4
Install a solenoid valve (field supplied) in liquid line directly
before expansion valve. Solenoid valve is necessary for single
pumpout control used on 06D, 07D units. Refrigerant filter
drier and moisture indicator are shipped with 07D condensing
units for field installation. Install in liquid line according to
manufacturer’s instructions.
Relief valve located on top of condenser (07D units) will
open to relieve excessive pressure, allowing refrigerant to
escape. Most local codes require piping from safety device to
outdoors.
Refer to Carrier System Design Manual, Part 3, for standard
piping techniques.
COMPRESSOR UNITS — Connect high- and low-pressure
switch capillary tubes from control box to compressor. See
Fig. 2.
Install discharge line muffler (accessory) in discharge line
as close to compressor shutoff valve as possible.
Electrical Connections
UNBALANCED 3-PHASE SUPPLY VOLTAGE — Never
operate a motor where a phase imbalance in supply voltage
is greater than 2%. Use the following formula to determine
the % voltage imbalance:
% Voltage Imbalance =
Example: Supply voltage is 230-3-60
AB = 236 volts
BC = 229 volts
AC = 234 volts
Determine maximum deviation from average voltage:
(AB) 236 – 233 = 3 volts
(BC) 233 – 229 = 4 volts
(AC) 234 – 233 = 1 volt
Maximum deviation is 4 volts. Determine % voltage
imbalance:
This amount of phase imbalance is satisfactory as it is below
the maximum allowable of 2%.
ELECTRICAL DATA NOTES
1. All 06D and 07D units are across-the-line start.
2. Wire sizes are based on TW type copper wire. Maximum
wire lengths based on data from Table 1 will result in a
1% voltage drop to compressor. Where up to 3% voltage
drop is allowed, the run length can be increased to 3 times
the length calculated from data in Table 1.
3. The 06D compressor unit electrical data shown in Table 1
does not apply for 06D compressors used as an integral
part of other Carrier equipment. See proper installation
book for electrical information.
WIRING — Power supply must correspond with unit name-
plate electrical characteristics (units are internally wired at
factory for nameplate voltage). Field wiring must comply with
local and national codes.
Install a branch circuit fused disconnect of adequate size to
handle starting current.
LINE POWER — Connect line power to the compressor con-
tactor C. For example, connect L1 to terminal 11, L2 to termi-
nal 12 and L3 to terminal 13. See Fig. 3.
Table 1 — Compressor Electrical Data
LEGEND
*Refer to physical data table to match compressor with correct com-
pressor unit or water-cooled condensing unit.
NOTES:
1. RLA (rated load amps) value shown is: MCC
÷
1.40 = RLA.
2. For minimum contactor sizing, use RLA value determined by:
MCC
÷
1.40 = RLA.
3. For wiring sizing, the RLA value can be determined by: MCC
÷
1.56 = RLA.
4. Compressor operating amps at any specific conditions can only
be determined from a performance curve.
5. RLA values for 06D compressor protected by a calibrated
circuit breaker will depend on must-trip value of circuit breaker.
6. Ohm values shown for resistance are approximate and shown
for reference only. Motors from different vendors and motors of
different efficiencies can differ up to 15% from data shown.
7. Electrical data for compressor part numbers 06DR and
50 Hz models (not shown) are available from Carrier Sales
Representative.
100 x
max voltage deviation from average voltage
average voltage
Average Voltage =
236 + 229 + 234
= 233 volts
3
% Voltage Imbalance =100 x
4
= 1.7%
233
IMPORTANT: If the supply voltage phase imbalance is
more than 2%, contact your local electric utility company
immediately.
COMPRESSOR
PART NUMBER
06D*
VOLTAGE
(3 Ph-60 Hz)
HP MCC RLA LRA
MOTOR WINDING
RESISTANCE
(Ohms)
M
808
575
3
7 5 28.4 5.0
208/230 17.4 12.4 71 0.78
460 8.7 6.2 35.5 3.1
313
575
5
10.8 7.7 40 3.3
208/230 27 19.3 100 0.5
460 13.5 9.6 50 2.1
A
818
575
6.5
17.6 12.6 64 2.6
208/230 44 31.4 160 0.42
460 22 15.7 80 1.7
825
575
7.5
22.2 15.9 79 2.0
208/230 55.5 39.6 198 0.31
460 27.8 19.8 99 1.3
328
575
10
25 17.9 91 1.7
208/230 62 44.3 228 0.26
460 31 22.1 114 1.0
537
575
15
32 22.9 96 1.2
208/230 89 63.6 266 0.18
460 40 28.6 120 0.72
LRA —
Locked Rotor Amps
MCC —
Maximum Continuous Current
RLA —
Rated Load Amps
