Vital to the operation of the refrigeration cycle, superheat must be maintained and stable to protect the compressor.  We all know that the heart of the system cannot compress liquid (slug) without bad things happening.  This would represent low/no superheat.  But, did you know high superheat can cause valve and compressor problems as well?  No matter the reason for attaching your gauges to the system, you must check the superheat, in the air-conditioning cycle.

Read More

Views: 604

Comment

You need to be a member of Home Energy Pros to add comments!

Join Home Energy Pros

Comment by Bob Blanchette on January 16, 2014 at 2:12pm

Depends on type of system. TXV and Fixed orifices have different charging methods. As Steven stated airflow needs to be addressed, in many systems it falls WAY short. 3+ ton systems seem to be the worst offenders.

Comment by Steven Lewis on January 16, 2014 at 8:12am

Super heat readings without knowing airflow only gives you 1/2 the equation.  Dirty filters/ low airflow/refrigerant overcharge/low temp in building or low outdoor temp will all affect the superheat of the system.  If the superheat is out of range (high or Low) then the cause needs to be determined and corrected.  We all say that the house is a system but in HVAC  I say everything is Relative.  When you change one condition, it effects everything else, so it not the superheat temp but how it relates to the other information you gather.  As an example an A/C can have a high super heat of 20 if the indoor temp is high 88+ and outdoor temps are high as well and then when the unit has the house cooled down and running under normal conditions the superheat will be in normal range ( approx 8)  If you tried to charge the unit to reach the 8' you  would have vastly overcharged the system and dramatically raised its operating costs and shortened it life while making the homeowner uncomfortable as well.

Comment by Eric Kjelshus on January 10, 2014 at 6:34pm

I had a printer ask for just 2' superheat +-1'  to keep the paper very dry and never shut down the air handler/AC unit no case heater.    Most ask for 8'+ up to 30' superheat  next to the compresser.  so whats the deal?

Videos

  • Add Videos
  • View All

Latest Activity

Michael Woodham posted a photo

Shelves & Cabinets Maker - Spaceworks Design

Renovate your Home & Office by installing Shelves and Custom Cabinets!Stunning Home &…
5 hours ago
Thermodyne Boilers posted a discussion

Major problems which can cause troubles in Boilers

Most boilers come with a manufacturer’s warranty.…See More
5 hours ago
Kevin Daly added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Minneapolis Blower Door Model 3 for sale

Selling minimally used Minneapolis Blower Door DG-700 model 3. Includes model 3 fan, DG-700…See More
11 hours ago
Profile IconDamon Morales, Thermodyne Boilers, Michael Woodham and 1 more joined Home Energy Pros
19 hours ago
marius gherman posted a video

Winter conditions, perfect operation - ROTEX / DAIKIN heat pump

FIAMMA company, ROTEX partner in Romania, offering turnkey packages to improve energy efficiency, from supply to installation. With an experience of over 25 ...
19 hours ago
Profile IconJeffery Liang and Ellen Phillips Soroka joined Home Energy Pros
Friday
Charles Cormany added a discussion to the group Job Board
Thumbnail

Energy Efficiency Incentive Program Manager - Efficiency First California (Berkeley)

Position Title: Program Manager Terms: Full time, available immediatelyAbout Efficiency First…See More
Thursday
Charles Cormany joined Diane Chojnowski's group
Thumbnail

Job Board

This group is for posting jobs related to all aspects of the home performance industry including…See More
Thursday

Home Energy Pros

Welcome to Home Energy Pros – the unique digital community by and for those who work in the home energy performance arena.

Home Energy Pros was founded by the developers of Home Energy Saver Pro (supported by the U.S. Department of Energy) and brought to you in partnership with Home Energy magazine.  Home Energy Pros is sponsored by the Better Buildings Residential Network. Please honor our Guidelines

© 2017   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service