Bryant SINGLE PACKAGED HEAT PUMP UNITS 657A User Manual
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
20
1/4 (1100)
2200
20
1/4 (1100)
2200
20
1/4 (1100)
2400
20
1/4 (1100)
2400
20
1/3 (1100)
2400
20
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
3
800
10x9
1/4 (1075)
PSC
3
1000
10x9
1/4 (1075)
PSC
3
1300
10x9
1/2 (1100)
PSC
3
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
5"
[127]
19-
1/2
"
[495]
NOTES:
1.
Do not drill more than 1/2-in into shaded area.
2.
Dimensions in [ ] are in mm.
—12—