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Agree with ar hvac man. Use it if thats all you have, until you get correct size. Have gone on 3 calls this year so far, where home owner went and got there own motor off the net. Not a OEM one, but...

Agree with Slayer0901. They tend to shoot low on the factory charge. But Superheat chart or subcooling will steer you right. But if its not a matched system. Different condenser brand then what was...

Doesnt matter what they use, if its not used right and the Ph and chemicals are not measured and tested correctly. We tried to make it easy for them, But due to ignorance and lack of training they...

We have both PoolPak and Dectrons for several of our pools. Both are good machines. PoolPak is easier to get support, beings its sponsered by Trane. Dectron is a Canadian company, at least thats were...

Hard to do in a residential dwelling or complex. Our crime labs and drug storage rooms were built for that purpose, to isolate it from the rest of the building. They are basically buildings within...

Yes it can and has happened. Always make sure you have a check valve. there was a tech who posted last year or so, asking how to get a couple of gallons of oil out of a absorber. His pump failed and...

Hey all, Got a small lennox that is still running, but the cost of keeping it running is getting higher. The unit is so faded that I can't get a model #, even off the electrical backside. Costumer...

We had a building that we replaced 12 units with carriers. After about five months we were changing out compressors on a weekly bases. All had leaks in this area. Carrier didnt really know about any...

I have a 1998 Schult home, now owned by Clayton homes. My house is 1398sf, and is sized with a 3.5 ton system. the heat gain and loss of the home has already been done for your home for the area it...

Lennox and Carrier reps both told me it was done in part to help out the apartment complex industry. If you have a a complex with 300 plus units, the price of converting every unit that needed a new...

Don't think the NFPA will say much on it. It covers fire code and protection. This is a mechanical code issue. Unless you consider the possibility of CO entering the building. Even then its an IAQ...

Most of the time that I have had a transformer trip or control fuss blow on a consistant bases and find no shorts or bad wiring. Its been the contactor. Mostly with the compressors. But in heating...

Well, do you mean like a parallel loop? There are many setups for chillwater pipeing systems, depending on the application. The secondary loops in my case serve smaller air handlers in one building....

Well good. I didnt wont to sound like a clean freak or anything. And to bwalley: yes I do have a HVAC Contractors license and a electrical contractors license, insured and bonded. I work for a City...

Just wonted to see what others would say on this topic. Have you ever gone to a house that was so dirty and filthy that you just had to leave and tell the customer that they need to call someone...

Glad to here someone actually takes the time to clean a unit. Its the most naglected part of the trade I think. I have seen some units that I dont know why they run to begin with, they are so filthy....

Boy O Boy, my job would be on the line. Dont know about other machines, but the Yazakis run around $20-30,000 for a new charge of Bromide. That was about 6 years ago too. Man that realy sucks.

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Five gallons of old oil??? Well we have 4 Yazaki gas fired units, 1 V80 and 3 K100. My instructor always said that that was basicaly DEATH for the machine. If your talking about pulling a vacuum and...

Most propane tanks have a regulator pressure relief valve, or reducer that vents to the atmosphere, same as most natural gas meters. Its normal to get just a hint of gas once in a while if you stand...

I have done allot of them, but its been a couple of years now. Sort of gone the way,like swagging copper. Easier to just by the replacement strips and stick them in. If you do restring just got to...

12awg is good for 20amps. This we know but a 20amp breaker is only good for 80% of that load, which nocks you down to a continuous load of 16. So it would be good to know the exact amp draw of that...

I change out more trane igniters then any other brands we work on. But its a norton made in some cases and I have used the trane models on Lochinvar boilers, in a pinch. They last on the boilers in...

To glennwith2ns: you are correct about the derating of the wire. I just didnt wont to get into all the code specifics.

To Nchvac: to answere your question. The code is clear to me in the fact...

The overcurrent device, being the main breaker doesnt care about the heatpump or unit. It is there to protect the wire (branch circuit protection. 12awg is good for 25 amps unless you use higher...

The jist of it is, you should be able to place any unit you wont, on a 200amp service without having to modify it for Puget. You will never run everything at the same time. The code concludes this...