Meggering/insulation testing combis

[LaMont5way]

Hi. I was wondering if any domestic gas service engineers out there megger/insulation test whilst diagnosing boilers or for electrical safety purposes. I have heard before it could damage the appliance but, a domestic boiler is no more sensitive than any other domestic electrical appliance e.g refrigeration, laundry. Any information would be greatly appreciated.

P.s I have already posted this and was told to register to receive advice, I have now done this. And to the person who asked if I would 'megger' a television and at what test voltage; mono 240v 50hz supply to appliance,so for the test you would double this to 500v. I didn't quite understand your question, but, were you suggesting I use a tester with a special I.T test function for boilers because they are like televisions,as opposed to the likes of the Fluke 1577? Cheers.

 

[kris]

Hi there LaMont5way and thanks for taking the time register, no we dont use meggers while diagnosing boilers , I have an analogue megger that goes up to 1000v jolt but i only use it when testing water heater element prongs for breaks or cracks etc, when im working on boilers i use my fluke 116 multifunction tester and my fluke T150 , although the 116 does all that needed ,

 

[Dotty]

Multimeter only. Boilers are voltage sensitive

 

[IDCHAPPY]

I'm a monkey, not a spark, if it gets 240v and doesn't move it's funked

 

[joni os]

Is that a technical term or a tipo.

 

[gasmanrob]

Stick a megger across a duotec board and you'll be dipping your digits in your pocket for a new one.

 

[LaMont5way]

Thanks for clearing that up. You would of thought a healthy transformer would be able to cope, but I know from experience in the event of any kind of surge in the supply modern boilers don't fair well. I still think this testing could prove beneficial for diagnosing certain faults like intermittent loom faults due to wiring shorts or even pumps ,fans. As long as you could test circuits/components separately from the pcb/pcb's, right? And thanks again guys.

 

[kris]

Thanks for clearing that up. You would of thought a healthy transformer would be able to cope, but I know from experience in the event of any kind of surge in the supply modern boilers don't fair well. I still think this testing could prove beneficial for diagnosing certain faults like intermittent loom faults due to wiring shorts or even pumps ,fans. As long as you could test circuits/components separately from the pcb/pcb's, right? And thanks again guys.

I know looms can go from time to time but mostly in my experience its a functioning part that goes and modern boilers now are easy enough to test the looms continuity with a multimeter, for easyness I do like my fluke t150

 

[gasmanrob]

If you could disconnect the board and components then as far as a theory goes it's a grand idea, however the reality of having a kit to suit every manufacturers wiring looms would cost the same as the tester itself thus making it un viable.

Perhaps a hvac specific unit with variable outputs, where you were able to split wiring looms and test 2 leads at a time might prove more practical but quite labour intensive, plus the added ache of getting into the pcb housing on something like a eurocombi or even a chaffataux, it's unlikely to take off or warrant the cost

 

[Dotty]

I know looms can go from time to time but mostly in my experience its a functioning part that goes and modern boilers now are easy enough to test the looms continuity with a multimeter, for easyness I do like my fluke t150

Nice bit of kit that. I just got one.