SERVICE and
TRAINING MANUAL
MODELS:
IW60
ON DEMAND RV WATER HEATER
AIRXCEL, INC. - SUBURBAN DIVISION
FOR RECREATIONAL
VEHICLE USE ONLY
676 Broadway Street | Dayton, TN 37321 | USA | 423.775.2131 | www.Airxcel.com
Information published in this manual is subject to change without notice. | 10-31-2017
TOPIC
TABLE OF CONTENTS
INTRODUCTION
SPECIFICATIONS
Unit Dimensions
PAGE
3
3
3
INSTALLATION INSTRUCTIONS
Installation Without Using Replacement Panel
4
Installation Using Replacement Panel
4
Making Electrical Connections
4
Installation of Switch and Light Assembly
4
Installation of Option On Demand Control Center
4
Making Drain Connections
5
Making Water Connections
5
Making Gas Connections
5
OPERATING INSTRUCTIONS
Operating Instructions using Switch and Light Assembly
5
Operating Instructions using Optional On Demand Control Center
5
Operating Faucets and Shower
6
Turning OFF the Nautilus On Demand Water Heater
6
SEQUENCE OF OPERATION
6
OPERATIONAL TROUBLESHOOTING
No Water Flows from Faucet when Turned On
6
Burner Turns On, Temperature Fluctuates Erratically
6
On Demand Water Heater Comes On and Rapidly Cycles On and Off
6
Water Temperature is Too Low with Lower Water Flow
6
Water Temperature is Too High or No Temperature Control
6
Low Temperature Rise & Excessive Water Flow Required to Trigger the Nautilus
6
No Ignition
6
MAINTENANCE
Draining and Storage Instructions
7
Winterizing
7
Freeze Protection
7
Descaling Information
7
Pressure Relief Valve
7
INSTALLATION INSTRUCTION ILLUSTRATIONS
7
SEQUENCE OF OPERATION ILLUSTRATION CHART
14
ERROR CODES AND MEANINGS
16
TROUBLESHOOTING GUIDE
17
INTERIOR VIEWS, REPLACEMENT PANELS, and VENT CAP ILLUSTRATIONS
21
EXPANDED VIEWS and REPLACEMENT PARTS LIST
22
TWO YEAR LIMITED WARRANTY
24
NOTES
26
INTRODUCTION
This Service and Training Manual provided by the Suburban Products Factory Service
Department is intended to be used by qualified service technicians only as a valuable tool
in terms of product identification, troubleshooting and diagnosis of service issues, and as an
outline for information concerning proper procedures for filing warranty service claims.
Included in this manual are product installation instructions, sequence of operation information,
maintenance and service recommendations. In addition to the information available in this
manual, other resources for servicing Suburban Products RV appliances include our website
at www.AIRXCEL .com, our Factory Service Department Support Line at 423-775-2131
EXT. 7102, and our Customer Service Department Office at 423-775-2131 EXT. 7101.
Having an understanding of the appliance’s sequence of operation and access to or knowledge
of the wiring diagram are the cornerstones of proper diagnosis and troubleshooting. Other
points of emphasis encompass the adherence to proper installation methods, voltage and gas
pressure, and compliance to the physical installation tolerances and clearances. This manual
is designed to assist service technicians in making the correct diagnosis efficiently.
Proper maintenance and service of an appliance is of the upmost importance. Failure to keep
the appliance clean and well maintained is a significant contributing factor in the component
breakdown and premature failure of the appliance.
SPECIFICATIONS
BTU/HR
15,000 MIN to 60,000 MAX
FUEL
LP Gas (Propane)
INLET PRESSURE
MINIMUM 10.5 INCHES W.C.
MAXIMUM 14 INCHES W.C.
MANIFOLD PRESSURE
10.5 INCHES W.C.
WATER OPERATING
PRESSURE
MINIMUM: 30 LBS PSI
MAXIMUM: 150 LBS PSI
VOLTAGE
12 VDC NOMINAL;
10.5 VDC MINIMUM TO 14 VDC MAXIMUM
WATER FLOW REQUIREMENT
MINIMUM: 0.5 GPM
MAXIMUM: 1.5 GPM
MINIMUM WIRING GAUGE
MINIMUM WIRING GAUGE 20 AWG 600V 105°F (Degrees Fahrenheit)
AMP DRAW
2.5 AMPS
RECOMMENDED FUSE SIZE
2 FUSES with 5 AMPS per FUSE
NAUTILUS (IW60) ON DEMAND WATER HEATER DIMENSIONS
12.5” H x 12.5” W x 20.0” D
3
INSTALLATION WITHOUT REPLACEMENT PANEL
REPLACEMENT PANEL PART NUMBERS
1. Locate area for installation of the unit. The unit should be installed as
close to wall as possible. Mark wall as shown in Figure 4 and cut a
3.750" Diameter hole for vent installation. On mesa or yoder type side
walls, it may be required to flatten area where vent is to be installed to
ensure seal around vent assembly.
2. Place unit on floor (verify vent cap lines up with exhaust tube and
combustion air opening in unit).
a. Drain lines must be connected to the system and condensation
drains on the On Demand water heater and ran to the outside
of the RV. Drain Lines should be as short as possible and
must maintain a drop of ¼” per foot from unit. See Figure 5.
3. Install vent assembly. See Figure 6.
a. Vent cap must be ordered separately. See TABLE 1 for
vent sizes and part numbers. A minimum overlap of 1.25" is
required on exhaust.
b. Apply a bead of silicone around the vent cap as shown in Figure 6.
c. Install vent cap as shown in Figure 6 with screws. Ensure
assembly is sealed to outside wall to prevent leaks.
4. Screw the front of the unit to the floor using the two brackets as shown in
Figure 5.
5. Make electrical, drain, water and gas connections following
instructions contained in this manual or the manual supplied with
the Suburban NAUTILUS (IW60) On Demand Water Heater.
BRAND
CAPACITIES
PART NUMBER
SUBURBAN
6 GALLON
6276APW (Polar White)
SUBURBAN
10, 12, 16 GALLONS
6277APW (Polar White)
ATWOOD
6 GALLON
521147 (Polar White)
ATWOOD
10 GALLON
521150 (Polar White)
VENT CAP PART
NUMBER
VENT CAP LENGTH
"X" MAX DIMENSION
SEE FIGURE 7A
260616
0 - 1 inches
1.171 inch
260617
1 - 2 inches
2.171 inch
260618
2 - 3 inches
3.171 inch
260638
5 - 6 inches
6.171 inch
TABLE 1
MAKING ELECTRICAL CONNECTIONS
12 VOLTS D.C. (SEE FIGURE 11)
A. The electrical connections must be made in accordance with
local codes and regulations. In the absence of local codes and
regulations, refer to the latest edition of the National Electrical
Code NFPA 70.
In Canada, the electrical installation should conform with CSA standard
Z240.6.2-08/C22.2 No. 148-08 Electrical Requirements for
Recreational Vehicles.
B. Make the 12 Volt D.C. electrical connections following the wiring
diagram illustrated in Figure 11.
If the power supply is to be from a converter, we recommend that the
converter system be wired in parallel with the battery. This will serve
two purposes:
1. Provide a constant voltage supply
2. Filter any A.C. spikes or volt surges
We recommend insulated terminals be used for all electrical connections.
INSTALLATION USING REPLACEMENT PANEL
A replacement panel is used when replacing Suburban 6, 10, 12, and
16 gallon tank units and Atwood Style 6 and 10 gallon tank units.
1. On mesa or yoder type sidewalls, flatten the wall area around the
opening.
2. Apply a continuous line of suitable caulk on the RV wall around
all four sides of the opening and around back side of replacement
panel frame as shown in Figure 8. This caulk is required to create
water tight seal of the frame to the RV wall.
3. Center and insert caulked replacement panel frame into opening.
Push frame firmly against RV wall over caulking previously applied
in step 2. Secure frame with the eight (8) supplied screws into RV
wall as shown in Figure 8.
4. Locate the water heater cabinet approximately even with the inside
RV wall. See Figure 7B. If securing the unit to the floor using
the FRONT mounting brackets, proceed to STEP 5. To mount the
water heater using the REAR mounting method, remove the two
mounting brackets from the front of the unit and secure them to the
threaded holes at the rear of the unit. Screw the rear of the unit to
the floor using the two brackets. See Figure 7B.
5. Using the gasket supplied with the kit, apply the gasket beginning
at the center bottom of the replacement panel frame. Adhere the
adhesive side of the gasket to the replacement panel frame and
install the gasket all the way around the frame. Ensure the ends of
the gasket meet at the center bottom of the access panel frame.
6. Attach the replacement panel to the frame as shown in Figure 8
using the five (5) screws provided.
7. Vent cap must be ordered separately. See Table 1 for vent sizes and
part numbers. There must be a minimum of 1.25" (31.8mm) overlap
of vent assembly tube over exhaust tube on the On Demand Water
Heater and the replacement panel must compress the replacement
panel gasket. See Figure 7A.
a. Apply a bead of silicone around the vent cap as shown in
Figure 8.
b. Install vent cap as shown in Figure 8 with four (4) screws.
Ensure assembly is sealed to outside wall to prevent leaks.
8. Screw the front of the unit to the floor using the two brackets as shown
in Figure 5.
9. Apply silicone caulk around the beveled edges of the replacement
panel as shown in Figure 8. Do not caulk the bottom of the
replacement panel.
10.Make electrical drain, water and gas connections following
instructions contained in this manual or the manual supplied with
the Suburban NAUTILUS (IW60) On Demand Water Heater.
INSTALLATION OF SWITCH AND LIGHT ASSEMBLY
(SEE FIGURE 12)
1. ON/OFF switch is wired as shown in wiring diagram. See Figure 11.
2. There is a connection for a lockout light. (If used, this light will come
on if the unit goes into lockout. Water must be turned off and back on
to re-cycle the unit.)
3. Connect ORANGE wire to LED lamp (+) and BLUE wire to LED lamp (-).
INSTALLATION OF OPTIONAL ON DEMAND
CONTROL CENTER (SEE FIGURE 13)
1. On Demand Control Center is wired as shown in wiring diagram. See
Figure 11.
2. Locate the On Demand Control Center on a wall surface adjacent
to the On Demand water heater.
3. Remove back cover from control center by depressing latch at bottom.
4. Remove center knockout from back cover. Drill hole for wiring from
control center. See Figure 14.
5. Mount back cover to the wall.
6. Route wiring through back cover and hole into wall.
7. Connect the two white wires from the On Demand Control Center
to the two white wires from the On Demand water heater. See
Figure 11.
The optional On Demand Control Center displays the water temperature
and also allows outlet water temperature to be adjusted (130°F
maximum).
PART NUMBER
ON DEMAND CONTROL CENTER
4
BLACK
161253
WHITE
161252
MAKING DRAIN CONNECTIONS (SEE FIGURE 5)
faucet OPEN to a minimum of 0.5 GPM for the unit to operate.
If the burner does not light, the system will automatically attempt
two more tries for ignition before lock-out. When light remains
illuminated, the system is in lockout.
8. If lockout occurs, unit must be re-cycled by turning the faucet OFF
or turning the switch OFF and then back ON. The first start-up
of the heater may require several ignition cycles before all air is
purged from the gas lines.
This On Demand Water Heater is factory set at 49°C/120°F. To change
the water temperature settings, you will need to access the front of the
water heater.
1. Remove the SERVICE PANEL as shown in Figure 9.
2. Locate the set of four (4) dip switches located on the module board
and refer to Figure 12 for information on setting dip switches to
desired temperature setting.
A. Drain connections are made at the front of the water heater. Refer
to Figure 5. Connect 5/8” ID hose to system drain fitting provided
on front of unit. Connect ½” ID hose to condensation drain fitting
provided on front of unit.
B. Drain lines must run to the outside of the RV. Drain lines should be
as short as possible and must maintain a minimum drop of ¼” per
foot. (6.4mm per 305mm). See Figure 5.
MAKING WATER CONNECTIONS (SEE FIGURE 5)
A. Water connections are made at the front of the water heater. Refer
to Figure 5. Connect the hot and cold water lines to the 1/2” NPT
female pipe fittings provided on front of unit. These fittings are
marked “HOT” and “COLD”.
IMPORTANT: Use a pipe thread compound suitable for potable water or
pipe thread tape on all connections to ensure they will not leak.
B. For ease of removal, it is suggested that a pipe union be installed
in each water line.
C. Fill system with water. Open both hot and cold water faucets to
expel air from system. When system is filled and water flows from
faucets, close both faucets and check all connections for leaks.
OPERATING INSTRUCTIONS WITH OPTIONAL
ON DEMAND CONTROL CENTER (SEE FIGURE 13)
1. STOP! Read the safety information provided in the Operation
Manual that came with your unit.
2. Turn off all electric power to the appliance.
3. Turn “OFF” gas supply.
4. Wait five minutes for gas to clear the area. If you smell gas then
STOP! Follow instructions in item B of the SAFETY INFORMATION
provided in the Operation Manual that came with your unit. If you
do not smell gas, go to next step.
5. Turn “ON” gas supply.
6. Turn on electrical power to the appliance.
7. PRESS THE “ON” button. The On Demand Control Center is
illustrated in Figure 13. Your On Demand Control Center is located
somewhere inside the RV. The water heater operates based off of
"flow." There must be a hot water faucet OPEN to a minimum of 0.5
GPM for the unit to operate. If the burner does not light, the system
will automatically attempt two more tries for ignition before lock-out.
8. If lockout occurs, an ERROR CODE will be displayed on the On
Demand Control Center and the unit must be re-cycled by turning the
faucet OFF or by pressing the OFF button on the On Demand Control
Center and then back ON. The first start-up of the heater may require
several ignition cycles before all air is purged from the gas lines.
This On Demand Water Heater is factory set at 49°C/120°F. To change
the water temperature settings:
1. Press the UP or DOWN arrows on the On Demand Control
Center to increase or decrease the SET water temperature in
single degree increments. The water temperature set range is
35°C/95°F to 54°C/130°F. See Figure 13.
MAKING GAS CONNECTIONS
A. Connect a 3/8” gas supply line to the 3/8" flare fitting at gas valve.
When making the gas connection, hold the gas fitting on the valve
with a wrench when tightening the flare nut. Failure to hold fitting
securely could result in a gas leak due to fitting being damaged.
B. Turn on gas and check all fittings and connections for leaks using a
soap and water solution. Correct even the slightest leak immediately.
NOTE: When replacing your water heater with an NAUTILUS (IW60)
On Demand water heater, review your gas regulator to ensure it can
maintain a proper gas flow during the operation of the On Demand
water heater and other gas burning appliances.
NOTE: Regulator switch over pressure may be lower than main
operating pressure.
Maximum Capacity of Pipe in Cubic Feet of Gas per Hour for Gas Pressures of 0.5
PSIG or Less and a Pressure Drop of 0.3 Inch Water Column
INTENDED USE:
Tubing sizing between single or second-stage (low pressure) regulator and appliance.
Nominal:
K & L:
1/4
3/8
1/2
5/8
Nominal:
ACR:
3/8
1/2
5/8
3/4
Outside Diameter:
0.375
0.500
0.625
0.750
Inside Diameter:*
0.305
0.402
0.527
0.652
Length (feet)
Capacity in Thousands of BTU per Hour
10
45
93
188
329
20
31
64
129
226
30
25
51
104
182
40
21
44
89
155
50
19
39
79
138
OPERATING FAUCETS AND SHOWER WITH THE
NAUTILUS (IW60) ON DEMAND WATER HEATER
*Table capacities are based on TYPE K copper tubing I.D.
OPERATING INSTRUCTIONS WITH SWITCH AND
LIGHT ASSEMBLY (SEE FIGURE 12)
1. STOP! Read the safety information provided in the Operation
Manual that came with your unit.
2. Turn off all electric power to the appliance.
3. Turn “OFF” gas supply.
4. Wait five minutes for gas to clear the area. If you smell gas then
STOP! Follow instructions in item B of the OPERATING SAFETY
INFORMATION provided in the Operation Manual that came with
your unit. If you do not smell gas, go to next step.
5. Turn “ON” gas supply.
6. Turn on electrical power to the appliance.
7. Turn switch that operates the water heater to “ON” position. The
switch is illustrated in Figure 12. Your Switch may be different in
appearance and is located somewhere inside the RV. The water
heater operates based off of "flow." There must be a hot water
5
A. All faucets must be operated the same as you would in your home.
B. Unit thermostat is set at 120°F at the factory. Cold water must be
added to achieve the desired hot water temperature.
1. If this is the first use of the unit for the season, turn water
supply on and open each faucet and allow all air to be purged
from the water lines.
2. Turn ON power supply.
3. Turn ON propane supply. Hot water faucet may have to be
cycled several times to purge gas supply.
C. The water heater only heats when there is a call for water (open hot
water faucet).
D. A minimum of 0.5 gallons per minute is required for water heater
to operate.
E. Faucet should be turned on and adjusted to desired temperature
and flow before entering shower.
F. Shower head button should NOT be used. Using the shower head
button will create a drop in temperature by reducing or stopping the
flow of water through the water heater causing the water heater to
shut down.
G. Flow restrictors in faucets and shower heads should be removed
for best performance.
TO TURN OFF THE ON DEMAND WATER HEATER
ON DEMAND HEATER COMES ON AND RAPIDLY CYCLES ON AND
OFF:
1. Water flow is too low. Increase flow at faucet.
2. Clean all shower heads, faucet aerators or water strainers as
required and remove any flow restrictions to ensure the minimum
0.5 GPM of water flow.
3. Verify the water pump is functioning properly.
4. Bleed air out of plumbing lines by opening all water faucets.
5. If the On Demand water heater cycles as the pump cycles, an
accumulator tank is needed in the water system. If accumulator
tank is already installed, check for water inside the tank and drain
tank until only air is present.
6. Water source pressure fluctuates too low causing loss of flow.
Check the incoming water source for a minimum of 30 psi.
7. If using the standard ON/OFF Switch and Light, reset dip switches
back to factory setting of 120°F(see figure 12). If using the ON
DEMAND CONTROL CENTER, decrease the set temperature
back to 120°F.
1. Turn switch to “OFF” position for units using the Switch and Light
Assembly.
2. For units using the optional On Demand Control Center, press the
power button once.
3. Turn off electrical power to the appliance.
4. Turn off gas supply.
5. If vehicle is to be stored or heater is going to be turned off while
subject to freezing temperature, drain water heater. (See “Draining
and Storage Instructions.”)
SEQUENCE OF OPERATION
The following Sequence of Operation will be the same when using
either the ON/OFF SWITCH or the optional On Demand Control Center.
1. Turning on a hot water faucet activates the On Demand Water
Heater.
2. The flow sensor senses the flow of water.
3. The pressure switch proves that the combustion air fan is working.
4. The combustion chamber is then purged of any remaining raw gas.
5. The burner will ignite and the electrode/flame probe assembly
proves the flame.
a. The approximate time from turning on the faucet to ignition is
7 seconds. After the initial lighting sequence and the water
heater is maintaining temperature, the ignition cycle is reduced
to approximately 5 seconds.
b. Burners will stay ON until the water flow is shut off.
6. The flow of hot water at the SET point begins approximately 3
seconds after ignition but will not reach the faucet until the hot water
lines leading to the faucet are cleared of any remaining water. This
time is determined by the length of the hot water line.
7. When the hot water faucet is turned OFF, the water heater shuts down
and will remain in a ready state until hot water is called for again.
NOTE: Blower motor will operate for approximately 20 seconds after
the hot water faucet is turned OFF.
8. If the ON/OFF SWITCH or On Demand Control Center are left in
the ON position, no further action is required by the user.
9. If the water heater fails to light for any reason, a second Trial
For Ignition(TFI) will automatically begin. If the second Trial For
Ignition(TFI) fails, the water heater will automatically begin a third
Trial For Ignition(TFI). If the third Trial For Ignition(TFI) fails, the
water heater will go into a lock out mode and will not try to light the
burner again. To reset:
a. Using ON/OFF SWITCH: Turn Switch OFF then back ON.
b. Using the On Demand Control Center: Turn faucet OFF, then back
on.
NOTE: The NAUTILUS (IW60) On Demand WATER HEATER has
an energy mode circuit that will shut down operation if operating
continuously for three (3) hours. To reset, follow the instruction in STEP
9 A or B above.
NOTE: Air in the gas line after changing propane tanks is the main
reason for not lighting the burner. A simple method to remove air from
the gas line is to ignite a burner on the installed cooking appliance
inside your RV.
WATER TEMPERATURE IS TOO LOW WITH LOWER WATER FLOW:
1. Water flow is too low. Increase flow at faucet to ensure the minimum
0.5 GPM of water flow.
WATER TEMPERATURE IS TOO HIGH OR NO TEMPERATURE
CONTROL:
1. For units with the Standard Switch and Light assembly, adjust the
dip switches to the desired temperature. Refer to OPERATING
INSTRUCTIONS WITH SWITCH AND LIGHT ASSEMBLY and
see Figure 12 for information on setting dip switches to desired
temperature setting.
2. For units using the optional On Demand Control Center, press
the UP or DOWN arrows on the On Demand Control Center to
increase the SET water temperature in single increments. Refer
to OPERATING INSTRUCTIONS WITH OPTIONAL ON DEMAND
CONTROL CENTER and see Figure 13.
LOW TEMPERATURE RISE AND EXCESSIVE WATER FLOW
REQUIRED TO TRIGGER THE ON DEMAND WATER HEATER:
NOTE: If you find that your water heater requires excessive flow to
activate it (over 0.5 GPM), it is possible that you have COLD water
bleeding into the HOT water side of your water system.
1. Verify that valves and faucets are closed when not in use. Check
the shower head for an ON/OFF button/lever and ensure it is in
the OFF position to prevent cold water from bleeding into the hot
water system. This can keep the On Demand water heater from
functioning correctly.
2. If your RV is equipped with a bypass valve at the water plumbing
connection, make sure it is in the OFF position. An open valve can
allow water to bypass water heater causing a failure to ignite.
NO IGNITION:
If the burner will not come on, the following items should also be checked
before calling a service technician:
A. Switch turned off.
B. 12 VDC power is ON.
C. Gas supply to heater is empty or turned off.
D. Water turned on and faucet open.
E. Check manual reset on ECO switch. Refer to DETAIL "A" in
Figure 9.
If burner fails to light, call a Suburban service center or a local RV
service agency.
OPERATIONAL TROUBLESHOOTING
NOTE: There must be a demand of at least 0.5 GPM for the burner to
operate and allow water flow. This will continue until the water flow is
turned OFF and the system goes dormant.
NO WATER FLOWS FROM FAUCET WHEN TURNED ON:
1. Be sure water supply is turned ON and there are no water
restrictions.
2. Ensure BYPASS SYSTEM (if installed) is properly aligned for
operation.
BURNER TURNS ON, TEMPERATURE FLUCTUATES ERRATICALLY:
1. This issue can be caused by restriction in the shower heads, faucet
aerators or water strainers.
2. Clean as required and remove any flow restrictions.
6
MAINTENANCE
A. Periodically inspect unit for soot. If soot is present anywhere
on water heater, immediately shut unit down. Soot is a sign of
incomplete combustion and must be corrected before operating
water heater. Areas to check would include:
1. Check for an obstruction in vent cap.
2. Check vent to see that no foreign material has accumulated to
prevent flow of combustion and ventilating air.
3. Check to be sure there is no flame present at burner orifice
or burner whenever main gas valve is closed. This can be
checked by turning the ON/OFF switch to the “OFF” position.
B. Periodically check wiring and wire connections to be sure wiring
is not damaged/frayed and that all terminals and connections
are tight and in compliance with codes (See “Making Electrical
Connections”).
INCORRECT
Enlarged for illustration purposes only
DRAINING AND STORAGE INSTRUCTIONS
Figure 1
If RV is to be stored during winter months, the water heater system must
be drained to prevent damage from freezing.
1. Turn off electrical power to water heater either using the switch, the
On Demand Control Center or by removing the fuse.
2. Shut off gas supply to water heater.
3. Turn off pressure pump on water system.
4. Open both hot and cold water faucets.
5. Remove Service Panel to access system drain valve.
6. Turn drain valve knob clockwise to drain.
7. Follow RV manufacturer’s instructions for draining entire water system.
NOTE: System will have to be refilled with water and all air removed
from lines before unit will re-light.
NOTE: All water must be drained to the outside of the RV - Drain lines
must be connected to the system and condensation drains on the water
heater and ran to the outside of the RV. Drain lines should be as short as
possible and must maintain a drop of ¼” per foot from unit. See Figure 10.
WINTERIZING
1. Follow RV manufacturer's instructions for draining entire water system.
2. Once drained, RV NON-TOXIC antifreeze can be added if
recommended by your coach manufacturer.
FREEZE PROTECTION
The NAUTILUS (IW60) On Demand water heater has built-in FREEZE
PROTECTION and will intermittently cycle the burner when the water
temperature has fallen below 40°F(4.4°C). This intermittent cycling will
continue until the water temperature has risen above 50°F(10.0°C). To
provide this freeze protection, gas and electrical must be turned on.
INCORRECT
Figure 2
Enlarged for illustration purposes only
If the On Demand Water Heater is dripping water into the drain line, in
cold weather, when the water supply temperature is below 38°F and
does not stop when the water temperature rises above 38°F, call your
local service center. The valve may be disabled by turning the needle
valve located on the front of the On Demand Water Heater 6 and 1/2
turns clockwise. Closing the valve will disable the mechanical freeze
protection feature. The water system must be drained when not in
use to avoid damage caused by ice expanding in water lines if valve
is closed.
DESCALING INFORMATION
Each year, drain the water from the system and flush the heat
exchanger using Suburban’s authorized decalcification kit. To order this
decalcification kit, please contact your preferred distributor and order Kit
Number 521163.
PRESSURE RELIEF VALVE
The temperature and pressure relief valve is designed to open if the
temperature of the water within the heater reaches 210°F, or if the water
pressure in the heater reaches 145 psi.
Suburban recommends that a check valve not be installed directly at the
inlet to the water heating unit.
CORRECT
Enlarged for illustration purposes only
Figure 3
7
UNIT
Ø.125 (4 PLACES)
45ØTYP
Ø3.750 HOLE FOR VENT ASSEMBLY
4.370
9.488
3.945
2.256
CL
Figure 4
SCREW UNIT TO FLOOR
AS SHOWN
ELECTRICAL CONNECTION
WATER SUPPLY INLET
FREEZE PROTECTION NEEDLE VALVE
SYSTEM DRAIN LINE
5/8" I.D. TUBING
WATER SUPPLY
OUTLET
CONDENSATE DRAIN
1/2" I.D. TUBING
GAS
CONNECTION
Figure 5
8
(BACK VIEW)
RV WALL
APPLY SILICONE COMPLETELY AROUND
BACK SIDE OF VENT FLANGE (MUST BE
SEALED TO OUTER WALL)
Figure 6
"X"
TRAILER SKIN
1.250 MIN. OVERLAP
REQUIRED ON EXHAUST
ON DEMAND WATER HEATER
VENT CAP
MOUNTING SCREWS
FOR VENT
CAP ASSEMBLY
GASKET
EXHAUST
VENT TUBE
VENT CAP PART NO. 260617 SHOWN FOR INSTALLATION WITHOUT ACCESS PANEL. MAX "X" DIMENSION OF 2.00".
Figure 7A
9
OVERHEAD VIEW
FRONT OF UNIT
ALTERNATE MOUNTING
BRACKET LOCATION
RV
WALL
RV
WALL
REAR OF UNIT
ACCESS PANEL
MOUNTING SCREWS
"Y"
ACCESS PANEL WITH FRAME
GASKET
SUBURBAN
ACCESS PANEL
"Y" DIMENSION
6 GALLON
4.895"
10 GALLON
6.634"
Figure 7B
SILICONE OR CAULKING AROUNG
OPENING FOR 10 GALLON ACCESS PANEL
(IF APPLICABLE)
(2) SLOTS IN BOTTOM OF
PANEL HOOK IN TABS ON
FRAME BEFORE INSTALLING
(5) SCREWS TO SECURE
PANEL.
SILICONE OR
CAULKING AROUND OPENING
MOUNTING TABS
IN FRAME
(8) SCREWS
BOTTOM OF PANEL
GASKET
(5) SCREWS
APPLY SILICONE COMPLETELY AROUND
BACK SIDE OF VENT FLANGE (MUST BE
SEALED TO ACCESS PANEL)
(4) SCREWS
AFTER INSTALLATION, CAULK AROUND
BEVELED EDGE OF ACCESS PANEL
DO NOT CAULK THE BOTTOM
EDGE OF THE REPLACEMENT PANEL
Figure 8
10
LEFT SIDE
ACCESS PANEL
SERVICE PANEL
A
MANUAL ECO SWITCH
DETAIL A
Figure 9
SYSTEM DRAIN
CONTROL KNOB
GREEN GROUND SCREW
SYSTEM DRAIN
5/8" I.D. TUBING
CONDENSATE DRAIN
1/2" I.D. TUBING
Figure 10
11
FREEZE PROTECTION
NEEDLE VALVE
*
Y/G
LIGHT IS ONLY TO BE
R
ON DEMAND
CONTROL
W1 W2
CENTER
R
WH
BL
WH
BL
R
AUTO RESET
LIMIT SWITCH
O
4
1 2
5
8
3 4
MODULE
BOARD
INLET WATER
TEMPERATURE PROBE
WIRE HARNESS
(
CODE COLOR
BK
BR
BL
R
Y
G
O
GY
ON
WH
WH
WH
WH
Y/G
ON
1
11
1
4
12
22
5
8
WH
WH
2 STAGE
GAS
VALVE
G
R
BK
BK
R
BR
BR
BR
X
R
Y
BK
MOTOR
WATER FLOW
SENSOR
X
GAS
VALVE
WIRE HARNESS
( - - - - - - - - - - FIELD WIRING)
FACTORY WIRING)
CAUTION: DO NOT HI-POT
(DIELECTRIC HIGH VOLTAGE TEST)
THIS UNIT AFTER INSTALLATION.
TO DO SO MAY CAUSE COMPONENT
DAMAGE AND VOIDS WARRANTY OF
WATER HEATER.
UNIT 100% FIRE CHECKED.
ALL WIRES ARE 22 AWG UNLESS OTHERWISE SPECIFIED.
NOTE: IF ANY OF THE ORIGINAL WIRES AS SUPPLIED WITH
THE APPLIANCE MUST BE REPLACED, IT MUST BE
REPLACED WITH WIRING MATERIAL HAVING A
TEMPERATURE RATING OF AT LEAST 80° C.
BLACK
BROWN
BLUE
RED
YELLOW
GREEN
ORANGE WH
Y/G
GREY
R +12 V.D.C.
SWITCH
BR
OUTLET WATER
TEMPERATURE PROBE
LAMP
BK -12 V.D.C.
3 6
BL
W
BK
*
+
-
R
MANUAL RESET
LIMIT SWITCH
Y
R
R
GY
WH
BR
BK
BL
1
1 4
BL
FAN
BOARD
Y
O
BL
AIR PRESSURE
SWITCH
X
FLAME PROBE
USED WITH BLUE AND
ORANGE WIRES FROM
IW60. TO AVOID DAMAGE
TO THE MODULE BOARD,
DO NOT CONNECT SUPPLY
VOLTAGE TO LAMP.
X
SPARK
ELECTRODE
20 AWG 600V 105°C
18 AWG 600V 105°C
WHITE
YELLOW/GREEN
340587
Figure 11
STANDARD SWITCH AND LIGHT ASSEMBLY
ON
X X
WATER HEATER
1
2
ON
3
4
DIP SWITCHES (D3 & D4)
SEE TEMPERATURE SETTING ON CHART
ON
RESET
D3
ON
OFF
ON
OFF
D4
ON
OFF
OFF
ON
TEMPERATURE
108°F 42°(C)
120°F 49°(C)
125°F 52°(C)
130°F 54°(C)
* ON DEMAND WATER HEATER IS FACTORY
SET AT 120°F (49°C).
Figure 12
12
*
OPTIONAL ON DEMAND CONTROL CENTER
DISPLAY DESCRIPTION
2 BURNERS
1
BURNERS
2
FLAME
This icon is displayed
FLAME is established.
3
BLOWER
This icon is displayed when the
BLOWER is running
4
STATUS
INDICATOR
This icon is displayed when the
Water Heater is in standby mode,
ready to be used.
6
5 BURNERS
when
A. When setting the water temperature,
5
SETTING TEMP
INDICATOR;
OUTLET WATER
TEMP INDICATOR
5
the temperature display will flash.
After SET Temperature is reached,
the display stops flashing after a few
seconds.
B. When the demand for hot water has
been terminated, the display will return
to the SET Temperature.
C. When the water heater is turned off,
the letters "OF" will be display.
3
4
1
7
FREEZE
PROTECTION
6
2
8
9
This icon is displayed when
the
FREEZE
PROTECTION
MECHANISM is engaged.
BUTTON DESCRIPTION
7
ON/OFF
Power Button. Switch from turning
unit ON or turning unit OFF.
8
SWITCH
Hold for 5 seconds to switch
between degrees (°) Celsius or
degrees (°) Fahrenheit
UP
INCREASE SET Temperature
by 1 degree increments. Setting
range is 35°C/95°F to 55°C/130°F
DOWN
DECREASE SET Temperature
by 1 degree increments. Setting
range is 35°C/95°F to 55°C/130°F
10
°C/°F
°C/°F
9
10
Figure 13
MOUNTING HOLES
KNOCK OUT
Figure 14
13
SEQUENCE OF OPERATION
COMPONENT
ACTION
FAUCET
Turning on a hot water faucet activates the DEMAND
Water Heater.
FLOW SENSOR
The water heater flow sensor senses the flow of water.
MODULE BOARD IW60
The water heater module board receives voltage signal
from sensor and provides power to the Fan control
module board. (time line 2-3 seconds).
MODULE BOARD IW60
FAN BLOWER
BLOWER ASSEMBLY
The combustion air blower motor starts and completes
the circuit to the Pressure switch. (2-3 seconds).
PRESSURE SWITCH
14
SEQUENCE OF OPERATION
COMPONENT
ACTION
SENSOR OVERHEAT
Voltage is completed through the Limit and over-heat
sensor switches.
LIMIT SWITCH
ELECTRODE / FLAME
PROBE ASSEMBLY
GAS VALVE
REGULATOR TWO
STAGE
Module board receives voltage and ignition circuit begins
(approximately seven (7) seconds from faucet being
turned ON). Spark and gas valve are energized (ignition
cycle approximately seven (7) seconds).
Flame sense is confirmed during trial for ignition (TFI)
time frame
Burners will remain ON until the water flow is turned OFF.
NOTE: Depending on demand the Proportional valve will
energize two (2) orifices or five (5) during cycle.
Blower motor will operate approximately 20 seconds
after the hot water faucet is turned OFF.
NOTE: If ignition fails on first TFI there is prepurge time of three (3) seconds and ignition begins with
a seven (7) second TFI if flame is not detected in second TFI it goes into a third TFI if flame is not
detected the module board goes into LOCKOUT and requires reset of Power or turn faucet OFF then
back ON to start cycle.
If the ON DEMAND CONTROL CENTER is connected an E1 code will be displayed. Reset switch or
turn faucet OFF and back ON to start cycle.
15
°C/°F
ERROR CODES
FAULT
INDICATION
CODE MEANING
FAULT CAUSE
FAULT CONDITION
E1
Ignition fault
Flame signals
undetectable after igniting
twice
LOCKED
E2
Accidental stall fault
Without flame during
combustion
LOCKED
E3
“False fire fault”
“Residential fire fault”
Flame signals detected
before start, Stop burning
4S, flame signal is
detected
LOCKED
E4
Water overheating
Water output
NTC>90°C °F
LOCKED
E5
Thermal switch fault
Overheat switch off
LOCKED
E6
Air pressure switch fault*
Air pressure switch
or fan abnormal
LOCKED
E7
Water entry NTC fault
Water entry
NTC open/short circuit
AUTOMATIC
RECOVERY
E9
Water NTC fault
Water input/output
NCT open/short circuit
AUTOMATIC
RECOVERY
EC
Communication failures
Line controller
communication failure
AUTOMATIC
RECOVERY
16
TROUBLESHOOTING
GUIDE
MODEL:
IW60
ON DEMAND RV WATER HEATER
FOR RECREATIONAL
VEHICLE USE ONLY
To use this guide, look up the symptom in the FAULT column. Test each
possible cause in the order listed using the steps provided to determine what
corrective action to take.
If an ERROR code is present, look up the ERROR CODE using the column
provided. Test each possible cause in the order listed using the steps
provided to determine what corrective action to take.
17
WATER HEATER
WILL NOT START
FAULT
Module Board
Water flow sensor
Inlet water temperature probe (NTC)
6
8
9
11
Blower not operating
Module Board
5
10
Check incoming voltage - should be 10.5-14 VDC
Supply voltage
4
YES
Inspect seating of NTC probe
YES
YES
Check terminals in all wiring harnesses accessible from control panel
to verify each terminal is fully seated in harness and no debris is Reseat terminals in harness if loose, clean terminals if debris is found
blocking connection between terminals
Check voltage between pin #3 (red) and pin #16 (black) on input plug If all voltage parameters are correct, replace Blower Assembly 391127.
on control module board plug - should be 10.5-13.5 VDC
If unit fails any of these parameters, replace Module Board 233232
Check voltage between pin #8 (brown) and pin #4 (black) on input
plug on fan control board output block - should be approximately 2.5
VDC
Check voltage between pin #6 (gray) and pin #7 (white) on input plug
on fan control board output block - should be approximately 2.5 VDC
Check voltage between pin #5 (red) and pin #4 (black) on input plug
on fan control board output block - should be approximately 5 VDC
Check voltage between pin #4 (white) and pin #4 (black) on input plug
on fan control board input block - should be 5.5 - 8.5 VDC
Check voltage between pin #4 (yellow) and pin #4 (black) on input
plug on fan control board input block - should be 3.2 VDC
Check voltage between pin #1 (red) and pin #2 (black) on input plug
on fan control board input block - should be 10.5-13.5 VDC
YES
Verify switch continuity. Resistance should be between 100Ω and
Replace NTC probe
200kΩ
Correct seating of NTC probe
YES
YES
YES
Verify polarity is correct and blue/orange wires are not connected
to supply voltage or ground, verify white wires are not connected to
supply voltage or ground. If all this is still correct, replace Module
Board.
Replace Module Board
YES
YES
Disconnect blue/orange wires from anything other than LED Lamp
and disconnect white wires from anything other the ODCC. Verify they
cannot make contact with any possible ground or supply voltage
Troubleshoot RV power supply
YES
YES
IN COACH
REPAIR?
Correct polarity if incorrect, replace fuse
Remove fuse and insert properly into terminal
CORRECTIVE ACTION
Turn one faucet to a very slow trickle of water, then measure voltage
between pin #10 (yellow) and pin #22 (black). The voltage should be If voltage remains constant regardless of the flow rate, replace flow
fluctuating, if not, try altering the water flow slightly and rechecking sensor
voltage.
Unit displays E8 error code when given demand
Unit keeps blowing fuses during fuse replacement
Verify blue/orange/white wires are not connected to supply voltage.
3
Check polarity of supply voltage - Black (-12 VDC), Red (+12 VDC)
2
Blown fuse (either)
Verify fuse is properly seated in both terminals
TEST
1
STEP POSSIBLE CAUSE
NAUTILUS (IW60) ON DEMAND WATER HEATER TROUBLESHOOTING GUIDE
E6
E6
E7
N/A
E8
N/A
N/A
N/A
N/A
N/A
ERROR
CODE
WATER
TOO HOT
FAN IS IN
CONTINUOUS
OPERATION
REGARDLESS
OF DEMAND
FAN COMES ON,
SPARK OCCURS,
UNIT SHUTS
DOWN AFTER A
FEW SECONDS
FAN COMES ON,
SPARK OCCURS,
UNIT IGNITES
BUT GOES OUT,
AND THEN
REPEATS
FAN COMES
ON, NO SPARK
OCCURS, FAN
SHUTS DOWN
AFTER A FEW
SECONDS
FAULT
Limit switch
4
Control board dip switch
2
Outlet water temperature probe (NTC)
On demand control center
1
3
Module Board
Flame sense
1
3
Gas Valve
2
No spark
5
RV Gas Supply
Blower Assembly
4
1
Pressure switch won't close
3
Gas Valve
Pressure switch hose
2
1
Pressure Switch Adapter
1
STEP POSSIBLE CAUSE
Troubleshoot RV fuel system.
Check continuity across pin #2 (red) and #5 (red). If not continuous,
trace wiring to verify all connections are secure, and measure
Replace limit switch
continuity across each individual limit switch. If either one does not
have continuity, replace it
NO
NO
Verify switch continuity. Resistance should be between 100Ω and
Replace NTC probe
200kΩ
Correct seating of NTC probe
Inspect seating of NTC probe
YES
YES
YES
Adjust set point
Replace Module Board
Review dip switch setting, review installation manual for correct
Adjust dip switch setting
settings
Check set point
Fan stays on
NO
NO
Clean with nonabrasive pad, make minor position adjustments to
cross two flame paths in a perpendicular fashion. If sensor can't be
adjusted to proper position, may have to replace flame sense probe
Verify flame impingement of electrode via viewing window
Use multimeter on μA setting, depending on flow, it should read
Replace flame sense probe
between 20-30 μA while unit is in operation
NO
Inspect Terminal and verify it is properly seated
Gas Valve
- No
Module
Board Yes
YES
Verify wire plugged in and not damaged
Check voltage at pin #1 (red) and pin #2 (brown) of the gas valve plug
on the control module board 233232. Should modulate between 2
and 7 VDC considering demand, if 0 VDC is observed, then replace
Replace Gas Valve 161248 or Module Board 233232
module board 233232. Verify no debris is in terminals blocking
connection and that all terminals are fully seated inside the wiring
harness. If proper voltage is found, replace Gas Valve 161248
Verify unit has sufficient LP supply 11-14" W.C.
YES
NO
Check spark electrode gap. Should be 1/8" gap. Also search for
Replace electrode
cracks on electrode
Check brown and red wires going to valve from board. Verify no debris
is impeding terminal connection and verify terminals are full seated
Correct terminal seating and clean terminal if needed
and secured to spade on valve. Verify terminals on board are fully
seated inside harness
NO
Very low RPM (less than 200) is observed, can be tested by placing a
small piece of paper approx. 4" from exhaust vent, if paper does not Replace Blower Assembly
move, or moves very little, replace motor
NO
YES
IN COACH
REPAIR?
NO
Replace pressure switch hose
Remove blockage from unit
CORRECTIVE ACTION
Remove wire harness, and check continuity across pressure switch,
Replace pressure switch
pin #6 (blue) and pin #7 (blue)
Ensure hose connected on both ends, not damaged
Debris/blockage inside pressure tap port located inside exhaust port
TEST
NAUTILUS (IW60) ON DEMAND WATER HEATER TROUBLESHOOTING GUIDE
E5
E9
N/A
E6
N/A
E1
E1
N/A
E1
E6
E6
E6
E6
ERROR
CODE
Modulating gas valve
Secondary gas valve
Flame sense
Clogged gas orifice
5
6
7
8
Vent blocked
Debris inside combustion chamber
RV Regulator/Supply Hose
1
2
3
1
1
1
LOW GAS
PRESSURE
EXCESSIVE SOOT
IN EXHAUST
RESIDUAL
BURNER FLAME
COMBUSTION/
SOOT PRESENT
ON VENT CAP
Leaking water line
1
WATER INSIDE
CABINET
Gas valve not sealing properly
Erratic burner
RV regulator
Freeze protection valve
1
WATER DRIPPING
FROM FREEZE
PROTECTION
Module Board
1
Gas Valve
Gas supply
4
2
Control board dip switch
3
Module Board
On demand control center
2
1
Water flow
1
STEP POSSIBLE CAUSE
UNIT OPERATES
NORMALLY BUT
ODCC WILL ONLY
DISPLAY "OF"
WATER
TEMPERATURE
REPEATS GOING
FROM HOT TO
COLD
WATER TOO
COLD
FAULT
CORRECTIVE ACTION
Clear gas orifice of clogs
Replace flame sensor
Replace Module Board
Replace Gas Valve
Replace RV regulator
Check voltage at pin #1 (red) and pin #2 (brown) of the gas valve plug
on the control module board while unit is in shutdown mode.
NO
YES
If voltage is between 2-7 VDC - Replace control module board
-
YES
If voltage is 0 VDC - Replace gas valve
Check sight glass: all or most of flame should be blue. If flame is
mostly yellow, remove unit and clean the area around combustion Clean area surrounding combustion chamber
chamber
Check gas pressure
YES
Verify regulator has sufficient output and supply hose has sufficient
Replace regulator or supply hose
inside diameter with no kinks or obstructions
YES
YES
NO
Tighten components if leak occurs at threaded connection. Replace
unit if not.
Remove blockage
YES
YES
NO
YES
NO
NO
Verify all drains are opened, not clogged. Remove side panel of unit
Clean unit and drain lines
and verify it is clean of any foreign contaminants.
Check for blockage in vent
Pinpoint leak location
With water in off position, locate screw underneath water inlet on
outside of unit, turn screw CCW until fully seated. Turn water on at
sink, if water still flows out of drain, make sure manual drain 172022
Replace freeze protection valve
is in off position. If water continues to flow out drain 172020, gradually
back screw on rear of unit CW and if water starts to flow from drain
172020, replace Freeze Valve 233307
Module board is not properly communicating with ODCC
Gas Valve is fully engaged not modulating down
Check voltage at pin #1 (red) and pin #2 (brown) of the gas valve
Replace Module Board
plug on the control module board. Voltage should not exceed 8.5 VDC
Check gas orifice for clogs
Use multimeter on μA setting, depending on flow, it should read
between 20-30 μA while unit is in operation.
Verify wire plugged in and not damaged
Verify flame impingement of electrode
NO
Open two devices (ex: faucet + shower) to full hot, check for number of
flames in viewing port. Should be more than 2 flames present. If only
2 are present, check voltage at pin #6 (green) and pin #7 (black) of Replace gas valve or Replace module board
the gas valve plug on the control module board. If voltage is present,
replace valve, if no voltage is present, replace control module board
YES
NO
Troubleshoot RV gas supply
YES
YES
YES
IN COACH
REPAIR?
Check voltage at pin #1 (red) and pin #2 (brown) of the gas valve plug
on the control module board. Should modulate between 2 and 7 VDC Replace gas valve
considering demand
Verify gas supply is turned on, with a pressure of 11 - 14 " WC
Check set point
Adjust set point
Review dip switch setting, review installation manual for correct
Adjust dip switch setting
settings
Verify water flow rate (gallons per minute) at faucet using bucket and
stopwatch. Must be greater than 0.5 gpm to function. Very high flow rates or very cold inlet water can also cause cold outlet water.
TEST
NAUTILUS (IW60) ON DEMAND WATER HEATER TROUBLESHOOTING GUIDE
E3
N/A
N/A
N/A
N/A
E6
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
E1, E2
N/A
N/A
N/A
ERROR
CODE
INTERIOR VIEWS
DOMESTIC NAUTILUS (IW60) ON DEMAND WATER HEATER
LEFT VIEW
DOMESTIC NAUTILUS (IW60) ON DEMAND WATER HEATER
RIGHT VIEW
REPLACEMENT PANELS
6 Gallon Suburban
Replacement Panel
10, 12 or 16 Gallon Suburban
Replacement Panel
6 Gallon Atwood Style
Replacement Panel
VENT CAPS
AVAILABLE IN 1”, 2”, 3”, OR 6” lengths
21
10 Gallon Atwood Style
Replacement Panel
13
80
79
CABINET ASSEMBLY
61
64
69
72
35
14
11
68
57
40
10
62
60
65
54
8
34
46
36
9
53
50
97
96
67
52
22
NAUTILUS (IW60) PARTS ILLUSTRATION AND PARTS LIST
ITEM NO.
PART NUMBER
DESCRIPTION
QTY.
8
071981
GASKET, RUBBER 1/2"
9
9
071982
GASKET, RUBBER 3/4"
2
10
071983
GASKET, HEAT EXCHANGER
1
11
071984
GASKET, BLOWER ASSEMBLY
1
13
071986
GASKET, EXHAUST CABINET
1
14
071991
GASKET, RUBBER SEALING RING
1
34
161248
VALVE, GAS DEMAND WH
1
35
161249
SOLENOID, TWO STAGE REGULATOR
1
36
161250
VALVE, PRESSURE RELIEF
1
40
172002
GAS INLET PIPE DEMAND WH
1
46
172013
OUTLET, WATER DEMAND WH
2
50
172032
FITTING, GAS INLET ASSY
1
52
172020
FITTING, BRASS DRAIN
1
53
172021
FITTING, INTER 4 WAY JOINT
1
54
172022
VALVE, WATER DRAIN SHUT-OFF
1
57
521135
MODULE BOARD IW60
1
60
233229
AIR PRESSURE SWITCH
1
61
233231
SENSOR, OVERHEAT
1
62
521136
MODULE BOARD, BLOWER CONTROLS
1
64
233235
PROBE, TEMPERATURE DEMAND WH
2
65
233237
FLOW SENSOR DEMAND WH
1
67
233243
VALVE, FROST PROTECTION
1
68
233245
ELECTRODE/FLAME PROBE
1
69
233253
SWITCH, LIMIT WITH RESET
1
73
391127
BLOWER ASSY, DEMAND WH
1
79
161252
ON DEMAND CONTROL CENTER (WHITE)
A/R
79A
161253
ON DEMAND CONTROL CENTER (BLACK)
A/R
80
232589
SWITCH/LAMP & PLATE ASSY (WHITE)
A/R
80A
232795
SWITCH/LAMP & PLATE ASSY (CREAM)
A/R
80B
232229
SWITCH/LAMP & PLATE ASSY (BLACK)
A/R
96
031382
SCREEN, WATER INLET
1
97
063849
CLIP, RETAINER
1
23
MODEL:
IW60
ON DEMAND RV WATER HEATER
FOR RECREATIONAL
VEHICLE USE ONLY
TWO YEAR
LIMITED WARRANTY
TWO YEAR LIMITED WARRANTY
This Suburban product is warranted to the original purchaser to be free from defects in material and
workmanship under normal use and maintenance for a period of two years from date of purchase whether
or not actual use begins on that date. It is the responsibility of the consumer/owner to establish the warranty
period. Suburban does not use warranty registration cards for its standard warranty. You are required to
furnish proof of purchase date through a Bill of Sale or other payment records.
Suburban will replace any parts that are found defective within the first two years and will pay a warranty
service allowance directly to the recommended Suburban Service Center at rates mutually agreed upon
between Suburban and its recommended service centers. Replacement parts will be shipped FOB the
shipping point within the Continental United States, Alaska and Canada to the recommended service
center performing such repairs. All freight, shipping and delivery costs shall be the responsibility of the
owner. The exchanged part or unit will be warranted for only the unexpired portion of the original warranty.
Before having warranty repairs made, confirm that the service agency is a recommended service center
for Suburban. DO NOT PAY THE SERVICE AGENCY FOR WARRANTY REPAIRS; SUCH PAYMENTS
WILL NOT BE REIMBURSED.
Suburban reserves the right to examine the alleged defect in the water heater or component parts, and it is
the owner’s obligation to return the water heater and/or component parts to Suburban or its representative.
When returning a water heater, it must include all component parts and the serial number plate. Returned
component parts must be individually tagged and identified with the water heater’s model number, serial
number and date of installation.
For warranty service, the owner/user should contact the nearest recommended Suburban Service Center,
advising them of the model and serial numbers (located on the water heater) and the nature of the defect.
Transportation of the RV to and from the Service Center and/or travel expenses of the Service Center to
your location is the responsibility of the owner/user. A current listing of recommended service center may
be obtained from Suburban’s website: www.Airxcel.com. If you cannot locate a recommended service
center locally, the service agency chosen to perform warranty repairs must contact our Service Department
at 423-775-2131 for authorization before making repairs. Unauthorized repairs made will not be paid by
Suburban.
LIMITATION OF WARRANTIES
ALL IMPLIED WARRANTIES (INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY) ARE
HEREBY LIMITED IN DURATION TO THE PERIOD FOR WHICH EACH LIMITED WARRANTY IS GIVEN.
SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS SO
THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU. THE EXPRESSED WARRANTIES MADE IN THIS
WARRANTY ARE EXCLUSIVE AND MAY NOT BE ALTERED, ENLARGED, OR CHANGED BY ANY
DISTRIBUTOR, DEALER OR OTHER PERSON WHOMSOEVER.
continued on next page . . .
24
MODEL:
IW60
ON DEMAND RV WATER HEATER
FOR RECREATIONAL
VEHICLE USE ONLY
TWO YEAR
LIMITED WARRANTY
SUBURBAN WILL NOT BE RESPONSIBLE FOR:
1. Normal maintenance as outlined in the installation, operating and service instructions owner’s manual
including cleaning of component parts and cleaning or replacement of the burner orifice. Any water
damage arising, directly or indirectly, from any defect in the water heater or component parts or from its
use.
2. Initial checkouts and subsequent checkouts which indicate the water heater is operating properly, or
diagnosis without repair.
3. Damage or repairs required as a consequence of faulty or incorrect installation or application not in
conformance with Suburban instructions.
4. Failure to start and/or operate due to loose or disconnected wires; water or dirt in controls, fuel lines and
gas units; improper gas pressure; low voltage.
5. Cleaning or adjustment of components; electrode, burner tube, pilot and thermocouple.
6. Costs incurred in gaining access to the water heater.
7. Parts or accessories not supplied by Suburban.
8. Freight charges incurred from parts replacements.
9. Damage or repairs needed as a consequence of any misapplication, abuse, unreasonable use,
unauthorized alteration, improper service, improper operation or failure to provide reasonable and
necessary maintenance.
10.Suburban products whose serial number has been altered, defaced or removed.
11.Suburban products installed or warranty claims originating outside the Continental U.S.A., Alaska,
Hawaii and Canada.
12.Damage as a result of floods, winds, lightning, accidents, corrosive atmosphere or other conditions
beyond the control of Suburban.
13.ANY SPECIAL, INDIRECT OR CONSEQUENTIAL PROPERTY, ECONOMIC OR COMMERCIAL
DAMAGE OF ANY NATURE WHATSOEVER
Some states do not allow the exclusion of incidental or consequential damages, so the above limitation
may not apply to you.
NO REPRESENTATIVE, DEALER, RECOMMENDED SERVICE CENTERS OR OTHER PERSON IS
AUTHORIZED TO ASSUME FOR SUBURBAN MANUFACTURING COMPANY ANY ADDITIONAL,
DIFFERENT OR OTHER LIABILITY IN CONNECTION WITH THE SALE OF THIS SUBURBAN PRODUCT.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to
state.
IF YOU HAVE A PRODUCT PROBLEM:
FIRST: If your RV has its original water heater and is still under the RV manufacturer’s warranty, follow the
steps suggested by your dealer or manufacturer of the RV.
SECOND: Contact a conveniently located recommended Suburban Service Center. Describe to them the
nature of your problem, make an appointment, if necessary, and provide for delivery of your RV to the
selected service center.
THIRD: For the location of the nearest Service Center, refer to the listing provided or contact:
AIRXCEL, INC. - SUBURBAN DIVISION Customer Service Department
676 Broadway Street | Dayton, Tennessee 37321 | (423) 775-2131, Ext. 7101 | www.Airxcel.com
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NOTES
26
NOTES
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AIRXCEL, INC. - SUBURBAN DIVISION
676 Broadway Street | Dayton, Tennessee 37321 | 423-775-2131 | Fax: 423-775-7015 | www.Airxcel.com
Email: SMCSales@SuburbanMfg.com
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