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circuit
A circuit breaker is an electrical safety device designed to protect an electrical circuit from damage caused by an overcurrent or short circuit. Its basic function is to interrupt current flow to protect equipment and to prevent the risk of fire. Unlike a fuse, which operates once and then must be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation.
Circuit breakers are made in varying sizes, from small devices that protect low-current circuits or individual household appliances, to large switchgear designed to protect high voltage circuits feeding an entire city. The generic function of a circuit breaker, or fuse, as an automatic means of removing power from a faulty system, is often abbreviated as OCPD (Over Current Protection Device).
hi all
if i do a short circuit test on combi boiler between live and neutral when isolated, if i find a short circuit then i believe that i am supposed to disconnect wires from pcb to each component and test wires and component for short circuit, but how do i test for short circuit on wires and...
hi all,
A very simple question for most of you but want to check first - not seen the job yet.
The pump is a wilo pump on a gravity fed system with a potterton boiler that keeps locking out. This pump is making a gurgling noise when the hot water is boosted, not when the CH is run. Is this...
Hi there,
Im trying to see if is possible to run a wet underfloor heating system and conventional rad circuit from a Vaillant 937 combi boiler, with a 430 weather compensator.
I have rung Vaillant and they recomend using the vr61, vr81, with other pipe sensors, a low loss header and a...
ian_black
Thread
boiler
central heating system
circuit
combi
header
ufh
under floor heating
underfloor
underfloor heating
vaillant
weather
Hi,
I've got a CWSC / Hot water cylinder, run on oil and my programmer has 2 on/off settings.
Trouble is that controls both hot water and heating.
Don't want to leave heating on constant as not there daytimes and not all rads have trv's
The thermostat is wireless and is a pain in the r5e...
Hutchey
Thread
circuit
dual
heating
honeywell
programmer
recommendation
water
Plumbed this up last week an having a problem with it, the gravity flow from the stove works fine, its just when the pump for the stove kicks in the return from the rads seems to go up through the coil instead of back to the stove, put a gate valve on the return link which helped but still not...
Japnut04
Thread
back boiler
boiler
circuit
injector
oil
plumbing
return
stove
works
Hi All,
My First post and new to plumbing and heating.
I’m looking for some technical advice regarding an Ideal Mexico Slimline RS 3/50.
I have an installation which currently uses a Gravity DHW and Pumped CH with all 4 tapping being used in the boiler. All pipework is 22mm and not...
j1cta
Thread
before
boiler
circuit
cylinder
dhw
gravity
ideal
mexico
water
can anyone clear this matter up for me,i was told of an electrician friend that all heating systems should have there own independent supply from consumer unit,i have and i'm sure many others have got the elec supply from a spur or even in some case put a 3 point plug 3amp fuse and away you go...
right ive got a problem after draining and filling a combi heating circuit to change a faulty rad valve.
ive never had an airlock before on combi systems, but anyway the problem is that after all rads bled, all work as normal apart from one on the ground floor which only gets luke warm...
kay-jay
Thread
18mm
air vent
airlock
bleeding
boiler
central heating system
circuit
combi
combi boiler
fitting
oil
primary
problem
pump
rad valve
screw
sealed
shower
sludge
tips
valve
vent
work
Hi all
Can anyone help?
My boiler: Ideal C24/C28 mini HE. 3 years old. Draining the system down to add the rad, the water was nice and clear though we are in a hard water area.
3/4 days ago a gas safe plumber extended my gas feed to my kitchen for a new range and extended the central...
capitanpugwash
Thread
after
boiler
boiling
central
central heating system
circuit
dhw
diy
filter
flow
gas
gas boiler
gas safe
hot
ideal
kitchen
lights
noise
parts
pipe
plumber
plumbing
primary
safe
shower
system
tap
temp
temperature
water
work
Hello, I've just replaced an oil-fired range with a wood burning range. I have installed a gravity circuit in accordance with the maker's spec. I have water flowing very nicely around the circuit, however, it is returning through the cold water feed rather than the gravity return as the heated...
Edgy
Thread
advice
appreciated
central
circuit
cistern
cylinder
expansion
fitting
flow
google
gravity
head
heating
high
hot
hot water
indirect
install
issue
oil
pipes
pump
rayburn
system
vent
water
I have been plumbing mainly on bathrooms for sometime, and lack experience in heating systems. I am hoping someone can help me out.
I am working on a boilermate 2 thermal storage cylinder. There was a leak from the vent pipe between the top of the cylinder and the header tank. I drained...
IST
Thread
circuit
circulating
cold
cylinder
flow
header
header tank
heating
hot
hot water
leak
no hot water
pipe
pipes
plumbing
primary
problems
pump
pump problems
tank
taps
thermal
vent
water
Recently installed wood burning stove - gravity fed indirect cylinder and pumped radiator circuit. Once the flow pipe from the boiler gets too hot to touch on most occasions the stove boiler starts hissing and the return pipe is always luke warm. To get around this problem we activate the pump...
jgray
Thread
air
boiler
burning
circuit
circulation
cylinder
fitting
flow
gravity
high
hot
hot water
indirect
leak
pipe
pipes
plumber
plumbing
problem
radiator
stove
system
vent
water
web
work
anyone seen these? we went on a course for fault finding and commissioning and were given a card that you insert into the block connector for pcb, instead of using the pins off your multi meter on the block you then use it on little holes on the card which is labelled for the different...
Friend of mine wants to install wet underfloor heating in an extension. He has a "normal" boiler and radiators.
Can this be done?
Is it economic?
He's been told that he can have a separate zone and thermostat. Will the boiler cycle a lot if this is the only zone active? I'm assuming...
SmogLee
Thread
boiler
central heating system
circuit
eco
install
mixer
radiator
radiators
system
trv
ufh
under floor heating
underfloor
underfloor heating
Hi there. I've got Saunier Duval boiler. It shows that the falt with the air and gas circuits have been detected. I've checked the fan (OK), air switch (OK), also replaced ignition P.C.B, still nothing
Any ideas? Help!
gredas
Thread
air
boiler
circuit
default
gas
ignition
switch
time
One of my customers has a standard vented hot water and heating system. The boiler is oil fired, the pump is on the return to the bolier and it has a 3 way diverter valve with normal controller, room stat, cylinder stat etc.
When the hot water or the central heating or both are called for the...
Brooksie
Thread
banging
blockage
boiler
boiling
central
central heating system
circuit
cold
cylinder
diverter valve
expansion
flush
hot
hot water
oil
overflowing
pipe
power
primary
pump
system
tank
taps
test
valve
water
work
People talk about how their bathroom radiator or heated towel rail is plumbed into the hot water rather than the central heating circuit. This means when the central heating is off the radiator can still get hot (to dry towels etc).
How is this achieved?
Does the radiator have to be plumbed...
Brooksie
Thread
bathroom
bathroom radiator
boiler
building
central
central heating system
circuit
control
flow
head
heated
hot
hot water
plumbed
price
radiator
rail
soil
supply
system
tee
text
towel
towel rail
travel
trv
valves
water
I have what appears to be a conventional central heating system, heated through a Potterton Prima Gas Boiler. The pump feeds into a 3 port divert valve feeding rads and hot water tank. There is a bypass between the pump and the valve.
The system is vented on the feed from the boiler and the...
mesmerised
Thread
boiler
bypass
central
central heating system
circuit
cold
divert
flow
function
gas
gas boiler
hot
hot water
plumbers
potterton
problem
pump
system
tank
thermostatic
valve
valves
water
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