York DF 072, Technical Manual

Page: 11 / 24

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