Carrier 50QQ - Manual (Page 5)

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step 5—Make Electrical Connections
—Install field wiring
in compliance with loced and national fire, safety and electri­
cal codes. Be sure voltage to unit is within ± 10% of volt­
age indicated on nameplate. Contact local power company
for correction of improper line voltage.
Operation of unit on improper line voltage constitutes
abuse and may cause unit damage that could affect war­
ranty.
See Table 3 for recommended fuse sizes.
INSTALL A BRANCH CIRCUIT DISCONNECT PER
NEC of adequate size to handle unit starting current. Pro­
vide a separate disconnect for unit and for each accessory
electric heater circuit as required. (See electric heater Instal­
lation, Start-Up and Service Instructions.) Locate discon-
nect(s) within sight from and readily accessible from the
unit, per Section 440-14 of National Electriced Code (NEC).
ROUTE LINE POWER LEADS INTO UNIT-Extend
leads from disconnect per NEC through hole provided
(Fig. 1) into line wiring splice box. Use copper wire only.
CONNECT GROUND LEAD TO GROUND LUG in splice
box for safety. Connect power wiring. See Fig. 7. Connect
line power leads to yellow and black pigtails on single-phase
units.
SET INDOOR FAN MOTOR SPEED-Refer to page 3 for
minimum edlowable eiir quantity for safe electric heater
operation. Indoor fan motor is factory wired for low-speed
operation on all models. Fan motor is equipped with spade-
type speed selector terminals marked 1, 2 and 3 on 3-speed
motors (042 and 048), and 1 and 2 on 2-speed motors (018,
024, 030, 036 and 060).
For electric heater operation, set motor at: LOW—sizes 018
through 042, and 060; MED—size 048.
MOTOR TERMINAL 1 2 3
FAN SPEED
(3-speed, 042, 048)
High Medium Low
FAN SPEED
(2-Speed, 018-036, 060)
High Low —
For air delivery performeuice, refer to Table 4.
ROUTE CONTROL POWER WIRES (24v) through 78-in.
connector provided in unit. Fig. 1. Extend leads to unit con­
trol wiring terminal boeu-d in unit control box. Fig. 6. Con­
nect leads to terminal board as shown in Fig. 8.
The unit transformer supplies 24-v power for complete sys­
tem including accessory electric heater. A resettable circuit
breaker is provided in the 24-v circuit.
START
THERMISTOR
TRANSFORMER
CONTACTOR
TIME GUARD
HEATER
CONTROL RELAY
RUN
CAPACITOR
CONTROL
VOLTAGE
CIRCUIT
BREAKER
CONTROL
BOARD
SUPPLE­
MENTAL
HEAT
RELAY
SERVICE
SENTRY
UNIT
GROUNDING
LUG
HEATER
HEATER
LIM^ i 7 c ONTROL S^PLT^AGE GROUNDING
connection
Fig. 6—Control Section
ACCESSORY DUCT FLANGE KIT INSTALLATION-
018-048
1. Refer to Fig. 8 for duct adapter dimensions and hole
locations.
2. Mark hole locations.
Table 3—Unit Electrical Data (60 Hz)
MODEL
5000
V-PH
OPER
VOLTAGE* COMPRESSOR IFM
FLA
OFM
FLA
MAX FUSEt
OR HACR CKT
BKR AMPS
MCA
Max Min LRA r RLA
018 50 0 9.3 3.5 1 4 25 165
024 53.0 11 6 35 1.4 30 19.4
030 65.0 13.9 35 1.4 35 22.2
036 208/230-1 253 187 82 0 17.2 35 22 40 27 2
042 106.0 20 7 35 22 50 31.6
048 1100 22.4 4.6 2.2 50 34.8
060 178.0 30.2 6.7 2.8 60 47.3
030 53 0 81 35 1 4 20 15.0
036 67 5 108 35 2.2 25 19 2
042 208/230-3 253 187 79 5 12.0 46 2.2 30 21.8
048 90.0 146 4.6 22 35 25 0
060 124.0 20.5 6.7 2.8 45 35.1
036 33.8 5.0 1 7 07 15 8.7
042 460-3 506 414 398 63 20 1.3 15 11 2
048 45 0 7.0 20 1.3 15 12.1
060 62.0 10.3 3.4 1.3 25 17.6
FLA —Full Load Amps
HACR—Heating, Air Conditioning, Refrigeration
IFM —indoor Fan Motor
LRA —Locked Rotor Amps
MCA —Minimum Circuit Amps
OFM —Outdoor Fan Motor
RLA —Rated Load Amps *Permissibie limits of the voltage range at which units will operate
satisfactorily.
tMaximum dual element fuse
NOTE: Use copper wire only.