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Any refrigeration experts here?
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<blockquote data-quote="ProDave" data-source="post: 260199" data-attributes="member: 6969"><p>Hi Canoe</p><p></p><p>I only have ONE pressure switch, that shows a closed contact with the unit degassed.</p><p></p><p>The solenoid valve I have is on the flow (or return I don't know which) line from the compressor box to the heat exchanger box.</p><p></p><p>So assuming we can't locate the correct control box, what's the easiest way of wiring those to do the correct thing? I assume it's more complcated than switch in series with solenoid that I have at the moment?</p><p></p><p>Thermostat and contactor is easy to do.</p><p></p><p>In the fan unit there are what look like strip heater elements running across it. They are wired in parallel with the fan so are on all the time the fan is. sounds a bit wastefull?</p><p></p><p>so it sounds like a periodic defrost cycle would be to run the fan unit alone without the compressor?</p><p></p><p>I'll tell the farmer not to run it other than a short test run when the gas is charged, until I can find or make a control box for it.</p></blockquote><p></p>
[QUOTE="ProDave, post: 260199, member: 6969"] Hi Canoe I only have ONE pressure switch, that shows a closed contact with the unit degassed. The solenoid valve I have is on the flow (or return I don't know which) line from the compressor box to the heat exchanger box. So assuming we can't locate the correct control box, what's the easiest way of wiring those to do the correct thing? I assume it's more complcated than switch in series with solenoid that I have at the moment? Thermostat and contactor is easy to do. In the fan unit there are what look like strip heater elements running across it. They are wired in parallel with the fan so are on all the time the fan is. sounds a bit wastefull? so it sounds like a periodic defrost cycle would be to run the fan unit alone without the compressor? I'll tell the farmer not to run it other than a short test run when the gas is charged, until I can find or make a control box for it. [/QUOTE]
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