INSTALLATION

INSTRUCTIONS

WALL MOUNTED PACKAGED

AIR CONDITIONER

Models: WE252 WE301

WE371 WE421

WE482 WE602

WE701

THESE MODELS ALL USE REFRIGERANT R-407C and ARE FOR 50HZ OPERATION.

MIS-383

Bard Manufacturing Company

Bryan, Ohio 43506

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

Manual No.: 2100-385B

Supersedes: 2100-385A

File: Volume III, Tab 16

Date: 04-25-05

© Copyright 2002

CONTENTS

Getting Other Information ...................................1

Wall Mount General Information

Model Nomenclature ............................................ 2

Shipping Damage ................................................ 5

General ................................................................ 5

Duct Work ............................................................ 5

Filters ................................................................... 6

Fresh Air Intake .................................................... 6

Condensate Drain ................................................ 6

Installation Instructions

Wall Mounting Information ................................... 7

Proper Unit Placement ......................................... 7

Mounting the Unit ................................................. 7

Wiring – Main Power .......................................... 12

Wiring – Low Voltage ......................................... 12

Start Up

Important Installer Note ...................................... 14

High Pressure Switch ........................................ 14

Service Hints ...................................................... 14

Sequence of Operations .................................... 14

Compressor Control Module .............................. 14

Adjustments ....................................................... 15

Phase Monitor .................................................... 15

Pressure Service Ports ...................................... 15

Troubleshooting

Fan Blade Setting Dimensions .......................... 16

Removal of Fan Shroud ..................................... 16

Refrigerant Charge ............................................ 16

Cooling Pressures ............................................. 18

Optional Accessories ......................................... 19

R-407C Refrigerant

Service Procedures & Considerations ............... 20

Charging ............................................................ 20

Leaks ................................................................. 20

Figures

Figure 1 Unit Dimensions ................................... 4

Figure 2 Fresh Air Damper Assembly ................ 6

Figure 3 Mounting Instructions ........................... 8

Figure 4 Electric Heat Clearance ....................... 9

Figure 5 Wall-Mounting Instructions ................. 10

Figure 6 Wall-Mounting Instructions ................. 10

Figure 7 Common Wall-Mounting Instructions . 11

Figure 8 Low Voltage Wiring Diagram ............. 13

Figure 9 Fan Blade Setting .............................. 16

Tables

Table 1 Electric Heat Table ............................... 2

Table 2 Electrical Specifications ....................... 3

Table 3 Thermostat Wire Size ........................ 12

Table 4 Wall Thermostat and

Subbase Combinations...................... 12

Table 5 Fan Blade Setting Dimension ............ 16

Table 6 Suction Line Temperatures ................ 16

Table 7 Rated CFM and ESP ......................... 16

Table 8 Indoor Blower Performance ............... 17

Table 9 Maximum ESP of Operation –

Electric Heat Only .............................. 17

Table 10 Cooling Pressures ............................. 18

Table 11 Optional Accessories ......................... 19

Table 12 R-407C Temperature/Pressure Chart 20

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 Warm Air ........................ ANSI/NFPA 90B

Heating and Air

Conditioning Systems

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

Standard for the Installation ................ ANSI/NFPA 90A of Air Conditioning and

Ventilating Systems ANSI American National Standards Institute

11 West Street, 13th Floor

New York, NY 10036

Telephone: (212) 642-4900

Fax: (212) 302-1286

Load Calculation for ............................. ACCA Manual J

Residential Winter and

Summer Air Conditioning

ASHRAE American Society of Heating Refrigerating, and Air Conditioning Engineers, Inc.

1791 Tullie Circle, N.E.

Atlanta, GA 30329-2305

Telephone: (404) 636-8400

Fax: (404) 321-5478

Duct Design for Residential ................ ACCA Manual D

Winter and Summer Air

Conditioning and Equipment

Selection NFPA National Fire Protection Association

Batterymarch Park

P.O. Box 9101

Quincy, MA 02269-9901

Telephone: (800) 344-3555

Fax: (617) 984-7057

Manufactured under the following U.S. patent numbers:

5,485,878; 5,301,744; 5,002,116;

4,924,934; 4,875,520; 4,825,936

Manual 2100-385B

Page 1

WALL MOUNT GENERAL INFORMATION

AIR CONDITIONER WALL MOUNT MODEL NOMENCLATURE

WE 42 1 — F 07 X X X X X J

MODEL NUMBER REVISIONS

KW

OUTLET OPTIONS

X - FRONT (STANDARD)

CONTROL

MODULES

CAPACITY

25 - 2 TON

30 - 2-1/2 TON

37 - 3 TON

42 - 3-1/2 TON

48 - 4 TON

60 - 5 TON

70 - 6 TON

VOLTS & PHASE

D - 240/220-50-1

F - 415/380-50-3

VENTILATION OPTIONS

X - BAROMETRIC FRESH AIR DAMPER

B - BLANK-OFF PLATE

M - MOTORIZED FRESH AIR DAMPER

V - COMMERCIAL VENTILATOR

MOTORIZED WITH EXHAUST

E - ECONOMIZER (INTERNAL) - FULLY

MODULATING WITH EXHAUST

R - ENERGY RECOVERY VENTILATOR -

MOTORIZED WITH EXHAUST

COLOR OPTIONS

X - BEIGE (STANDARD)

1 - WHITE

2 - MESA TAN

4 - BUCKEYE GRAY

5 - DESERT BROWN

FILTER OPTIONS

X - ONE INCH THROWAWAY

W - ONE INCH WASHABLE

P - TWO INCH PLEATED

COIL OPTIONS

X - STANDARD

1 - PHENOLIC COATED EVAPORATOR

2 - PHENOLIC COATED CONDENSER

3 - PHENOLIC COATED EVAPORATOR

AND CONDENSER

M o d e l s

K W

5 .

0

7 .

0

8 .

0

1 0 .

0

1 2 .

0

1 4 .

0

2 4

W E 2 5 2 D

0 V 1

W A T T

5 0 1 1

S

2 2 0 V -

W A T T

1

S

4 2 2 0

8 0 1 1 6 7 2 1

W E 2 5 2 F

4 1 5 V 3

W A T T S

4 4 8 4

3

W

8 0

A

3 7

T

V -

5 1

3

T S

TABLE 1

ELECTRIC HEAT TABLE

W E 3 0 1 D

W E 3 7 1 D

2 4 0 V -

W A T T

1

S

5 0 1 1

2

W

2

4

A

0 V 1

2

T T S

2 0

W E 3 0 1 F

W E 3 7 1 F

4 1 5 V 3

W A T T S

3 8 0 V 3

W A T T S

W E 4 2 1 F

W E 4 8 2 F

W E 6 0 2 F

W E 7 0 1 F

4 1 5 V 3

W A T T S

3 8 0 V 3

W A T T S

6 7 4 0 5 6 5 6 6 7 4 0 5 6 6 0

9 9 9 4 8 4 1 1

1 1 1 7 8 9 4 0 8

1 3 4 5 0 1 1 2 8 0

Manual 2100-385B

Page 2

TABLE 2

ELECTRICAL SPECIFICATIONS

M o d e l

W E 2 5 2 D 0 Z

D 0 5

D 0 8

W E 2 5 2 F 0 Z

F 0 5

W E 3 0 1 D 0 Z

D 0 5

D 1 0

W E 3 0 1 F 0 Z

F 0 7

F 1 2

R a t e d a n d P

V h o l t s a s e

2

4

2

4

4

1

4

1

0

5

0

5 /

/

/

/ 2

3

2

3

2

8

2

8

0

0

0

0

-

-

-

-

1

3

1

3

W E 3 7 1 D 0 Z

D 0 5

D 1 0

W E 3 7 1 F 0 Z

F 0 7

F 1 2

W E 4 2 1 F 0 Z

F 0 7

F 1 4

W E 4 8 2 F 0 Z

F 0 7

F 1 4

W E 6 0 2 F 0 Z

F 0 7

F 1 4

2

4

4

4

4

4

1

1

1

1

0

5

5

5

5 /

/

/

/

/ 2

3

3

3

3

2

8

8

8

8

0

0

0

0

0

-

-

-

-

1

3

3

3

3

O p e r a t i n g

V o l t a g e

R a n g e

1 9 8 2 5 4

3 4 2 4 5 6

1 9 8 2 5 4

3 4 2 4 5 6

1 9 8 2 5 4

3 4 2 4 5 6

3 4 2 4 5 6

3 4 2 4 5 6

3 4 2 4 5 6

N u m b e r

F i e l d P o w e r

C i r c u i t s

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

3

1

M a x i m u m

E x t e r n a l

F u s e o r C i r c u i t

B r e a k e r

2 0

2 0

3 0

2 0

2 0

3 0

3 5

3 5

6 0

1 5

2 0

2 5

1 5

2 0

3 0

3 5

3 5

6 0

1 5

1 5

2 5

2 0

3 0

4 5

1 5

1 5

M i n i m u m

C i r c u i t

A m p a c i t y

2 2

2 9

5 5

9

1 5

2 3

1 5

2 7

4 3

7

1 0

1 3

1 6

3 0

1 5

1 6

3 0

2 4

2 9

5 5

1 1

1 6

2 5

1 1

1 6

3 0

2

F i e l d P o w e r

W i r e S i z e

1 2

1 0

8

1 4

1 4

8

8

6

1 4

1 4

1 0

1 2

1 2

1 0

1 2

1 2

1 0

1 4

1 2

1 0

8

8

6

1 4

1 2

1 0

2

G r o u n d

W i r e S i z e

1 0

1 0

1 0

1 4

1 4

1 0

1 2

1 0

1 0

1 4

1 4

1 2

1 2

1 0

1 2

1 2

1 0

1 0

1 0

1 0

1 4

1 2

1 0

1 4

1 2

1 0

W E 7 0 1 F 0 Z

F 0 7

F 1 4

4 1 5 / 3 8 0 3 3 4 2 4 5 6

1

1

1

1 9

1 9

3 2

2 5

2 5

3 5

1 0

1 0

1 0

1 0

1 0

1 0

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

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

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

National Electric 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 three (3) conductors are in a raceway.

IMPORTANT: While this electrical data is presented as a guide, it is important to electrically connect properly sized fuses and conductor wires in accordance with all existing local codes.

Manual 2100-385B

Page 3

Manual 2100-385B

Page 4

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 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 1 for information on codes and standards.

Size of unit for a proposed installation should be based on heat loss 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.

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 9 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.

A 1/4 inch clearance to combustible material for the first

3 feet of duct attached to the outlet air frame is required.

See Wall Mounting Instructions and Figures 3 and 4 for further details.

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.

A metallic return air grille is required with installations not requiring a return air duct. The spacing between louvers on the grille shall not be larger than 5/8 inches.

Any grille that meets the 5/8 inch louver criteria may be used. It is recommended that Bard Return Air Grille Kit

RG-2 thru RG-5 or RFG-2 thru RFG-5 be installed when no return duct is used. Contact distributor or factory for ordering information. If using a return air filter grille, 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.

Manual 2100-385B

Page 5

FILTERS

A 1-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 1-inch washable filter and 2-inch pleated filter are also available as optional accessories.

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 the 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.

Capacity and efficiency 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

A plastic drain hose extends from the drain pan at the top of the unit down to the unit base. There are openings in the unit base for the drain hose to pass through. In the event the drain hose is connected to a drain system of some type, it must be an open or vented type system to assure proper drainage.

FIGURE 2

FRESH AIR DAMPER ASSEMBLY

BLADE IS LOCKED

CLOSED FOR

SHIPPING

MIS-938

Manual 2100-385B

Page 6

INSTALLATION INSTRUCTIONS

WALL MOUNTING INFORMATION

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

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.

PROPER UNIT PLACEMENT

Refer to Technical Bulletin TB01-4 “Wall Mount

Equipment Clearance for Proper Operation”. This bulletin will provide information concerning the placement of units as to clearance between dual unit installation (mounted on common wall) of units discharging against a wall or essentially solid barrier, and units discharging against opposing (facing) units.

MOUNTING THE UNIT

1. These units are secured by wall mounting brackets which secure the unit to the outside wall surface at both sides. A bottom mounting bracket is provided for ease of installation, but is not required.

2. The unit itself is suitable for 0 inch clearance, but the supply air duct flange and the first 3 feet of supply air duct require a minimum of 1/4 inch clearance to combustible material. However, it is highly recommended that a 1-inch clearance is used for ease of installation and maintaining the required clearance to combustible material. See Figures 3 and 4 for details.

3. Locate and mark lag bolt locations and bottom bracket location, if desired. See Figure 3.

4. Mount bottom mounting bracket, if used.

WARNING

Failure to provide the 1/4 inch clearance between the supply duct and a combustible surface for the first 3 feet of duct can result in fire causing damage, injury or death.

5. Hook top rain flashing under back bend of top. Top rain flashing is shipped secured to the right side of the back.

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

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

8. 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.

9. On side by side installations, maintain a minimum of

20 inches clearance on right side to allow access to control panel and heat strips, and to allow proper airflow to the outdoor coil. Additional clearance may be required to meet local or national codes.

MIS-1641

Manual 2100-385B

Page 7

Manual 2100-385B

Page 8

FIGURE 4

ELECTRIC HEAT CLEARANCE

SIDE SECTION VIEW OF SUPPLY AIR

DUCT FOR WALL MOUNTED UNIT

SHOWING 1/4 INCH CLEARANCE TO

COMBUSTIBLE SURFACES.

MIS-277

NOTE: A 1/4 inch clearance to combustible material for the first 3 feet of duct attached to the outlet air frame is required. However, it is highly recommended that a 1-inch clearance is used for ease of installation and maintaining the required clearance to combustible material

This requirement does not apply to Model WE252 as it is approved for 0 inch clearance of duct work.

WARNING

A minimum of 1/4 inch clearance must be maintained between the supply air duct and combustible materials. This is required for the first 3 feet of ducting.

It is important to insure that the 1/4 inch minimum spacing is maintained at all points.

Failure to do this could result in overheating the combustible material and may result in a fire causing damage, injury or death.

Manual 2100-385B

Page 9

SUPPLY AIR

OPENING

RETURN AIR

OPENING

FIGURE 5

WALL-MOUNTING INSTRUCTIONS

SEE FIGURE 3 – MOUNTING INSTRUCTIONS WALL STRUCTURE

FACTORY SUPPLIED RAIN

FLASHING. MOUNT ON UNIT

BEFORE INSTALLATION

SUPPLY AIR

OPENING

SUPPLY

AIR DUCT

RETURN AIR

OPENING

RETURN

AIR DUCT

MIS-549

Manual 2100-385B

Page 10

FRAMING MATERIAL

2 x 4'S, 2 x 6'S &/OR

STRUCTURAL STEEL

BOTTOM MOUNTING

BRACKET. MOUNT ON WALL

BEFORE INSTALLING UNIT.

MIS-548

FIGURE 6

WALL-MOUNTING INSTRUCTIONS

SEE UNIT DIMENSIONS FIGURE 1

FOR ACTUAL DIMENSIONS

ATTACH TO TOP

PLATE OF WALL

E + 1.000

B

1.000" CLEARANCE

ALL AROUND

INTERIOR FINISHED

WALL OVER FRAME

1.000" CLEARANCE

ALL AROUND

EXTERIOR FINISHED

WALL OVER FRAME

SUPPLY DUCT

OPENING

1.000

A

I

RETURN DUCT

OPENING

C

K

2 x 6

ATTACH TO BOTTOM

PLATE OF WALL

THIS STRUCTURAL MEMBER LOCATED TO

MATCH STUD SPACING FOR REST OF WALL.

A SECOND MEMBER MAY BE REQUIRED FOR

SOME WALLS.

RAIN

FLASHING

FIGURE 7

COMMON WALL-MOUNTING INSTALLATIONS

RAFTERS

SUPPLY AIR DUCT

W / GRILLE

FINISHED CEILING SURFACE

RETURN AIR OPENING

W / GRILLE

SUPPLY DUCT MAY BE LOCATED IN

AN ATTIC OR BELOW CEILING

RAFTERS AS SHOWN

RAIN

FLASHING

RAFTERS

SUPPLY AIR DUCT

FINISHED CEILING SURFACE

RETURN AIR OPENING

W / GRILLE

OUTSIDE

WALL

OUTSIDE

WALL

SUPPLY DUCT MAY BE LOCATED IN AN ATTIC

OR BELOW CEILING RAFTERS AS SHOWN

RAIN

FLASHING

RAFTERS

SUPPLY AIR DUCT

FINISHED CEILING SURFACE

RETURN AIR SPACE

WALL SLEEVE

FALSE WALL

RETURN AIR GRILLE

OUTSIDE

WALL

SUPPLY DUCT MAY BE LOCATED IN

AN ATTIC OR BELOW CEILING RAFTERS

AS SHOWN

RAIN

FLASHING

OUTSIDE

WALL

RAFTERS

SUPPLY AIR DUCT

LOWERED

CEILING

SUPPLY AIR

GRILLE

CLOSET WALL

FINISHED CEILING

SURFACE

WALL SLEEVE

RAISED FLOOR

RETURN AIR RETURN AIR GRILLE

MIS-550

Manual 2100-385B

Page 11

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” or “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 insure that there will be no nuisance tripping due to the momentary high starting current of the compressor motor.

The disconnect access door on this unit may be locked to prevent unauthorized access to the disconnect. To convert for the locking capability, bend the tab, located in the bottom left hand corner of the disconnect opening under the disconnect access panel, straight out. This tab will now line up with the slot in the door. When shut, a padlock may be placed through the hole in the tab preventing entry.

WIRING — LOW VOLTAGE WIRING

230/208V – 1 phase and 3 phase equipment 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 240V and 208V taps are:

TAP

240

208

RANGE

253 – 216

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).

Five (5) wires should be run from thermostat subbase to the 24V terminal board in the unit. A five conductor, 18 gauge copper, color-coded thermostat cable is recommended. The connection points are shown in

Figure 8.

T r a n s f o r m e r

V A

5 5

TABLE 3

THERMOSTAT WIRE SIZE

F L A

2 .

3

W i r e G a u g e

2 0

1 8

1 6

1 4

1 2

G a u g e

G a u g e

G a u g e

G a u g e

G a u g e

M a x i m u m

D i s t a n c e i n

F e e t

4 5

6 0

1 0 0

1 6 0

2 5 0

TABLE 4

WALL THERMOSTAT AND SUBBASE

COMBINATIONS

T h e r m o s t a t

8 4 0 3 0 0 2

T 8 7 F 3 1 1 1

S u b b a s e P r e d o m i n a t e F e a t u r e s

8 4 0 4 0 0 3

Q 5 3 9 A 1 2 2 0

1 s t a g e h e a t , 1 s t a g e

S y s t e m : h e a t o f f c o o l c o o l

F a n : a u t o o n

8 4 0 3 0 4 1

T 8 0 3 4 C

8 4 0 3 0 1 9

T 8 7 4 C 1 7 6 0

8 4 0 3 0 2 1

T 8 7 4 D 1 9 3 4

8 4 0 3 0 3 5

1 F 9 5 8 0

8 4 0 3 0 4 3

C M 2 0 0

-

8 4 0 4 0 1 2

Q 6 7 4 A 1 0 0 1

1 s t a g e c o o l , 2 s t a g e h

S y s t e m : h e a t a u t o c o o l e a

F t a n : a u t o o n

8 4 0 4 0 1 2

Q 6 7 4 A 1 0 0 1

2 s t a g e c o o l , 2 s t a g e h

S y s t e m : h e a t a u t o c o o l e a t

F a n : a u t o o n

-

-

-

-

-

1 s t a g e h e a t , 1 s t a g e

S y s t e m : h e a t o f f c o o l c o o l

F a n : a u t o o n

2 s t a g e c o o l , 2

E l e c t r o n i c 7 s t a g e h e a t d a y p r o g r a m m i n g

1 s t a g e h e a t , 1 s t a g e

S y s t e m : h e a t o f f c o o l c o o l

F a n : a u t o o n

Manual 2100-385B

Page 12

FIGURE 8

LOW VOLTAGE WIRING DIAGRAM

MIS-1373

Manual 2100-385B

Page 13

START UP

IMPORTANT INSTALLER NOTE

For improved start-up performance, wash the indoor coil with a dish washing detergent.

HIGH PRESSURE SWITCH

The WE482, WE602 and WE701 models are supplied with a remote reset high pressure switch. If tripped, this pressure switch may be reset by turning the thermostat off then back on again.

CONDENSER FAN OPERATION

The condenser fan motor on 230/208 volt, one and three phase 50 Hz models must have fan motor wired on low speed. These models are factory wired on low speed.

SERVICE HINTS

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

2. Switching to heating cycle at 75° F or higher outside temperature may cause a nuisance trip of the remote reset high pressure switch. Turn thermostat off then on to reset the high pressure 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.

SEQUENCE OF OPERATION

COOLING – 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 all 230 volt units there is a one minute off delay on the blower motor. 460 volt models do not have an off delay.

HEATING – Circuit R-W1 make at the thermostat pulling in heat contact for the strip heat and blower operation. On a call for second stage heat, R-W2 makes bringing on second heat contactor, if so equipped.

COMPRESSOR CONTROL MODULE

The compressor control module is standard on all 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 timer 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 (OPTIONAL)

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 than 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 unit model. The lockout features, both soft and manual, are a function of the

Compressor Control Module.

Manual 2100-385B

Page 14

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 on Make (DOM) timing on power-up and after power interruptions is equal to 2 minutes plus 10% of Delay on 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 no delay.

Typical Settings for Dual Unit Installation:

Unit 1: DOB set at 2 minutes, and DOM is 132 seconds

Unit 2: DOB set at 4 minutes, and DOM is 144 seconds

PHASE MONITOR

All units with three phase compressors are equipped with a 3 phase line monitor to prevent compressor damage due to phase reversal.

The phase monitor in this unit is equipped with two

LEDs. If the Y signal is present at the phase monitor and phases are correct the green LED will light.

If phases are reversed, the red fault LED will be lit and compressor operation is inhibited.

If a fault condition occurs, reverse two of the supply leads to the unit. Do not reverse any of the unit factory wires as damage may occur.

PRESSURE SERVICE PORTS

Liquid and suction pressure service ports are installed on all units so that the system operating pressures can be observed. Pressure tables can be found later in the manual covering all models. It is imperative to match the correct pressure table to the unit by model number.

Manual 2100-385B

Page 15

TROUBLESHOOTING

FAN BLADE SETTING DIMENSIONS

Shown in Figure 9 is the proper method to measure the fan blade location.

Any service work requiring removal or adjustment in the fan and/or motor area will require that the fan blade location be checked.

FIGURE 9

FAN BLADE SETTING

REFRIGERANT CHARGE

The system is charged with R-407C. The correct quantity is shown on the unit rating plate. Optimum unit performance will occur with a refrigerant charge resulting in a suction line temperature (6 inches from compressor) as shown in Table 6.

The suction line temperatures shown in Table 6 are based upon 80°F dry bulb / 67°F wet bulb (50 percent

R.H.) temperature and rated airflow across the evaporator coil during cooling cycle.

See page 20 for instructions in servicing units which contain refrigerant R-407C

TABLE 5

FAN BLADE DIMENSIONS

M o d e l

W E 2 5 2

W E

W E

3 0 1

3 7 1

W E

W E

4 2 1

4 8 2

W E 6 0 2

W E 7 0 1

D i m e n s i o n A

1 .

0

1 .

2 5

1 .

7 5

1 .

2 5

REMOVAL OF FAN SHROUD

1. Disconnect all power to unit.

2. Remove the screws holding both grilles – one on each side of unit – and remove grilles.

3. Remove screws holding fan shroud to condenser and bottom – 9 screws.

4. Unwire condenser fan motor.

5. Slide complete motor, fan blade, and shroud assembly out the left side of the unit.

6. Service motor/fan as needed.

7. Reverse steps to reinstall.

TABLE 6

SUCTION LINE TEMPERATURES

M o d e l

W E 2 5 2

W E 3 0 1

W E 3 7 1

W E 4 2 1

W E 4 8 2

W E 6 0 2

W E 7 0 1

R a t e d

A i r f l o w

6 7 5

9 5 0

1 0 0 0

1 1 5 0

1 2 7 5

1 4 0 0

1 4 8 5

9 5 o

O D T e

F m p .

5 8 6 0

6 4 6 6

5 7 5 9

5 5 5 7

5 7 5 9

5 6 5 8

6 1 6 3

8 2 o

O D T e

F m p .

6 5 6 7

6 6 6 8

5 8 6 0

6 8 7 0

6 9 7 1

6 3 6 5

6 0 6 2

M o d e l

W E 2 5 2

W E 3 0 1

W E 3 7 1

W E 4 2 1

W E 4 8 2

W E 6 0 2

W E 7 0 1

TABLE 7

RATED CFM and ESP

R a t e d

C F M

6 7 5

9 5 0

1 0 0 0

1 1 6 5

1 2 7 5

1 4 0 0

1 4 8 5

R

E a t e d

S P

.

2 2

.

2 2

.

2 0

.

3 0

.

2 0

.

3 0

.

2 0

R e c o m m e n d

A i r f l o w R a n e d g e

6 1 0 7 5 0

8 5 5 1 0 4 5

9 0 0 1 1 0 0

1 0 5 0 1 2 8 0

1 1 5 0 1 4 0 0

1 2 6 0 1 5 4 0

1 3 4 0 1 6 3 0

RATED CFM AND RATED ESP WITH BLOWER

SET ON HIGH SPEED.

Manual 2100-385B

Page 16

E S P i n

I n c h e s

H 2 O

( P a )

.

0 0

( 0 )

.

1 0

( 2 5 )

.

2 0

( 5 0 )

.

3 0

( 7 5 )

.

4 0

( 1 0 0 )

W E 2 5

D r y /

W e t C o li

8 0 0

( 0 .

3 8 /

/ 8 4 5

0 .

4 0 )

8 3 0

( 0 .

3 9 /

/ 7 8 0

0 .

3 7 )

7 8 0

( 0 .

3 7 /

/ 7 2 0

0 .

3 4 )

7 1 0

( 0 .

3 3 /

/ 6 4 0

0 .

3 0 )

6 4 0

( 0 .

3 0 /

/ 5 6 0

0 .

2 6 )

TABLE 8

INDOOR BLOWER PERFORMANCE

CFM (m 3 /s) at 220V

H i g h S

W E 3 0 , W E 3 7 p e e d L o w S p e e d

D r y /

W e t C o li

1 1 6 0

( 0 .

5 5 /

/ 1 0 9 5

0 .

5 2 )

1 1 1 5

( 0 .

5 3 /

/ 1 0 6 0

0 .

5 0 )

1 0 7 0

( 0 .

5 0 /

/ 1 0 0 0

0 .

4 7 )

(

1 0 0 0

0 .

4 7 /

/ 9 1 5

0 .

4 3 )

9 2 5

( 0 .

4 4 /

/ 8 3 0

0 .

3 9 )

D r y /

W e t C o li

7 9 0

( 0 .

3 7 /

/ 7 8 0

0 .

3 7 )

7 7 5

( 0 .

3 6 /

/ 7 6 0

0 .

3 5 )

7 6 0

( 0 .

3 5 /

/ 7 4 0

0 .

3 5 )

/ -

/ -

H i g h S

W E 4 2 , W E 4 8 p e e d L o w S p e e d

D r y /

W e t C o li

1 5 6 5

( 0 .

7 4 /

/ 1 5 0 0

0 .

7 1 )

1 4 7 0

( 0 .

6 9 /

1 3 8 0

0 .

6 5 )

1 3 6 0

( 0 .

6 4 /

/ 1 2 8 5

0 .

6 1 )

1 2 5 0

( 0 .

5 9 /

/ 1 1 6 0

0 .

5 5 )

1 1 4 0

( 0 .

5 4 /

/ 1 0 6 5

0 .

5 0 )

D r y /

W e t C o li

1 3 7 0

( 0 .

6 5 /

/ 1 3 3 0

0 .

6 3 )

1 2 8 5

( 0 .

6 1 /

/ 1 2 4 0

0 .

5 9 )

1 2 0 0

( 0 .

5 7 /

/ 1 1 6 0

0 .

5 5 )

1 1 2 0

( 0 .

5 3 /

/ 1 0 8 0

0 .

5 1 )

/ -

W E 6 0 , W E 7 0

H i g h S p e e d L o w S p e e d

D r y

W

/ e t C o

1 8 2 5

( 0 .

8 6 /

/ 1 6 6 0

0 .

7 8 )

1 7 4 0

( 0 .

8 2

/

/

1 5 7 0

0 .

7 4

(

1 6 6 0

0 .

7 8 /

/ 1 0 0

0 .

7 1 )

1 5 5 0

( 0 .

7 3 /

/ 1 4 0 0

0 .

6 6 )

1 4 7 0

( 0 .

6 9 /

/ 1 3 3 0

0 .

6 3 ) li

D r y /

W e t C o li

1 3 3 0

( 0 .

6 3 /

/ 1 2 0 0

0 .

5 7 )

Above data is with 1-inch (25mm) standard disposable filter and 1-inch (25mm) washable filter.

For optional 2-inch (51mm) pleated filter reduce ESP by .15 inches (37.33 Pa).

/ -

/ -

/ -

/ -

M O D E L

W E

W E

2

2

5

5

2

2

-

-

D

D

0

0

5

8

W E 2 5 2 F 0 5

W E

W E

3 0 1 ,

3 0 1 ,

W E 3 0 1 ,

W E 3 0 1 ,

W E

W E

3 7 1 D 0 5

3 7 1 D 1 0

W E

W E

3 7 1 F 0 7

3 7 1 F 1 2

W E 4 2 1 ,

W E 6 0 2 ,

W E

W E

4 8 2 F 0 7

7 0 1 F 0 7

W E 4 2 1 ,

W E 6 0 2 ,

W E 4 8 2 F 1 2

W E 7 0 1 F 1 2

TABLE 9

MAXIMUM ESP OF OPERATION

ELECTRIC HEAT ONLY

H I G H S P

E S P

E E D

.

4 0

.

4 0

.

4 0

.

4 0

.

4 0

.

4 0

.

3 5

.

4 0

.

4 0

.

4 0

.

4 0

L O W S P

E S P

E E D

-

-

-

.

4 0

.

3 5

.

3 0

.

2 5

.

4 0

.

4 0

.

4 0

.

4 0

Manual 2100-385B

Page 17

TABLE 10

PRESSURE TABLE

AIR TEMPERATURE ENTERING OUTDOOR COIL COOLING

M

W

W

W

W

W

W o

E

E

E

E

E

E d

2

3

3

4

4

6 e

5

0

7

2

8

0 l

2

1

1

1

2

2

7 5 °

6 2 °

D B

W B

8 0 °

6 7 °

D B

W B

8 5 °

7 2 °

D B

W B

7 5 °

6 2 °

D B

W B

8 0 °

6 7 °

D B

W B

8 5 °

7 2 °

D B

W B

7 5 °

6 2 °

D B

W B

8 0 °

6 7 °

D B

W B

8 5 °

7 2 °

D B

W B

7 5 ° D B

6 2 ° W B

8 0 °

6 7 °

D B

W B

8 5 °

7 2 °

D B

W B

R e t u r n A i r

T e m p e r a t u r e

7 5 °

6 2 °

D B

W B

8 0 ° D B

6 7 ° W B

8 5 °

7 2 °

D B

W B

7 5 ° D B

6 2 ° W B

8 0 °

6 7 °

D B

W B

8 5 °

7 2 °

D B

W B

P r e s s u r e

L o w S i d e

H i g h S i d e

L o w S i d e

H i g h S i d e

L o w S i d e

H i g h S i d e

L o w S i d e

H i g h S i d e

L o w S i d e

H i g h S i d e

L o w

H i g h

L

H

L

H

L

H

L

H i

L

H i

L

H

L

H

L

H i

L

H i

L

H i

L

H i

L

H i i i i i i o o o o w o w o o o w o w o w o w o g g g g h g h g w g g h g h g h g h w g w h w h w h w h h h

S i d e

S i d e

S

S

S

S

S

S

S i

S i

S i

S i

S

S

S

S

S i

S i

S i

S i

S i

S i

S i

S i

S

S i i i i i i i i i i i i d d d d d d d e d e d e d e d d d d d e d e d e d e d e d e d e d e d d e e e e e e e e e e e e

7 5 °

6 8

2 2 9

7 3

2 3 5

7 6

2 4 3

8 0 °

7 2

2 4 7

7 7

2 5 3

8 0

2 6 2

7 8

2 2 7

8 3

2 3 3

8 6

2 4 1

2

2

2

2

2

2

2

2

2

2

2

2

7

2 4

8

3 0

8

3

7

3

8

4

8

4

8

2

8

3 4

9

4 2

8

8

8

8

5

3

1

6

9

3

8

9

2

1

5 2

8 7

5 8

9

6

9

5

0

7

2

2

2

2

2

2

2

2

2

2

2

2

7

4

8

5

8

6

8

8

9

5

8

8

8

6

8

7

8

7

9

9

5

5

1

8

0

1

4 1

7

4 7

0

6

0

5 1

6

5 7

9

6

2 5 5

2 6 4

2

8

4 9

9 1

9 4

8

5

3

0

9

7

2

7

8 5 °

7 5

2 6 4

8 0

2 7 1

8 3

2 8 0

9 0 °

7 8

2 8 3

8 3

2 9 0

8 6

3 0 0

9 5 °

7 9

3 0 2

8 5

3 1 0

8 8

3 2 1

1 0 0 °

8 1

3 2 3

8 7

3 3 1

9 0

3 4 3

1 0 5 °

8 2

3 4 3

8 8

3 5 2

9 1

3 6 4

1 1 0 °

8 3

3 6 5

8 9

3 7 4

9 2

3 8 7

1 1 5 °

8 4

3 8 7

9 0

3 9 7

9 3

4 1 1

2

2

2

2

2

2

2

2

2

2

2

2

3

8

6 2

8

6 9

9

7

8

1

7

0

8

5 8

8

6 5

9

7

8

6 7

8

7 4

9

8

8

8

9

9

0

2

8

1

4

3

9

2

4

6

6 9

9 2

2 7 6

9 5

2 8 6

4

9 0

0

9 7

3

7

8 3

2 8 0

8 9

2 8 7

9 2

2 9 7

2

2

2

2

2

3

2

2

3

3

3

3

8

7 7

9

8 4

9

9

8

9

9

0

8

8

9

9 6

9

0 6

8

9

9

2

4

0

3

4

5

8 4

1

9 1

4

1

8

9

4

7

5

0 9

1

1 7

4

8

2

3

3

3

3

3

3 2 9

3 3 7

3

8

9

9

0

9

1

9

1 4

8 8

9 4

9

8

9

5

9

1

7

4

8

8 5

2 9 5

9 1

3 0 3

4

3 0 1

3 0 9

7

2 0

9

0 8

9 5

3 1 6

9 8

3 2 7

8 6

9 2

5

4 9

3

3

3

3 1 5

3 2 3

3

3 1 9

3 2 7

3

3

3 3 6

1 0 0

3 4 8

3 4 9

3 5 8

3

8

9

9

3

9

3 4

9 0

9 6

9

3 8

9

2 8

9 7

8 7

9 3

9

6

1 8

2

2 6

5

7

8 7

9 3

6

9

1

6

7 1

8 8

3 3 8

9 4

3 4 7

9 7

3 5 9

3

3

3

3

3

1

3

3

3 5 7

1 0 1

3 6 9

3 7 0

3 7 9

3

8

9

8

3 5

9 4

4 4

9

5

9

3

9

4

0

5

9

7

6

3

6

9

5

2

7

2

4 8

9 8

8 8

9 4

7

9 2

3

3

3

8

5

9

6

9

8

9

9

5

8

8

1

9 6

3 7 3

1 0 3

3 8 3

1 0 7

3 9 6

9 1

3 7 8

9 7

3 8 8

1 0 0

4 0 2

9 0

4 1 1

9 6

4 2 2

9 9

4 3 7

9 4

3 8 6

1 0 1

3 9 6

1 0 5

4 1 0

9 4

3 5 5

1 0 1

3 6 4

1 0 5

3 7 7

9 0

3 5 7

9 6

3 6 6

9 9

3 7 9

8 9

3 9 0

9 5

4 0 0

9 8

4 1 4

9 4

3 6 8

1 0 0

3 7 7

1 0 4

3 9 0

W E 7 0 1

7 5 °

6 2 °

D B

W B

8 0 °

6 7 °

D B

W B

L

H

L

H i i o o w g g h w h

S

S

S

S i i i i d d d d e e e e

2

2

6

3

7

3

8

1

3

7

2

2

7

4

7

5

0

8

5

4

2

2

7

6

7

7

2

5

7

2

2

2

7

8

7

9

4

3

9

0

3

3

7

0

8

0

6

1

1

9

3

3

7

2

8

2

7

1

2

9

3

3

7

4

8

4

9

0

4

9

3

3

7

6

8

7

9

2

5

1

8 5 °

7 2 °

D B

W B

L

H i o w g h

S

S i i d d e e 2

7

4

6

5 2

7

6

8

3 2

8

8

0

2 3

8

0

2

0 3

8

2

4

0 3

8

4

5

1 3

8

6

7

1 3

8 8

8 4

Low Side pressure ± 2 PSIG

High Side pressure ± 5 PSIG

Tables are based upon rated CFM (airflow) across the evaporator coil. If there is any doubt as to correct operating charge being in the system, the charge should be removed, system evacuated and recharge to serial plate instructions.

Manual 2100-385B

Page 18

8 1

3 8 2

8 7

3 9 2

9 0

4 0 6

9 0

3 7 9

9 6

3 8 9

9 9

4 0 3

TABLE 11

OPTIONAL ACCESSORIES

P a r t N u m b e r

B O P

B O P

2

3

B O P 5

B F A D 2

B F A D 3

B F A D 5

M F A D 2

M F A D 3

M F A D 5

C R V 2

C R V 3

C R V 5

E I F M 2

E I F M 3

E I F M 5

E H W A 0 2 A 0 5

E H W A 0 2 A A 0 8

E H W H 2 4 B C 0 6

D e s c r i p t i o n

B l a n k

B l a n k

B l a n k

O

O

O ff ff ff

P l a t e

P l a t e

P l a t e

B a r o m e t

B a r o m e t

B a r o m e t ir c ir c ir c

F r e s h

F r

F r e s h e s h

A i r

A i r

A i r

D a m p e r

D a m p e r

D a m p e r

M o t o

M o t o

M o t o ir z e d ir z e d ir z e d

F

F r e s h r e s h

F r e s h

A i

A i r r

A i r

D a m p e r

D a m p e r

D a m p e r

C o m m e r c i a l

C o m m e r c i a l

C o m m e r c i a l

R o o m

R o o m

R o o m

V e n t

V e n t

V e n t li a t o r li a t o r li a t o r

E c o n o m i z e r

E c o n o m i z e r

E c o n o m i z e r

W

W

W ti h ti h ti h

E

E x h a u s t x h a u s t

E x h a u s t

H e a t e r P a c k a g e

H e a t e r P a c k a g e

E

E

E

H

H

H

W

W

W

A

A

A

0

0

0

3

3

3

-

-

-

A

A

C

0

1

0

5

0

6

E H W A 0 3 C 1 2

E H W A 0 5 A C 0 9

E H W A 0 5 A F 1 4

H e a t e r P a c k a g e

H e a t e r P a c k a g e

H e a t e r P a c k a g e

H e a t e r P a c k a g e

H

H

H e e e a t a t a t e r e r e r

P

P

P a c a c a c k a g e k a g e k a g e

X

X

X X

X X

X X

X X

X X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

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Manual 2100-385B

Page 19

NOTICE

The refrigeration system in this unit is charged with refrigerant R-407C

SERVICE PROCEDURE AND

CONSIDERATIONS

Refrigerant R-407C is a blend of three refrigerants,

HFC-32 / HFC-125 / HFC134A. Unlike pure fluids and azeotropes, blends boil and condense at varying temperatures for a given pressure. The range over which the temperature varies is referred to as temperature glide. R-407C has moderately high temperature glide between about 9° F and 13° F (5 to

7.2 Celsius) depending upon pressure.

When dealing with blends, pressure temperature tables are presented in an unconventional manner. Two temperatures are listed for the same pressure – the liquid temperature and the vapor temperature.

When a pressure reading is taken from the suction line or discharge line it is converted to temperature from the

“Vapor Temperature” column on the pressure temperature chart.

When a pressure reading is taken at the liquid line it is converted to temperature from the “Liquid

Temperature” column on the pressure temperature chart.

All Bard “WE” models have a pressure tap in the suction line and the liquid line.

See Pressure Temperature Table 12 on page 21.

CHARGING

When charging a system with R-407C, only the liquid phase is to be used to ensure proper refrigerant composition and system performance.

When charging the system into the suction side, care must be exercised to avoid damage to the compressor.

Because the refrigerant leaving the refrigerant cylinder must be in liquid phase, it is suggested that a sight glass be connected between the charging hose and the suction service port. This will permit you to adjust the cylinder hand valve so that liquid can leave the cylinder while allowing vapor to enter the compressor.

The proper refrigerant amount is shown on the unit rating plate.

LEAKS

If a significant leak develops in the system and a noticeable change in the system performance occurs, remove the remaining refrigerant with proper refrigerant recovery methods, repair the leak with proper industry practice and methods, and then, after evacuation, recharge the system with new refrigerant. Again, charge only with liquid refrigerant to ensure that the proper composition is in the system.

CAUTION

Leak checking should never be done with a mixture of R-407C and air. Leak checking can be performed safely with a mixture of

R-407C and nitrogen. Make sure the leak detector is capable of detecting R-407C before using.

Notice:

When opening a system, care must be taken to minimize the system exposure to atmosphere.

Exposure for more than five minutes could shorten the life of the system. The compressor in this system contains Polyol Ester (POE) oil.

POE's are very hygroscopic. They absorb moisture from the atmosphere at a much faster rate than mineral oils used in R-22 systems.

This system has a factory-installed filter drier in the liquid line. It is highly recommended that the filter drier be replaced when the system has been open. Make sure the replacement filter drier is suitable and approved for use with R-407C.

Before recharging the system, a vacuum of 250 microns or less must be achieved.

Manual 2100-385B

Page 20

P r e s s u r e

( P S I G )

8 4

8 6

8 8

9 0

9 2

7 4

7 6

7 8

8 0

8 2

6 4

6 6

6 8

7 0

7 2

5 4

5 6

5 8

6 0

6 2

4 4

4 6

4 8

5 0

5 2

3 4

3 6

3 8

4 0

4 2

2 0

2 2

2 4

2 6

2 8

3 0

3 2

1 1 0

1 1 5

1 2 0

1 2 5

1 3 0

9 4

9 6

9 8

1 0 0

1 0 5

1 3 5

1 4 0

1 4 5

V a p o r

(

T

F ° ) e m p .

4 8 .

1

4 9 .

3

5 0 .

6

5 1 .

8

5 2 .

9

5 4 .

1

5 5 .

2

5 6 .

3

5 7 .

4

5 8 .

5

3 4 .

4

3 5 .

9

3 7 .

4

3 8 .

8

4 0 .

2

4 1 .

6

4 3 .

0

4 4 .

3

4 5 .

6

4 6 .

9

1 7 .

2

1 9 .

2

2 1 .

0

2 2 .

9

2 4 .

7

2 6 .

4

2 8 .

1

2 9 .

7

3 1 .

3

3 2 .

9

1 .

5

4 .

0

6 .

4

8 .

7

1 1 .

0

1 3 .

1

1 5 .

2

5 9 .

6

6 0 .

7

6 1 .

7

6 2 .

7

6 5 .

2

6 7 .

7

7 0 .

0

7 2 .

3

7 4 .

8

7 6 .

7

7 8 .

8

8 0 .

9

8 2 .

9

L i q u i d T e m p .

( F ° )

2 2 .

9

2 4 .

4

2 5 .

9

2 7 .

4

2 8 .

8

3 0 .

2

3 1 .

6

3 3 .

0

3 4 .

3

3 5 .

6

5 .

3

7 .

3

9 .

2

1 1 .

1

1 2 .

9

1 4 .

7

1 6 .

4

1 8 .

1

1 9 .

7

2 1 .

3

1 0 .

7

8 .

2

-

5 .

7

3 .

4

1 .

1

1 .

1

3 .

2

4 8 .

7

4 9 .

8

5 0 .

9

5 1 .

9

5 4 .

5

5 7 .

0

5 9 .

5

6 1 .

8

6 4 .

1

6 6 .

4

3 6 .

9

3 8 .

2

3 9 .

4

4 0 .

6

4 1 .

9

4 3 .

0

4 4 .

2

4 5 .

4

4 6 .

5

4 7 .

6

6 8 .

5

7 0 .

7

7 2 .

8

TABLE 12

R-407C SATURATED VAPOR/LIQUID

TEMPERATURE/PRESSURE CHART

P r e

( P s s u

S I G ) r e

2 8 5

2 9 0

2 9 5

3 0 0

3 0 5

3 1 0

3 1 5

3 2 0

3 2 5

3 3 0

2 3 5

2 4 0

2 4 5

2 5 0

2 5 5

2 6 0

2 6 5

2 7 0

2 7 5

2 8 0

1 8 5

1 9 0

1 9 5

2 0 0

2 0 5

2 1 0

2 1 5

2 2 0

2 2 5

2 3 0

1 5 0

1 5 5

1 6 0

1 6 5

1 7 0

1 7 5

1 8 0

3 3 5

3 4 0

3 4 5

3 5 0

3 5 5

3 6 0

3 6 5

3 7 0

3 7 5

3 8 0

3 8 5

3 9 0

3 9 5

V a p o r

(

T

F ° ) e m p .

1 2 5 .

9

1 2 7 .

1

1 2 8 .

3

1 2 9 .

5

1 3 0 .

7

1 3 1 .

8

1 3 3 .

0

1 3 4 .

1

1 3 5 .

2

1 3 6 .

3

1 1 2 .

8

1 1 4 .

2

1 1 5 .

6

1 1 6 .

9

1 1 8 .

2

1 1 9 .

6

1 2 0 .

9

1 2 2 .

1

1 2 3 .

4

1 2 4 .

7

9 7 .

5

9 9 .

1

1 0 0 .

7

1 0 2 .

3

1 0 3 .

9

1 0 5 .

4

1 0 7 .

0

1 0 8 .

4

1 0 9 .

9

1 1 1 .

4

8 4 .

9

8 6 .

8

8 8 .

7

9 0 .

5

9 2 .

3

9 4 .

0

9 5 .

8

1 3 7 .

4

1 3 8 .

5

1 3 9 .

6

1 4 0 .

6

1 4 1 .

7

1 4 2 .

7

1 4 3 .

7

1 4 4 .

7

1 4 5 .

7

1 4 6 .

7

1 4 7 .

7

1 4 8 .

7

1 4 9 .

6

L i q u i d T e m p .

( F ° )

1 1 7 .

6

1 1 8 .

9

1 2 0 .

2

1 2 1 .

4

1 2 2 .

7

1 2 3 .

9

1 2 5 .

1

1 2 6 .

3

1 2 7 .

5

1 2 8 .

7

1 0 3 .

8

1 0 5 .

3

1 0 6 .

7

1 0 8 .

2

1 0 9 .

6

1 1 1 .

0

1 1 2 .

3

1 1 3 .

7

1 1 5 .

0

1 1 6 .

3

8 7 .

8

8 9 .

6

9 1 .

3

9 2 .

9

9 4 .

6

9 6 .

2

9 7 .

7

9 9 .

3

1 0 0 .

8

1 0 2 .

3

7 4 .

8

7 6 .

8

7 8 .

7

8 0 .

6

8 2 .

5

8 4 .

3

8 6 .

1

1 2 9 .

8

1 3 1 .

0

1 3 2 .

1

1 3 3 .

2

1 3 4 .

3

1 3 5 .

4

1 3 6 .

5

1 3 7 .

6

1 3 8 .

7

1 3 9 .

8

1 4 0 .

8

1 4 1 .

8

1 4 2 .

9

Manual 2100-385B

Page 21