PDA

View Full Version : high psi, low psi cutout recommendations



glockdoc
06-30-2009, 01:02 PM
I have a few rent houses that I would like to make idiot/tenant proof as much as possible. I installed a builder grade Goodman condenser last year in one of them and want to add encapsulated high pressure cutout and low pressure cutout switches to this unit, 42k btu, R22. Looks like 410psi is the standard for the high side. Is that correct? Any recommendations for the low side, would a 35psi cutout be acceptable or something higher like 50psi. My primary concern is keeping the condensing unit from destroying itself if a fan craps out or the freon leaks out.

Also, is it acceptable to install a hard start kit whether or not required by the manufacturer. Seems there is an opinion that a hard start kit would prolong the life of the compressor because of the quicker start-up and less heating of the windings.

From the slumlord standpoint, does it make sense to replace the run caps every few years as preventative maintenance or do the caps typically fail at random time intervals. thanx ...Al

DeAngel
06-30-2009, 01:33 PM
[COLOR="Red"TMI[/COLOR]

Compressor hard start devices are used in rectifying a myriad of compressor start problems. The majority of hard start device applications result from the marginal voltages delivered by electric utilities during peak demand periods. As the predominant application, the hard start device can serve as an insurance policy for compressor starts when voltages drop to 90% of rated line conditions.

There is no benefit to replacing run or start capacitors as routine maintenance. They fail when they fail.

To perform any of these task you will need a qualified HVAC mechanic.

beenthere
06-30-2009, 05:00 PM
Sorry, this is not a DIY site. So we are not allowed to give out DIY advise.

Please read Site Rules (http://hvac-talk.com/vbb/showthread.php?threadid=1241) Thank you.



Thread closed.