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Isnt the Carrier coil leak a B? In the last 30 yrs have fixed many, kinda hard to shake your head and braze at the same time, while calculating retirement. Its a weak point but sometimes set in...

I knew the new MGR over there, seemed like a nice guy. Whats up?

Anyone heard good or bad or whats coming for Siemens mech? Have a chance to go to work for them in the NW.

Need help on a chiller short cycling problem. Have a Mac chiller, 25 ton that feeds one AH, 100% OSA, and the stat[JC A350] satisfies before the setpoint, shuts off the machine then recalls. Restart...

Does anybody have any info on HVAC work in New Zealand? I see via thier embassy site that we are on the desired jobs listed as needed personnel, have 30 yrs in, mostly larger systems and controls.

They say this unit has done this since orig install, 1997. I see the switches have been changed, and the water reg valves backed all the way out, but what occures is not high head. You can have your...

Have a five ton scroll compressor with a reed style hp manual reset about 3 inches down the discharge line. The idle compressor starts and pops the saftey in about 2 seconds. Reset and restart the...

To me it all depends on the metering device....
ie cap tube, evacuate and wiegh in exact charge,Txv, 15 degrees subcooling,etc. Once every style of metering device is understood, charging is easy.

Again, with this open faced impeller and designed rpm, the lift is very limited. This machine was inroduced when everyone was wanting to sell the most efficient kw per ton at the cheapest cost. Dont...

I installed a vfd on this chiller around 1995.
Believe me there is a reason it turns the wheel at 18 grand. If you dont have the correct logic and cannot anticipate a surge youll be right back into...

ah....old code 51....first eliminate the dhgt,it was found as a point of trip years ago,factory said wire it out.Second,the only way the processor knows [thinks]the compressor is running is by a [I...

Id be willing to bet if you install LP switches sensing suction pressure, set them to run a 42-45 degree coil,and split out LLS2,that is run the hot thru a return air sensor that makes at say 76 deg,...

Sure, and at 3lbs per degree,how long do you think the branch line will stay at 8psi? Assuming normal deck temp at about 55 and 90 degrees,your overlap wont cool or heat very well until the stat...

If the whole building has had these actuators replaced incorrectly,why not just buy a new actuator for the hot deck,4-8 spring. What a hero youll be. I just ask that you act like you know exactly...

I guess I misunderstood, I assumed this was a Multizone air handler.Sounds like what you have is a hot and cold mixing box. First check your actuators,the spring ranges cant overlap.If this is a...

Just guessing, sounds like these two zones have been grouped together perhaps due to a TI. If that stat is a single pipe feeding both actuators, you may have a fitting,tube,or diaphram leak.If single...

We took over the Wells Fargo bldg downtown San Diego from Trane. Both 700 ton centrifugal control panels had all sorts of added toggle switches on the face that I could not figure out.I was up there...

I worked for jc in San Diego, anybody as unlucky?

What do you need?

I was one of the first to add fd to this compressor,say around 1996-97. With the open faced impeller and high rpm,just about any condition that would exceed the lift and you are into surge, and this...

Worked for them for about eight years twenty years ago.First three were great,then the JC wave started.I went through about ten waves with them,all the same scenario.Big common sense ideas,hire mgt...

The so called control cos in my area[NW]are going by the wayside with thier cumbersome high priced service.The smaller groups with the now relocated techs are kicking butt in the small and medium...

Almost forgot,I consider this a wiegh in charge.

I had a few of these when I worked for C, and I am suprised you also have not alarmed due to low cooler temp.This metering device looks like the raised slotted cover to a floor drain.A liquid line...

So in this 32 hr "class" we had to attend,one of the instructors makes this statement that article 261 makes HVAC[repairs]exemp from a license.If all they are saying is that they dont want us to pull...