E
ed-ectrician
Hi there,
I'm scratching my head on this one. Client has a wireless radio transmitter thing next to their meter which sends a signal at 2330 to the main meter (two dials - one for economy7/off peak one for on peak/normal) to turn on economy 7 and then off again at 0630. Side note: apparently radio 4 sends this radio transmission out every night and morning! Pretty nifty huh?!
They are complaining that the immersion heater is cold every morning so economy 7 not kicking in I think, or a wiring fault. Put the economy 7 load side cables into supply of the boost FCU (there are two FCUs - one for boost one for off peak/economy7) and hey presto it works. also did continuity on both the elements and they both came up with 19 ohms each so elements intact. so it would seem that the problem is between economy7 FCU and main intake. I tested between the breaker that controls the economy7 heating and the economy7 FCU and there is continuity there live and neutral. Did continuity of cpc and IR tests too on the economy7 bit of the board just becasue i could! Both fine. The economy7 breakers are not RCD protected so no danger of that tripping out, anohter thing ruled out!
There is also an on/off switch on the radio transmitter by the meter that, when turned on (it was off) seems to override the transmittter and kicks the economy7 loads both on. i know this becasue i switched it on and tested for voltage between economy7 element intakes. Also when i turned it on the meter started spinning loads - prob becasue of the extra load in the water heater right?!
Ok maybe i did too many tests but wanted to be sure the immersion worked ok!
Next thing to do is go round there betwee 2330 and 0630 and seeing if, with the override switch off on the transmitter, there is 230 between live and neutral on the immersion heater's economy7 element.
Am i missing something glaringly obvious?!
I feel like I said eceonomy7 about a million times haha!
Thanks everyone
Ed
I'm scratching my head on this one. Client has a wireless radio transmitter thing next to their meter which sends a signal at 2330 to the main meter (two dials - one for economy7/off peak one for on peak/normal) to turn on economy 7 and then off again at 0630. Side note: apparently radio 4 sends this radio transmission out every night and morning! Pretty nifty huh?!
They are complaining that the immersion heater is cold every morning so economy 7 not kicking in I think, or a wiring fault. Put the economy 7 load side cables into supply of the boost FCU (there are two FCUs - one for boost one for off peak/economy7) and hey presto it works. also did continuity on both the elements and they both came up with 19 ohms each so elements intact. so it would seem that the problem is between economy7 FCU and main intake. I tested between the breaker that controls the economy7 heating and the economy7 FCU and there is continuity there live and neutral. Did continuity of cpc and IR tests too on the economy7 bit of the board just becasue i could! Both fine. The economy7 breakers are not RCD protected so no danger of that tripping out, anohter thing ruled out!
There is also an on/off switch on the radio transmitter by the meter that, when turned on (it was off) seems to override the transmittter and kicks the economy7 loads both on. i know this becasue i switched it on and tested for voltage between economy7 element intakes. Also when i turned it on the meter started spinning loads - prob becasue of the extra load in the water heater right?!
Ok maybe i did too many tests but wanted to be sure the immersion worked ok!
Next thing to do is go round there betwee 2330 and 0630 and seeing if, with the override switch off on the transmitter, there is 230 between live and neutral on the immersion heater's economy7 element.
Am i missing something glaringly obvious?!
I feel like I said eceonomy7 about a million times haha!
Thanks everyone
Ed