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Due to our policy of continuous product innovation, some specications may change without notication.
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PRODUCT DATA | 47
Product Data
Table 21: Down Flow - Air Filter Static Pressure Drop Factors.
If the air filter has been installed, the ESP value has to be set.
For every increase in static pressure by 0.01 in. wc, the ESP value must be increased by
1.
Capacity (kBtu/h [tons]) Flow Rate (CFM) Static Pressure Drop (in wg)
18 (1.5) High (640) -0.04
Middle(580) -0.04
Low (480) -0.04
24 (2.0) High (710) -0.04
Middle(640) -0.04
Low (480) -0.04
36 (3.0) High (1100) -0.06
Middle(1000) -0.06
Low (900) -0.06
42 (3.5) High (1260) -0.07
Middle(1100) -0.06
Low (1000) -0.06
48 (4.0) High (1400) -0.07
Middle(1260) -0.07
Low (1000) -0.06
Down Flow - Air Filter (optional) Static Pressure Drop Factors
Down Flow - Internal Electric Heater Static Pressure Drop Factors
Table 22: Internal Electric Heater Static Pressure Drop Factors.
Heater Capacity (kW) Static Pressure Drop (in. wg)
0 0
3, 5 -0.01
8, 10 -0.01
15 -0.01
20 -0.01
in. wc = inch water column, inAq
If the internal electric heater has been installed, then the ESP value has to be set.
For every increase in static pressure by 0.01 in WC, the ESP value must be increased by
1.
If the ESP setting value is inappropriate, the provided safety device will turn the heater off
according to the airflow.
EXTERNAL STATIC PRESSURE AND AIRFLOW RANGES
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