Rinnai RV53E, RV53I Freeze Protection Methods, Manual draining of the water heater

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Freeze Protection Methods

Manual draining of the water heater

If 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 manually drain the water:

1.

Shut off cold water supply and gas supply.

Hot water

2.

Turn off the temperature controller.

outlet

 

3.Disconnect the power to the water heater.

4.Open hot water drain plug at the hot water outlet.

5.Remove water filter to drain the cold water.

If an isolation kit is installed, remove the drain caps on both isolation valves and open both valves above the caps (blue and red valve handles).

To resume normal operation:

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

2.Screw in the hot water drain plug.

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

If the isolation kit was used to drain the unit, replace the drain caps and close both isolation valves (blue and red valve handles).

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.

Hot water

Water

drain plug *

filter

Cold water inlet

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

Running a low volume of water through the water heater to prevent freezing

If 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 MSA or EZConnect should be drained to prevent freezing if not in use.)

1.Turn the water heater off.

2.Close the gas supply valve.

3.Reduce the flow to about 0.1 gal/min or to where the stream is about 0.2 inches thick.

ON! COLD

HOT

0.1gal/min or about 0.2 inch thick

When the water heater or external piping has frozen

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

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

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

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

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RV53i & RV53e Operation and Installation Manual

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Contents Result causing property damage, personal injury or death ANS Z21.10.3 CSATable of Contents Specifications ModelConsumer Safety Information Safety DefinitionsSafety Behaviors and Practices Safety Features Description of OperationHow to Set the Temperature Operating InstructionsTemperature Controller Settings Temperature Options Without a Temperature ControllerModel Temperature Settings Available ºF MCC-91 Temperature ControllerOverview Using the Water Smart / Bath Fill FunctionSetting the Water Volume Setting Controller to Mute Setting the ClockFilling the Tub Models MC-91 and MCC-91Maintenance Error Codes Code Fault RemedyCode Water Quality Trouble Shooting for Common IssuesAccessing Operating Information Flushing the Heat Exchanger Error Code LC or Circulating PumpInstallation Instructions General InstructionsRV53iRV53e Clearances from ApplianceAttachment of the Water Heater Electrical Connection Gas PipingRV53i RV53ePipe Sizing Procedure Example Isolation Valves Installation Instructions Pressure Relief Valve Installation InstructionsPressure Relief Valve Maintenance Water PipingPressure Relief Valve Freeze ProtectionManual draining of the water heater When the water heater or external piping has frozenFreeze Protection Methods Freeze Protection Piping KEYRinnai Water Heater Error Indication or Air Handler Control Switch RV53iRecommended Piping for Basic Installation Recommended Piping for Circulation Systems For this applicationInstallation requirements Venting Instructions RV53iIntake / Exhaust Guidelines CondensateManufacturer Product Parts Maximum Vent LengthVent Products Flue Installation Concentric Venting RV53i Description Canadian Installations US Installations Flue Terminal Clearances ANS Z21.10.3, CSAAdditional Clearances RV53iConnecting Multiple Water Heaters High Altitude InstallationsNumber Connected Accessories Necessary Water Heaters GuidelinesCanada only Temperature Controller Installation ConfigurationsLocation Cable Lengths and SizeTemperature Controller Mounting the Controller RV53iMounting the Controller RV53e For Your Safety Read Before Operating Operating InstructionsOutlet Flow Data Technical DataPressure Drop Curve Temperature Setting ReplacementSpace Heating PumpsDimensions RV53eLadder Diagrams Warranty Information Limited WarrantyWhat is covered? Consumer SupportLimitation on warranties How do I get service? What is not covered?What will Rinnai do? State Regulations Important In the State of Massachusetts 248 CMR 4.00Support à la clientele Instructions d’installationInstructions dutilisation Instructions dutilisation Temp. d’eauPlages de température avec un contrôleur de température Options de température sans contrôleur de températureModel Arrangements de température disponibles ºF Les températures suggérées sont deEntretien Instructions dinstallation Instructions généralesÉcartements par rapport à lappareil Fixation du chauffe-eauInstructions générales Installation à altitude élevéeTuyauterie de gaz Valve à Bille / Valve de dégagement de pression Valve de dégagement de pression Instructions d’InstallationTuyauterie deau Niveau maximum Qualité de leauSoupape de sûreté Tuyauterie recommandée pour installation de base LégendeCondensat Instructions de ventilation RV53iConsignes pour aspiration/évacuation Constructeur Produit Pièces Longueur maximum de ventilationProduits de ventilation Espacements pour terminaison de cheminée ANS Z21.10.3, CSA Installation de conduit de cheminée RV53i Instructions dutilisation VanneMa ualmanuelleValveDiagramme en escalier FUS TherSupport à la clientèle Linformation de garantieGarantie limitée Quest-ce qui est couvert ?Que fait Rinnai pour exercer la garantie ? Limitation sur les garantiesU287-1821X0100