Maintenance; Air System Adjustment - York AE SERIES Installation Manual

5169032-UIM-C-0416
TABLE 11: Air Flow Data (CFM)
Models
48C
48D
60C
60D
1. Air handler units have been tested to UL 1995 / CSA 22.2 standards up to 0.50" 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 0.5" are not recommended.
Airflow data shown is from testing performed at 230V. AE units use a standard ECM constant torque 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.
SECTION XIII: 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 cleaned with water.
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
secondary 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.
SECTION XIV: AIR SYSTEM ADJUSTMENT
To check the Cubic Feet per Minute (CFM), measure the external duct
static using a manometer and static pressure tips. To prepare coil for
static pressure measurements run the fan only to assure a dry coil.
18
1
Blower
Motor Speed
0.10
#5 HI 1759
#4 MED-HI 1684
#3 MED 1511
#2 MED-LO 1305
#1 LO 1123
#5 HI 1774
#4 MED-HI 1709
#3 MED 1484
#2 MED-LO 1295
#1 LO 1102
#5 HI 1964
#4 MED-HI 1889
#3 MED 1693
#2 MED-LO 1486
#1 LO 1292
#5 HI 1907
#4 MED-HI 1851
#3 MED 1648
#2 MED-LO 1456
#1 LO 1261
External Static Pressure (in. wc.)
0.20 0.30 0.40
1719 1685 1644
1639 1606 1569
1460 1427 1388
1260 1212 1178
1068 1029 985
1726 1684 1651
1668 1619 1580
1436 1410 1372
1254 1218 1167
1051 1011 962
1930 1897 1858
1855 1818 1791
1652 1627 1584
1450 1411 1375
1247 1207 1172
1871 1835 1796
1816 1774 1742
1608 1569 1530
1416 1371 1333
1221 1172 1120
Refer to Table 11 for coil Air Flow Data of Cubic Feet Per Minute
(CFM).
Drill 2 holes, one 12" away from the air handler in the supply air duct
and on 12" away from the air handler in the return air duct (before any
elbows in the duct work). Insert the pressure tips, and energize the
blower motor. See Table 9 to determine the air flow, and make the
necessary adjustments to keep the CFM within the airflow limitations of
the coil.
EXTERNAL DUCT STATIC
Measure the supply air static pressure. Record this positive number.
Measure the return air static pressure. Record this negative number.
Treat the negative number as a positive, and add the two numbers to-
gether to determine the total external system static pressure. If a filter
rack is installed on the return air end of the air handler or indoor coil sec-
tion, make sure to measure the return air duct static between the filter
and the indoor coil.
0.50 0.60
1611 1578
1536 1489
1347 1308
1121 1076
909 793
1614 1574
1548 1499
1321 1284
1114 1069
890 831
1823 1789
1747 1716
1551 1510
1335 1291
1123 1055
1762 1723
1699 1659
1492 1445
1289 1227
1055 998
NOTICE
Johnson Controls Unitary Products
0.70
1540
1452
1262
1027
769
1529
1459
1237
1005
766
1752
1668
1462
1252
990
1681
1616
1404
1163
949