Munster Simms Engineering Ltd. Whale Expanse WW0801U Guide

INSTALLATION AND
USER INSTRUCTIONS
Whale®Expanse™
Gas & Electric
Water Heater
More Heat, More Space, More Control*
Thank you for purchasing this Whale® product. For over 60 years Whale has led the way in the design and manufacturer
of water and waste systems including:-plumbing, faucets, showers, pumps and heating for mobile applications. Today’s
range features space and water heaters for caravans and motorhomes. The company and its products have built a
reputation for quality, reliability and innovation backed up by excellent customer service.
For information on our full product range visit: www.whalepumps.com
* More Heat, More Space, More Control compared to previous Whale Heating System Models
Model Number Suffix Description
Underfloor Installation Models
WW0801U B or R or C Underfloor Gas and Electric Water Heater (Install with Whale® Water Heater Control Panel)
IW0801U B or R or C Underfloor Gas and Electric Water Heater (Install with Whale iVan® Control Panel)
DW0801U RUnderfloor Gas and Electric Water Heater (Install with Whale® Duo Control Panel)
Onboard Installation Models
WW0801O B or R or C Onboard Gas and Electric Water Heater (Install with Whale® Water Heater Control Panel
IW0801O B or R or C Onboard Gas and Electric Water Heater (Install with Whale iVan® Control Panel)
DW0801O R Onboard Gas and Electric Water Heater (Install with Whale Duo Control Panel)
Suffix Description
BBulk Packaging
RReturnable Packaging
CCommercial Packaging
All work must be carried out by a competent person as defined by
BS7671 PART2.
All Whale gas products must be installed by a Qualified Gas Engineer in
accordance with the installation instructions and BS EN 1949-2011.
Please note if incorrectly installed a risk of electrocution exists.

CONTENTS
1. Principles of Operation
2. Specification
3. Application
4. Warnings
5. Parts List
6. Instructions for Installation
7. Instructions for Use
8. Maintenance
9. Trouble Shooting
10. Winterising and Draining
11. Service Support Details
12. EU Declaration of Conformity
13. Patents and Trademarks
14. Warranty
LIST OF IMAGES
Fig. 1 Components Drawing
Fig. 2 Dimensions – Underfloor Models Front View
Fig. 3 Dimensions – Underfloor Models Plan View
Fig. 4 Dimensions – Underfloor Models Side View
Fig. 5 Dimensions – Onboard Models Front View
Fig. 6 Dimensions – Onboard Models Plan View
Fig. 7 Dimensions – Onboard Models Side View
Fig. 8 Installation Locating Diagram - Underfloor Installation
Fig. 9 Cut Out Hole in Floor - Underfloor Installation
Fig. 10 Fit Mounting Bolts - Underfloor Installation
Fig. 11 Fit Water Heater - Underfloor Installation
Fig. 12 Secure Mounting Bolts - Underfloor Installation
Fig. 13 Attach Exhaust Flue - Underfloor Installation
Fig. 14 Attach Combustion Air Flue - Underfloor Installation
Fig. 15A Attach Flue to Flue Terminal - Step One
Fig. 15B Attach Flue to Flue Terminal - Step Two
Fig. 15C Attach Flue to Flue Terminal - Step Three
Fig. 16 Attaching Flue Terminal to the Vehicle - Underfloor Installation
Fig. 17 Flue Direction - Underfloor Installation
Fig. 18 Attaching Flue Brackets - Underfloor Installation
Fig. 19 Installation Locating Diagram - Onboard Installation
Fig. 20 Cut Out Hole in Floor - Onboard Installation
Fig. 21 Attach Exhaust Flue - Onboard Installation
Fig. 22 Attach Combustion Air Flue - Onboard Installation
Fig. 23A Attach Flue to Flue Terminal - Step One
Fig. 23B Attach Flue to Flue Terminal - Step Two
Fig. 23C Attach Flue to Flue Terminal - Step Three
Fig. 24 Attaching Flue Terminal to the Vehicle - Onboard Installation
Fig. 25 Flue Direction - Onboard Installation
Fig. 26 Attaching Flue Brackets - Onboard Installation
Fig. 27 Position Water Heater on the Floor - Onboard Installation
Fig. 28 Secure Water Heater to the Floor - Onboard Installation
Fig. 29 Connect to the Gas Supply
Fig. 30 Mains Electrical Connection
Fig. 31 Connect Cold Water Supply
Fig. 32 Connect Hot Water Supply
Fig. 33 Completed Installation - Underfloor Models
Fig. 34 Completed Installation - Onboard Models
Fig. 35 Whale® Water Heater Control Panel
Fig. 36 Whale Duo Control Panel
Fig. 37 Whale iVan® Control Panel
Fig. 38 Drain Valve Operation
2

The Whale® Expanse™ Water Heater is a gas and electric storage Water Heater. Expanse™ can be installed
internally, inside the vehicle or externally, under the vehicle. The unique design has an 8 litre capacity hot water tank
which incorporates versatile controls to deliver low current draw or fast heat up settings. With robust insulation and
no removable flue cover, the Whale® Expanse™ Water Heater only requires minimal maintenance.
Read the following carefully before installation
Model: WW0801U or IW0801U or DW0801U / WW0801O or IW0801O or DW0801O
WW0801U (Suffix: B or R or C) or IW0801U (Suffix: B or R or C) or DW0801U (Suffix: R)
Maximum dimensions inside vehicle:
Height: 180mm (underfloor), Width: 262mm, Length: 522mm, Dry Weight: 4.5kg
WW0801O (Suffix: B or R or C) or IW0801O (Suffix: B or R or C) or DW0801O (Suffix: R)
Maximum dimensions inside vehicle:
Height: 252mm, Width: 280mm, Length: 522mm, Dry Weight: 4.5kg
Nominal Water Capacity 8 litre
Gas: Butane/Propane 30mbar - CAT I3B/P (30)
Classification of Storage Water Heater: Type: C13
Nominal Heat Input: Gas 1.35kW
Standby Consumption: Gas 43W
Nominal Heat Input Electric 1.5kW
Electric: 230V a.c. 50 Hz 750/1500W
Maximum Current a.c: 6.5 amps
Nominal Voltage: 12V d.c. (10.1 Volt d.c. min. to 14.9 Volt d.c. max.)
Maximum Current d.c: 0.48 Amps (0.03 Amps on standby)
Maximum Water Supply Pressure: 190kPa (1.9 Bar)
Rated Pressure: 300kPa (3.0 Bar)
Pressure Relief Valve Setting: 300kPa (3.0 Bar)
Maximum Caravan Floor Thickness: 47mm
Ingress Protection Rating: IP45
Note: If connecting to mains water supply, a suitable water pressure regulator must be connected to ensure that the
maximum supply water pressure does not exceed 190kPa (1.9 Bar).
Dry Storage Temperature: -20°C to 70°C
Maximum Water Temperature: Approx. 72°C
Typical heating up times from 15°C to 70°C:
Gas and 1.5kW Electric approx. 15 minutes. 1.5kW Electric (two electric elements only) approx. 24 minutes.
Gas only approx. 26 minutes.
For use only in road vehicles i.e. caravans and motorhomes only. Not suitable for caravan holiday homes i.e. mobile
homes or static caravans.
The Water Heater position must allow access for servicing and to the reset button.
Whale’s policy is one of continuous improvement and we reserve the right to change specifications without prior
notice.
2. SPECIFICATION
1. PRINCIPLES OF OPERATION
3

The Whale® Expanse™ Water Heater has been designed for caravan, motorhome and mobile applications, and is
suitable for small and medium sized recreational vehicles only. It is only suitable for use in recreational vehicles i.e.
caravans and motorhomes, but is not suitable for use in caravan holiday homes e.g. mobile homes and static
caravans.The compact and lightweight 8L tank can be fitted under the floor or internally and has a variety of power
input for rapid heat up times.
This symbol indicates that this appliance is suitable for use in Leisure Accommodation Vehicles.
This symbol indicates that this appliance is not suitable for use in boats.
Observe all warnings.
In the unlikely event of leaks in the gas system, or if there is a smell of gas:
• Extinguish all naked flames
• Switch off all appliances and do not operate any electrical switches
• Turn off all gas appliances
• Open windows and doors for ventilation
• Do not smoke
• Shut off gas connection
Immediately ensure that the system is thoroughly checked by a Whale® Authorised Dealer or Whale® Approved
Service Engineer.
The Water Heater must not be operated in the following situations:
• When refuelling the vehicle or refuelling the vehicle towing the caravan or any other appliance.
• When the vehicle in which the Water Heater is installed is in motion.
• When the vehicle in which the Water Heater is installed in a confined space (such as a garage).
This appliance can be used by children aged from 8 years and persons with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, if they have
been given supervision or instruction concerning use of the appliance in a safe way and
understand the hazards involved. Children must not play with the appliance. Cleaning and
user maintenance must not be carried out by children without supervision.
Before Operation: Ensure the caravan water system, including the Water Heater is full of water, and that the vehicle
is level before operating the Water Heater.
This appliance must be fully drained if there is a risk of frost. Only when the Frost Protection setting is turned on and
activated, the Water Heater does not have to be drained.
Please note:The Frost Protection setting is only recommended for a period of 3 days or less. If the vehicle will not
be in use for longer than 3 days, the water system must be fully drained.
Please note:The user must ensure that Frost Protection is turned on, activated and remains in operation for the
duration for its period of use. Frost damage will not be covered by warranty.
The water temperature cannot be adjusted. It is automatically set to approximately 70°C (or 55°C if eco mode is
available and set) and controlled by the PCB to prevent bacteria growth. To avoid scalding, the temperature of the
hot water supplied to the taps and showers must be controlled at the tap or shower. Do not use the water as
drinking water.
Any alteration to the appliance, including flue and flue cover, use of non-Whale® spare parts/accessories and
non-observation of the installation and operation instructions shall lead to cancellation of the warranty and exclusion
of liability claims and results in it becoming illegal to use the appliance.
Please note: Incorrect installation or use of non-original Whale® parts may invalidate the warranty. It also becomes
illegal to use the appliance if incorrectly installed, and in some countries this also makes it illegal to use the vehicle.
3. APPLICATION
4. WARNINGS
4

5. PARTS LIST
5
Onboard Mounted Models Underfloor Mounted Models
Water Heater 1
Water Heater with Mounting Feet 1
Braided Hose 11
Warranty Registration Card 11
Instruction Manual Including Installation Templates 11
To the Fitter:
Installation and servicing of this appliance must only be carried out by competent persons registered with the Gas
Safe Register (GB) or the relevant national organisation, in accordance with the relevant regulatory and safety
requirements.
Before installation, ensure the appliance has been supplied in good condition and if damaged do not install
and contact Whale® Support [phone].
A competent person must install the appliance in accordance with the appliance installation instructions. This
appliance is for use with LPG (see appliance data plate) and mains electricity (230V a.c.) only. You must check that
the product is suitable for the intended application. In particular, the installer must check the compatibility of the data
plate information with the LPG supply requirements of the vehicle. Follow these installation instructions and ensure
that all relevant personnel read the points listed below. Also ensure that these operating instructions are passed on to
the end user.
Please note: The appliance must be installed in accordance with any relevant regulations in the country where the
appliance is installed. For this appliance in Europe, the standard is BS EN 1949:2011 “Specification for The
Installation of LPG Systems for Habitation Purposes in Leisure Accommodation Vehicles and Accommodation In
Other Road Vehicles” applies.
Braided Hose 12mm
Cold Inlet Seal
Drain Valve Lever
Box Lid
Cold Inlet 12mm
Hot Elbow 12mm
Pressure Relief
Overheat Stat
Control Thermistor
Burner Assembly
Flue Seal Bush
Condensate Drain Ball
Solenoid Seal
PCB
Electric Elements
Tank Casing
Insulation
Tank
Cable Clamp
Wireless PCB
Wireless PCB Cover
Fig.1 Components Drawing
6. INSTRUCTIONS FOR INSTALLATION
Note DW models:
A reset module is supplied
instead of a wireless PCB

6
Fig. 2 Dimensions – Front View Underfloor
Fig. 3 Dimensions – Plan View Underfloor
DIMENSIONS
Underfloor Models
Whale Part Number: WW0801U (Suffix: B or R or C) or IW0801U (Suffix: B or R or C) or DW0801U (Suffix: R)
Fig. 4 Dimensions – Side View Underfloor
262mm
216mm
240mm
59mm 59mm
270mm
49mm
229mm
180mm
496mm
522mm
Cold Water In
Drain Lever / Pressure Relief Valve
Gas In
Exhaust Outlet
Cold Air Inlet
Water Heater
Mounting Point
Mounting Point
Hot Water Out
Cold Water In

7
Fig. 5 Dimensions – Front View Onboard
Fig. 6 Dimensions – Plan View Onboard
DIMENSIONS
Onboard Mounted Models
Whale Part Number: WW0801O (Suffix: B or R or C) or IW0801O (Suffix: B or R or C) or DW0801O (Suffix: R)
Fig. 7 Dimensions – Side View Onboard
262mm
!, "- 2
232mm
60mm
270mm
49mm
229mm
180mm
496mm
522mm
Cold Water In
Drain Lever / Pressure Relief Valve
Gas In
Exhaust Outlet
Cold Air Inlet
Onboard Mounting Feet
Condensate Drain Pipe
Water Heater
18mm
280mm
252mm
Hot Water Out
Cold Water In
262mm
280mm

INSTALLATION INSTRUCTIONS - UNDERFLOOR MODELS
Whale Part Numbers: WW0801U (Suffix: B or R or C) or IW0801U (Suffix: B or R or C) or DW0801U (Suffix: R)
Step 1 Find Suitable Location For Water Heater Installation
Consider the following 9 points:
i. For weight distribution in caravans, the Water Heater must be positioned as close to the axle as
possible. The installer must avoid locating the Water Heater at the very rear and the very front of the
vehicle.
ii. The Water Heater must be located between chassis members to protect it from the curb.
The chosen location must ensure that the Water Heater is protected by chassis members which
must be at least 180mm deep.
iii. Any surfaces in contact with the Water Heater must be rated to at least 70 degrees C.
iv. The location must allow access for servicing the Water Heater.
v. The flue terminal must be located at the side of the caravan. Acceptable flue lengths are,
0.75 metres,1.25 metres and 2 metres.
vi. The flue terminal must be positioned at the side of the vehicle, that an awning will never be fitted to.
vii. Only the Whale flue terminal (supplied with this Water Heater) is permitted to be used in conjunction
with this Water Heater. This flue must not be positioned within 500mm of a refuelling point or fuel
tank breather outlet or any ventilator from the fuel system(s). The flue terminal must not be fitted
within 300mm of a ventilator for the living space or an opening part of a window.
viii. The flue terminal must only be positioned vertically below an opening part of a window, if the
appliance is fitted with an automatic shut-off device to prevent operation when the window is open.
The flue terminal must be a minimum of 300mm below the window.
ix. If supplied with a reset button, the user must have access to it in order to be able to clear some
lockouts.
Fig. 8 Installation Locating Diagram - Underfloor Installation
Step 2 Cut Out Hole for Underfloor Water Heater
The cut out in the floor and hole positions are shown in Fig. 9.
A cut out template is available on request by contacting Whale on [phone].
8
Fig. 9 Cut Out Hole in Floor - Underfloor Installation
Fuel refuelling
/ breather vent
PLEASE NOTE: Step i to ix
for information on Water
Heater and Flue Locations.
KEY
Prohibited area for
Water Heater flue
9mm Bolt Holes
9mm Bolt Holes
9mm Bolt Holes
9mm Bolt Holes
Cut Out In
Vehicle Floor
227.5mm
216mm
Min 500mm

INSTALLATION INSTRUCTIONS - UNDERFLOOR MODELS
Whale Part Numbers: WW0801U (Suffix: B or R or C) or IW0801U (Suffix: B or R or C) or DW0801U (Suffix: R)
The vehicle floor cut out must be reinforced with wooden batons (minimum 22mm wide, not supplied) around the
edge of the vehicle floor cut out. The floor in the area of the flat headmounting bolt holes must also have wooden
batons built in.
Step 3 Fit The Water Heater to The Floor
i. Insert 8mm flat head mounting bolts (not supplied) through the 9mm holes in the floor from the
inside, (as shown in Fig 10).
ii. Place the Water Heater on the underside of the vehicle floor. The mounting bolts must pass through
the mounting points, (as shown in Fig. 11).
iii. Secure the mounting bolts with M8 serrated flange head nuts (not supplied).
9
Fig.10 Fit Mounting Bolts
Fig. 11 Fit Water Heater
Fig. 12 Secure Bolts
8mm Bolt
8mm Bolt
Cut Out In
Vehicle Floor
9mm Bolt Holes
9mm Bolt Holes
Vehicle Floor
8mm Flathead Mounting Bolts
8mm Flathead Mounting Bolts
Cut Out In
Vehicle Floor
Flathead Mounting Bolts
9mm Bolt Holes
Mounting Points
Water Heater
Mounting Points
Water Heater
M8 Serrated Flange Head Nuts
Underside Vehicle Floor
Underside Vehicle Floor

INSTALLATION INSTRUCTIONS - UNDERFLOOR MODELS
Whale Part Numbers: WW0801U (Suffix: B or R or C) or IW0801U (Suffix: B or R or C) or DW0801U (Suffix: R)
Step 4 Connect Water Heater to Flues
i. Attach the exhaust flue to the Water Heater by pushing over the flue exhaust outlet on the
Water Heater. The flue will push into the red sealing bush by 20mm. Turn the flue clockwise until
the clip locks in place behind the plastic cover of the Water Heater. Check that the flue is locked in
place by gently pulling the flue away from the Water Heater. The flue is locked in place when it does
not come away from the Water Heater when gently pulled.
ii. Fit the combustion air flue to the Water Heater by sliding it over the exhaust flue and then connect to
the Water Heater (as shown in Fig. 14).
iv. Push the exhaust flue into the rear of the flue terminal (fitted to the vehicle floor) until it will go no
further, approximately 50mm.The flue must be pushed fully home. Please see Figs. 15A, B and C.
iv. Push the inlet flue into the rear of the flue terminal (fitted to the vehicle floor). The flue must be
pushed fully home. Please see Figs. 15. The flue must be visible in the flue terminal.
Water Heater
Exhaust Flue Outlet
Cold Air Inlet
Exhaust Flue
Exhaust Flue Combustion Air Flue
Fig. 13 Attach Exhaust Flue
Fig. 14 Attach Combustion Air Flue
Fig. 15A Attaching Flue To Flue Terminal
Exhaust Flue
Combustion Air Flue
Flue Terminal
Fig. 15B Attaching Flue to Flue Terminal
Combustion Air Flue
Flue
Terminal
Fig. 15C Attaching Flue to Flue Terminal
Flue
Terminal
10
Visible Flue
in Flue
Terminal

INSTALLATION INSTRUCTIONS - UNDERFLOOR MODELS
Whale Part Numbers: WW0801U (Suffix: B or R or C) or IW0801U (Suffix: B or R or C) or DW0801U (Suffix: R)
Step 5 Attaching the Flue Terminal to the Vehicle
A wooden spacer may be required to locate the flue terminal below the side valence. Attach the flue terminal with 2 x
No.8 x ¾” pozi screws (not supplied). The flue terminal must be at the side of the vehicle, where an awning will
never be fitted to.
Please note: The flue duct from the Water Heater to the terminal must have a maximum of one rise. As shown by
point A in Fig. 17. This allows condensation to drain away from the Water Heater.
The flue must be attached to the underside of the vehicle floor with the two brackets supplied. Clip the bracket
around the flue and use two screws (No.8 x ¾”) to secure each bracket to the underside of the vehicle floor as per
Fig.18.
For Step 6, please proceed to page 16.
11
Fig. 16 Attaching the Flue Terminal to the Vehicle
Screws
Flue
Wooden
Spacer
Side Valence
Water Heater
Flue
Vehicle Floor
Fig. 17 Flue Direction
Fig. 18 Attaching Flue Bracket
A
Flue
Bracket

INSTALLATION INSTRUCTIONS
ONBOARD MOUNTED MODELS
Whale Part Numbers: WW0801O (Suffix: B or R or C) or IW0801O (Suffix: B or R or C) or DW0801O (Suffix: R)
Step 1 Find Suitable Location For Water Heater Installation
Consider the following 8 points:
i. For weight distribution in caravans, the Water Heater must be positioned as close to the axle as
possible. The installer must avoid locating the Water Heater at the very rear and the very front of the
vehicle.
ii. Any surfaces in contact with the Water Heater must be rated to at least 70 degrees C.
iii. The location must allow access for servicing the Water Heater.
iv. The flue terminal must be located at the side of the caravan. Acceptable flue lengths are,
0.75 metres, 1.25 metres and 2 metres.
v. The flue terminal must be positioned at the side of the vehicle, that an awning will never be fitted to.
vi. Only the Whale flue terminal (supplied with this Water Heater) is permitted to be used in conjunction
with this Water Heater. This flue must not be positioned within 500mm of a refuelling point or fuel
tank breather outlet or any ventilator from the fuel system(s). The flue terminal must not be fitted
within 300mm of a ventilator for the living space or an opening part of a window.
vii. The flue terminal must only be positioned vertically below an opening part of a window, if the
appliance is fitted with an automatic shut-off device to prevent operation when the window is open.
The flue terminal must be a minimum of 300mm below the window.
viii. If supplied with a reset button, the user must have access to it in order to be able to clear some
lockouts.
Fig. 19 Installation Locating Diagram
Step 2 Cut Out Holes for Onboard Water Heater
The cut outs in the vehicle floor and screw hole positions are shown in Fig. 20.
*These cut outs can be located anywhere to the front of the Water Heater.
A cut out template is available on request by contacting Whale on [phone].
Fuel refuelling
/ breather vent
PLEASE NOTE: Step i to viii
for information on Water
Heater and Flue Locations.
KEY
Prohibited area for
Water Heater flue
12
Fig. 20 Cut Out Hole in Floor
Screw Holes
Screw Holes
*Drain Pipe
20mm Cut Out
In Vehicle Floor
Screw Holes
Screw Holes
130mm
88mm
270mm
260mm
Fixed Drain Pipe
20mm Cut Out
In Vehicle Floor
*Ducting
50mm Cut Out
In Vehicle Floor
* Please Note:
Cut outs can be
located any where to
the front of the Water
Heater. Please see
Fig. 28.
Min 500mm

INSTALLATION INSTRUCTIONS
ONBOARD MOUNTED MODELS
Whale Part Numbers: WW0801O (Suffix: B or R or C) or IW0801O (Suffix: B or R or C) or DW0801O (Suffix: R)
Step 3 Connect Water Heater to Flues
i. Attach the exhaust flue to the Water Heater by pushing over the flue exhaust outlet on the
Water Heater. The flue will push into the red sealing bush by 20mm. Turn the flue clockwise until
the clip locks in place behind the plastic cover of the Water Heater. Check that the flue is locked in
place by gently pulling the flue away from the Water Heater. The flue is locked in place when it does
not come away from the Water Heater when gently pulled.
ii. Fit the combustion air flue to the Water Heater by sliding it over the exhaust flue and then connect to
the Water Heater (as shown in Fig. 22).
iv. Push the exhaust flue into the rear of the flue terminal (fitted to the vehicle floor) until it will go no
further, approximately 50mm.The flue must be pushed fully home. Please see Figs. 23A, B and C.
iv. Push the inlet flue into the rear of the flue terminal (fitted to the vehicle floor). The flue must be
pushed fully home. Please see Figs. 23. The flue must be visible in the flue terminal.
Water Heater
Exhaust Flue Outlet
Cold Air Inlet
Exhaust Flue
Exhaust Flue Combustion Air Flue
Fig. 21 Attach Exhaust Flue
Fig. 22 Attach Combustion Air Flue
Fig. 23A Attaching Flue to Flue Terminal
Exhaust Flue Combustion Air Flue
Flue Terminal
Fig. 23B Attaching Flue to Flue Terminal
Combustion Air Flue
Flue
Terminal
Fig. 23C Attaching Flue to Flue Terminal
Flue
Terminal
13
Visible Flue
in Flue
Terminal

INSTALLATION INSTRUCTIONS
ONBOARD MOUNTED MODELS
Whale Part Numbers: WW0801U (Suffix: B or R or C) or IW0801U (Suffix: B or R or C) or DW0801U (Suffix: R)
Step 4 Attaching the Flue Terminal to the Vehicle
A wooden spacer may be required to locate the flue terminal below the side valence. Attach the flue terminal with 2 x
No.8 x ¾” pozi screws (not supplied). The flue terminal must be at the side of the vehicle, where an awning will
never be fitted to.
Please note: The flue duct from the Water Heater to the terminal must have a maximum of one rise. As shown by
point A in Fig. 25. This allows condensate to drain away from the Water Heater.
The flue must be attached to the underside of the vehicle floor with the two brackets supplied. Clip the bracket
around the flue and use two screws (No.8 x ¾”) to secure each bracket to the underside of the vehicle floor as per
Fig. 26.
14
Fig. 24 Attaching the Flue Terminal to the Vehicle
Screws
Flue
Wooden
Spacer
Side Valence
Vehicle Floor
Fig. 25 Flue Direction
Fig. 26 Attaching Flue Bracket
Flue
Bracket
Water Heater
AFlue
Please note: When
installing flues sharp
bends must be avoided
and the number of bends
must be minimised.

INSTALLATION INSTRUCTIONS - ONBOARD MOUNTED MODELS
Whale Part Numbers: WW0801O (Suffix: B or R or C) or IW0801O (Suffix: B or R or C) or DW0801O (Suffix: R)
Step 5 Fit The Water Heater to The Floor
i. Place the Water Heater on the vehicle floor, feed the attached flue, fixed drain pipe and
drain pipe through the cut out holes in the vehicle floor.
ii. Attach the Water Heater to the vehicle floor. The screws must pass through the mounting feet, as
shown in Fig. 28.
15
Fig. 27 Place the Water Heater On The Floor
Water Heater
Flue
Drain Pipe
Gas In
Flue Cut Out in Vehicle Floor
Vehicle Floor
Fixed
Drain
Pipe
Mounting Feet
Screw Hole
Mounting Feet
Screw Hole
Water Heater
Flue
Drain Pipe
Gas In
Flue Cut Out in Vehicle Floor
Vehicle Floor
Fixed
Drain
Pipe
Mounting Feet
Screw Hole
Mounting Feet
Screw Hole
Fig. 28 Secure the Water Heater To The Floor

INSTALLATION INSTRUCTIONS - ALL MODELS
Step 6 Connect to Gas Supply
Please Note: Ventilation must comply with relevant local requirements, e.g. EN 721. Gas Valve and connections are
to be supplied by the fitter. Adequate gas drop out vents must be installed in the vicinity of the gas connection.
The appliance must be installed in accordance with the installation instructions and must comply with any relevant
regulations in the country where the appliance is installed.
Check the gas pipe of the Water Heater and the main gas supply pipe to ensure it is clear from dirt or other
particles. Fit the gas supply to the compression fitting on the Water Heater. The supply pipe must be positioned to
ensure the Water Heater can be removed for servicing.
Gas shut- off valve must be located as close as possible to the Water Heater inside the vehicle and all connections
must be kept to a minimum.
WARNING: The operating pressure for the gas supply must be either 28-30mBar Butane or Propane.
Step 7 Electrical Connections 12V d.c.
Option 1 - Electrical Connections 12V d.c. when fitted with Whale® Water Heater Control Panel
Option 2 - Electrical Connections 12V d.c. when fitted with Whale® Duo Control Panel
Option 3 - Electrical Connections 12V d.c. when fitted with Whale® iVan® Wireless Control Panel
WARNING: Always disconnect the appliance from the power supply prior to working on electrical components. The
Water Heater comes complete with electrical connectors fitted.
Please note: A 5 Amp fuse must be fitted in the 12V d.c. supply.
Step 7 - Option 1 Installing With Whale® Water Heater Control Panel
The Whale® Water Heater and Control Panels are designed to be integrated into the caravan’s wiring loom. The
Water Heater is provided with a JST VH series 10 way socket, 7 wires are required to connect the Water Heater to
the Control Panel, plus 12V d.c. and 0V d.c. power supply. If a wiring loom is supplied, connect the red wire to
12V d.c. and the white wire to 0V d.c.
Table 1: Showing Electrical Connections when fitted with Whale® Water Heater Control Panel
16
Wire Number Description
112V d.c. supply
20V d.c. supply
3Switch common
4Lockout LED
5Burner LED
6Burner Switch
7Immersion 1 switch
8Immersion 2 switch
9 Blank
10 Frost protection switch
Fig. 29 Connecting Gas Supply
Flue Pipe
Mains Gas Supply Pipe

INSTALLATION INSTRUCTIONS - ALL MODELS
Step 7 -
Option 2 - Option 3 -
Installing With Whale® Duo Control Panel Installing With Whale® iVan® Wireless Control Panel
Table 2A: Showing Electrical Connections when Table 2B: Showing Electrical Connections when
fitted with Whale® Duo Control Panel fitted with Whale® iVan® Wireless Control Panel
Step 8 Electrical Connection 230V a.c.
The appliance must be installed in accordance with the installation instructions and comply with any relevant
regulations in the country where the appliance is installed. Electrical installation must be carried out by a suitably
qualified electrician. The electrical supply must be connected to a 10 amp fused spur (not provided) with an all-pole
disconnection and the appliance must be earthed.
If the supply cord is damaged, it must be replaced and fitted by Whale® personnel or by a Qualified Approved
Whale® Service Engineer.
Manufacturer Installation Example (see Fig. 30)
The Mains Supply Cable is supplied with a JST LP series socket (terminal pins are JST SLM-61T-2.0) and must be
mounted in a housing with strain relief to prevent accidental disconnection and to prevent access to the connector.
Step 9 Connection to Cold Water Supply (see Fig. 31)
The Water Heater is fitted with Whale® 12mm semi-rigid pipe on the cold water inlet. A Whale® 12mm straight
(Whale Part Number: WU1203) or 12mm elbow (Whale Part Number: WU1204) Quick Connect fitting must be used
to connect to the vehicles cold water supply. A suitable adaptor may be required depending on the plumbing system
used. Please note: A non-return valve (Whale Part Number: FV1300) must be fitted on the cold water supply.
17
Fig. 30 Mains Electrical Connection
Water Heater Wiring Loom
Protective Cover Protective Cover Lid
Fig. 31 Connect Cold Water Supply
Cold Water Inlet Pipe
Quick Connect
Fitting
Hot Water Braided Hose
Drain Valve
Wire Number Description
112V d.c. supply for Water Heater
20V d.c. supply
312V d.c. supply for pump
4Pump 12V d.c.
5Pump running light
6Pump 0V d.c
Wire Number Description
112V d.c. supply for Water Heater
2Burner switch
3Immersion 1 switch
4Immersion 2 switch
5Burner LED
6Lockout LED
7Frost protection switch
80V d.c. supply

INSTALLATION INSTRUCTIONS - ALL MODELS
Step 10 Connect Hot Water Supply (see Fig. 32).
To connect the hot water outlet to Whale® 12mm semi-rigid tubing, use the Whale® braided hose (supplied)
and a Whale® 12mm Equal Straight fitting (Whale Part Number: WU1204).
For connecting to 13mm (½”) flexible tubing use a Whale® braided hose supplied and an Equal Straight fitting
(Whale Part Number: WU1204) and ½” Stem Adaptor (Whale Part Number: WU1282).
To connect directly to 10mm (3⁄5”) flexible tubing, push the hose over the 12mm port on the end of the braided
hose and secure with a hose clip. Please note: Do not over tighten.
Please note: The hot water flexible braided hose must always be fitted to ensure safe operation.
If you have any other plumbing system, contact Whale® Support Team by telephoning [phone] for
further information.
Step 11 Completed Installation
This appliance must be installed in accordance with the installation instructions and in compliance with any relevant
regulations in the country where the appliance is installed.
Check the gas pipe of the Water Heater and the main gas supply pipe to ensure it is clear from dirt or other
particles. Fit the gas supply to the copper gas pipe of the Water Heater with a compression fitting. The supply pipe
must be positioned to ensure that the Water Heater can be removed for servicing.
Gas shut- off valve must be located as close as possible to the Water Heater and all connections must be kept to a
minimum.
WARNING: The operating pressure for the gas supply must be either 28-30mBar Butane or Propane.
Please note: After completing installation, a full function check including gas soundness must be carried out to
ensure that the appliance has been installed properly and operates correctly. The gas soundness check must be
carried out by an accredited LPG engineer and a test certificate for the Water Heater must be issued.
18
Fig. 33 Completed Installation - Underfloor Models
Hot Water Braided Hose
Front of Water Heater
Gas In
Flue
Cold Water Inlet Pipe
Quick Connect Fitting
Hot Water Braided Hose
Fig. 32 Connect Hot Water Supply
Drain Valve
Vehicle Floor
Fig. 34 Completed Installation - Onboard Models
Hot Water Braided Hose
Water Heater
Gas In
Flue
Vehicle Floor
Mounting Points Mounting Points Mounting
Points
Drain Pipe

To the User: Read the following instructions carefully.
Observe All Warnings.
Never operate the Water Heater without water in it. This appliance must not be connected directly to the mains
water supply without a pressure regulator fitted, or any water supply greater than 190 kPa (1.9 bar). Ensure that the
caravan water system, including this Water Heater is full of water and that the vehicle is level before operating.
If temperatures are likely to fall below zero degree celsius, you must ensure that water is drained from the Water
Heater. (Unless Frost Protection is in operation).
Please note: The Frost Protection setting is only recommended for a period of 3 days or less. The user must
ensure that Frost Protection is turned on, activated and remains in operation for the duration for its period of use.
Frost damage will not be covered by warranty. If the vehicle will not be in use for longer than 3 days, the water
system must be fully drained.
The Installer and Vehicle Manufacturer are responsible for providing user instructions and identification of symbols on
the control panel. When using operating switches provided by the Installer or Vehicle Manufacturer, the Installer or
Vehicle Manufacturer are responsible for providing user instructions and identification of symbols on the Control
Panel.
For operation of this Water Heater, a 12V d.c. supply must be connected at all times. To operate the Water Heater’s
electric elements, it must also be connected to a suitable 230V a.c. supply.
Step One: Upon initial operation or to refill after the system has been drained, check that the drain valve is
closed, (see Fig. 38A) then fill the system with clean fresh water.
Step Two: To fill, open one hot tap and switch on the water pump.
Step Three: Leave the tap open to allow air to escape while the Water Heater is filling. When water flows
smoothly out of the hot tap, the water heater is filled. To allow the remainder of air to escape from the
system, open each hot water tap in turn until water flows smoothly from each tap.
Option 1 Whale® Water Heater Control Panel
Gas Operation. Operate the left-hand switch to the ‘On’ position. There will be a pre-purge pause of approx. 15
seconds to allow any unburnt gas to leave the flue. A green LED will light upon successful flame ignition. If there is
air in the gas supply line, it may take a few attempts for the gas to ignite. See Section 9 for gas lockout re-setting. If
the ignition is not satisfactory, the red LED will flash - refer to the Trouble Shooting Guide (see section 9).
Electric Operation. The Water Heater is equipped with twin 750W (230V a.c.) immersion heater elements offering
operation at 750W or 1500W. Operate the right-hand rocker switch to the top position (~) to turn on one electric
element. To turn on both electric elements, operate the right-hand rocker switch to the bottom position.
Note: The electric elements will still operate if the appliance is in gas ignition lock-out.
Gas and Electric Operation. For faster water heating, the appliance can be operated with both gas and electric
simultaneously. Select ‘Gas On’ (left-hand rocker switch) and one of the electric settings (right-hand rocker switch).
Switching The Appliance Off. Operate the left-hand gas switch to the centre ‘Off’ position (O) and the right-hand
electric rocker switch to the centre ‘Off’ position (O). 19
Fig. 35 Whale Water Heater Control Panel
Electric Low Setting
Electric High Setting
Electric Off
Gas Off
Gas On
Gas Lit LED Diagnostic LED
7. INSTRUCTIONS FOR USE
Frost Protection

Protection Against Frost. If the Water Heater is not going to be used for more than 3 days, isolate the gas supply,
by ensuring the gas shut off valve is closed and that the mains gas supply is turned off. The Water Heater must be
fully drained if there is a risk of freezing (unless Frost Protection is selected on the control panel).
Please note: The user must ensure that Frost Protection setting is turned on, activated and remains in operation for
the duration of it’s use. This must not exceed 3 days. Frost damage will not be covered by warranty.
Option 2 - Whale®Duo Control Panel
Fig. 36 Whale Duo Control Panel
For Gas Operation - Water Heater: Press the Water Heater Function key until the ‘gas’ icon is illuminated. There
will be a pre-purge pause of approx. 15 seconds to allow any un-burnt gas to leave the flue and will extinguish when
the water is up to temperature. A green LED will light upon successful flame ignition. If there is air in the gas supply
line, it may take a few attempts for the gas to ignite. See Section 9 for gas lockout re-setting. If the ignition is not
satisfactory, the red diagnostic LED will flash - refer to the Troubleshooting Guide (see Section 9).
For Electric Operation - Water Heater: The Water Heater is equipped with twin 750W immersion heater elements
offering operation at 750W or 1500W.
For 750W, press the Water Heater Function key until the ‘low power setting’ icon is illuminated.
For 1500W, press the Water Heater Function key until the ‘high power setting’ icon is illuminated.
Note: The electric elements will still operate if the appliance is in gas ignition lock-out.
Gas and Electric Operation: For faster heating, the appliance can be operated with both gas and electric.
Press the Water Heater Function key until the desired function is illuminated.
For 750W and Gas, press the Water Heater Function key until the desired setting is illuminated.
For 1500W and Gas, press the Water Heater Function key until the desired setting is illuminated.
Switching Appliance Off: Press the Water Heater Function key until ‘Off’ is illuminated.
Frost Protection Setting: The control panel incorporates a low temperature / frost protection
setting. This can be activated by pressing the Water Heater Function key until the frost icon is illuminated. Please
note: The user must ensure that Frost Protection setting is turned on, activated and remains in operation for the
duration of its use. This must not exceed 3 days. Frost damage will not be covered by warranty.
Note: For Frost Protection to be active, the 12V d.c. supply must be on along with the power source i.e. gas supply
or 230V a.c.
Protection Against Frost. If the Water Heater is not going to be used for more than 3 days, isolate the gas supply,
by ensuring the gas shut off valve is closed and that the mains gas supply is turned off. The Water Heater must be
fully drained if there is a risk of freezing (unless Frost Protection is selected on the control panel).
20
Temperature Control
Space Heater Function
Diagnostic LED - Space Heater
Gas Light - Space Heater
Gas Light - Water Heater
Water Heater Function
Diagnostic LED - Water Heater Gas Icon