34
Table 14 — Evaporator-Fan Motor Efficiency
MOTOR 551B EFFICIENCY
024, 036, 048
75
060
74/84*
072
84
*Single-phase/3-phase.
NOTE: Convert watts to bhp using the fo llowing formula:
watts input x motor efficiency
bhp =
746
GENERAL FAN PERFORMANCE NOTES
1. Values include losses for filters, u nit casing, and wet coils. See Table 12 a nd 13 and Fig. 36 for accessory/FIOP static pressure
information.
2. Extensive motor and electrical testing on these units ensures tha t the full range of the motor can be utilized with conf idence. Using the
fan motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.
See Table 10 and 11 on this page for additional information.
3. Use of a field-supplied motor may affect wire sizing. Contact your Bryant representative to verify.
4. Interpolation is permissible. Do not extrapolate.
5. Performance includes clean filter and wet coil.
Table 14—Fan Performance 551C 024 — Vertical Discharge Units; Standard Motor (Belt Drive)**
EXTERNAL STATIC PRESSURE (in. wg)
AIRFLOW
0.1 0.2 0.4 0.6 0.8 1.0
m
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bh p Rpm Bhp
Rpm Bhp
600
500 0.08 531 0.08 607 0.14 713 0.21 788 0.29
878 0.37
700
529 0.09 567 0.09 633 0.16 739 0.24 816 0.32
902 0.41
800
547 0.1 592 0.12 660 0.19 761 0.27 845 0.37
937 0.47
900
570 0.13 620 0.14 691 0.22 793 0.32 870 0.42
957 0.53
1000
599 0.15 650 0.16 717 0.26 818 0.36 894 0.47
981 0.58
551B,C
