Bryant 657A, Installation, Start-Up, And Operating Instructions Manual

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WARNING:
Disconnect and tag electrical power to the
unit before cleaning the blower motor and wheel. Failure
to adhere to this warning could cause personal injury or
death.
To clean the blower motor and wheel:
1. Remove and disassemble blower assembly as follows:
a. Remove unit access panel.
b. For PSC Blower Motors Disconnect motor lead from
indoor fan relay (IFR). Disconnect yellow lead from
terminal L2 of the contactor.
TABLE 10—WET COIL PRESSURE DROP
UNIT SIZE
AIRFLOW
(CFM)
PRESSURE DROP
(IN. WG)
024
600 0.039
700 0.058
800 0.075
900 0.088
030
900 0.088
1000 0.095
1200 0.123
036
1000 0.068
1200 0.088
1400 0.108
1600 0.123
042
1000 0.048
1200 0.069
1400 0.088
1600 0.102
048
1400 0.068
1550 0.073
1600 0.075
1800 0.088
060
1700 0.082
1900 0.095
2100 0.108
2300 0.123
TABLE 11—ACCESSORY ELECTRIC HEATER PRESSURE DROP (IN. WG)
HEATER
KW
CFM
600 800 1000 1200 1400 1600 1800 2000 2200
5–20 0.030 0.033 0.037 0.042 0.047 0.052 0.060 0.067 0.075
TABLE 12—FILTER PRESSURE DROP (IN. WG)
UNIT SIZE
FILTER
SIZE
(IN.)
500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
024–036 24 x 24 x 1 — — 0.06 0.06 0.07 0.07 0.08 0.09 0.10 — — — — — — — — — —
042–060 24 x 30 x 1 — — — — — — — — 0.08 0.09 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.17 0.18
TABLE 13A—SUPERHEAT CHARGING TABLE, UNIT 024–311
TEMP (F)
AIR ENT
COND
EVAP AIR – CFM
800
EVAP AIR – Ewb (F)
56 58 60 62 64 66 68 70 72 74 76
65
SPH
— — 24.0 27.4 30.8 31.1 31.5 30.5 29.5 29.2 28.9
70 — — 19.5 24.4 29.3 29.9 30.4 29.5 28.6 28.2 27.8
75 — — 15.0 21.4 27.8 28.6 29.4 28.5 27.7 27.2 26.7
80 — — 7.5 14.4 21.4 24.5 27.6 27.1 26.5 26.1 25.6
85 — — — 7.5 15.0 20.4 25.8 25.6 25.4 24.9 24.5
90 — — — — 7.5 14.0 20.4 22.3 24.2 23.8 23.4
95 — — — — — 7.5 15.0 19.0 23.1 22.7 22.3
100 — — — — — — 7.5 13.5 19.5 20.3 21.1
105 — — — — — — — 8.0 16.0 18.0 20.0
110 — — — — — — — — 12.4 15.7 18.9
115 — — — — — — — — 8.9 13.3 17.8
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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