Lighting a Pilot that is Electronic Ignition

Lighting a Pilot that is Electronic Ignition – This is one of many questions we get by email.

Lighting a Pilot that is Electronic Ignition Comment: Thank you for your interesting discussion of pilot lights vs. electronic ignition. I may have to replace my gas water heater soon and am weighing the options. Although I understand that electronic ignition is more efficient, I worry about not having hot water during a power outage. A number of years ago we had an ice storm and the power was out for almost a week. My gas water heater still worked as did my gas stove, and that really made a big difference when the temperature inside the house was in the 30’s. Is there any way to light a water heater with electronic ignition by hand or is it completely dependent on electricity? Thanks for any information you can provide. (more…)

Hot Water Boiler Sequence of Operation Aquastats

What you can expect to learn from Hot Water Boiler Sequence of Operation Aquastats article:
1) about sequence of operation for boilers
2) basic sequence of operation for the typical boiler
3) boiler controllers and boiler control strategies
4) hot water boiler sequence of operation conclusion
5) lots of resource and related links to help you take a closer look and learn more. (more…)

How Does an Expansion Tank Work |HVAC Hydronics

How Does an Expansion Tank Work – What is an expansion and how does it work? I get that question all the time even though I have written an extensive article on expansion tanks.  The two most common expansion tanks you will see in HVAC applications include the bladder type expansion tank and the steel type expansion tank.  The steel type expansion tank needs some basic maintenance from time to time to ensure it doesn’t become waterlogged or overfilled which would defeat the purpose of having an expansion tank. For more on the basic maintenance of a steel expansion tank and how to properly fill it check out this article. (more…)

Boiler Commissioning & Functional Testing – Quality Assurance

Boiler Commissioning & Functional Testing - Quality AssuranceBoiler Commissioning & Functional Testing – Commissioning (Cx) any type of HVAC equipment is many different procedures from the beginning of the commissioning process to the end of the process. One of the most important procedures during the Cx process is functional testing. The functional testing always precedes the final testing where a test of all the combined equipment is done in an integrated systems testing. Once successful testing is completed and all discrepancies corrected a final commissioning report is generated including all the test data and information collected during the entire process of testing and commissioning. (more…)

Boiler Circulation Problems | Troubleshooting Hydronic Water Loops

Boiler Circulation Problems | Troubleshooting Hydronic Water Loops

Boiler Circulation Problems | Troubleshooting Hydronic Water Loops – Richard, we have a hot water boiler and we are having problems with the circulation of the water. The radiators are cool and we don’t seem to have good heat. The boiler seems to be working fine but the radiators are cool. Can you give me some insight into my boiler circulation problem? Kate

Boiler Circulation Problems | Troubleshooting Hydronic Water Loops (more…)

Pressure Reducer Valves for Hydronics – Heating & Cooling Water

Pressure Reducer Valves pressure reducer valve and backflow preventer

Pressure Reducer – Blue Arrow & Backflow Preventer – Red Arrow

Pressure Reducer Valves for Hydronics

Pressure Reducer Valves are used for boilers to decrease the pressure supplied to the boiler from the  make-up water feed. The make-up water feed originates from the city water source or well water source. The same water source you use for showering, washing dishes, and sometimes drinking water depending on the quality. In many case the pressure reducer valve or PRV is set to 12 PSI on most boilers. This is the pressure needed for many residential and commercial boiler water loops.

Pressure Reducer Valves and Make-up Water

In most cases, the make-up water supply is 40 or 50 psi and higher and this will exceed the safety rating of the lower pressure requirements of the boiler water loop. It will also exceed the pressure rating on the pressure relief valve on most residential boilers. For this reason a PRV or pressure reducer valve is needed to decrease the pressure supplied to boiler. (more…)

Why Does My Steam Boiler Run Out of Water | HVAC Heating

Why Does my Steam Boiler Run Out of Water?

Why Does My Steam Boiler Run Out of Water - automatic water feeder steam boiler

Automatic Water Feeder for Steam Boiler

All boilers need a constant supply of water from a make-up water source. In a steam boiler system there are vents that vent condensation. The vents can be found on the radiators and throughout the pipe system especially on large systems that serve larger buildings. Venting is limited to a small amount of the entire H2O and steam volume inside the piping and radiators but does need to be replaced. Most of the steam condenses and is returned to the boiler through the return piping system either by gravity or a condensate pump. As the system uses steam it vents the condensation or steam and this displaces water from the steam system that needs to be replaced and the replacement H2O comes from a make-up water source. (more…)

How to Clean Gas Boiler Burners | HVAC Maintenance

How to Clean Gas Boiler Burners – Maintenance

The Burners under this small boiler are round and extend under the boiler

Before beginning boiler maintenance or repair including cleaning the gas boiler burners on any boiler it is important to follow all safety procedures. Turn off the gas to the boiler at the gas cock located on the gas line and turn off the gas valve on the boiler. Additionally turn off the main power to the boiler at the circuit breaker.

How to Clean Gas Boiler Burners – Periodically it helps to check and clean the gas boiler burners for a couple of reasons. First of all it ensures the burners are in proper mechanical order and that the burner will reliably do the job of properly and evenly burn the gas in the combustion chamber of the gas boiler. It also adds life to the gas boiler burners if the burners are properly cleaned. So the benefits of cleaning the burners helps keep the boiler running and adds life to the gas boiler system. This article DOES NOT apply to condensing boiler systems and it is recommended that you hire a plumbing or HVAC professional to perform periodic maintenance on condensing boilers as condensing boilers are more complex than the atmospheric boilers referred to in this article. Additionally, Pulse type gas boilers will also require the attention of a trained professional for periodic maintenance. (more…)

Types of Boilers | HVAC Heating and Cooling

Types of Boilers

There are many different types of boilers in the boiler room today in a variety of heating applications. There are two main categories of boilers among the different boilers and those two categories are steam boilers and hot water boilers. Either of those categories can be fueled by oil, gas, or electric (although electric is uncommon for steam boilers). They have different designs and piping configurations as a steam boiler system is designed to turned the water into steam and uses gravity and pressure to deliver the heat and the hot water boiler systems are designed to simply make hot water to be circulated (by a circulator pump) through a piping system to provide heat. Typically, hot water boilers are more efficient than steam boilers for a few reasons. First, there is less heat loss throughout the hot water piping and the shell of the boiler because the hot water boiler operates at a lower temperature than the steam boiler. This means there is less heat loss throughout the entire boiler and piping system. Secondly, because the hot water boiler operates at a lower temperature, it requires less fuel or energy to convert into heat. What kind of boiler do you have in your boiler room?

Boiler Efficiency Options | Buyers Advice

Boiler Efficiency Options
Boiler Efficiency Options – High Performance HVAC wants to help you understand your next boiler purchase better. To do this we want to break down all the different types of boilers and components, and various options and features that you may find when making a purchase. Typically you want to find a like replacement for the boiler you currently have installed or if you are buying a new boiler you want system that will handle the load and is durable. The most important feature about the new purchase is usually the fuel efficiency simply because the cost of running the new system will give you pay back over time for the new purchase.
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