Heatcraft Refrigeration Products HCS User Manual

Bulletin AH-TB

January 2011

(Replaces AH-91C)

Air Handlers

Tech Bulletin

For Air Conditioning, Heating and Ventilation

Available in Bohn™, Climate Control™, Chandler™ & Larkin™

Models HCS, HCL

VCS, HD

Size 03 thru 75

Index

Features, Accessories 3 - 10

Performance, Selection 11 - 23

Fan Data 24 - 29

Dimensional Data 29 - 38

Weight 39

Static, Air Pressure Drop 40 - 41

Physical Data 42-43

Mechanical Specications 44

VCS MODELS 03 - 41

11 Standard Models

Capacities From

1000 to 24000 CFM

Quality Standard

Heatcraft has built high performance air handlers for the building trade for over forty years.

Our hallmark has been a continuing process of design improvements to keep pace with new system requirements. This bulletin presents the complete line of air handling units oered by Heatcraft for air conditioning, heating, and ventilation applications.

Quick Cues for the ve cabinet styles:

S = SHORT in model HCS L = LONG in model HCL V = VERTICAL in model VCS HD = HEATING DUTY in model HD

Our highest design priorities are for units with low operating costs, rugged construction, and the features most needed for simple trouble free installation and maintenance.

Heatcraft Refrigeration Products' ISO 9000 certication guarantees consistent quality products for you and your customers.

Customers can specify brand at time of order, availabe in Bohn, Climate Control, Chandler and Larkin.

Features

Nomenclature

HCL 0 6 F C

Cabinet style Fan Type:

HCS — (S for Short) Insulated fan section with motor FC - Forward curved fans, available

base and access door(s), horizontally adjacent (same with all cabinet styles, sizes 3 thru 41 elevation) with insulated short depth coil section with drain pan. AF - Air foil type fans, available with sizes 20 thru 75, all cabinets except HCL — (L for Long) Insulated fan section with motor VCS style base and access door(s), horizontally adjacent (same elevation) with insulated long coil section with drain pan. Nominal coil face area (square feet): Size 03 thru size 75 VCS — (V for Vertical, fan on top of coil section) See inside back cover for actual coil face Insulated fan section with motor base and access area for each model size. door(s), vertically adjacent to (on top of ) insulated AHV coil section with drain pan.

HD — (HD for Heating Duty) Uninsulated fan section with motor base and access door(s), horizontally adjacent (same elevation) with 1, 2, 3, 4 or 6 row heating section.

Standard Features, Basic Cabinet Models Per Unit Size

‘S’ = Standard ‘A’ = Available

Standard Feature Description Unit Size 03 06 08 10 12 14 18 20 26 34 41 50 65 75

HCS (short coil section) cabinet style S S S S S S S S S S S S S A

HCL (long coil section) cabinet style S S S S S S S S S S S S S S

VCS (fan above coil section) cabinet style S S S S S S S S S S S A A A

HD (heating duty) cabinet style S S S S A A A A A A A A A A

Universal (can be oor or ceiling) mount S S S S S S S S S S S

Floor or platform mounting only S S S

16 gauge casing - fan and coil section S S S S S S S S S S S S S S

Hinged access door motor side of fan section

removable panel on opposite side S S S S S S S

Hinged access doors, both sides of fan section A A A A A A A S S S S S S S

Blower - forward curved (FC), low pressure S S S S S S S

Blower - forward curved (FC), medium pressure A A A A A A A S S S S

Blower - air foil (AF), Not available as VCS unit A A A A S S S

200,000 hour lifetime lubricated bearings S S S S S

Pillow block bearings, extended lube lines A A A A A S S S S S S S S S

Adjustable motor base S S S S S S S S S S S S S S

Left or right hand motor positions S S S S S S S S S S S S S S

Combined fan & coil sections (HCS & HCL only) S S S S S S S

Split fan & coil sections (HCS, HCL, & HD only) A A A A A A A S S S S S S S

Coil section drain pan (HCS & HCL models only) S S S S S S S S S S S S S S

Coil section drain pan (VCS models only) S S S S S S S S S S S S S S

1" by 3/4 lbs Insulation, berglass (HCS, HCL, & VCS) S S S S S S S S S S S S S S

Horizontal or vertical fan discharge arrangements,

see drawings pp.31-35 for S S S S S S S S S S S S S S

actual placement and bottom discharge

Standard Unit Features

Basic Ca Basic Cabinet

Consists of a fan section and a coil section with double wall drain pan. The housing panels are die formed from mill galvanized steel and insulated with 1" - 3/4 pound density mat faced ﬁberglass insulation. All fan sections have hinged and latched access doors. Unit below has fan and coil section.

Fans

All units have single, double width, double inlet fan wheels for quiet performance and low energy consumption. Single wheels eliminate the problem of unequal loading which is characteristic of units with multiple wheels. Also, the expense of a “pants” type duct connection is avoided. Sizes 03 through 41 units have forward curved and size 50 through size 75 units have airfoil fan as standard.

Motor Mount

Heatcraft puts the motor inside the fan section cabinet. It is mounted on a heavy gauge steel slide rail base. There are several advantages with internal motor location. It eliminates the need for a bulky belt guard. Another advantage is that Heatcraft balances the factory mounted motor and drive components, which can eliminate additional balancing at start-up.

Coil Section

Coil sections cover a wide range of heating and cooling requirements. Side, top and bottom panels are 16 gauge mill galvanized steel. All coil sections accommodate either small or 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.)

Forward

Curved Fans

Air Foil

Fans

Bearings

Unit sizes 03 through 12 have lifetime lubricated fan bearings as standard. Unit sizes 03 through 12 with optional medium pressure fan have pillow block bearings rigidly supported on a heavy steel frame. Unit sizes 14 through 75 have pillow block bearing rigidly supported on a heavy steel frame as standard. The bearings are self aligning and are selected for an average service life in excess of 200,000 hours. There are extended lube lines and grease ﬁttings on the drive side of all units that have pillow block bearings. The bearings on these models can be lubricated without opening the blower section access door. Maximum operating temperature is 140°F.

Fan Shaft

The fan shaft is solid polished steel, and keyed for both fan and drive. It is designed so that critical speed is at least 1.25 times the maximum operating speed.

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. The coils sit in an upright position inside the coil section. The air ﬂows horizontally through the coils. Larger models (sizes 50 through 75) have cooling coils stacked two high.These larger models come with an intermediate drain pan, so that condensate from the upper coil does not ﬂow over the lower coil.

Coils come in either small or large sizes (pages 42-43). A large face area coil ﬁlls the total face area of the coil section. The coil section’s total air volume passes through the large coil. A small coil is shorter in height and does not ﬁll the total face height of the coil section. Air may bypass above the coil through balance dampers or internal face and bypass dampers. With either combination, it is possible to adjust and control the amount of air passing through the small size coil.

Chilled water and direct expansion coil face velocities over 550 FPM should be avoided--WATER CARRYOVER.

If desired, a blank off plate above the small coil can force total coil section air volume through the small coil.

Air Handler Coils

There are a wide variety of coil types to meet the load requirements of conditioned spaces. Heatcraft’s four coil types are: water, direct expansion, heat reclaim and steam coils. All standard coils have copper tubes and aluminum ﬁns and a heavy gauge mill galvanized steel casing. Staggered tube designs increase air turbulence and improve coil performance. The plate type, die formed, corrugated ﬁn design provides optimum strength. The ﬁn design also enhances air turbulence for peak performance. Each ﬁn has die formed, self-spacing ﬁn collars which completely surround the tubes. Heatcraft mechanically expands the tubes into the ﬁns to provide maximum heat transfer. Fin spacing selections of six to fourteen ﬁns per inch insure that an optimum coil is offered to meet speciﬁc design needs.

Water Coils

A wide range of choices leads to the best coil selection for each particular job. Select water cooling coils from 4, 5, 6, or 8 row coil depth options. Select water heating coils from 1, 2, or 3 row coil depth options. All water coils offer ﬁve ﬁn densities (6, 8, 10,

Water Coils

Direct Expansion Coils

Select direct expansion coils from 3, 4, 5, 6, or 8 row coil depth options. All direct expansion coils offer ﬁve ﬁn densities (6, 8, 10, 12, or 14 FPI). Specify either 1/2" (Type A) or 5/8" (Type 5) tube diameters. Each coil has a brass, sweat connection type distributor and copper suction header. Distributor leads of equal length work for equal refrigerant distribution to all the circuits. Working with Heatcraft software or your representative, select from a among variety of circuit designs. Heatcraft has an optimum design to deliver the proper refrigerant pressure drop for your conditions. Specify multiple distributors for face split or row split control of the coil.

12, or 14 FPI). Specify either 1/2" (Type A) or 5/8" (Type 5) tube diameters. Heatcraft optimizes circuit design from the header into the coil and delivers high internal heat transfer coefﬁcients for each application’s conditions. This is done without resorting to internal devices which increase pressure drop or restrict draining. All circuit designs avoid trapped circuits, so the coil is drainable. There are vent and drain connections on both supply and return headers on coils of 3 or more rows. All coil connections terminate outside the air handler coil section cabinet. Design working pressure is 250 PSIG. Design ﬂuid temperature for heating coils is 300°F.

Direct

Expansion

Coils

Condenser Heat Reclaim Coils

Steam Coils

Nonfreeze Steam (NFS) coils have internal steam distributing tubes which are directionally lanced for high performance and good condensate removal. The coils are also pitched in the coil casing. The design working pressure and temperature of standard copper tube coils are 150 PSIG and 366ºF. respectively. Depending upon job requirements, select the 5/8" (Type 5) tube diameter coil at an optimum ﬁn spacing and a one or two row coil depth for air handler model sizes 03 through 50. For models 65 and 75, select the 1" (Type 8) tube diameter coil with one row at an optimum ﬁn spacing.

Heat Reclaim Coils

Refrigerant Heat Reclaim (RHR) coils with multiple circuits handle applications where a number of refrigeration compressors are connected to a single coil. Each circuit has heavy wall copper, sweat type, hot gas inlet and liquid or cooled gas outlet connections. Heatcraft's custom coil circuiting maintains an internal coil pressure drop below 5 PSIG for each system. Depending upon job requirements select 1/2" (Type A) or 5/8" (Type 5) tube coils, select one of ﬁve ﬁn densities (6, 8, 10, 12, and 14 FPI), and select from coil row depths of 2, 3, 4, 5, 6, an 8 rows.

Steam

Coils

Accessories- Electric Heat

Electric heaters are UL listed for duct installation. The UL

label applies to the heater only, not the complete air handler.

Heaters are furnished as a separate section and are available with insulated or uninsulated casings. Controls such as contactors, fuses, etc., may be factory installed and wired in the heater section end panel provided the number of control steps is not excessive.

Remote control panels are also available.

Construction & Dimensions

Unit Heater Dimensions (In.)

Size H W

03 22 3/4 30 5/8 06 26 45 5/8 08 35 1/2 42 5/8 10 35 1/2 51 5/8 12 38 3/4 57 5/8 14 38 3/4 66 5/8 18 47 3/4 66 5/8 20 44 83 5/8 26 44 108 5/8 34 54 108 5/8 41 65 108 5/8 50 74 3/4 110 7/8 65 82 3/4 126 7/8 75 94 3/4 126 7/8

Notes: Heaters for constant volume units to have 35 W/in2 of wire surface maximum.

1. Total KW Needed

Approximate KW =

CFM x TD (F)

3000

2. Number Of Steps Recommended

Rule of thumb for calculating the recommended number of steps required. Use Step A or B below, whichever is higher.

A. Number of Steps =

300 x Total Heater KW

CFM

(Based on approx. 10°F. temp. rise per step)

B. Number of Steps =

Total Heater KW

Maximum KW per step

Accessories- Electric Heat

The standard electric heater section construction Typical options for the electric heater includes: section are:

1. Automatic thermal cutout

2. Heat limiters

3. Air ﬂow switch

1. Fiberglass insulation in cabinet

2. At least one magnetic contactor per step of heating (two or three pole break)

3. Three phase fuse blocks and fuses

4. Transformer with primary fusing

5. Manual reset thermal cutout in control circuit

Maximum KW Component 208 V 240 V 460 V 480 V

Low amps contactor 9.0 10.4 19.9 20.8 High amps contactor 17.3 19.3 38.2 39.9 Fuse block 17.3 19.9 38.2 39.9

Maximum KW per

contactor and per fuse

block (at least one

contactor is required per

step of heating):

Electric Heater Selection Example

A. How many KW is needed to increase temperature of 17000 CFM by 27 °F for Air Handler Model Size 34?

17000 X 27 is: 153 KW IS REQUIRED 3000

B. How many steps required at 10°F rise per step?

300 X 153 is: 2.7 STEPS ROUNDS UP TO 3 STEPS 17000 C. How many steps required at 460 volts with low amps contactors?

153 is: 7.7 STEPS ROUNDS UP TO 8 STEPS

19.9

D. How many steps required at 460 volts with high amps contactors?

153 is: 4.0 STEPS

38.2 E. How many fuse blocks required?

153 is: 4.0 FUSE BLOCKS

38.2

°F. Order the 153 KW to get the 27 degree rise. Throw out the 3 steps (ﬁgured at 10°F. rise in part B), because it is smaller than the two values ﬁgured per contactor size (parts D & E). Decide whether you want high amps or low amps contactors, if you want low amps contactors, round the 7.7 to 8 and order 8 of the low amps contactors (you now have a possible 8 steps of control). If four steps of control are satisfactory, order the high amps contactors. In either case, the application requires four fuse blocks (part E).

Notes:

1. You must order the split shipment of the fan and coil sections to get electric heat on unit size 03 through unit size 18.

2. All electric heat controls are built into the heater control box.

3. Specify two pole break contactors or three pole break contactors. Two pole contactors only de-energize, while three pole contactors disconnect.

4. Be aware of requirements for heater circuits rated more than 48 amps. According to N.E.C. Code and U.L. you must subdivide the heater elements of such circuits. N.E.C. Code requires that the sub-circuit fuses be furnished by the heater manufacturer.

Commonly Used Control Systems: A. For small loads (up to 20 KW),consider a multi-stage thermostat. B. For medium loads (up to 200 KW), consider a modulating thermostat that operates a step controller. C. For ﬁne control of large loads (above 75 KW), consider a combination step control and SCR vernier system. This scheme has 80% of heater capacity controlled by conventional step controller, with the other 20% on a solid state SCR controller. D. For 100% proportional control of any size, consider a total SCR control. E. Heatcraft does not supply : multi-stage thermostats modulating thermostats But you will want to order contactors and fuse blocks from Heatcraft that are appropriate for for the control scheme speciﬁed in the ﬁeld.

Flat Filter Sections

Flat ﬁlter sections are space saving and economical. Choose either two inch or four inch ﬁlters. The two inch ﬁlters can be the throwaway, the 35% pleated, or the high velocity cleanable type. Four inch ﬁlters are 35% pleated, they have more ﬁlter surface than two inch ﬁlters. Four inch ﬁlters impose less static on air ﬂow and do not need to changed as often as two inch ﬁlters. The ﬁlters slide into metal channels and are removable from either side of the section.

Flat Filter Section

High Capacity Filter Sections

Designed for high air volume applications. Filters are arranged in a V or W pattern for the greatest surface possible which provides extended ﬁlter life and reduced resistance to air ﬂow. This means less fan horsepower. The sections have access doors on each side to ease ﬁlter change.

Mix Box Sections

The Mixbox is an entering air section. Typically, themixbox accepts air from two sources. Many system designers economize performance by varying the two air ﬂows to deliver conditioned air with minimum energy consumption. Mixbox sections are constructed with heavy gauge mill galvanized steel. Select from three inlet opening locations: the air can enter through openings at the top, at the back, or at the bottom of the section. Order the mixbox with or without dampers. The section with dampers has parallel blades at each opening and an interconnecting linkage between the openings. The damper rods rotate in frictionless sleeve bearings, and the drive rod extends from both sides of the section for either left or right hand drive.

Mixbox

High capacity Filter Section

High Efﬁciency Filter Sections

Select 22", 28", or 44" bag ﬁlter sections. Choose medium or high efﬁciency bag or cartridge ﬁlters for this section. See pages 9, 29, 42, and 43. Sections are complete with preﬁlter and bag ﬁlter tracks. The sections have an extruded aluminum ﬁnal ﬁlter track with a reinforced nylon pile seal. The postive seal forces the air ﬂow through the high efﬁciency ﬁnal ﬁlter.

Extruded Aluminum

Filter Track

Final Filter Tracks Have

Reinforced Nylon Pile

For A Postive Seal

Face And Bypass Dampers

For damper applications, choose either the internal face and bypass section or the external face and bypass section. If used with a large coil the damper section must be the external face and bypass damper type. When used with a small coil, select the internal face and bypass damper section. The damper sections have balanced opposed blades with interconnecting linkage. The blades positively lock to the damper shafts. The shafts rotate freely in frictionless sleeve bearings.

Face and Bypass Dampers

Accessories

Filters And Auxiliary Sections

(see pages 42 and 43 for number and quantity of ﬁlters per model)

Flat and High Capacity Filter Sections- All Unit Sizes: (Dimensions, Page 29 to 37)

2" ﬂat ﬁlter section with choice of three standard ﬁlter types:

• 2" throwaway ﬁlters

• 2" 35% efﬁcient pleated ﬁlters

• 2" permanent high velocity cleanable ﬁlters

4" ﬂat ﬁlter section:

• with 4" 35% efﬁcient pleated ﬁlters

High capacity ﬁlter section with choice of three standard ﬁlter types:

• 2" throwaway ﬁlters

• 2" 35% efﬁcient pleated ﬁlters

• 2" permanent high velocity cleanable ﬁlters

High Effeciency Filter Sections- All Unit Sizes: (Dimensions, Page 29 to 37)

Preﬁlters: select either 2" throw-away or 2" 35% efﬁcient ﬁlters as preﬁlters. All three high

efﬁciency ﬁlter sections accept preﬁlters, without reducing ﬁnal ﬁlter depth capacity.

• 2" high efﬁciency ﬁlter section (accommodates up to 12" of ﬁnal ﬁlter depth):

• Preﬁlter and either 6"or 12" cartridge ﬁlters at 60% to 65%, or 80% to 85%, or 90% to 95% efﬁciency

• 28" high efﬁciency ﬁlter section (accommodates up to 21" of ﬁnal ﬁlter depth):

• Preﬁlter and 21" bag ﬁlters at 60-65%, or 80-85%, or 90-95% efﬁciency

• 44", high efﬁciency ﬁlter section (accommodates up to 37" of ﬁnal ﬁlter depth):

• Preﬁlter and 30" bag ﬁlters at 60% to 65%, or 80% to 85%, or 90% to 95% efﬁciency

• OR preﬁlter and thirty-seven inch bag ﬁlters at 60% to 65%, or 80% to 85%, or 90% to 95% efﬁciency

High efﬁciency ﬁlter section options:

• 1" depth by 3/4 lbs per cu. ft. density ﬁber glass insulation (standard section not insulated)

• Diffuser section, must be used when high efﬁciency ﬁlter section is downstream of fan (blow-through unit)

• Double wall construction on high efﬁciency ﬁlter section, adds 4" to the width and 2" to the height of the unit. Insulation is 2" depth and 1.5 lbs per cu. ft. ﬁberglass. The insulation is sandwiched between standard unit and outer skin.

Auxilary Sections- All unit Sizes: (Dimensions, Page 29 to 37)

• Mixbox section, without dampers, with top, bottom, or back inlet openings,

• HCS type coil module, includes insulation, drain pan and four mounting legs, 15.5" max coil depth, see page 38.

• HCL type coil module, includes insulation, drain pan and four mounting legs, and more coil depth, see page 38.

• internal face and bypass sections, must be used with small coil for air bypass. See page 8.

• external face and bypass section, must be used with HCL type coil section or module. See page 8.

• Insulated access section, same size as high capacity ﬁlter section, hinged and latched doors, both sides.

• Uninsulated access section, same size as high capacity ﬁlter section, hinged and latched doors, both sides.

Accessories for Fan and Coil Sections

Fan Section Accessory:

Forward curved blower for total static of 3.5" to 6" ........................................................................Models 03 - 18 for all cabinet styles

Internal spring isolation (discharge arrangement 2 and 3 only).......................................................All models except size 14 and VCS cabinets

Internal spring isolation (discharge arrangement 2, 3, 4, 5 only) ....................................................All VCS cabinets except size 14

Inlet vanes (does not include damper motor), forward curve (FC) ..................................................Models 20 - 41 for all cabinet styles

Inlet vanes (does not include damper motor), air foil (AF) fan .......................................................Models 20 - 75 for all cabinet styles

Dual drive (extended shaft blowers with motors and drives

installed on each side of fan, select 2 motors and 2 drives .........................................................Models 20 - 75 for all cabinet styles

Coil Section Accessory: Available on:

Large face area and small face area coils (see pages 42 & 43) ........................................................All HCS, HCL, HD, and VCS coil cabinets

Balancing dampers above small coil (to adjust air ﬂow over coil in the ﬁeld) ................................All HCS, HCL, HD, and VCS cabinets

Blank off plate above small sized coil (to force entire air ﬂow over coil) .......................................All HCS, HCL, HD, and VCS cabinets

Stainless steel drain pan (in coil sections)....................................................................................... All HCS, HCL, HD, and VCS coil cabinets

Coil section access door (standard section has removable panels) ..................................................All HCL and VCS coil cabinets

Coil spacer, a preheat coil can be spaced apart from a cooling coil with a coil spacer, the spacer prevents air bypass around the downstream

coil. The standard spacer is 6" wide and is furnished with a 4" x 6" .......................................All HCL and VCS coil cabinets

removable inspection plate. See below for reheat coil.

Mount reheat coil to leaving air side of section (see page 38).................. .......................................All HCL and VCS coil cabinets

Gaskets

Gaskets between sections......................................................................................... ........................All HCS, HCL, HD, and VCS cabinets

Gaskets between sections and gasketed panels (outdoor application)..........................Available on all ﬁve cabinets

Double Wall: Double wall construction, adds 4" to the width and 2" to the height and length of cabinet. Insulation is 2" of ﬁberglass at 1.5 lbs per cubic foot density. Available on all ﬁve The insulation is sandwiched between the standard unit and the outer skin. fan and coil cabinets

Available on:

Available Motors, Drives, Motor Starters per Horsepower

Motors are three phase, ball bearing, rigid base and belt duty.

‘A’ = Available

Motor Drive* Starter Motor Horsepower

Description 1 1.5 2 3 5 7.5 10 15 20 25 30 40 50

Open single speed motor, EPAct A A A A A A A A A A A A A Totally enclosed fan cooled (TEFC) motor, EPAct A A A A A A A A A A A A A Open 2 speed 2 winding, 1800-1200 RPM motor A A A A A A A A A A Open single speed premium high efﬁciency motor A A A A A A A A A A A A A

Fixed drive - at a 120% Safety Factor of HP A A A A A A A A A A A A A Fixed drive - selected at a 150% SF of HP A A A A A A A A A A A A A Adjustable drive - selected at a 120% SF of HP A A A A A A A A A A Adjustable drive - selected at a 150% SF of HP A A A A A A A A A A

Motor starter at 460/3/60, 120 volt holding coil A A A A A A A A A A A A A Motor starter at 230/3/60, 120 volt holding coil A A A A A A A A A A A Motor starter at 200-208/3/60, 120 volt holding coil A A A A A A A A A A

* The percentage means the belts can handle an extra 20% or 50% BHP.

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.

Index To Air Handler Performance Tables - Typical Applications & Coil Selections

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.

Selection Example

Air Handler Selection Conditions:

“I want a ceiling mounted air handler that gives 35 tons of cooling and 35 tons of heating. I have 44°F. water for cooling and I have 200°F. water for heating. My entering air temperatures on the coil are standard, that is 80°F. dry bulb and 67°F. wet bulb (50% relative humidity) for cooling. For heating, the entering air temperature is 60°F. I will supply duct work, you should select the motor to handle a half inch of external static pressure. Select the smallest air handler possible and tell me what kind of CFM, ﬂow rates, ﬂuid pressure drops, and sensible cooling performance your selection will give me. I want a ﬁlter too.”

Selection Procedure:

1. Which air handler for cooling performance? Look at index of air handler performance on page 11. Find that tables 6 through 9 give chilled water performance. You need 35 tons or 35 x 12 = 420 MBH Compare 1/2" and 5/8" and 4 row and 6 row performance: Select size 20 air handler with six row 1/2" tube coil with capacity of: 430 MBH Note that 4 row 5/8" tube coil is not enough at: 374 MBH

2. Which air handler for heating performance? Look at index of air handler performance on page 11. Find that tables 12 & 13 are for hot water performance with 60°F. air. You need 35 tons or 35 x 12 = 420 MBH Compare 1/2" and 5/8" and 1 row and 2 row performance: Select one row 5/8" tube coil for size 20 air handler with capacity of: 502 MBH Note that 1 row 1/2" tube coil is much too small at capacity of 395 MBH

3. Comparing steps 1 & 2, select: Size 20 air handler at 10025 CFM with 6 row, 1/2" tube chilled water coil with 1 row, 5/8" tube hot water coil.

4. Look at page 38, “Characteristics of standard coil sections “ and conﬁrm that: 1 row depth coil casing: 3.25 inches + 6 row depth coil casing: +9.75 inches Total 13.00 inches ﬁts into HCS type cabinet

5. Look at page 40 & 41, “Air pressure drop tables” and calculate total pressure drop:

0.17 inch Pressure drop through 1 row coil, see dry 5/8" tube at: 10025 Divided By 19.25 = 521 FPM

0.79 inch Pressure drop through 6 row coil see wet 1/2" tube at: 500 FPM

0.22 inch Pressure drop for ﬂat ﬁlter section, pleated 2" ﬁlter at: 10025 Divided By 24.4 = 411 FPM + 0.50 inch External static pressure

1.68 inch Total static pressure

6. Look at page 27, “Fan performance”: Select a 5 HP motor for the condition of 10000 CFM and less than 1.75 inches of water.

7. Air handler description and performance: Description: Performance: HCS model size 20 10025 CFM at 1.68" total static and with 6 row 10FPI, type A, cooling coil 0.5" external static pressure with 1 row 10 FPI, type 5, heating coil 430 MBH total cooling capacity and with open 5 HP motor at 230/3/60 volts 292 MBH sensible cooling capacity with (See page 10) 80°F. DB/ 67°F. WB entering air with 120% adjustable drive and 44 °F entering water at with motor starter 85.8 GPM and 13.5 feet of with ﬂat ﬁlter section ﬂuid pressure drop with 35% efﬁcient 2" ﬁlters 502 MBH of heating capacity with with (6) rubber in shear vibration isolators 60°F. entering air and 200°F. for ceiling mount (see page 38) entering water at 64.5 gpm and 12.3 feet of ﬂuid pressure drop

8. To estimate performance of coils at other than 10 FPI, or different row depths, or different air speeds or temperature conditions see tables on page 20 - 23, or call your representative. With your representative, you can have speciﬁc computer selected coils for your job conditions.

Air Handler Performance - Quick Reference

Table 1 Heating and Cooling Performance for Selected Coils

At 500 FPM (2.54 m/s) and 10 FPI.

See notes for coil descriptions and rating conditions.

Note 1 Note 2 Note 3 Note 4 Note 5 Note 6 Note 7 air volume at air handler DX air Refrigerant Chilled water Hot water Steam Unit 500 fpm 2.54 m/s face area conditioning Heat reclaim A/C Heating Heating Size CFM cu m/h SQ FT sq m MBH KW MBH KW MBH KW MBH KW MBH KW

03 1565 2659 3.13 0.29 58 17.0 50 14.7 73 21.4 177 51.9 93 27.3

06 2880 4893 5.76 0.54 110 32.2 92 27.0 136 39.9 341 99.9 179 52.4

08 3905 6635 7.81 0.73 150 44.0 124 36.3 179 52.5 452 132.4 254 74.4

10 4885 8300 9.77 0.91 190 55.7 156 45.7 229 67.1 548 160.6 317 92.9

12 6200 10534 12.40 1.15 241 70.6 198 58.0 286 83.8 684 200.4 395 115.7

14 7290 12386 14.58 1.36 284 83.2 232 68.0 328 96.1 812 237.9 465 136.2

18 8855 15045 17.71 1.65 345 101.1 282 82.6 418 122.5 1034 303.0 571 167.3

20 10025 17033 20.05 1.86 390 114.3 319 93.5 472 138.3 1162 340.5 651 190.7

26 13280 22563 26.56 2.47 520 152.4 423 124.0 616 180.5 1520 445.4 859 251.7

34 16825 28586 33.65 3.13 659 193.1 536 157.1 814 238.5 2026 593.6 1145 335.5

41 20365 34601 40.73 3.79 797 233.5 649 190.2 978 286.6 2406 705.0 1360 398.5

50 25313 43008 50.63 4.70 992 290.7 807 236.5 1196 350.4 2637 772.6 1586 464.7

65 32290 54861 64.58 6.00 1253 367.1 1029 301.5 1549 453.9 3798 1112.8 1848 541.5

75 37675 64011 75.35 7.00 1462 428.4 1200 351.7 1792 525.1 4407 1291.3 2156 631.7

Notes

Note 1 - Air volume in CFM and cubic meters per hour for air speed of 500 fpm or 2.54 meter per second through a large face area 1/2" tube diameter (Type A) coil for each air handler model. See pages 42 & 43 for range of air volumes for each model.

Note 2 - Face area of large size 1/2" diameter tube coil for each air handler in square feet and square meters. 5/8" & 1" diameter tube coils have slightly smaller face areas. See page 42 & 43 for other coils.

Note 3 - Direct expansion halocarbon air conditioning in thousands of BTUH and kilowatts. Performance is for a 1/2" tube, 4 row, 10 FPI coil with 40°F. (4.4ºC.) evaporating temperature and entering air temperatures at 80°F. (26.7ºC.) dry bulb and 67°F. (19.4ºC.) wet bulb. See pages 14, 15, and 21 for other coils and conditions.

Note 4 - Halocarbon refrigerant gas heat reclaim (thousands of BTUH and kilowatts). Performance is for a 1/2" tube, 3 row, 10FPI coil with a 50°F. TD (or 27.7 degrees centigrade of temperature difference) between entering air and condensing temperature. See page 20 for other coils and conditions.

Note 5 - Chilled water air conditioning in thousands of BTUH or kilowatts. Performance is for a 5/8" tube, 6 row, 10FPI coil with 44°F. (6.7ºC.) entering water temperature. Entering air temperatures are 80°F. (26.7ºC.) dry bulb and 67°F. (19.4ºC.) wet bulb. The ﬂuid pressure drop is less than 25 feet (0.76 kilogram per square centimeter) and the water velocity is less than 6 fps (1.83 meters per second). See pages 16,17,and 22 for other coils and conditions.

Note 6 - Hot water heating performance in thousands of BTUH or kilowatts. Performance is for a 5/8" tube, 2 row, 10 FPI coil with 200°F. (93.3ºC.) entering water temperature. The entering air temperature is 0°F. (-18°C.). The ﬂuid pressure drop is less than 25 feet (0.76 kilogram per square centimeter) and the water velocity is less than 6 fps (1.83 meters per second). See pages 18, 19, and 23 for more coils.

Note 7 - Steam heating performance in thousands of BTUH or kilowatts. The coils are 5/8" tube, 1 row, and 10 FPI (coils for models 65 and 75 are 1" diameter tubes). The entering air temperature is 60°F. (15.6ºC.) and the steam pressure is 5 psig (1.38 kilogram per square centimeter). See pages 18, 19, and 23 for other coils and conditions.

Air Handler Performance- Direct Expansion

Table 2 Comfort Cooling

1/2" tube, entering air at 80°F. DB and 67°F. WB**

1/2" Tube , direct expansion, cooling capacities

10 FPI**, large coils, 500 FPM**

CFM Coil MBH - 4 ROWS MBH - 6 ROWS

Unit Std Face 35°F. SST 40°F. SST 45°F. SST 35°F. SST 40°F. SST 45°F. SST

Size Air Area Total Sens. Total Sens. Total Sens. Total Sens. Total Sens. Total Sens.

03 1565 3.13 70 44 58 38 44 33 87 53 75 48 61 42 06 2880 5.76 132 81 110 72 90 64 163 99 138 88 114 78 08 3905 7.81 177 110 150 99 123 88 219 133 189 119 154 105 10 4885 9.77 224 139 190 125 152 109 278 168 235 150 192 131 12 6200 12.40 284 177 241 157 194 140 353 214 301 191 242 166 14 7290 14.58 336 207 284 187 231 165 416 253 354 225 290 197 18 8855 17.71 408 250 345 226 280 201 505^ 308 428 272 352 242 20 10025 20.05 459 282 390 256 319 226 568 343 489 308 399 273 26 13280 26.56 614 379 520 338 418 300 762^ 461 648^ 411 524 358 34 16825 33.65 778^ 480 659^ 428 530^ 380 966^ 584 821^ 520 664^ 454 41 20365 40.73 942^ 581 797^ 518 641^ 460 1168^^ 706 994^^ 630 804^ 549 50 25313 50.63 1169^ 721 992^ 648 803^ 577 1488* 875 1239* 788 1002* 686 65 32290 64.58 1447^ 905 1253^ 827 1035^ 742 1820* 1104 1574* 995 1293* 884 75 37675 75.35 1689* 1056 1462* 965 1208* 866 2124* 1288 1836* 1161 1509* 1032

Table 3 Comfort Cooling

5/8" tube, entering air at 80°F. DB and 67°F. WB**

5/8" Tube, direct expansion, cooling capacities

10 FPI**, large coils, 500 FPM**

CFM Coil MBH - 4 ROWS MBH - 6 ROWS

Unit Std Face 35°F. SST 40°F. SST 45°F. SST 35°F. SST 40°F. SST 45°F. SST

Size Air Area Total Sens. Total Sens. Total Sens. Total Sens. Total Sens. Total Sens.

03 1500 3.00 75 47 62 42 48 37 88 54 76 49 63 43 06 2844 5.69 138 88 111 77 84 67 173 105 147 94 118 81 08 3750 7.50 178 114 157 106 129 95 228 139 192 122 152 106 10 4690 9.38 234 148 192 130 157 116 283 173 244 156 198 136 12 5844 11.69 296 186 246 165 192 144 346 212 301 192 249 169 14 6875 13.75 349 220 295 196 235 172 412 253 345 221 290 199 18 8750 17.50 444 280 375 249 299 219 536 326 455 289 369 254 20 9625 19.25 467 297 408 273 335 245 591 360 500 317 412 279 26 12750 25.50 651 408 540 362 422 314 779^ 475 665 421 547 371 34 17000 34.00 868^ 544 720^ 482 563 418 1039^ 633 886^ 562 729^ 495 41 20188 40.38 1030^ 646 855^ 573 669 497 1234^ 752 1052^ 667 866^ 587 50 24750 49.50 1268^ 790 1059^ 709 830^ 610 1520* 923 1282^ 817 1062^ 722 65 32292 64.58 1651^ 1032 1401^ 933 1116^ 809 1989* 1212 1692* 1067 1369^ 937 75 37458 74.92 1915^ 1197 1625^ 1082 1295^ 939 2307* 1405 1962* 1238 1588^ 1087

SST = Saturated Suction Temperature All coils have single refrigerant distributors unless noted as below: MBH = BTU per Hour in Thousands ^ These selections require two circuits. Sens. = Sensible Capacity ^^ These selections require three circuits. * These selections require four circuits.

** To estimate performance of coils at other than 10 FPI or at other air speeds or with other refrigerant or air temperatures see page 21, or call your representative. With your representative, you can have speciﬁc computer selected coils rated for your job conditions.

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