Camplux RS264 User manual

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Model: RS264/RS264B
Optional Colour
White Black
2.64 GPM RV TANKLESS WATER HEATER
Instruction For Installation And Use
Model: RS264/RS264B

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Thank you for purchasing this Camplux RV tankless water heater. Before
operating your new product, please read these instructions carefully. This will
ensure safe use and reduce the risk of injury.
This instruction manual contains information for installation, operation,
maintenance of the product and safe use.
WARNING
If the information in these instructions is not followed exactly, a fire or explosion may
result, causing property damage, personal injury, or death.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this
or any other appliance.
Installation and service must be performed by a certified service technician,
service agency, or the gas supplier.
What to do if you smell gas
● Evacuate all persons from the vehicle.
● Shut off the gas supply at the gas container or source.
● Do not touch any electrical switch or use any phone or radio in the vehicle.
● Do not start the vehicle’s engine or electric generator.
● Contact the nearest gas supplier or certified service technician for repairs.
● If you cannot reach a gas supplier or certified service technician, contact the nearest
fire department.
● Do not turn on the gas supply until gas leaks have been repaired.

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Table of Contents
Table of Contents .................................................................................................
General Safety ...................................................................................................
Product Overview & Features ............................................................................
Installation & Operation ..................................................................................
Wiring Diagram ...................................................................................................
Check After Installation ..................................................................................
Operation Instruction .....................................................................................
Winterizing Opration ......................................................................................
Troubleshooting .............................................................................................
2
3-5
6-9
10-29
29
30-31
32-34
34-37
39-42

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General Safety
User safety information
About safety symbols and signal words
Indicates an imminently hazardous situation which, if not avoided, will result in
death or serious injury.
DANGER: Indicates a hazardous situation which, if not avoided, will result in death
or serious injury.
WARNING: Indicates a hazardous situation which, if not avoided, could result in
death or serious injury.
CAUTION: Indicates a hazardous situation which, if not avoided, could result in
minor or moderate injury.
NOTICE: It is used to address practices not related to physical injury.
Intended use
● The unit may be used only to heat water in recreational vehicles (RVs) that are used
for recreation, travel, or camping.
● RVs are recreational vehicles designed as temporary living quarters for recreation,
camping, or travel use. Such vehicles have their own power or are towed by another
vehicle.
Examples of prohibited use
● Use in food trucks or roadside food vending vehicles.
● Use in construction trailers.
● Use as a pool heater.
● Use in a marine environment.
● Use as part of a space heating system.
● Use in mobile homes.
California proposition 65
Lists of chemical substances are known to the state to cause cancer, congenital
disabilities, death, serious illness, or other reproductive harm. This product may contain
such substances or such substances may be formed from combustion of fuel (gas) or
be components of the product itself.
Prohibited use
● Any use other than the intended use (see above) is prohibited.

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Responsibilities of operator
● The operator is responsible for their own health and safety, persons with
pacemakers should discuss this with their doctor before opening the access
door, or performing any service repairs.
● The operator is responsible for the water quality used in the appliance.
● The operator is responsible for all routine inspections found in the Cleaning and
Maintenance section of this manual.
● The operator is responsible for using and maintaining gas cylinders as
specified by the RV manufacturer.
● The operator is responsible for ensuring no spray water enters the appliance
when cleaning the RV.
● The operator is responsible for using the appliance for potable water only. They
are responsible for ensuring non-potable water sources, components, or
heating systems, new or old, are not connected to the appliance.
Important safety instructions
● Read these instructions carefully to ensure the safe and correct operation of
your appliance. Retain the instruction manual and installation instructions for
future use.
Ensuring a safe operating environment
● Read these instructions carefully to ensure the safe and correct operation of
your appliance. Retain the instruction manual and installation instructions for
future use.
DANGER
Suffocation or Fire Hazard
● Exhaust gases are hot and contain carbon monoxide, do not breath or obstruct the
exhaust gases.
● Failure to follow the instruction will lead to serious injury, property damage, or death.

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● NEVER use this appliance in enclosed spaces or tents.
● ALWAYS turn the appliance off, and shut off the fuel supply while parking the
RV in an enclosed space, such as a garage or repair shop.
● NEVER place seating or picnic tables in the direct path of the exhaust outlet.
● DO NOT use this water heater without a working carbon monoxide detector
installed in the RV. Follow the manufacturer's instructions and
guidelines for its installation.
● ALWAYS keep the air intake and exhaust outlet free of obstructions in order to
ensure clean combustion.
● DO NOT place articles on or against the appliance.
● DO NOT lean any objects against the water heater’s access door or place any
foreign objects within 24" of the access door.
● DO NOT use or store flammable materials near the appliance.
● DO NOT spray aerosols in the vicinity of the appliance while it is in operation.
● DO NOT modify the appliance.
While Driving
● The operator is responsible for ensuring all components are seated and locked
in place before moving the RV, check the following:
The access door is flush with the mounting plate. The door locker is engaged.
● The operator is responsible for ensuring the gas system is turned off at the gas
cylinders before transit. Turn off all necessary valves as indicated by the RV
manufacturer.
● The operator is responsible for making sure the appliance is off when refueling,
traveling through tunnels, parking in garages or carports, or on ferries.

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Product Overview & Features
Product overview
2. Rotate the handle 90
degrees angle.
3. Open the door.
1. Lift the handle by finger.
How to open the door?
Access door
Exhaust vent
Door locker
Air intake
Door hinge

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Wall controller
Connection for water and gas supply
Door fixing frame
Back cover
Wires connection
Water outlet (NPT1/2")
Water inlet (NPT1/2")
Gas inlet (5/8"-18UNF)
Burner burning symbol Temperature
Water flow
Gallons per minute
Temperature increase
Temperature reduction
Water flowing symbol
Fan blowing symbol
Power switch button
Power light
Temperature unit
switch button

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Product safety features
The appliance is equipped with the following safety devices:
● Flame monitoring device
If the flame goes out, the gas supply to the burner is switched off by the device.
● Anti-freeze function
The appliance is equipped with an anti-freeze device, when the outdoor
temperature drops below freezing the unit will automatic heating the water
system to 48 degrees Fahrenheit then the unit will stop (Note: Need to turn on
the power and gas supply during the anti-freeze time).
● Power positive and negative wires reverse protection
If the wires of the powerful positive and negative connection are reversed, the
unit will cut off the power to protect the PCB.
● Low-voltage/over-voltage shutdow
If the voltage drops below 10V DC (or rises above 17V DC), the appliance
shuts off.
● Over-current protection
If there is a short circuit in the appliance (>10 A), a fuse on the control unit is
activated and the appliance is switched off.
● Hot water temperature monitoring
A water over-temperature switch avoids excessively high water temperatures in
case of an error.
● Flue fan monitoring
If there is a failure of the flue fan, the gas supply to the burner is switched off.
● Temperature fluctuation eliminator
The appliance is equipped with a temperature fluctuation eliminator. If the
water flow is suddenly decreased to a small flow (0.4 GPM) that will cause a
high rise temperature, the fluctuation eliminator can eliminate the rising
temperature to avoid scalding injuries, and make sure the bather gets
comfortable bath.
● Over pressure protection
The appliance is equipped with a pressure relief valve that complies with the
standard for Relief Valves for Hot Water Supply Systems, ANSI Z21.22.

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Product basic function
The appliance was designed exclusively for use in recreational vehicles. The
appliance is connected between the vehicle’s fresh water supply and its hot water
plumbing system.
Based on the hot water demand, the tankless water heater will heat incoming cold
water to the desired output temperature by monitoring key sensors to regulate the
thermal energy released over a large heat exchanger. This creates a more useful
and energy-efficient heating system versus the conventional tank water heater
that wastes fuel during re-heat cycles and is limited on volume output.
Product specifications
BTU/HR (Nominal input rate)
Hot water capacity (Gallon/m, @ △45°F)
Fuel type
Fuel inlet pressure
Manifold pressure
Power input
Water operating pressure
Burner orifice (mm)
Working altitudes: 0 2000ft (0~610m)
Product dimensions (W x H x D)
Assembly (body and door) dimensions (W x H x D)
Installation cutout and depth dimensions (W x H x D)
Shipping weight (lbs/kg)
Setting temperature range
65,000 BTU
2.64
Propane (LP Gas)
10.5 in.wc-14 in. wc / 2620Pa-3490Pa
0.85 in.wc-6.4 in.wc / 210Pa-1600Pa
12V DC<3 Amp
10 PSI-65 PSI
5 x Ø1.2
Manifold Pressure (Pa) 1600
12.6″ x 12.5″ x 14.74″
Body with Door 15.2″ x 15.1″ x 15.4″
12.8″ x 12.7″ x 19.7″
29.8/13.5
95°F (35°C)~124°F (51°C)
Specifications

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Installation & Operation
What is in the box?
Remove the product from the packaging and make sure you have the following
list of items included. If any item is damaged or missing, contact us or the dealer.
WARNING
Suffocation Hazard
Dispose of packaging material or keep it from the reach of small children.
Failure to follow instructions could lead to serious injury or death.
Water Heater
Main body
Wall controller
Door assembly
ST4.2x30 screws (door fixing)
ST4.2x20 screws (controller fixing)
Wire connectors
Use and care manual
Warranty card
1
1
1
14
2
6
1
1
Part Description Quantity

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Installation
Read, observe, and follow these safety instructions to avoid injuries during
installation or operation.
Installation safety
The installation of this appliance, along with all subsequent components to support
the installation and operation of the appliance, must conform to country, state, and
local codes. In the absence of such codes, refer to the latest editions of:
● Any Installation must be performed by a qualified person in accordance with
this instruction manual.
● DO NOT use test pressures higher than 40in-WC (1.45PSI) to test the gas leaks.
● DO NOT attempt to modify the appliance.
● DO NOT alter the appliance for a positive grounding battery system.
● DO NOT move the appliance by grabbing the interior components.
● Make sure all exhaust gases are directed outside the RV.
● Protect all combustible material from the exhaust gases.
● DO NOT draw air for combustion from occupied spaces.
USA:
NFPA 1192 - Recreational Vehicles (RV)
● ANSI A119.5-Park Model RV
● ANSI/RVIA LV-Low Voltage Standard
● NFPA 70-National Electric Code
Canada:
● CSA Z240 RV Series-Recreational
Vehicles
● CSA Z241 Park Model RV
● CSA C22.1-Canadian Electric Code
CAUTION
Always wear protective gear such as
gloves eyewear and clothing to avoid
injuries during installation and service
of the appliance.
DANGER
Suffocation and/or Fire Hazard
Observe all installation material in accordance
with governing codes and ordinances. Failure
to the following instructions will result in
serious injury, property damage, or death.
WARNING
Electrical Shock and/or Fire Hazard
Disconnect power before installation.
Turn off all gas to the supply system.
Failure to do so can result in serious
injury or death.

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● Always disconnect the 12V appliance (to protect the control from surges that
may occur) when performing Dielectric (hi-pot) testing, welding, electrical, and
work on the coach.
● Only use with a proven 12V power source such as battery or approved
converter.
● DO NOT vent the water heater using a venting system serving another
appliance.
● DO NOT install directly into a shower, or near direct heat.
● DO NOT use a battery charger to supply power to the appliance, even when
testing.
Installation location requirements
Select a suitable location for your appliance fixing. The appliance is designed to
be installed on a floor or a fixed platform with access to water. Electrical
connections are established at the back. Gas access, water inlet, and hot water
outlet connections are from the rear also.
The appliance is designed exclusively for installation on an OUTSIDE WALL of
an RV.
Installation of the alter heater on the back of a trailer is not advised because of
high pollution caused by dirty and wet roads.
● DO NOT vent the water heater using a venting system serving another
appliance.
● DO NOT install the appliance in any location where the vent may be covered
or obstructed when any door on the RV is opened or due to the design of the
RV or due to special features of the RV such as slide-out, pop-up, etc.
● DO NOT install on a swing door.
● DO NOT install the appliance in such a way that the cover plate is less than
– 1 foot from each side and top of any window, slide-out, or opening into the RV.
– 6 feet from any mechanical air supply inlet
– 3 feet from any gas tank connection or ventilation.
● Maintain a minimum clearance from combustible materials on sides (4 in), top
(4 in), floor (0 in) and rear (0 in).
● Provide room for access to rear of appliance for servicing.
WARNING
Risk of poisonous exhaust gases due to improper installation!
● Make sure that the appliance is installed as described below.

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Electric drill
Bit size: 1/16"(3mm)
Note: It is use for holes drilling of exterior sheet metal of RV.
Hole saw size: 3/4"(19mm), for wall controller wires hole openning.
Note: It is used for the hole of the wall controller wires perforation.
Wire stripper pliers
Crimping tool
Adjustable wrench x 2
Tape measure
Pencil
Phillips screwdriver
Flat blade
Cutting knife
Saw
Sealant gun
Gloves
Tools Description
Tools required (not provided)

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Preparing the installation site
(a) Make sure that the appliance is in contact with the vehicle or a platform with
adequate weight-bearing capacity when install.
CAUTION
Sharp edges can cause cuts and injury!
Always wear protective gear such as gloves to avoid injuries from sharp
edges during installation work and while handling the appliance.
A
B
C
Water heater RV out wall
Solid frame
4-corner
no radius
Solid floor
or platform
(b) To install on a carpeted area, install a metal or wood panel under the appliance
that extends at least 3" beyond the width and depth of the appliance.
(c) If escaping water may damage components or the vehicle, install a collection
of the pan below the appliance, direct the flow of water from the pan to outside
the vehicle
Prepare cutout opening
(a) Make sure that the front edge of the opening is surrounded by a solid frame to
firmly anchor the appliance. If needed, build an appropriate frame with the
following dimensions:
Width A = 12.75in.
Height B =12.75in.
Depth C＞20in.
Installation plan 1
Down edge of the opening is level with the floor.

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(b) The required depth “c” depends on how the water hoses, electrical connection
cable, and gas line are installed. The depth “c” must be determined for the
particular situation before installation.
(c) The corners of the rough opening must be at right angles. The exterior wall
opening must be the same dimensions with no rounded corners.
(d) If necessary, create a platform to support the water heater. Below pictures are
some common solutions. Ensure the platform is level front to back, and side to
side after securing to the RV.
Installation plan 2
Down edge of the opening is higher than flooring with one wooden mat.
Note: This cutout size it can replace the Atwood 6-gallon and Suburban 6-gallon tank water heaters.
Cutout dimension on the out wall of the RV
A
12.75″
B
12.75″
C
Min.20″
7"-8"
Wooden mat
Flush platform
(same high)
No radius
RV flooring

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Installation plan 3
Down edge of the opening is higher than flooring with two wooden mat.
Check the opening size if suitable for the appliance after finished.
Slide the appliance into the cutout opening. If cannot slide in, check the size if
correct, and check if the corners have radius. It must be no radius.
Slide
Flush platform (same high)
6"-8"
No radius
Wooden mat
(flooring)

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● Fuel entering the appliance must be in the gas phase, the liquid phase must
not be used, and will result in damage to the product.
● This appliance is rated for 65,000 BTU/HR, 11~14in-WC. (2740~3490Pa).
Follow NFPA1192 and Z240 RV series for proper pipe sizing based on
additional gas-burning appliance loads.
● Use with LP gas (propane) only. Butane or any mixtures containing more than
10% butane must not be used.
● The gas line must terminate with a ⅜" flared female compression fitting to
connect with the rear gas connector of the appliance.
● A non Metallic Flexible gas hose must be rated for 149°F (65°C). Anchor
appropriately to prevent fatigue and failure from wear edges.
Prepare utilities
1. Gas supply and connection
DANGER
Fire or Explosion Hazard
● Follow all applicable codes, regulations, and instruction material when
performing service work.
Failure to follow instructions will result in product damage, serious injury, or death.
20lb gas cylinder
5/8"-18UNF Connector
2. Gas plumbing

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● Make sure that the operating pressure of the gas supply corresponds to the
operating pressure of the appliance 11~14in-WC (2740~3490Pa).
(a) Locate the entry point for the plumbing to service the rear of the appliance.
Ensure the entry point is not in the footprint space of the appliance.
(b) Feed gas line into proximity, leave enough length to flex into position so that
when connected no kinks are created.
NOTE: An approved semi-flexible metallic pipe is acceptable to connect as an
extension from the gas line to the appliance.
(c) Terminate gas line with fittings to connect to the appliance.
3. Water plumbing
The water plumbing system must be rated to supply between 35-70PSI nominal.
Connections can be made using PEX swivel nut adapters with NPT straight
thread and a cone seal or with a standard ½" FNPT fittings. If use a standard ½"
FNPT fittings for coonection, we suggest you to buy a joint with bottom face seal
(refer to below right side picture), if not, you should buy some Teflon taps for
sealing.
4. Fittings for water inlet and outlet
PEX 1/2" NPT swivel nut
Cone seal rubber
1/2" FNPT fitting
Seal gasket

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5. Water plumbing for RV water heater
6. Wires connection cautions and diagram
WARNING
Electrical shock hazard
● Disconnect all power before performing any work.
● Always use a certified and proven 12V isolated power supply, that is
properly grounded to the RV.
● Follow all applicable codes, regulations and instruction material when
performing service work.
● Failure to follow instruction could result in serious injury or death.
* Bypass kit(A,B,C) for winterizing (not in scope of delivery).
Shower Faucet 1 Faucet 2
Pump
Gas cylinder
Propane
Gas regulator
Use PEX 1/2" NPT swivel fittings
to connect water inlet and outlet
(recommend).
Water tank
A*
B* C*
● Wiring connected to or in proximity of the appliance must be rated for 140°F
(60°C) minimum.
● Use only insulated terminals for all electrical connections.
● The appliance requires a power source that can adequately provide 10~17V
DC to function properly.
(a) Select a distribution branch greater than 3A, preferably 15 amp, to provide
nominal 12V to the appliance from the distribution panel.
NOTE: The appliance has a built in 10A fuse, serviceable from the front of the
product. The appliance can be on a dedicated or shared branch circuit with the
same or higher rating.