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Rinnai CVent 

Common Vent Installation Manual 

For the RU98i (REU-KB3237FFUD-US) Condensing Water Heater 

This manual is a supplement to the appliance manual.  

Additional information can be obtained from the Rinnai water heater manual. 

The exhaust vent system, CVent, is supplied by Ubbink. 

—  Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other 

appliance. 

—  WHAT TO DO IF YOU SMELL GAS 

 

Do not try to light any appliance. 

 

Do not touch any electrical switch; do not use any phone in your building. 

 

Immediately call your gas supplier from a neighbor’s phone.  Follow the gas supplier’s instructions. 

 

If you cannot reach your gas supplier, call the fire department. 

—  Installation and service must be performed by a licensed professional. 

If the information in these instructions is not followed exactly, a fire or explosion 
may result causing property damage, personal injury or death. 

     WARNING 

Certified to ANS Z21.10.3 - CSA 4.3 
Only for U.S. installations 

100000287 Version B 
12/2012 

This entire manual must be left for the consumer.  The consumer must read and  

refer to this manual for proper operation and maintenance of the common vent system. 

Summary of Contents for Circ-Logic RU98i

Page 1: ...cal switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire d...

Page 2: ...ons 3 Parts Kits 4 Sample Roof Installation 8 Sample Horizontal Termination Installation 9 Spare Parts List 10 Venting Guidelines 11 Maximum Equivalent Vent Length 12 CVent Termination Clearances 13 E...

Page 3: ...5 1 344 000 3 2 0 45 106 400 8 4 1 528 000 3 2 0 45 121 600 RU98i REU KB3237FFUD US Altitude 0 2000 feet Natural and propane gas Water heaters using CVent will automatically de rate according to the...

Page 4: ...OUT CONDEN 2 1 CVENT COMB AIR ENDPIECE D8 3 1 CVENT CONDENSATE TRAP 32mm Connection 4 1 CVENT DRAIN HOSE 5 2 CVENT DRAIN HOSE CLAMP 6 1 UBBINK INSTALLATION INSTRUCTION 7 1 CENTROCERIN LUBRICANT NO QTY...

Page 5: ...1 CVENT COLLECTOR 2 CONNECTION D8 X L20 2 2 CVENT ELBOW D4 X 87 WITH CLEANOUT 3 2 CVENT EXTENSION D4 X L18 4 2 CVENT APPLIANCE ADAPTER WITH CHECK VALVE AND TRAP 5 1 CVENT COMB AIR COLLECTOR 2 CONNECTI...

Page 6: ...Vent 8 in Chase Cover 790004 CVent 8 in Wall Termination Kit 790031 CVent 8 in Vent Distancer stainless steel 790020 CVent Extension D8 x L18 790034 CVent 8 in Vent Rain Cap 790021 CVent Extension D8...

Page 7: ...g 790002 CVent 8in Vent Rain Cap 790034 Inverter Coupeling Kit With Condensate Trap 790032 CVent Elbow D8x45 degree 790022 Qty 2 CVent Elbow D8x90 degree 790023 CVent Extension D8xL18 790020 D8xL39 79...

Page 8: ...sembly Field Supplied PVC Components Field Supplied 8 PVC Flashing CVent 8 in Roof Termination Kit with PVC Adapter 790001 Cvent pitched roof moldable flashing 790003 CVent 8 in Rain Cap 790034 OPTION...

Page 9: ...art Number 780037 Combustion Air PVC Adapter Kit Qty 1 Part Number 790027 CVent Elbow D4 x 90 Qty 2 Part Number 790005 CVent Starter Kit Qty 1 Part Number 790004 Wall Termination Kit Combustion Air Ex...

Page 10: ...connection 790007 790008 790035 CVent Extension D4 x L18 790007 790008 790039 CVent Elbow D4 x 87degree with cleanout Combustion Air Vent Components 790005 780046 Intake Combustion Air Endpiece 790007...

Page 11: ...uns by installing supports per the vent manufacturer s instructions Support horizontal vent runs a minimum of every four feet and all vertical vent runs a minimum of every six feet Venting should be a...

Page 12: ...the header due to increased spacing of the water heaters Header kits have already been counted and do not need to be added Clearances of Brackets All supports such as wall brackets on the external fa...

Page 13: ...From edge of exhaust termination to edge of combustion air termination Minimum of 36 inches Maximum of 20 feet 4 36 inch minimum from multiple exhaust CVents There should be a minimum of 36 inches bet...

Page 14: ...12 inches 30 cm B Clearance to window or door that may be opened 12 inches 30 cm C Clearance to permanently closed window D Vertical clearance to ventilated soffit located above the terminal within a...

Page 15: ...apor could create a nuisance or hazard or cause property damage or Where condensate or vapor could cause damage or could be detrimental to the operation of regulators relief valves or other equipment...

Page 16: ...4 inches in front of the water heater to side to front to top to floor ground Maintenance Clearances Back to Back Configuration In Line Configuration Follow the recommended minimum service clearances...

Page 17: ...vent system is not compromised Install the elbows with hand cleanout cap to the 4 diameter extension pipe Do not cut or modify the elbow Cleanout cap should remain accessible for periodic inspection a...

Page 18: ...of every 4 feet and all vertical vent runs a minimum of every 6 feet The materials described below can only be used on the combustion air vent The Ubbink Polypropylene CVent can be used on both the c...

Page 19: ...the common vent remotely from the water heaters The installation area should be measured to make sure that adequate space is available to install the water heaters and venting system NOTE Dimensions a...

Page 20: ...codes Inspectors can reject the installation if the rating plate cannot be seen for all water heaters D4 Extension Pieces must be cut appropriately to maintain the required 3 slope If common venting w...

Page 21: ...el that will help prevent corrosion of the drain and public sewer system Ensure that the condensate drain does not freeze Long Vent Run or Restricted Rise An inverter coupling kit with a condensate tr...

Page 22: ...the check valve out For smaller particles under 1mm we advise to use a sufficient amount of luke warm water to flush the adapter Do not use detergents or solvents for cleaning the check valve When app...

Page 23: ...No 1 in the SW1 DIP switch tan switches has been adjusted moved to OFF in each water heater Explain to the customer the importance of not blocking the vent termination or air intake Explain to the cu...

Page 24: ...he following reasons Use of the CVent system not in accordance with the regulations Improper assembly and incorrect operation Faulty maintenance Non compliance with the assembly and operating instruct...

Page 25: ...14 Installation and maintenance of the Check Valves 31 A15 Clearances of brackets 31 A16 Freestanding components 31 A17 Inspection after assembly 31 A18 Application manufacturer s Information 32 A1 Pr...

Page 26: ...ndustrial safety regulations These must especially be complied with unconditionally and at any time when working on roofs and fa ades A4 Transport and storage When transporting CVent Common Vent Syste...

Page 27: ...l Direction and Assembly of Seals Seals are pre assembled in the vent components If a seal is missing or dam aged this component should not be used or an appropriate seal must be in stalled Use ONLY C...

Page 28: ...ing 3rd party condensate valves or a hose loop DO need priming to be effective Do not fire the appliances before the condensate traps are inspected and or primed otherwise flue gasses can escape form...

Page 29: ...to item 5 Terminal Outer Shell Confirm full engagement before proceeding 3 Position item 4 Terminal Clamp Ring over the joint between items 1 5 With the terminal clamp ring in place tighten the clamp...

Page 30: ...s are connected to a drain and comply with local code All condensate traps have been primed There are no obstructions in the combustion air or exhaust vent runs Both intake and exhaust terminations ar...

Page 31: ...pacer blocks in a shaft must be assembled in a maximum distance of 6ft 2m Where there is an bend additional spacer blocks or wall brackets can be planned before and after the bend depending on the loc...

Page 32: ...by the installer after release of the system Installation date of the system chimney Number of entries appliances Nominal diameter of the selected system chimney Constructor of the chimney with full...

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