1.    Unplug the meter from the outlet.

2.    Detach the inside unit from the outside unit by disconnecting the black, white, and green wires from
       the cable that connects the two units.  In some cases, the connections may be inside the meter.
       You may be able to get to them by simply removing the black grommet where the cable enters the
       meter, and pulling the cable out of the inside unit.  DO NOT USE EXCESSIVE FORCE TO DO
       THIS.  If you are still unable to reach the connections, remove the ten black allen wrench screws
       on the cover and disconnect the cable within the unit.

3.    Take the black and white wires coming from the inside unit and wire them together.  The cable
       going to the outside unit should be disconnected, as well as, the green wire going to the inside unit.

4.    Plug the meter back into the outlet.

5.    For the best results, the test should be run for 24 hours.  If your meter does not add any counts in
       the first 45 minutes, check the connections and try again.  If it still does not add any counts refer
       to the test result indications below.
 

TEST RESULT

•     The correct results for the F-90 is 3-5 counts per hour or 100 counts in 24 hours.

•     The correct results for the F-90H is 3-5 counts per hour on both the 'heat only' counter and the 'heat and hot water' counter, or 100 counts on both counter in 24 hours.

•     Example]    If the test is run for 3 hours, the meter should accumulate 11-13 degree days.

•     The longer the test is run the closer the average counts per hour will be to four.

•     If your F-90 produced the correct test results and the cable & connections seemed to be in good condition, send the outside unit to our service center for recalibration. Click HERE for shipping instructions.

•     If your F-90H produced the correct test results, send the outside unit to our service center for testing and recalibration.   Click HERE for shipping instructions.

•     If your F-90 or F-90H accumulated too many counts during the test, send the inside unit to our service center for testing and service.  Click HERE for shipping instructions.

•     If your F-90H did not produce any counts, run TEST 3 then try Test 1 again.  Your meter was probably in the process of adding a hot water count when the unit was unplugged to disconnect the cable.  You will not need to run Test 3 for more than one hour.  The results of Test 3 are not important.  It is very possible the unit will not even add one count.  If it still doesn't add any counts after that, send the inside unit to our service center for testing and repair.  Click HERE for shipping instructions.