GAS-FIRED BOILER

User Manual

SECTION III – MAINTENANCE PROCEDURES (CONT’D)

be removed immediately or the combustion air intake must be relocated to another area.

Check Combustion Air Inlets

Verify that the unit’s vent termination and combustion air intake are clean and free of obstructions. Remove any debris on the air intake or flue exhaust openings. If removing the debris does not allow the unit to operate correctly, contact your qualified service technician to inspect the unit and the vent / combustion air system.

Check Pressure Relief Valve

1.Visually inspect the primary pressure relief valve and the relief valve discharge pipe for signs of weeping or leakage.

2.If the pressure relief valve often weeps, the expansion tank may not be operating properly. Immediately contact a qualified service technician to inspect the unit and system.

Check Vent Condensate Drain System

Check Temperature display and Pressure Gauge

1.Ensure the pressure reading on the pressure gauge does not exceed 25 psig. Higher pressure readings may indicate a problem with the expansion tank.

2.Ensure the temperature on the LED display panel does not exceed 180ºF. Higher temperature readings may indicate a problem with the operating thermostat controls.

3.Contact a qualified service technician if problem persists.

MONTHLY MAINTENANCE

Check Vent Piping

1.Visually inspect the flue gas vent piping for any signs of blockage, leakage or deterioration of the piping. Notify a qualified service technician immediately if any problems are found.

WARNING

Failure to inspect the venting system as noted and have it repaired by a qualified service technician can result in the vent system failure, causing severe personal injury or death.

1.While the unit is running, check the discharge end of the condensate drain tubing. Ensure no flue gas is leaking from the condensate drain tubing or tee connection by holding your fingers near the opening.

2.If you notice flue gas leaking from the opening, this indicates a dry condensate drain trap. Fill the condensate trap assembly. Contact a qualified service technician to inspect the unit and condensate line and refill the condensate trap if problem persists regularly.

3.The Service Technician must ensure the condensate drain line is not blocked by pouring water through the plug T fitting on the condensate drain assembly. The water should flow out of the end of the drain line. If water does not appear at the end of the drain line, the qualified service technician must clean the condensate line.

4.To fill the condensate drain assembly. Slowly pour water into the T fitting on the assembly until water appears at the end of the drain line.

WARNING

You must make sure the condensate hose is securely fastened before restarting boiler. Do a final check to assure proper flow.

Check Intake Air Vent Piping

1.Visually inspect the intake air vent piping for any signs of blockage. Inspect the entire length of the intake air vent piping to ensure piping is intact and all joints are properly sealed.

2.Notify a qualified service technician if any problems are found.

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Munchkin pmn Check Combustion Air Inlets, Check Pressure Relief Valve, Check Vent Piping, Check Intake Air Vent Piping
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pmn specifications

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