Where can I find my Vaillant 415 water pressure gauge?

[pacman2015]

Sorry, it may be a stupid question to ask. But I really can't figure it out.
My CH system is the very traditional one(boiler in the ground floor, water tank in 1st floor, another tank in the loft). I am having problem with my CH but the hot water works ok. I got the faulty code of S. 30

I want to find out the water pressure in the system but I couldn't find the gauge? They are not on the Boiler (Vaillant Ecotech 415) nor in the water tank cupboard. Where can I get the reading? Or I don't need one for this type of the boiler?

Thank you very much in advance!!

 

[Bunnyman]

s30 means it's not receiving a signal from external controls so pressure Irrelavent anyway, so look at clock or motorised valve fault external to boiler

 

[pacman2015]

s30 means it's not receiving a signal from external controls so pressure Irrelavent anyway, so look at clock or motorised valve fault external to boiler

Thanks for your reply Bunnyman! I knew the external control problem and ordered a new set (waiting for delivery, I am not 100% sure it is the fault to be honest. But I need try it before I call the expensive installer). Water pressure is irrelevant but shouldn't it show it somewhere? If the pressure is very low in the system, how can I know?

 

[Dan Robinson]

The 415 doesn't necessarily have to be on a sealed system.

 

[Bunnyman]

As Dan said it may be open vent but not relavent with that code anyway, what have you ordered

 

[pacman2015]

Thanks Again.
I ordered a Salus ST620VBC. I thought it would solve my problem as it directly integrated to the boiler. But I was wrong. I installed it tonight to my boiler and it did nothing!

Next to my boiler is a controller which controllers Hot Water and CH (Centaurplus C21 Series 2). In the 1st floor airing cupboard, there is another controller (Honeywell HC60NG) which talks to Room thermostat HCW80 via RF.

At beginning, I bought another Honeywell set. I only used the new room thermostat because I think the HC60NG in the cupboard room is ok. But new thermostat still can't turn the CH on. I am pretty sure I paired them correctly. When I put the temp up on the thermostat, I could hear the click sound inside the HC60NG. So I thought, ok, let's have an integrated controller.

What shall I do next? Shall I change the HC60NG as well (not very confident to do the wiring to be honest.)?

 

[Dan Robinson]

Time to call someone in methinks.

 

[Bunnyman]

Call someone mate ur wasting money, that salus is for Combi, I think you will fine it's a simple motor change in ur 2 port valve

 

[pacman2015]

Yes, I think I have to call someone. I will get the refund for the controllers.

So you think it's the problem of the motorised valve? Anyway I could check that?

 

[pacman2015]

On the motorised valve, it says Y plan 3 position Diverter Valve? So it's a 3 port valve?

 

[Bunnyman]

I would start there then

 

[pacman2015]

You are absolutely right on the motorised valve! Watched a few youtube videos and I switched the lever on the valve from auto to Manual! And I got hot water in the CH system!! But the only problem is I can't fire the boiler up by CH switch but by Hot Water switch!

I think it means I need a new valve. I will order a new Honeywell 3 port motorised valve tomorrow and change it myself.

 

[muggles]

You probably just need a new motor rather than a complete new valve. At worst you'll just need a new head

 

[pacman2015]

Thanks Andrew for your advice. I've ordered a new set on Amazon for £60. When I receive, I will just change the motor first and see what happen. If I have to change the valve, it means I have to drain the water etc. A lot more trouble!

Thank you very much for your reply.