Posts Tagged ‘steam boiler’
Due to difficulties in obtaining some machined components and because of declining sales, the M&M Series 150E Low Water Cut-Off and all its variants are being discontinued as of December 31, 2009. This will impact the 150E, 1507E, and replacement heads for those products.
M&M recommends the Series 150S float style Low Water Cut-Off as a direct replacement for the 150E and the new 1575 as an alternative for clients that wish to continue using a probe-style device.
From a replacement parts perspective, the 150S replacement head will bolt directly to an existing 150E body. Some minor wiring modifications may be required, and the user should be aware that the time delays and the pump differential are not adjustable on the 150S. Keep in mind that it is also good practice to use a relay between the 1501S and the boiler feed pump.
A couple of weeks ago I attended a CSD-1 meeting in Florida put on by the State Fire Marshall’s Office with presenters from the National Board. CSD-1 is the national standard for controls and safety devices for automatically fired boilers. This standard has been adopted by most states (if not all) and deals with the assembly, installation, maintenance, and operation of controls and safety devices on automatically operated boilers directly fired with gas, gas-oil, or electricity, having input ratings of under 12,500,000 Btu/hr.
While this is not one of the more enjoyable meetings I have attended, it was very informative. If you are working in the boiler trade within your state I would strongly suggest that you attend these meetings when the opportunity presents itself.
Understanding the who, what, when, where, and why of the regulations of boilers within your state will allow you sales opportunities you may not be aware of. Also it is good to know the regulations regarding who can work on these potentially dangerous systems. In most states the adoption of boiler safety laws are voted on by politicians, most of whom may not know the potential dangers of a boiler. It is up to you to guide these folks in the proper direction when it comes to your livelihood.
It’s that time of year. The college and professional football seasons have started, and the days are going to get shorter and the temperatures cooler. While talking sports in my part of the world is like talking politics in mixed company, let’s just say my favorite college team is continuing its winning ways, and my favorite professional team has dropped a game already. With the cooler temperatures coming it’s time to check out those heating boilers to make sure they are safe and running properly for the upcoming heating season. Safety is always a prime concern for all of us who deal with boilers. A quick and efficient way to maintain this safety is the use of a boiler emergency stop button. With a single push of the button, electrical power is dropped to the boiler. This boiler emergency stop button is available in two forms, the BSB-1 and the BSB-2. Each kit contains the switch housing, a 40 mm push -pull red button, a NC contact, and a legend plate stating Boiler Shut Off. The BSB-2 has the option included that allows for an illuminated switch.
There is nothing more frustrating than trying to start your boiler or burner; you hear the fan start, patiently wait for the sound of your ignition transformer to kick in and the roar of your burner light off, and nothing happens. The most likely cause of this problem is that your combustion air flow switch is not making.
The airflow switch is a burner/boiler safety device that proves (makes sure) that the combustion blower is running and providing the minimum amount of air pressure for safe light off, before we try to light off the burner. The airflow switch is wired in the preignition interlock circuit of a flame safeguard control. The sequence in which things happen is critical for safety in a combustion control system. The airflow switch being in the preignition circuit tells us that this switch must be made before the sequence can continue to ignition,which is why the combustion blower comes on and nothing else happens when the switch is not made. It could be very dangerous to open our main gas valves, allowing gas into the combustion chamber without having the necessary air flow that the combustion blower provides for proper and safe operation.
You can see “How to troubleshoot the combustion airflow switch” on Stromquist TV. Matt walks us through the steps of troubleshooting the airflow switch which include: 1) making sure the combustion blower is turning in the correct direction (you might laugh but it is one of the biggest causes of airflow switch problems our tech people get at Stromquist) 2) make sure your hook up tubes are the right size and not clogged 3) make sure your differential pressure is set properly. We like to use the Testo 510 ( available at Stromquist & Company) to set up our switches.
Differential pressure is an interesting subject in its own right. Not only is it used to prove things like air or water flow, but we also use it to measure flow. Put a know restriction in a pipe with flow.which creates a pressure drop, add an differential flow transmitter like the Honeywell STD900 or STD3000 and you have a very accurate method of measuring flow.
For more information on using DP ( differential pressure) to measure flow check out the following videos:
Meaning of DP transmitter high and low pressure ports
Back to Basics: DP Flow Measurement
If you are a Stromquist customer or are in GA or FL, call your Stromquist rep for help with your combustion and flow needs. All others, please refer to one of our affiliates at the Controls Group North America site to find a distributor in your area.
Matt shows us some tips for making sure our combustion air flow switch is working properly. Please note combustion systems can be dangerous and only qualified burner/boiler contractors should work on these systems.
Honeywell has finally released the “NEW DELPHI COMBUSTION EFFICIENCY PANEL”.
This NEW panel will allow for a single panel to provide a loop and logic based integrated flame safeguard control and fuel-air ratio control, complete with O2 trim compability for burner and boiler applications. This panel also provides a simple to use touch screen panel for the boiler operator.
I am also excited and PROUD that Stromquist has a pending order for FIVE of the first DELPHI PANELS to roll off the production lines at Honeywell.
I will keep you up to date on information and the progress of this new product and the installation of the five new panels as soon as possible. So keep a sharp eye out for information on ”Bill’s Blog”.
Originally announced June of 2008 we at Stromquist felt it necessary to post this as a reminder of the obsolescence of the Honeywell C7015 Infrared Flame Detectors.
The C7915 flame detector will be replacing the C7015 Flame detector. The C7915 series is applicable to the 7800 SERIES of burner controls using the R7852 flame amplifiers.
Please note: the C7915 will NOT work with the R7248 amplifiers, if you are replacing a C7015 with a C7915, the burner control will also have to be upgraded.
Contact your Stromquist and Company Representative for more information.
The latest accurate information and demos on products
