Morning all.

First, thanks for all your help and advise so far - most useful. I was
up till 2am looking at the boiler, pipes etc just to work out how the
heck all this work!

anyways, here are the answers i promised to give - i still haven't got
CH yet but i havent done anything to the valve yet as i only switched
the whole thing off this morning - so i'm hoping when i get back today,
everything will be cooled down etc which is what i read to do before
any work??


How many pipes connect to this valve? (two or three would be the common
options).

kiichi this turned out to be 3

from the valve:
1 pipe connected to another pipe which connects to the water pump,
boiler and cylinder
1 pipe connected to the cylinder directly (labled hot water port B)
1 pipe going down to the floor labled central heating port A

the valve is SUNVIC SD 1752 and has a label titled UNISHARE.
how do i know that this is 2 or 3 port valve though?

i haven't opened up the plastic case yet - because i was scared it
might cause damage or water might come out - should i worry about these
things?

Have a look at your hot water cylinder; how many pipes do you see in and
out?

kiichi
to the cylinder , there are 4 pipes - can someone tell me what each
might be doing??

1 pipe from the ceiling to the top of cylinder
1 pipe from the ceiling to the bottom of the cylinder
1 pipe from valve
1 pipe from boiler

the cylinder says it is a indirect cylinder

Is this timer connected to the boiler? Does your cylinder have a
immersion heater? (the top of which would normally be visible sticking out the cylinder - it would also have to have wires connecting to it).

kiichi
the 7 day immersion heater timer was indeed connected to the top of
cylinder - so i think i can say that this is for the backup only right?
and can have it set to "PERMANENTLY OFF" setting??

things i noticed:

the pipe coming out of the valve out of the "hot water" port is HOT
the pipe coming out of the valve out of the "central heating" port is
warm/cold as it gets to the floor

That kind of indicates to me that there is no hot water going towards
the radiators, right? Or does the pipes for CH not get that hot??

as i said i havent opened up the valve (the white plastic on the valve)
because i was too scared to do it myself and cause damage but i can
do it myself right without getting a plumber in?

all power to the valve, boiler and everything else in the airing
cupboard is OFF before i do this.

thanks
Kiichi