Heatcraft Refrigeration Products HCS manual Standard Unit Features

Page 4

 

Standard Unit Features

 

 

 

Basic Ca

 

 

 

 

 

 

 

 

Basic Cabinet

 

Motor Mount

 

Consists of a fan section and a coil section with double wall drain

 

Heatcraft puts the motor inside the fan section cabinet. It is

 

pan. The housing panels are die formed from mill galvanized steel

 

mounted on a heavy gauge steel slide rail base. There are several

 

and insulated with 1" - 3/4 pound density mat faced fiberglass

 

advantages with internal motor location. It eliminates the need for

 

insulation. All fan sections have hinged and latched access doors.

 

a bulky belt guard. Another advantage is that Heatcraft balances

 

Unit below has fan and coil section.

 

the factory mounted motor and drive components, which can

 

 

 

 

eliminate additional balancing at start-up.

 

Fans

All units have single, double width, double inlet fan

 

wheels for quiet performance and low energy consumption.

Coil Section

Single wheels eliminate the problem of unequal loading which is

Coil sections cover a wide range of heating and cooling

characteristic of units with multiple wheels. Also, the expense of a

“pants” type duct connection is avoided. Sizes 03 through 41 units

requirements. Side, top and bottom panels are 16 gauge mill

have forward curved and size 50 through size 75 units have airfoil

galvanized steel. All coil sections accommodate either small or

fan as standard.

 

 

large face area coils.

 

 

 

The HCS coil section will hold 15 1/2" of coils and spacers. The

 

 

 

HCS section covers most applications. Use the HCL coil section

 

 

 

if the coil or access space is more than 15 1/2". (See page 38 for

 

 

 

maximum per model.)

 

 

 

Cooling coil sections have a drain pan with double wall

 

 

 

construction. Insulation is sandwiched between the outer panel

 

 

 

and the inner drain pan. The pans are heavy gauge mill galvanized

 

 

 

steel. Heatcraft welds the corners of the drain pans and puts drain

 

 

 

connections on both sides of the coil section for field convenience.

Forward

Air Foil

The coils sit in an upright position inside the coil section. The

air flows horizontally through the coils. Larger models (sizes 50

Curved Fans

Fans

through 75) have cooling coils stacked two high.These larger

 

 

 

models come with an intermediate drain pan, so that condensate

Bearings

 

 

from the upper coil does not flow over the lower coil.

Unit sizes 03 through 12 have lifetime lubricated fan bearings as

 

standard. Unit sizes 03 through 12 with optional medium pressure

Coils come in either small or large sizes (pages 42-43). A large

fan have pillow block bearings rigidly supported on a heavy steel

face area coil fills the total face area of the coil section. The

frame. Unit sizes 14 through 75 have pillow block bearing rigidly

coil section’s total air volume passes through the large coil. A

supported on a heavy steel

frame as standard. The bearings are

small coil is shorter in height and does not fill the total face

self aligning and are selected for an average service life in excess

height of the coil section. Air may bypass above the coil through

of 200,000 hours. There are extended lube lines and grease fittings

balance dampers or internal face and bypass dampers. With either

on the drive side of all units that have pillow block bearings. The

combination, it is possible to adjust and control the amount of air

bearings on these models can be lubricated without opening the

passing through the small size coil.

blower section access door. Maximum operating temperature is

 

140°F.

 

 

 

 

 

 

Chilled water and direct expansion coil face velocities

 

 

 

over 550 FPM should be avoided--WATER CARRYOVER.

Fan Shaft

 

 

 

The fan shaft is solid polished steel, and keyed for both fan and

If desired, a blank off plate above the small coil can force total coil

drive. It is designed so that critical speed is at least 1.25 times the

section air volume through the small coil.

maximum operating speed.

 

 

 

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Contents Air Handlers Index Quality StandardNomenclature Cabinet style Fan TypeStandard Unit Features Air Handler Coils Direct Expansion CoilsWater Coils Heat Reclaim CoilsConstruction & Dimensions Accessories- Electric HeatUnit Heater Dimensions Size Maximum KW Electric Heater Selection ExampleComponent 208 240 460 480 Accessories Auxilary Sections- All unit Sizes Dimensions, Page 29 to Filters And Auxiliary SectionsAccessories for Fan and Coil Sections Available Motors, Drives, Motor Starters per HorsepowerMotor Drive Starter Motor Horsepower Description ‘A’ = AvailableAir Handler Selection Selection ConditionsSelection Procedure Selection ExampleAir volume at Air handler DX air Refrigerant Chilled water Air Handler Performance Quick ReferenceSteam Cu m/hAir Handler Performance- Direct Expansion CoilSaturated Suction Temperature Air Handler Perfromance- Direct Expansion1339 1553Row Coils Air Handler Performance- Chilled WaterSize Air Area Air Handler Perfromance- Chilled Water Std FaceAir Handler Performance- Hot Water/Steam Heating 0F. AirHeating 60F. Air Size Air Sq. FtOne Row Two Row Two Row One RowCoil Perfromance- Heat Reclaim MBH/SQ FT Temperature DifferenceType a and Type 5, hot gas reclaim, heating capacities Refrigerant Evaporating Temperature F Coil Performance- Direct Expansion MBH/SQ FTActual capacity will vary With coil circuiting 400 450 500 550 600Coil Perfromance- Chilled Water MBH/SQ FT ChilledRows FPM, Type a Coils 1/2 DIA FPM, Type 5 Coils 5/8 DIACoil Performance- Heating, Water & Steam FPM, Type 5 Coils 5/8 DIA Rows500 600 650 700 400 FPM, Type 8 Coils 1 DIA RowsFan Performance SizeCoil Total Size 14 and Size RPM BHPSize 20 and Size 32 3/8 Airfoil Fan High Efficiency Filter Sections- Dimensions Dimensions inchesSize 65 and Size High Efficiency Filter SectionAccessory Flange Pattern Dimensions SizeMixbox Inlet Duct Connections Sizes 03 Sizes 20Dimensions ReferenceMix box Motor and coil connectionSizes 03 41 FC DischargeSizes 50 75 AF For All Units Sizes 10 1/812 5/8 Rows 15 5/8 MixboxDepth is dimension Dimension ‘T’Sizes 50 65 AF ‘D’ added toFor All Unit Sizes Sizes 03 Mounting Locations For Vibration IsolatorsSize Edge All mounting holes are 5/8 inch diameter Rows Inch filters For All Unit SizesOne and two row heating coils do not have Coil Section Vibration Isolators, Quantity RequiredModels Air Flow Reheat Position Preheat PositionNet Weights and Metal Gauges Weight in poundsTo estimate weights for other coils Air Handler Component Unit SizeFace Areas- Air Pressure Drops, Dry Coils Face Area Air Handler Unit Size Square FeetDepth Flat & hi 35% Efficient , Pleated Air Pressure Drops- Cabinets, Filters, Wet CoilsFin Air Velocity Feet Per minute Physical Data Unit Size CFM Range Cooling19.25 25.50 34.00 40.38 49.50 64.58 74.91 Small 16.04 21.25 27.63 31.88 40.50 51.67 59.42Mechanical Specification