Lochinvar 402 - 2072 Check relief valve Inspect/replace hot surface igniter, Check all wiring

9 Maintenance (continued)

Check relief valve

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 Section 4 - Water Connections of the Copper-fin II Installation and Operation Manual before proceeding further.

Installation & Operation Manual

Inspect/replace hot surface igniter

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

￿ WARNING	Do not attempt to repair a faulty hot surface
	igniter or control module. Any modification

￿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.

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

Ignition system checkout

1.	Turn off gas supply to unit.
2.	Turn electric power on.
3.	Adjust the set point on the temperature control to a
	setting above water temperature or to the highest safe
	setting.
4.	The igniter will cycle on trial for ignition.
5.	The control module will lock out and turn the alarm
	light on.

￿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.	Adjust the Set Point Differential and High-Fire Offset to
	the desired settings.
7.	Turn on gas supply.
8.	Press the RESET button at the electronic display panel to
	reset the control module.
9.	If ignition system fails to operate properly, repair work
	must be performed by a qualified service person or
	installer.

Check all wiring

1.Inspect all wiring, making sure wires are in good condition and securely attached.

Check control settings

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.

1.Set the SMART SYSTEM control module display to Parameter Mode and check all settings. See Section 1 of this manual. Adjust settings if necessary. See Section 1 of this manual for adjustment procedures.

2.Check settings of external limit controls (if any) and adjust if necessary.

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