OEM Maintenance Docs 3.pdf

Required Maintenance The appliance and vent system must be inspected annually by a licensed professional. Repairs and maintenance should be performed bya licensed professional. The licensed professional mustveritr/ proper operation after se rvicing.

To protect Vourself from harm, before performing maintenance:

. Turn off the electrical power supply by unplugging the power cord or by turning off the electricity at the circuit breaker. (The temperature controller does not control the electrical power.)

. Turn offthe gas at the manual gas valve, usually located immediately below the water heater.

. Turn offthe incominB water supply. This can be done at the isolation valve immediately below the water heater or by turning offthe water supply to the building.

Keep the appliance area clear and free from combustible materials, gasoline, and other flammable vapors and liquids.

The following maintenance items are required for the proper operation of your water heater.

The appliance must be inspected annually by a licensed professional. Repairs and maintenance should be performed by a licensed professional. The licensed professional must verify proper operation after servicing.

Cleaning

It is imperative that control compartments, burners, and circulatinB air passageways ofthe appliance be kept clean.

Clean as follows:

1. Turn off and disconnect electrical power. Allow to cool.

2. Close the water shut off valves. Removeandclean the water inlet filter.

3. Remove the front panel by removing 4 screws.

4. Use pressurized air to remove dust from the main burner, heat exchanger, and fan blades. Do not use a wet cloth or spray cleaners on the burner.

Do not use volatile substances such as benzene and thinners. They may ignite or fade the paint.

5. Use soft dry cloth to wipe cabinet.

Vent System

The vent system and condensate collector (located at top of unit) should be inspected at least annually for blockages or damage. lf the vent a nd/or con de nsate collector is blocked contact a licensed professional.

Motors Motors are permanently lubricated and do not need periodic lubrication. However you must keep fan and motor free of dust and dirt by cleaning annually.

Temperature Controller Use a soft damp cloth to clean the temperature controller. Do not use solvents.

Lime / Scale Build-up lf you receive diagnostic code "LCfi" (LCL, LC2,...\, refer to the procedure, Flushing the Hedt Exchonger Refer to the section on Water Qudlity to see if your water needs to be treated or conditioned. (When checking maintenance code history, "00" is substituted for "LC#".)

Snow Accumulation Keep the area around flue terminal free of snow and ice. The appliance wili not function properlyif the intake air or exhaust is impeded (blocked or partially blocked) by obstruc6ons.

Coastal lnstallations lnstallations located in or near coastal areas may require additional maintenance due to corrosive airborne ocean salt.

Clean the water filter Clean the inlet water filter by closing the cold and hot water inlet isolation (shut-off) valves. Put a bucket under the filter at the bottom of the water heater to catch any water that is contained inside the unit.

Unscrew the water filter. Rinse the filter to remove any debris. lnstallthe filter and open the isolation va lves.

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WARNING

nwARNINq

Testing the pressure relief valve should only be performed by a licensed professional. Scalding hot water may be released under pressure.

Pressure Relief Valve:

Operate the valve manually once a year. ln doin8 so, it will be necessary to take precautions with regard to the discharge of potentially scalding hot water under pressure. Ensure discharge water has a safe place to flow. Contact with your body or other property may cause damage or harm.

Visual lnspection of Flame

Verify proper operation after servicing.

The burner must flame evenly over the enhre surface when operating correctly. The flame must burn with a clear, blue, stable flame- See the parts breakdown of the burnerforthe location oftheview ports.

The flame pattern should be as shown in the figures below.

SATISFACTORY

FRONT VIEW

UI{SATISFACTORY

FRONT VIEW

ruM€ 800

Freeze Protection

Make su re in case of freezing weather that the water heater and its water lines are adequately protected to prevent freezing. Damage due to freezin8 is not covered by the warranty. Refertothe section on Freeze Protection. The unit may be drained manually.

However, it is highly recommended that:

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. drain down solenoid valves be purchased and installed that will automatically drain the unit if power is lost. These are available in a kit, 104000059. (The condensate trap is not affected by the auto drain down solenoid valves and will have to be manually drained.)

. a surge protector with terminals be purchased and installed which allows the solenoid valves to operate if the unit is disabled due to a diagnostic code. This is available as 104000057.

Winterizing

These recommendations are intended to suggest practices that are effective for winterizing the water heater. They should be used as a guide only. No liability is assumed for any issues resulting from the use of this information.

GAS

Shut off the gas to the water heater- ltisgenerally preferable to shut off the gas service to the entire location if gas is not going to be used-

WATER

Shut off the cold water supply to the water heater. lt is generally preferable to shut off the water to the entire location if water is not going to be used.

Drain the water heater by opening the drain valves on the cold water line and hot water line.

Open several hot water taps and remove the filter assembly at the water inlet in order to allow room for expansion in case there is water in the lines that freeze. Compressed air may be used to purge any water left in the system.

ELECTRIC

Disconnect the power supply by either unplugginB the electrical cord or by turning off the circuit breaker to the water heater to prevent potential damage from irregular power surBes or interruptions.

VENT TERMINATION

Place a cover over the vent termination (intake and exhaust) if it can be safely accessed. The cover should be easy to apply and remove. This will prevent debris, leaves, and small animals from entering the venting and water heater which could cause air flow issues upon return to service.

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Flushing the heat exchanger

An LC0-LC9 or "00" diagnostic code indicates the unit is beginning to lime up and must be flushed. Failure to flush the appliance will cause damage to the heat exchanger. Damage caused by lime build-up is not covered by the unit'swarranty. Rinnai strongly recommends installation of isolation valves to allowforflushing of the heat exchanger.

1. Disconnect electrical power to the water heater.

2. Close the shutoff valves on both the hot water and cold water lines (V3 and V4).

3. Connect pump outlet hose (H1) to the cold water line at service valve (V2).

4. Connect drain hose (H3) to service valve (V1).

5. Pour 4 gallons of undiluted virgin, food grade, white vinegar into pail.

5. Place the drain hose (H3) and the hose (H2) to the pump inlet into the cleaning solution.

7. Open both service valves (V1 and V2) on the hot water and cold water lines.

8. Operate the pump and allow the vinegar to circulate through the water heater for at least t hour at a rate of 4 gallons per minute (15.1 liters per minute).

9. Turn off the pump.

10. Rinse the vinegarfrom the water heater as follows:

a. Remove the free end ofthe drain hose (H3) from the pail. Place in sink or outside to drain-

b. Close service valve, (V2), and open shutoff valve, (V4). Do not open shutoff valve, (V3).

c. Allow water to flow through the water heater for 5 m inutes.

d. Close shutoff valve (V4). When unit has finished draining remove the in-line filter at the cold water inlet and clean out any residue. Place filter back into unit and open valve (V4).

e. Close service valve, (V1), and open shutoff valve, H3

3/4" Ball Valve

3/4" U nion

Check Valve

Pressure Relief Valve

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Pressure Regulator

Circulating Pum p

Boiler D rain Valve

Solenoid Valve

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V1 v2

V3 t L ine

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Lin e v4

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Following flush procedu re call tech nical assistance (1-800-621-

9419) for PCB reset information.

H2

C ircu lating Pump o o

VC Series Manual

H1

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(v3).

11. Disconnect all hoses.

12. Restore electrical power to the water heater.

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Manual Draining of the Water Heater

To avoid burns, wait untilthe equipment cools down before draining the water. The water in the appliance will remain hot after it is turned off.

lf the water heater is not going to be used during a period of possible freezing weather, it is recommended that the water inside the water heater be drained.

To manuallv drain the water:

1. Shut off cold water supply and gas supply.

2. Turn off the temperature controller.

3. Disconnect the power to the water heater.

4. Place a container to catch the water. Remove the drain caps on both isolation valves and open both valves above the caps (blue and red valve handles). -OR- Open hot water drain plug at the hot water outlet.

5. Remove water fi lter to drain the cold water. Compressed air may be used to purge any water left in the system.

To resume normal ooeration:

1. Confirm that allwater drain plugs are removed, that the gas supply is turned off, and that all taps are closed.

2. Screw in the water filter in the cold water inlet.

3. Replace the drain caps and close both isolation valves. -OR- Screw in the hot water drain plug.

4. Open the cold water supply.

5. Open a tap and confirm that water flows, and then close.

6. Turn on the power.

7. After confirming that the temperature controller is off, turn on the gas supply.

8. Turn on the temperature controller.

Water filterHot water outlet Hot water drain plug *

Cold water inlet

* Use a wrench or other tool to unscrew the hot water drain plug.

0.L gal/min or about

0.2 inch thick

Running a low volume of water through the water heater to prevent freezing lf the temperature exceeds the ability of the water heater to freeze protect itself, or if power is lost, the following steps may prevent the water heater and external piping from freezing. {Units connected with EZ Connect (2 unit link) should be drained to prevent freezing if not in use.)

1. Turn the water heater off.

2. Close the gas supply valve.

3. Turn on a hot water tap to flow water about 0.1gal/min or where the stream is about 0.2 inches thick.

When the water heater or external piping has lrozen

1. Do not operate the water heater if it or the external piping is frozen.

2. Close the Bas and water valves and turn off the power.

3. Wait until thewaterthaws. Check by opening the water supply valve.

4. Check the water heater and the piping for leaks.

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