TRV query - Danfoss

wig

Joined
14 Jun 2006
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PONTYPRIDD
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United Kingdom
My Danfoss TRV have a very thin pin,

I unscrew the bottom of the main white plastic cover and the white cover pulls off to reveal the brass head with pin.

The pin goes into a circular grey plastic fitting which itself can be turned by about 90 - 180 degrees (I forget) below this is the brass.

When fitted, the white plastic head does not turn this grey circle so my question is what does the grey turning part do? And what position should it be set to?

The pin does not move and does not come out, being so thin I don't want to hit it or mess with it, but how should I determine that it is in working order?
 
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Ok thanks guys,

I will check that all the bi directionals are pointing in the right direction.

What happens if it is set in the wrong direction?
 
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