Carrier 50DL - Manual (Page 10)

Table 3 — Electrical Data — 50DL064
MODEL VOLTAGE COMPR COMPR
OUTDOOR
FAN
INDOOR
FAN
EXHAUST
FAN HEATERS
POWER
NOMINAL
VOLTS-PH-HZ
RANGE NO. 1 NO. 2
MOTORS MOTOR MOTOR
SUPPLY
Min Max RLA LRA RLA LRA Qty FLA Hp FLA Hp FLA kW FLA MCA MOCP*
25 75 — — — — 370 400
25 75 3 11 — — 392 450
30 88 — — — — 383 450
25 75 — — 60/73 2 166/184 370 450
25 75 — — 75/91 5 208/230 370/382 500
50DL064
187 254 119 506 119 506 4 6 6/6 0
30 88 3 11
_ _
405 450
208/230-3-60 25 75 3 11 60/73 2 166/184 392 450
25 75 3 11 75/91 5 208/230 392 500
30 88 — — 60/73 2 166/184 383 500
30 88 — — 75/91 5 208/230 383/398 500
30 88 3 11 60/73 2 166/184 405 500
30 88 3 11 75/91 5 208/230 405 500
25 34 — — — — 166 200
25 34 3 48 — — 175 200
30 40 — — — — 172 200
25 34 — — 73 2 92 166 225
25 34 — — 91 5 115 187 250
50DL064
460-3-60
414 508 53 253 53 253 4 30
30
25 40
34 3
3 48
48
73 2 92
181
175 200
225
25 34 3 48 91 5 115 187 250
30 40 — — 73 2 92 172 250
30 40 — — 91 5 115 194 250
30 40 3 48 73 2 92 181 250
30 40 3 48 91 5 115 194 250
LEGEND (Tables 2 and 3)
Compr — Compressor
FLA — Full Load Amps
Hp — Nominal Horsepower
kW — Kilowatts
LRA — Locked Rotor Amps
MCA — Minimum Circuit Ampacity
MOCP — Maximum Overcurrent Protection
RLA — Rated Load Amps
*Fuse only.
NOTES (Tables 2 and 3)
1 All outdoor fan motors are single-phase motors
2 All heaters are 3-phase assemblies
3 Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase unbalance in supply volt­
age is greater than 2% Use the following formula to determine
the % voltage unbalance
% Voltage Unbalance
max voltage deviation from average voltage
Example:
A B
Supply voltage is 460-3-60
AB = 452 volts
BC = 464 volts
AC = 455 volts
Average Voltage =
452 + 464 -r 455
1371
= 457
100 X -
Determine maximum deviation from average voltage
(AB) 457 - 452 = 5 volts
(BC) 464 - 457 = 7 volts
(AC) 457 - 455 = 2 volts
Maximum deviation is 7 volts
Determine % voltage unbalance
% Voltage Unbalance = 100 x - ~ = 1 53%
“ 457
This amount of phase unbalance is satisfactory as it is below
the maximum allowable 2%
¿i
-gíítíf
average voltage
START-UP
Constant Volume Units
COOLING (WITH OR WITHOUT ENERGY
MANAGEMENT OPTION)
1. Open compressor service valves. Make sure the
crankcase heater has been on for at least 24 hours
to remove liquid refrigerant from compressor
crankcase. Check compressor oil level. Oil sight
glass should be half full.
2. Be sure that the liquid line service valve is open
and that high- and low-side refrigerant service
ports are closed as applicable.
3. On units equipped with the Energy Management
option, move the COOL SETUP SELECT
jumper wire to the desired setting(5°, 8°, or 12°).
If cooling is not desired during the unoccupied
periods, move jumper wire from COOL SETUP
to COOL LOCKOUT. See Fig. 15.
4. Turn on power to unit. On standard units, set the
subbase selector switch to COOL. On units with
the Energy Management option, set the 7-day
time clock as required. Refer to 7-Day Time
Clock Adjustment. Check that compressor low
ambient lockout contacts and morning warm-up
contacts (on units with Energy Management
option) are closed.
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