Bryant SINGLE PACKAGED HEAT PUMP UNITS 657A - Manual (Page 24)

1. Inspect air filter(s) each month. Clean or replace when
necessary.
2. Inspect indoor coil, drain pan, and condensate drain at least
each cooling season for cleanliness. Clean when necessary.
3. Inspect blower motor and wheel for cleanliness and check
lubrication each heating and cooling season. Clean when
necessary.
4. Check electrical connections for tightness and controls for
proper operation each heating and cooling season. Service
when necessary.
5. Ensure electric wires are not in contact with refrigerant
tubing or sharp metal edges.
A. AIR FILTER
CAUTION: Never operate the unit without a suitable air
filter in the return-air duct system. Always replace the
filter with the same size as originally installed. See Table
1 for recommended filter sizes.
Inspect air filter(s) at least once each month and replace
(throwaway-type) or clean (cleanable-type) at least twice during
each heating and cooling season or whenever the filter(s) becomes
clogged with dust and lint.
B. UNIT TOP REMOVAL
NOTE: When performing maintenance or service procedures that
require removal of the unit top, be sure to perform all of the routine
maintenance procedures that require top removal, including coil
inspection and cleaning, and condensate drain pan inspection and
cleaning.
Only qualified service personnel should perform maintenance and
service procedures that require unit top removal. Refer to the
following top removal procedures:
1. Remove 7 screws on unit top cover surface. (Save all
screws.)
2. Remove 4 screws on unit top cover flange. (Save all
screws.)
3. Lift top from unit carefully. Set top on edge and make sure
that top is supported by unit side that is opposite duct (or
plenum) side.
4. Carefully replace and secure unit top to unit, using screws
removed in Steps 1 and 2, when maintenance and/or service
procedures are completed.
C. INDOOR BLOWER AND MOTOR
NOTE: Motors without oilers are prelubricated. Do not attempt to
lubricate these motors.
For longer life, operating economy, and continuing efficiency,
clean accumulated dirt and grease from the blower wheel and
motor annually.
Lubricate the motor every 5 years if the motor is used intermit-
tently (thermostat FAN switch in AUTO. position), or every 2
years if the motor is used continuously (thermostat FAN switch in
ON position).
TABLE 8—DRY COIL AIR DELIVERY (DEDUCT 10 PERCENT FOR 208V)*
HORIZONTAL AND DOWNFLOW DISCHARGE
UNIT 657A024-042
230 AND 460 VOLT
Unit
Motor
Speed
External Static Pressure (in. wg)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
024 & 030
Low
Watts 280 275 265 255 250 245 240 — — — —
Cfm 820 810 755 700 660 600 560 — — — —
Med
Watts 365 360 350 345 340 330 320 310 300 — —
Cfm 1025 1010 975 940 900 850 800 720 630 — —
High
Watts — — 490 480 470 460 445 430 410 390 380
Cfm — — 1300 1255 1200 1150 1080 1005 915 790 620
036
Low
Watts 520 495 474 458 445 425 — — — — —
Cfm 1375 1335 1290 1240 1200 1140 — — — — —
Med
Watts 575 560 535 510 480 460 440 425 — — —
Cfm 1520 1490 1450 1400 1380 1300 1200 1080 — — —
High
Watts — — — — 650 614 575 540 510 480 —
Cfm — — — — 1560 1500 1380 1280 1170 1060 —
042
Low
Watts 490 480 470 460 450 430 410 390 — — —
Cfm 1400 1380 1340 1300 1250 1200 1140 1070 — — —
Med
Watts 590 580 560 545 525 505 480 450 420 — —
Cfm 1600 1560 1540 1470 1430 1360 1300 1220 1120 — —
High
Watts — — — — — 700 670 640 600 560 500
Cfm — — — — — 1780 1670 1600 1480 1340 1100
* Air delivery values are based on operating voltage of 230-v dry coil, without filter or electric heater. Deduct wet coil, filter and electric heater pressure drops to obtain static
pressure available for ducting.
NOTES:
1. Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity. Indoor coil frosting may occur at airflows below this
point.
2. Dashes indicate portions of table that are beyond the blower motor capacity or are not recommended.
TABLE 9—048 & 060 ECM AIRFLOW (CFM)
UNIT 657A
FAN ONLY
(CFM)
COOLING
(CFM)
048 1400 1600
060 1750 2000
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