Goodman xCVM97 Series, Руководство по установке, Страница: 45 / 64

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Example: Cooling Capacity of 30,000 BTU/hr.
30,000/12,000 = 2.5 Tons
2. Determine the proper air flow for the cooling system. Most
cooling systems are designed to work with air flows between
350 and 450 CFM per ton. Most manufacturers recommend an
air flow of about 400 CFM per ton.
Example: 2.5 tons X 400 CFM per ton = 1000 CFM
The cooling system manufacturer’s instructions must be checked
for required air flow. Any electronic air cleaners or other devices
may require specific quantity of air, consult installation instruc-
tions of those devices for requirements.
3. Knowing the furnace model, locate the high stage cooling air
flow table. Look up the cooling air flow determined in step 2
and find the required cooling speed and adjustment setting.
Example: A *MVM970603BN furnace installed with a 2.5 ton
air conditioning system. The air flow needed is
1000 CFM. Looking at the cooling speed chart for
*MVM970603BN, find the air flow closest to 1000
CFM. A cooling airflow of 1000 CFM can be
attained by selecting the cooling speed “C” and
the adjustment to “normal”.
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.
• 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.
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
*100% CFM sho wn. CFM will vary pro po rtio nally with the gas valve B TU/H input.
*CVM970803BN
*CVM970804CN*
*CVM971005CN*
*MVM971005CN*
*MVM971205DN*
*CVM970603BN
*MVM970603BN*
*MVM970803BN*
*MVM970804CN*
50% CFM
1/2 min
100% CFM
100% CFM
1 min
OFF
OFF
Figure 52B
OFF
100% CFM 100% CFM
1 min
OFF
Figure 52A