Rinnai RU80i Manual
Twin pipe pvc/cpvc venting guide for condensing
tankless water heaters
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Also See for RU80i:
- Installation and operation manual (107 pages) ,
- Service manual (60 pages) ,
- Manual (12 pages)
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Summary of Contents for Rinnai RU80i
- Page 1 TWIN PIPE PVC/CPVC VENTING GUIDE FOR CONDENSING TANKLESS WATER HEATERS...
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Page 2: Table Of Contents
Table of Contents Table of Contents ............2 11a: Two or more Vent Terminals on Same Level 17 Introduction ..............3 11b: Vertical between Terminals ......17 Warnings and Notices ........... 4 12: Sidewall Vent and Combustion Air Piping Installation Instructions ..........5 with Tee Termination ........... -
Page 3: Introduction
U.S. and Canada. The Concentric to Twin Pipe Adaptor is supplied exclusively through Rinnai and/or its distributors. These changes are immediate and can be implemented on existing RU units (not RC units) already in distribution. -
Page 4: Warnings And Notices
The exhaust and air piping must be installed as instructed in this guide and applicable Water Heater Manual. The chimney must be used only for Rinnai Water Heater(s) vent chase. NO OTHER appliance or fireplace can be connected to the chimney. Exhaust and air piping materials must comply with this instruction. -
Page 5: Installation Instructions
Installation should be performed by a licensed If the preferred venting option is a twin pipe PVC/ professional CPVC configuration, the Rinnai approved twin pipe adaptor must be used. All PVC/CPVC IPEX Concentric Vent Kit (CVK) assemblies are certified to ULC S636. Where ULC S636 compliance is required, use only System 636 pipe, fittings and cement at terminal connection. -
Page 6: Determine Installation Location
If common venting is required, refer to Rinnai contain these corrosive compounds. If it is necessary Common Vent Installation Manual (latest revision) for a water heater to be located in areas which may... -
Page 7: Vent Termination Clearances
Vent Termination Clearances Table 2 Recommended Vent/Combustion Air Intake Terminal Position Terminals should be positioned to avoid products of combustion entering openings into buildings or other vents. Maintain 12” clearance above grade INSIDE CORNER DETAIL or highest anticipated snow level (whichever is greater). -
Page 8: 2: Required Clearances For Ubbink Concentric Pp, Pvc/Cpvc Snorkel And Tee Terminations
Additional Clearance Requirements: Important considerations for locating vent Avoid termination locations near a dryer vent. termination under a soffit (ventilated or Avoid termination locations near commercial unventilated or eave vent; or to a deck or porch): cooking exhaust. ... -
Page 9: Determining Vent Lengths
Determining Total System Equivalent Length There are two options for determining the vent lengths/components necessary for the installation. Option 1: The installer can use the vent length calculation sheet (below), filling in the quantity of the vent components in order to calculate the total equivalent vent lengths. Option 2: The installer can use the maximum vent lengths tables on the next pages to determine the amount of straight pipe that can be used with a specific termination type and quantity of elbows. -
Page 10: Maximum Vent Lengths
OPTION 2: Maximum Equivalent Vent Length Tables: 1. Determine the number of 90 degree elbows in the vent system. (two 45 degree elbows count as one 90 degree elbow.) 2. Refer to Tables 4-7 to find the maximum vent length based on the number of elbows and termination style. Table 4 - Natural Gas Units Total Equivalent Vent Length (Intake/outlet) for Twin Pipe 3"... -
Page 11: 6: Lp Units Total Vent Length For Twin Pipe
Option 2: Maximum Vent Length Tables (continued) Table 6 - Propane Units Total Equivalent Vent Length (Intake/outlet) for Twin Pipe 3" PVC/CPVC 41 Feet Maximum Vent Length IPEX Snorkel Side Wall Tee Low Profile Concentric Vent Termination Type Termination Termination Termination Termination Equivalent Length in feet (meters) (Already factored into the straight... -
Page 12: Adaptor Installation
a gasket is damaged, these are available through Install the system in according to Ubbink/Rolux, and Rinnai Installation Instructions. Rinnai and its distributors. Do not use gaskets from another manufacturer. Use the 3”/5” Concentric to Twin pipe Adaptor with 3”... -
Page 13: 4: 3/5 Concentric To Twin Pipe Adaptor
Adaptor Installation (continued) STEP 4: NOTICE Use PVC to Polypropylene Eccentric Increaser (supplied with the adaptor) to transition from PP to For further details on listed PVC/CPVC venting PVC 3”; additional PVC/CPVC bushing, or other type material (Table 2) and proper handling and of reducing fittings is required to transition to 4”... -
Page 14: 6: Required Parts For 3" Pvc/Cpvc Assembly Configuration
Adaptor Installation (continued) Installation Examples for PVC/CPVC Twin Pipe Venting Note the correct position of combustion air inlet and gas flue outlet, as these are NOT interchangeable. For the correct position and design of the twin pipe gas flue outlet and combustion air inlet refer to the installation instructions supplied with the appliance. -
Page 15: Vent Termination
Certified PVC/CPVC Vent Termination Options Vent Termination Configurations WARNING There are three configurations for vent terminations Danger of fire or bodily injury – Solvent cements and that can be used: primers are highly flammable. Provide adequate 1. Concentric Termination (IPEX Concentric Vent Kit) ventilation and do not assemble near heat source or -Allows for only one penetration through a wall or roof. -
Page 16: 10: Twin Pipe To Concentric Termination Data
Certified PVC/CPVC Vent Termination Options (continued) IPEX Concentric Vent Kit Assembly (System 636): MECHANICALLY FASTENED RAIN CAP: 1. Once the proper location has been determined, cut The Rain Cap must be installed with the supplied Stainless Steel screw and lock nut, and in accordance a hole in the roof or wall large enough to with the instructions and diagram below. -
Page 17: 11A: Two Or More Vent Terminals On Same Level 17 11B: Vertical Between Terminals
ACCEPTABLE VENTING CLEARANCES FOR IPEX CONCENCTRIC VENT KIT (CVK) TERMINATION: 24” MIN to next CVK Figure 11a: T WO OR ERMINALS ON SAME LEVEL Soffit Reference “General Clearance Ceiling Requirements” section of this guide for important considerations for locating vent termination under a soffit (ventilated or unventilated), eave, or deck/porch. -
Page 18: 8: Approved Pvc/Cpvc Vent Configurations
Table 8: Approved PVC/CPVC Vent Configurations Rinnai 3" or 4" Rinnai 3" or 4" PVC/CPVC PVC/CPVC Concentric Concentric Side Wall Vertical Termination Termination Configuration Configuration Rinnai 3" or 4" Rinnai 3" or 4" PVC/CPVC PVC/CPVC Standard Snorkel upside down Termination "U"... -
Page 19: Ipex Low Profile Vent Termination Kits
Certified PVC/CPVC Vent Termination Options (continued) 3” and 4” Low Profile Vent Termination Kits Kit Contents Item Description The following information should be used in conjunction with the IPEX System 636 Installation Guide: Base (Two Holes) Termination kits are to be tested and certified for Cap (One Hole) use with the brand of pipe-fitting-cement system Stainless Steel Screws... -
Page 20: Twin Pipe (Pvc/Cpvc) Termination
Certified PVC/CPVC Vent Termination Options (continued) Twin Pipe (PVC/CPVC) Terminations NOTICE PVC/CPVC Sidewall (Tee and Snorkel) Slope horizontal exhaust piping downward toward the Terminations: water heater a minimum of 1/4 inch per foot. DO NOT slope combustion air piping down towards water Locate the vent and intake air termination using the following guidelines: heater. -
Page 21: Roof (Tee And Upside Down "U")
Certified PVC/CPVC Vent Termination Options (continued) NOTE Vent Termination Combustion air termination All figures shown in this section is in reference to flat roofs. For heights of venting passing through a pitched roof, refer to NFPA 54/ANSI Z223.1-09 (table 12” min 12”... -
Page 22: 17: Vertical Termination Of U-Vent And Combustion Air Pipe On A Pitched Roof
Certified PVC/CPVC Vent Termination Options (continued) NOTICE 3. Apply a thin coat of cement evenly in the socket. To prevent possibility of condensate freeze-up, do not Quickly apply a heavy coat of cement to the pipe install vent kits one above the other. Once the vent and insert pipe into fitting with a slight twisting terminal location has been determined, make holes motion until it bottoms out. -
Page 23: Parts Information
Parts Information Figure 18: Ubbink® Concentric to Twin Pipe Adaptor Lubricant can be applied on the seals, only use the Ubbink approved lubricant Exhaust that is supplied in this package Vent Combustion Air Physical Data in inches (mm) Nominal Part # Overall Height Effective Height Offset... -
Page 24: 10: Approved Pvc/Cpvc Vent Components
Parts Information (continued) Vent Components and Assigned Equivalent Lengths: The following fittings and accessories (by others) are certified for use with the above mentioned condensing products: Table 10: Approved PVC/CPVC Termination Components Product Equivalent OEM # orCert. Diagram Description Length (Ft.) 196006 / 197009 IPEX (3 Inch) -
Page 25: Vent Length Calculation Sheet
Equivalent Vent Length Calculation Sheet Number of Equivalent Vent Total Equivalent Fitting / Termination Type fittings Length Length 90 elbow 45 elbow IPEX Low Profile Termination IPEX 4" Concentric Termination IPEX 3" Concentric Termination 3" Tee Termination 4" Tee Termination 3"... - Page 26 NOTES...
- Page 27 NOTES...
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