Lochinvar Water Heater CGN200080

Check manifold and inlet gas pressures

Verify damper operation sequence

Is there a problem with the water heater operation in AUTOMATIC OPERATION position?

Reset Service Switch to HOLD OPEN DAMPER position if there is a problem

Does the water heater operate in HOLD OPEN DAMPER position?

Refer to EFFIKAL RVGP-FSF-SERIES TROUBLESHOOTING GUIDE if water heater operates in HOLD OPEN DAMPER position

Refer to Troubleshooting Sections and Operational Checklist if water heater does not operate in either position

Attach a pressure gauge or a manometer to the gauge port

Enter the manifold pressure from Table 5

Calculate the actual heater input using the formula (3600 / T) X H = Btuh

Is the calculated Btuh within the acceptable range?

Remove the regulator adjustment sealing cap

Adjust the pressure by turning the adjusting screw

Repeat steps 3 and 4 until the specified input rate is achieved

Turn the gas control knob to PILOT

Measure the depth of lime buildup in the heater

Is the lime buildup 1/2 inch or less?

Is the lime buildup 2 inches or more?

Deliming Schedule Recommendation

Recommended deliming schedule based on lime buildup

Read and follow handling instructions on the deliming product label

Measure the depth of lime buildup in the heater

Record the depth of lime buildup in inches

Deliming Schedule Recommendation

Determine deliming frequency based on lime buildup

Specify other deliming frequency if applicable

Read and follow handling instructions on the deliming product label