Re: [Amel Yacht Owners] Re: Water maker power draw
Ian Shepherd <ocean53@...>
Gary,toggle quoted messageShow quoted text
I fitted an AC current meter by drilling two holes in the left hand side of
the grey plastic 220V box just to the right of the cupboard above the sink.
The holes matched the two threaded studs the poke out of the back of the
meter. I then bolted the appropriate leads in the AC system supply to the
studs and presto, one very useful bit of kit which is viewable whenever the
cupboard door is open. Total cost about $10. It measures AC load from both
shore power and the genset.
I have a 160 Ltr/hour water maker too, and the total AC current draw is 17
amps at full output.
I note your further investigations to the sality probe function. When I get
Crusader back in the water in abou 4 weeks time, I will do the same test
that you did. What did you use to bung the hole that the probe screws into?
Ian SM 414 Crusader
Date: 02/19/06 11:03:14
Subject: [Amel Yacht Owners] Re: Water maker power draw
--- In firstname.lastname@example.org, "edmund_steele" <edmundsteele@...>
Ed and others:I had similar trouble with my 160 l/hr watermater on SM # 335. This
began about 6 months after it was new (about the time we set off across the
The 20 amp breaker would trip intermittently and periodically just as yours
This problem continued intermittently until recently when it became more
frequent. So I checked the current draw at the 220 volt breaker panel
in the galley by using a clamp type AC ammeter and with the high pressure
pump running under load. The draw was only 13.5 amps. The breaker is a
20 amp breaker. Normally inductive motor start up loads are high and
you would expect the trip to occur with HP pump motor start, but this has
not been my experience. The trip would happen seemingly randomly and
unrelated to load or start. I didn't have a replacement breaker so I
the existing breaker. This is done by turning the red painted "set" screw
the back of the breaker slightly. I turned mine each 1/8th turn. This
a spring inside the breaker and raises the tension that must be developed on
the bi-metallic conductive strip in the breaker that causes a trip when load
exceeds the "breaker size" limit. Of course I no longer know what the
trip value of this breaker is. I intend to replace it with a 25 amp breaker
soon as possible.
Note that 13.5 amps is probably not the total current draw for the
The circuit box on the back of the watermaker control panel has a 25 amp
breaker labeled "HP" presumably for the HP pump, and also a 6 amp breaker
labeled "BP" which I presume is the "Brine Pump" or low pressure feed pump.
I will take some more measurements next time I am on the boat to verify this
I am trying to get a copy of the schematic and logic diagrams for the water
maker from Dessalator. So far they have only offered to supplly an
installation wiring diagram. I am prepared to reverse engineer this system
to get to the bottom of these questions.
Regards, Gary Silver s/v Liahona
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