High side pressure fluctuates on new system.

[maxwell800xp]

I just installed a new Goodman 13SEER 2.5Ton R410a (scroll) fixed orifice system with new air handler. Correct oriface was installed. Out side temp is 93F indoor is 73F. Low side pressue fluctuated 132-136psi. Low side temp is 58.6F giving me a superheat of 17.4. Calculated super heat is 14. Not far off. The high side is fluctuating from 450-650psi. I have not seen this before. I can hear the compressor labor at the higher pressure. My boss said not to worry about it unless the customer calls. I think the compressor may be damaged by this high pressure. Any thoughts out there?

[martyinlincoln]

Shouldn't have anywhere near that high of head pressure with 93 ambient. If you weighed in the correct charge then check for non condensables.

[energy star]

Might as well get some parts in stock now.

[SBKold]

You have a 5mm coil unit. You need to remove some.

[socotech]

Sounds like noncondensables to me. Did you pull deep vacuum? Microns?

[cavitech]

Balance the charge, all I install is Goodman and I've seen this more times than I can count.

[Snapperhead]

Remove some and tell us what happens ....

[Saturatedpsi]

For that OD temp, the head pressure should be around 375 psi. Measure subcooling and see if it's not way high.

[jtrammel]

Overcharged

[LKJoel]

Sounds like noncondensables to me. Did you pull deep vacuum? Microns?

I agree, first glance sounds like noncondensables

[kw10925]

Not to sound stupid but from what i read he has a new 410a system and a new air handler,Shouldnt that be a txv not a fixed orifice.
and did he change the filter drier as well

[Crazecodyk]

They ship systems with orifices and txvs. If was new system why wasn't the factory charge adequate?

[SoFlaDave]

If its a microchannel condenser the charge will be very light for even the shortest runs and in general will hold almost 20% less than a comparable tube/fin system when fully charged.