Bard W12A2-A User Manual

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INSTALLATION INSTRUCTIONS

WALL MOUNTED

PACKAGE AIR CONDITIONERS

Model:

W12A2-A

W12A1-K

Bard Manufacturing Company, Inc.

Manual:

2100-509E

 

Bryan, Ohio 43506

 

Supersedes:

2100-509D

 

Since 1914....Moving ahead just as planned.

File:

Volume III Tab 16

 

 

Date:

08-20-12

 

 

 

 

 

 

 

 

 

 

Manual

2100-509E

 

 

 

 

Page

1 of 17

 

CONTENTS

Getting Other Informations and Publications

3

Wall Mount General Information

 

Air Conditioner Wall Mount Model Nomenclature

.......4

Shipping Damage.......................................................

6

General.......................................................................

6

Duct Work...................................................................

7

Filters..........................................................................

7

Fresh Air Intake..........................................................

7

Condensate Drain.......................................................

7

Installation Instructions

 

Wall Mounting Information..........................................

8

Mounting the Unit.......................................................

8

Wiring – Main Power................................................

12

Wiring – Low Voltage Wiring.....................................

12

Figures

 

 

Figure 1

Unit Dimensions.......................................

5

Figure 2

Fresh Air Damper.....................................

7

Figure 3

Mounting Instructions...............................

9

Figure 4 Wall Mounting Instructions......................

10

Figure 5 Wall Mounting Instructions......................

10

Figure 6 Common Wall Mounting

 

 

Instructions.............................................

11

Figure 7 Fan Blade Setting Dimensions...............

16

Start Up

 

Requirements: R-410A.............................................

13

Important Installer Note............................................

14

Service Hints............................................................

14

High & Low Pressure Switch....................................

14

Sequence of Operation.............................................

14

Compressor Control Module.....................................

14

Adjustments..............................................................

15

Pressure Service Ports.............................................

15

Troubleshooting

 

Fan Blade Setting Dimension...................................

16

Refrigerant Charge...................................................

16

Pressure Table..........................................................

17

Optional Field Installed Accessories.........................

17

Tables

 

 

Table 1

Electric Heat Table....................................

4

Table 2

Electrical Specifications............................

6

Table 3

Fan Blade Dimensions...........................

16

Table 4

Recommended Operating Ranges.........

16

Table 5

Indoor Blower Performance....................

16

Table 6

Maximum ESP of Operation

 

 

Electric Heat Only...................................

16

Table 7

Pressure Table - Cooling........................

17

Table 8

Optional Accessories..............................

17

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GETTING OTHER INFORMATION and PUBLICATIONS

These publications can help you install the air conditioner or heat pump. You can usually find these at your local library or purchase them directly from the publisher. Be sure to consult current edition of each standard.

National Electrical Code........................

ANSI/NFPA 70

Standard for the Installation of...........

ANSI/NFPA 90A

Air Conditioning and

 

Ventilating Systems

 

Standard for Warm Air Heating..........

ANSI/NFPA 90B

and Air Conditioning Systems

 

Load Calculation for ...........................

ACCA Manual J

Residential Winter and

 

Summer Air Conditioning

 

Duct Design for .................................

ACCA Manual D

Residential Winter and

 

Summer Air Conditioning

 

and Equipment Selection

 

For more information, contact these publishers:

ACCA

Air Conditioning Contractors of America

 

1712 New Hampshire Avenue NW

 

Washington, DC 20009

 

Telephone: (202) 483-9370

 

Fax: (202) 234-4721

ANSI

American National Standards Institute

 

11 West Street, 13th Floor

 

New York, NY 10036

 

Telephone: (212) 642-4900

 

Fax: (212) 302-1286

ASHRAE American Society of Heating, Refrigerating

and Air Conditioning Engineers, Inc.

1791 Tullie Circle, NE

Atlanta, GA 30329-2305

Telephone: (404) 636-8400

Fax: (404) 321-5478

NFPA

National Fire Protection Association

 

Batterymarch Park

 

P.O. Box 9101

 

Quincy, MA 02269-9901

 

Telephone: (800) 344-355

 

Fax: (617) 984-7057

Manufactured under the following U.S. patent numbers: 5,485,878 and 5,301,744

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WALL MOUNT GENERAL INFORMATION

AIR CONDITIONER WALL MOUNT MODEL NOMENCLATURE

W

12

A

2

A

00

X

X

X

X

X

J

MODEL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NUMBER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REVISIONS

 

 

 

 

 

 

 

 

 

 

 

CAPACITY

 

 

 

 

 

 

 

 

 

 

CONTROL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MODULES

12 - 1 Ton

 

 

 

 

 

 

 

 

 

 

 

 

E - Low Ambient

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Control

 

AIR

 

VOLTS & PHASE

KW

 

 

 

 

 

 

 

J

- Telecommunication

 

 

 

 

 

 

 

 

 

 

 

 

CONDITIONER

 

 

 

 

 

 

 

 

 

 

 

 

A - 230/208/60/1

00 - No KW

 

 

 

 

 

 

 

COIL OPTIONS

 

 

 

 

 

 

 

 

 

 

 

 

 

K - 115/60/1

02 - 2.2 KW

 

 

 

 

 

 

 

X - Standard Coils

 

 

 

 

 

 

03 - 3.6 KW

 

 

COLOR OPTIONS

 

 

 

 

 

 

 

 

 

 

 

05 - 5.0 KW

 

 

X - Beige

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4 - Buckeye Gray

 

OUTLET OPTIONS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X -

Front

 

 

 

 

 

 

VENTILATION OPTIONS

 

FILTER OPTIONS

 

 

 

 

 

 

 

 

 

 

 

X - Barometric Fresh Air

 

 

 

 

 

 

 

 

 

 

 

 

Damper (Standard)

 

X - 1-Inch Throwaway

 

 

 

 

 

 

 

 

 

 

 

B - Blank-off Plate

 

(Standard)

 

 

 

 

 

 

 

 

 

 

 

E - Economizer (Internal) - Fully

 

P - 2-Inch Pleated

 

 

 

 

 

 

 

Modulating with Exhaust

V - Commercial Ventilator -

Motorized with Exhaust

TABLE 1

ELECTRIC HEAT TABLE

Models

 

 

W12A2-A

 

 

 

W12A1-K

 

 

240V

 

208V

 

120V

KW

A

 

j

A

 

j

A

 

j

 

BTU

 

BTU

 

BTU

 

 

 

 

 

 

 

02

 

 

 

 

 

 

18.3

 

7,985

 

 

 

 

 

 

 

 

 

 

03

15.0

 

12,760

13.0

 

9,705

 

 

 

05

20.8

 

17,540

18.1

 

13,275

 

 

 

j With blower watts included

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FIGURE 1

 

 

 

 

UNIT DIMENSIONS

 

 

 

32.00

 

 

 

 

30.13

 

 

 

 

17.00

 

17.00

 

 

Supply Air

2.25

Supply Air

 

 

5.00

5.00

 

Opening

Opening

 

2.00*

 

 

 

 

5.00*

 

 

 

 

 

Return Air

10.00

 

 

 

Opening

Return Air

 

 

 

10.00

 

 

 

 

 

 

Opening

 

 

 

 

 

Top Rain Flashing

 

 

 

 

Shipping Location

 

 

 

 

Optional Electrical

26.75

 

 

 

Entrance

 

23.75

20.25

 

 

 

 

Side Wall Mounting

 

 

 

 

 

 

 

 

Flanges (Built In)

 

2.50

Back View

 

Back View

 

 

Return air opening is in upper

 

Return air opening is in lower

 

 

field convertible position

 

factory standard position

 

 

31.06

Built-in Rain

 

Hood 4° Pitch

 

 

 

 

Electric Heat

 

 

Heater and Filter

 

 

Access

 

19.72

Ventilation Air

 

 

 

 

Circuit Breaker

 

 

(Optional)

 

 

Electrical

 

 

Entrance

 

 

Low Voltage

 

 

Entrance

 

19.72

18.25

 

 

1.75

Front View

Condenser Airflow

 

 

is Blow Thru

14.63

1.50

Control

Panel

46.00

19.88

Right Side View

( * ) Position of return air flanges are interchangeable between two positions. Factory built at 5 inches.

Note: Maintain a minimum of 20 inches clearance on right side to allow access to control panel and MIS-2608 A allow proper airflow to outdoor condenser coil. Allow 15 inches on left side.

(*) Position of return air flanges are interchangeable between two positions. Factory built at 5 inches.

NOTE: Maintain a minimum of 20 inches clearance on right side to allow access to control panel and allow proper airflow to outdoor condenser coil. Allow 15 inches on left side.

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TABLE 2

ELECTRICAL HEAT SPECIFICATIONS

SINGLE CIRCUIT

 

Rated Volts

No. Field

j

 

 

 

Maximum

k

k

 

Minimum

Models

and

Power

External Fuse

Field Power

Ground

Circuit

 

Phase

Circuits

or Circuit

Wire Size

Wire Size

 

Ampacity

 

 

 

Breaker

 

 

 

 

 

 

 

 

W12A2-A00

 

1

9

15

14

14

A03

230/208-1

1

20

20

12

12

A05

 

1

28

30

10

10

W12A1-K00

115-1

1

20

30

10

10

K02

1

29

30

10

10

 

Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.

Based on 75°C copper wire. All wiring must conform to NEC and all local codes.

These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors. Refer to the National

Electrical Code (latest revision), article 310 for power conductor sizing.

CAUTION: When more than one field power conductor circuit is run through one conduit, the conductors must be derated. Pay special attention to note 8 of table 310 regarding Ampacity Adjustment Factors when more than 3 conductors are in a raceway.

SHIPPING DAMAGE

Upon receipt of equipment, the carton should be checked for external signs of shipping damage. If damage is found, the receiving party must contact the last carrier immediately, preferably in writing, requesting inspection by the carrier’s agent.

GENERAL

The equipment covered in this manual is to be installed by trained, experienced service and installation technicians.

The refrigerant system is completely assembled and charged. All internal wiring is complete.

The unit is designed for use with or without duct work. Flanges are provided for attaching the supply and return air ducts.

These instructions explain the recommended method to install the air cooled self-contained unit and the electrical wiring connections to the unit.

These instructions and any instructions packaged with any separate equipment required to make up the entire air conditioning system should be carefully read before beginning the installation. Note particularly “Starting Procedure” and any tags and/or labels attached to the equipment.

While these instructions are intended as a general recommended guide, they do not supersede any national and/or local codes in any way. Authorities having jurisdiction should be consulted before the installation is made. See Page 3 for information on codes and standards.

Size of unit for a proposed installation should be based on heat loss/gain calculation made according to methods of Air Conditioning Contractors of America (ACCA). The air duct should be installed in accordance with the Standards of the National Fire Protection Association for the Installation of Air Conditioning and Ventilating Systems of Other Than Residence Type, NFPA No. 90A, and Residence Type Warm Air Heating and Air Conditioning Systems, NFPA No. 90B. Where local regulations are at a variance with instructions, installer should adhere to local codes.

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DUCT WORK

All duct work, supply and return must be properly sized for the design air flow requirement of the equipment.

Air Conditioning Contractors of America (ACCA) is an excellent guide to proper sizing. All duct work or portions thereof not in the conditioned space should be properly insulated in order to both conserve energy and prevent condensation or moisture damage.

Refer to Table 6 for maximum static pressure available for duct design.

Design the duct work according to methods given by the Air Conditioning Contractors of America (ACCA). When duct runs through unheated spaces, it should be insulated with a minimum of one inch of insulation. Use insulation with a vapor barrier on the outside of the insulation. Flexible joints should be used to connect the duct work to the equipment in order to keep the noise transmission to a minimum.

Ducts through the walls must be insulated and all joints taped or sealed to prevent air or moisture entering the wall cavity.

Some installations may not require any return air duct. It is recommended that on this type of installation that a filter grille be located in the wall. Filters must be of

sufficient size to allow a maximum velocity of 400 FPM.

NOTE: If no return air duct is used, applicable installation codes may limit this cabinet to installation only in a single story structure.

FILTERS

A one inch throwaway filter is supplied with each unit. The filter slides into position making it easy to service. This filter can be serviced from the outside by removing the service door. A 2-inch pleated filter is also available as an optional accessory. The internal filter brackets are adjustable to accommodate the 2-inch filter by bending the metal tabs holding the 1-inch filter down. There are two tabs on each side of the filter.

FRESH AIR INTAKE

All units are built with fresh air inlet slots punched in the service panel.

If the unit is equipped with a fresh air damper assembly, the assembly is shipped already attached to the unit. The damper blade is locked in the closed position. To allow the damper to operate, the maximum and minimum blade position stops must be installed. See Figure 2.

All capacity, efficiency and cost of operation information as required for Department of Energy “Energyguide” Fact Sheets is based upon the fresh air blank-off plate

in place and is recommended for maximum energy efficiency.

The blank-off plate is available upon request from the factory and is installed in place of the fresh air damper shipped with each unit.

CONDENSATE DRAIN

This unit employs an automatic condensate disposal system consisting of a base drain pan, drain valve and fan blade with slinger ring. A plastic drain hose extends from the evaporator drain pain at the top of the unit to the base drain pan at the bottom. At temperatures above 40°, the drain valve located between the condenser coil and fan shroud is closed allowing water to build up in the base to a height of 5/8" to 3/4". The fan blade with slinger then rotates in this water and throws the water onto the condenser coil. This disposes of the water by evaporating it on the hot condenser.

At temperatures below 40°, the drain valve opens draining the base pan and preventing freeze ups that could damage the coil or fan blade.

FIGURE 2

FRESH AIR DAMPER

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INSTALLATION INSTRUCTIONS

WALL MOUNTING INFORMATION

1.These units are secured by wall mounting brackets which secure the unit to the outside wall surface at both sides.

2.On wood frame walls, the wall construction must be strong and rigid enough to carry the weight of the unit without transmitting any unit vibration.

3.Concrete block walls must be thoroughly inspected to insure that they are capable of carrying the weight of the installed unit.

MOUNTING THE UNIT

1.Two holes, for the supply and return air openings, must be cut through the wall as shown in Figure 3.

2.Locate and mark lag bolt locations, if desired. See Figure 3.

3.Hook top rain flashing under back bend of top. Top rain flashing is shipped attached to the back of the unit on the right side.

4.Position unit in opening and secure with 5/16 lag bolts; use 7/8 inch diameter flat washers on the lab bolts.

5.Secure rain flashing to wall and caulk across entire length of top. See Figure 3.

6.For additional mounting rigidity, the return air and supply air frames or collars can be drilled and screwed or welded to the structural wall itself (depending upon wall construction). Be sure to observe required clearance if combustible wall.

7.On side-by-side installations, maintain a minimum of 20 inches clearance on right side to allow access to control panel and allow proper airflow to outdoor coil. Additional clearance may be required to meet local or national codes.

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MOUNTING INSTRUCTIONS

FIGURE 3

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FIGURE 4

WALL MOUNTING INSTRUCTIONS

SEE FIGURE 3 - MOUNTING INSTRUCTIONS

FIGURE 5

WALL MOUNTING INSTRUCTIONS

SEE UNIT DIMENSIONS, FIGURE 1,

FOR ACTUALDIMENSIONS

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FIGURE 6

COMMON WALL-MOUNTING INSTALLATIONS

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WIRING – MAIN POWER

Refer to the unit rating plate for wire sizing information and maximum fuse or “HACR” type circuit breaker size. Each outdoor unit is marked with a “Minimum Circuit

Ampacity”. This means that the field wiring used must be sized to carry that amount of current. Depending on the installed KW of electric heat, there may be two field power circuits required. If this is the case, the unit serial plate will so indicate. All models are suitable only for connection with copper wire. Each unit and/or

wiring diagram will be marked “Use Copper Conductors Only”. These instructions must be adhered to. Refer to the National Electrical Code (NEC) for complete current carrying capacity data on the various insulation grades of wiring material. All wiring must conform to NEC and all local codes.

The electrical data lists fuse and wire sizes (75°C copper) for all models, including the most commonly used heater sizes. Also shown are the number of field power circuits required for the various models with heaters.

The unit rating plate lists a “Maximum Time Delay Relay Fuse” of “HACR” type circuit breaker that is to be used with the equipment. The correct size must be used for proper circuit protection and also to assure that there will be no nuisance tripping due to the momentary high starting current of the compressor motor.

For wiring size and connections, refer to Wiring Manual 2100-507.

WIRING – LOW VOLTAGE WIRING

230/208, 1 phase equipment use dual primary voltage transformers. All equipment leaves the factory wired on 240V tap. For 208V operation, reconnect from 240V to 208V tap. The acceptable operating voltage range for the 240 and 208V taps are:

Tap

Range

240

253 - 216

208

220 - 187

NOTE: The voltage should be measured at the field power connection point in the unit and while the unit is operating at full load (maximum amperage operating condition).

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START UP

THESE UNITS REQUIRE R-410A REFRIGERANT AND POLYOL ESTER OIL.

GENERAL:

1.Use separate service equipment to avoid cross contamination of oil and refrigerants.

2.Use recovery equipment rated for R-410A refrigerant.

3.Use manifold gauges rated for R-410A (800 psi/250 psi low).

4.R-410A is a binary blend of HFC-32 and HFC-125.

5.R-410A is nearly azeotropic - similar to R-22 and R-12. Although nearly azeotropic, charge with liquid refrigerant.

6.R-410A operates at 40-70% higher pressure than R-22, and systems designed for R-22 cannot withstand this higher pressure.

7.R-410A has an ozone depletion potential of zero, but must be reclaimed due to its global warming potential.

8.R-410A compressors use Polyol Ester oil.

9.Polyol Ester oil is hygroscopic; it will rapidly absorb moisture and strongly hold this moisture in the oil.

10.A liquid line dryer must be used - even a deep vacuum will not separate moisture from the oil.

11.Limit atmospheric exposure to 15 minutes.

12.If compressor removal is necessary, always plug compressor immediately after removal. Purge with small amount of nitrogen when inserting plugs.

TOPPING OFF SYSTEM CHARGE

If a leak has occurred in the system, Bard Manufacturing recommends reclaiming, evacuating (see criteria above), and charging to the nameplate charge. If done correctly, topping off the system charge can be done without problems.

With R-410A, there are no significant changes in the refrigerant composition during multiple leaks and recharges. R-410A refrigerant is close to being an azeotropic blend (it behaves like a pure compound or single component refrigerant). The remaining refrigerant charge, in the system, may be used after leaks have occurred and then “top-off” the charge by utilizing the pressure charts on the inner control panel cover as a guideline.

REMEMBER: When adding R-410A refrigerant, it must come out of the charging cylinder/tank as a liquid to avoid any fractionation, and to insure optimal system performance. Refer to instructions for the cylinder that is being utilized for proper method of liquid extraction.

WARNING

Failure to conform to these practices could lead to damage, injury or death.

SAFETY PRACTICES:

1.Never mix R-410A with other refrigerants.

2.Use gloves and safety glasses, Polyol Ester oils can be irritating to the skin, and liquid refrigerant will freeze the skin.

3.Never use air and R-410A to leak check; the mixture may become flammable.

4.Do not inhale R-410A – the vapor attacks the nervous system, creating dizziness, loss of coordination and slurred speech. Cardiac irregularities, unconsciousness and ultimate death can result from breathing this concentration.

5.Do not burn R-410A. This decomposition produces hazardous vapors. Evacuate the area if exposed.

6.Use only cylinders rated DOT4BA/4BW 400.

7.Never fill cylinders over 80% of total capacity.

8.Store cylinders in a cool area, out of direct sunlight.

9.Never heat cylinders above 125°F.

10.Never trap liquid R-410A in manifold sets, gauge lines or cylinders. R-410A expands significantly at warmer temperatures. Once a cylinder or line is full of liquid, any further rise in temperature will

cause it to burst.

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START UP

IMPORTANT INSTALLER NOTE

For improved start up performance, wash the indoor coil with a dishwasher detergent.

SERVICE HINTS

1.Caution owner to maintain clean air filters at all times. Also not to needlessly close off supply and return air registers. This reduces airflow through the system which shortens equipment service life as well as increasing operation costs.

2.The unit is equipped with a high pressure cut out switch.

3.Check all power fuses or circuit breakers to be sure they are the correct rating.

4.Periodic cleaning of the outdoor coil to permit full and unrestricted airflow circulation is essential.

HIGH & LOW PRESSURE SWITCH

The W12Aà models are supplied with a remote reset high and low pressure switch. If tripped, this pressure switch may be reset by turning the thermostat off then back on again.

SEQUENCE OF OPERATION

HEATING – Circuit R-Y makes at thermostat pulling in compressor contactor, starting the compressor

and outdoor motor. The G (indoor motor) circuit is automatically completed on any call for cooling operation or can be energized by manual fan switch

on subbase for constant air circulation. On a call for heating, circuit R-W1 make at the thermostat pulling in heat contact for the strip heat and blower operation.

COMPRESSOR CONTROL MODULE

The compressor control module is optional on the models covered by this manual. The compressor control is an anti-short cycle/lockout timer with high and low pressure switch monitoring and alarm relay output.

Adjustable Delay on Make and Break Timer

On initial power up or any time power is interrupted to the unit the delay on make period begins, which will be 2 minutes plus 10% of the delay on break setting. When the delay on make is complete and the high pressure switch (and low pressure switch if employed) is closed, the compressor contactor is energized. Upon shutdown the delay on break time starts and prevents restart until the delay on break and delay on make periods have expired.

During routine operation of the unit with no power interruptions the compressor will operate on demand with no delay.

High Pressure Switch and Lockout Sequence

If the high pressure switch opens, the compressor contactor will de-energize immediately. The lockout timer will go into a soft lockout and stay in soft lockout until the high pressure switch closes and the delay on break time has expired. If the high pressure switch opens again in this same operating cycle the unit will go into manual lockout condition and the alarm relay circuit will energize. Recycling the wall thermostat resets the manual lockout.

Low Pressure Switch, Bypass and Lockout Sequence

If the low pressure switch opens for more than 120 seconds, the compressor contactor will de-energize and go into a soft lockout. Regardless the state of the low pressure switch, the contactor will reenergize after the delay on make time delay has expired. If the low pressure switch remains open, or opens again for longer that 120 seconds, the unit will go into manual lockout condition and the alarm relay circuit will energize.

Recycling the wall thermostat resets the manual lockout.

Alarm Relay Output

Alarm terminal is output connection for applications where alarm relay is employed. This terminal is powered whenever compressor is locked out due to HPC or LPC sequences as described.

NOTE: Both high and low pressure switch controls are inherently automatic reset devices. The high pressure switch and low pressure switch cut out and cut in settings are fixed by specific air conditioner or heat pump unit model. The lockout features, both soft and manual, are a function of the Compressor Control Module.

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ADJUSTMENTS

Adjustable Delay on Make and Delay on Break Timer

The potentiometer is used to select Delay on Break time from 30 seconds to 5 minutes. Delay of Make (DOM) timing on power up and after power interruptions is equal to 2 minutes plus 10% of Delay of Break (DOB) setting:

0.5 minute (30 seconds)

DOB = 123 second DOM

1.0 minute (60 seconds)

DOB = 126 second DOM

2.0 minute (120 seconds)

DOB = 132 second DOM

3.0 minute (180 seconds)

DOB = 138 second DOM

4.0 minute (240 seconds)

DOB = 144 second DOM

5.0 minute (300 seconds)

DOB = 150 second DOM

During routine operation of the unit with no power interruptions the compressor will operate on demand with not delay.

Typical Settings for Dual Unit Installation:

Unit No. 1: DOB set at 2 minutes, and DOM is 132 seconds.

Unit No. 2: DOB set at 4 minutes, and DOM is 144 seconds.

PRESSURE SERVICE PORTS

High and low pressure service ports are installed on all units so that the system operating pressures can be

observed. Pressure chart can be found later in the manual covering all models. It is imperative to match the correct pressure chart to the unit by model number.

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TROUBLESHOOTING

FAN BLADE SETTING DIMENSIONS

Shown in Figure 7 is the correct fan blade setting dimension for proper air delivery across the outdoor coil.

Any service work requiring removal or adjustment in the fan and/or motor area will require that the dimension below be checked and blade adjusted in or out on the motor shaft accordingly.

FIGURE 7

FAN BLADE SETTING DIMENSION

TABLE 3

FAN BLADE DIMENSION

Model

Dimension A

 

 

W12Aà

1/2"

R-410A

REFRIGERANT CHARGE

This unit was charged at the factory with the quantity of refrigerant listed on the serial plate. AHRI capacity and efficiency ratings were determined by testing with this refrigerant charge quantity.

The following pressure tables show nominal pressures for the units. Since many installation specific situations can affect the pressure readings, this information should only be used by certified technicians as a guide for evaluating proper system performance. They shall not be used to adjust charge. If charge is in doubt, reclaim, evacuate and recharge the unit to the serial plate charge.

TABLE 4

INDOOR BLOWER

PERFORMANCE

CFM @ 230V / 115V

E.S.P.

 

 

W12Aà

 

 

230V / 115V

 

in

 

 

H2O

Dry / Wet

 

Dry / Wet

 

High

 

Low

.0

530

/ 500

 

465

/ 425

.1

485

/ 460

 

415

/ 400

.2

440

/ 425

 

365

/ 350

.3

390

/ 375

 

315

/ 300

.4

325

/ 300

 

270

/ 265

TABLE 5

RATED CFM AND ESP

RECOMMENDED AIRFLOW RANGE

Model

°

°

Recommended

Rated

Rated

Airflow Range

 

CFM

ESP

 

 

 

 

 

 

W12Aà

400

.10

500 - 300

° Rated CFM and ESP on low speed tap.

TABLE 6

MAXIMUM ESP OF OPERATION

ELECTRIC HEAT ONLY

Model

ESP

W12A2-A00

.35

A03

.35

A05

.35

W12A1-K00

.35

K02

.35

Values shown are for units equipped with STD

1" throwaway filters. Derate ESP by .15 for 2" pleated filters.

Manual

2100-509E

Page

16 of 17

TABLE 7

PRESSURE TABLE

COOLING

 

 

 

 

Air Temperature Entering Outdoor Coil °F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Model

Return Air

Pressure

75°

80°

85°

90°

95°

100°

105°

100°

115°

Temperature

 

 

 

 

 

 

 

 

 

 

 

 

 

75 deg. DB

Low Side

120

124

129

133

136

138

141

142

143

 

62 deg. WB

High Side

291

310

332

355

379

405

432

460

490

W12Aà

80 deg. DB

Low Side

128

133

138

142

143

148

151

152

153

67 deg. WB

High Side

298

318

340

364

387

415

443

472

503

 

85 deg. DB

Low Side

132

138

143

147

150

153

156

157

158

 

72 deg. WB

High Side

308

329

352

377

403

430

459

489

521

Low Side Pressure +4 PSIG

High Side Pressure +10 PSIG

TABLE 8

OPTIONAL FIELD INSTALLED ACCESSORIES

Model

Description

W12Aà

BOP-1A

Blank Off Plate

X

BFAD-1

Barometric Fresh Air Damper

X

EIFM-1

Economizer with Exhaust

X

 

 

 

CMA-28

Low Ambient Control

X

 

 

 

CRVS-1

Commercial Ventilator - Spring Return

X

 

 

 

Manual

2100-509E

Page

17 of 17