Lochinvar 502 Inspect condensate system, Test low water cutoff if installed, Operate relief valve

User’s Information Manual

1Maintenance schedule (continued)

Inspect condensate system

1.Inspect the condensate drain line, condensate PVC fittings, and condensate trap on an annual basis.

Flush condensate trap with water

1.Remove the four (4) screws securing the top cover to the condensate trap and remove the cover (reference FIG. 1-1).

2.Locate the plastic ball inside the float tube. Verify there is nothing under the ball causing it to not seat properly.

3.If necessary, flush with fresh water until the water begins to pour out of the drain.

4.Replace the top cover on the condensate trap.

5.Replace the four (4) screws removed in Step 1.

Figure 1-1_Condensate Trap

Test low water cutoff (if installed)

1.If the system is equipped with a low water cutoff, test the low water cutoff periodically during the heating season, following the low water cutoff manufacturer’s instructions.

Reset button (low water cutoff)

1.Testing the low water cutoff shuts the unit off. Press the RESET button on the low water cutoff bracket to turn the unit back on.

Check appliance piping (gas and water)

1.Remove the appliance front access door and perform a gas leak inspection per steps 1 through 7 of the Operating Instructions on page 8. If gas odor or leak is detected, immediately shut down the appliance following the procedures on page 8. Call a qualified service technician.

2.Visually inspect for leaks around water piping.

Also inspect the circulators, relief valve, and fittings. Immediately call a qualified service technician to repair any leaks.

￿WARNING Have leaks fixed at once by a qualified service technician. Failure to comply could result in

severe personal injury, death, or substantial property damage.

3.Replace the front access door.

Operate relief valve

1.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.

￿WARNING To avoid water damage or scalding due to valve operation, a metal discharge line must

be connected to the relief valve outlet and run to a safe place of disposal. This discharge line must be installed by a qualified heating installer or service technician in accordance with the instructions in the Power-fin Installation and Operation Manual. The discharge line must be terminated so as to eliminate possibility of severe burns or property damage should the valve discharge.

2.Read the boiler pressure/temperature gauge to make sure the system is pressurized. Lift the relief valve top lever slightly, allowing water to relieve through the valve and discharge piping.

3.If water flows freely, release the lever and allow the valve to seat. Watch the end of the relief valve discharge pipe to ensure that the valve does not weep after the line has had time to drain. If the valve weeps, lift the seat again to attempt to clean the valve seat. If the valve continues to weep afterwards, contact your qualified service technician to inspect the valve and system.

4.If water does not flow from the valve when you lift the

lever completely, the valve or discharge line may be blocked. Immediately shut down the appliance, following the operating instructions on page 8 of this manual. Call your qualified service technician to inspect the appliance and system.

Shut appliance down (unless boiler is used for Domestic Water)

1.Follow “To Turn Off Gas to Appliance” on page 8 of this manual.

2.Do not drain the system unless exposure to freezing temperatures will occur.

3.Do not drain the system if it is filled with an antifreeze solution.

4.DO NOT shut down appliances used for domestic water heating, they must operate year-round.

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