ONHW30NG60 User Manual

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Page16

Version1.0Aug2018

After the water heater is installed,the appliance and its gas connection, including factory connections, MUST be

leak‐testedatnormaloperatingpressure.

Warning!

NEVERuseanopenflametotestforgasleak! 

 Turnonthegasservicevalve.

 Usesoapywatertotestforleakageatallgasconnectionsandfittings.Ifbubblesareseen,itindicatesthere

isaleakandMUSTberectified–seeFigure17.



HighAltitudeInstallation

Thewaterheaterissuitableforinstallationupto2000ft(600m) above sea level. The input rating of this water

heaterisbasedonsealeveloperation.Athigherelevations,theactualinputratemaybelowerthanthevaluelisted

inproductdatalabel.

For installation above 2000ft (600m) elevation, contact a qualifiedservicetechniciantomakeproperaltitude

adjustments.



Warning!

Do NOT install the water heater at elevations above 2000ft (600m).PleasecontactONSENcustomerservicefor

futureadvice.



HotandColdSupplyLineInsulation

Suitablepipeinsulationand/orelectricheat‐tracingshouldbeusedtopreventwaterinthepipesfromfreezing.

Ifwaterinthepipingisfrozen,thewaterheaterwillmalfunction.

BothHotandColdwaterlinesshouldbeinsulatedforprotectioninareaspronetofreezingconditions–seeFigure

18.



Figure17

Figure 18

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User Manual - Page 17