MANUAL OUTDOOR AIR DAMPER
FILTER RACKS AND FILTERS
ACCESSORY | PART NUMBER | ``A'' | |
FILTER | CPFILTRK001A00 | 2111¤16 | |
CPFILTRK002A00 | 3111¤16 | ||
RACK | |||
CPFILTRK003A00 | 2511¤16 | ||
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Selection procedure (with example)
IDetermine cooling and heating requirements at design conditions:
Given:
Required Cooling Capacity (TC) . . . . . . 34,000 Btuh Sensible Heat Capacity (SHC) . . . . . . . 24,000 Btuh Required Heating Capacity . . . . . . . . . . 60,000 Btuh Condenser
II Select unit based on required cooling capacity.
Enter Cooling Capacities table at condenser entering temperature of 95 F. Unit 48SS036 at 1200 cfm and 67 F ewb (entering wet bulb) will provide a total ca- pacity of 36,000 Btuh and an SHC of 26,200 Btuh. Calculate SHC correction, if required, using Note 4 under Cooling Capacities tables.
IIISelect heating capacity of unit to provide design condition requirement.
In the Heating Capacities and Ef®ciencies table on page 5, note that unit 48SS036080 will provide 64,800 Btuh with an input of 80,000 Btuh.
IV Determine fan speed and power requirements at design conditions.
Before entering the air delivery tables, calculate the total static pressure required. From the given, the Wet Coil Pressure Drop table, and the Filter Pressure Drop table on page 18, ®nd at 1200 cfm:
External static pressure | 0.20 in. wg | |
Wet coil | 0.088 in. wg | |
Filter | 0.13 in. wg | |
Total static pressure | 0.42 in. wg (rounded) |
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Enter the table for Dry Coil Air Delivery Ð Horizontal Discharge for 230 and 460 V on page 16. For 208 v operation, deduct 10% from value given. The fan will deliver 1233 cfm at 0.4 external static pressure (1370 x 0.9) at high speed and 852 cfm at 0.5 external static pressure (946 x 0.9) at low speed. The fan speed should be set at high to satisfy job requirements.
VSelect unit that corresponds to power source available.
The Electrical Data table on page 24 shows that the unit is designed to operate at
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