Heating Help

Is it me or is Wiring diagrams getting smaller in print???

@ August 10, 2011 6:26 PM in Is it me or is Wiring diagrams getting smaller in print???

OK 46 now, been in the service field for 27 years and I know my eyes need the occasional reading glasses,....BUT  The print is dang small and I'm not sure the reason besides more info and I was wondering how the rest of the Service field thinks about this?

Mike T.

Agreed, need info.

@ August 9, 2011 2:46 PM in Trane chiller trips on excessive condenser pressure

Water cooled cond or air cooled ? Chime bach in so we can try to help.

Mike T.

So,....So ......TRUE.

@ August 9, 2011 2:33 PM in Condenser Fan Motors and Blades

They go hand in hand.

All in the #'s

@ August 9, 2011 2:30 PM in Air handler sizing

This is where all thoes books I USED to throw away come into play.  Lot's of info and in hind site, i usually regret throwing them out but now keep EVERYTHING......

Mike T.

A learning experience....

@ July 28, 2011 6:38 PM in wiring question

Yes the system started and ran great, but in affect, the start winding of the compressor was burned out!..  The run cap has 1 job and 1 job only to for a brief second, assist the start winding to crank the compressor over.  Once it starts and runs, no assistance required.  The caps essentially charged upon call than plays a minor roll for operation.  Since the leads were reversed,  the problem is that the start winding is CONSTANTLY engaged.  Surprised that it lasted as long as it did.  Chuck it up to "Seen that, now I know".......:-)  Remember the run cap only stores electrical energy.  Basically it kicks the start winding in then ........out of the circuit.

Hope this helped.
Mike T.
One thought:  Remember how when troubleshooting , say condenser fan motor?  Will not start by itself, but if I give it a twirl,,...................Runs great.................?  Ring a bell?

Gene, did you Boot me out?

@ July 28, 2011 5:55 PM in wiring question

I was trying to explain this wiring and BAM,,,,,,  I was out of the pool........:-)

Just wondering if it was you or something on my end...

Mike T.

Agree.

@ July 27, 2011 5:19 PM in Chiller Temp

I usually shoot for 10*F, But not a rule.   Every system is different and assuming that the pipe sizing is correct, I am looking for my chilled water to handle the design flow.  When you go outside of recommended range, "Say too small or too large of pipe, your delta "T^" may not work the way the manual Say's.  It's all about flow of the medium/water or glycol.  Can you emagine having 4" pipe?  Yea you have your 10 diff, but the water volicity does not match your chiller. 
B&G has a nice system sizer that gets you in the ball park abd is very useful for calculations, volicity noised etc.....  B&G.COM

Mike T.

Wholy COW???

@ July 27, 2011 4:57 PM in Averaging sensors for thermostats

Mark:
   At first I had to take a double take on your figures, but all is goo with you......:-)  Not being a math major, I used the all powerful calculator and I get your result and your thinking........
So I'm not going crazy......

Mikie T.

Gene, Great points.

@ July 27, 2011 4:50 PM in Icing indoor coil

As you know by the time we get there it has been cycling for 1 billion years........Exaggerating,.... So the info you give will only result from a somewhat fresh start.  The ice will build and compound itself due to the remaining coil area not yet frozen and result in the beer cooler scenario. 
     Air flow is also important and can play a roll in this problem, but let's see what other facts can be provided.

Great to talk to you again Geno.......

Mike T
Empire Mech.

This sounds like a test......:-)

@ July 25, 2011 9:08 PM in TXV capacity

I'll say Orifice size in valve, Delta" P" between hi and lo side and The temp and state of the liquid entering the valve...........

I took a shot.  It's been a while since theory racked my brain......

Peace

Mike T.............

22 YEARS?

@ July 25, 2011 8:28 PM in rheem ac noise

Wow, count you blessings and not to sound consenting, but the average life of ANY system is roughly 12 to 15 years before you can expect problems like you are experiencing.  Yes, I know this does not help, but the HVAC does not owe the church anything.  It has served you somewhat well.  Now a decision has to be made as the HVAC community can only put on so many band aids before you start saying I will try another contractor".  Unfortunatly, these service calls cost a lot of money and in the end of things you will never be happy.  This syste3m is crying out, "I cant do it any more".  Just an opinion.

Mike T.

Hey Terry, how have you been?
    

Evap coil

@ July 18, 2011 5:21 AM in return,filter,comfort air blower,coil and supply trunk

Not unusual and sometimes it is where it is due to limited space.  You will also notice that the condensate is trapped or should be trapped because of the neg. draw.  The only problem is the filter.  Should be doing its job before the A/C coil.

Mike T.

Wow.........

@ June 15, 2011 4:37 PM in The Demise of Hallowell International

Nice explanation.  As soon as I'm finished with my Chess match,.....I will comment.  :-)


Mike T.

Tragic...

@ May 14, 2011 2:39 AM in Landlord Charged with Reckless Homicide in Tenants’ Carbon Monoxide Deaths

Could have been prevented, but the all mighty dollar prevailed.....Allegedly........

Peace....

Mike T.

Trane RTU? Voyager?

@ May 14, 2011 2:35 AM in Voyager combustion blower

If so the Induced draft motor is shorted out.  Will still work in heat, but not shut down.  Trane is well aware of this problem and was , for a time covered under warranty.

Mike T.

PS; Hi Tim..........

Back up a little?

@ May 14, 2011 2:24 AM in fluctuating liquid pressure

Let's reclaim 1/3 of your charge,.....  You are overcharged!!!  I'll bet that when your head rises to 480psig, you suction takes a dip...?  Am I right?  As the suction pressure goes down, the liquid being jammed into the restrictor has  more room to basically move into the lo side, and thus suction comes up, head goes down,...AND repeates.  Your restriction is the refrigerant itself.  Accurators work on poressure diff.  only, period.  Save time and just get rid of your excess charge.  This is only my opinion and I hope I'm not steping on any teos here.

Mike T.

What is Your Question???

@ April 13, 2011 9:42 PM in epa ruling

I tried to read your question 5 times and had no luck in even formulating an answer to your Question.....  "We are currently looking at replacing a 50 ton r-22 condensing unit where the air handler and associated piping would be kept"??????  What????
Can you rephrase your question.?  I was lost at deos anyone............

System Syzer Calculator, B&G

@ March 10, 2011 11:31 PM in BTU condutivity of copper pipe

Let's take a look at your water: That seems to be a fact from you.
100gpm@2.5 gpm/ton= 460K/hr or 38.33 ton with a 9.5 "Delta T"  This will work, but not very efficient.
Lower your gpm to 50gpm@2.5/ton= 500K at a 20* "Delta T" accross the barrel with out changing anything except flow.  Aprox tonnage= 45.83 ton/hr.
Since I am not sure what you are doing with this application, the Above tool from B&G costs about $25.00 and lets you solve gpm, volume, speed of fluid, head,pressure drop, noise senerios etc...
With a chiller barrel at 60*f and diff at 0*f, technically you could acheive 60 ton since 1 ton at 2.5gpm=12,000@ 10*f "Delta T".  but your water would move so slow it would be non usable. 
As far as your rated capacity, it should be stamped somewhere on  the barrel or compressor. Since you stated 100 GPM,...right there it's telling me that its at or above 35 ton. 
Side note, Eugene S will probably chime in and there are alot of questions before an accurate representation can be figured.
I hope this was of some kind of help for you.......
Peace:
Mike T.

"Lock Out"

@ March 5, 2011 5:07 AM in Weil Mclain Gold gv random lockouts - need advice

Unfortunately there are quite a few things that can cause ?"Lock out").  Cleaning furnace is always a start, but in your case further analysis should be done.  Time to start from ground zero and check:  Design of furnace,Installation, combustion test!, Delte t, etc.  Call a company that is able to perform these tests to aid in the repair of problem. 

Mike T.

Min Zone?

@ March 2, 2011 6:53 AM in twinning furnaces

Sounds like a possible design problem.  Even with the least amount of zones calling, there must be an exceptable min air flow to avoid this problem.  Can you slave 1 or more zones to say.....2 ton out put?  800 cfm will probably make the bypass not open as much.  Noise is the main problem, but you have to dump the air somewhere and that's whay I think this might help.

Mike T.

A few thoughts...

@ February 24, 2011 7:29 PM in economizer question

First off Hello Eugene and Terry,.....It's been a while.  Evertone has touched on some basic characteristics of various Econo's.  Carrier, Ruud York, primarily use Honeywell actuators and sensors.  Like most of you stated stg 1 if below enthalpy (Outside) will opern the dampers to different positions and modulate according to what the DAT discharge air sensor is sensing.  It try's to maintain a 50 DAT for this so called free cool. If stage 2 calls,.....and the internal wiring on the RTU not the econo, determins how the additional demand for cooling is satisfied.  I have seen econo damper close when stg 2 calls and I have also seen the damper modulate to a smaller percentage while still in Mechanical cooling.  As stated LO amb is needed.  Go to Honeywell .com and download the wiring diagrams for the actuator you are working on.  In addition you may want to eliminate the mixed air enthalpy control which can be done according to HW.  This will eliminate the R/A imput to the control.

Peace Mike T.

Beware.....

@ October 30, 2010 7:39 AM in Ignitor isn't firing

I understand you want to attack this problem yourself, but call your professional tech.  Are you sure the orifices arent plugged?  You can buy new burners and still have the same problem.  This is also how home owners get hurt and or killed.  Dont skip on safety,....I'm tired of reading in the paper that people are getting hurt or even dead because of lack of maintenance.....NO JOKE


Mike T.