Use and Care Manual

66
Check Exhaust Vent and Intake Piping
Visually inspect the exhaust vent for any signs of blockage, leakage, or deterioration of the piping. Inspect the exhaust vent bracing.Ensure bracing
is undamaged and in good condition. Notify a qualied service technician immediately if any problems are found.
Check Pressure Relief Valve
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Visually inspect the primary pressure relief valve and discharge pipe for signs
of weeping or leakage.
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If the pressure relief valve often weeps, the expansion tank may not be
operating properly. Immediately contact a qualied service technician to inspect
the appliance and system.
Check Vent Condensate Drain System
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While the appliance is running, check the discharge end of the condensate
drain tubing. Ensure no ue gas is leaking from the condensate drain tubing by
holding your ngers near the opening.
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If you notice ue gas leaking from the opening, this indicates a dry condensate
drain trap. If problem persists, contact a qualied service technician to inspect
the appliance and condensate line and rell the condensate trap.
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If applicable, check the condensate neutralizer and ensure it is full of
condensate neutralizing marble chips.
Check the Air Vent
Loosen cap one counterclockwise turn to allow air vent to operate. See Figure 43. If the air vent valve works freely without leaking, close the valve by
turning clockwise. If vent does not operate correctly, contact a qualied service technician to replace the vent.
Check Primary and Gas Piping
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Remove the appliance cover and perform a gas leak inspection following Operating Instructions, page 2, this manual. If gas odor or leak is
detected, follow procedures on page 2. Call a qualied service technician.
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Visually inspect for leaks around the internal appliance water connections and around the heat exchanger. Visually inspect the external system
piping, circulators, and system components and ttings. Immediately call a qualied service technician to repair any leaks.
Operate Pressure Relief Valve
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Before proceeding, verify that the relief valve outlet has been piped to a safe place of discharge, avoiding any possibility of scalding from hot water.
Visually inspect the intake piping for any signs of blockage. Inspect the entire
length of the intake pipe to ensure piping is intact and all joints are properly
sealed.Inspect the intake pipe bracing.Ensure bracing is undamaged and in good
condition. Notify a qualied service technician if any problems are found.
WARNING
WARNING
Failure to inspect the venting system and have it repaired by a qualied service technician can result in vent system failure, causing severe personal injury or
death.
Have leaks xed at once by a qualied service technician. Failure to comply could result in substantial property damage, severe personal injury, or death.
Figure 43 – Air Vent Detail
Figure 42 – Cleaning the Air Intake Filter
Cleaning the Air Intake Filter
The air intake lter should be cleaned once a month. If not, the combi boiler
could encounter combustion problems.
To clean the air intake lter:
1. Press the Power button on the control panel to turn off the combi boiler.
2. Disconnect the power supply from the combi boiler.
3. If water heater has been operating, wait for it to cool before continuing.
4. Remove the front cover of the combi boiler cabinet.
5. Pull the lter out of the air intake adapter.
6. Remove the lter from the plastic assembly and clean it with a toothbrush
and clean running water. See Figure 42