Trane R Series Diagnostic Troubleshooting Repair page 64

64
Module Power and Miscellaneous I/O
used, it is important to direct the flame away from the valve body. See
17. A wet cloth should be wrapped around the body during soldering to
provide extra protection. This will help prevent overheating and damage to
the synthetic seals and subsequent degradation in valve performance. Valves
are shipped in the full-open position, to allow for the flow of inert gas
while soldering.
Figure 17 Electronic Expansion Valve Soldering
SEO Electronic Expansion Valve Servicing
The procedures listed below are to. be followed for proper disassembly,
inspection, cleaning and reassembly to the valve. The valve does not need to
be removed from the refrigerant piping before servicing.
1. Before disassembly of the valve, be sure the refrigerant pressure in the
system has been reduced to a safe level (0 psig) on both sides of valve.
See RTAA-SB-10 for preferred refrigerant handling in this area.
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote disconnects
before servicing. Follow proper lockout/tagout procedures to
ensure the power cannot be inadvertently energized. For variable
frequency drives or other energy storing components provided by
Trane or others, refer to the appropriate manufacturer's literature
for allowable waiting periods for discharge of capacitors. Verify
with an appropriate voltmeter that all capacitors have discharged.
Failure to disconnect power and discharge capacitors before
servicing could result in death or serious injury.
Note: For additional information regarding the safe discharge of
capacitors, see PROD-SVB06A-EN or PROD-SVB06A-FR
Figure
RLC-SVD03A-EN