30 11112014GW
Code 63 Troubleshooting Procedure
Circulation Flow Rate dropped below 1.3 GPM
WARNING: Turn off the water supply to the water heater before removing the inlet water filter.
1. Using the temperature controller see if unit is producing flow. To display the recovery flow rate
in gallons per minute through the unit, press the “UP” button for 3 seconds, followed by the
“ON/OFF” button. The display will display a number, that number is your flow rate. Example 5 =
0.5 gpm, 21 – 2.1 gpm. If the flow rate is below 1.3 gpm perform the following checks;
a. Bleed all air from the system tank and pump.
b. Clean the inlet water filter.
c. Verify you have the proper water supply to the appliance at a flow rate of six gallons
plus.
d. Verify you have 30 to 50 psi of inlet water pressure to the appliance.
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