Leak Detection - Trane Start to Finish R-410A Installation Manual

Removal and Installation
182–361 Nominal Capacity
• Before removing wires, mark them so that they can be
put back on the same terminal when the new
compressor is installed.
• Ensure that the compressor model terminals are
installed on the correct terminals (see
• If the compressor is not wired properly, it will shut off
within five seconds.
• Proper torque for the terminal screws is 25 in·lb.
Note: When equipped with terminal stud with a nut,
torque the nut to 30 ± 2 in·lb.
• Before starting the compressor, check the electrical
phasing with a phase sequence meter similar to an
Ideal-Sperry Model 61-520.
Figure 20. 182–361 nominal capacity wiring diagram
L1
A
L2
B
L3
C
L1 L2 L3
POWER MODULE INPUT
SUPPLY
PHASING TO BE CONNECTED AS SHOWN TO
PREVENT REVERSE ROTATION
090–181 Nominal Capacity
The terminal blocks are marked with red and blue dots for
phase identification. Compressor terminal T1 is red,
compressor terminal T2 is blue, and compressor terminal
T3 is unmarked. Depending on the unit type, several
methods of marking the wires may be used, colored wires,
wire color marks on the wire or wire numbers to indicated
the proper location of the wire on the compressor terminal
block.
If the wires are not marked, ensure that you mark them
prior to removing them so that they can be reinstalled in
the same position.
26
Figure 20).
BROWN
BLUE
BLACK
L1 L2 L3
L N S1 S2 M1 M2
L N M1 M2
CONTROL
VOLTAGE CIRCUIT
Figure 21. 090–181 nominal capacity wiring diagram
Blue dot
indicating T2
(Phase B)
Red dot
indicating T1
(Phase A)
• Ensure that the compressor model terminals are
installed on the correct terminals (see
• Proper torque for the terminal screws is 25 in·lb.
Note: When equipped with terminal stud with a nut,
torque the nut to 30 ± 2 in·lb.
NOTICE
Improper Power Phasing!
Operating the compressor with improper phasing could
cause compressor failure. Check phasing before starting
compressor.
• Before starting the compressor, check the electrical
phasing with a phase sequence meter similar to an
Ideal-Sperry Model 61-520.

Leak Detection

WARNING
Hazard of Explosion!
Failure to follow instructions below could result in
death or serious injury or equipment or property-only
damage. Use only dry nitrogen with a pressure
regulator for pressurizing unit. Do not use acetylene,
oxygen or compressed air or mixtures containing them
for pressure testing. Do not use mixtures of a hydrogen
containing refrigerant and air above atmospheric
pressure for pressure testing as they may become
flammable and could result in an explosion. Refrigerant,
when used as a trace gas should only be mixed with dry
nitrogen for pressurizing units.
Unmarked
T3
(Phase C)
Figure 21).
PART-SVN234B-EN