Mitsubishi Electric PURY-EP200YLM-A, Service Handbook

Page: 377 / 434

[8-14 Solenoid Valve Block and Check Valve Replacement Instructions ]
- 366 -
HWE1314A GB
H (ø22.2)
2 3
J (ø22.2)
2 3
(2) Check valve (CV4a, CV6a, CV8a) replacement procedures
Remove the Solenoid valve block ASSY following "(1) Solenoid valve block ASSY (SV4a, SV4b, SV4d) replacement
procedures" on the previous page.
Debraze H-K parts (total 4 places), and remove the Check valve ASSY.
Replace the Check valve (CV4a, CV6a, CV8a) to be serviced while it is removed from the unit.
Mount the Solenoid valve block ASSY, coil cover, and peripheral cables back in place according to "(1) Solenoid valve
block ASSY (SV4a, SV4b, SV4d) replacement procedures" on the previous page.
Part A
(Refer to the
next page.)
* After removing Solenoid valve block ASSY
*
Precautions for replacing Check valve
•
Be sure to perform no-oxidation brazing when brazing.
• Place a wet towel on the Check valve when heating pipes to keep the temperature of the valve from
exceeding 120ºC.
• After brazing, check the condition around the brazing. After confirming no leakage, evacuate the air inside.
• Perform carefully with the flame direction so that it does not burn cables and plates etc. in the unit.
• Remove the brazing part protecting heat exchanger not to be burn, and replace the service parts.
2
1
3
4