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  1. #1
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    A bit of advice needed with water heater

    I have bought and just had installed a MEX multi point hot water shower.....

    Buy Mex Water Heater 9500W (MH9500SP) - invadeit.co.th

    Now the guy that has put it in says it is knackered (hard to believe as it is brand new) and i should take it back to HomePro BUT i have just noticed that he didn't add a water volume adjuster to the inlet pipe.

    Before i head to HomePro and make a cock of myself, does the heater need a water volume adjuster?

    Cheers

    TTS

  2. #2
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    Also thinking that he has only fitted a 32 AMP fuse in the fuse box.... what should i use for a 9500 Watt shower?

  3. #3
    Have you got any cheese Thetyim's Avatar
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    ^
    Fuse is too small.
    The heater will draw over 40 amps.

  4. #4
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    I know they need a minimum amount of pressure to operate.
    Probably have a maximum pressure to prevent damage.
    What is your water pressure?

  5. #5
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    Thanks, just been reading that the Amps should be around 40 - 45 Amps and the wire used should be 10mm.

    As for the pressure, the heater is fitted above the ceiling in our nearly finished bungalow and we have a 150 Watt Hitachi water pump that is brand new... pressure is fine.

    So should i bother with taking the fcuking thing back or just buy a bigger fuse and wire?

    And these guys fitting the thing are the experts..... Scary

  6. #6
    Have you got any cheese Thetyim's Avatar
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    Quote Originally Posted by Thungsongsausage
    says it is knackered
    What is the problem ?

  7. #7
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    Quote Originally Posted by Thungsongsausage View Post
    Thanks, just been reading that the Amps should be around 40 - 45 Amps and the wire used should be 10mm.

    As for the pressure, the heater is fitted above the ceiling in our nearly finished bungalow and we have a 150 Watt Hitachi water pump that is brand new... pressure is fine.

    So should i bother with taking the fcuking thing back or just buy a bigger fuse and wire?

    And these guys fitting the thing are the experts..... Scary
    Did the fuse trip?
    What exactly is the heater doing (or not doing)?

  8. #8
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    Quote Originally Posted by Thetyim View Post
    Quote Originally Posted by Thungsongsausage
    says it is knackered
    What is the problem ?
    Power is on showing that there is power going into the heater BUT it has 3 settings LOW, MEDIUM and HIGH, when you try to push any of the other buttons there is a beeping sound and nothing happens.

  9. #9
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    Quote Originally Posted by Necron99 View Post
    Quote Originally Posted by Thungsongsausage View Post
    Thanks, just been reading that the Amps should be around 40 - 45 Amps and the wire used should be 10mm.

    As for the pressure, the heater is fitted above the ceiling in our nearly finished bungalow and we have a 150 Watt Hitachi water pump that is brand new... pressure is fine.

    So should i bother with taking the fcuking thing back or just buy a bigger fuse and wire?

    And these guys fitting the thing are the experts..... Scary
    Did the fuse trip?
    What exactly is the heater doing (or not doing)?
    Fuse didn't trip... and the heater is doing feck all.

  10. #10
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    This off the website (Don't quite understand it)

    - Multi-point water heater 9500 watts, the Reynolds-quality high
    - a large copper kettle. To maintain a constant water temperature. 0.7 mm thick and made ​​of copper for durability
    - Thermo coastal in design to the boiler. Detect abnormal temperature fault normal fast fast
    - the new version TRUBINE FLOW SENSOR to detect the flow of water range and accuracy. Work under pressure. And safer.
    - PCB - ELCB high quality cut on the leakage is 15 mA within 0.1 second
    - adjust the heat level 3 LOW-MEDIUM-HIGH.
    - The valve water level of the water. have
    - two-year warranty and ensures high quality boiler fifth year
    - 9500 Watt, 220V, 50Hz.
    Last edited by Thungsongsausage; 19-02-2013 at 11:15 AM.

  11. #11
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    So 9500 Watt / 220V = 43.18

    So the 43.18 = the number of Amps i need in the fuse.

    Learn something new everyday...

    Also the wire for 9500 Watt should be 10mm as following the UK.

  12. #12
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    Well that's the sort of behavior I would expect from no pressure.
    If power were the problem it would have tripped the fuse I would have thought.
    Have you turnd the tap on?

  13. #13
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    Quote Originally Posted by Necron99 View Post
    Well that's the sort of behavior I would expect from no pressure.
    If power were the problem it would have tripped the fuse I would have thought.
    Have you turnd the tap on?
    Water pressure is fine, we have put one of those 'Rain showers' in the bathroom and the pressure is fine to run that.

    I would have thought the same regarding tripping the fuse, stumped there.

  14. #14
    Lord of Swine
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    And you say he has put no tap in between the pipe coming from your pump/pressure tank and the heater unit. Just plumbed straight in?

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    call HomePro and tell them what he said

    they will send an engineer round to see what the problem is

    our local one did, and he took it away for three weeks and got it fixed

  16. #16
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    Quote Originally Posted by Necron99 View Post
    And you say he has put no tap in between the pipe coming from your pump/pressure tank and the heater unit. Just plumbed straight in?
    That is correct, the heater is above the ceiling and water comes straight from the tank into the heater WITHOUT a tap connecting it.

  17. #17
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    Google'd 'Mex" to see where it is manufactured: never stated.

    Bring it back, let the the importer sort it out. To not do so invites potential electrocution.

    Stick with Japanese or German.

  18. #18
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    Quote Originally Posted by DrAndy View Post
    call HomePro and tell them what he said

    they will send an engineer round to see what the problem is

    our local one did, and he took it away for three weeks and got it fixed
    Will get them to change the fuse, wire and maybe connect a tap first then might have to do that.

    It is brand new and never been used and as the house is basically finished i don't want to have to wait a few weeks for them to fix it (Living with the in-laws at the moment and the fun is worn off a long time ago).

  19. #19
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    Quote Originally Posted by Thungsongsausage View Post
    Quote Originally Posted by Necron99 View Post
    And you say he has put no tap in between the pipe coming from your pump/pressure tank and the heater unit. Just plumbed straight in?
    That is correct, the heater is above the ceiling and water comes straight from the tank into the heater WITHOUT a tap connecting it.
    Suggest you put a valve in there in case you want to remove the heater or isolate the heater from the water source.

    Do you have flow out of the heater at all? If not, perhaps "vapor locked?" Bleed the air trapped off?

  20. #20
    Lord of Swine
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    ^ That's what i was thinking. He says he has pressure, but he doesn't really know if its getting to the heater.

  21. #21
    Have you got any cheese Thetyim's Avatar
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    Check the water pipes to see if the inlet and outlet have been confused.

  22. #22
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    My suggestion for what its worth. These water heaters lethal in this country, the combination of high current electricity, water, lack of earth and mai ben rai.

    Get rid of it, two reasons

    Its made by an unknown manufacture in an unknown country. You really really want to buy this kind of device from a manufacturer which a reputation for having the knowledge and resources to manufacture something thats safe, and a reputation they might actually care about. that means mainstream Japanese, european or north american manufactures.

    the water heater looks like it regulates the amount of power going into the heater. this means that the water temperature will change as the amount of water going though the heater changes. Its more pleasant to have a heater, that monitors the temperature of the water, and changes the power going into the heater as the water flow changes. these cost more.

    Its critically important that its connected to real earth, and one that is not simply bolted to the wall (this does happen). Although these devices are fitted with a RCD, you should and depending upon the circumstances may be required to gave a second one outside the wet area.... The obvious thing to do is to use an trip fitted with an RCD at the fuse box.

  23. #23
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    Quote Originally Posted by Thungsongsausage View Post
    So 9500 Watt / 220V = 43.18

    So the 43.18 = the number of Amps i need in the fuse.

    Learn something new everyday...

    Also the wire for 9500 Watt should be 10mm as following the UK.
    Thats weird, me and my wife live together with her sister in law, husband and 2 children. We have 15A and airco + 6500W heater, 15A shouldn't be enough but it is?!

  24. #24
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    My water heaters are independently operated in either cold water flow or hot on selection. Most of the year, say 11 months or more I never use hot water.

    Good for washing dishes and clothes however, but not really necessary.

    My stand alone heaters have been in service for 9 years now without replacement or any malfunctions. Simply optional equipment in my opinion, but then I don't live up in the mountains or far north.

  25. #25
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    Quote Originally Posted by ltnt View Post
    Quote Originally Posted by Thungsongsausage View Post
    Quote Originally Posted by Necron99 View Post
    And you say he has put no tap in between the pipe coming from your pump/pressure tank and the heater unit. Just plumbed straight in?
    That is correct, the heater is above the ceiling and water comes straight from the tank into the heater WITHOUT a tap connecting it.
    Suggest you put a valve in there in case you want to remove the heater or isolate the heater from the water source.

    Do you have flow out of the heater at all? If not, perhaps "vapor locked?" Bleed the air trapped off?
    I will attach a valve so i can remove the heater in future, the flow from the shower that is coming directly from the water heater is strong JUST not hot.

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