Salamander trouble

[dean1979]

Hi all,

Installed a ct50, 100% as per manu instructions. The valve it feeds is a thermostatic vale which also says is fine for a pump. The head on the shower is a rain head. The pressure aint brill, but its not gonna be with 1.5bar on a rain head. The problem I have is it runs fine but when testing I turned it to all the way cold and the pump hunts/stutters. I cannot for the life of me work out why. I have installed check valves and really have done a 100% install as its for a customer.


ANy suggestions welcom as I am stumped
cheers

 

[seco services]

is all the cold isolation valves open or the cold is airlocked.

 

[dean1979]

thanks for the reply, the iso's are fully open as for an airlock, I dont see how it could have one, if it did would it push through

 

[seco services]

I dont see how it could have one, if it did would it push through

not always.

hows the pipe layout on the cold ?

 

[dean1979]

the pipe runs to the pump down from the cold storage with just one bend and virtical all they way. The outlet comes out the top of the and down under the floor and then down the wall to the bathroom.

(the cylinder and cold water storage is above the bathroom)

 

[seco services]

where the pipe comes out of the top of the pump then down vertical under the floor is a air trap it should have a bleed valve on the highest pipework out of the pump.
air go's up won't come down so is trapped.

 

[dean1979]

AH right,
that makes sense.

Absolutley not knocking what you are saying, coz now you've said it even I can see the problem. How come salamander dont encorperate this into their manual, as the pipes always come out the top of the pump and the go down to a shower.

Thanks for your help.