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Direct Vent Tankless Water Heater
Installaon and Operaon Manual
Do not store or use gasoline or other ammable 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 instrucons.
If you cannot reach your gas supplier, call the re department.
Installaon and service must be performed by a licensed professional.
This enre manual must be le for the consumer. The consumer must read and
refer to this manual for proper operaon and to maintain the water heater.
If the informaon in these instrucons is not followed exactly, a re or explosion
may result causing property damage, personal injury or death.
WARNING
READ ALL OF THE INSTRUCTIONS THOROUGHLY BEFORE INSTALLING OR OPERATING THIS WATER HEATER.
This manual provides informaon on the installaon, operaon, and maintenance of the water heater. For proper
operaon and safety, it is important to follow the instrucons and adhere to the safety precauons.
A licensed professional must install the water heater according to the exact instrucons on pages 4-27.
The consumer must read the enre manual to properly operate the water heater and to have regular maintenance
performed.
ANS Z21.10.3 CSA 4.3
FOR INDOOR APPLICATIONS ONLY
V94i ...................... REU-VC2837FFU-US
V94Xi .................... REU-VC2737FFU-US
V75i ...................... REU-VC2528FFU-US
V65i ...................... REU-VC2025FFU-US
FOR OUTDOOR APPLICATIONS ONLY
V94e ..................... REU VC2837W- -US
V75e ..................... REU VC2528W- -US
V65e ..................... REU VC2025W- -US
SANITATION
Low Lead Content
NSF/ANSI 372
C US
2 Value Series Manual
Table of Contents
This is the safety alert symbol. This symbol alerts you to potenal hazards that can kill or hurt you
and others.
Indicates an imminently hazardous situaon which, if not avoided, will result in death or
serious injury.
Indicates a potenally hazardous situaon which, if not avoided, could result in death or
serious injury.
Indicates a potenally hazardous situaon which, if not avoided, could result in minor or
moderate injury. It may also be used to alert against unsafe pracces.
DANGER
CAUTION
WARNING
Table of Contents ..................................................... 2
Safety Behaviors and Pracces for the
Consumer and Installer ............................................ 3
Installaon Instrucons
(for the licensed professional) 4 .............................
Prepare for Installaon ...................................... 5
Determine Installaon Locaon ........................ 6
Freeze Protecon ............................................. 11
Checklist to Determine Installaon Locaon ... 12
Mount to Wall.................................................. 12
Remove the Front Panel .................................. 12
Installaon of Venng (indoor models only) ... 13
Condensate (indoor models only).................... 15
Checklist for Venng and Condensate
(indoor models only) ........................................ 15
Installaon of Plumbing ................................... 16
Checklist for Plumbing ..................................... 18
Installaon of Gas Supply ................................ 18
Connect Electricity ........................................... 20
Adjust for High Altude ...................................20
Adjust for Vent Length (indoor models only) .. 20
Checklist for Gas and Electricity ....................... 20
Installaon of Temperature Controller ............ 21
Final Checklist................................................... 23
Technical Data ........................................................ 24
Specicaons ................................................... 24
Dimensions....................................................... 25
Pressure Drop and Water Flow Curves ............ 26
Ladder Diagram................................................ 27
Operaon Instrucons ....................................... 28
Consumer Operaon Guidelines for the
Safe Operaon of your Water Heater .............. 29
How to Use the Temperature Controller ......... 30
How to Set the Temperature ........................... 31
Diagnosc Codes .............................................. 33
Required Maintenance.....................................36
Freeze Protecon and Winterizaon ........37
Flushing the Heat Exchanger .....................38
Manual Draining of the Water Heater ......39
State Regulaons .................................................... 40
Replacement Parts ................................................. 41
Consumer Warranty ............................................... 42
French Version ........................................................ 44
Important Safety Informaon
Safety Denions
NOTICE: Rinnai somemes shares customer contact informaon with businesses that we believe provide
products or services that may be useful to you. By providing this informaon, you agree that we can
share your contact informaon for this purpose. If you prefer not to have your informaon shared with
these businesses, please contact customer service and ask not to have your informaon shared. We
will however, connue to contact you with informaon relevant to the product(s) you registered and/
or you account with us.
If you have any quesons or feel that the manual is incomplete contact Rinnai at 1 800 621 9419--- .
Value Series Manual 3
CAUTION
BURN HAZARD. Hot exhaust and vent may cause
serious burns. Keep away from the water heater
unit. Keep small children and animals away from
the unit.
Hot water outlet pipes leaving the unit can be hot
to touch. In residenal applicaons, insulaon
must be used for hot water pipes below due to 36”
burn risk to children.
Safety Behaviors and Pracces for the Consumer and Installer
Before operang, smell all around the appliance
area for gas. Be sure to smell next to the oor
because some gas is heavier than air and will sele
on the oor.
Keep the area around the appliance clear and free
from combusble materials, gasoline, and other
ammable vapors and liquids.
Combusble construcon refers to adjacent walls
and ceiling and should not be confused with
combusble or ammable products and materials.
Combusble and/or ammable products and
materials should never be stored in the vicinity of
this or any gas appliance.
Always check the water temperature before
entering a shower or bath.
To protect yourself from harm, before performing
maintenance:
Turn o the electrical power supply by
unplugging the power cord or by turning o the
electricity at the circuit breaker. (The
temperature controller does not control the
electrical power.)
Turn o the gas at the manual gas valve, usually
located immediately below the water heater.
Turn o the incoming water supply. This can be
done at the isolaon valve immediately below
the water heater or by turning o the water
supply to the building.
WARNING
Use only your hand to push in or turn the gas
control knob. Never use tools. If the knob will not
push in or turn by hand, do not try to repair it; call a
licensed professional. Force or aempted repair
may result in a re or explosion.
Do not use this appliance if any part has been under
water. Immediately call a licensed professional to
inspect the appliance and to replace any part of the
control system and any gas control which has been
under water.
Do not use substute materials. Use only parts
cered for the appliance.
Should overheang occur or the gas supply fail to
shut o, turn o the manual gas control valve to the
appliance.
Do not adjust the DIP switch unless specically
instructed to do so.
Do not use an extension cord or an adapter plug
with this appliance.
Any alteraon to the appliance or its controls can be
dangerous and will void the warranty.
Proper venng is required for the safe operaon of
this appliance.
Ensure appliance venng is not blocked or parally
blocked.
Ensure that in cases of freezing weather the water
heater and its water lines are protected to prevent
freezing.
California law requires this noce to be provided:
California Proposion 65:
This product contains chemicals known to the state of California to cause cancer, birth defects, or other
reproducve harm.
WARNING
4 Value Series Manual
It is recommended that a licensed professional install
the appliance, inspect it, and leak test it before use.
The warranty may be voided due to any improper
installaon.
The installer should have skills such as:
gas sizing
connecng gas lines, water lines, valves,
electricity,
knowledge of applicable naonal, state, and
local codes.
installing venng through a wall or roof
training in installaon of tankless water heaters.
(Training can be accessed online at
www.trainingevents.rinnai.us)
Installaon Instrucons (for the licensed professional)
Installaon Steps
Prepare for Installaon ...................................... 5
Determine Installaon Locaon ......................... 6
Checklist to Determine Installaon Locaon ... 12
Mount to Wall .................................................. 12
Remove the Front Panel ..................................12
Installaon of Venng (indoor models only) ... 13
Condensate (indoor models only) .................... 15
Checklist for Venng and Condensate
(indoor models only) ........................................ 15
Installaon of Plumbing ................................... 16
Checklist for Plumbing ..................................... 18
Installaon of Gas Supply................................. 18
Connect Electricity ........................................... 20
Adjust for High Altude ...................................20
Adjust for Vent Length (indoor models only) ..20
Checklist for Gas and Electricity ....................... 20
Installaon of Temperature Controller ............ 21
Final Checklist...................................................23
General Instrucons Installer Qualicaons
DO NOT
Do not install the V94i, V94Xi, V75i, or the V65i
outdoors.
Do not install the V94e, V75e, or the V65e indoors.
Do not install the appliance in an area where water
leakage of the unit or connecons will result in
damage to the area adjacent to the appliance or to
lower oors of the structure. When such locaons
cannot be avoided, it is recommended that a
suitable drain pan, adequately drained, be installed
under the appliance. The pan must not restrict
combuson air ow.
Do not obstruct the ow of combuson and
venlaon air. Combuson air shall not be
supplied from occupied spaces.
Do not use this appliance in an applicaon such as
a pool or spa heater that uses chemically treated
water . (This appliance is suitable for lling large or
whirlpool spa tubs with potable water.)
Do not use substute parts that are not authorized
for this appliance.
MUST DO
The installaon must conform with local codes or,
in the absence of local codes, with the Naonal
Fuel Gas Code, ANSI Z223.1/NFPA 54, or the
Natural Gas and Propane Installaon Code, CSA
B149.1. If installed in a manufactured home, the
installaon must conform with the Manufactured
Home Construcon and Safety Standard, Title 24
CFR, Part 3280 and/or CAN/SCA Z240 MH Series,
Mobile Homes.
The appliance, when installed, must be electrically
grounded in accordance with local codes or, in the
absence of local codes, with the Naonal Electrical
Code, ANSI/NFPA 70 Canadian Electrical , or the
Code, CSA C22.1.
The appliance and its appliance main gas valve
must be disconnected from the gas supply piping
system during any pressure tesng of that system
at test pressures in excess of 1/2 psi (3.5 kPa)
(13.84 in W.C.).
Type of installaon
For installaon in residenal applicaons.
Cered for installaon in manufactured (mobile)
homes.
Value Series Manual 5
Prepare for Installaon
Parts included
Tools needed
Materials needed
You must follow the installaon instrucons and
those in Care and Maintenance for adequate
combuson air intake and exhaust.
INFORMATION
If a water heater is installed in a closed water
supply system, such as one having a backow
preventer in the cold water supply line, means
shall be provided to control thermal expansion.
Contact the water supplier or local plumbing
inspector on how to control thermal expansion.
Should overheang occur or the gas supply fail to
shut o, turn o the manual gas control valve to
the appliance.
Keep the air intake locaon free of chemicals such
as chlorine or bleach that produce fumes. These
fumes can damage components and reduce the life
of your appliance.
Tankless water heater
MC-91-2 temperature controller (integrated into
indoor models; provided with outdoor models)
Pipe wrenches (2)
Adjustable pliers
Screwdrivers (2)
Wire cuers
Gloves
Safety glasses
Level
Tools that might be needed
Hammer drill with
concrete bits
Saw
Threading machine with
heads and oiler
Core drill with diamond
head
Torch set
Copper tubing cuer
Steel pipe cuer
Materials that may be needed
Soap or gas leak
detector soluon
Approved venng
Teon tape
(recommended) or pipe
compound
Pressure relief valve
Heat tape
Pipe insulaon
Electrical wire and
conduit per local code
Concrete wall anchors
Oponal pipe cover
Oponal temperature
controller
5/8” ID PVC exible
tubing
2 conductor 22 AWG
wire for controller
Single gang electrical
box
Wire nuts
Unions, drain valves,
isolaon valves
6 Value Series Manual
Environment
Air surrounding the water heater, venng, and vent
terminaon(s) is used for combuson and must be free
of any compounds that cause corrosion of internal
components. These include corrosive compounds that
are found in aerosol sprays, detergents, bleaches,
cleaning solvents, oil based paints/ varnishes, and
refrigerants. The air in beauty shops, dry cleaning
stores, photo processing labs, and storage areas for pool
supplies oen contains these compounds. Therefore it
is recommended that outdoor models be used for these
locaons where possible.
The water heater, venng, and vent terminaon(s)
should not be installed in any areas where the air may
contain these corrosive compounds. If it is necessary for
a water heater to be located in areas which may contain
corrosive compounds, the following instrucons are
strongly recommended.
IMPORTANT CONSIDERATIONS FOR:
Indoor/Internal Water Heaters
DO NOT Install in areas where air for combuson
can be contaminated with chemicals.
Before installaon, consider where air has the
ability to travel within the building to the water
heater.
Where possible, install the water heater in a sealed
closet so that it is protected from the potenal of
contaminated indoor air.
Chemicals that are corrosive in nature should not
be stored or used near the water heater.
Outdoor/External Water Heaters and Vent
Terminaons of Indoor/Internal Water Heaters
Install the water heater as far away as possible
from exhaust vent hoods.
Install as far away as possible from air inlet vents.
Corrosive fumes may be released through these
vents when air is not being brought in through
them.
Chemicals that are corrosive in nature should not
be stored or used near the water heater or vent
terminaon.
Damage and repair due to corrosive compounds in the
air is not covered by warranty.
Consideraon of care for your water heater should
include evaluaon of water quality.
The water must be potable, free of corrosive chemicals,
sand, dirt, or other contaminates. It is up to the
installer to ensure the water does not contain corrosive
chemicals, or elements that can aect or damage the
heat exchanger. Water that contains chemicals
exceeding the levels below aect and damage the heat
exchanger. Replacement of the heat exchanger due to
water quality damage is not covered by the warranty.
Maximum Level
Total Hardness Up to 200 mg / L
Aluminum * Up to 0.2 mg / L
Chlorides * Up to 250 mg / L
Copper * Up to 1.0 mg / L
Dissolved Carbon Dioxide (CO2) Up to 15.0 mg / L or PPM
Iron * Up to 0.3 mg / L
Manganese * Up to 0.05 mg / L
pH * 6.5 to 8.5
TDS (Total Dissolved Solids) * Up to 500 mg / L
Zinc * Up to 5 mg / L
Determine Installaon Locaon
Water Quality
* Source: Part 143 Naonal Secondary Drinking Water
Regulaons
If you install this water heater in an area that is known
to have hard water or that causes scale build up the -
water must be treated and/or the heat exchanger
ushed regularly.
When scale build-up in the heat exchanger begins to
aect the performance of the water heater, a diagnosc
code LC# will display. Flush the heat exchanger to
prevent damage to it. Scale build up is caused by hard
water set at a high temperature.
Rinnai oers Southeastern Filtraon ScaleCuer s
Water Condioning System that oers superior lime
scale prevenon and corrosion control by feeding a
blend of control compounds into the cold water
supply.
You must ensure that clearances will be met and that
the vent length will be within required limits. Consider
the installaon environment, water quality, and need
for freeze protecon. Requirements for the gas line,
water lines, electrical connecon, and condensate
disposal can be found in their respecve installaon
secons of this manual.
Part Number Descripon
103000038 Southeastern Filtratrion
ScaleCuer System Feed3/4”
103000039 ScaleCuer Rell
Value Series Manual 7
[1] A vent shall not terminate directly above a sidewalk or paved driveway
that is located between two single family dwellings and serves both
dwellings.
[2] Permied only if veranda, porch, deck, or balcony is fully open on a
minimum of two sides beneath the oor.
For clearances not specied in , clearances are in ANSI Z223.1/NFPA 54
accordance with local installaon codes and the requirements of the gas
supplier.
Clearance to opposite wall is 24 inches (60 cm).
For indoor models, you must install a vent terminaon to bring in combuson air and expel exhaust.
Direct Vent (Indoor Unit) Other than direct vent (Outdoor unit)
Ref Descripon Canadian Installaons (CSA
B149.1)
US Installaons
(ANSI Z223.1 / NFPA 54)
Canadian Installaons
(CSA B149.1)
US Installaons
(ANSI Z223.1 / NFPA 54)
A Clearance above grade, veranda, porch, deck, or
balcony 12 inches (30 cm) 12 inches (30 cm) 12 inches (30 cm) 12 inches (30 cm)
B Clearance to window or door that may be opened 36 inches (91 cm) 12 inches (30 cm)
6 in (15 cm) for appliances
10,000 Btuh (3 kW), 12 in (30
cm) for appliances > 10,000 Btuh
(3 kW) and Btuh (30 ≤ 100,000
kW), 36 in (91 cm) for appliances
4  (1.2 m) below or to side
of opening; 1  (300 mm)
above opening
C Clearance to permanently closed window * * * *
D
Vercal clearance to venlated sot, located
above the terminal within a horizontal distance of
2 feet (61 cm) from the center line of the terminal
* * * *
E Clearance to unvenlated sot * * * *
F Clearance to outside corner * * * *
G Clearance to inside corner * * * *
H Clearance to each side of center line extended * * * *
I Clearance to service regulator vent outlet
Above a regulator within 3 
(91cm) horizontally of the
vercal center line of the
regulator vent outlet to a
maximum vercal distance of 15
 (4.5 m)
*
Above a regulator within 3 
(91cm) horizontally of the
vercal center line of the
regulator vent outlet to a
maximum vercal distance of 15
 (4.5 m)
*
J
Clearance to nonmechanical air supply inlet to
building or the combuson air inlet to any other
appliance
36 inches (91 cm) 12 inches (30 cm)
6 in (15 cm) for appliances
10,000 Btuh (3 kW), 12 in (30
cm) for appliances > 10,000 Btuh
(3 kW) and Btuh (30 ≤ 100,000
kW), 36 in (91 cm) for appliances
4  (1.2 m) below or to side
of opening; 1  (300 mm)
above opening
K Clearance to a mechanical air supply inlet 6  (1.83 m)
3  (91 cm) above if
within 10  (3 m)
horizontally
6  (1.83 m) 3  (91 cm) above if within
10  (3 m) horizontally
L Clearance above paved sidewalk or paved 7  (2.13 m) [1] * 7  (2.13 m) [1] 7  (2.13 m)
M Clearance under veranda, porch, deck, or balcony 12 inches (30 cm) [2] * 12 inches (30 cm) [2] *
Terminal Clearances
AIR SUPPLY INLET
VENT TERMINAL
AREA WHERE TERMINAL IS NOT PERMITTTED
X
V
SNOW
TERMINATION
Clearance in
Ref. also A
applies to
anticipated
snow line
10 Value Series Manual
Unit clearances
* 0 inches from vent components and condensate
drain line.
The clearance for servicing is 24 inches in front of the
water heater.
For closet installaon, clearance is 6 inches (152 mm)
from the front.
Indoor models: V94i, V94Xi, V75i, V65i Outdoor models: V94e, V75e, V65e
The clearance for servicing is 24 inches in front of the
water heater.
to Combusbles
inches (mm)
to Non-
Combusbles
inches (mm)
Top of Heater 12 (305) 2 (51)
Back of Heater 0 (zero) 0 (zero)
Front (Panel) 24 (610) 0 (zero)
Front (Exhaust) 24 (610) 24 (610)
Sides of Heater 6 (152) 1/8 (3.2)
Ground/Boom 12 (305) 2 (51)
to Combusbles
inches (mm)
to Non-
Combusbles
inches (mm)
Top of Heater 6 * (152) 2 *(51)
Back of Heater 0 (zero) 0 (zero)
Front of Heater 6 (152) 6 (152)
Sides of Heater 2 (51) 1/2 (13)
Ground/Boom 12 (305) 12 (305)
Vent 0 (zero) 0 (zero)
to side
to front
to top
to ground/b tot om
to side
to front
to top
to ground/b tot om
12 Value Series Manual
Mount to Wall
wall installaon
brackets
Checklist to Determine Installaon
Locaon
The water heater is not exposed to corrosive
compounds in the air.
The water heater locaon complies with the
clearances.
For indoor models, the planned venng will not
exceed the maximum length for the number of
elbows used.
The planned venng terminaon/air intake
locaon meets the clearances.
The water supply does not contain chemicals or
exceed total hardness that will damage the heat
exchanger.
A standard 3 prong 120 VAC, 60 Hz properly
grounded wall outlet (for indoor models) or other
120 VAC, 60 Hz source is available.
The installaon must conform with local codes or,
in the absence of local codes, with the Naonal
Fuel Gas Code, ANSI Z223.1/NFPA 54, or the
Natural Gas and Propane Installaon Code, CSA
B149.1. If installed in a manufactured home, the
installaon must conform with the Manufactured
Home Construcon and Safety Standard, Title 24
CFR, Part 3280 and/or CAN/SCA Z240 MH Series,
Mobile Homes.
Leave the enre manual taped to the water
heater (indoor models), temperature controller
(outdoor models), or give the enre manual
directly to the consumer.
1. Idenfy the installaon locaon and conrm that
the installaon will meet all required clearances.
2. Securely aach the water heater to the wall
using any of the holes in the wall installaon
brackets which are at the top and boom of the
water heater. Ensure that the aachment
strength is sucient to support the weight.
Refer to the weight of the water heater in the
Specicaons secon.
Use a leveling tool to ensure that the water
heater is level. Proper operaon requires that
the water heater be level.
NOTE: The water heater should be installed in an
upright posion. Do not install upside down or on its
side.
Remove the Front Panel
Slide the plasc trim pieces on each side of the water
heater to expose the screws.
Remove the 4 screws and pull o the front panel.
Value Series Manual 13
Manufacturer Listed and Tested Vent Products
for V94i, V94Xi, V75i and V65i Telephone Fax Contact
Ubbink Rolux Vent System www.rinnai.us 800-621-9419 678-829-1666
Heat Fab Saf T Vent SC system- - 800-772-0739 413-863-4803 custsvc@heat fab.com, -
www.heaab.com
Metal Fab Corr/Guard Vent/Air Intake System- 800-835-2830 316-943-2717 info@mtlfab.com,
www.metal fabinc.com-
Installaon of Venng (indoor models only)
Install the correct venng for your model according to the venng manufacturers instrucons and the
guidelines below.
Refer to the manufacturer s technical literature for specic part numbers and instrucons.
Venng Guidelines
DO NOT
Do not use PVC, CPVC, ABS or galvanized material
to vent this appliance.
Do not combine vent components from dierent
manufacturers.
Vent diameter must not be reduced.
Do not connect the venng system with an
exisng vent or chimney.
Do not common vent with the vent pipe of any
other water heater or appliance.
MUST DO
This water heater is a direct vent water heater and
therefore is cered and listed with the vent
system. You must use vent components that are
cered and listed with the water heater model.
The vent system must vent directly to the outside
of the building and use outside air for combuson.
Avoid dips or sags in horizontal vent runs by
installing supports per the vent manufacturers
instrucons.
Support horizontal vent runs every four feet and
all vercal vent runs every six feet or in
accordance with local codes.
Venng should be as direct as possible with a
minimum number of pipe ngs.
Vent connecons must be rmly pressed together
so that the gaskets form an air ght seal.
The vent piece connected to the water heater
must be secured with one self tapping screw.-
INFORMATION
Refer to the instrucons of the vent system
manufacturer for component assembly
instrucons.
If the vent system is to be enclosed, it is suggested
that the design of the enclosure shall permit
inspecon of the vent system. The design of such
enclosure shall be deemed acceptable by the
installer or the local inspector.
NOTICE
If it becomes necessary to access an enclosed vent
system for service or repairs, Rinnai is not responsible
for any costs or dicules in accessing the vent
system. The warranty does not cover obtaining
access to a vent system in an enclosed environment.
Value Series Manual 15
Condensate
(indoor models only)
Condensate formaon can occur in high eciency
direct vent appliances. Without proper drainage
condensate will damage the heat exchanger.
To prevent condensate damage follow these
instrucons.
DO NOT
Do not allow condensate to enter the water
heater.
Do not connect the condensate drain pipe directly
to the rain sewer.
Do not connect the condensate drain line with an
air condioning evaporator coil drain.
MUST DO
Use only vent that is approved and idened as
acceptable for your parcular model.
For vercal terminaons, install a condensate drain
and trap as close as possible to the appliance.
Slope the venng toward the appliance according
to the vent manufacturers installaon instrucons.
All condensate must drain and be disposed of
according to local codes.
Use only corrosion resistant materials for the
condensate drain lines such as PVC pipe or plasc
hose.
The condensate drain pipe (along its enre length)
must be at least the same diameter as the drain
line, (5/8 inch NPT).
The end of the condensate drain pipe should be
open to the atmosphere. The end should not be
under water or other substances.
To minimize freezing of the condensate, run the
condensate drain line through an interior wall or
between insulaon and an interior wall.
The condensate collector should be used for all
hydronic heang applicaons.
Checklist for Venng and
Condensate (indoor models only)
Verify proper clearances around the vents and air
intakes.
Ensure you have used the correct venng
products for the model installed and that you
have completely followed the venng
manufacturer s installaon instrucons and these
installaon instrucons.
Verify that the vent pipe has a downward slope or
grade to the outside of 1/4 inch per foot (1.2 ) °
OR if the vent pipe is sloped toward the water
heater (as some local codes require), that a
condensate collector is installed to allow
condensaon to drain away from the water
heater to a proper drain source.
Verify that condensate will not be allowed to
drain back into the water heater.
Verify that the vent system does not exceed the
maximum length for the number of elbows used.
INFORMATION
A condensate trap is available, P/N 222053.
Regions of cold climate will create more
condensate in the vent system. The condensate
collector should be used in cold climates.
The condensate drain pipe should be as short as
possible and have a downward pitch.
16 Value Series Manual
Installaon of Plumbing
A manual water control valve must be placed in the
water inlet connecon to the water heater before it is
connected to the water line. Unions may be used on
both the hot and cold water lines for future servicing
and disconnecon of the unit.
DO NOT
Do not introduce toxic chemicals such as those
used for boiler water treatment to the potable
water used for space heang.
MUST DO
The piping (including soldering materials) and
components connected to this appliance must be
approved for use in potable water systems.
Purge the water line to remove all debris and air.
Debris will damage the water heater.
If the appliance will be used as a potable water
source, it must not be connected to a system that
was previously used with a nonpotable water
heang appliance.
Ensure that the water lter on the water heater is
clean and installed.
Piping Requirements
Pressure Relief Valve Requirements
Install the pressure relief valve according to local
plumbing codes and these instrucons.
An approved pressure relief valve is required by the
American Naonal Standard (ANSI Z21.10.3) for all
water heang systems, and shall be accessible for
servicing.
DO NOT
Do not plug the relief valve and do not install any
reducing ngs or other restricons in the relief
line. The relief line should allow for complete
drainage of the valve and the line.
Do not place any other type valve or shut o
device between the relief valve and the water
heater.
MUST DO
The relief valve must comply with the standard for
Relief Valves and Automac Gas ShutoDevices for
Hot Water Supply Systems ANSI Z21.22 and /or the
standard Temperature, Pressure, Temperature and
Pressure Relief Valves and Vacuum Relief Valves,
CAN1 4.4-.
The relief valve must be rated up to 150 psi and to
at least the maximum BTU/hr of the appliance.
The discharge from the pressure relief valve should
be piped to the ground or into a drain system per
local codes.
The pressure relief valve must be manually
operated once a year to check for correct
operaon.
The relief valve should be added to the hot water
outlet line and near the hot water outlet according
to the manufacturers instrucons. DO NOT place
any other type valve or shut o device between
the relief valve and the water heater.
INFORMATION
If a relief valve discharges periodically, this may be
due to thermal expansion in a closed water supply
system. Contact the water supplier or local
plumbing inspector on how to correct this
situaon. Do not plug the relief valve.
The American Naonal Standard (ANSI Z21.10.3)
does not require a combinaon temperature and
pressure relief valve for this appliance. However,
local codes may require a combinaon
temperature and pressure relief valve.
Isolaon Valves
Rinnai strongly recommends the installaon of
isolaon valves on the cold and hot water lines
because they provide the ability to isolate the water
heater from the structure s plumbing and allow quick
access to ush the heat exchanger. Flushing the heat
exchanger regularly is required as part of the proper
maintenance for this water heater.
Water discharged from the pressure relief valve could
cause severe burns instantly or death from scalds.
WARNING
Value Series Manual 17
Piping Diagram for Basic Installaon
GasSup
ply
3/4"C
oldWat
e
rSupply
Line
3/4" Hot Water Supp Lily ne
W er He erat at
3/4"G
asConne
ction
For Building Fixtures
Pressure Relief Valve
3/4" Ball Valve
3/4" Union
Check Valve
S
Pressure Regulator
Circulating Pump
Solenoid Valve
Boiler Drain Valve
KEY This is not an engineered drawing. It is intended only as a guide and not
as a replacement for professionally engineered project drawings. This
drawing is not intended to describe a complete system. It is up to the
contractor/engineer to determine the necessary components and
configuration of the particular system being installed. This drawing does
not imply compliance with local building code requirements. It is the
responsibility of the contractor/engineer to ensure installation is in
accordance with all local building codes. Confer with local building
officials before installation.

Produktspecifikationer

Varumärke: Rinnai
Kategori: Pannor & pannor
Modell: V94iP

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