Electrical Connections; High Voltage - Goodman CONDENSING AC UNIT Installation & Service Reference

5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0 1 2
•
If the pressure rises to 1000 microns or less and remains
steady the system is considered leak-free; proceed to
startup.
• If pressure rises above 1000 microns but holds steady
below 2000 microns, moisture and/or noncondensibles
may be present or the system may have a small leak.
Return to step 2: If the same result is encountered check
for leaks as previously indicated and repair as necessary
then repeat evacuation.
•
If pressure rises above 2000 microns, a leak is present.
Check for leaks as previously indicated and repair as nec-
essary then repeat evacuation.
Refer to the Remote Condensing Unit Service Manual for more
detailed instructions on system evacuation, preliminary charge
adjustment, and final charge adjustment.

Electrical Connections

WARNING

HIGH VOLTAGE!

Disconnect ALL power before servicing.
Multiple power sources may be present.
Failure to do so may cause property damage,
personal injury or death due to electric shock.
Wiring must conform with NEC or CEC and all
local codes. Undersized wires could cause
poor equipment performance, equipment damage
or fire.
WARNING
To avoid the risk of fire or equipment damage, use
copper conductors.
NOTICE
Units with reciprocating compressors and non-bleed TXV's
require a Hard Start Kit.
This unit is designed for three phase operation. DO NOT OP-
ERATE ON A SINGLE PHASE POWER SUPPLY. Measure
the power supply to the unit. The supply voltage must be in
agreement with the unit rating plate power requirements.
LEAK(S)
PRESENT
CONDENSIBLES OR SMALL
LEAK PRESENT
NO LEAKS
NO CONDENSIBLES
3 4 5 6 7 8 9
10
MINUTES
RATED MINIMUM SUPPLY
VOLTAGE VOLTAGE
208/230V
460V
The condensing unit rating plate lists pertinent electrical data
necessary for proper electrical service and overcurrent protec-
tion. Wires should be sized to limit voltage drop to 2% (max.)
from the main breaker or fuse panel to the condensing unit.
Consult the NEC, CEC, and all local codes to determine the
correct wire gauge and length. The wire size must be sufficient
to carry the Minimum Circuit Ampacity (MCA) listed on the
serial plate.
The supply voltage can be unbalanced (phase to phase) within
2%. The following formula can be used to determine the per-
centage of voltage unbalance for your unit.
Percentage
Voltage =
Unbalance
Example:
L1-L2 = 220V
L2-L3 = 216V
Average Voltage = (220 + 216 + 213)/3
= 649/3
Maximum Deviation from Average = 220 - 216 = 4
% Voltage Unbalance = 100 x (4/216)
MAXIMUM ALLOWABLE LENGTH IN FEET
TO LIMIT VOLTAGE DROP TO 2%
Wire
Minimum Circuit Ampacity (MCA)
Size
10 15
(AWG)
14 75 50
12 118 79
10 188 125
8 301 201 150 120 100
6 471 314 235 188 157 134 118 110
*Based on NEC 1996
5
MAXIMUM SUPPLY
VOLTAGE
197 253
414 506
Max. Voltage Deviation Form
Average Voltage
Average Voltage
= 400/216
20 25 30 35
37 NR NR NR NR
59 47 NR NR NR
95 75 63 54 NR
86
40 45
NR
NR
NR
75 68