Hi,

I have obtained a central heating water pump with its external wiring
damaged. The damage is minimal, its the small box on the side of the
pump which has been wrenched off, the small box contains a capacitor
and a small rotary switch labelled 1,2,3.
I have the small plastic box which was attached to the side of the
pump, and although it is a little damaged the capacitor looks Ok, and
the small rotary switch looks Ok. The screw holes are damaged but the
connecting wires are not damaged.

The connecting wires were attached with baby spade connectors, these
have pulled away without any damage.

Unfortunately there are six of them, and i don't know where they go.

Well, i know they go back to the six spade connections, but i don't
know which goes where.

I want to put this unit back into working order, so i will need some
help to try and figure out how the pump windings are connected.

Briefly:
Six wires coming from the pump/motor appear to be from three windings.
One of about 180 Ohms, and two of about 70 Ohms.
The windings are electrically independant of each other.
The capacitor is (i think) 2.5 Mfd, 1000 V. Wkg.

It is my guess that the higher impedance winding would be the shadow
and would go in series with the capacitor, unless someone thinks
otherwise ... ...

And that the two lower impedance windings would go to the switch to
be the 1,2,3 settings.
Presumably high medium and low.

The unit is only for 240 V mains, the windings are not for supply
voltage such as 110.

I will try to get some photos up and posted and maybe someone will
actually recognise the unit ... you never know.

Any help in sorting out these six wires would be much appreciated,
Regards, John

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Sounds like a pump that is fitted in lots of domestic heating systems.

As you suggest, post a picture or some of the detail, (eg, make and model) and mabye we can compare, like for like.

 

It's a heating pump alright.

The capacitor is a motor run capacitor, it goes in series with the start winding which is difficult to know without the datasheet.

I take it that you're in a 110V area, well it's desinged to be connected between the two hots on a split phase system.

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Hi Joe McGiver, Hi Hero999,

Joe, yes it is indeed a pump that is fitted into many domestic heating
systems.
I have taken a few photos, and i will try to post them here.
It is a Celsia Multi-head made by Potterton, i have not managed to
find any details on the internet yet.

Hero, yes it's a central heating pump alright. I removed it from the
discarded system myself. The capacitor is supposed to go in series
with one of the three windings, to provide phase shift for starting
and running the motor.

I'm not in a 110 volt area, the unit is made for 240 volts, and i
think the two lower impedance windings are for the 'Multi-head'
control, which are marked 1, 2, and 3.
How this is achieved i don't know, so far i am just guessing.

**************

The switch part seems very simple, just a three way rotary with one
common. Doesn't seem enough connections to make a parallel with the
two low impedance windings, i dunno. I may have to draw it out to
see how it could be wired.

I shall now try to post a picture or two.
Regards, John

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Heres a pic of the front of it, the motor part is about 90 mm dia,
the pump part is at the base and is about 95 mm square,
the flat part on the left is where the plastic box sits with the
capacitor and the 'head' control.

John

Attached Images

Celsia1.jpg (217.9 KB, 26 views)

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another pic

Attached Images

Celsia2.jpg (194.7 KB, 24 views)

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another pic

Attached Images

Broken_bits_of_plastic_pushed_into_shape.jpg (110.8 KB, 19 views)

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I have managed to get all the background in focus.
Pity about the white object.

However you can make out the baby spade terminals,
three across the top of the rotary switch,
the one on the right did not have a spade fitting on it,
it has a wire soldered on,
the other two had spade fittings on them, from the motor.

The one at middle bottom of the rotary switch
had a spade fitting on it, from the motor.

The six conections shown on the left are actually
three connections each with two connectors showing.
The bottom pair are both the live connection.
The middle pair are both the neutral connection.
The top pair are both the earth connection.

The middle double connector is the supply neutral and has a wire to the
capacitor, and a spade fitting on it, from the motor.
The bottom double connector is the supply live and has a wire to the
rotary switch, and a spade fitting on it, from the motor.

There are two white wires from the capacitor,
one goes to the middle pair of connections, neutral
the other goes to a connection marked '5' which is a
double connection with two spade fittings on it.
This connection marked '5' also had a motor wire fitting on it.

So from that i could draw up a 'sort-of' schematic,
but it would be pretty vague ....

John

Attached Images

The_three_way_rotary_switch.jpg (187.6 KB, 15 views)

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A 'sort-of' diagram.

I will have to look again at that rotary switch,
something doesn't look right there.

I may draw it out properly,
to see if i can figure how the motor is to be wired.

Ive put the motor wires as an 'M'
there are six of them.

Any help with this would be appreciated.
Regards, John

Attached Images

Maybe-Wiring.jpg (163.7 KB, 13 views)

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Checked out the switch.
That is how its laid out.

John

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Hi,

I hope i've traced this right.
but i dont see how to connect the motor.

Maybe someone else could see it ...

John

Attached Images

Diagram.jpg (31.0 KB, 20 views)

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That looks about right but I can't help you connect the motor because I know as much as you.

Have you tried Googling for the datasheet?

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Hi Joe, Hi Hero,

I have PM'd Hotwaterwizard.
i am hoping that this will be a piece of cake for him

Maybe this pump will be running soon.

John

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(and yes, i have tried Google, many times, with many variations,
but i have not found anything)

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If he is able to help you could you please post the answer on the forum so that others can benifit from it.

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