HWS Laboratory Event Log - Phase 2

All systems under ASHRAE 90.2 (64.3 gpd) draw profile schedule.

6/22/10 Heat Pump Water Heater was connected and started on Default Hybrid Mode. Initial 2.6 Amps @ 10:50AM, 2.9 Amps at 11:50. Shed temp 87.1 F HP discharge air temp 67.5 F.

6/23-6/30/10 Disconnected bottom element to 50 gal on ICs system. A series of thermostat adjustments were made to bring water temperature to ~120 F.

7/1/10 Replaced flow regulator on reference 50 gal. electric water heater.

7/1-7/2/10 Replaced flow regulator on Pv flat plate solar system and installed new SID20 pump with 20 Watt PV panel.

7/6/10 Lowered thermostat setting on ICs/50 gal. system due to 128 F delivery temperature deviation shown on July 5th resulting in higher electric demand (6.9 kwh).

7/14/10 Heat Pump Condensate measurement added (ch 53) at 4:30 PM -- grams of water.

7/30/10 HWS Lab Relative Humidity (RH%) sensor added at noon (12:00 pm), installed on north wall at 56 inches from floor (about same height as HP compressor).

8/9/10 Turned ICS/50 gallon tank upper element thermostat up a notch (...having trouble dialind 125F setpoint).

8/12/10 Installed 2nd 20W PV module (now 40 watt) to SID20 pump with string diode arrangement for overvoltage protection.

8/16/10 Adjusted ICS/50 gallon upper element thermostat up again. Made adjustment to PV pumped system mixvalve down slightly.

9/10/10 Begin standby loss testing on Nat. gas 40 gallon tank.

9/14/10 Repositioned gas meter pulset at ~1:30 PM.

9/17/10 Downloaded new HWS_SEP_HP.csi program to logger at 5:14 PM.

9/22/10 Thermostat set to ~130 on Nat. gas tank.

9/27/10 R-11? wrap installed over electric 52 gallon reference tank. Thermostat setting remains same ~120F.

10/4/10 Downloaded ASHRAE 90.2 DRAW schedule program to logger at 11:00 AM.

10/11/10 R-11? wrap removed from electric 52 gallon reference tank (late afternoon).

10/21/10 Downloaded NREL/BA draw schedule HWS_OCT_HP.csi program to logger at 4:45 PM.

11/1/10 Downloaded ASHRAE 90.2 draw schedule program to logger at 10:00 AM. Replced flow regulator to Diff. controlled solar ssystem.

11/17/10 Tankless Nat. Gas turned OFF for flush pump preparations.

11/18/10 Tankless Nat. Gas was flsuhed with white vinegar for 2 hours to flush heat exchanger.

11/22/10 Downloaded NREL/BA draw schedule HWS_NOV_HP.csi program to logger at 11:00 Am.

12/3/10 Downloaded ASHRAE draw schedule Program to logger at 4:30 Pm.

12/20/10 Downloaded NREL/BA draw schedule HWS_DEC_HP.csi program to logger at 4:45 PM

1/5/11 Downloaded ASHRAE draw schedule Program to logger at 11:30 am.

1/12/11 P/T Valve leaks on heat pump noticed.

1/14/11 P/T Valve leaks on heat pump. 163.5grams of water over 24hr period.

1/18/11 Downloaded NREL/BA draw schedule Program to logger at 4:30 Pm. Installed/test differential controller to PV solar system

1/21/11 Installed Differential controller to Solar Flat Plate PV pump System.

2/1/11 Downloaded ASHRAE draw schedule Program to logger.

2/4/11 Begin ICS/50 tank thermosat adjustment to lower temperature.

2/14/11 Downloaded NREL/BA draw schedule Program to logger at 3:00 Pm.

3/2/11 Heat Pump water draw malfunction on logger controls-- troubleshoot starts (see 3/8/11)

3/3/11 Downloaded ASHRAE draw schedule Program to logger at 10:00 am.

3/4/11 Flow meter replaced on Heat Pump Water heater, removed check valve out of incoming city water (cold inlet).

3/8/11 Trouble shoot all day found short on flow meter line caused by heat shield during solder of copper piping.

3/17/11 Downloaded NREL/BA draw schedule Program to logger at 4:00 PM.

4/1/11 Downloaded ASHRAE draw schedule Program to logger at 11:00 am.

4/15/11 Downloaded NREL/BA draw schedule Program to logger.

5/2/11 Downloaded ASHRAE draw schedule Program to logger.

5/17/11 Downloaded NREL/BA draw schedule Program to logger at 3:00 pm.

6/1/11 Downloaded ASHRAE draw schedule Program to logger AT 4:15PM. Expansion Tank removed from Solar differential system.

6/2/11 Downloaded NREL/BA draw schedule Program to logger at 4:30 for further testing post removal of expansion tank.

6/8/11 Secondary flowmeter on Differential controlled solar system was replaced with pos. displacement meter at 4:00 PM.

6/10/11 Removal of expansion tanks on both PV pumped and ICS/50 solar systems at 9:30 AM.

6/13/11 Secondary flowmeter on PV Pumped solar system was replaced with pos. displacement meter at 3:00 PM.

6/16/11 Differential Solar system repairs end (6/9- 6/14). Good data resumes June 15.

6/17/11 Flow regulator replaced on Tankless Nat. Gas system at 2:30 PM.Clogged regulator cause limited firing on unit for previous 12 days.

6/23/11 Flow meter calibrations 10:AM - 5:00PM. Flow regulator replaced on PV solar system and Standard 50 gal waer heater.

6/24/11 Flow meter calibrations continue 10:AM - 4:00PM.

6/27/11 Expansion tanks on two solar flat plate systems re-installed for test.

6/28/11 Expansion tanks on two solar flat plate systems removed at 4:30 PM. Solenoid replaced on 50 gal. electric water heater.

7/15/11 Downloaded NREL/BA draw schedule to logger at 4:30pm.

8/1/11 Removed insulation from ICS collector at 9:45AM. Downloaded Ashrae draw schedule to logger at 4:00pm.

8/16/11 Downloaded NREL/BA draw schedule to logger at 4:30pm.

8/18/11 Replaced flow regulator on baseline electric 50 gal wth a cleaned used regulator.

9/6/11 Downloaded ASHRAE draw schedule to logger at 10:50 Am.

9/16/11 Downloaded NREL/BA draw schedule to logger at 4:30 Pm.

9/28/11 Failure with HPWH inlet temp sensor

10/5/11 Downloaded ASHRAE draw schedule to logger at 4:45 pm.

10/19/11 Measured HPWH airflow (130 cfm). Downloaded NREL/BA draw schedule to logger at 4:45 Pm.

10/24/11 Replaced Multiplexer with a new one (morning)

10/28/11 Enclosed HPWH in 92.5 cu.ft. space around 4:30 PM

11/7/11 Removed HPWH closet enclosure at 9:00 AM

11/10/11 Downloaded ASHRAE draw schedule around 4:30 PM

11/18/11 Downloaded NREL/BA draw schedule at 2:50 PM

12/8/11 Downloaded ASHRAE draw schedule at 10:30 AM

12/15/11 ICS/50 + HPWH installed Now system #3 (No power 'til Dec 19); Std 50 gal electric installed Now system #7 (no power until 12/20)

12/20/11 First full data for ICS/50 + HPWH hybrid system

12/21/11 Downloaded NREL/BA draw schedule at 10:50 AM; Installed cap + wrap to standard 50 gal electric (sys #7)