Belt Drive Blower Motor And Drive Data . 10 Supply Air Blower Performance (6 Ton Belt Drive) - Side Duct Application; Static Resistances; Electric Heater Cfm Limitations - York DF 072 Technical Manual

254599-YTG-C-0807
TABLE 8: SUPPLY AIR BLOWER PERFORMANCE (6 TON BELT DRIVE) - SIDE DUCT APPLICATION
Unit Motor
Tonnage Speed
CFM
Hi 2256
Med/Hi 2145
2
6 Med 2020
Med/Low -
Low -
Unit Motor
Tonnage Speed
CFM
Hi 2125
Med/Hi 2014
2
6 Med 1876
Med/Low -
Low -
1. Includes allowances for a wet evaporator coil, 1" filters, and the heat exchangers. Refer to STATIC RESISTANCES
Table for resistance values.
2. Side Duct application (230 Volts)
TABLE 9: STATIC RESISTANCES
DESCRIPTION
1 3
ECONOMIZER
ELECTRIC 7-15KW
1
HEATERS
20-30KW
BOTTOM DUCT CONNECTIONS
2
COOLING ONLY
1. Deduct these resistance values from the available external static pressure shown in SUPPLY AIR BLOWER PERFORMANCE Tables.
2. Add these resistance values to the available static resistance values on SUPPLY AIR BLOWER PERFORMANCE Tables.
3. The pressure through the economizer is greater for 100% outdoor air than for 100% return air. If the resistance of the return air
duct system is less than 0.25 IWG, the unit will deliver less CFM during full economizer operation.
TABLE 10: ELECTRIC HEATER CFM LIMITATIONS
UNIT MODEL SIZE NOMI-
NAL TONS
6
Unitary Products Group
Available External Static Pressure - IWG
0.2 0.3
Watts CFM Watts
883 2258 931
771 2127 784
637 1999 656
- - -
- - -
Available External Static Pressure - IWG
0.7 0.8
Watts CFM Watts
971 2044 940
859 1965 861
730 1832 740
- - -
- - -
1000 1200 1400
0.07 0.08 0.09
0.04 0.05 0.06
0.06 0.07 0.08
1
0.06 0.07 0.08
0.08 0.10 0.12
VOLTAGE
208/230-3-60
460-3-60
575-3-60
0.4 0.5
CFM Watts CFM
2247 950 2223
2119 808 2089
1985 675 1947
- - -
- - -
1
0.9 1.0
CFM Watts CFM
1958 898 1864
1896 843 1801
1793 756 -
- - -
- - -
RESISTANCE, IWG
CFM
1600 1800 2000
0.11 0.13 0.15
0.07 0.08 0.10
0.09 0.11 0.13
0.09 0.10 0.11
0.14 0.16 0.18
MINIMUM SUPPLY AIR CFM
HEATER SIZE NOMINAL KW
5 7 10
1800 1800 1800
- 1800 1800
- - 1800
1
0.6
Watts CFM Watts
964 2182 979
826 2051 844
696 1910 715
- - -
- - -
Watts
854
806
-
-
-
2200 2400 2600
0.17 0.20 0.23
0.12 0.14 0.16
0.15 0.17 0.20
0.12 0.14 0.16
0.20 0.23 0.26
15 20
1800 1800
1800 1800
1800 1800
2800 3000
0.26 0.30
0.19 0.22
0.23 0.26
0.19 0.22
0.29 0.32
30
1800
1800
1800
11