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Thread: Checking numbers
07-29-2012, 08:32 PM #40Professional Member
- Join Date
- Mar 2008
I was a little worried with the amp draw at 12.5 and still getting into the hottest part of the day. The FLA was 14.4
07-29-2012, 10:37 PM #41Gary
An engineer designs what he would never work on.
A technician works on what he would never design.
07-29-2012, 10:39 PM #42
BTW, looks like the high suction pressure isn't really high in this case. There's a huge difference between a cap tube system and a high efficiency TXV system.
Last edited by hvacrmedic; 07-29-2012 at 10:55 PM.
07-29-2012, 11:26 PM #43Professional Member*
- Join Date
- Jan 2012
- WEST COLUMBIA S.C.
With103 outside system seems to be okay.Remember design conditions are 95 od 75 id with 50% humidity
07-29-2012, 11:57 PM #44
Cooling Standard: 80°F (27°C) db 67°F (19°C) wb indoor entering air temperature and 95°F (35°C) db air entering outdoor unit.
I cut and pasted that to make sure I got it right.
Design conditions (Manual J) depend upon the location and local codes. Maybe that's what you were referring to? Yep, they don't tend to keep up when design conditions are exceeded, unless they're over-sized like mine. It stays 75° in my house even when it's 110° out. In my book it's sized just about right, and it wasn't by accident either.
Last edited by hvacrmedic; 07-30-2012 at 12:20 AM.
07-30-2012, 08:30 AM #45
Lennox uses the approach method in conjunction with subcooling for charging. Their approach temperatures are below 10 degrees. Check the installation instructions for Lennox AC units.Aircraft Mechanical Accessories Technician. The Air Force changed the job title to Air Craft Environmental Systems Technician. But I've decided I'll always be a Mech Acc.