Rheem H95 Direct Vent Indoor Series Use and Care Manual - Page 50

Relief Valve

Get Rheem H95 Direct Vent Indoor Series PDF manuals and user guides View all Rheem H95 Direct Vent Indoor Series manuals
Add to My Manuals
Save this manual to your list of manuals

Page 50 highlights

Plumbing INSTALLATION INSTRUCTIONS WaterSupply(cont.) Relief Valve Anewpressure-reliefvalve,complyingwiththe StandardforReliefValvesandAutomaticGasShut-Off DevicesforHotWaterSupplySystems,ANSIZ21.22/ CSA4.4,mustbeinstalledattheHOTwateroutlet connectionofthewaterheaterduringinstallation. Localcodesshallgoverntheinstallationofany reliefvalvesorplaceofpurchaseforavailabilityand installationinformation. NOTICES: •Thefollowingdrawingillustratesapressure-only reliefvalve.Iflocalcodesrequireacombination temperatureandpressure-reliefvalve,youmayneed toinstallanextensionpiecetoensurethatthevalve probeisnotdirectlyintheflowpathofthewater. •Apressurereliefvalvesuppliedwiththiswaterheater mustbeinstalledasshownbelow. •Manualoperationofreliefvalvesshouldbe performedatleastonceayear. •Ifthereliefvalveonthesystemdischarges periodically,aproblemexists.Turnoffthewater heater,unplugtheunit,andcallforservice. Forsafeoperationofthewaterheater,besurethat: •Thepressureratingofthereliefvalvemustnot exceed150psi(1,034kPa)orthemaximumworking pressureofthewaterheater.(Seetheratingplateon thewaterheater.) •TheBTUHratingofthereliefvalvemustequalor exceedtheBTUHinputofthewaterheater.(Seethe ratingplateonthewaterheater.) •Novalveofanytypeshouldbeinstalledbetweenthe reliefvalveandthewaterheater. •Dischargefromthereliefvalveshouldbepipedto asuitabledrain.Pipingusedshouldbeofatype approvedforthedistributionofhotwater. •HOTandCOLDwaterlinesshouldbeinsulatedupto thewaterheater.Seepage51. •ThedischargelinemustbeNOSMALLERthanthe outletofthereliefvalve.Thedrainlinemustpitch downwardtoallowforcompletedrainageoftheline andthevalve. •Theendofthedischargelineshouldnotbethreaded orconcealedandshouldbeprotectedfromfreezing. Novalveofanytype,restriction,orreducercoupling shouldbeinstalledinthedischargeline. Union Relief Valve Hot Water Supply Outlet Cold Water Supply Shut-Off Valve Cold Water Supply Inlet Relief Valve Discharge Line Oneendofthereliefvalvedischargelineconnectsto theHOTwateroutletpipeasshownabove.Theother endofthepipeshouldberoutedtoasuitabledrainto eliminatepotentialwaterdamage. 50

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
50
Plumbing
INSTALLATION INSTRUCTIONS
Water±Supply±(cont.)
Relief Valve
A±new±pressure-relief±valve,±complying±with±the±
Standard±for±Relief±Valves±and±Automatic±Gas±Shut-Off±
Devices±for±Hot±Water±Supply±Systems,±ANSI±Z21.22/
CSA±4.4,±must±be±installed±at±the±HOT±water±outlet±
connection±of±the±water±heater±during±installation.±
Local±codes±shall±govern±the±installation±of±any±
relief±valves±or±place±of±purchase±for±availability±and±
installation±information.±
NOTICES:
±
•±±
The±following±drawing±illustrates±a±pressure-only±
relief±valve.±If±local±codes±require±a±combination±
temperature±and±pressure-relief±valve,±you±may±need±
to±install±an±extension±piece±to±ensure±that±the±valve±
probe±is±not±directly±in±the±flow±path±of±the±water.±
•±±
A±pressure±relief±valve±supplied±with±this±water±heater±
must±be±installed±as±shown±below.±
•±±
Manual±operation±of±relief±valves±should±be±
performed±at±least±once±a±year.
•±±
If±the±relief±valve±on±the±system±discharges±
periodically,±a±problem±exists.±Turn±off±the±water±
heater,±unplug±the±unit,±and±call±for±service.
One±end±of±the±relief±valve±discharge±line±connects±to±
the±HOT±water±outlet±pipe±as±shown±above.±The±other±
end±of±the±pipe±should±be±routed±to±a±suitable±drain±to±
eliminate±potential±water±damage.
For±safe±operation±of±the±water±heater,±be±sure±that:
•±±
The±pressure±rating±of±the±relief±valve±must±not±
exceed±150±psi±(1,034±kPa)±or±the±maximum±working±
pressure±of±the±water±heater.±(See±the±rating±plate±on±
the±water±heater.)
•±±
The±BTUH±rating±of±the±relief±valve±must±equal±or±
exceed±the±BTUH±input±of±the±water±heater.±(See±the±
rating±plate±on±the±water±heater.)
•±±
No±valve±of±any±type±should±be±installed±between±the±
relief±valve±and±the±water±heater.
•±±
Discharge±from±the±relief±valve±should±be±piped±to±
a±suitable±drain.±Piping±used±should±be±of±a±type±
approved±for±the±distribution±of±hot±water.
•±±
HOT±and±COLD±water±lines±should±be±insulated±up±to±
the±water±heater.±See±page±51.
•±±
The±discharge±line±must±be±NO±SMALLER±than±the±
outlet±of±the±relief±valve.±The±drain±line±must±pitch±
downward±to±allow±for±complete±drainage±of±the±line±
and±the±valve.
•±±
The±end±of±the±discharge±line±should±not±be±threaded±
or±concealed±and±should±be±protected±from±freezing.±
No±valve±of±any±type,±restriction,±or±reducer±coupling±
should±be±installed±in±the±discharge±line.
Relief
Valve
Union
Union
Cold Water Supply
Shut-Off Valve
Cold Water
Supply Inlet
Hot Water
Supply Outlet
Relief Valve
Discharge Line