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There's a few threads on this subject and 407a . Lots of good info.

407a

Model of case would help.

High side , low side pressures would help.

More info needed.
I'm with the other guys , with info given I would say your low on charge. Check the link JP has posted...

That's a good idea. Only took a day for the oil sight glasses to look pretty dark.

And JP you weren't kidding about the leaks. I finished my part of the job last friday as I had to be at another...

This will be on medium temp equipment so thankfully we will have not hot gas or kool gas defrosts.
We will be starting the swap over tomorrow so wish me luck!
I know what you mean about the gas,...

Stats and solenoids at the evaps.
Sounds like we have our work cut out for us!
Appreciate the feedback JP.
I will try and post the outcomes.
Cheers

I have no experience with this refrigerant as well as glide, so this will be interesting and a learning curve to say the least.

As for the oil, the new units come with oil added already I just...

Just wondering how your guys experience is with some conversions.

We will be swapping some medium temp conventional r22 systems onto a new zero zone protocol type system running 407a. 6 scrolls...

A velometer is a great tool for measuring airflow. You just put the device in the discharge air and should give you a reading in FPM. If you get the model numbers of the cases in question you can...

Thanks for the help boys turns out the glass wasn't as full as I thought it was. Had a coworker come help me out. Added some gas and adjusted the hold back and receiver valve as well. They just...

The 8ft case is 740 btu\ft so 5940 btu total.
The 6ft case is 4440 btu total.
So you would think the 6ft case with the "2" cartrige in it would be sufficient.
The 8ft should have the "A"...

There is 4 cases in this island setup and none are making temp. I have one txv wide open with no change. I checked the screens yesterday and cleaned them. Double checked them today and clean as a...

Just installed 4 barker deli cases and having trouble making temp and running out of ideas.

Case model PF-8 and PF-6
The txv is frosting after the valve and the frost doesn't make it through the...

:cheers:





$270 isnt too bad I guess, might be a tool worth investing in.

Do you happen to have any info on that hand held controller?

Thanks Jp appreciate it! :cheers:

So my plan on adding these valves in the cases on this loop system and just leave them till we swap this all over to the new rack is not going to work. I guess I...

Hi JP sorry like i said I had a long day so dont think I quite follow your post.

As far as they stay where they are put, meaning they are set to a predetermined postition untill they need to move...

hi guys just wondering if these valves stay wide open without power applied? I seem to recall that is what they do , but im second guessing myself as its been a long day and none of the bulletins on...

Thanks every one

Thanks for the input guys.
This is only a furnace not a heat pump and there only other gas fired appliance is a hot water tank.
I remember clocking meters in the gas course so I will try that too....

Hi there. I am going to look at my parents furnace on the weekend as they told me there bill has gone up 100 bucks a month. I suggested to call the utility company as there is likely something wrong...

:LOL:

haha thanks for the input guys ill try and go 180/170 from the 200/180 setpoints that its running now and see if that changes anything, if it does maybe ill try and go a little lower and play around...

Thanks JP I will give that go! appreciate the input :cheers:

The hold back sorit valve is set for 200 #
The A9 receiver valve is set at 180#

Do these set points sound good?
Is there something else that I am missing? Or something else to check?

I will...