It’s only a lost art if no one shows you how. Come learn about pneumatic controls at the best “hands on” training class at Stromquist & Company. Space is limited so sign up now!
Pneumatic Controls Training Comes to Atlanta
January 24, 2013 by 4 Comments
Control Talk: Interview with Dieter Schill from Millennial Net Part 1
November 15, 2012 by Leave a Comment
Millennial Net makes really cool wireless products including a wireless pneumatic thermostat that allows a building owner the ability to the energy saving and monitoring benefits of a DDC or building automation controls system without having to give up the advantages a pneumatic control system offers.
Stromquist & Company is thrilled to be stocking and selling this innovative product line.
Cv and What It Means to HVAC Contractors
September 26, 2012 by Leave a Comment
There has been a lot of buzz on Control Trends lately on Cv so I thought I would do my best to explain what Cv is and how does it relate to HVAC systems.
NOTE : I am not attempting to be exact on definitions only practical in field use of the Cv information.
Based on water (media for most HVAC applications) [Read more...]
A look at Siemens
August 8, 2012 by 1 Comment
Over the years Control Trends has given you a look at various manufactures of controls and their products. I came across this video the other day that is quite unique in it’s own rite. And you know, it’s time to give Siemens some good old Control Trends Love… We know them… we sell them now let’s look into Siemens a little deeper.
In the HVAC world Siemens supplies Thermostats, Sensors, Controllers, Valves, Damper Actuators, VFDs, Switches and Realys, and so much more. In the future I will be bringing to you (being an old boiler guy) a look at the Siemens controls that deal with the boiler side of our industry. But for now enjoy the “primer” and let’s give Siemens the love they deserve.
HVAC Controls Product Review: Millennial Net Wireless Pneumatic Thermostats
June 10, 2012 by 3 Comments
I am posting this for Dieter Schill. Dieter is the president and CEO of Millennial Net. I was unfamiliar with Millennial until Dieter made a comment regarding the Controltrends post “Results of Controltrends 2012 Pneumatic Controls Survey“. Because of Dieter’s comments and because Controltrends is interested in all HVAC control products, I asked Dieter if he would like to educate the Controltrends community on the Millennial Net Control offering. Our sponsor Stromquist & Company does not handle Millennial Net; it looks like a very cool and innovative product offering. If you have used these products, PLEASE PLEASE, tell me about them in comments. I am very curious about this product line.
The following is from Dieter:
Millennial Net Wireless Energy Management Solution Description [Read more...]
Honeywell Pneumatic and Electronic Globe Style Control Valves
June 10, 2011 by 1 Comment
Read any Honeywell catalog on control valves and most likely you will end up with red eyes and possibly a bald spot on top of your head from scratching it in frustration.
Not Just the Hard to Find Parts
April 6, 2010 by Leave a Comment
Many people think of Stromquist when it comes to buying those “hard to find” parts — the old or obsolete parts or those that just aren’t very common. We’re well known for our great counter and inside sales staff who find matches and replacements for such items. While we do appreciate that you think of us for these, we want you to also think of us for those everyday, run of the mill parts like thermostats, valves, gauges and sensors. Some people automatically go to the bigger supply house chains for these types of parts and only come to Stromquist for the more elusive items. So we would like to ask that you give us a try on your “regular” parts too. We stock a wide range of Honeywell, Johnson Controls, Schneider Electric (formerly TAC/Invensys), Belimo, White Rodgers and many more. And we’re competitive on our pricing. The next time you need that simple thermostat, a relay or pneumatic fittings, give us a call. We’d be happy to pull one off the shelf for you in addition to finding the replacement for that rusty part that’s 25 years old.
Pneumatics Troubleshooting
February 10, 2010 by Leave a Comment
Even with all the great new technology in HVAC controls, there are still many pneumatic buildings out there. If you happen to be someone who has to work on pneumatic controls, you know it can be frustrating when you have a problem with the system. Here’s a good troubleshooting procedure from Jerry Condiff, the instructor who teaches a great pneumatics class for us here at Stromquist every year. Jerry has been in the HVAC controls field for over 30 years and really knows pneumatics.
Pneumatics Troubleshooting Procedure
Start at the thermostat or controller. Check to see if the thermostat will put out a high pressure by turning the set point to its minimum setting. The pressure should be high on the output gauge. If not, try adjusting the calibration screw.
If no air noise is distinguished, check to see if air is present in the supply line into the thermostat (this will require removing the stat from the mounting bracket). If supply air is present but there is no air bleed noise or output pressure, the restrictor is plugged or the nozzle at the bleed port is dirty. Check and clean the nozzle or clean out the restrictor.
If there is no pressure output but air bleed noise is present, check for an air leak behind the mounting bracket. Check the air hoses that are connected to the mounting base for deterioration. Check Honeywell stats for broken plastic air nipples in the back of the mounting base.
If no air leaks are found, plug the branch line of the stat with a jumper hose connected from the supply line to the main or supply to the stat. If pressure builds on the branch gauge, the branch line of the controlled device (valve, damper or pressure switch) has a leak. You may also make up a tool consisting of two 5/32 lines and a barbed gauge tee and a 30# pressure gauge. Connect one end of the hose to supply and the other to the branch port on the mounting base. If you do not read any pressure on the gauge, the branch line has a leak. If pressure builds, the stat is bad and will need to be replaced. Use a squeeze bulb and gauge to check controlled device diaphragm for leaks. If no leaks are present, the branch line hose has a leak and needs to be replaced.
This procedure may not cover every potential issue you run into with your pneumatic system, but it should at least be a good start, and I hope you find it helpful. Happy troubleshooting!
Calibrating a Pneumatic T-Stat
December 28, 2009 by 1 Comment
- Determine the throttling range for your control system. Let’s use 3-13#’s as an example.
- Next measure the ambient temperature at the thermostat with a precision temp meter.
- Adjust the setpoint knob on the T Stat to the current ambient temperature.
- Pull the branch line off the T-Stat and T tap a gauge between the T-stat and branch line.
- Adjust the calibration screw in the T-Stat until the branch PSI reads zero.
- Now adjust the calibration screw in the opposite direction until the branch pressure reads mid range. In this case our differential is 10#’s of pressure, so (13-3)= 10(diff) /2 or 3+5 = 8 psi.
- Verify the box damper and reheat valve(if applicable) are both closed. Fine tune if needed.
- Remove your calibration gauge and replace the branch line back onto the T-Stat.
- Adjust the T-Stat to the desired setpoint.
Your T-Stat is now calibrated…
Stromqust TV: Pneumatic Tool Kit
August 19, 2009 by Leave a Comment
Take a look at the tool kit we’ve designed for commercial and industrial control field professionals.
Visit Stromquist.com to order your kit.
