661693-UIM-E-1212
12 Johnson Controls Unitary Products
SECTION IX: MAINTENANCE
Filters must be cleaned or replaced when they become dirty. Inspect at
least once per month. The frequency of cleaning depends upon the
hours of operation and the local atmospheric conditions. Clean filters
keep unit efficiency high.
COIL CLEANING
If the coil needs to be cleaned, it should be wash with a evaportor coil
cleaner. Follow directions from coil cleaner.
LUBRICATION
The bearings of the blower motor are permanently lubricated.
CONDENSATE DRAINS
During the cooling season check the condensate drain lines to be sure
that condensate is flowing from the primary drain but not from the sec-
ondary drain. If condensate ever flows from the secondary drain the unit
should be promptly shut off and the condensate pan and drains cleaned
to insure a free flowing primary drain.
Models
Blower
Motor Speed
External Static Pressure (in. wc.)
0.10 0.20 0.30 0.40 0.50 0.60 0.70
AHR48D3XH21
High
1890 1830 1755 1650 1565 1450 1285
Medium
1515 1480 1450 1380 1295 1115 985
Low
1170 1165 1140 1100 965 860 745
AHR60D3XH21
High
1911 1841 1757 1668 1564 1439 1233
Medium
1556 1507 1450 1388 1266 1246 989
Low
1211 1181 1151 1062 992 911 827
230 Volt
AHR18B3XH21
High
1145 1100 1055 1005 930 845 725
Medium
755 750 725 665 605 485 435
Low
680 655 625 585 540 395 300
AHR24B3XH21
High
1305 1285 1225 1175 920 915 835
Medium
930 920 890 845 705 760 505
Low
735 730 700 670 545 470 NA
AHR30B3XH21
High
1450 1380 1300 1215 1130 1030 910
Medium
1330 1280 1205 1135 1050 975 780
Low
1160 1120 1065 1005 930 825 635
AHR36B3XH21
High
1470 1390 1325 1245 1155 1045 880
Medium
1325 1265 1205 1125 1025 965 840
Low
1115 1075 1025 950 NA NA NA
AHR42C3XH21
High
1750 1670 1570 1477 1260 1125 935
Medium
1590 1520 1435 1277 1150 1010 870
Low
1330 1280 1200 1083 980 850 NA
AHR48D3XH21
High
2005 1940 1850 1755 1650 1530 1405
Medium
1705 1665 1605 1510 1425 1340 1185
Low
1355 1330 1300 1245 1170 990 980
AHR60D3XH21
High
2034 1955 1858 1753 1640 1522 1296
Medium
1733 1672 1609 1527 1431 1272 1220
Low
1388 1359 1313 1255 1133 1004 912
1. Air handler units have been tested to UL 1995 / CSA 22.2 standards up to 0.30" wc. external static pressure.
Dry coil conditions only, tested without filters.
For optimal performance, external static pressures of 0.2" to 0.5" are recommended. Applications above 0.6" are not recommended.
Airflow data shown is from testing performed at 230V. AHE units use a X13 motor, and there is minimal variation of airflow at other distribution voltage values. The
above data can be used for airflow at other distribution voltages.
TABLE 10:
AIR FLOW DATA (CFM)
1
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