I am a retired commercial refrig eng [health reasons] and have not touched a system for the past 13 years. Many things have changed in that time, gauge's, gas etc.
I have recently bought a cheap and cheerful air source heat pump for my small pool. It arrived well packed and I was surprised by the quality, it is very well made and has a Toshiba rotary comp. Because it was cheap, the setting up instructions are not all that good. It gives basic parameter settings on the digital display, but that is all.
What I need to know is how to set up the water flow rate to get maximum efficiency. I have a bi pass kit to control the water flow. I do not have any of my old gauge's, however there is a built in gauge on the side.<br><br>This gauge reads Kg-cm2&nbsp;&nbsp; 0 to 55
and MPa &nbsp; 0 to 5.5, plus temperature in both f &amp; c.<br>Gas used is R410A. It is a bit different from the PSIG ones I am used to, so if any one can help please bear this in mind, my little grey cell is not what it used to be.<img smilieid="1" class="inlineimg" src="http://www.refrigeration-engineer.com/forums/images/smilies/happy.png" border="0"><br>Until I have a look inside I don't know if the gauge is linked to the suction or discharge. This does not really matter so long as I have one or the other.<br><br><br>My filter/pump can handle 1600 gals/hour, [7.2 cubic metres] the heat pump is rated to handle 1.5 - 2 cubic metres hour so I would imagine the flow rate will have to to be throttled back using the bi pass valves. Any help as the best way do do this will be greatly appreciated.<br><br>Basically, what would be an 'average' suction / discharge pressure/temp to adjust the water flow to. I know water and air temps will have a bearing on the pressures, so&nbsp; 'average'&nbsp; readings would give me something to work with.<br><br>I think I have covered all that is needed, any further info reqd please ask.<br><br>southcoaster.<br>