Bryant SINGLE PACKAGED HEAT PUMP UNITS 657A User Manual download pdf (Page 12)

WARNING: Before performing service or maintenance

operations on the system, turn off main power to unit and

install lockout tag or electrical shock could result.

1. Open all electrical disconnects and install lockout tag before

starting any service work.

2. Remove indoor coil access panel (See Fig. 12).

3. Locate lances in unit base insulation that are placed over the

perimeter of the vertical duct opening cover (See Fig. 13).

4. Using a straight edge and sharp knife, cut and remove the

insulation around the perimeter of the cover. Remove the

screws securing the cover to the unit base and slide out the

cover. Discard the cover.

5. Remove indoor blower access panel (See Fig. 14).

6. Disconnect indoor-fan motor leads from indoor fan relay

and unit contactor (See Fig. 15). Carefully disengage wire

tie containing indoor-fan motor leads from the unit control

box (See Fig. 15 & 17).

7. Remove screws securing indoor blower housing to blower

shelf and carefully slide out blower housing. There is a filler

bracket attached to the blower shelf; remove this filler

bracket and retain for later use (See Fig. 16).

8. Locate lances in unit base insulation that are placed over the

perimeter of the vertical discharge opening cover (See Fig.

13).

9. Using a straight edge and sharp knife, cut the insulation

around the perimeter of the cover. Remove the screws

TABLE 1—PHYSICAL DATA—UNIT 657A

UNIT SIZE 024 030 036 042 048 060

NOMINAL CAPACITY (ton) 2 2-1/2 3 3-1/2 4 5

OPERATING WEIGHT (lb.)

Without Base Rails

WIth Optional Rails

309

296

340

327

368

355

368

355

411

398

425

412

COMPRESSOR Scroll

REFRIGERANT (R-22)

Quantity (lb.)

5.4 5.6 8.6 6.8 7.9 8.1

REFRIGERANT METERING DEVICE Acutrol™ System

OUTDOOR COIL

Rows...Fins/in.

Face Area (sq. ft.)

2...17

7.0

2...17

7.0

2...17

8.7

2...17

8.7

2...17

8.7

2...17

8.7

OUTDOOR FAN

Nominal Cfm

Diameter (in.)

Motor Hp (Rpm)

2200

1/4 (1100)

2200

1/4 (1100)

2200

1/4 (1100)

2400

1/4 (1100)

2400

1/3 (1100)

2400

1/3 (1050)

INDOOR COIL

Rows...Fins/in.

Face Area (sq. ft.)

3...15

3.6

3...15

3.6

4...15

4.5

4...15

4.5

4...15

4.5

4...15

4.5

INDOOR BLOWER

Motor Type

Speeds

Nominal Airflow (Cfm)

Size (in.)

Motor Hp (RPM)

PSC

800

10x9

1/4 (1075)

PSC

1000

10x9

1/4 (1075)

PSC

1300

10x9

1/2 (1100)

PSC

1400

10x9

1/2 (1100)

ECM

Variable

1550

10x10

1.0 (Variable)

ECM

Variable

1800

10x10

1.0 (Variable)

RETURN-AIR FILTERS (in.)

Throwaway

24x24x1 24x24x1 24x30x1 24x30x1 24x30x1 24x30x1

ECM-Electronic Computated Motor.

Fig. 19—Area Not To Be Drilled

C95012

[127]

19-1/2"

[495]

NOTES:

Do not drill more than 1/2-in into shaded area.

Dimensions in [ ] are in mm.

—12—

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 31 32

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Bryant SINGLE PACKAGED HEAT PUMP UNITS 657A User Manual Page 12

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