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power
A power supply is an electrical device that supplies electric power to an electrical load. The main purpose of a power supply is to convert electric current from a source to the correct voltage, current, and frequency to power the load. As a result, power supplies are sometimes referred to as electric power converters. Some power supplies are separate standalone pieces of equipment, while others are built into the load appliances that they power. Examples of the latter include power supplies found in desktop computers and consumer electronics devices. Other functions that power supplies may perform include limiting the current drawn by the load to safe levels, shutting off the current in the event of an electrical fault, power conditioning to prevent electronic noise or voltage surges on the input from reaching the load, power-factor correction, and storing energy so it can continue to power the load in the event of a temporary interruption in the source power (uninterruptible power supply).
All power supplies have a power input connection, which receives energy in the form of electric current from a source, and one or more power output or rail connections that deliver current to the load. The source power may come from the electric power grid, such as an electrical outlet, energy storage devices such as batteries or fuel cells, generators or alternators, solar power converters, or another power supply. The input and output are usually hardwired circuit connections, though some power supplies employ wireless energy transfer to power their loads without wired connections. Some power supplies have other types of inputs and outputs as well, for functions such as external monitoring and control.
When fitting a whole house pump with break tank, I tee on the water main after the pump ( with a stop tap and double check valve). This enables the customer to still get water if there is a power cut.
Does anyone know of a normally closed valve, that will open on power failure, so this can be...
Hi guys,
I know this may have been covered previously but I would really appreciate any advice.
We currnly have a Glow Worm 38cxi combi boiler. We have 2 bathrooms in the house, oneupstairs and one downstairs, both have 8.5kw showers, and have poor power tosay the least. We are now a growing...
jui
Thread
boiler
combi
combi boiler
oil
power
shower
showers
Hi all,
Just a bit of advice re this boiler.
Customer called to say no lights or operation at all in any mode.
Visited about 8pm on way back from other work and tested. power coming through to boiler but iaw instructions checking with multimeter nothing on the pins which led me to diagnose...
To date, I've only done a couple flushes on sealed systems on a single floor.
And to be honest, I was given a pump and told, go power flush this property and I had no idea what to do :/
So on the way to the job I googled it and did it as best I could. In a nutshell, drained a rad, connected...
So I've just ordered an Anton Flowclean Plus - which the specs say has a much higher flow rate than others and only for £780 including a plate heat exchanger adapter and hose extension kit.
Anyway, my question is: what are the best chemicals to use? I've used fernox but it really froths up -...
As the title says I've got a Mynute 25HE which has is not working and has no lights on on the front panel.
Power is getting to the timer ok just nothing seems to work on the boiler
Is this likely to be a circuit board problem or could I be lucky and there be an internal fuse?
Good afternoon!
This is my first post here, and looking at other threads it seems that you're a helpful, friendly bunch!
My house was built in 1976 and I have problems with the rubbish copper piping that was used in those days. Three years ago, there was a leak under the kitchen floor (over...
I've now had several quotes from company reps for my replacement boiler. All of the installers say that my system needs to be flushed prior to installation of the new boiler (chemical or power I'm not debating on the type of flush).
I've been told that if my boiler has a problem within the...
Hi all,
I am not a plumber, I just come here for advice and tips as a customer of professional plumbers.
I need to replace my power shower unit, but upon investigation it seems that my power shower was plumbed with the cold feed coming from the mains opposed to the cold water tank.
Am I right...
Hi Forum,
I had a quick question about a house I've recently moved into. It's around 15 years old and I've noticed that the radiators in the house are full of cold spots, rust and even a couple of pin hole leaks (i.e. probably not looked after very well). I'm going to systematically replace...
Hi all on the forum I don't know if this is the right place to post this but any help would be brilliant.
I have a problem with a Ferroli f30 combi boiler where there is power getting to the pcb but nothing coming out , there are no lights coming on at all no fan pump its all dead? As I say I...
My first post on here,
Been to a breakdown coil/solenoid not opening pump.
Tested not power to coil.
Tested coil lead, OK.
Tested photocell faulty replaced.
Still no power at coil.
Changed control box with newer 830.3 from a 830b still nothing.
Getting a replacement...
Just seen someone advertising a power flush (max 10 rads) for £350 - 10% so £315. Seems a bit cheap to me.
I have never done a power flush so can't say if that is a decent price or not. What do you guys charge, is that a reasonable price to charge?
Just asking out of interest really
I went to a job (y-plan system) where all the stats, motorised valve & the 2 channel prog were dead. The wiring centre was dead too but the spur (where the wiring centre took its perm live) was live giving 235v. I had to leave without fixing it. Anyone had this before? Any advice on what I could...
We have a Vaillant EcoTech Pro 28 combi boiler and today our power was out for over an hour while I was at work (we were having work done).
I'm wondering if any of the settings on the Vaillant would need adjusted? I have the heating controlled via a wireless controller and it has come on as...
gr1980
Thread
after
checked
power
pro
pro 28
settings
vaillant
water
I'm about to buy this model,
can an anybody tell perhaps of experience if this machine is strong enough to flush easily up to 10 rads ?
Is the machine efficient enough ?
Would like like to know your opinion...
Hello
My Gainsborough PS1200 has given up the ghost so i'm on the look out for a replacement.
This may be a silly question but Do I need to call a plumber, a sparky or ..... both?
Cheers
Was at a job yesterday with heating engineer just helping
Fitted new rad, filled system up again, no rads getting hot, air, bled pump, making noise, after an hour couple rads getting warm, air vent in loft opened, no air or water coming out.
He said there's a blocked pipe!
How will this be...
I got a power flush booked in and they have a back boiler, they have no idea of the make or age or even if has ever been serviced.
is there anything I need to no about flushing them? Or just crack on as per normal?
I use a fernox powerflow with magnetic filter and usually f5
tommy1712
Thread
about
back boiler
boiler
crack
flushing
oil
power
scale
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