At work we occupy an old coach house with a 1950s ballroom attached,
The heating is all on one zone and the ballroom has 3 radiators
supplied under floor, the rest of the house has a mixture of pressed
steel radiators with lockshield valves and old cast iron radiators
with 30mm valves. The ballroom gets hot before the rest so I am
considering putting a honeywell valve where the inlet pipe goes under
the floor (in a boiler room adjacent to the ballroom) and using a
wireless thermostat from the ballroom to cut flow just to this zone
when the thermostat is satisfied. Can anyone see fault with this idea?

AJH

wrote in message
...
At work we occupy an old coach house with a 1950s ballroom attached,
The heating is all on one zone and the ballroom has 3 radiators
supplied under floor, the rest of the house has a mixture of pressed
steel radiators with lockshield valves and old cast iron radiators
with 30mm valves. The ballroom gets hot before the rest so I am
considering putting a honeywell valve where the inlet pipe goes under
the floor (in a boiler room adjacent to the ballroom) and using a
wireless thermostat from the ballroom to cut flow just to this zone
when the thermostat is satisfied. Can anyone see fault with this idea?

AJH

You'll probably find it's well rusted steel pipe if it's that age.

The sort of job that could easily escalate into something major/complete
renewal as the pipe might break if disturbed.
Have you got the pipe screwing equipment?

If it's all one zone, how is fitting a zone valve going to turn one part of
it off?

In article ,
writes
At work we occupy an old coach house with a 1950s ballroom attached,
The heating is all on one zone and the ballroom has 3 radiators
supplied under floor, the rest of the house has a mixture of pressed
steel radiators with lockshield valves and old cast iron radiators
with 30mm valves. The ballroom gets hot before the rest so I am
considering putting a honeywell valve where the inlet pipe goes under
the floor (in a boiler room adjacent to the ballroom) and using a
wireless thermostat from the ballroom to cut flow just to this zone
when the thermostat is satisfied. Can anyone see fault with this idea?

Basically a sound idea with a couple of mild reservations:

Zone valves aren't continuously rated so it would be better if you feed
the live feed to the wireless receiver relay contacts from the boiler
demand. This means that the zone valve will only become energised when
the rest of the house and the ballroom are calling for heat.

Whilst they are one of the most user friendly range of wireless stats, I
would suggest avoiding Honeywell models for this application as they
only offer proportional control. This means that they will cycle at
times that cannot be guaranteed to coincide with the demand from any
main house stat. Better to choose one with simple on-off control which
is more common on cheaper stats and jumper selectable on a few of the
more expensive ones.
--
fred
it's a ba-na-na . . . .

On Sun, 8 Feb 2015 10:47:19 +0000, fred wrote:


Basically a sound idea with a couple of mild reservations:

Zone valves aren't continuously rated so it would be better if you feed
the live feed to the wireless receiver relay contacts from the boiler
demand. This means that the zone valve will only become energised when
the rest of the house and the ballroom are calling for heat.

OK but is there a zone valve that can be motored up or down from the
thermostat without needing to be continuously fed?

Whilst they are one of the most user friendly range of wireless stats, I
would suggest avoiding Honeywell models for this application as they
only offer proportional control. This means that they will cycle at
times that cannot be guaranteed to coincide with the demand from any
main house stat. Better to choose one with simple on-off control which
is more common on cheaper stats and jumper selectable on a few of the
more expensive ones.

Any suggestions for a cheap one?

Thanks

AJH

In article ,
writes
On Sun, 8 Feb 2015 10:47:19 +0000, fred wrote:


Basically a sound idea with a couple of mild reservations:

Zone valves aren't continuously rated so it would be better if you feed
the live feed to the wireless receiver relay contacts from the boiler
demand. This means that the zone valve will only become energised when
the rest of the house and the ballroom are calling for heat.

OK but is there a zone valve that can be motored up or down from the
thermostat without needing to be continuously fed?

They're uncommon in domestic installations (so expect them to be
expensive) and outside my experience but there are a couple of makes
mentioned in the group FAQ:

http://wiki.diyfaq.org.uk/index.php?...torised_Valves

I'd expect you to need a stat with changeover contacts but I'd expect
that to be the norm on those that you will be considering. Check in the
specs that they don't mind having the excitation voltage applied
continuously.

Whilst they are one of the most user friendly range of wireless stats, I
would suggest avoiding Honeywell models for this application as they
only offer proportional control. This means that they will cycle at
times that cannot be guaranteed to coincide with the demand from any
main house stat. Better to choose one with simple on-off control which
is more common on cheaper stats and jumper selectable on a few of the
more expensive ones.

Any suggestions for a cheap one?

I've used the wired version of this Grasslin wireless model:

www.toolstation.com/shop/p53555

56quid so less than most and it is at least a known brand.

It's adequate if a tad less easy to program than the market leaders but
the printed crib sheet on the back of the little door on the RHS that
hides a couple of extra programming buttons is clear enough. No
automatic GMT/BST switching.

--
fred
it's a ba-na-na . . . .

On 08/02/2015 12:25, fred wrote:

No
automatic GMT/BST switching.


How many have their CH heating on in the summer?


--
mailto: news {at} admac {dot] myzen {dot} co {dot} uk

On 2/8/2015 2:00 PM, alan_m wrote:
On 08/02/2015 12:25, fred wrote:

No
automatic GMT/BST switching.


How many have their CH heating on in the summer?

I sometimes do - on the north coast of Scotland.

On 08/02/15 11:22, wrote:
On Sun, 8 Feb 2015 10:47:19 +0000, fred wrote:


Basically a sound idea with a couple of mild reservations:

Zone valves aren't continuously rated so it would be better if you feed
the live feed to the wireless receiver relay contacts from the boiler
demand. This means that the zone valve will only become energised when
the rest of the house and the ballroom are calling for heat.

OK but is there a zone valve that can be motored up or down from the
thermostat without needing to be continuously fed?

There are but I've never seen one in the wild.

I was not aware of a zone vale not being continuously rated - that would
be a serious flaw as some places my be calling for heat for long periods
in the winter.

On 08/02/2015 17:35, Tim Watts wrote:
On 08/02/15 11:22, wrote:
On Sun, 8 Feb 2015 10:47:19 +0000, fred wrote:


Basically a sound idea with a couple of mild reservations:

Zone valves aren't continuously rated so it would be better if you feed
the live feed to the wireless receiver relay contacts from the boiler
demand. This means that the zone valve will only become energised when
the rest of the house and the ballroom are calling for heat.

OK but is there a zone valve that can be motored up or down from the
thermostat without needing to be continuously fed?

There are but I've never seen one in the wild.

I was not aware of a zone vale not being continuously rated - that would
be a serious flaw as some places my be calling for heat for long periods
in the winter.


Domestic spring return valves us a tiny synchronous motor that stalls
when the valve is open. It will sit in this state for years without
overloading even with hot water passing. The spring just pulls it back
when the power is off.

I would imagine that larger valves would not work like that as the motor
power would increase with bigger valves and motor return valves would be
the common type.