DM2

[Sneill]

Hi guys 

I am assisting a mate onboard his newly acquired boat which is running a DM2 engine. Is it normal for a pair of water pipes to be connected from the engine to the circulation pipes that run from his Multi fuel burner with back boiler to his Calorifier ? This is in addition to two more smaller pipes that run from the engine to the coil of the calorifier. Your assistance as always greatly appreciated 

Tia

[matty40s]

It is not unusual, and would depend on who designed the system and what the requirements were for heating/cooling as to why this configuration exists in this boat.

 

[Sneill]

Would you know if this set up would be pumped or just working on convection?

[MtB]

8 hours ago, Sneill said:

Would you know if this set up would be pumped or just working on convection?

 

Well there must be a water pump on the DM2, so yes, pumped. I doubt the water would circulate around this circuit by natural convection. The stove-to-calorifier circuit could be either. 

 

Is there a problem or a fault you are trying to solve? 

 

 

 

Edited November 3, 2022 by MtB
Add a bit.

[PaulJ]

Does it also have any valves/ diverters to a skin tank?

It could also possibly have an additional pump if the pipework is long or convoluted. I can think of at least one boat I have come across setup like this.

As Matty40s says its all down to the who and why- heres an example of a system on a boat I was on recently. Luckily the seller had left a good set of instructions!

 

Edited November 3, 2022 by PaulJ
Picture gone strange

[David Mack]

44 minutes ago, PaulJ said:

Luckily the seller had left a good set of instructions!

But has never thought of labels!

[PaulJ]

Just now, David Mack said:

But has never thought of labels!

Nor simplicity 😀

[alan_fincher]

1 hour ago, PaulJ said:

Does it also have any valves/ diverters to a skin tank?

It could also possibly have an additional pump if the pipework is long or convoluted. I can think of at least one boat I have come across setup like this.

As Matty40s says its all down to the who and why- heres an example of a system on a boat I was on recently. Luckily the seller had left a good set of instructions!

 

 

Worth owning shares in a fir that makes gate valves!

Almost unbelievable.... except obviously not!

[MtB]

1 hour ago, David Mack said:

But has never thought of labels!

 

Probably couldn't find enough!