- Imperial; - Metric; Additional Static Resistance (Metric); Electric Heat Minimum Supply Air - York PREDATOR DM120 Technical Manual

TABLE 34: ADDITIONAL STATIC RESISTANCE (METRIC)
3
M S Cooling Only
0.89 14.9
0.99 17.4
1.08 19.9
1.18 22.4
1.27 27.3
1.36 29.8
1.46 34.8
1.55 39.7
1.65 44.7
1.74 49.7
1.83 57.1
1.93 62.1
1.02 69.5
2.12 74.5
2.21 82.0
2.30 89.4
2.40 96.9
2.49 104.3
2.59 111.8
2.68 119.2
2.77 129.1
2.87 139.1
2.96 149.0
1. Add these resistance values to the available static resistance in the respective Blower Performance Tables.
2. Deduct these resistance values from the available external static pressure shown in the respective Blower Performance Table.
3. The pressure drop 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 62.1 Pa, the unit will deliver less M3S during full economizer operation.
TABLE 35: ELECTRIC HEAT MINIMUM SUPPLY AIR

- IMPERIAL

UNIT MODEL SIZE, NOMINAL TONS
HEATER
7.5
kW VOLTAGE
2250
9
2250
18
380/415 2250
24
2250
36
N/A
54
30
1
Economizer
10 12.5
MINIMUM SUPPLY AIR CFM
N/A N/A
3000 3750
3000 3750
3000 3750
3000 3750
2 3
9
5.0 12.4
5.0 14.9
5.0 17.4
5.0 19.9
7.5 22.4
7.5 24.8
7.5 29.8
7.5 32.3
9.9 37.3
9.9 42.2
9.9 47.2
9.9 52.2
12.4 57.1
12.4 62.1
12.4 69.5
12.4 74.5
14.9 82.0
14.9 86.9
14.9 94.4
14.9 101.8
17.4 109.3
17.4 116.7
17.4 124.2
TABLE 36: ELECTRIC HEAT MINIMUM SUPPLY AIR

- METRIC

HEATER
VOLTAGE
kW
9
18
380/415
24
36
54
036-21044-003-A-0304
2
Electric Heat kW
18 24 36
14.9 17.4 19.9
17.4 19.9 22.4
19.9 22.4 24.8
22.4 24.8 27.3
24.8 29.8 32.3
27.3 32.3 34.8
32.3 37.3 39.7
34.8 42.2 44.7
39.7 47.2 49.7
44.7 52.2 49.7
49.7 57.1 59.6
54.6 62.1 64.6
59.6 69.5 72.0
64.6 74.5 77.0
72.0 82.0 84.4
77.0 86.9 91.9
84.4 94.4 99.3
91.9 101.8 106.8
99.3 109.3 114.2
106.8 116.7 121.7
114.2 124.2 131.6
121.7 131.6 139.1
131.6 139.1 146.5
UNIT MODEL SIZE, NOMINAL TONS
7.5
10
MINIMUM SUPPLY AIR M
1.06 N/A
1.06 1.42
1.06 1.42
1.06 1.42
N/A 1.42
Unitary Products
54
24.8
27.3
32.3
34.8
39.7
44.7
49.7
54.6
59.6
64.6
69.5
77.0
84.4
91.9
99.3
106.8
114.2
121.7
131.6
139.1
146.5
154.0
161.4
12.5
3
S
N/A
1.76
1.76
1.76
1.76