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A guy I work with just had an Ambiance mini split system installed in a garage conversion. He says the fan runs 7-24 unless the unit is switched off. Cooling or not, the fan runs unless you swith the...

Well, I popped the top for a quick look see. There doesn't apear to be any obvious signs of a leak. It's a cap tube system, Copeland compresssor, no ports available so I guess I'll have to go get...

Thanks for the replies. I'll start opening things up and see about getting some temps and pressures.This may take a while...I'm told it's not the top priority right now...yeah that 'll change quick...

We have two "identical" Hobart QF2 R 404a reach-in freezers sitting side by side in a small commercial kitchen. One will reach about 4.2 degrees, the other seems to hang at about 16 degrees. I've...

Check the connections at the water level sensors and the sensors themselves. Make sure if you have completed a descale on the unit that the sensors are well rinsed of the descaler. Unless the sensors...

You also might want to check the service disconnect to the AHU for a shunt trip circuit. On our panels there is no indication of the trip other than loss of power. a real PITA.

I use Simple Green and H2O in whatever dilution it takes to cut the grime. works indoors and out, non-toxic, biodegradable and smells good for evaps.

Ditto.

Worked on a couple of these. Sand and CLEAN the shaft VERY WELL and the new bearing should slide right down the shaft. If you oil the shaft lightly it will help. Too much oil on the shaft will cause...

Well, Finally got it figured out. The tech brought in a lap top and hooked it up. It did absolutley nothing. The problem turned out to be that when the pupmped the unit down they used the pumpdown...

As far as I know, the only time a laptop was hooked up to this chiller was at start-up. I never saw a laptop during the last service call, but I'll make some calls and double check. I can engage the...

We use INET 7 for EMS/BAS applications. I have reviewed all points in the MCI and PCU relating to chiller operation and there is nothing in manual or test in either controler and the point...

Now that the approach problem is solved, I have a problem with the Hot Gas Bypass. This is a PIC II with a CCN network interface. On start-up it says it's calling for HGBP but the solenoid is not...

The approach on our chiller has returned to normal operational values. The problem WAS non-condensables. Thanks to all for your input.

Thanks to all. We are going to have the liquid recovered and send the vapor off for recycling/destruction, then weigh the recovered liquid charge and add new 22 to make up the differance. Then will...

Thanks for the replies. Jacob and hvac: The readings were taken after transfer from the other chiller under about 3/4 load and after approx. 1 hour of operation.I noticed today that there is a...

Thanks for the reply. The presssure sensor reading matches the gauge reading on the barrel.

We have two 23XL 200Ton R-22 three pass screw machines with the economizer. Chiller #2 has always had a higher approach than #1. It recently had the condenser float replaced as well as isolation...

A push-pull method of removing refrigerant is accomplished by connecting the liquid line fitting on
the system to the liquid line fitting on the recovery tank. The suction line of the recovery unit...

Has any one used one of the sonic belt tensioning meters?
There are some areas where a "pogo stick" won't work and some applications where the rule of thumb isn't accurate enough. Are they reliable?