how to connect light indicator

Discussion in 'General Electronics Chat' started by rajesh, Oct 30, 2012.

  1. rajesh

    rajesh

    Joined:
    Oct 30, 2012
    Messages:
    5
    I have a electric water heater (geyser) in India, but the two light indicator(one for power and other for heating) are burnt out and they were therefore removed and the wire were black taped.

    Those indicator connecting wire were placed parallel.

    I want to put back the indicator with neon lamp indicator but since they were removed I couldn't know if there were any resistor connected with the indicator.

    Can I use any neon lamp indicator and appropriate resistor.

    If I am right, the parallel connection will increase the current through the load(water heater).

    So how to connect the indicator and resistor.


    Water heater specification

    230 v, 50 hz
    input 2kw , capacity - 15 lit



    Thanks.

    Attached Files:

    rajesh, Oct 30, 2012
    #1
    1. Advertising

  2. rajesh

    duke37 VIP Member

    Joined:
    Jan 9, 2011
    Messages:
    2,752
    Location:
    Derbyshire. UK
    Neon indicators usually go black rather than burn out.

    The small neon bulbs need a resistor in series, 270k or so. The higher the resistance, the less light but the longer they will last.
    Some neon bulbs come with a resistor built in, these will be labelled 250V.
    One should be connected across the power input and the other across the heater.

    The power consumption of the neons is minimal and will not affect the operation.
    duke37, Oct 30, 2012
    #2
    1. Advertising

  3. rajesh

    rajesh

    Joined:
    Oct 30, 2012
    Messages:
    5
    Thanks for the reply.

    I used a small neon bulb that has built in resistor of 82k in series(i checked with multimeter, color gray-red-orange) across the power input. But it didn't glow. I had checked the wire hanging across the power input for connectivity also. The light glows well when I put directly on the wall-plug.

    Whats wrong, should i remove the resistor, or what resistor should i use.
    rajesh, Nov 1, 2012
    #3
  4. rajesh

    duke37 VIP Member

    Joined:
    Jan 9, 2011
    Messages:
    2,752
    Location:
    Derbyshire. UK
    You should not remove the resistor and if the bulb is designed for the voltage that you have the value should be OK. If you have bought a bulb for 110V, then the resistor should be at least doubled.

    If the bulb lights when connected directly to the mains, it is working. If it does not light elsewhere, then it is either not connected properly or there is no power there.

    A neon needs about 90V to strike.
    duke37, Nov 1, 2012
    #4
  5. rajesh

    rajesh

    Joined:
    Oct 30, 2012
    Messages:
    5
    I have attached the connection.

    I don't know I am not getting current at D, when the geyser is on. But the water is heating. I am getting current at C when it is heating and no current when the heating is off.

    I have connected power indicator at G & H and thermostat heating indicator at C & D and I do not get any light indication.


    I am connecting neon indicator and resistor (82K) in series. Power supply is 220 V.

    Thanks.

    Attached Files:

    rajesh, Nov 5, 2012
    #5
  6. rajesh

    duke37 VIP Member

    Joined:
    Jan 9, 2011
    Messages:
    2,752
    Location:
    Derbyshire. UK
    Power in, Fand G
    Heater on F and E

    The thermal overload has a wire going in and nothing comming out. Does the heater work?
    duke37, Nov 5, 2012
    #6
  7. rajesh

    rajesh

    Joined:
    Oct 30, 2012
    Messages:
    5
    Thanks you very much for the reply.

    Now, the heater is not working at all. It showing no current at C, sometimes it show but for few moments only, I suspect the temp regulator set to low as I have tempered it many times while removing & fitting the cover. I corrected but now its showing no current at all.

    I had to call the service center, lets see.
    rajesh, Nov 7, 2012
    #7
  8. rajesh

    rajesh

    Joined:
    Oct 30, 2012
    Messages:
    5
    For the indicator light it has wires at G&H and C& D only.
    rajesh, Nov 7, 2012
    #8
    1. Advertising

Want to reply to this thread or ask your own question?

It takes just 2 minutes to sign up (and it's free!). Just click the sign up button to choose a username and then you can ask your own questions on the forum.
Similar Threads
  1. mikem3

    12 volt indicator light

    mikem3, May 22, 2006, in forum: Electronic Design
    Replies:
    1
    Views:
    397
    John Fields
    May 22, 2006
  2. Keith

    Strobe light phone indicator

    Keith, Feb 21, 2004, in forum: Electronic Equipment
    Replies:
    3
    Views:
    265
    Watson A.Name - \Watt Sun, the Dark Remover\
    Feb 29, 2004
  3. M.Joshi

    Light switch warning indicator

    M.Joshi, Dec 28, 2005, in forum: Electronic Repair
    Replies:
    27
    Views:
    617
    Dave Plowman (News)
    Jan 5, 2006
  4. Impmon

    EPROM eraser- light on indicator?

    Impmon, Nov 1, 2006, in forum: Misc Electronics
    Replies:
    3
    Views:
    388
    Baron
    Nov 1, 2006
  5. Ted Swirsky

    Where to find a few 120V indicator indicator lights?

    Ted Swirsky, Apr 18, 2006, in forum: Beginner Electronics
    Replies:
    5
    Views:
    1,649
    petrus bitbyter
    Apr 21, 2006
Loading...

Share This Page