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.
Certified to ANS Z21.10.3 - CSA 4.3
Only for U.S. installations
WARNING If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death.
—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.
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.
1 |
Rinnai CVent |
Table of Contents |
|
Installer Qualifications .......................................... |
2 |
Description............................................................ |
2 |
Model Applicability............................................... |
2 |
Safety Symbols...................................................... |
3 |
Warranty and Liability Exclusions ......................... |
3 |
Specifications ........................................................ |
3 |
High Altitude Installation ...................................... |
4 |
Water Heater Installation ..................................... |
4 |
Parts/Kits............................................................... |
5 |
Sample Roof Installation....................................... |
9 |
Sample Horizontal Termination Installation………. 10 |
|
Spare Parts List………………………………………………….11 |
Venting Guidelines .............................................. |
12 |
Maximum Equivalent Vent Length...................... |
13 |
CVent Termination Clearances............................ |
14 |
Exhaust Vent Termination Clearances ................ |
15 |
CVent Maintenance Clearances .......................... |
17 |
Water Heater Clearances.................................... |
17 |
CVent Installation Instructions............................ |
18 |
Common Header Check valve Maintenance....... |
23 |
Final Checklist...................................................... |
24 |
Appendix |
|
Ubbink CVent Assembly Instructions .................. |
25 |
Installer Qualifications
WARNING Improper installation of the vent system and components, or failure to follow all installation instructions, can result in serious injury.
A licensed professional must install the common |
If you lack these skills, contact a licensed professional. |
venting. |
|
The installer should have skills such as |
|
connecting gas lines, water lines, valves, and electricity
knowledge of applicable national, state, and local codes
Description
The CVent Common Venting system provides longer vent lengths and fewer wall or roof penetrations than conventional single-unit venting. For the exhaust flue, CVent utilizes a CSA-certified and tested polypropylene venting material from Ubbink, the same supplier for Rinnai's innovative line of concentric venting. The various sections are self locking and sealing and can be pushed together without use of cement or glue.
CVent is only for use in U.S. installations and is not currently approved for use in Canada.
Installation is certified for up to 10,200 feet. Refer to the installation / operations manual for the tankless engine (RU98) for appropriate dip switch selection. Refer to High Altitude Installation section for appropriate de-rate values.
Model Applicability
The common vent system is CSA certified (ANSI Z21.10.3, Gas Water Heaters Standards) for use only with the Rinnai tankless condensing water heater RU98i (REU-KB3237FFUD-US).
Rinnai CVent |
2 |
Safety Symbols
This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and others.
DANGER
WARNING
CAUTION
Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. It may also be used to alert against unsafe practices.
Warranty and Liability Exclusions
Claims for personal and material damages are excluded, if they are due to any or several of the 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 instructions.
•Non-approved structural changes to the unit or to the individual components.
•Installation of components which are not part of the Cvent system .
•Subsequent damage, which occurred through further use of the Cvent system despite known defects.
•Intentional damage.
•Acts of God.
Specifications
Water heaters using CVent will automatically de-rate according to the table below. Use the table below for calculating your total Btu for multiple water heaters using CVent.
* RU98i (REU-KB3237FFUD-US)
Altitude: 0-2,000 feet
Natural and propane gas
Number of |
Percent |
|
Btu at |
Btu at |
|
water |
Total Btu Rate |
Minimum Rate |
Minimum Rate |
|
|
De-rated |
|
||||
heaters* |
|
(without MSB) |
(with MSB) |
|
|
|
|
|
|||
|
|
|
|
|
|
1 |
0% |
199,000 |
15,200 |
|
|
|
|
|
|
|
|
2 |
1% |
394,000 |
30,400 |
|
|
|
|
|
|
|
|
3 |
1.5% |
588,000 |
45,600 |
|
|
|
|
|
|
|
|
4 |
2% |
780,000 |
60,800 |
15,200 |
|
|
|
|
|
|
|
5 |
2.5% |
970,000 |
76,000 |
|
|
|
|
||||
|
|
|
|
|
|
6 |
3% |
1,158,000 |
91,200 |
|
|
|
|
|
|
|
|
7 |
3.5% |
1,344,000 |
106,400 |
|
|
|
|
|
|
|
|
8 |
4% |
1,528,000 |
121,600 |
|
|
|
|
|
|
|
|
|
|
3 |
|
|
Rinnai CVent |
High Altitude Installations
The Rinnai RU98i (REU-KB3237FFUD-US) has been certified for use with the CVent Common Exhaust Vent System at high altitude installations up to 10,200 feet. (3,109 m). The common vent system is CSA certified (ANSI Z21.10.3, Gas Water Heaters Standards) for use only with the Rinnai tankless condensing water heater RU98i (REU-KB3237FFUD-US).
For CVent installations at altitude you must ensure that the water heaters are properly installed and setup for the altitude that they will be operating at. (For information on how to adjust altitude settings reference the installation/ operations manual for the RU98i (REU-KB3237FFUD-US) tankless water heater)
Water heaters using CVent at altitudes over 2,000ft will automatically de-rate according to the table below. Use the tables below for calculating your total Btu for multiple water heaters using CVent at elevation:
* RU98i (REU-KB3237FFUD-US) Altitude: 2,001-10,200 feet Natural and propane gas
High Altitude De-Rate plus Cvent De-Rate - Natural Gas
Number |
|
|
|
of Water |
|
|
|
Heaters |
2001-5200 Ft |
5201 - 7700 Ft |
7701 - 10200 Ft |
1 |
170,000 |
153,000 |
139,000 |
2 |
336,600 |
302,940 |
275,220 |
3 |
499,800 |
449,820 |
408,660 |
4 |
659,600 |
593,640 |
539,320 |
5 |
816,000 |
734,400 |
667,200 |
6 |
969,000 |
872,100 |
792,300 |
7 |
1,118,600 |
1,006,740 |
914,620 |
8 |
1,264,800 |
1,138,320 |
1,034,160 |
High Altitude De-Rate plus Cvent De-Rate - LP Gas
Number |
|
|
|
of Water |
|
|
|
Heaters |
2001-5200 Ft |
5201 - 7700 Ft |
7701 - 10200 Ft |
1 |
168,000 |
151,000 |
120,000 |
2 |
332,640 |
298,980 |
237,600 |
3 |
493,920 |
443,940 |
352,800 |
4 |
651,840 |
585,880 |
465,600 |
5 |
806,400 |
724,800 |
576,000 |
6 |
957,600 |
860,700 |
684,000 |
7 |
1,105,440 |
993,580 |
789,600 |
8 |
1,249,920 |
1,123,440 |
892,800 |
Water Heater Installation
For information regarding the installation of the RU98i (REU-KB3237FFUD-US) tankless water heater, please reference the installation operations manual included with the tankless unit.
Set the water heater for “Long Vent” by adjusting the # 1 switch to the OFF Position. (Must be done on all tankless heaters when using CVent System)
4 |
Rinnai CVent |
CVent Starter Kit 790005
8-Inch For Back–2-Back or InLine Combustion Air & Exhaust
NO |
QTY |
DESCRIPTION |
|
|
CVENT ENDPIECE (EXHAUST) W/ CLEANOUT & CONDEN- |
1 |
1 |
SATE DRAIN (32mm) |
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 |
|
Qty. 1 |
3 Qty. 1 |
Qty. 1 |
1 |
4 |
2 |
Qty. 1 |
5 |
Qty. 2 |
|
7
CVent InLine Kit 790007
8-Inch Header Kit For InLine Combustion Air & Exhaust
NO QTY DESCRIPTION
11 CVENT COLLECTOR, 1 CONNECTION, D8 X L20 X D4 (Exhaust)
21 CVENT ELBOW D4 X 87° WITH CLEANOUT
31 CVENT EXTENTION, D4 X L18
41 CVENT APPLIANCE ADAPTER, CHECK VALVE AND HOSE TRAP
51 CVENT COMB. AIR COLLECTOR, 1 CONNECTION, D8 X L20 X D3
61 CVENT COMB AIR FLEX FITTING, D3
71 CENTROCERIN LUBRICANT
1 Qty. 1 |
5 Qty. 1 |
|
Ø4” |
Ø3” |
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|
|
Qty. 1 |
|
Qty. 1 |
2 |
|
4 |
|
Qty. 1 |
Qty. 1 |
3 |
6 |
7
5 |
Rinnai CVent |
CVent Back-2-Back Kit 790008
8-Inch Header Kit For Back-2-Back Combustion Air & Exhaust
NO |
QTY |
DESCRIPTION |
1 |
1 |
CVENT COLLECTOR, 2 CONNECTION, D8 X L20 |
2 |
2 |
CVENT ELBOW D4 X 87° WITH CLEANOUT |
3 |
2 |
CVENT EXTENSION, D4 X L18 |
|
|
CVENT APPLIANCE ADAPTER WITH CHECK |
4 |
2 |
VALVE AND TRAP |
|
|
CVENT COMB. AIR COLLECTOR, 2 CONNECTION, |
5 |
1 |
D8 X L20 X D3 |
6 |
2 |
CVENT COMB. AIR FLEX FITTING, D3 |
7 |
1 |
CENTROCERIN LUBRICANT |
1 |
Qty. 1 |
5 |
Qty. 1 |
Ø3” |
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Ø4” |
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Ø4” |
Ø3” |
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Qty. 2 |
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Qty. 2 |
2 |
|
4 |
3 Qty. 2 |
6 Qty. 2 |
7
Rinnai CVent |
6 |
Parts / Kits
CVent Common Venting Exhaust / Intake Components (PPtl, polypropylene translucent)
Part No. |
Description |
|
Part No. |
Description |
790005 |
CVent 8-in Starter Kit |
|
790024 |
CVent 8-in Brackets |
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790007 |
CVent 8-in InLine Kit |
|
790025 |
Centrocerin lubricant |
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790008 |
CVent 8-in Back-2-Back Kit |
|
790035 |
CVent Extension, D4 x L18 |
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790001 |
CVent 8-in Roof Termination Kit |
|
790028 |
CVent Extension, D4 x L39 |
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790002 |
CVent 8-in Flat Roof Flashing |
|
790029 |
CVent Elbow D8 x 90 degree Vertical Support |
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790003 |
CVent 8-in Pitched Roof Flashing |
|
790030 |
CVent 8-in Chase Cover |
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790004 |
CVent 8-in Wall Termination Kit |
|
790031 |
CVent 8-in Vent Distancer, stainless steel |
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790020 |
CVent Extension, D8 x L18 |
|
790034 |
CVent 8-in Vent Rain Cap |
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|
790021 |
CVent Extension, D8 x L39 |
|
790032 |
Inverter Coupling Kit with condensate trap |
|
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790022 |
CVent Elbow D8 x 45degree (2 in a box) |
|
790037 |
Combustion Air PVC Adapter Kit |
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790023 |
CVent Elbow D8 x 90degree |
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|
Termination Kits
Cvent 8-in Roof Termination Kit with PVC adapter 790001
PP-PVC |
Centrocerin |
CVent 8-in Roof Termination |
|
Adapter |
Lubricant |
||
(Outer shell: Stainless Steel) |
|||
(For Combustion Air |
|
||
PVC transition) |
|
|
Cvent 8-in Wall Termination Kit (Combustion Air & Exhaust)
790004
|
|
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Ø0.24” (Qty. 4) |
||
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31” |
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|
Ø7.89” |
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Ø12.2” |
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||
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Centrocerin lubricant
Interior Slip |
|
Fit Wall Plate |
(Material: Stainless Steel) |
7 |
Rinnai CVent |
8 INCH VENT COMPONENTS
CVent Elbow D8x90 degree |
CVent Elbow D8x45 degree |
CVent Elbow D8x90 degree |
#790023 |
#790022 (Qty.2) |
Vertical Support #790029 |
Inverter Coupeling Kit With Condensate Trap |
CVent Extension D8xL18” #790020, |
|
D8xL39” #790021 |
||
#790032 |
||
|
Combustion Air PVC Adapter Kit
#790037
CVent 8in Vent Rain Cap |
CVent 8-in |
CVent 8in Vent |
|
Bracket #790024 |
Distancer #790031 |
||
#790034 |
|||
|
|
CVent Flat Roof Flashing
#790002 CVent 8-in Chase Cover
#790030
CVent Pitched Roof Flashing (Including
Storm Collar) #790003
8 |
Rinnai CVent |
4 INCH VENT COMPONENTS
CVent Extension
D4xL18 #790035
D4xL39 #790028
Sample Roof Assembly
OPTIONAL
CVent 8-in Rain Cap
#790034
NOTE: Use PVC adapter (illustrate above) at the combustion air header when transitioning to PVC
CVent 8-in Roof Termination Kit with PVC Adapter #790001
Cvent pitched roof moldable flashing #790003
9
Field Supplied
PVC Components
Field Supplied 8”
PVC Flashing
Rinnai CVent
Sample Horizontal Termination Assembly
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Part Number:790020 / 790021 |
|
Part Number:790004 |
Part Number:790027 |
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||
|
CVent Extension (Qty. 5) |
|
Wall Termination Kit |
|
CVent Elbow D4 x 90 |
|
|
|
Combustion Air & Exhaust (Qty 2) |
|
|
|||
(Qty. 2) |
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Field Supplied
PVC Components
Part Number: 790008
CVent Back-2-Back Kit (QTY. 4)
Part Number: 790005
CVent Starter Kit (Qty. 1)
Part Number:790037
Combustion Air PVC Adapter
Kit (Qty. 1)
Field Supplied
PVC Components
10 |
Rinnai CVent |
Spare Parts List
Included |
Part |
|
|
|
With Kit |
Description |
Image |
||
No. |
||||
No. |
|
|
||
|
|
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||
|
|
Exhaust Vent Components |
|
|
790005 |
790042 |
CVent Endpiece |
Ø8 |
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||||
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|
|
|
|
790005 |
790048 |
Condensate Trap (32mm Connection) |
|
|
|
|
|
|
|
790005 |
790049 |
Hose + 2 Clamps |
|
|
|
|
|
|
|
790007 |
790040 |
Exhaust Collector, 1 connection, D8 x L20, D4 connection |
Ø8 |
|
|
||||
|
|
|
Ø4 |
|
|
|
|
|
|
|
|
|
Ø4 |
|
790008 |
790041 |
Exhaust Collector, 2 connections, D8 x L20, D4 connection |
Ø8 |
|
|
|
|
||
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|
Ø4 |
|
|
|
|
|
|
790007 |
|
|
Ø4 |
|
790035 |
CVent Extension, D4 x L18 |
|
||
790008 |
|
|||
|
|
|
||
|
|
|
|
|
790007 |
790039 |
CVent Elbow D4 x 87degree with cleanout |
|
|
790008 |
|
|||
|
|
Ø4 |
||
|
|
|
||
|
|
|
|
|
|
|
Combustion Air Vent Components |
|
|
790005 |
780046 |
Intake/Combustion Air Endpiece |
Ø8 |
|
|
||||
|
|
|
|
|
790007 |
780044 |
Combustion Air Collector, 1 connection, D8 x L20, D3 connection |
Ø8 |
|
|
||||
|
|
|
Ø3 |
|
|
|
|
|
|
|
|
|
Ø3 |
|
790008 |
780045 |
Combustion Air Collector, 2 connection, D8 x L20, D3 connection |
Ø8 |
|
|
|
|
Ø3 |
|
|
|
|
|
|
|
|
|
Ø3 |
|
790007 |
|
|
Ø3 |
|
780050 |
CVent flex Line D3 |
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||
790008 |
|
|||
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||
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Appliance Adapter |
|
|
|
|
|
Ø4 |
|
790007, |
790038 |
CVent Appliance and Check Valve & hose (new!) |
|
|
790008 |
|
|||
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||
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|
Ø3 |
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11 |
Rinnai CVent |