Bryant SINGLE PACKAGED HEAT PUMP UNITS 657A - Manual (Page 26)

c. On all units remove blower assembly from unit. Remove
screws securing blower and slide assembly out. Be
careful not to tear insulation in blower compartment.
d. Ensure proper reassembly by marking blower wheel and
motor in relation to blower housing before disassembly.
e. Loosen setscrew(s) that secures wheel to motor shaft,
remove screws that secure motor mount brackets to
housing, and slide motor and motor mount out of
housing.
2. Lubricate motor as follows:
a. Thoroughly clean all accumulations of dirt or grease
from motor housing.
b. Remove dust caps or plugs from oil ports located at each
end of motor.
c. Use a good grade of SAE 20 non-detergent motor oil and
put one teaspoon (1.16 oz. or 16 to 25 drops) in each oil
port.
d. Allow time for oil to be absorbed by each bearing, then
wipe excess oil from motor housing.
e. Replace dust caps or plugs in oil ports.
3. Remove and clean blower wheel as follows:
a. Ensure proper reassembly by marking wheel orientation.
b. Remove screws holding cut-off plate, and remove plate
from housing.
c. Lift wheel from housing. When handling and/or cleaning
blower wheel, be sure not to disturb balance weights
(clips) on blower wheel vanes.
d. Remove caked-on dirt from wheel and housing with a
brush. Remove lint and/or dirt accumulations from
wheel and housing with vacuum cleaner, using soft
brush attachment. Remove grease and oil with mild
solvent.
e. Reassemble wheel and cut-off plate into housing.
TABLE 13B—SUPERHEAT CHARGING TABLE, UNIT 024–321
TEMP (F)
AIR ENT
COND
EVAP AIR – CFM
750
EVAP AIR – Ewb (F)
56 58 60 62 64 66 68 70 72 74 76
65
SPH
38.0 37.3 37.4 37.5 38.3 37.7 36.8 35.9 35.0 34.3 33.5
70 33.3 32.3 33.2 33.9 36.9 36.0 35.2 34.4 33.4 32.5 31.8
75 24.6 25.6 24.1 25.0 33.3 34.8 33.8 32.6 31.8 31.0 30.2
80 16.4 17.6 21.4 16.8 23.2 31.8 32.2 31.3 30.4 29.5 28.6
85 — — 9.4 8.6 14.7 21.6 29.4 29.8 28.9 27.8 27.0
90 — — — — — 11.6 18.9 26.4 27.3 26.4 25.5
95 — — — — — 3.7 10.8 18.0 24.1 25.0 24.1
100 — — — — — — — 8.0 16.3 22.1 22.6
105 — — — — — — — — 7.2 14.8 20.1
110 — — — — — — — — — 5.2 13.8
115 — — — — — — — — — — 5.1
Ewb-Entering Wet Bulb
SPH-Superheat at Compressor (F)
– -Do not attempt to charge system under these conditions as refrigerant slugging may occur.
TABLE 13C—SUPERHEAT CHARGING TABLE, UNIT 030
TEMP (F)
AIR ENT
COND
EVAP AIR – CFM
1000
EVAP AIR – Ewb (F)
56 58 60 62 64 66 68 70 72 74 76
65
SPH
5.5 5.5 5.5 12.5 19.6 26.6 26.9 27.2 27.5 26.5 25.4
70 — — — 10.5 17.5 24.5 24.8 25.1 25.4 25.1 24.8
75 — — — 8.4 15.5 22.5 22.8 23.1 23.4 23.8 24.2
80 — — — 6.8 12.9 18.9 20.3 21.5 22.9 23.0 23.0
85 — — — 5.1 10.2 15.4 17.7 20.1 22.3 22.1 21.8
90 — — — — 7.9 11.9 15.2 18.5 21.8 21.5 21.2
95 — — — — 5.6 8.4 12.7 17.0 21.2 20.8 20.6
100 — — — — — — 9.2 14.1 191 19.5 19.9
105 — — — — — — 5.7 11.4 17.1 18.2 19.3
110 — — — — — — 5.0 10.0 15.1 16.9 18.6
115 — — — — — — — 8.7 13.0 15.5 18.0
Ewb-Entering Wet Bulb
SPH-Superheat at Compressor (F)
– -Do not attempt to charge system under these conditions as refrigerant slugging may occur.
TABLE 13D—SUPERHEAT CHARGING TABLE, UNIT 036
TEMP (F)
AIR ENT
COND
EVAP AIR – CFM
1150
EVAP AIR – Ewb (F)
56 58 60 62 64 66 68 70 72 74 76
65
SPH
28.6 28.6 30.4 32.1 33.3 34.3 33.4 32.0 30.7 29.8 28.9
70 23.8 23.8 25.5 27.2 29.5 32.3 32.0 30.9 29.7 28.6 27.6
75 19.0 19.1 20.6 22.2 25.7 30.4 30.6 29.7 28.7 27.5 26.3
80 15.0 15.0 15.8 16.5 21.1 26.5 27.7 27.8 27.8 26.6 25.3
85 10.9 10.9 10.9 10.9 16.6 22.6 24.8 25.9 26.9 25.6 24.3
90 7.7 7.7 7.0 8.3 12.6 19.1 21.5 23.4 25.3 24.4 23.6
95 — — — — 8.6 14.5 16.5 20.9 23.6 23.3 22.9
100 — — — — — 11.3 14.3 17.4 20.4 21.1 21.8
105 — — — — — 7.1 10.5 13.9 17.2 19.0 20.8
110 — — — — — — 7.1 11.7 16.4 18.2 19.9
115 — — — — — — — 9.6 15.5 17.3 19.1
Ewb-Entering Wet Bulb
SPH-Superheat at Compressor (F)
– -Do not attempt to charge system under these conditions as refrigerant slugging may occur.
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