11
Air Handler Selection
1.
Air handler selections vary with each application. Use the index below to find Heatcraft Products air handler
performance tables for:
• Standard comfort cooling (either direct expansion or chilled water)
• Heating (either steam or hot water, either make up air or return air)
• Supermarket air conditioning (direct expansion refrigerant)
• Heat reclaim (coil performance, refrigerant condenser, typically supermarket)
2. The air handler performance tables give ARI ratings for the specific applications, conditions and coils
listed. All performance tables (except reclaim) rate: 10 FPI coils at 500 FPM coil air velocity.
To select air handlers for other applications, conditions, or components:
• Call your representative. With your representative, you can have specific
computer selected coils rated for your job conditions.
• Use tables on pages 21 to 23 for estimates of coil performance at various
conditions.
3. See page 12, step 5 to calculate total static pressure. Consult fan tables, pages 24 to 29 and
select fan motor.
4. Heatcraft builds each air handler to your components specifications.
Please specify the following as needed with your order:
• CFM
• External or total static pressure
• Motor HP, motor type, motor voltage, motor location (left hand or right hand)
• Describe coils or specify with Heatcraft Products model numbers.
Coil description can include:
Rows, FPI, refrigerant, design capacity (BTUH),
Number of circuits, coil location inside air handler (preheat, reheat, etc.)
Location of coil connections (left hand or right hand)
• Filter sections and filter types
• Vibration isolators
5.
Go to page 12 for air handler selection example.
Application & Table
Coil Type
Selection Conditions
Heating and cooling
Refrigerant
Selected conditions for each coil type presented
Table 1 “Quick Reference”, page 13
Water & Steam
in a single table. See Table 1 notes for conditions.
Cooling:
Standard comfort cooling
DX Refrigerant
80°F. DB entering air
35°F., 40°F., and
Tables 2 & 3, page 14
4 & 6 Row Coils
67°F. WB entering air
45°F. evaporating temp
Supermarket air conditioning
DX Refrigerant
75°F. DB entering air
35°F., 40°F., and
Tables 4 & 5, page 15
4 & 6 Row Coils
63°F. WB entering air
45 °F. evaporating temp
Standard comfort cooling
Chilled Water
80°F. DB entering air
42°F. ,44°F., 45°F. entering
Tables 6 to 9, page 16
4 & 6 Rows
67°F. WB entering air
water temperature
Heating:
Refrigerant Hot Gas Reclaim
Refrigerant 2, 3,
50°F. Temperature Difference Between Condensing
Table 16 page 20
4, 6, 8 Row Coils
Temperature and Coil Entering Air Temp.
Preheating, Tempering
Hot Water
0 °F. entering air
180°F. entering water and
Tables 10 & 11, page 18
1 & 2 Rows
200°F. entering water
Preheating, Tempering
Steam
0°F. entering air
5 PSIG steam*
Table 11, page 18
1 Row Only
Heating Return Air
Hot Water
60°F. entering air
180°F. entering water
Tables 12 & 13, page 19
1 & 2 Rows
200°F. entering water
Heating Return Air
Steam
60°F. entering air
5 PSIG steam*
Table 13, page 19
1 & 2 Rows
* Steam coils for model sizes 65 and 75 have a 1" tube diameter.
Index To Air Handler Performance Tables - Typical Applications & Coil Selections
