ISE level sensor connectors

[Jumty]

The old level sensor has five terminals labelled (left to right): 1, 16, 11, 14 and 12. 17 is unpopulated. Unfortunately the replacement part has terminals numbered 11, 12, 13, 21, 22 and 23.

On the rear of the new sensor there is the following legend:

11-13/21-23
16(4)/250 30E3

11-12/21-22
10(4)250 30E3

11-14/21-24
2(1)250 10E3

Does anyone know the correct way to connect the wires to the new sensor?

[kwatt]

Re: ISE level sensor connectors

I’d trawled through all I have and there’s nothing on this.

What wires were on what connectors of the old one as usually it’s terminal to terminal number unless there’s a mod sheet with it?

K.

[Jumty]

Re: ISE level sensor connectors

On the original (EMZ) level sensor the teminals were aranged in a single block of five blades numbered 1,16,11,14 and 12. The block was shaped so that the wires could only be connected one way.

On the replacement (Metalflex) sensor the terminals are are arranged quite differently. On the LHS terminals 23, 21, and 12 and on the RHS 22, 11 and 13. The replacement unit came with a set of spade connectors and plastic sleeves.

[kwatt]

Re: ISE level sensor connectors

I’ve no clue what they’ve done there and I’ve no contact there any longer either, they moved all the tech support to Slovenia. 🙁

K.

[iadom]

Re: ISE level sensor connectors

The new switch sounds like an old style two level switch.

Terminals 11/12/13 is one two way switch, terminals 21/22/23 is the other two way switch.

You would need a basic circuit tester to decide which of the two sets of switches is the lower level by very gently blowing into the switch until you hear the first click. It should in theory be switch 11 to 12 normally closed, this should switch to 11 to 13 closed and 11 to 12 open when you hear the first click of the switch. From your old switch the cable from 11 should go to 11 on the new switch, the one on terminal 16 should go to 12 on the new switch and the one on 14 should go to 13 on the new switch.

This only leaves you to sort out the other side of the switch which is the overfill level. Getting these wrong will not cause any damage but looking at the wiring diagram for the 1406 the cable from the old switch terminal 12 should go to 23 on the new switch and the one on terminal 1 should go to 21.

[Jumty]

Re: ISE level sensor connectors

Iadom, many thanks. Actually I’d sat down and thought about the problem and realised how to resolve it. 11+12 is the lower level (one blow) and 21 + 22 the (two blows) upper level.

[Jumty]

Re: ISE level sensor connectors

All very straightforward with one slight problem. The WM has only four connecting wires not five. On the old pressure sensor terminals 11 and 1 are connected at their base by a metal strip.

[iadom]

Re: ISE level sensor connectors

That is what puzzled me as I thought at first you said you had five wires but you meant five terminals.

The wire to 11 on old switch should go to 11 on new switch, there is an internal link between 11 and 1 on new switch.

[Author]

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