Mitsubishi Electric PURY-P200YLM-A(1) Service Handbook page 387

[8-14 Solenoid Valve Block and Check Valve Replacement Instructions ]
(2) Check valve (CV4a, CV6a, CV8a) replacement procedures
Remove the Solenoid valve block ASSY following "(1) Solenoid valve block ASSY (SV4a, SV4b, SV4d) replacement
1
procedures" on the previous page.
Debraze H-K parts (total 4 places), and remove the Check valve ASSY.
2
Replace the Check valve (CV4a, CV6a, CV8a) to be serviced while it is removed from the unit.
3
Mount the Solenoid valve block ASSY, coil cover, and peripheral cables back in place according to "(1) Solenoid valve
4
block ASSY (SV4a, SV4b, SV4d) replacement procedures" on the previous page.
* 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.
HWE1314A
* After removing Solenoid valve block ASSY
- 376 -
H (ø22.2)
2 3
I (ø15.88)
2 3
Part A
(Refer to the
next page.)
K (ø15.88)
2 3
J (ø22.2)
2 3
GB