Squeezing a few more degrees!

Discussion in 'Maintenance and Troubleshooting' started by rebelrobin, Jan 10, 2011.

  1. rebelrobin

    rebelrobin New Member

    I have a 3 ton TETCO closed loop system. My EWT is 41, LWT is 35. EAT is 68 and LAT is 88. Water flow is at 7 GPM. Ducting CFM is around 1100. Fan at medium. I have been trying to get a few more degrees from the unit but am at a loss for what to try next. Could the factory default orifice piston be the wrong size for my application? Will it change the output enough to offset the cost of parts and recharging? (TETCO lists the orifice is sized for EWT of 50 degrees). I'm checking the coils tonight for dirt. Thanks!
    Robin :(
  2. AMI Contracting

    AMI Contracting A nice Van Morrison song Industry Professional Forum Leader

    These numbers don't sound horrible for an economy heat pump. I would not suggest a major investment to eek out a few more degrees as long as home is heated. If you can't get to set-point on the thermostat, we need to go over system design.
  3. rebelrobin

    rebelrobin New Member


    Thanks J. I did find a few air leaks near the thermostat that was preventing the furnace from cycling. Also, adjusted some air ducts. Surprising how sensitive it is to flow and leaks.
  4. geome

    geome Member Forum Leader

    Not to mention the hole behind the thermostat...
  5. rebelrobin

    rebelrobin New Member

    no hole

    Geome, No hole behind my thermostat, I have a new constructed log home attached to a 100 year old farm house. Talk about a leaky monster!
  6. geome

    geome Member Forum Leader

    Guess I still hold the record with roughly 4" x 1" hole! I stuffed it with some left over Armaflex scraps. In 15 years when I paint (maybe), I'll seal the drywall in a more permanent fashion. At least it doesn't show. :)

Share This Page