Carrier 50PD05 Operating And Service Instructions page 100

APPENDIX D - ADDITIONAL START-UP DATA
UNIT
50PD
05
06
Table 60 -- Air Quantity Limits (50PD Units)
COOLING (cfm) HEATING (cfm)
OPTIONAL ELECTRIC HEAT
1200 2000 1200 2000
1500 2500 1500 2500
Table 61 -- Air Quantity Limits (48PD Units)
UNIT COOLING (cfm) HEATING (cfm)
48PD Min Max Min Max
05 (Low Heat) 1200 2000 600 1680
05 (Med Heat) 1200 2000 940 2810
05 (High Heat) 1200 2000 1130 2820
08 (Low Heat) 1500 2500 940 2810
08 (Med Heat) 1500 2500 1130 2820
08 (High Heat) 1500 2500 1510 2520
Table 62 -- Evaporator Fan Motor Specifications
- 48/50PD
48/50PD DRIVE VOLTAGE/PHASE
05 & 06 Low & High 208/230-3ph
460-3ph
NOTES:
1. Extensive motor and electrical testing ensures that the motors can be utilized
with confidence up to the maximum applied bhp, watts, and amps. Using the fan
motor up to the maximum ratings shown will not result in nuisance tripping or
premature motor failure. Unit warranty will not be affected.
2. Convert bhp to watts using the following formula:
bhp (746)
watts = motor efficiency
EFFICIENCY MAX BHP MAX AMPS
0.80 2.0 6.4
0.80 2.0 3.2
3. The EPAC_ (Energy Policy Act of 1992) regulates energy requirements for
specific types of indoor-fan motors. Motors regulated by EPAC_ include any
general purpose, T-frame (three-digit, 143 and larger), single-speed, foot
mounted, polyphase, squirrel cage induction motors of NEMA (National Electrical
Manufacturers Association) design A and B, manufactured for use in the United
States. Ranging from 1 to 200 Hp, these continuous-duty motors operate on 230
and 460 volt, 60 Hz power. If a motor does not fit into these specifications, the
motor does not have to be replaced by an EPAC_-compliant energy-efficient motor.
Variable-speed motors are exempt from EPACW compliance requirements.
Therefore, the indoor-fan motors for Carrier 48/50PG03-14 units are exempt from
these requirements.
Table 63 -- Fan Rpm at Motor Pulley Settings* - 48/50PD
UNIT MOTOR PULLEY TURNS OPEN
48/50PD DRIVE 0 1/2 1 11/2 2 21/2 3 31/2 4 41/2 5
Low 910 878 847 815 784 753 721 690 659 627 596
05
High 1173 1139 1104 1070 1035 1001 966 932 897 863 828
08 Low 978 949 920 891 863 834 805 776 748 719 690
Hiclh 1261 1227 1194 1161 1128 1095 1062 1028 995 962 929
*Approximate fan rpm shown, based on 1725 rpm motor.
NOTE: Factory speed setting is at 5 turns open.
Table 64 -- Accessory/FlOP Pressure Drop (in. wg) - 48/50PD
AIRFLOW ELECTRIC ECONOMIZER ECONOMIZER
(CFM) HEAT (Vertical) (Horizontal)
800 0.01 0.01 0.03
800 0.01 0.01 0.05
1000 0.02 0.02 0.07
1200 0.02 0.03 O. 10
1400 0.03 0.04 O. 14
1600 0.04 0.08 O. 17
1800 0.05 0.07 0.22
2000 0.07 0.09 0.28
2200 0.08 0.11 0.31
2400 0.10 0.13 0.37
2600 0.11 0.15 0.43
2800 0.13 0.18 0.49
3000 0.15 0.21 0.56
100