45
Model
Tap
Low
Stage
Cool
High Stage
Cool
100%
Heat
*CFM
Low heat
CFM for
2 stage
A
398
599
953
667
B
557
817
1059
740
C
696
1007
1158
808
D
810
1212
1260
881
A
403
629
1202
855
B
540
806
1316
923
C
705
1023
1389
1033
D
819
1230
1396
1063
A
513
789
1228
867
B
660
967
1337
939
C
791
1182
1430
1016
D
913
1375
1516
1077
A
564
820
1818
1256
B
784
1133
1870
1292
C
982
1464
1910
1316
D
1259
1736
1957
1358
A
547
867
1891
1329
B
831
1160
1940
1362
C
1020
1467
1968
1390
D
1278
1910
2028
1440
A
433
656
938
687
B
541
790
950
751
C
686
972
986
814
D
806
1195
992
874
A
405
624
1057
758
B
549
808
1146
815
C
678
994
1256
882
D
784
1177
1349
946
A
556
837
1234
889
B
714
1022
1325
944
C
838
1206
1442
1019
D
991
1475
1528
1068
A
524
784
1759
1209
B
744
1078
1797
1249
C
927
1388
1840
1277
D
1185
1766
1881
1300
*MVM970603BN*
*MVM970803BN*
*MVM970804CN*
*MVM971005CN*
*MVM971205DN*
*CVM970603BN
*100% CFM sho wn. CFM will vary pro po rtio nally with the gas valve B TU/H input.
*CVM970803BN
*CVM970804CN*
*CVM971005CN*
4. Continuous fan speed is selectable at 25%, 50%, 75%
or 100% of the furnace’s maximum airflow capability.
Example:
If the furnace’s maximum airflow capability
is 2000 CFM, the continuous fan speed at
25% will be 0.25 x 2000 or 500 CFM.
5. Locate the blower speed selection DIP switches on the
integrated control module. Select the desired “cooling”
speed tap by positioning switches 1 and 2 appropriately.
Select the desired “adjust” tap by positioning switches
9 and 10 appropriately. Refer to the DIP switch chart
for switch positions and their corresponding taps. Verify
CFM by noting the number displayed on the dual 7-
segment LED display.
6. The multi-speed circulator blower also offers several
custom ON/OFF ramping profiles for cooling. These
profiles may be used to enhance cooling performance
and increase comfort level. The ramping profiles
are selected using DIP switches 7 and 8. Refer to
the bullet points below for a description of each
ramping profile. Verify CFM by noting the number
displayed on the dual 7-segment LED display.
•
Profile A
provides only an OFF delay of one (1) minute at
100% of the cooling demand airflow.
OFF
100% CFM
100% CFM
1 min
OFF
Figure 53A
•
Profile B
ramps up to full cooling demand airflow by
first stepping up to 50% of the full demand for 30
seconds. The motor then ramps to 100% of the required
airflow. A one (1) minute OFF delay at 100% of the
cooling airflow is provided.
50% CFM
1/2 min
100% CFM
100% CFM
1 min
OFF
OFF
Figure 53B
•
Profile C
ramps up to 85% of the full cooling demand
airflow and operates there for approximately 7 1/2
minutes. The otor then steps up to the full demand
airflow. Profile C also has a one (1) minute 100% OFF
delay.
100% CFM
OFF
OFF
Figure 53C
•
Profile D
ramps up to 50% of the demand for 1/2 minute,
then ramps to 85% of the full cooling demand airflow
and operates there for approximately 7 1/2 minutes.
The motor then steps up to the full demand airflow.
Profile D has a 1/2 minute at 50% airflow OFF delay.
OFF
OFF
Figure 53D
Airflow Tables
7. Select the heating speed for your model from the heating
speed table in this manual. The “adjust” setting
(already established by the cooling speed selection)
determines which set of speeds are available. The
selected speed must provide a temperature rise within
the rise range listed with the particular model.
8. Select the desired “heating” speed tap by positioning
switches 3 and 4 appropriately. Refer to the airflow
table. Verify CFM by noting the number displayed on
the dual 7-segment LED display.
