Bryant 830CA, Installation, Start--Up, Operating, And Service And Maintenance

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9. Set Airflow for Continuous Fan / Low Speed Cooling
Airflow The ECM blower motor can be adjusted for
continuous fan speeds different than heating or cooling fan
speed. See Table 11 -- Air Delivery -- CFM (With Filter).
Select the required continuous fan airflow from Fig. 42.
The continuous fan speed is also the switch setting for low
speed cooling when furnace is used with a 2--speed
cooling unit. Adjust the continuous fan CFM to match the
airflow required for low speed cooling. Select the required
airflow from Fig. 42. For airflow at 400 CFM per ton, turn
Setup SW1--5 ON (See Fig. 42) The airflow selected for
low speed cooling will also be the airflow used for
continuous fan.
The continuous fan speed can be further adjusted at the
thermostat using the “Comfort Fan” select function.
Changing the continuous fan speed at the thermostat
DOES NOT change the low speed cooling airflow
selected at the control board.
Table 11 – Air Delivery -- CFM (With Filter)
(SW1---5 and SW4---3 set to OFF, except as indicated. See notes 1 and 2)
Size: 36040C17
Clg/CF Switch settings External Static Pressure (ESP)
Clg Switches SW2---3 SW2---2 SW2---1 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Clg Default: OFF OFF OFF 1275 1310 1305 1315 1310 1305 1305 1295 1290 1270
CF Switches SW3---3 SW3---2 SW3---1
Low---Clg Default: OFF OFF OFF 1275 1310 1305 1315 1310 1305 1305 1295 1290 1270
Cooling Airflow
(SW2)
Low---Cooling
Airflow (SW3)
OFF OFF ON 530 545 545 535 505 495 485 See Note 4
OFF ON OFF 715 705 730 730 735 735 740 725 720 695
OFF ON ON 870 910 925 925 935 935 925 915 910 900
ON OFF OFF 1100 1090 1080 1110 1120 1120 1110 1110 1100 1095
ON OFF ON 1275 1310 1305 1315 1310 1305 1305 1295 1290 1270
ON ON OFF 1445 1480 1480 1480 1475 1455 1415 1375 1335 1295
ON ON ON 1445 1480 1480 1480 1475 1455 1415 1375 1335 1295
Maximum Clg Airflow
2
1635 1605 1565 1525 1490 1455 1415 1375 1335 1295
CF Switches SW3---3 SW3---2 SW3---1
Cont. Fan Default: OFF OFF OFF 530 545 545 535 505 495 485 See Note 4
Continuous Fan
Airflow
(SW3)
OFF OFF ON 530 545 545 535 505 495 485 See Note 4
OFF ON OFF 715 705 730 730 735 735 740 725 720 695
OFF ON ON 870 910 925 925 935 935 925 915 910 900
ON OFF OFF 1100 1090 1080 1110 1120 1120 1110 1110 1100 1095
ON OFF ON 1100 1090 1080 1110 1120 1120 1110 1110 1100 1095
ON ON OFF 1100 1090 1080 1110 1120 1120 1110 1110 1100 1095
ON ON ON 1100 1090 1080 1110 1120 1120 1110 1110 1100 1095
Heating (SW1) Heating Airflow
3
760 765 790 790 800 800 800 790 775 755
Size: 48060C17
Clg/CF Switch settings External Static Pressure (ESP)
Clg Switches SW2---3 SW2---2 SW2---1 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Clg Default: OFF OFF OFF 1460 1475 1500 1500 1480 1440 1395 1355 1310 1255
CF Switches SW3---3 SW3---2 SW3---1
Low---Clg Default: OFF OFF OFF 540 565 555 555 535 See Note 4
Cooling Airflow
(SW2)
Low---Cooling
Airflow (SW3)
OFF OFF ON 540 565 555 555 535 See Note 4
OFF ON OFF 715 735 745 760 765 See Note 4
OFF ON ON 865 910 935 950 965 955 950 955 955 945
ON OFF OFF 1120 1125 1130 1145 1160 1165 1165 1160 1150 1150
ON OFF ON 1275 1295 1315 1335 1340 1345 1340 1335 1310 1255
ON ON OFF 1460 1475 1500 1500 1480 1440 1395 1355 1310 1255
ON ON ON 1460 1475 1500 1500 1480 1440 1395 1355 1310 1255
Maximum Clg Airflow
2
1620 1595 1565 1525 1480 1440 1395 1355 1310 1255
CF Switches SW3---3 SW3---2 SW3---1
Cont. Fan Default: OFF OFF OFF 540 565 555 555 535 See Note 4
Continuous Fan
Airflow
(SW3)
OFF OFF ON 540 565 555 555 535 See Note 4
OFF ON OFF 715 735 745 760 765 See Note 4
OFF ON ON 865 910 935 950 965 955 950 955 955 945
ON OFF OFF 1120 1125 1130 1145 1160 1165 1165 1160 1150 1150
ON OFF ON 1275 1295 1315 1335 1340 1345 1340 1335 1310 1255
ON ON OFF 1460 1475 1500 1500 1480 1440 1395 1355 1310 1255
ON ON ON 1460 1475 1500 1500 1480 1440 1395 1355 1310 1255
Heating (SW1) Heating Airflow
3
960 995 1015 1020 1030 1050 1055 1060 1055 1045