Britony 80 combi boiler G31 propane, gas flow rate =0.124877 cubic meters per hour, inlet pressure 37mbar, room sealed flu Manufactures recommended Co2 & NFGT unknown, cold water from hot tap when boiler switches to hot water mode. Unsure if the problem is the diverter valve, flow switch, solenoid valves or thermistor

7 cubic meters /second = 7 X 60 /minute
= 7 X 60 X 60 / hour= 7 X 60 X 60 X 24= cubic meters per 24 hours or another way
7 X 86400 = cubic meters per 24 hours

your boiler needs a minimum gas pressure of 16 mb to light successfully. if your gas pipe has been extended it has to be able to flow enough gas. it may need upgrading to 28mm for even as little as a metre from the gas meter. if your central heating works ok when the fire is off then this is your problem

Gas meters are usually rated in cubic feet per minute (CFM) not BTU. there are 1027 BTU per cubic foot so do the math. Try the link below Btu rating on natural gas meter

A pulsing flame is a gas pressure problem. It shutting down is probably because the boiler thinks there is no flame when it goes low on the pulse and shuts the gas valve off. Listen to your pressure regulator and gas valve. If either is causing your problem, you will hear it. If so, smell the end of the vent line from it. If your diaphragm is leaking, you will smell it. I have specific questions but will throw a few general things out here for you. If you don't have a regulator outside of the gas valve, it is inside the gas valve. Try turning the supply pressure up or down a little. Remember where the screw is so you can put it back. Both under and over firing a furnace both have their own bad consequences, so don't adjust it too much either way. If it reacts to adjustment but still pulses, it is probably bad. Check the vent line for a gas smell. And of course, check all the electrical connections. Watch the pilot assembly when it shuts down to confirm why it is shutting down. Are you using natural gas from a city supply or propane? I'll check back here later to see if your still here. Hope it is already fixed though. Roger

this sounds like a central heating boiler rather than a computer. can you please post in the correct section where you'll get a meaningful response.

Water flow combi will only pass so much , unless there is a blockage in the water section on your boiler, or water inlet tap is not fully open .

But some combis do have poor flow through the heat exchanger .

Hi again ... Thanks for the Chat yesterday. Have you considered this article: http://www.directpoolsupplies.com.au/webcontent34.htm (click specifically on maintenance of your salt cell) There are lots of good tips here for the pool owner.

I see that this manufacturer wants 4000 ppm salt (4%) minimum to 7000 ppm salt (7%) maximum which is above the standard here in North America. You are in Australia? According to the manufacturer, your cell may be at the end of its life.

Sudden low filter pressure could be a broken lateral in a sand filter (you would probably have sand in the pool) or a hole in a paper filter (no indicator other than low pressure).

Here are some useful numbers for your 4 X 12 X 30 foot pool:

1440 cubic feet or 40.776259104 cu meters
1 cubic foot = 7.5 gallons or
1 cubic foot = 0.0283168466 cubic meters.
1 cubic meter = 264.172052 US gallons.
1 cubic meter = 1000 liters ( you probably know this stuff though)

I calculate your pool to be about 10800 gallons. The actual gallons per foot is really 7.48 (10771.2 in your pool) but we use 7.5 gallons per foot.

One inch in your pool is 225 gallons or 851.71765 L. This will give you some idea about what chemicals you may have to add with one inch of make up water.

If you were in NJ, and a commercial pool, you would have to have a a 8 hour turn over rate with a filter = 60 square feet and your flow rate would be about 22.5 gallons per minute.

Please keep your water balanced with the proper amount of Calcium (about 350 ppm) your pH at 7.4 - 7.6 your TA around 100 (80 min and 120 max) and your salt per manufacturer recommendation, in this case about 5000 ppm. Cyanuric acid around 80 ("Sun screen" for chlorine) and of course Cl around 3 to 4.

I hope you have found this information helpful. Enjoy your pool, while we shiver here in the North East.

Only the portable heaters that are manufactured to be used on dual fuel (nat gas/propane) can switch from one to another. If they are made for 1 type of gas only, they are not field serviceable and cannot be converted. Douglas

Steel wool is the way to clean. Hope this helps

sounds like youve topped the pressure up too much, the boiler needs to be on 1 bar pressure from a cold state, thats the max really you want to increase it too, in operation the boiler pressure increases due to heat expansion but sounds like you may have more of a problem, if your renting the property then its the landlords duty to ensure your boiler works and its safe- consult the landlord asap and they sohould help you out