11-Month Report

Discussion in 'Maintenance and Troubleshooting' started by Jamesck, Jan 15, 2012.

  1. Jamesck

    Jamesck Member

    This split unit was started almost a year ago and this is where it is currently performing.

    Carrier 50YDS049 with FV4006 upflow AHU and 15KW Aux (only 5-kw wired in)
    800' of vertical closed loop with 20% methanol.

    Outdoor temp 35 degrees
    Indoor temp 72

    Water temp in 42 degees
    Water out 38 degrees

    Water Pressure 35 PSI In
    Water Pressure 28 PSI Out

    I took the above readings in 1st stage. In order to keep unit running I bumped tstat one degree and the air temps were taken in 2nd stage

    Air Temp out 95 degrees
    Air Temp in 71 degrees

    This unit runs 75% of time in 1st stage but will bring in 2nd stage at day break, or if thermostat is raised from set point. I have seen Aux on only once or twice. I hope that I will not have to wire in the other 10KW of strip heat before the end of winter. Most of the house is very comfortable and I really like the varible speed air flow.

    I took all of the above with the desuperheater wired and running and I know that is not suppose to happen. I am very pleased with this units performance and am a firm believer in the payback capabilities of these systems.

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