discharge pressure relife valve opening

[govindarajan]

hi,

i am using bitzer 6g.2 open type compressor for our chillroom,recently compressor getting over heat and internal pressure relife valve (bypassing)opening.crankcase also heating toomuch,interneal parts are ok.
i try to replace new but still it is behaving same.
expantion valve is Tex2(orifice 3).
can any one help me to solve the problem.

Thanks
Govind

[moideen]

hi,

i am using bitzer 6g.2 open type compressor for our chillroom,recently compressor getting over heat and internal pressure relife valve (bypassing)opening.crankcase also heating toomuch,interneal parts are ok.
i try to replace new but still it is behaving same.
expantion valve is Tex2(orifice 3).
can any one help me to solve the problem.

Thanks
Govind

what is the discharge pressur?
check any referigerant restriction on dischrge line. ,discharge service valve or etc.

Moideen-dubai

[GHAZ]

Hi measure the temperature across the heads,the hottest one may have broken discharge valve or blowen gasket

[govindarajan]

hi i opened all the heads found no damaged valves,but i have replaced one gasket and purged the condenser properly.

[govindarajan]

hi all the line are open no restrictions,discharge pressure is 16bar&suction at 0.75bar.

[serviceman]

relief valve is damaged. pressure to open the valve? high pressure switch must first open

[Gary]

What refrigerant are you using?

[monkey spanners]

What refrigerant are you using?

It should be R22 with a tex model txv.

Jon

[Grizzly]

Anyone else considering that there may be air in the system?
Grizzly

[moideen]

hi all the line are open no restrictions,discharge pressure is 16bar&suction at 0.75bar.

hi govin,your comp.high pressure from discharge chamber does not run away to discharge line. Though your discharge service valve stem is fully back seated, if not moving valve inner device, then relief valve will be opened. check your service valve properly.
Moideen-Dubai

[D.D.KORANNE]

Check the rating of safety valve.
Since if it opens up at the given setting , it means pressure indeed is high . Have your presure gage (hp) checked up . Instead check why hp is shooting up ; find reasons .
Besides check the safety valve for leak on its seat .