Split Systems
How to avoid a common chiller design mistake
We were recently called out to a job site visit because the commons area and hallways of a multi-million dollar condominium building had humidity issues. These areas were being served by a chilled water make up air system; an air handler with a chilled water coil connected to a 20 ton split chiller (a 20 ton chiller barrel
Did you know that Rawal valves can help fix humidity issues?
For this solution to be successful, you will need to REDUCE the system airflow in addition to installing the Rawal valve. Lowering system airflow does TWO things: It lowers the evaporator temperature, which allows the evaporator coil to remove more moistureIt reduces sensible capacity which lengthens run time, which will remove more moisture CAUTION: A
3 Ways to Measure Airflow for Rooftops and Other HVAC Equipment
One of the most common reasons for rooftop service calls is incorrect airflow. Low airflow will often lead to frozen evaporator coils, low pressure trips, sweating ductwork and low capacity. High airflow can lead to condensate blowoff, high pressure trips, high humidity issues and more. As you can see, setting airflow properly at startup (and
How to Pipe a Single Circuit A/C with a Dual Circuit Evaporator Coil
If you’re installing a split commercial DX system, how do you know what kind of circuiting you need? And how do you install the piping and refrigerant specialties if there are more indoor circuits than outdoor circuits? The two most common circuiting options are a single circuit system (known as 2-pipe) or a dual circuit
How do you fix a humidity problem?
Humidity, the 8th wonder of the world, is a tough nut to crack. Unlike sensible heat transfer, it’s very difficult to measure its movement into buildings through cracks, doorways, and other openings.But, there are ways to combat these higher than expected humidity levels.Here are 11 ways to decrease the relative humidity in your space. The answer could be one of
How many tons of air conditioning is this DX or Chilled Water coil?
If you are measuring a Direct Expansion (DX) or Chilled Water coil in the field, or just quoting a replacement coil, you can quickly estimate its nominal tonnage based on the square footage of the FIN area of the coil. This is a useful “rule of thumb”, which will help ensure that you have all the
EER, IEER, SEER, IPLV, HSPF… What do all of these efficiency terms REALLY mean
EER, IEER, SEER, IPLV, HSPF… You have probably seen all of these terms before and never even thought of what the heck they stand for, or why you would care to look at one over the other. In order to look out for the best interest of the building owner, however, it is important that
Guardian – A Great Addition to Your Offering
Today’s residential HVAC replacement system buyers come in all flavors, but what we find is that most of them are looking first and foremost for a contractor that they trust. Internet searches, word-of-mouth, and great truck graphics may bring these consumers to your website or telephone! From that point on, it is up to the