Lochinvar 402 - 2072 service manual Check relief valve, Inspect/replace hot surface igniters

Copper-fin II/IIE Boiler and Water Heater Service Manual
2 Maintenance (continued)
Check relief valve	Inspect/replace hot surface igniter

1.Inspect the relief valve and lift the lever to verify flow. Before operating any relief valve, ensure that it is piped with its discharge in a safe area to avoid severe scald potential. Read the Water Connections Section of the Installation and Operation Manual before proceeding further.

This unit uses a proven hot surface ignition module and a hot surface igniter. The hot surface ignition module is not repairable. Any modification or repairs will invalidate the warranty.

￿ WARNING Do not attempt to repair a faulty hot

￿WARNING

Safety relief valves should be re-inspected

AT LEAST ONCE EVERY THREE YEARS, by a licensed plumbing contractor or authorized inspection agency, to ensure that the product has not been affected by corrosive water conditions and to ensure that the valve and discharge line have not been altered or tampered with illegally. Certain naturally occurring conditions may corrode the valve or its components over time, rendering the valve inoperative. Such conditions are not detectable unless the valve and its components are physically removed and inspected. This inspection must only be conducted by a plumbing contractor or authorized inspection agency

–not by the owner. Failure to re-inspect the boiler relief valve as directed could result in unsafe pressure buildup, which can result in severe personal injury, death, or substantial property damage.

surface igniter or ignition module. Any

modification or repairs may create hazardous conditions that result in property damage, personal injury, fire, explosion and/or toxic gases.

A faulty hot surface igniter or ignition module must be replaced with an identical part. A specification igniter and ignition module for this specific unit is available from your local distributor. Do not use general purpose field replacement ignition modules or igniters.

Inspect/replace hot surface igniters

1.	Turn off main electrical power to the appliance.
2.	Turn off main manual gas shutoff to the appliance.
3.	Remove lower front door to gain access to the hot surface
	igniter.
4.	Locate the hot surface igniter. Disconnect the two power
	leads to the hot surface igniter.
5.	Loosen and remove the two screws used to attach the
	igniter.

￿WARNING

Following installation, the valve lever must be operated AT LEAST ONCE A YEAR to ensure that waterways are clear. Certain naturally occurring mineral deposits may adhere to the valve, rendering it inoperative. When manually operating the lever, water will discharge and precautions must be taken to avoid contact with hot water and to avoid water damage. Before operating lever, check to see that a discharge line is connected to this valve directing the flow of hot water from the valve to a proper place of disposal. Otherwise severe personal injury may result. If no water flows, valve is inoperative. Shut down the appliance until a new relief valve has been installed.

6.	Remove the igniter from the combustion chamber door.
	Use care, do not hit or break the silicon carbide igniter. Do
	not contaminate the igniter by handling with oily or dirty
	hands.
7.	Check the replacement igniter for cracks or damage before
	installing.
8.	Ensure that the fiber gasket used to seal the base of the
	igniter to the combustion chamber door is reinstalled to seal
	the base of the replacement igniter.
9.	Carefully insert the igniter into the opening of the
	combustion chamber door and re-attach the two screws
	removed in Step 5. Over-tightening may break the ceramic
	mounting flange.
10.	Ensure that the igniter gasket is properly installed and seals
	the point of contact between the igniter and the combustion

2.After following the above warning directions, if the relief valve weeps or will not seat properly, replace the relief valve. Ensure that the reason for relief valve weeping is the valve and not over-pressurization of the system due to expansion tank waterlogging or undersizing.

	chamber door.
11.	Reconnect the power leads to the igniter.
12.	Replace the lower front door.
13.	Turn on main gas supply and main power.
14.	Test fire the appliance to ensure proper operation.

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