Boiler Circulation Problems | Troubleshooting Hydronic Water Loops
This pump has a coupling device between the motor and the impeller.
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
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Two-Stage Gas Furnace Buyer Tips
Two-Stage Gas Furnace Buyer Tips - Two-stage gas furnaces make up over 30% of all gas furnaces installed in residences in the USA. Two-Stage gas furnaces are more efficient than single-stage gas furnaces in most cases. When purchasing furnaces always check the ARI website for and efficiency ratings and comparisons. (more…)
Modulating Gas Furnaces – Furnace Purchase Options
Modulating Gas Furnaces - Gas furnace manufacturers have for many years been working on modulating furnaces to make furnaces more efficient. Before modulating furnaces, the highest rated (efficiency-wise) were two-stage gas furnaces. Then came the modulating furnaces.
Efficiency ranges started increasing to 98% and fractionally more than 98% for some modulating gas furnaces. Always check the AHRI website for the certified efficiency of any HVAC product you purchase. What makes this furnace different than the other types of gas furnaces you can purchase?
Modulating gas furnaces are also condensing gas furnaces. All-natural gas and propane gas has a small percentage of moisture in the gas. When the combustion process takes place the moisture in the gas turns into steam. A condensing gas furnace has two heat exchangers.
In the secondary heat exchanger, any residual heat is absorbed into the exchanger, and the air passing around the exchanger. This maximizes the amount of heat used by the furnace. It also makes it far more efficient than a non-condensing gas furnace. That moisture is then drained down the same drain the air conditioner uses. The moisture produced by the evaporator coil.
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Gas Furnace Heat Exchanger Failure | Heating and Cooling
You can see the rust holes up near the sheet metal plates in this heat exchanger. This exchanger made the occupants sick.
Gas Furnace Heat Exchanger Failure - Richard, a technician just departed my house after looking at my gas furnace. My mom thought she smelled something so we called the furnace company we usually call when we need furnace maintenance to check it out.
He told us our heat exchanger in our furnace failed. I asked him how much it would cost to fix and he told me his service manager would call me with a price. I just got off the phone with the service manager and he said the furnace is still under warranty but we would have to pay for labor.
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Two-Stage Scroll Compressors | Refrigeration & Cooling
Scroll Compressor Inside the Condenser
Two-Stage Scroll Compressors
Two-Stage Scroll Compressors - For many years HVAC manufacturers used two compressors in their higher efficiency equipment to stage the air conditioner or heat pump for added efficiency. They would use a small compressor for the lighter loads or demands and then when the air conditioner or heat pump needed more demand the small compressor would shut down and the larger compressor would kick on to satisfy the demand. (more…)
Pressure Reducer Valves for Hydronics – Heating & Cooling Water
Pressure Reducer - Blue Arrow & Backflow Preventer - Red Arrow
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 cases, the pressure reducer valve or PRV is set to 12 PSI on most boilers. This is the proper boiler pressure needed for many residential and commercial boiler water loops. (more…)
Effects of a Clogged HVAC Air Filter | Dirty Filters
Dirty Filters will cause bad effects to your air conditioner or heat pump
What happens when your filter clogs up with dust and debris? The effects of a clogged HVAC air filter in your air conditioner or heat pump can cause failure of the system operation that will result in a call for an air conditioner repair service. Furthermore, dirty AC air filters can have a detrimental impact on your AC and heating systems.
An AC, heat pump, gas furnace, electric furnace, or even an oil furnace needs the proper amount air flow across the coil or heat exchanger to operate properly. Therefore, when the filter clogs the air flow is minimized the blower works harder and harder to pull the proper amount of air across the coil or heat exchanger. What are the effects of a clogged filter in your HVAC system? (more…)
How VAV Boxes Work | HVAC Zoning
How VAV Boxes Work? A Variable Air Volume box is typically installed in HVAC systems in commercial buildings and provides heating and cooling for occupants.
There are different types of Variable Air Volume boxes but how a Variable Air Volume box works is fundamentally the same from one Variable Air Volume box type to another.
Essentially a Variable Air Volume system allows an HVAC systems design engineer a way to zone large areas in workspaces such as office buildings and other places where there are large spaces that need heating and cooling or simply just cooling in rare cases.
Furthermore, the concept is simple but making it energy efficient and keeping everyone comfortable has taken some time from the inception of the Variable Air Volume box.
How to Wire an Air Conditioner for Control 5 Wires
What you will learn from the How to Wire an Air Conditioner for Control 5 Wires article:
- This article includes a comprehensive table showing thermostat wire terminations for an air conditioner and a source of heat that includes five wires
- A detailed description of where each wire goes in the air handler and condenser and what it controls
- A detailed diagram illustrating where the wires go for 5 wire air conditioner and heating system control
- Lastly, resource and related links to help you with wiring and installing a thermostat
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