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multiple
A multiple-unit train or simply multiple unit (MU) is a self-propelled train composed of one or more carriages joined together, which when coupled to another multiple unit can be controlled by a single driver, with multiple-unit train control.
Although multiple units consist of several carriages, single self-propelled carriages - also called railcars, rail motor coaches or railbuses - are in fact multiple-units when two or more of them are working connected through multiple-unit train control (regardless if passengers can walk between the units or not).
The term multiple unit does not denote locomotives using multiple-unit train control.
hi, I have 4 small bedsits, the heating (radiators) for all 4 is by a single Ideal Vogue c40 Gen2 boiler, I'm wanting to install a seperate smart thermostat in each of the 4 bedsits and ideally 1 in the communal area (5 thermostats in total), does anyone know of a system that will support this...
Good afternoon,
Our system is losing pressure on a daily basis. Despite repeated top ups. I have listed the key points below.
When motorised valve on the heating side is switched to automatic.
System loses pressure overnight. Guage on top of expansion tank drops to zero.
I then top the...
Deleted member 100166
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central
central heating
heating
heating system
losing
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plumber
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pressure drop
replacement
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Hi,
I have a question about the implications of running multiple bottle traps in series - say for example 6 bottle traps between a sink and drain, what would I need to do to make this work (will be used on an isolated system for experimentation)
I understand that without venting in between the...
Up until the last month or two I had managed to only make one claim since I started 8 ish yrs ago. But in the last 6 weeks ish I find myself needing to make 2. Anyone else had to do this? Making me feel like I'm a walking disaster. Neither are huge, should both fall under the £2k mark with any luck.
Hi, I am trying to find a suitable wireless thermostat with heating timer options which can be programmed for 4/5 times a day ON/OFF setting with different temperature settings.
Will appreciate anyone sharing their knowledge. Thank you
Hello,
as the title suggests we have multiple problems with our c/h and are looking for any guidance or advice. I thought it best to list all the problems we have, as briefly as possible, in the hope someone could help with any of them or maybe see a link between some of them to point...
Hello all
I am designing an 4 zone central heating system, which comprises of:
- Vaillant Ecotec Plus 637
Zone 1 - Main Unvented Direct Hot Water Cylinder 300l
Zone 2 - Garage Rads
Zone 3 - House Rads
Zone 4 - UFH manifold (Nu-Heat)
2 Channel Programmer for zones 1, 2.
1 Channel Programmer...
Hi all, I recently had a new unvented everflow 180 tank installed. The pressure off the tank is awesome, however if i run a bath and the kitchen sink is on, both take a huge drop in pressure more so than i'd expect. Is there anything that can be done about this or not?
I'm fitting a garden tap, and all going well but I am after some advice on the best way to connect to my cold feed.
I have a self-cutting tap (the one you get with those garden tap kits) which has a double check valve to stop the water entering the cold water pipe. I would normally just attach...
JohnthePainter
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attach
check
cutting
double
fitting
garden
garden tap
multiple
options
tap
Hi all,
I need some advice installing a new toilet. Please tell me if you think if it is likely to create blockage if I install an horizontal rigid pan connector with multiple bends; it is about 1.5 meters long from the toilet to the vertical pipe, and I have limited gradient (maybe 15mm if I...
adamlondon
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behind
bends
connector
horizontal
multiple
oil
pan
pan connector
soil
through
toilet
Hi I am running 4 showers simultaneously as I have a small personal training center. But when more then 1 shower in being used the water pressure seems to drop. I am running an unvented 24kw 300 litre direct hot water tank. And my cold is coming straight from the mains. My cold water pressure...
Hi there,
Im about to take my ACS and need something clearing up. I was taught that if you have 2 or more appliances of the same category in a room (e.g. Open flued boiler & a radiant gas fire) then adventitious air is not taken into account. However, reading other books and online literature...
I had an original central heating/hot water system incorporating a single pump, single room stat and a mid-position valve. I have now built an extension and extended the heating system so that I have 2 pumps and an additional 3 zones each controlled with its own valve and stat. There is a single...
craigskelly
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diagram
forum
mid position
multiple
overrun
plumbing
position
pump
pump overrun
valve
wiring
zone
A recent first time customer who are family friends called me to fix a boiler fault which I did. During my visit I noted several NCS and an AR fault on the flue installation. A notice was issued and an estimate for given.
I saw the customer last night and while chatting I dropped in the...
Hi All,
I have a problem with a Worcester Bosch Greenstar 24i boiler. It has had several heat exchangers over the last six years due to limescale build up, what happens is that the hot water supply loses pressure then it won't warm the water. The central heating continues to work ok.
A new...
james75
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exchanger
exchangers
heat
multiple
problem
replacement
scale
water
Hi,
Im sure this question isn't a new one but im having to add another zone for an extension. There is currently 4 zones in total 1 for the cylinder and 3 for heating . My question is, is there a limit for the (electrical side) for how many zones you can have? as far as im aware there isnt but...
Essex insulation energy solutions urgently require plumbing teams for first and second fix.
We have multiple sites in Kent and Essex at various stages.
We are about to start to large sites in Essex and Kent, as well as other ongoing sites.
We are looking for multiple teams for all sites...
Only having tickets for cookers and boilers. So, I only have the two tickets mentioned and have never worked any where that had a gas fire installed. Now a guy has called me up saying he has been told the inlet at the boiler is low and needs bigger size. But am I allowed to work on this as as I...
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