Rinnai RHFE-431FA Quick start guide

Owner’s Operation and Installation Manual
RHFE-431FAⅢ
ENERGYSAVER
GAS DIRECT VENT WALL FURNACE
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
This appliance may be installed in an aftermarket, permanently
located, manufactured home (USA) or mobile home, where not
prohibited by local codes.
This appliance is only for use with the type of gas indicated on
the rating plate. This appliance is not convertible for use with
other gases, unless a certified kit is used.
─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 qualified
installer, service agency or the gas supplier.
WARNING: If the information in these instructions are not
followed exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
HOME OWNER / INSTALLER
FOR YOUR SAFETY
THIS MANUAL MUST BE READ IN ITS
ENTIRETY BEFORE OPERATING HEATER
Register your product at www.rinnairegistration.com or
call 1-866-RINNAI1 (746-6241)

WARNING
IMPROPER INSTALLATION, ADJUSTMENT, ALTERATION,
SERVICE OR MAINTENANCE CAN CAUSE PROPERTY
DAMAGE, PERSONAL INJURY OR LOSS OF LIFE, REFER
TO THE OWNER'S INFORMATION MANUAL PROVIDED
WITH THIS APPLIANCE. INSTALLATION AND SERVICE
MUST BE PERFORMED BY A QUALIFIED INSTALLER,
SERVICE AGENCY OR THE GAS SUPPLIER.
ENERGYSAVER RHFE-431FA
Operation Manual
Table of Contents
Page
FEATURES OF THE RHFE-431FA UNITS ........................................................1
SAFETY DEVICES ................................................................................................1
IMPORTANT POINTS / USAGE AND INSTALLATION MUSTS ............................3
DIMENSIONS ........................................................................................................5
SPECIFICATIONS .................................................................................................6
SAFETY POINTS ..................................................................................................8
GETTING TO KNOW YOUR NEW RHFE-431FA ..............................................10
CONTROL PANEL .................................................................................................11
CUT-AWAY DIAGRAM ...........................................................................................12
NOTICE BEFORE INSTALLATION .......................................................................13
INSTALLATION INSTRUCTIONS ..........................................................................14
GAS CONNECTION ..............................................................................................15
VENT LOCATION ..................................................................................................16
FITTING TOP SPACER + WALL CLIP ..................................................................16
VENT TERMINATION CLEARANCES ..................................................................17
LOCATION / CLEARANCES .................................................................................18
SLEEVE AND MANIFOLD INSTALLATION ...........................................................20
FITTING UNIT .......................................................................................................22
OPERATING INSTRUCTION LABEL ....................................................................24
ADDITIONAL CUSTOMER OPERATING INFORMATION ....................................25
TESTING ...............................................................................................................32
CHECK ..................................................................................................................32
PRE-SERVICE CHECK .........................................................................................33
TROUBLE SHOOTING ..........................................................................................34
MAINTENANCE / SERVICE ..................................................................................35
CONSUMER SUPPORT ........................................................................................37
SCHEMATIC DIAGRAM ........................................................................................39
PARTS LIST ...........................................................................................................44
RHFE-431FA FLOW DIAGRAM .........................................................................50
EXTENDED FLUE PIPE KIT .................................................................................51
TECHNICAL DATA ................................................................................................56

FEATURES OF THE RHFE-431FA UNITS
SAFETY DEVICES
– 1 –
◆Clean Heating Forced Flue Type
◆Easy Operation One-Touch Ignition
◆Sensible Temperature Control Feature
◆Comfortable Room Temperature Control and Display
◆Warm Air Outlet at Floor Level (Keeps Your Feet Warm)
◆Child Safety Lock
◆Room Temperature Setting Memory
◆Dirty Air Filter Indicator Lamp
◆Energy-Saving Economy Setting
◆Humidifier Tray
◆Air Flow Directional Louvers
◆Direct Vent Easily Installed
◆Proportional Heating Variable Capacity
◆Hush! Quiet Operation
◆Modern Design Minimizes Floor Space Requirements
◆Failure Message Display
Spark Safety Device: Automatically shuts unit down when there is an abnormal spark at time
of ignition. Display lamps “LOW”, “60”, and “64”will activate if this
happens.
Flame Failure Device: Activated when burner flame fails, indicator lamp “ON”flashes. If
burner fails to ignite, indicator lamp “60”flashes. This prevents raw
gas from being released.
Overheat Switch: This device automatically cuts the gas off if the heater exceeds a
predetermined temperature. This is normally caused by an
obstruction in front of the louvers, or a blocked fan filter. Indicator
lamp “68”“ON”and the “FILTER”indicator lamp flash when overheat
switch is activated.
Two Fusible Links: Backs up the overheat switch. If the fusible link cuts the unit off, a
service call by an authorized person is required to replace the link.
Indicator lamps “68”, “FILTER”and “ON”will flash.

–2 –
Overcurrent Prevention Device: This is a 3 amp. glass fuse found on P.C. board. Design to
shut unit down in case of overcurrent. If fuse blows all
indicator lamps will be “OFF”.
Power Outage Safety Device: This safety device cuts off gas passage and stops
operation.
Local and state codes must be adhered to prior to installation.
Rinnai is continually updating and improving products therefore specifications are subject to change
without prior notice.
Thank you for purchasing Rinnai gas forced flue heater.
Before using this product, please read this manual carefully to insure proper use of the product.
Please read the attached warranty thoroughly and keep it in a safe place.
GENERAL INFORMATION
THIS SERIES HEATER IS DESIGN CERTIFIED BY CSA
INTERNATIONAL AS A DIRECT VENT WALL FURNACE AND
MUST BE INSTALLED ACCORDING TO THESE INSTRUCTIONS.
ALTERATION OF THE ORIGINAL DESIGN INSTALLED OTHER
THAN AS SHOWN IN THESE INSTRUCTIONS OR USED WITH
A TYPE OF GAS NOT SHOWN ON THE RATING PLATE, IS
THE RESPONSIBILITY OF THE PERSON AND COMPANY
MARKING THE CHANGE.
※See conversion for setting gas pressures.
*There are two 1/8" NPT test points for measuring differential pressure, one is located on the modulating
gas valve, the other is located on the burner manifold. The minimum inlet gas supply pressure is for
the purposes of input adjustment.
Minimum supply gas pressure
Maximum supply gas pressure
Manifold test pressure
NG
3.5" (89mmH2O)
10.5" (267mmH2O)
Factory set
LPG
8" (203mmH2O)
13.0" (330mmH2O)
Factory set

IMPORTANT POINTS / USAGE AND INSTALLATION MUSTS
–3 –
Unpack heater and check for damage. (DO NOT INSTALL DAMAGED HEATER.) If heater is
damaged, contact your supplier for advise. Before installing a heater, check the label for the correct gas
type (see label on heater). Refer to local gas authority for confirmation of gas type if you are in doubt.
Included in Carton:
Customers Operating Information
IMPORTANT
Before using this product, please read this manual carefully to insure proper use of product.
1. The installation must conform with local codes or, in absence of local codes, the National Fuel Gas
Code, ANSI Z223.1 or the Canadian Installation Code, CAN/CGA-B149.
2. For information on gas type, see data plate on the appliance.
3. This heater must not be installed where curtains or other combustible materials could come into
contact with it. In some cases curtains may need restraining.
4. This appliance is not designed to be built in.
5. If you move, check the gas type in the area where you are moving to. The local gas authority will be
able to advise on local regulations.
6. This heater discharges a large volume of warm air at low level to provide even heat distribution. If
the air in the room contains cooking vapor or cigarette smoke, and the heater is used on a carpet,
the surface of the carpet may become discolored. In addition, some nylon carpets contain dyes
which may be affected by the warm air flow. Some soft vinyl surfaces are also subject to distortion,
or discoloration by warm air. To prevent discoloration of carpets, etc., a mat should be placed under
the appliance, extending about 30" (750mm) in front of it.
Diagram shows minimum
clearances from combustible
materials.
7. Read these rules and the instructions carefully. Check all local codes. Failure to follow these could
cause a malfunction of the heater resulting in death, serious bodily injury and/or property damage.
8. This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not
convertible for use with other gases, unless a certified kit is used.
If a conversion of the unit is needed, conversions must be performed at Rinnai America or
anthorized agent at owner's expense.
9. WARNING: Any change to this heater or its controls can be dangerous.
10.If a gas leak is suspected, turn heater off, turn gas supply valve off at appliance connector valve.
Open windows to ventilate area immediately and contact your dealer or gas company.
11 .DO NOT PLACE CLOTHING OR FLAMMABLE MATERIALS, GASOLINE AND OTHER
FLAMMABLE VAPORS AND LIQUIDS, ON OR NEAR THE HEATER.
10"
0"
2"
2"
40"

– 4 –
12. YOUNG CHILDREN SHOULD BE CAREFULLY SUPERVISED WHEN THEY ARE IN THE SAME
ROOM WITH THE HEATER.
13. LPG containers must not be installed indoors.
14. Do not use this room heater if any part has been under water. Immediately call a qualified service
technician to inspect the room heater and to replace any part of the control system and any gas
control which has been under water.
15. Adequate clearances for accessibility for purposes of servicing and proper operation should be
provided.
16. Adequate clearances around air openings should be provided.
17. Do not install in areas where curtains, drapes, clothing, or other moving flammables are within 12
inches of this unit.
18. Periodic examination of the venting system is required.
19. The flow of combustion and ventilation air should not be obstructed.
20. A manufactured home (USA only) or mobile home OEM installation must conform with the
Manufactured Home Construction and Safety Standard, Title 24CFR, Part 3280, or, when such a
standard is not applicable, the Standard for Manufactured Home Installations, ANSI Z225.1 or
Standard for Gas Equipped Recreational Vehicles and Mobile Housing, CSA Z240.4.
21. "This appliance must be installed in accordance with the current standard CSA Z240.4 GAS
EQUIPPED RECREATIONAL VEHICLES AND MOBILE HOUSING. Cet appareil doit ette installe
conformement aux, exigences de la norme Z240.4 en vigeuer de l’ACNOR, Installations de gaz dans
les constructions mobiles et vehicules recreatifs."
22. If a blockage occurs at vent terminal due to snow, leaves or other type of obstruction the unit will
stop working. The unit will not function until blockage has been removed then if unit fails to operate,
contact a qualified service agency.
23. For a manufactured home (USA only) or mobile home OEM or residential or light commercial installation,this
unit has been designed and certified to be converted from natural gas to propane or vice-versa. When
provisions are being made to convert this unit, a certified conversion kit must be used. You must also
readjust manifold gas pressure to specifications indicated in the conversion manual. If in doubt, contact
Rinnai America for assistance.

DIMENSIONS
–5 –

21 13/16" (554mm)
19 15/16" (506mm)
8 7/16"(214mm)
Power supply cable
29 1/2" (750mm)
8 9/16"
(217mm)
9 5/8"
(245mm)
Exhaust at rear of unit
3 7/16" (88mm)
11 " (280mm)
R8.0"
(R206mm)
R11"
(R279mm)
1"
(25mm)
3"
18"
Gas Inlet
3 3/8" (85mm)
6 1/2" (165mm)


SPECIFICATIONS
–6 –
MODEL
RHFE-431FA -P
PROPANE
BTU/h MIN. CLEARANCES
INPUT OUTPUT SIDE TOP
LO:110.5
HI:141.3
LO:110.5
HI:141.3
FRONT
2"
(50mm)
10"
(250mm)
40"
(1m)
40"
(1m)
FAN CFM
OUTPUT
10"
(250mm)
2"
(50mm)
Low
8,200
Low
6,640
High
13,530
Low
6,640
High
13,530
High
16,700
Low
8,200
High
16,700
SPECIFICATIONS
Type of Appliance Fan forced flued gas furnace
Model RHFE-431FA ENERGYSAVER
Width (750mm) 29 1/2"
Dimensions Depth (250mm with back spacer)9 13/16" (with back spacer)
Height (554mm) 21 13/16"
Weight Approx. 51 lbs.
Connections Electrical AC 120V 60Hz 40 watts
Gas 1/2" female NPT
Combustion System Stainless steel bunsen burner
Ignition System Continuous spark
Operation Finger touch control buttons (non-lock)
Temperature Control Electronic thermostat HI-LOW/OFF
Up/down switch
Temperature Range Modulates Continuous
LOW 55°F 60°F 80°F HI High Combustion
Warm Air Outlet Bottom front louver
Indicators/Lamps Burner ON, child lock, filter, economy, temperature display (8)
Operating Buttons On, Up/down, child-lock, economy
Economy Mode Energy saving feature
Humidifier Tray Capacity 3 pints (1300cc)
RHFE-431FA -N
NATURAL

–7 –
Safety Devices
Noise Level Range HI LOW 38 32dB(A)
TYPE
SPECIFICATIONS FOR VENT SIZES
S Thin Walls Mobile Home
Wood Walls
Wood/Brick
Brick/Block
Special
3"4 1/2"
(75 115)mm
4 1/2"9 1/2"
(115 240 )mm
9 1/2"15 3/4"
(240 400 )mm
15 3/4"23 5/8"
(400 600 )mm
23 5/8"31 1/2"
(600 800 )mm
A
B
C
D
(80mm) 3 1/8"
(4m, 2 bends) 13ft., 2 bends
Combustion Method
Air Supply Exhaust
Radiation Method
Forced combustion
Closed Type
Forced convection
Wall Penetration
Hole
Max. Extended
AIR SUPPLY/
EXHAUST PIPE
Flame failure –Flame rod
Over heat –Bi-metal switch, thermal fuse, thermistor
Power failure –PCB
Power surge –3 Amp. fuse
Fan delay –Micro computer timer
Pre-purge –Combustion fan, pre-purge timer, spark sensor
Room over heat –Automatic cut off at 104°F after 10 minutes
** BTU - Efficiency increase with vent size. Clearances from combustibles see pages 3 and 19.
** Thermal efficiency rating determined under continuous operating conditions, and was determined
independently of any installed system.

SAFETY POINTS
–8 –
Do not restrict the warm air discharge by
placing articles in front of the heater.
This appliance must not be used for any
purpose other than heating.
Do not install the heater in an unusually
dusty area.
Do not allow anyone to sit on or lean against
the appliance.
Do not spray aerosols while the heater is
operating. Most aerosols contain butane
gas, and can be a fire hazard if used near
this heater when it is in use.
Do not allow curtains or other flammable or
combustible materials to come into contact
with the heater.
Combustible materials must not be placed
where the heater could ignite them.

–9 –
SAFETY POINTS
Keep flammable materials, trees, shrubs,
etc., away from the flue terminal.
Do not allow anyone to poke articles
through the louvers.
Young children should be supervised at all
times. Hand or body contact with the
louvers should be avoided.
Do not allow young children or an infant to
sleep directly in front of the heater.
Filter should be cleaned at regular intervals.
See page 30.
Do not place articles containing liquids on
top of the heater. Liquids spilled on the
controls may cause extensive damage.
Clean with vacuum cleaner, weekly.
LPGAS
GAS
Gasoline

VENT TERMINAL
COMBUSTION/
EXHAUST
GETTING TO KNOW YOUR NEW RHFE-431FA
–10 –
WARM AIR OUTLET
HUMIDIFIER
REMOVE BOTTOM
COVER AND PULL
OUT TO REFILL
BOTTOM COVER
HOLD BOTH SIDES
AND PULL TOWARD
YOU
THERMISTOR
GAS CONNECTIONS
1/2" NPT
POWER CORD
PLUG 120V AC
COMBUSTION AIR
INTAKE HOSE
EXHAUST PIPE
AIR FILTER
DISPLAY
TEMPERATURE
SETTING CONTROLS
ON/OFF SWITCH
TURNS MAIN POWER
ON/OFF
RATING PLATE
MODEL NUMBER,
SERIAL NUMBER,
GAS TYPE, ETC.
TERMINAL BLOCK
FOR COMBUSTION FAN

CONTROL PANEL
–11 –
CHILD SAFETY
LOCK
Lamp is "green"
when this feature
is on.
TEMPERATURE
DISPLAY
Set temperature
lamp stays on.
Current room
temperature flashes.
FILTER LAMP
Flashes when filter
is dirty.
OPERATION LAMP
This lamp turns
"green" when power
is on. Lamp will
change to "red"
when burner is on.
TEMPERATURE
BUTTONS
adjust temp. to
lower setting.
adjust temp. to
a higher setting.
ENERGY SAVING
BUTTON
Lamp is green
when this feature is
activated.
ON/OFF BUTTON
Easy operation
One touch ignition
ALL BUTTONS BEEP WHEN OPERATED.
Child Lock
LO 60 64 68 72 76 80 HI
Temperature
Control
Economy
Filter
ON
ON/OFF

–12 –
CUT-AWAY DIAGRAM

–13 –
NOTICE BEFORE INSTALLATION
The heater must be installed by a qualified service
person according to this installation instruction.
Check your local building codes for the proper method
of installation. In the case of absence of local codes,
this heater should be installed in accordance with the
National Fuel Gas Code ANSI Z223 1.
Check local codes or, in the absence of local codes,
the current CAN/CGA B149 INSTALLATION
CODE.
DUE TO HIGH TEMPERATURES, THE
APPLIANCE SHOULD BE LOCATED OUT OF
TRAFFIC AND AWAY FROM FURNITURE AND
DRAPERIES.
CHILDREN AND ADULTS SHOULD BE ALERTED
TO THE HAZARDS OF HIGH SURFACE
TEMPERATURES AND SHOULD STAY AWAY TO
AVOID BURNS OR CLOTHING IGNITION.
“WARNING” Do not operate appliance with the
panel(s) removed, cracked or broken. Replacement
of the panel(s) should be done by a licensed or
qualified service person.
INSTALLATION AND REPAIR SHOULD BE DONE
BY A QUALIFIED SERVICE PERSON. THE
APPLIANCE SHOULD BE INSPECTED BEFORE
USE AND AT LEAST ANNUALLY BY A QUALIFIED
SERVICE PERSON. MORE FREQUENT
CLEANING MAY BE REQUIRED DUE TO
EXCESSIVE LINT FROM CARPETING, BEDDING
MATERIAL, ETC. IT IS IMPERATIVE THAT
CONTROL COMPARTMENTS, BURNERS AND
CIRCULATING AIR PASSAGEWAYS OF THE UNIT
BE KEPT CLEAN.
The appliance, when installed, must be electrically
grounded in accordance with local codes or, in the
absence of local codes, with the National Electrical
Code, ANSI/NFPA 70 or Canadian Electrical Code,
CSA C22.1, if an external electrical source is utilized.
WARNING: THIS APPLIANCE IS EQUIPPED
WITH A THREE PRONG (GROUNDING) PLUG
FOR YOUR PROTECTION AGAINST SHOCK
HAZARD AND SHOULD BE PLUGGED DIRECTLY
INTO A PROPERLY GROUNDED THREE PRONG
RECEPTACLE. Do not cut or remove the grounding
prong from the plug.
This gas appliance must not be connected to a
chimney flue serving a separate solid-fuel burning
appliance.
When the appliance is installed directly on carpeting,
tile or other combustible material other than wood
flooring, the appliance shall be installed on a metal or
wood panel extending the full width and depth of the
appliance.
Rinnai recommends a dedicated electrical circuit.
Appliance input ratings are based on sea level
operation and need not be changed for operation up
to 2,000 feet elevation. For operation at elevations
above 2,000 feet, manufactured to specified deration
conditions for Canada and the United States.

–14 –
INSTALLATION INSTRUCTIONS
Flue Manifold 1
Back Spacer
Set
Flue Locking
Clamp
Flue Lock
Stopper
Insulation
Clip
Hose Clip
Plastic tie
for air inlet
(M4 20)
For Flue Lock Stopper
For Flue Manifold
Wall Bracket Screws
(M4)
(M4.8 32)
Wood Screws
1
1
1
1
2
1
1
3
5
1
1
6
2
Air Filter
(M4)
For Back Spacer Set
For Air Intake Clip
(M4)
Customers operating
information and
Installation Instructions
Spare rubber seal
1
(‘A’Flue units only)
(For weatherboard installations)
Check to ensure gas supply matches that of the appliance.
Refer to local gas authority for confirmation of gas type if in doubt.
Refer to data plate located inside of the front panel.
Check for damage, if the unit is damaged contact your supplier or Rinnai.
Do not install a damaged unit before checking with your supplier.
Refer to an approved pipe sizing chart if in doubt about size of gas line.
Wall Bracket Spacer Bracket11

–15 –
GAS CONNECTION
1. The gas supply line shall be gas tight, sized and so installed as to provide a supply of gas sufficient
to meet the maximum demand of the heater without loss of pressure.
2. A shut off valve (and appliance connector valve) should be installed in the upstream of the gas line
to permit servicing.
3. Flexible pipe and any appliance connector valve used for gas piping shall be types approved by
nationally recognized agencies.
4. Any compound used on the threaded joint of the gas piping shall be a type which resists the action
of liquefied petroleum gas.
5. Supplied gas pressure must be within the limits shown in the specifications.
6. After completion of gas pipe connections, all joints including the heater must be checked for gas
tightness by means of leak detector solution, soap and water, or an equivalent nonflammable
solution, as applicable.
CAUTION: Since some leak test solutions, including soap and water, may cause corrosion or stress
cracking, the piping shall be rinsed with water after testing, unless it has been determined that the
leak test solution is noncorrosive.
7. The appliance and its appliance main gas valve must be disconnected from the gas supply piping
system during any pressure testing of that system at test pressures in excess of 1/2 P.S.I (3.5kPa).
The appliance must be isolated from the gas supply piping system by closing its individual manual
shut off valve during any pressure testing of the gas supply system at test pressures equal to or less
than 1/2 psig.
8. Two 1/8" test plugs are provided for testing of manifold differential pressure. See schematic for
location.
At time of installation installer must supply a 1/8" N.P.T. plugged tapping, accessible for test
manometer connection, immediately up stream of the gas supply connection to the appliance.

–16 –
VENT LOCATION FITTING TOP SPACER + WALL CLIP
FLUE MANIFOLD POSITION
Center of hole for flue manifold can be drilled
anywhere within the shaded area. (To avoid studs,
etc.)
FOR WEATHERBOARD WALLS DRILL THROUGH
CENTER OF WEATHER BOARD FROM OUTSIDE,
THEN DRILL FROM INSIDE THROUGH PLASTER-
BOARD.
Before drilling the flue hole, check for water and gas
pipes as well as electric cables. Use a 3 1/8"
(80mm) drill for hole through wall.
WALL MOUNTING BRACKETS
Place top back spacer in position. Mark the position
of the top edge of the top space on the wall. Move
the heater away from the wall. Mark center lines 1
1/8"(30mm) down from the top edge mark, and 1
9/16"(40mm) in front the left and right hand sides of
the top spacer. Attach wall brackets at the marked
position.
Tighten all screws.
Replace top spacer, clipping the spacer into the wall
brackets at the same time as attaching it to the
heater. Secure top spacer with the screws provided.
THE HEATER IS NOW SECURED TO THE WALL.
Replace fan filter.
SECURE HEATER TO WALL
Flue Hole
3 1/8"
(80mm)
8 7/16"
(214mm)
R11"
(R279mm)
R8.0"
(R206mm)
8 9/16"
(217mm)
11"
(280mm)
Cavity Opening
Spacer bracket
Top spacer
Top spacer
Wall bracket
Spacer bracket
Spacer

–17 –
VENT TERMINATION CLEARANCES
INSIDE
CORNER DETAIL
FIXED
CLOSED
OPERABLE
FIXED
CLOSED
OPERABLE
B
B
B
A
J
BM
C
F
B
B
E
D
L
G
A
H
K
I
X
AIR SUPPLY INLET
V
VENT TERMINAL
AREA WHERE
TERMINAL IS NOT
PERMITTED
REF
DESCRIPTION Canadian InstallationsU.S. Installations
A
B
C
D
E
F
G
H
I
J
K
L
M
1 foot
3 feet above if within 10 feet
horizontally
3 feet within a height 15 feet above
the meter/regulator assembly
*
*
*
*
*
*
*
*
*
1 foot
‡
1 foot
6 feet
†
7 feet
3 feet
*
*
*
*
*
** 6 inches for appliances  10,000
Btuh, 9 inches for appliances ＞
10,000 Btuh and 50,000 Btuh, 12
inches for appliances ＞ 50,000 Btuh
6 inches for appliances  10,000
Btuh, 12 inches for appliances ＞
10,000 Btuh and  100,000 Btuh, 36
inches for appliances ＞ 100,000 Btuh
6 inches for appliances  10,000
Btuh, 12 inches for appliances ＞
10,000 Btuh and  100,000 Btuh, 36
inches for appliances ＞ 100,000 Btuh
** 6 inches for appliances  10,000
Btuh, 9 inches for appliances ＞
10,000 Btuh and  50,000 Btuh, 12
inches for appliances ＞ 50,000 Btuh
Clearance above grade, veranda, porch, deck, or balcony
Clearance to window or door that may be opened
Clearance to permanently closed window
Vertical clearance to ventilated to soffit, eaves, or overhang
Clearance to unventilated soffit , eaves, or overhang
Clearance to outside corner
Clearance to inside corner
Clearance to each side of center line extended above
meter/regulator assembly
Clearance to service regulator vent outlet
Clearance to nonmechanical air supply inlet to building or
the combustion air inlet to any other appliance
Clearance to a forced air inlet into a building
Clearance above paved sidewalk or paved driveway located
on public property
Clearance under deck, veranda, porch, or balcony (open on
3 sides)
* For clearances not specified in ANSI Z223.1 / NFPA 54 or CAN/CGA-B149, use clearances in accordance with local installation codes and the
requirement of the gas supplier.
† A vent shall not terminate directly above a sidewalk or paved driveway that is located between
two single family dwellings and serves both dwellings. 
‡ Permanent only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
** 4 feet for units other than Direct-Vent Appliance.

–18 –
LOCATION / CLEARANCES
When positioning the heater the main points
governing the location are:
1. Flueing
2. Warm air distribution
This heater is not designed to be build in.
The flue terminal should be positioned away from
flammable materials.
Do not flue into natural draught flues or fireplaces,
this unit can only be used with one of the five types
of Rinnai flue kits. Do not flue unit into other rooms.
Flue terminal must be outside.
Flue may be positioned directly under opening
windows, with a minimum clearance of 9" (230mm).
FLUE SIZES:
5 Flue lengths are available.
S flue walls 3"4 1/2" (75 115mm)
A flue walls 4 1/2"9 1/2" (115 240mm)
B flue walls 9 1/2"15 3/4" (240 400mm)
C flue walls 15 3/4"23 5/8" (400 600mm)
D flue walls 23 5/8"31 1/2" (600 800mm)
The flue is not designed to be positioned under
floors, or below the level of the heater.
Flue Terminal
LP GAS
Flue
Terminal
Flue
Terminal