DOMETIC CH4000 LPG Combi Heater Instruction Manual

DOMETIC CH4000 LPG Combi Heater Instruction Manual & troubleshooting

DOMETIC CH4000 LPG Combi Heater Instruction Manual  & troubleshooting 1

DOMETIC CH4000 LPG Combi Heater

DOMETIC CH4000 LPG Combi Heater Instruction Manual  & troubleshooting 2

Original Instructions

Please read these instructions carefully and follow all instructions, guidelines, and warnings included in this product manual in order to ensure that you install, use, and maintain the product properly at all times. These instructions MUST stay with this product. By using the product, you hereby confirm that you have read all instructions, guidelines, and warnings carefully and that you understand and agree to abide by the terms and conditions as set forth herein. You agree to use this product only for the intended purpose and application and in accordance with the instructions, guidelines, and warnings as set forth in this product manual as well as in accordance with all applicable laws and regula-tions. A failure to read and follow the instructions and warnings set forth herein may result in an injury to yourself and others, damage to your product or damage to other property in the vicinity. This product manual, including the instructions, guidelines, and warnings, and related documentation, may be subject to changes and updates. For up-to-date product information, please visit

Explanation of symbols

Safety instruction: Indicates a hazardous situation that, if not avoided, could result in death or serious injury.

Safety instruction: Indicates a hazardous situation that, if not avoided, could result in minor or moderate injury.

Indicates a situation that, if not avoided, can result in property damage.

Safety instructions

Please observe the prescribed safety instructions and stipulations from the vehicle manufacturer and service workshops.
Note the following basic safety information when using electrical devices to protect against:

  • Electric shock
  • Fire hazards
  • Injury

Handling the device


  • Installation and repair of the device must only be carried out by qualified personnel who are familiar with the risks involved and the relevant regulations. Inadequate repairs may cause serious hazards. For repair service, please contact the manufacturer‘s support (see back page).
  • In the event of a fire only use approved extinguishing agents. Do not use water to extinguish fires.


  • The device must be installed securely so that it cannot fall down.
  • Only operate the device if you are certain that the housing and the cables are not damaged.
  • Defective devices must not be used.
  • Do not use the device near flammable fluids.
  • Make sure no combustible objects are stored or installed near the air outlets. A distance of at least 50 cm must be kept.
  • Do not use the device without warm air ducts mounted


  • Only use the device as intended.
  • Do not make any alterations or conversions to the device.

Handling electrical cables


  • The electrical power supply may only be connected by a qualified electrician (e.g. VDE 0100, Part 721 in Ger-many).


  • Attach and lay the cables so that they cannot be tripped over or damaged.


  • Use cable ducts to lay cables through walls with sharp edges.
  • Do not lay loose or bent cables next to electrically conductive materials (metal).
  • Do not pull on the cables.

Target group for this instruction manual
The instructions in this manual are intended for qualified personnel at workshops who are familiar with the guidelines and safety precautions to be applied.



  • Control panel (Rotary Controller 1.5″, DICM) (mandatory)
  • Side cowl (mandatory)
  • Window switch (optional)
  • Hose clamp 80 mm (for exhaust duct)
  • Hose clamp 80 mm (for exhaust duct)

Intended use

The heater is designed for use in motor caravans, caravans and other vehicles with habitation compartments only, when the gas system is installed in accordance with EN 1949. The device is not suitable for installation in construction machines, agricultural machines, utility vehicles, marine craft, houses and apartments, hunting and forestry cabins, weekend homes, awning tents or similar equipment. The device may only be used to heat drinking water and to heat the interior of the vehicle. Never use it to warm other liquids. Only use the device with original warm air ducts and side cowl from the manufacturer installed. Never use other warm air ducts or cowls.

The device may only be operated while driving if facilities are installed to prevent uncontrolled leakage of liquid gas in the event of an accident (according to UN-ECE regulation 122). Devices not installed according to the manufacturer‘s installation requirements are not allowed to be used. If the device is installed in vehicles for commercial use, the national legal and insurance requirements need to be considered by the operator.  This product is only suitable for the intended purpose and application in accordance with these instructions. This manual provides information that is necessary for proper installation and/or operation of the product. Poor installation and/or improper operation or maintenance will result in unsatisfactory performance and a possible failure. The manufacturer accepts no liability for any injury or damage to the product resulting from:

  • Incorrect assembly or connection, including excess voltage
  • Incorrect maintenance or use of spare parts other than original spare parts provided by the manufacturer
  • Alterations to the product without express permission from the manufacturer
  • Use for purposes other than those described in this manual

Dometic reserves the right to change product appearance and product specifications. The manufacturer accepts no liability for any injury or damage to the product due to frost caused by the user not following the instructions in the manual.

Data plate
A data plate is attached to the device. This data plate provides the user and fitter with information on the specifications of the device.


CAUTION! Risk of injury
The device must only be installed by qualified personnel from a specialist company. The following information is intended for technicians who are familiar with the guidelines and safety precautions to be applied.

Notes on installation
Read this installation manual completely before installing the device. The following tips and instructions must be observed while installing the device:

WARNING! Risk of electrocution
Disconnect all power supplies when working on the device.

WARNING! Risk of electrocution
Disconnect all power supplies when working on the device.

CAUTION! Risk of injury

  • Improper installation of the device can result in irreparable damage to the device and put the safety of the user at risk.
  • Always wear suitable protective clothing (e.g. protective goggles, gloves).

NOTICE! Risk of damage
Observe the structural engineering of the vehicle and seal of all openings made when installing the device.


  • If the heater is operated while driving, a safety shut-off device must be installed to prevent an uncontrolled escape of LPG in the event of an accident (according to UN ECE regulation 122).
    If no safety shut-off device is installed, you can connect the D+ signal to the heater to prevent any operation while driving.
  • The installation of the device in vehicles must comply with the technical and administrative regulations of the respective country of use (e.g. EN 1949).
    The national legislation and regulations (e.g. DVGW Work Sheet G 607 for vehicles in Germany) must be observed.

Notes on installation location

WARNING! Risk of suffocation
The cowl must be positioned in such a way that exhaust gases cannot enter the interior.

  • Never run the exhaust duct outwards on the underside of the vehicle. Always run the exhaust duct to the side using a side cowl.
  • Observe the notes given in fig. 4, page 3 to fig. 6, page 3.
  • Observe the notes given in fig. 4, page 3 to fig. c, page 4.
  • Choose a place that is easily accessible for servicing as well as installing and disassembling.
  • Do not place the device on or above heat-sensitive materials.
  • Before installing the device, check whether any vehicle components could be damaged by the installation of the device (such as lamps, cupboards, doors).
  • For safety reasons, note the location of existing wiring harnesses, wires and other components within the installation area, in particular those which are not visible, when installing the device (when drilling or screwing etc.).
  • If the cowl is installed under a window that can be opened, an electric window switch must be installed.
  • Make sure that the air drawn in by the device cannot be contaminated by vehicle exhaust gases or by exhaust gases from the device.
  • The safety and drain valve must be installed directly beside the device. It must be placed below the cold water connection. It must be easily accessible for operation.

Notes on connection to the water supply

  • Only install the heater in a water cycle which contains a pressure pump with pressure regulator.

Notes on water hoses, gas pipes and warm air and exhaust ducts

  • The hoses, pipes and ducts must be routed in such a way that the device is easy to remove for service work.
  • To ensure the correct function, pipes and ducts must be laid tension-free and as short as possible.
  • Do not crush or kink pipes and ducts.
  • Warm air ducts and exhaust ducts might warm up the environment. Make sure that there is no material in contact with the warm air ducts which suffers from heat. Keep a distance of least 10 mm.
  • The water hoses for connecting to the boiler and the safety and drain valve must be safe for drinking water, pressure resistant up to 4.5 bar and hot water-resistant up to +80 °C.

Notes on connection to the gas supply

  • Check the compatibility of the data plate information with the gas sup-ply requirements of the vehicle.

Notes on electrical system

  • Only a qualified electrician should connect the device to the electrical power.
  • Check that the voltage specification on the data plate is the same as that of the power supply.
  • Do not lay cables which are loose or bent next to electrically conductive material (metal).
  • Protect cables from sharp edges.
  • CH4000E, CH6000E only: Install an all-pole switch with a contact opening width of at least 3 mm on the installation side for the AC supply (230 V).
  • If the device is powered by the mains (CH4000E, CH6000E only): ensure that the AC voltage supply has a residual current circuit breaker.

Notes on connection with a solar system

NOTICE! Risk of damage
The electronic of the device can be damaged by an irregular voltage supply from the solar system. Always use a voltage regulator or a battery with charger regulator between the device and the solar panel according to EN 1648.

Mounting and connecting the device

  1. Mount the device according to fig. d, page 4.
  2. Mount the control panel according to fig. e, page 4 to fig. g, page 5.
  3. Install the exhaust duct and cowl according to fig. i, page 5 to fig. l, page 6.
    • Guide the exhaust duct directly after the unit in a curve to the side or upwards according to fig. h, page 5. This helps to prevent rat-tling and reduce noise.
    • Fix exhaust duct at least every 50 cm (fig. h, page 5) using clamps (accessory).
  4. Install the warm air ducts according to fig. m, page 6 and fig. n, page 6.
  5. Observe water connection scheme: fig. o, page 6.
  6. Mount the safety and drain valve and connect to cold water supply according to fig. p, page 6 to fig. q, page 7.
  7. Connect the hot water outlet according to fig. r, page 7.
  8. Connect the venting hose according to fig. s, page 7.
  9. Ensure that the operating pressure of the gas supply and the device are the same, see data plate.
  10. Connect to the gas supply according to fig. t, page 7.
  11. Connect the device to power supply according to fig. u, page 7.
    • You can use D+ connection if no safety shut-off device (according to UN ECE regulation 122) is installed.
    • Make sure that at least 12 V is available at the device.


  1. Window switch (optional accessory)
  2. Room temperature sensor

Initial start-up

  1. Attach the supplied sticker with warnings in a clearly visible place on the heater or inside the vehicle, e. g. on the wardrobe door.
  2. If data plate is no more accessible after installation, attach the accompanied data plate (copy) to a place close to the device that is accessible.
  3. After installation, have the tightness of the gas supply line checked by a specialist, using the pressure drop method, and a test certificate issued (in Germany, e.g. in accordance with DVGW worksheet G 607).
  4. et value for under voltage alarm according to fig. v, page 7.
  5. Set the following settings (see operation manual):
    • max. fan speed in silent mode
    • min. fan speed in ventilation mode.
  6. Mark the year of installation on the data plate.
  7. Supply the owner of the vehicle with the operating manual.
  8. Check all functions of the device, especially the emptying of the water heater.

When a brand-new device is initially put into operation, smoke and odours may develop for a short time. ➤ In this case, ensure that the interior is well ventilated and operate the appliance for a few minutes at the highest temperature level for self-cleaning:

  • set room temperature to max. value
  • choose auto mode for air heating
  • choose hot mode for water heating.

Replacing fuses

Before servicing or changing the fuses, switch off the device, shut the gas supply and disconnect DC (12 V) supply. CH4000E, CH6000E only: Disconnect the AC (230 V) supply.

  • Replace broken DC fuses according to fig. w, page 8. Only use fuses with the same value.

Cleaning and maintaining

  • Clean the device according to fig. x, page 8.
  • Never use detergents containing chlorine for cleaning and disinfection.
  • perform self-cleaning once a week: see chapter “Self-cleaning” on page 11.
  • If side cowl is positioned below a window: Check window switch operation as a pre trip or seasonal check.
  • Check regularly, especially after long journeys, that the cowl and the exhaust duct are intact and correctly fixed.
  • Operate the safety and drain valve regularly, at least twice a year, to remove limescale deposits and ensure proper function.
  • Have the heater, its gas supply and ducting for the products of combustion checked by an expert in accordance with national regulations (e.g. in Germany every 2 years). If no national regulations exist that should be done at least every 2 years. The inspection must be certified on a test certificate (e.g. DVGW Work Sheet G 607 for vehicles in Germany).

To clean the system against bacteria operate the heater for a few minutes at the highest temperature level for self-cleaning:

  1.  Set room temperature to max. value.
  2. Choose auto mode for air heating.
  3. Choose hot mode for water heating.


Firmware version

  • Read out the firmware versions of the display (HMI) and of the heater according to fig. y, page 8.

Default routine for troubleshooting
Only execute the default routine if it is proposed in the error code table.

  1. Wait 3 minutes, then restart.
  2. If the heater does not operate properly contact the manufacturer‘s support.

Contacting the manufacturer‘s support
See back page of this manual.

Error code tableDOMETIC CH4000 LPG Combi Heater Instruction Manual  & troubleshooting 3DOMETIC CH4000 LPG Combi Heater Instruction Manual  & troubleshooting 4


  • Place the packaging material in the appropriate recycling waste bins wherever possible.

Technical data

CH4000 CH4000E CH6000 CH6000E
Manufacturer: Dometic Germany GmbH, Hollefeldstr. 63, 48282 Emsdetten, Germany
Product Identification Number: 0063DL3129
Heating capacity: 4000 W 4000 W

(1800 W electrical)

6000 W 6000 W

(1800 W electrical)

Rated input voltage: 10–16.5 Vg 10–16.5 Vg

220–240 Vw, 50/60 Hz

10–16.5 Vg 10–16.5 Vg

220 – 240 Vw, 50/60 Hz

Current consumption (12 Vg): Water heating 0.7 A

Max. air heating 7 A

Water heating 0.7 A

Max. air heating 12 A

Stand-by consumption: 5 mA
Required fuse: 15 A
Appliance category: I3B/P (30)
Gas category: LPG / Butane
Gas connection pressure: 30 mbar
Gas consumption:



325 g/h 487 g/h
  183 g/h


505 g/h
Gas stand-by consumption: 7.7 g/h (maintain water temperature)
Nominal heat input:



4.55 kW (Hs) 6.8 kW (Hs)
  2.5 kW (Hs)


6.85 kW (Hs)
Water connection pressure: max. 2.8 bar
Boiler (water volume at 2.8 bar): 10 l
Heating-up time: approx. 17 min (10 l, heated-up from 15 °C to 60 °C)
Operating temperature range: –20 °C to +60 °C
Dimensions L x W x H: 514 x 438 x 298 mm
Weight: 17.3 kg 18.5 kg 17.3 kg 18.5 kg




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