York G8C05012MUB12 - Filter and Cooling System Integration; Bottom End Return Blower Performance; Recommended Filter Size and Add-on Cooling

036-21120-002 Rev. A (1102)
4 Unitary Products Group
RETURN AIR AND FILTERS
The return air ducts to the furnace must have a total cross
sectional area of not less than two square inches per 1000
BTUH of furnace input rating for heating operation. If air con-
ditioning is to be installed with the furnace, or if it may be
added at a later time, larger return air ducts may be
required, depending on the capacity of the air condi-
tioner and the airflow required.
RECOMMENDED FILTER SIZE/ADD-ON COOLING
TABLE 3: BOTTOM END RETURN -
All airflow is expressed in standard cubic feet per minute. Motor rated at 115 volts. No air filters.
MODEL
SPEED
TAP
EXTERNAL STATIC PRESSURE, INCHES W.C.
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
G8C05012(MU,MD)B12
HIGH 1419 1357 1297 1212 1131 1050 942 846
MEDIUM 1221 1185 1145 1092 1036 961 879 780
LOW 920 902 883 860 818 761 711 639
G8C07512(MU,MD)B12
HIGH 1552 1491 1420 1348 1271 1185 1080 970
MEDIUM 1229 1237 1198 1164 1105 1039 956 861
LOW 889 892 879 866 846 807 760 689
G8C07516(MU,MD)C12
HIGH 1946 1862 1775 1620 1518 1409 1291 1160
MEDIUM 1683 1611 1551 1484 1388 1300 1190 1080
LOW 1110 1138 1175 1190 1175 1126 1041 937
G8C10016(MU,MD)C12
HIGH 1997 1920 1822 1723 1620 1500 1355 1211
MEDIUM 1728 1679 1635 1556 1465 1359 1249 1117
LOW 1131 1156 1181 1190 1171 1126 1049 926
G8C10020(MU,MD)D11
HIGH 2195 2097 2013 1915 1798 1680 1549 1393
MED. HI 1753 1707 1666 1597 1509 1423 1307 1188
MED.LO 1631 1594 1526 1462 1400 1303 1204 1079
LOW 1477 1444 1407 1360 1293 1222 1132 1016
G8C12520(MU,MD)D11
HIGH 2347 2248 2160 2041 1926 1798 1646 1494
MED. HI 1740 1700 1666 1596 1524 1447 1349 1216
MED.LO 1596 1578 1561 1503 1442 1353 1257 1117
LOW 1460 1431 1398 1372 1323 1254 1155 1024
G8C15020UHD11
HIGH 2414 2327 2216 2099 1998 1876 1736 1569
MED. HI 1717 1717 1670 1621 1555 1472 1375 1242
MED.LO 1544 1544 1516 1488 1431 1348 1241 1140
LOW 1431 1393 1397 1354 1314 1235 1144 1035
For applications requiring more than 1800 CFM, it
is required to use the bottom return, both side
returns or one side plus the bottom return.
• Single side return is not approved on 5 Ton mod-
els.
• 18” minimum height for return air box for bottom
return only on Heating only applications with fur-
nace in the upflow configuration.
• 24” minimum height for return air box for bottom
return only on A/C applications with furnace in
the upflow configuration.
Upflow / Horz.
Models
Filter Size Add-on Cooling
Approx. Oper.
Weight
Side
1
1. All filters must be external to the cabinet.
Bottom / End Downflow Tons
CFM @ .5 ESP
2
2. ESP (External Static Pressure) .5” W.C. is at furnace outlet ahead of cooling coil.
Filters must be field supplied.
High velocity type must be used.
Air flows above 1800 CFM require either return from two sides or bottom.
G8C05012(MU,MD)B12 25 x 16 24 x 15 (2) 10 x 20
2, 2-
1/
2
, 3
1200 112
G8C07512(MU,MD)B12 25 x 16 24 x 15 (2) 14 x 20
2, 2-
1/
2
, 3
1200 118
G8C07516(MU,MD)C12 25 x 16 24 x 18 (2) 16 x 20
2-
1/
2
, 3, 3-
1/
2
, 4
1600 129
G8C10016(MU,MD)C12 25 x 16 24 x 18 (2) 16 x 20 2-
1/
2
, 3, 3-
1/
2
, 4 1600 135
G8C10020(MU,MD)D11 (2) 25 x 16 24 x 21 (2) 20 x 20 3, 3-
1/
2
, 4, 5 2000 149
G8C12520(MU,MD)D11 (2) 25 x 16 24 x 21 (2) 20 x 20
3, 3-
1/
2
, 4, 5
2000 155
G8C15020UHD11 (2) 25 x 16 24 x 21 N/A
3, 3-
1/
2
, 4, 5
2000 165