180 360 900 60 60 120 300
21 171 343 857 62 58 116 290
22 164 327 818 64 56 112 281
23 157 313 783 66 54 109 273
24 150 300 750 68 53 106 265
25
144 288 720 70 51 103 257
26 138 277 692 72 50 100 250
27 133 267 667 74 48 97 243
28 129 257 643 76 47 95 237
29 124 248 621 78 46 92 231
30
120 240 600 80 45 90 225
31 116 232 581 82 44 88 220
32 113 225 563 84 43 86 214
33 109 218 545 86 42 84 209
34 106 212 529 88 41 82 205
35
103 206 514 90 40 80 200
36 100 200 500 92 39 78 196
37 97 195 486 94 38 76 192
38 95 189 474 96 38 75 188
39 92 185 462 98 37 74 184
40
90 180 450 100 36 72 180
41 88 176 439 102 35 71 178
42 86 172 429 104 35 69 173
43 84 167 419 106 34 68 170
44 82 164 409 108 33 67 167
45
80 160 400 110 33 65 164
46 78 157 391 112 32 64 161
47 76 153 383 116 31 62 155
48 75 150 375 120 30 60 150
49 73 147 367
3. This furnace is capable of automatically providing proper
airflow to maintain the temperature rise within the range
specified on furnace rating plate. If temperature rise is
outside this range, proceed as follows:
a. Check gas input for low-- and high--heat operation.
b. Check derate for altitude if applicable.
c. Check all return and supply ducts for excessive
restrictions causing static pressure greater than 0.5--in.
wc.
d. Ensure Low Heat Rise Adjust switch SW1--3 on
furnace control is in ON position when a bypass
humidifier is used. (See Fig. 33 for switch location.)
e. Check Troubleshooting Guide for Variable--Speed
2--Stage Electronic Condensing Furnaces Series 100.
SET THERMOSTAT HEAT ANTICIPATOR
When using a non--electronic thermostat, the thermostat heat
anticipator must be set to match the amp draw of components in
the R--W/W1 circuit. Accurate amp draw measurements can be
obtained only at the thermostat subbase terminals R and W.
The thermostat and anticipator should NOT be in the circuit while
measuring current. If thermostat has no subbase, the thermostat
must be disconnected from R and W/W1 wires during current
measurement.
Fig. 54 illustrates an easy method of obtaining thermostat amp
draw measurements. The amp reading should be taken after
blower motor has started and furnace is operating in low--heat.
1. To operate furnace in low--heat, turn setup switch SW1--2
to ON position (See Fig. 33) and connect ammeter leads
across thermostat subbase R--W.
2. See thermostat manufacturer’s instructions for adjusting
the heat anticipator and for varying heating cycle length.
NOTE
: When using an electronic thermostat, set cycle rate for 3
cycles per hr.
3. Return setup switch SW1--2 to OFF position and replace
thermostat on subbase.
Step 7
—
Check Safety Controls
This section covers the safety controls that must be checked
before the installation is complete. The flame sensor, gas valve,
and pressure switches were all checked in the Start--up procedure
section as part of normal operation.
CHECK PRIMARY LIMIT CONTROL
This control shuts off the gas control system and energizes the
air--circulating blower motor if furnace overheats.
58U
VB