Surfingboat
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Posts posted by Surfingboat
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2 hours ago, blackrose said:
Good, glad you solved it. I fitted an isolator on the T to my accumulator so that if I'm trying to identify whether the system is leaking I can isolate the accumulator and it makes it easier to listen for pump cycling.
One question from me: What are the low flame, high flame settings on the Morco boiler for? Presumably this doesn't affect the water temp as that is set by a different knob.
I am not sure. I know if i turn the dial to the high flame symbol, this would cause the pump to cut in and out until the accumalator was fitted. I am guessing it just heats the water to a higher temperature.
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The Accumulator did solve the problem. Thanks for all the help
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Thank you for all your replies. I am going to purchase an accumalator, i will report back in a week once it has arrived
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18 minutes ago, Mike the Boilerman said:
That accumulator is 8 litres. It will work fine but is far bigger than you need. 3 or 4 litres will be fine, and cheaper. Some need to be mounted vertically, others don't. I've never figured out why or which I'm afraid. Best to mount vertically with the Schrader valve at the top for easy access. It will need recharging periodically.
My expansion vessels are screwed into fittings like this, which are in turn, screwed to a horizontal plywood base.
Right on, i will look for a smaller one, and thanks for the link, very helpful
18 minutes ago, alan_fincher said:Yes, perfectly OK for it to be horizontal.
In my view best attached to wherever it tees of the cold pipe by a flexible tap connector of some type.
The connector to the accumulator is parallel threaded, so easiest way to make a seal is to use a tapo connector that incorporates a fibre or plastic washer.
Please don't ask how I know other methods don't work as reliably!
Hard to understand why if it is a standard type with a diaphragm?
Can't see how it can possibly make a difference?
Thanks for the reply, i am glad it can be positioned horizontally as I don't have a lot of room to fit it
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1 hour ago, Mike the Boilerman said:
Firstly this pump cycling needs to be fixed. Fitting a correctly pressured accumulator on the pump outlet will stop the pump cycling. I'd suggest an accumulator of about four or five litres in capacity, and make sure it is for potable water not for central heating. There is a loose colour coding convention that white or blue = potable water and red = central heating but manus don't all conform to this. I've seen silver/grey accumulators recently that can be either and white that are CH.
Secondly I'm not convinced the burners dropping in and out is a direct result of the cycling. All three of mine do this too if the flow rate through them is too low and the tank water slightly warm (e.g. in summer heatwave) and the flame size control knob is set to "High", and I have accumulators! I think there is some sort of mechanical overheat protection built into the Morcos coming into operation. Try running yours on "low flame" instead of "high flame".
Try all this with the Morco temp control set to Max. Turning the temp control down misleads the user as it appears to simply bleed some cold water into the already possibly overheated heated output from the Morco.
Thank you Boilerman, for the detailed reply. I am going to try what you suggested in your post today and will report back with the results later this afternoon. This is the current portable water accumalator I have saved on my ebay watch list
But, can this be positioned horizontally? Do you know? I have seen this adaptable pipe work which makes it look like it is T'eed off the water outlet after the pump.
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9 hours ago, blackrose said:
Yes, you probably just need an accumulator tank. Many boats have them fitted to help with pump cycling even though they don't have instant gas water heaters.
I have the same water heater, a Parmax 3 pump and an accumulator fitted just after the pump and the heater works fine.
Thank you Blackrose, I will purchase an accumulator tank then
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Hi, I have a Morco 61B boiler that is fed with water via a Shurflow 30 PSI (2 bar) diaphragm pump. The boiler requires a minimum of 1 Bar before the gas valve opens and it will start to heat any water fed to it and I have a 2 bar pump feeding it.
When the boiler ignites and starts to heat the water, the pump starts to cycle (turn on/turn off rapidly), this causes the water to go cold then hot as the pressure to the boiler drops in and out and the boiler keeps igniting/shutting down. I cannot get a steady flow of hot water. If I open the cold tap, the pump stops cycling and the pressure and flow of water is good, except the water is now cold/luke warm.
If I turn down the the temperature dial on the boiler, i can get a constant supply of warm water to the sink, but not the shower, and at a very slow flow rate. If I try to increase the temperature dial on the boiler, the pumps starts to cycle again and the boiler cuts out and reignites with each cycle. The problem seems to relate to increasing the temperature on the boiler, i can get cold and luke warm water with ease :)
I have checked the flow rate and it is 6 litres per minute as specified on the Morco website.
Does anyone have any pointers? I have been looking at fitting a FIAMMA A20 Expansion Tank - Accumulator Tank.
Thank you (off to bed now but will see any replies on Sunday)
Morco 61B and Hot water to Shower
in Boat Equipment
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Thank you Ex Bummie, I did not know what the dials did exactly, so that thanks for explaining.