Carrier A Series Installation, Start-Up, Operating And Service And Maintenance Instructions page 34

PG80VTLA: Installation, Start-up, Operating and Service and Maintenance Instructions
CAUTION
!
FURNACE OVERHEATING HAZARD
Failure to follow this caution may result in reduced furnace life.
Recheck temperature rise. It must be within limits specified on the
rating plate. Recommended operation is at the mid-point of rise range
or slightly above.
l. Proceed to Step 6, "Set Blower Off Delay" before installing
blower access door.
7. Set Blower Off Delay. (See
a. Remove blower access door if installed.
b. Turn Dip switch SW-7 or SW-8 ON or OFF for desired blower
off delay. (See Fig. 36, Fig. 54
Table 10 – Blower Off Delay Setup Switch
DESIRED HEATING MODE
BLOWER OFF DELAY (SEC.)
90
120
150
180
8. Set thermostat heat anticipator.
a. Mechanical thermostat. Set thermostat heat anticipator to match
the amp. draw of the electrical components in the R-W/W1
circuit. Accurate amp. draw readings can be obtained at the wires
normally connected to thermostat subbase terminals, R and W.
The thermostat anticipator should NOT be in the circuit while
measuring current.
(1.) Set SW1-2 switch on furnace control board to ON.
(2.) Remove thermostat from subbase or from wall.
(3.) Connect an amp. meter across the R and W subbase
terminals or R and W wires at wall. (See
10 TURNS
5.0 AMPS ON AMMETER
EXAMPLE:
10 TURNS AROUND JAWS
Fig. 52 – Amp. Draw Check with Ammeter
(4.) Record amp. draw across terminals when furnace is in low
heat and after blower starts.
(5.) Set heat anticipator on thermostat per thermostat
instructions and install on subbase or wall.
(6.) Turn SW1-2 switch OFF.
(7.) Install blower access door.
b. Electronic thermostat: Set cycle rate for 3 cycles per hr.
9. Set Airflow for Air Conditioning -Single Stage and High Stage
Cooling.
The ECM blower can be adjusted for a range of airflow for Low
Speed or High Speed cooling. See
(With Filter).
The cooling airflow is adjusted by turning Setup switches SW2-6,
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 10.)
and Fig. 59).
SETUP SWITCH
(SW-7 AND -8)
POSITION
SW1-7 SW1-8
OFF OFF
ON OFF
OFF
ON
Fig. 52.
THERMOSTAT SUBBASE
TERMINALS WITH
THERMOSTAT REMOVED
(ANITICIPATOR, CLOCK, ETC.,
MUST BE OUT OF CIRCUIT.)
HOOK-AROUND
AMMETER
R Y W G
FROM UNIT 24-V
CONTROL TERMINALS
0.5 AMPS FOR THERMOSTAT
=
ANTICIPATOR SETTING
Table 4-Air Delivery - CFM
SW2-7 and SW2-8 either ON or OFF. Select the required airflow.
(See Fig. 55).
NOTE: 5.5 ton airflow will truncate at 2200 cfm on applicable models.
For a complete explanation of cooling airflow, refer to the section titled
"Sequence of Operation."
10. The Continuous Fan airflow selection via Setup switches SW2-3,
SW2-4, SW2-5 is also the switch setting for low-speed cooling
when the furnace is used with a two-speed cooling or heat pump
unit. Refer to the Adjustments section (also
setup switch configurations. This setup feature allows continuous
fan airflow or low-cooling airflow to be adjusted.
The continuous fan speed can be further adjusted at the thermostat
using the Continuous Blower Speed Selection from Thermostat
function. Changing the continuous fan speed at the thermostat
DOES NOT change the low speed cooling airflow selected at the
control board. See the section titled Continuous Blower Speed
Selection from Thermostat in the Sequence of Operation section of
this document.
SECONDS G
FOR 1
REVOLUTION
10
ON
11
ON
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
A96316
38
39
40
41
42
43
44
45
46
47
48
49
34
Table 11 – Gas Rate (CU ft./hr)
SIZE OF TEST DIAL
SECONDS
FOR 1
1 Cu 2 Cu 5 Cu
REVOLUTION
Ft. Ft. 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
Fig. 54 and Fig. 55) for
SIZE OF TEST DIAL
1 Cu 2 Cu 5 Cu
Ft. Ft. 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