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circulation
Print circulation is the average number of copies of a publication. Number of copies of a nonperiodical publication such as a book called usually print run. Circulation is not always the same as copies sold, often called paid circulation, since some issues are distributed without cost to the reader. Readership figures are usually higher than circulation figures because of the assumption that a typical copy is read by more than one person.
Print circulation is one of the principal factors used to set advertising rates. In many countries, circulations are audited by independent bodies such as the Audit Bureau of Circulations to assure advertisers that a given newspaper does reach the number of people claimed by the publisher. There are international open access directories such as Mondo Times, but these generally rely on numbers reported by newspapers themselves.
In many developed countries, print circulation is falling due to social and technological changes such as the availability of news on the internet. On the other hand, in some developing countries circulation is increasing as these factors are more than cancelled out by rising incomes, population, and literacy.
Hi Guys ,
Had a call from a customer whos oil boiler is not heating the cylinder properly and i dont know why so i would be glad of any advice .
Oil boiler with gravity 28mm primary to cyl and pumped to radiators . The boiler is working fine and rads work ok if needed...
Can anyone please recommend an "in line" circulation pump to improve hot water pressure in a house.
The pump will be required to provide hot water to four outlets only, (bath tap, sink tap and two basin taps). It's a gravity fed system and the pressure to the four hot water outlets is quite...
bit of advice pls, went to a ideal classic ff240 boiler fires for couple of mins then stops for a couple of mins then repeats cycled been like this for 4 months acording to customer ,replaced temp stat sensor as advised by ideal and boiler ran for 20 mins bfore starting to do it all again when...
duff
Thread
boiler
central heating system
circulation
classic
couple
cylinder
first
ideal
possible
problem
I want to fit this device to a 40kw solid fuel boiler.Schemat
It's a WZS-3 + One-way thermal release valve JBV - for boilers 34-70 kW supplied by Kotly.
It only seems to have one inlet and one outlet and their diagram shows it connected on the primary flow.
What happens when the pump fails...
Hi, I'm new to this forum, so hope I'm doing things correctly.
I have a problem with my heating system in my new house, which I have recently just moved into, and hoping someone can help me out.
Unfortunately I'm not from a plumbing background and thought it would be useful to post this on...
Hi, I have installed a Ground Source Heat Pump connected to a 120l accumulator in a renovation project.
The accumulator is in turn connected to the original radiators which are 2x oversize at 40C MWT with TRVs, utilising an Alpha 2 15/50 pump set to adaptive setting 2 (for rads)
There is a...
andyfen
Thread
accumulator
circulation
project
pump
pumps
renovation
should
system
underfloor
which
I would appreciate any help you can give with the following issue we have on our Baxi Potterton HE 115 Condensing boiler.
After approximately 10 minutes of the heating coming on and the burner lighting the fault code E03 appears and the burner light goes off.
The manual says that the flow...
Hi Guys
A customer called me out this week after having just turned on their CH, usual story rads not too hot. I've bled them and released a lot of air which did the trick, but not for long. The pump is working fine, The rads nearest the HW cylinder are constantly hot but as i follow them down...
Morning
We've just about got the new ecocent cylinder installed and the pipework adjusted and it all seems to be working really well with the exception of the secondary circulation.
I can understand how it works on a gravity system, but not on a pressurised system.
The house was originally...
vetinry
Thread
circulation
night
not working
secondary
steve
water
working
I have had ongoing problems with my boiler and no heat or hot water for 10 days now. I am a full time carer for my 90 year old disabled Father who is a dementia sufferer so things are getting a little dire and quite smelly too.
HISTORY
Local GS Engineer replaced gas valve and igniter pcb and...
Have fitted new gravity cylinder to old oil fired potterton boiler 15 years old approx.it has 1inch coil inside to match old.the old cylinder was repalced as leaking at seam.There was a pump added to the primary which was removed when fitting new cylinder as I was told this made no difference to...
napalm1967
Thread
boiler
central heating system
circulation
cylinder
gravity
primary
system
I have a problem with circulation, predominantly when we heat the water tank but it also occurs with the CH too.
When the water heating comes on, it will run for 10-15 minutes before a whining noise can be heard from the pump and then the boiler thermostat will cut in turning off the boiler.
I...
Will The Kamco CP2 Circulation pump adaptor fit a Bosch pump in a Worcester 24CDi Combi boiler.
This adapter is to use with a Kamco power flush machine and it goes onto the pump housing so that you do not have to remove the pump altogether.
Hi all just after a few opinions really ,about four years ago I plumbed out a small shower block and this included a sec/circ. About two months ago the owner of this place rings to say he has multiple pin holes in the copper just on this run. To cut a long story short the rep from the copper...
hi everyone. had a job to change all the radiators in a 3 bed semi, all changed ok, filled up downstairs ok, upstairs started and stopped 30 seconds later, thought ahead and cut and checked cold feed wasnt blocked when i drained down but was clear, cold feed is into the gravity hot water coil...
furniss567
Thread
blocked
circulation
problems
radiators
turned
upstairs
water
Hello all,
I've been struggling with the CH heating at home here since those freezing cold days before Christmas.
I've done quite a bit of plumbing and installed a few CH systems (a few years ago) so not a total novice.
The system here worked fine for 20 years. A new Ideal Mexico floor...
Main 12KW He regular boiler.
Lights indicate a circulation problem or a PC board.
System gets hot then cuts out after about 2mins, lights flash as above. then fires up and so on. The rads get hot and the house gets hot.
Because of this I suggest customer should call out her insurance...
Is anyone able to help I have a woodboiler stove to put in a garage to feed rads. the diagrams Ive seen are poor. Do you pump the water on cold or hot side what type of pump should I use. Do you fit a one way valve on the expansion tank feed pipe.:confused:
jubbsie
Thread
boiler
circulation
gravity
oil
radiator
radiators
should
My boiler switches on and off throughout the night, literally every 10 seconds or so .It keeps the rads hot though,is this normal.I don't use the clock at all,controlling it by the room thermostat ,keeping it on maximum.
joetheghost
Thread
bath
blockage
boiler
central heating system
circulation
drain
filter
fitting
gas
gas pressure
hot
parts
pressure
problem
pump
saunier
system
testing
work
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