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Paul S

Paul S

Joined on February 12, 2009

Last Post on August 30, 2014

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in a rush.....

@ August 30, 2014 2:52 PM in carrier packaged unit......electrical short...HELP

Thank you guys for all your help,I mentioned before that I was in a rush yesterday. I spent time there earlier this morning. I switched the primary side of transformer from 230v to 208v...incoming voltage is 211v.....I found a short to ground at the y1&y2 wires coming back from the economizer ,I posted a pic below unit is running now thanks again Paul S


@ August 29, 2014 11:05 PM in carrier packaged unit......electrical short...HELP

It is a 3 phase unit, i checked all phases , all are fine. i ohmed out the compressor contactor and the condenser fan contactor, both read really low ohm readings...(4 ohms & 6 ohms) both 24v coils , i was in a rush and didnt have the contactor, when i removed the wires from the 24v coils the tripping stopped, but a shorted coil wouldnt show a wire that carries 24v , short to ground meaning y1 and y2 coming back from economizer using continuity on my meter??? the actual coil would have to be touching ground???thanks PAUL S ASM Mechanical Corp BK,NY


@ August 29, 2014 10:32 PM in carrier packaged unit......electrical short...HELP

Hey fellow wallies, im having a problem with a "short" to ground , here. Fuse on 208v by 24v t-frmr keeps tripping. Problem started yesterday when store lost power briefly, i was called there for no cooling this afternoon. HVAC equipment at this store was working fine when I personally did the PM 2 weeks ago. I was in a major rush when i was there so going back in morning, the short is in the first (y1) and second (y2) stage circuits, since i was in a rush i eliminated that there was a short at stat wiring and from control board to economizer and back from economizer to control board......question is in the contactor coil for 1st stg comp and coil for 2nd stg comp and condenser fan, they both ohmed out really low......4 ohms each .....PROBLEM???? Or is that a normal reading , thanks in advance  PAUL S .. ASM Mechanical Corp BK,NY.....

carrier packaged unit......electrical short...HELP

@ August 29, 2014 10:15 PM in carrier packaged unit......electrical short...HELP


false water line?

@ August 19, 2014 12:27 AM in no header and equalizer???

also the old and new boilers water lines , when boiler will be cold the water lines do not look like they fully fill the wet return with water......should i just the boiler on blocks or fit a false water line? thanks paul s

no header and equalizer???

@ August 19, 2014 12:14 AM in no header and equalizer???

i went on estimate today, it was a leaking steam boiler . boiler must be replaced. radiation equals to 325 sq ft/78,000 btus. i got job going to replace tomorrow morning. question is existing boiler has one  3" inch going strainght up to a 2" inch main, no header no equalizer no hartford loop return just goes straight into boiler return tapping. system is a one pipe gravity return system , correct me if im wrong i think its a parellel flow sytem, at the ends of the 2 mains there is a main vent then it drops down to 1 inch 1/4" , should i pipe like i normally do ?, drop header, and how did it work for the last 20 years? no check valve on return...thanks paul s

height length line set

@ July 29, 2014 11:51 PM in height length line set

Hey guys without manufactures literature how do I figure correct subcooling for these jobs,?1/2 psi rule? Is that correct? And how how it's that rule applied or should I just add a Schrader tee with misg? Thanks Paul s

nitrogen and brazing

@ July 29, 2014 11:43 PM in Brazing without nitrogen?!

When I worked for other contractors they never wanted me to braze with nitrogen, only to pressurize. On the other hand they had many problems with clogged TXV'S and failed compressors etc, that they had to go back(call backs) which cost money, now I have my own business all my techs and me and my partner ALWAYS braze with nitrogen purging through the line set, Johnstone sells a adapter especially for this purpose and a low psi regulator, I have very few call backs ,luckily.....Paul s

let's say

@ July 21, 2014 8:01 PM in FREE ,FREE, NO CHARGE ,Schrader Tee.

I don't have capacity charts, And lineset is long and vertical rise is high how do I use this 1/2"psi rule? Or how do I figure how much subcooling I need thanks Paul s , and I will do the Schrader tee soon

how does

@ July 14, 2014 7:20 PM in Height vs SubCooling vs Freon Charge

The 1/2 psi rule work? Thanks Paul s


@ June 22, 2014 9:04 PM in TXV not set properly?

How would I weigh it in by line set length? Do I call the manufacture for that? And how does height affect the charge? Thanks Paul s


@ June 22, 2014 6:45 AM in TXV not set properly?

I believe the txv does have an adjustable stem, equipment is carrier, 12 f subcool was on condensing unit nameplate, outdoor temp was 80f,superheat reading was at condensing unit, line set is about 20 ft and condenser and evaporator are about the same height, readings were after the repair and system was running for a half hour Paul s

TXV not set properly?

@ June 21, 2014 4:03 PM in TXV not set properly?

I went on a job earlier today new 2 1/2 ton r-410a system w/txv, it was undercharged, I found refrigerant leak at filter drier, repaired leak, evacuated to 500 microns etc,added refrigerant, charged to 12f subcool, problem is that my temperature split is to low, 14f (75f/61f)I checked my superheat 26f, line temp 61f ,saturation temp 35f. Am I missing something? Or should I go back and try adjusting txv? Thanks Paul s

thank You Bob

@ May 24, 2014 1:15 AM in HRV UNIT

Anymore explanations please. Thanks Bob you explained it great, and the wiring. I just have to turn the air handler fan on with a set of dry contacts on the Hrv? And how importsnt is it to bslance the airflow betwen the 2 systems and can I use a dual port digital manometer to check the airflow via instalation manual. Thanks Paul S


@ May 23, 2014 10:41 PM in HRV UNIT

Here are some pics make & how it's going to bee installed with air handler Paul S


@ May 23, 2014 10:36 PM in HRV UNIT

I will be installing a Fantech FLEX 100H (HRV) Heat recovery ventilator. I've never installed a HRV , any kind. I have a few weeks to prepare and research they unit. I will have my top duct man with me, and I will handle all the electrical and start up. Im about to read the installation manual now. But I would like to hear in your own words, what is a HRV ? What does it do? How does it benefit the customer? Thanks Paul s

one pipe system

@ May 16, 2014 9:21 PM in one pipe system

Im working on a one pipe parallel flow steam system, customer is adding extension to home, im trying to stay away from using a condensate zone due too budget. Can I pipe the radiator (30 edr) room heatloss is 7000 btus using 2 pipes, with the return going into a wet return? Thanks Paul S

Scalding Water

@ May 14, 2014 11:19 PM in Change water temp on old Richardson boiler

Hey, from what i see in those pictures i BELIEVE its a steam boiler ,i believe i see valves for a gauge glass and a pigtail to a p-trol????correct me if wrong........and it also looks like you have an external tank for your domestic hot water, thats the pic with the temp adj.(AQUASTAT), if it was my house install a mixing'll prevent scalding water thanks PAUL S


@ May 14, 2014 10:55 PM in 3-wire Nest to WM EG boiler?

Are you sure what turns the boiler "on" is a basic 24v  "T&T"......JUST the other day a knucklehead sold a "NEST" thermostat, boiler was one of those LAARS ENDURANCE EBP HOT WATER BOILERS THAT SIT IN A CLOSET...basically its a TOUGH spot to work......3hrs to change relief valve and extrol#15.....BUT on on one occassion i used a simple DPDT OR SPDT general purpose relay (r8222d)??? I think i used a SPST GPRELAY i used one of the normally open contatcs to turn boiler on (T&T).....I WIRED IN A NEW 40VA TRANSFORMER , the TRANSFORMER JUST POWERS THE TSTAT CIRCUIT and the GPR coil ......R from TRANSFORMER goes through R on tstat then when theres a call for heat 24v will go through W to 1 side of gpr relay coil other side to common.....then N/O contacts on relay to T & T.......paul s

Is this correct?

@ April 24, 2014 8:49 PM in Is this correct?

I posted a picture below of a condensate P-trap and condensate drain. ... The coil is on the suction side of blower. ... is the trap piped correctly? And should there be a air vent after it like in plumbing? Thanks Paul Stessler


@ April 23, 2014 9:22 PM in critique the work please



@ March 19, 2014 8:59 PM in compressor

This is a deli with a few r22 split ac systems, single phase. but the systems that the customer is most concerned about is the medium temp walk in box (r22) and the freezer (r404a) both 3 phase....the walk in box i replaced the compressor (burnout \case grounded) about 8 years ago and all seems fine...i just diagnosed the freezers compressor case grounded....the new compressor has a oil eye in the crankcase...the meter is electronic from fieldpiece. thanks Paul S
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