Carrier 59MN7A Installation, Start-Up, Operating And Service And Maintenance Instructions page 31

Table 9 - - Cooling
Clg/CF Switch Settings
Unit Size
SWx-3
100-22
Clg Default: OFF
CF Default: OFF
OFF
OFF
Cooling (SW2)
OFF
Cont Fan (SW3)
ON
ON
ON
ON
Clg SW2: Maximum Clg Airflow
Maximum Heat Airflow
Heating
Intermediate Heat Airflow
(SW1)
Minimum Heat Airflow
Clg/CF Switch Settings
Unit Size
SWx-3
120-22
Clg Default: OFF
CF Default: OFF
OFF
OFF
OFF
Cooling (SW2)
ON
Cont Fan (SW3)
ON
ON
ON
Clg SW2:
Maximum Clg Airflow
Maximum Heat Airflow
Heating
Intermediate Heat Airflow
(SW1)
Minimum Heat Airflow
1. Nominal 350 CFM/ton cooling airflow is delivered with SW1--5 and SW4--3 set to OFF.
Set SW1--5 to ON for nominal 400 CFM/ton (+15% airflow).
Set SW4--3 to ON for nominal 325 CFM/ton (--7% airflow).
Set both SW1--5 and SW4--3 to ON for nominal 370 CFM/ton (+7% airflow).
The above adjustments in airflow are subject to motor horsepower range/capacity.
2. Maximum cooling airflow is achieved when switches SW2--1, SW2--2, SW2--3 and SW1--5 are set to ON, and SW4--3 is set to OFF.
3. All heating CFM's are when low/medium heat rise adjustment switch (SW1--3) and comfort/efficiency adjustment switch (SW1--4) are both
set to OFF.
4. Ductwork must be sized for high--heating CFM within the operational range of ESP. Operation within the blank areas of the chart is not
recommended because high--heat operation will be above 1.0 ESP.
5. All airflows on 21" casing size furnaces are 5% less on side return only installations.
6. Return air above 1800 CFM on 24.5" casing sizes requires two sides, one side and bottom or bottom only , to allow sufficient airflow to the furnace.
4
and Heating Air Delivery - - CFM (Bottom Return
SWx-2 SWx-1 0.1 0.2
OFF OFF 1820 1825
OFF OFF 750 740
OFF ON 750 740
ON OFF 900 900
ON ON 1070 1075
OFF OFF 1280 1285
OFF ON 1440 1445
ON OFF 1820 1825
ON ON 2135 2140
2
2160 2165
3
1570 1575
3
950 955
3
755 745
SWx-2 SWx-1 0.1 0.2
OFF OFF 1850 1855
OFF OFF 930 925
OFF ON 765 745
ON OFF 930 925
ON ON 1095 1100
OFF OFF 1265 1255
OFF ON 1465 1455
ON OFF 1850 1855
ON ON 2200 2200
2
2200 2200
3
1815 1820
3
1095 1100
3
905 900
5
With Filter) (Continued)
External Static Pressure (ESP)
0.3 0.4 0.5 0.6
1840 1845 1840 1835
745 730 715
745 730 715
915 910 905
1095 1095 1090 1085
1305 1305 1310 1305
1465 1465 1470 1485
1840 1845 1840 1835
2140 2135 2140 2130
2175 2170 2160 2150
1595 1595 1600 1605
965 975 970
750 735 720
External Static Pressure (ESP)
0.3 0.4 0.5 0.6
1860 1855 1850 1830
915 900 885
740 705 680
915 900 885
1110 1105 1085
1265 1280 1275 1285
1470 1465 1465 1470
1860 1855 1850 1830
2200 2190 2185 2170
2200 2190 2185 2170
1825 1820 1815 1795
1110 1105 1085
890 875 855
31
0.7 0.8 0.9 1.0
1825 1805 1780 1770
See note 4
See note 4
See note 4
1095 1080 1065 1070
1295 1300 1290 1285
1480 1485 1475 1460
1825 1805 1780 1770
2115 2100 2070 2015
2135 2120 2065 2020
1600 1600 1590 1575
See note 4
See note 4
0.7 0.8 0.9 1.0
1805 1775 1750 1730
See note 4
See note 4
See note 4
See note 4
1270 1260 1250 1230
1455 1450 1435 1415
1805 1775 1750 1730
2145 2085 1990 1890
2145 2085 1990 1890
1775 1745 1720 1700
See note 4
See note 4