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Old 02-19-19, 10:42 AM   #11
Murdock
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Nice build, professional look

Can you comment a bit on your start-up and shutdown procedure?

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Old 02-19-19, 04:42 PM   #12
pavel
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There are three sequences controlled by the software:

START:
- turn both circulation pumps ON
- close EEV by 500 steps, open EEV by 150 steps
- ramp compressor SSR up from 50% to 100% in 800ms
- switch compressor coil relay ON
- switch compressor SSR OFF
https://github.com/burgrp/nanook-js/...r.js#L218-L243

STOP:
- switch compressor SSR ON
- switch compressor coil relay OFF
- switch compressor SSR OFF
- close EEV by 500 steps
- turn both circulation pumps OFF
https://github.com/burgrp/nanook-js/...r.js#L252-L280

MEASURE:
Is a simple sequence launched every 5minutes when HP turned off. It just turns output circulation pump ON for 30seconds, measures water temperature, and then turns the circulation pump OFF. This way there is no need for external temperature sensor.
https://github.com/burgrp/nanook-js/...r.js#L327-L338
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Old 02-26-19, 10:55 AM   #13
Murdock
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looks like you have 3 speed-circulator pumps; Have you allready experimented with the speed of these pumps? I guess you could control the speed via 2 relays
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Old 02-27-19, 03:49 PM   #14
pavel
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It could be controlled, but it seems to be not necessary. The secondary side is switched to minimum which is enough to transport the heat to accumulator tank. The primary side is switched to maximum, while the temperature drop is a bit higher then it should be - so I probably need more powerful pump here.
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Old 03-24-19, 01:34 PM   #15
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Git repositories have been moved under DEVICE.FARM organization:
https://github.com/device-farm?utf8=...ype=&language=

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