vaillant ecotec inlet pressure

[chris watkins]

Feel free to enlighten Mugwuffin, chris watkins

What & spoil all you gas guys fun no you can carry on. Tell him how he might not get the hot water production that the MI,s state for a start.
BTW Mugwuffin may not of heard of a "time burn on the appliance" thought it was normally called a Gas Rate Test on the appliance, is it not diamondgas ??

 

[diamondgas]

What & spoil all you gas guys fun no you can carry on. Tell him how he might not get the hot water production that the MI,s state for a start.
BTW Mugwuffin may not of heard of a "time burn on the appliance" thought it was normally called a Gas Rate Test on the appliance, is it not diamondgas ??

Once has an Isar p1 at 9mbar and gas rate 30kW No issue with the appliance, more with the cooker next to it It's important to have the correct pipe sizing so that the modern boilers don't suck the gas meter down the pipe, figuratively speaking, or starve other appliances!!!

 

[chris watkins]

Once has an Isar p1 at 9mbar and gas rate 30kW No issue with the appliance, more with the cooker next to it It's important to have the correct pipe sizing so that the modern boilers don't suck the gas meter down the pipe, figuratively speaking, or starve other appliances!!!

Thought the zero rated's only only had the very slightest effect on the inlet (0.5 at the most) or was it the type of valve on the Isar's ???

 

[diamondgas]

Thought the zero rated's only only had the very slightest effect on the inlet (0.5 at the most) or was it the type of valve on the Isar's ???

p1 is the inlet, p2 the outlet Chris, I think that's what you're thinking of maybe? You should have zero, thereabouts on p2 on the gas valve! The isar I was testing had been connected to an old 1/2" iron pipe that supplied a cooker as well as the boiler! Had to ID as the burner on the cooker went to a pip on low!!

 

[DirksPlumbing]

The mi's do state between 17-25mbar at gas valve p1. How they reckon 25mbar is okay is beyond me! I'd be a bit worried there

Well keep in mind that Vaillant is not a native manufacturer. In germany when you do your pipe sizing you calculate a pressure gain for every meter of height the pipe is rising. As NG is obviously lighter than air.
Which means every 25m height difference you gain 1 mbar of pressure.

My top reading at a (NG) meter yet is 41mbar. And it was only at first floor .

 

[stevetheplumber]

Well keep in mind that Vaillant is not a native manufacturer. In germany when you do your pipe sizing you calculate a pressure gain for every meter of height the pipe is rising. As NG is obviously lighter than air.
Which means every 25m height difference you gain 1 mbar of pressure.

My top reading at a (NG) meter yet is 41mbar. And it was only at first floor .

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[DirksPlumbing]

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What is your first step when your IP is above 22mbar?

Added: Or unexpected high/low anyway?

 

[AWheating]

What is your first step when your IP is above 22mbar?

Added: Or unexpected high/low anyway?

check your water level

 

[DirksPlumbing]

check your water level

Never! I instantly tell the customer the truth about the installer oversizing the pipe and causing that way a high IP .