Carrier 09DK054-094 - Manual (Page 31)

MAIN POWER WIRING — The units must have adequate
overcurrent protection, fuses, or HACR (Heating, Air Con­
ditioning and Refrigeration) breakers, according to the na­
tional and applicable local codes.
For field power connections, all main power wiring en­
ters the unit through a factory-punched access hole under
the control box. Two access holes are provided; the larger
should be used for 208/230 v applications. See Fig. 30.
Wiring must be rated at 75 C minimum. Use copper, copper-
clad aluminum, or aluminum conductors. Field power sup­
ply connections are made at terminal block 1 (TBl). Max­
imum incoming wire size for each terminal connection on
TBl is 2/0, and all power wiring must comply with appli­
cable local and national codes. Refer to the unit power cir­
cuit information to determine incoming wire sizes. (See
Table 4.) Refer to Table 5 for American and European wire
conversion information.
CONTROL CIRCUIT POWER WIRING - Provide a sep­
arate single-phase power source for each control circuit (de­
pending on the coil refrigerant circuit split), with the re­
quired overcurrent protection (fuses or circuit breakers). See
Table 4 for control circuit overcurrent protection amperage.
For field control circuit connections, units are factory wired
for a 50/50% capacity split and utilize terminal blocks 2
and 3 (TB2 and TB3). TB2 controls fans 1, 3, and 5; TB3
controls fans 2, 4, and 6. Fans 5 and 6 are on 074-094 units
only. If 100% condenser application is required, connect
the factory supplied jumpers from TB2-1 to TB3-1 and from
TB2-2 to TB3-2, and bring incoming connections to either
TB2 or TB3. Factory-punched access holes under the con­
trol box are provided for the incoming wires. See Fig. 30
for access hole details. Terminal block connections utilize
no. 8 screws. Wiring must be class 1, 14 AWG (American
Wire Gage) copper conductors only. Power required for con­
trol circuits is 100 va. See Table 4 for control circuit volt­
age data.
GENERAL WIRING NOTES
1. Power entry is at one end only.
2. Fan motors are thermally protected. Three-phase motors
are protected against primary single-phasing conditions.
3. Replacement of factory wires must be with appliance
wiring material rated 105 C, or its equivalent.
4. Factory wiring is in accordance with NEC. Field mod­
ifications or additions must be in compliance with all
applicable codes.
DESCRIPTION OF CONTROLS - The condenser units
use a dual-voltage control scheme: A 3-phase power circuit
for the fan system operation and a single-phase control cir­
cuit voltage for fan cycling control. The number of control
circuit voltages depend on the coil split application used.
See the head pressure control description in the service sec­
tion for a detailed description of the control’s function.
Table 5 — American/European Wire Conversions
AMERICAN EUROPEAN
Industry
Standard Size
American
Conversion
(mm^)
Industry
Standard
Size (mm^)
18 AWG 0 82 1.0
16 AWG 1.30 1.5
14 AWG 2.08 2.5
12 AWG 3.30 4.0
10 AWG 5.25 6.0
8 AWG 6 36 10.0
6 AWG 13 29 16.0
4 AWG 21.14 25.0
3 AWG 26 65 —
2 AWG 33.61 35.0
1 AWG 42.39 50.0
1/0 AWG 53.49 —
2/0 AWG 67.42 70.0
3/0 AWG 85.00 95.0
4/0 AWG 107.19 120 0
250 kcmil 126.64 150 0
300 kcmil 151 97 —
350 kcmil 177.90 185 0
400 kcmil 202.63 240 0
500 kcmil 253.29 300.0
600 kcmil 303.95 —
LEGEND
AWG — American Wire Gage
kcmil — Thousand Circular Miis
Step 5 — Add Accessories As Needed — The
following accessories are available for the 09DK054-094
condensers: Fan sound reduction kit, condenser coil coastal
filter, security grille package, condenser coll hail guard pack­
age, accessory control transformer, Motormaster® III de­
vice, Motormaster III Relay/Sensor Kit, and accessory fan-
control kit. Winter Start and any special electrical interlock
must be considered separately. Refer to installation instruc­
tions furnished with each accessory for more information.
2 13/32”
Fig. 30 — Power Wiring Access Holes; 054-094 Units
31