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RJ

RJ

Joined on February 3, 2007

Last Post on July 18, 2014

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sizing

@ September 19, 2013 2:47 PM in ac system design help

I would find someone with a background in ductwork to help.    Get a Trane Ductulator, the Trane air conditioning manual ( hard back book ) and fan curves on your equip. to get started

compressor

@ September 17, 2013 11:33 AM in Heat Pump Compressor Diagnosis - Building Fire

The internal overload may have been compromised

boiler

@ September 17, 2013 11:29 AM in It's that time again!

Working in San Fran for 20 yrs I remember that part of September and October were the only months you could shut down boilers for more than a week.  In July 2011 it never got above 60 degrees the whole month.  But starting my career in Denver yrs ago I know what you mean, I always loved the smell of an old boiler room when firing up the boiler in the fall.

dont forget that tower

@ September 15, 2013 1:14 PM in dont forget that tower

As we approach fall dont forget to schedule a cooling tower shut down and drain of the smaller towers.  I remember a job in Denver years ago when we forgot to check a tower, we were counting on a auto drain system (3 way zone valve ) that failed. Got a call from the customer  that something did not look right on the tower, , thats when we found the tower and pump froze, the tower looked like a beer can left in a freezer,and the pump volute was cracked.   lesson learned

pilot

@ September 15, 2013 10:19 AM in Pilot question

In my years of working on gas fired equip, mostly commercial, I have found most pilots (Honeywell, Johnson controls ) come with a natural gas orfice and a smaller diameter propane orfice. Larger systems use pilots made for there equip. incorpoating either flame rods or U.V scanners

steam valve

@ September 13, 2013 4:00 PM in Condensate meter

The Old Spence amd hoffman press. reducing valves required a set horizontal pipe length coming off the outlet piping as well as the pilot piping, If the piping run was to short the valve may hunt and have a hard time maintaining lower outlet pressures.

pressure

@ September 12, 2013 10:24 AM in SYSTEM PRESSURE --need assistance,

Sounds like the good old systems , compression tanks allowed somewhere for the air to go,     what do you mean by self bleeders, if they are auto air vents they should be valved off after initial fill of system

solar

@ September 11, 2013 6:29 PM in What happened to all the solar thermal systems from 30-40 years ago?

I remember back in the mid 1970s congress passed the energy tax act which allowed home owners a 40% or more tax credit on solar system installs and additional 15% on insulating , not sure what tax credit was allowed for commercial installs,  this created an overnight appearance of solar companys, some legitimate some with non tested systems, the better systems still had the problem of storage when there was no sun. When President Reagan took office in the 1980s the tax act was dissolved. I remember solar companies going out of buisness with in days. The fact that some of these systems were never proven and that the life span of alot of solar hw panels is between 25-30 yrs may be the reason some of these old systems are being abandoned

guage

@ September 10, 2013 2:42 PM in Side Entry Pressure - Temperature Gauge?

Weil Mclain  (Pex Supply   sku- 510-218-099 )

Air

@ September 9, 2013 10:16 AM in Air compressors

I would use what we used for years for pneumatic controls,  Use a inline modular filter system, first a dirt filter than a oil filter (available at Graingers),  Than a refrigerated air dryer, also a auto or manual blowdown for the air compressor tank.

noise

@ September 3, 2013 10:37 AM in noisy belt driven Air Handler

Check the motor sheave ( you call it a pulley ),  is it ajustable, if so is it worn and grooved, this can cause noise.

smell

@ August 30, 2013 5:36 PM in Gas boiler smell

Sounds like it may be a flue draft issue,  is there fresh air into boiler rm , check to make sure the boiler rm is not in a negative pressure, neg. press. can be caused by bathroom exhaust fans and open boiler rm doors.  check to make sure flue cap is in place and the correct type, on a lot of old boilers it took a few minutes with the main burner on to create a draft up the flue. If your smell goes away after boiler fires that indicates flue draft.   check to see if there is any old soot build up,  you may be smelling this, hard to tell without being in the rm. I would call in boiler pro

smell

@ August 28, 2013 10:48 AM in musty odor from central ac system

Start at the evap coil, make sure the drain pan is clean, check that the drain is clean and everything is pitched and piped correctly (make sure there is a trap if needed )  there are products available for cleaning and treating pans.   I would start there

horsepower

@ August 21, 2013 11:17 AM in safety relief valve calculation

multiply your boiler horsepower by 34.5.      33,472 btus = 1 boiler h.p.

combustion air

@ August 19, 2013 10:53 AM in Furnace access

Rich is right, bathroom exh. fans can cause flue draft problems, i have seen it time and time again especially when a customer remodels a bldg and installs a restaurant with exh fans.  The right mechanical/furnace room should have a high and low opening to the outside preferably 1 inch per 1000 btus each 1 ft. off floor and 1 ft from ceiling.  these numbers will change if you have inside air combined with outside air. and a condensing furnace.   check your local mechanical code or the international mech. code ( pdf on yahoo )

pictures

@ August 15, 2013 11:07 AM in Power Plant Pics

great pictures , I love old plants and bldgs   If you get a chance visit the Henry Ford museum in Dearborn Michigan, they have a small version of an actual power plant in the museum18

direct vent

@ August 7, 2013 5:11 PM in Direct venting steam boiler?

I have used Tjerlund in the past,  they make a great product with excellent factory support

coil cleaning

@ August 3, 2013 12:43 PM in high head pressures

Techman has the right idea,  even though the cond. coil looks clean,  washing out the coil with a hose and some coil cleaner will alot of times drop the head press.  15-25 psig,  watch all that dirty water run out

leaks

@ July 30, 2013 9:09 PM in Leak seal

 One way is to press test with nitrogen, check with liquid leak det. solution. Another way is to use a good electronic leak detector while unit still has a refig charge or add nitrogen with a refrig. tracer.   There are dyes you can put into systems, I found they are messy and hard to get out of your guages,

sealers

@ July 30, 2013 3:12 PM in Leak seal

Had a bad exp.   used on a low temp Kramer hot gas defrost  R 404 system ,  ended up with restrictions in system

fire damage

@ July 26, 2013 5:34 PM in Fire Damaged Package Heat Pump Unit

I would be concerned about any soldered connections on unit, most fires reach well over 1000 deg F. some solders have a melting point between  750 -1100  deg.F. Some carrier units had a fusible plug on the suction line set to blow if temp./press. got to high.   There are several products to check condition of refrig. oil.    also any residual smoke smell may be trapped in unit and duct insulation  You should have a visual inspect. by a pro.

split

@ July 22, 2013 10:53 AM in low temp split

get all unit info 1rst    a fan curve will help you determine air flow, chances are the cond unit also has ajustable air flow data available, you will need a good tachometer.
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