Joined on January 19, 2012
Last Post on June 8, 2014
@ June 8, 2014 5:18 PM in txv issueIt ran until today ok with bulb off. I replaced filter drier. When I shook it it didn't have the normal rattle and seemed a little heavy but it wasn't heavily clogged I could blow through it. When I came back it was running at about 34 degrees. After drier change 35. Pressure slowly drops from 42 to 35. 23 superheat at ah. Could not find any kinks. Liquid line is hot at start up but then cools. 15 sub cooling. Any suggestions. Strainer clogged. Thanks. Mike.
@ June 8, 2014 10:43 AM in txv issueDr Silberstein and meplumber for the quick response. I will check the filter drier. What is an acceptable temp drop accross drier. 2 or 3 degrees? Also check for kink. What about strainer at txv? What I don't understand is shouldn't the txv be opening up like it does with bulb off, to compensate for the high superheat? I will also check superheat. Thanks, mike.
@ June 8, 2014 1:18 AM in txv issueHello to all
Having an issue on a residential split system I maintained last year for the first time and had no issues. This year they called and said it was not working. I could not get the suction pressure above 30 degrees Fahrenheit. (I always think in temp. so Im not sure of the pressure, 105 psi?, r410a) I was for sure overcharging it because head pressure went up, subcooling went up high but suction pressure did not budge. liquid line was cool and suction line not cold. I took the txv bulb off the suction line and let it hang outside the unit and suction pressure went up to about 42 degrees. liquid line got cold but still seemed to appear undercharged based on subcooling and head pressure. Is this a txv problem and why?
thanks a lot, Michael.
@ June 8, 2014 12:52 AM in Servicing Mini SplitsI got a nice set of leads at johnstone. very thin and don't have to bother with paperclips etc.
@ May 23, 2014 2:18 PM in Mini split making noiseIt's vibrating. The pipes are individuall insulated. I don't hear anything outside by the lineset. It just seems to be the copper expanding and contracting. It also makes the noise when it shuts down, like a car engine. Thanks for your responses. Mike
@ May 20, 2014 10:50 PM in Mini split making noiseIs 25 feet long. This is 24 feet less than the max length and above the minimal. In regard to the fan speed, when in high speed the blower does turn very fast. The customer seems to only hear it in heating mode. Fugitsu had me make sure the charge was right, which was. They also had me ohm the txv which was fine. Any help would be greatly appreciated as the customer is not too happy
PS. I spoke to a friend of mine asking for advice. He made me feel better about my situation. He installed a fugitsu 3 years ago and if I remember correctly every time the AH comes on for about three or four minutes it spits out water. I don't recall what he tried to fix it but he was unable to solve the problem. Any suggestions would be appreciated as well.
@ April 29, 2014 4:32 PM in Mini split making noiseEven on high speed? Thanks for the reply.
@ April 29, 2014 2:51 PM in Mini split making noiseHello to all
I recently installed a Fujitsu heat pump. The system works fine but the customer complains it makes a very slight but audible noise coming from a/h. To me it seems to make a crackling noise, in either heat or cooling, like copper expanding or contracting. With system off and fan on it makes no noise. Any suggestions?
@ February 25, 2014 12:35 PM in Furnace cfmHello to all
What is the rule of thumb/how do you calculate how much cfm you need for a furnace. Like we say 400 cfm for each ton of cooling.
@ February 24, 2014 7:09 PM in Old p-tekThank you so much. I searched FOREVER for a replacement and this company has it. Thanks Michael
@ February 23, 2014 10:13 PM in Bonnet capacityThank u for the response. You are right that it's an old furnace as you can see from the picture. I had been told exactly what u said but I wanted confirmation. Also that's a great idea about a condensing unit. But I'm still wondering what exactly does bonnet capacity actually mean. Thanks mike
@ February 23, 2014 1:10 PM in Bonnet capacitySo if I replace it with an 80% I don't need a liner?
@ February 23, 2014 10:35 AM in Bonnet capacityHello to all
What does bonnet capacity mean.
I have a friend that wants to replace his forced hot air system that says input 100000 btu bonnet capacity 80000 btu
I know it differs from afue but is this an 80% furnace?
@ February 20, 2014 9:23 AM in Old p-tekHello to all
Does anyone have any suggestions for a replacement for an old weather king unit by embassy ind. model ETW 80-e2. I can't find a replacement that fits into the sleeve. Thanks Michael
@ January 10, 2014 12:20 PM in Rad btuHello to all
What is the btu output of this rad. It is 34 inches high and 8 inches across the two columns it's leaking and my neighbor wants to replace it I have not yet bought Dans EDR. Thanks Michael
@ October 28, 2013 11:04 AM in Fresh AirI am installing a 45,000 BTU %80 furnace in a small mechanical room in a finished attic and would like to bring in fresh air for combustion. Is there a calculation to find out what size pipe I need? Thanks, Mike
@ October 17, 2013 10:20 AM in refrigerent traps and subcoolingfor the responses. pecmsg, but where do you take the actually the subcooling measurement. Also, you talk about a liquid seal. I understand that to mean, no matter where the outlet to the receiver is, you always have liquid leaving . If the outlet is on the bottom there is liquid there and if its on the top you have a dip tube into the liquid. So on a slightly undercharged system you should have enough liquid to maintain a liquid seal, why do you get bubbles in the sight glass? Thanks, Mike.
@ October 17, 2013 9:54 AM in is it trueBut I would think that there has to be a reason for that. I read that overfiring can also cause CO because you get incomplete combustion from the extra gas. Did you find any reason for the CO on the new unit? Thanks, Mike.
@ October 16, 2013 12:05 AM in is it trueput a CO tester at the outlet of the flue and had no reading.
@ October 16, 2013 12:03 AM in is it truedoes a properly operating furnace create dangerous levels of CO if they were somehow vented into the living space.
@ October 15, 2013 8:18 PM in is it truethat carbon monoxide is only formed from incomplete combustion. almost everything that I have read online says that this is so. Even the name implies this. Monoxide, lacking the oxygen atom that would normaly be a bibroduct of combustion as carbon dioxide. But many people in the field for a long time insist that if you drill a hole in a furnace heat exchanger (excluding other problems this would create) you will for sure get CO in the house. Thanks, Michael.