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TANKLESS WATER HEATER
Check Pressure Relief Valve
•
Visually inspect the primary pressure relief valve and discharge pipe for signs of weeping or leakage.
•
If the pressure relief valve often weeps, the expansion tank may not be operating properly. Immediately
contact a qualified service technician to inspect the water heater and system.
Check the Condensate Drain System
•
While the water heater is running, check the discharge end of the condensate drain tubing. Ensure no flue
gas is leaking from the condensate drain tubing by holding your fingers near the opening.
•
If you notice flue gas leaking from the opening, this indicates a dry condensate drain trap. If problem per-
sists, contact a qualified service technician to inspect the water heater and condensate line and refill the
condensate trap.
•
If applicable, check the condensate neutralizer and ensure it is full of condensate neutralizing marble chips.
Cleaning the Air Intake Filter
The air intake filter should be cleaned once a month. If not, the water heater could encounter combustion
problems.
To clean the air intake filter:
1. Press the Power button on the control panel to turn off the water heater.
2. Disconnect the power supply from the water heater.
3. If water heater has been operating, wait for it to cool before continuing.
4. Remove the front cover of the water heater cabinet.
5. Pull the filter out of the air intake adapter.
6. Remove the filter from the plastic assembly and clean it with a toothbrush and clean running water. See
Figure 47.
Figure 42 – Cleaning the Air Intake Filter
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