Brochure
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Product Brochure Residential Water Heaters | Condensing Tankless Series C NDENSING TANKLESS The Next Level of Tankless: Prestige™ high efficiency condensing tankless gas water heaters • 94% energy efficient and exceeds EnERgy STaR® requirements • Indoor direct vent with PVC piping and outdoor models • RTGH-95 series - 11,000-199,900 Btu/h for 3 bathroom homes • RTGH-84 series - 11,000-157,000 Btu/h for 2-3 bathroom homes WIaNtTeErG|RRAeTsEiDdeHnOtiMaEl GCaOsM|FCORoTndensing Tankless Water Heaters
Product Brochure Residential Water Heaters | Condensing Tankless Series C NDENSING TANKLESS The Next Level of Tankless: Prestige™ high efficiency condensing tankless gas water heaters • 94% energy efficient and exceeds EnERgy STaR® requirements • Indoor direct vent with PVC piping and outdoor models • RTGH-95 series - 11,000-199,900 Btu/h for 3 bathroom homes • RTGH-84 series - 11,000-157,000 Btu/h for 2-3 bathroom homes WIaNtTeErG|RRAeTsEiDdeHnOtiMaEl GCaOsM|FCORoTndensing Tankless Water Heaters
Brochure
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... water Rheem uses sophisticated condensing technology to -30°F • EZ- See the 2012 Tankless Parts Catalog for details 94% EFFICIENT • Hot start programming helps minimize fluctuation in electric blower Indoor Direct Vent Commercial Outdoor • Exclusive! Technology • Two-pipe direct vent system designed for PVC pipe, see instructions for complete information ReINsTidEeGnRtiaAlTWEDatHerOHMeEaCteOrsMF| OCRoTndensing Tankless Series at...
... water Rheem uses sophisticated condensing technology to -30°F • EZ- See the 2012 Tankless Parts Catalog for details 94% EFFICIENT • Hot start programming helps minimize fluctuation in electric blower Indoor Direct Vent Commercial Outdoor • Exclusive! Technology • Two-pipe direct vent system designed for PVC pipe, see instructions for complete information ReINsTidEeGnRtiaAlTWEDatHerOHMeEaCteOrsMF| OCRoTndensing Tankless Series at...
Brochure
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Rheem.com 800.720.2076 See the installation instructions for Canada.) Outdoor Venting details, including clearances and diagrams can be vented vertically or horizontally to the outdoors using manufacturer approved venting material. Superior Construction and Reliability Air Intake (PVC Venting) Exhaust (PVC Venting) 1 2 7 8 6 3 5 4 9 10 Indoor Direct Vent... External Connection for Remote Control Cable 3/4" Cold 3/4" Gas Water Connection Inlet Venting Options and Installations PVC Vent System All indoor tankless units must be used for each specific model. (ULCS636 Pipe must be...
Rheem.com 800.720.2076 See the installation instructions for Canada.) Outdoor Venting details, including clearances and diagrams can be vented vertically or horizontally to the outdoors using manufacturer approved venting material. Superior Construction and Reliability Air Intake (PVC Venting) Exhaust (PVC Venting) 1 2 7 8 6 3 5 4 9 10 Indoor Direct Vent... External Connection for Remote Control Cable 3/4" Cold 3/4" Gas Water Connection Inlet Venting Options and Installations PVC Vent System All indoor tankless units must be used for each specific model. (ULCS636 Pipe must be...
Brochure
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...Direct Vent 140° F MIN. TK-901C Rev. 4 ANN. Indoor 85° to supply tankless gas water heaters - GPM 8.4 CONNECTION WATER GAS HEIGHT WIDTH DEPTH 3/4 3/4 27-1/2 18-1/2 9-3/4 VENT DIAM. 2" or 3" PVC 2-Pipe SHIP. % OF D.O.E. Vent... 10 9 8 H95 Max Flow H84 Max Flow 7 6 5 4 3 2 1 0 10 20 35 45 50 60 70 77 80 90 100 120 140 Delta-T Maximum Vent Length (intake/outlet...Rheem Prestige RTGH-84 Specifications for RTGH-95 models, up to 199,900 Direct Vent 140° F MIN. RANGE 11,000- GPM 9.5 CONNECTION WATER GAS HEIGHT WIDTH DEPTH 3/4 3/4 27-1/2 18-1/2 9-3/4 VENT...
...Direct Vent 140° F MIN. TK-901C Rev. 4 ANN. Indoor 85° to supply tankless gas water heaters - GPM 8.4 CONNECTION WATER GAS HEIGHT WIDTH DEPTH 3/4 3/4 27-1/2 18-1/2 9-3/4 VENT DIAM. 2" or 3" PVC 2-Pipe SHIP. % OF D.O.E. Vent... 10 9 8 H95 Max Flow H84 Max Flow 7 6 5 4 3 2 1 0 10 20 35 45 50 60 70 77 80 90 100 120 140 Delta-T Maximum Vent Length (intake/outlet...Rheem Prestige RTGH-84 Specifications for RTGH-95 models, up to 199,900 Direct Vent 140° F MIN. RANGE 11,000- GPM 9.5 CONNECTION WATER GAS HEIGHT WIDTH DEPTH 3/4 3/4 27-1/2 18-1/2 9-3/4 VENT...
Parts and Accessories
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... 9-1/2" Deep Pipe Covers Cosmetic Pipe Covers enhance an indoor or outdoor installation by protecting the tankless unit from damage and tampering. Horizontal or Vertical Concentric Vent Termination • SP20245 for Rheem, Ruud, Rheem-Ruud, Richmond, EcoSense and Paloma tankless water heaters | 1 These boxes come in an ... RTGH-95X, RTGH-84DV, and RTGH-84X For Additional Parts and Accessories, and parts and accessories for other Rheem Tankless products please see the Tankless Parts and Accessories 2010 Catalog TKPP-101-10 Rev.1 for a clean installation of the intake and exhaust pipes ...
... 9-1/2" Deep Pipe Covers Cosmetic Pipe Covers enhance an indoor or outdoor installation by protecting the tankless unit from damage and tampering. Horizontal or Vertical Concentric Vent Termination • SP20245 for Rheem, Ruud, Rheem-Ruud, Richmond, EcoSense and Paloma tankless water heaters | 1 These boxes come in an ... RTGH-95X, RTGH-84DV, and RTGH-84X For Additional Parts and Accessories, and parts and accessories for other Rheem Tankless products please see the Tankless Parts and Accessories 2010 Catalog TKPP-101-10 Rev.1 for a clean installation of the intake and exhaust pipes ...
Parts and Accessories
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Parts for RTGH-84DV, RTGH-95DV series Rheem Part # Program Chip RTG20228T RTG20228U RTG20228N RTG20228P Description Natural Gas Program Chip LP Gas Program Chip Natural Gas Program Chip LP Gas Program Chip Commercial Conversion Kits RTG20225A Natural Gas Commercial Conversion Kit RTG20225B LP Gas Commercial Conversion Kit RTG20224A Natural Gas Commercial Conversion Kit RTG20224B LP Gas Commercial Conversion Kit RTGH-84DV RTGH-95DV ● ● ● ● ● ● ● ● 2 | for Rheem, Ruud, Rheem-Ruud, Richmond, EcoSense and Paloma tankless water heaters
Parts for RTGH-84DV, RTGH-95DV series Rheem Part # Program Chip RTG20228T RTG20228U RTG20228N RTG20228P Description Natural Gas Program Chip LP Gas Program Chip Natural Gas Program Chip LP Gas Program Chip Commercial Conversion Kits RTG20225A Natural Gas Commercial Conversion Kit RTG20225B LP Gas Commercial Conversion Kit RTG20224A Natural Gas Commercial Conversion Kit RTG20224B LP Gas Commercial Conversion Kit RTGH-84DV RTGH-95DV ● ● ● ● ● ● ● ● 2 | for Rheem, Ruud, Rheem-Ruud, Richmond, EcoSense and Paloma tankless water heaters
Parts and Accessories
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Parts for Rheem, Ruud, Rheem-Ruud, Richmond, EcoSense and Paloma tankless water heaters | 3 PVC RTGH-84DV RTGH-95DV Accessories Venting Remote Controls Pipe Covers Service Valves Relief Valve EZ-Link™ Cable SP20286 (RXGY-G01) 3-Inch Horizontal Termination Kit SP20285 (RXGY-G02) 2-Inch Horizontal Termination ... AP12993C Pressure Relief Valve RTG20040 6FT EZ-Link™ Cable See Page 3 of TKPP-101-2010 for Manifold Controller Information for RTGH-84DV, RTGH-95DV series Ref # Rheem Part # Description 1 RTG20223P Control Board RTG20223D Inlet Thermistor -
Parts for Rheem, Ruud, Rheem-Ruud, Richmond, EcoSense and Paloma tankless water heaters | 3 PVC RTGH-84DV RTGH-95DV Accessories Venting Remote Controls Pipe Covers Service Valves Relief Valve EZ-Link™ Cable SP20286 (RXGY-G01) 3-Inch Horizontal Termination Kit SP20285 (RXGY-G02) 2-Inch Horizontal Termination ... AP12993C Pressure Relief Valve RTG20040 6FT EZ-Link™ Cable See Page 3 of TKPP-101-2010 for Manifold Controller Information for RTGH-84DV, RTGH-95DV series Ref # Rheem Part # Description 1 RTG20223P Control Board RTG20223D Inlet Thermistor -
Parts and Accessories
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Parts for RTGH-84X, RTGH-95X series Rheem Part # Program Chip RTG20228V RTG20228W RTG20228R RTG20228S Description Natural Gas Program Chip LP Gas Program Chip Natural Gas Program Chip LP Gas Program Chip Commercial Conversion Kits RTG20225C Natural Gas Commercial Conversion Kit RTG20225D LP Gas Commercial Conversion Kit RTG20224C Natural Gas Commercial Conversion Kit RTG20224D LP Gas Commercial Conversion Kit RTGH-84X RTGH-95X ● ● ● ● ● ● ● ● 4 | for Rheem, Ruud, Rheem-Ruud, Richmond, EcoSense and Paloma tankless water heaters
Parts for RTGH-84X, RTGH-95X series Rheem Part # Program Chip RTG20228V RTG20228W RTG20228R RTG20228S Description Natural Gas Program Chip LP Gas Program Chip Natural Gas Program Chip LP Gas Program Chip Commercial Conversion Kits RTG20225C Natural Gas Commercial Conversion Kit RTG20225D LP Gas Commercial Conversion Kit RTG20224C Natural Gas Commercial Conversion Kit RTG20224D LP Gas Commercial Conversion Kit RTGH-84X RTGH-95X ● ● ● ● ● ● ● ● 4 | for Rheem, Ruud, Rheem-Ruud, Richmond, EcoSense and Paloma tankless water heaters
Parts and Accessories
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... See Page 3 of TKPP-101-2010 for Manifold Controller Information for RTGH-84X, RTGH-95X series Ref # 1 2 3 4 5 5 6 7 8 10 11 12 Rheem Part # RTG20223P RTG20223D RTG20223G RTG20223H RTG20223J RTG20223W RTG20212V RTG20223V RTG20212W RTG20164U RTG20212M RTG20212AB RTG20212AC RTG20212F RTG20212X...RTG20164J RTG20074CE RTG20164AA RTG20223F RTG20223A Description Control Board Inlet Thermistor - Green Outlet Thermistor - Parts for Rheem, Ruud, Rheem-Ruud, Richmond, EcoSense and Paloma tankless water heaters | 5 No Labels or Branding RTGH-84X RTGH-95X Accessories Remote Controls Pipe ...
... See Page 3 of TKPP-101-2010 for Manifold Controller Information for RTGH-84X, RTGH-95X series Ref # 1 2 3 4 5 5 6 7 8 10 11 12 Rheem Part # RTG20223P RTG20223D RTG20223G RTG20223H RTG20223J RTG20223W RTG20212V RTG20223V RTG20212W RTG20164U RTG20212M RTG20212AB RTG20212AC RTG20212F RTG20212X...RTG20164J RTG20074CE RTG20164AA RTG20223F RTG20223A Description Control Board Inlet Thermistor - Green Outlet Thermistor - Parts for Rheem, Ruud, Rheem-Ruud, Richmond, EcoSense and Paloma tankless water heaters | 5 No Labels or Branding RTGH-84X RTGH-95X Accessories Remote Controls Pipe ...
Parts and Accessories
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...1-800-535-9538 Email parts@rheem.com Technical Service 1-800-HEATER3 (1-800-432-8373) Email techserv@rheem.com Website www.rheem.com See Tankless Parts and Accessories 2010 Catalog TKPP-101-10 Rev.1 for Rheem, Ruud, Rheem-Ruud, Richmond, EcoSense and Paloma tankless water heaters 10/10 TKPP-... Rev.1 In keeping with its policy of continuous progress and product improvement, Rheem reserves the right to specific models. Rheem Water Heating 101 Bell Road Montgomery, AL 36117-4305 www.rheem.com Tankless water heaters Endless hot water 6 | for parts and accessories to make ...
...1-800-535-9538 Email parts@rheem.com Technical Service 1-800-HEATER3 (1-800-432-8373) Email techserv@rheem.com Website www.rheem.com See Tankless Parts and Accessories 2010 Catalog TKPP-101-10 Rev.1 for Rheem, Ruud, Rheem-Ruud, Richmond, EcoSense and Paloma tankless water heaters 10/10 TKPP-... Rev.1 In keeping with its policy of continuous progress and product improvement, Rheem reserves the right to specific models. Rheem Water Heating 101 Bell Road Montgomery, AL 36117-4305 www.rheem.com Tankless water heaters Endless hot water 6 | for parts and accessories to make ...
Specifications
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...• Manifold up to six units with an optional MIC-6 manifold control board • Manifold up to 9,840 ft. RTGH-DV Indoor Direct Vent Model 11,000-199,900 Btu/h Natural and LP Gas RTGH-X Outdoor Model 11,000-199,900 Btu/h Natural and LP Gas Formerly... for complete information Commercial Applications The RTGH Condensing Tankless Series can be upgraded for highvolume commercial use. • Temperature range is a series of cold water supply. Residential Gas WI NaTtEeGrR AT ED HOME COMFORT Prestige RTGH Tankless Water Heaters Rheem Prestige™ RTGH is 85°F to 185...
...• Manifold up to six units with an optional MIC-6 manifold control board • Manifold up to 9,840 ft. RTGH-DV Indoor Direct Vent Model 11,000-199,900 Btu/h Natural and LP Gas RTGH-X Outdoor Model 11,000-199,900 Btu/h Natural and LP Gas Formerly... for complete information Commercial Applications The RTGH Condensing Tankless Series can be upgraded for highvolume commercial use. • Temperature range is a series of cold water supply. Residential Gas WI NaTtEeGrR AT ED HOME COMFORT Prestige RTGH Tankless Water Heaters Rheem Prestige™ RTGH is 85°F to 185...
Specifications
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...the N with its policy of Energy) test procedures. Please contact Rheem Canada Ltd. Contact your gas supplier) Indoor Direct Vent 5 1/2" 6 1/4" 27 1/2" Model Number 35° 45°... 1/2" 9 3/4" GPM Water Heater Flow Rate Curves 10 9 8 H95 Max Flow H84 Max Flow 7 6 5 4 3 2 1 0 10 20 35 45 50 60 70 77 80 90 100 120 140 Delta-T Maximum Vent Length (intake/outlet): Number of 90° Elbows 0 or 1...-1/2 18-1/2 9-3/4 N/A 82 .94 94% $194/326 Rheem Prestige RTGH-84 Specifications for RTGH-95 models, up to supply tankless gas water heaters - Outdoor 85° to the model ...
...the N with its policy of Energy) test procedures. Please contact Rheem Canada Ltd. Contact your gas supplier) Indoor Direct Vent 5 1/2" 6 1/4" 27 1/2" Model Number 35° 45°... 1/2" 9 3/4" GPM Water Heater Flow Rate Curves 10 9 8 H95 Max Flow H84 Max Flow 7 6 5 4 3 2 1 0 10 20 35 45 50 60 70 77 80 90 100 120 140 Delta-T Maximum Vent Length (intake/outlet): Number of 90° Elbows 0 or 1...-1/2 18-1/2 9-3/4 N/A 82 .94 94% $194/326 Rheem Prestige RTGH-84 Specifications for RTGH-95 models, up to supply tankless gas water heaters - Outdoor 85° to the model ...
Use and Care Manual
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...fireorexplosionmay resultin asafeplace for naturalgas(N)or propanegas(P)usage. DirectVentModels OutdoorModels Rheem/EcoSense CRTGH-95DV* CRTGH-84DV* CECOH200DV* CECOH160DV* Rheem/EcoSense CRTGH-95X* CRTGH-84X* CECOH200X* CECOH160X* Ruud CRUTGH-95DV* Ruud CRUTGH-95X* Paloma CPHH...department. •Donotreturntoyourhomeuntil authorizedbythegassupplier orfiredepartment. 94% CONDENSING TANKLESS WATER HEATER USE AND CARE MANUAL With Installation Instructions for the Installer Water Heaters for Other Than Recreational Vehicle Installation Only DESIGN...
...fireorexplosionmay resultin asafeplace for naturalgas(N)or propanegas(P)usage. DirectVentModels OutdoorModels Rheem/EcoSense CRTGH-95DV* CRTGH-84DV* CECOH200DV* CECOH160DV* Rheem/EcoSense CRTGH-95X* CRTGH-84X* CECOH200X* CECOH160X* Ruud CRUTGH-95DV* Ruud CRUTGH-95X* Paloma CPHH...department. •Donotreturntoyourhomeuntil authorizedbythegassupplier orfiredepartment. 94% CONDENSING TANKLESS WATER HEATER USE AND CARE MANUAL With Installation Instructions for the Installer Water Heaters for Other Than Recreational Vehicle Installation Only DESIGN...
Use and Care Manual
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... burns. can occur causingdeath,personalinjury,and/orproductdamage. Seepage29forclearancestocombustiblematerials. •Followventmanufacturer'sinstructionsfor properinstallation atinitialstart-upandatleastannuallythereafter.Referto multipleterminations. CAUTIONS: •Ensurethat...orUL1738-listed CategoryIIIStainlessSteel.Noother rooms to death,personalinjury,and/orpropertydamage. •Usetanklesswaterheatermanufacturer-approved Schedule40PVC(foamcoreisnotpermittedat least 18" above the floor. in deathfrom...
... burns. can occur causingdeath,personalinjury,and/orproductdamage. Seepage29forclearancestocombustiblematerials. •Followventmanufacturer'sinstructionsfor properinstallation atinitialstart-upandatleastannuallythereafter.Referto multipleterminations. CAUTIONS: •Ensurethat...orUL1738-listed CategoryIIIStainlessSteel.Noother rooms to death,personalinjury,and/orpropertydamage. •Usetanklesswaterheatermanufacturer-approved Schedule40PVC(foamcoreisnotpermittedat least 18" above the floor. in deathfrom...
Use and Care Manual
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...dealer. However,applicablelocalcodesshallgoverninstallation. Forresidentialwaterheatersofacapacitygreaterthan 52gallonsortankless-style,consultthelocalbuilding jurisdictioncodeforacceptablebracingprocedures. 7 WARNINGS: •Foryour safety,burnerinspection...causepersonal injuries. •Foryoursafety,DONOTattemptrepairofelectrical wiring,gaspiping,remotecontrol,burners,vent connectors,orothersafetydevices.Referrepairsto qualifiedservicepersonnel. Safety IMPORTANT SAFETY INFORMATION Electrical Safety DANGER:ShockHazard...
...dealer. However,applicablelocalcodesshallgoverninstallation. Forresidentialwaterheatersofacapacitygreaterthan 52gallonsortankless-style,consultthelocalbuilding jurisdictioncodeforacceptablebracingprocedures. 7 WARNINGS: •Foryour safety,burnerinspection...causepersonal injuries. •Foryoursafety,DONOTattemptrepairofelectrical wiring,gaspiping,remotecontrol,burners,vent connectors,orothersafetydevices.Referrepairsto qualifiedservicepersonnel. Safety IMPORTANT SAFETY INFORMATION Electrical Safety DANGER:ShockHazard...
Use and Care Manual
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...CAN/CSAB149.1,oneofthefollowing footnote:"Clearanceinaccordancewith section2.20,or b) Areferenceto determinetheproperlocationofthevent terminalfordirectventandoutdoortanklesswaterheaters.Seecorrespondingletterreferenceintheillustrationat left. E=Clearanceto 100,000Btuh(30kW). •36in.(91cm...
...CAN/CSAB149.1,oneofthefollowing footnote:"Clearanceinaccordancewith section2.20,or b) Areferenceto determinetheproperlocationofthevent terminalfordirectventandoutdoortanklesswaterheaters.Seecorrespondingletterreferenceintheillustrationat left. E=Clearanceto 100,000Btuh(30kW). •36in.(91cm...
Use and Care Manual
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...within 6' (1.8 m) Caulk 4' (1.2 m) 12" (300 mm) - Installoutdoorwaterheatersuchthatairinletand flueoutletareaboveanticipatedsnowlevel. 39 INDOORTANKLESSWATERHEATERS WARNING:Formultiple-unitinstallations, aminimumdistancebetweenventterminationsmust beaminimumof5.5inches(14cm)andamaximum of24inches(61cm)aparthorizontally. OUTDOOR...in.(91.4cm)forathree-unit installation; 24in.(61cm),36in.(91.4cm),and24in severedamageto 61cm) - Donotterminateventdirectlyon wallsandunder eaves.
...within 6' (1.8 m) Caulk 4' (1.2 m) 12" (300 mm) - Installoutdoorwaterheatersuchthatairinletand flueoutletareaboveanticipatedsnowlevel. 39 INDOORTANKLESSWATERHEATERS WARNING:Formultiple-unitinstallations, aminimumdistancebetweenventterminationsmust beaminimumof5.5inches(14cm)andamaximum of24inches(61cm)aparthorizontally. OUTDOOR...in.(91.4cm)forathree-unit installation; 24in.(61cm),36in.(91.4cm),and24in severedamageto 61cm) - Donotterminateventdirectlyon wallsandunder eaves.
Use and Care Manual
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...becomecurdled, lumpy,orthickened. •DoNOTthinsolventcement.Observeshelf precautionsprintedon materialcontainers. CAUTION:Usetanklesswaterheater manufacturer-approvedSchedule40PVC(foamcore isnotpermittedatanytime),Schedule80PVC,CPVC, ABSorUL...Stirthesolventfrequentlywhileusing thefollowingmaterial: PVCmaterialsshoulduse ASTMF-493-gradecement. INSTALLATION INSTRUCTIONS VentingforDirect-VentWaterHeater(cont.) Wall Plate (recommended) Downward Slope to Outside termination 12" (300 mm) Approximately 4" recommended Exhaust...
...becomecurdled, lumpy,orthickened. •DoNOTthinsolventcement.Observeshelf precautionsprintedon materialcontainers. CAUTION:Usetanklesswaterheater manufacturer-approvedSchedule40PVC(foamcore isnotpermittedatanytime),Schedule80PVC,CPVC, ABSorUL...Stirthesolventfrequentlywhileusing thefollowingmaterial: PVCmaterialsshoulduse ASTMF-493-gradecement. INSTALLATION INSTRUCTIONS VentingforDirect-VentWaterHeater(cont.) Wall Plate (recommended) Downward Slope to Outside termination 12" (300 mm) Approximately 4" recommended Exhaust...
Use and Care Manual
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...abovefortheproperlocation of theverticalventterminalfordirect-ventindoortanklesswaterheaters: Location U.S.Installation Requirements1 A=Minimumclearanceabovetheroof level. 12in .(61cm)above rooflevel. Venting INSTALLATION INSTRUCTIONS VentingforDirect-VentWaterHeater(cont.) Vertical Vent Terminal Location Optional 12" Min. (300 mm) A, B Vent Pipe Through Roof The followingchartwith building...
...abovefortheproperlocation of theverticalventterminalfordirect-ventindoortanklesswaterheaters: Location U.S.Installation Requirements1 A=Minimumclearanceabovetheroof level. 12in .(61cm)above rooflevel. Venting INSTALLATION INSTRUCTIONS VentingforDirect-VentWaterHeater(cont.) Vertical Vent Terminal Location Optional 12" Min. (300 mm) A, B Vent Pipe Through Roof The followingchartwith building...
Use and Care Manual
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...waterflowthroughthewaterheater. NOTICES: •BesuretoconnecttheCOLDwaterinletandthe HOTwateroutletasshownon alltanklesswater heatersystems.Allkitsincludetwofull-portisolation valvesto preventfreezing,insulate bothCOLDandHOTwatersupplylines.Donot insulate...
...waterflowthroughthewaterheater. NOTICES: •BesuretoconnecttheCOLDwaterinletandthe HOTwateroutletasshownon alltanklesswater heatersystems.Allkitsincludetwofull-portisolation valvesto preventfreezing,insulate bothCOLDandHOTwatersupplylines.Donot insulate...