Truma Combi 2 E Operating Instructions Manual
Truma Combi 2 E is a liquefied gas heater with an integrated 10 liter hot water system. It can be operated on gas, electricity, or a combination of both. The fan-assisted burner ensures problem-free operation, even when on the move. The digital control panel allows you to easily set the desired temperature and mode of operation. The heater also features a safety/drain valve, overheating protection, and a variety of accessories.
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Combi 2 E / 4 E CP plus (Australia)
Operating instructions
To be kept in the vehicle!
Page 2
Combi 2 E / 4 E CP plus (Australia)
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Fig. 1
Table of contents
Symbols used ........................................................................ 3
Function description ......................................................... 3
Safety instructions ............................................................ 4
Important operating notes ............................................... 5
Operating instructions
Digital control panel .............................................................. 5
Room temperature sensor .................................................... 5
Safety/drain valve .................................................................. 5
Filling the hot water system .................................................. 6
Draining the hot water system .............................................. 6
Electrical operation 230 / 240 V – option – .................. 6
Start-up ................................................................................ 6
Switching off ...................................................................... 6
Maintenance ....................................................................... 6
Fuses .................................................................................... 7
Fuse 12 V ............................................................................... 7
Fuse 240 V ............................................................................. 7
Overheating protection 240 V ............................................... 7
Faults .................................................................................... 7
Troubleshooting guide (water supply) ................................... 7
Accessories ......................................................................... 8
Technical data ..................................................................... 8
Truma warranty policy ..................................................... 9
1 Control panel (digital)
2 Room temperature sensor
3 Cold water connection
4 Hot water connection
5 Gas connection (with pressure test point – not shown)
6 Hot air outlets
7 Recirculated air intake
8 Waste gas discharge
9 Combustion air infeed
10 Electronic control unit
11 Water container (10 litres)
12 Burner
13 Heat exchanger
14 Power electronics
15 Heating elements 240 V
16 Overheating switch 240 V
17 Safety/drain valve
18 Water pressure reducer
2
Symbols used
The unit must only be installed and repaired by an expert.
Symbol indicates a possible hazard.
Comment including information and tips.
Observe the ESD regulations! An electrostatic charge can destroy the electronics. Ensure potential equalisation before touching the electronics.
Function description
The Combi 2 E / 4 E CP plus (Australia) liquefied gas heater is a warm-air heater with integrated hot water system (10 litre capacity). The burner is fan-assisted, which ensures that operation is problem-free, even when on the move. The unit also has heating elements for electrical operation.
In heating and hot water mode the heater can be used to heat the room and heat water at the same time. If only hot water is required, select
hot water mode.
3 different options are available for operating the unit:
– gas mode only
LPG for autonomous use
– electrical mode only
240 V for stationary use on camp sites
– or gas and electrical mode –
mixed mode
Only possible in heating and hot water mode.
Heating and hot water mode
In heating and hot water mode, the unit automatically selects the required operating level according to the temperature difference between the temperature set on the control panel and the current room temperature. If the hot water system has been filled, the water is automatically heated as well.
The water temperature depends on the selected operating mode and the heater output.
All 3 energy selection options can be used for winter deployment.
– In gas mode the unit automatically selects the operating level that is required.
– In electrical mode output of 980 W (4.1 A) or 1960 W (8.1 A) can be manually preselected in accordance with the fuse protection at the camp site.
If more output is required (e.g. heating up or low outside temperatures) gas or mixed mode should be selected so that enough heating power is always available.
– In mixed mode 240 V electrical mode is preferred if the power requirement is low (e.g. for maintaining the room temperature). The gas burner is not enabled until the power requirement is higher, and is the first to switch off during heat-up operation.
Hot water mode
(with filled hot water system only)
Gas mode or 240 V electrical mode is used to generate hot water. The water temperature can be set to 60 °C.
– In gas mode the water is heated at the lowest burner setting. Once the water temperature has been reached, the burner switches off.
– In electrical mode output of 980 W (4.1 A) or 1960 W (8.1 A) can be manually selected in accordance with the fuse protection at the camp site.
Mixed mode is not possible. With this setting the unit automatically selects electrical mode. The gas burner is not enabled.
3
Safety instructions
The use of upright gas cylinders from which gas is
taken in the gas phase is mandatory
for the operation of gas regulators, gas equipment and gas systems. Gas cylinders from which gas is taken in the liquid phase (e. g. for fork lifts) must not be used, since they would result in damage to the gas system.
If the gas system is leaking or if there is a smell of gas:
– extinguish all open flames
– open windows and door
– close all quick-acting valves and gas cylinders
– do not smoke
– do not activate any electric switches
– ask an expert to inspect the entire system!
The vehicle owner is always responsible for arranging the gas inspection.
Liquefied gas equipment may not be used when refuelling, in multi-storey car parks, in garages, or on ferries.
During the initial operation of a brand new appliance (or after it has not been used for some time), a slight amount of fumes and smell may be noticed for a short while. It is a good idea to heat the device up several times in hot water mode (60 °C) and to make sure that the area is well ventilated.
– Do not place articles on or against this appliance.
– Do not use or store flammable materials near this appliance.
Repairs may only be carried out by an expert!
This device may be used by children aged
8 years or above and by persons with reduced physical, sensory or mental capabilities or lack of experience and / or knowledge, provided that they are being supervised or have been given instruction with regard to the safe use of the device and have understood the potential risks. Children must not use the device as a toy.
– Do not spray aerosols in the vicinity of this appliance while it is in operation.
– Do not modify this appliance.
The flow rate of the pressure control device must correspond to at least the maximum consumption of all devices installed by the system manufacturer.
We recommend the gas pressure control system Truma MonoControl CS for vehicles and the Truma gas pressure control system
DuoControl CS for dual-cylinder gas systems.
Guarantee claims, warranty claims and acceptance of liability will be ruled out in the event of the following:
– modifications to the unit (including accessories),
– modifications to the exhaust duct and the cowl,
– failure to use original Truma parts as replacement parts and accessories,
– failure to follow the installation and operating instructions.
At temperatures of around 0 °C or less the gas pressure regulator and the changeover valve should be operated using the EisEx regulator heater.
Controller connecting hoses that meet national regulations must always be used in the respective country for which the equipment is destined. These hoses must be checked regularly for brittleness. Winter-proof special hoses must always be used if the equipment is operated during the winter.
It also becomes illegal to use the appliance, and in some countries this even makes it illegal to use the vehicle.
The operating pressure for the gas supply is
2.75 kPa and must correspond to the operating pressure of the appliance (see type plate).
LPG systems and pressure regulators must comply with the technical and administrative regulations of the country in which the appliance is used (AS/NZS 5601). For your own safety it is absolutely necessary to have the complete gas installation regularly checked by an expert (at least every 2 years).
4
Important operating notes
If the cowl has been placed near or directly beneath an opening window, the device must be equipped with an automatic shut-off device in order to prevent operation with the window open.
The integrity and tight fit of the exhaust gas double duct must be checked regularly, particularly at the end of long trips. Also check the mounting of the appliance and the cowl.
Following a blow-back (misfire) always have the exhaust duct checked by an expert.
Operating instructions
Always observe the operating instructions and “Impor-
tant operating notes” prior to starting! The vehicle owner is responsible for the correct operation of the appliance.
The installer or vehicle owner must apply the yellow sticker with the warning information, which is enclosed with the appliance, to a place in the vehicle where it is clearly visible to all users (e.g. on the wardrobe door)! Ask Dometic Service to send you stickers, if necessary.
Before using for the first time, it is essential to flush the entire water supply system with clean water. If the heater is not being used, always drain the water if there is a risk of frost.
No warranty claims for frost damage will be accepted.
Keep the cowl for the exhaust duct and combustion air intake free of contamination (slush, ice, leaves etc.) at all times.
The warm air outlets and the circulated air intake openings must be clear so that the unit does not overheat.
Do not use any after market air filters or air grills. The use of such components may cause the unit to overheat.
The integrated temperature limiter blocks the gas supply when the unit becomes too hot.
Digital control panel
The digital control panel is described in a separate operating instruction.
Room temperature sensor
To measure the room temperature, an external room temperature sensor (2) is located in the vehicle. The position of the sensor is determined by the vehicle manufacturer, depending on the vehicle model. More information can be found in the operating instructions for your vehicle.
Warning: Air from the discharge vent may be
hot. Do not place combustible materials directly in front of the discharge vent. Keep curtains, bedding and other flammable materials away from the vent.
Fig. 2
2
The thermostat setting on the control panel depends on the personal heating requirement and the type of vehicle and must be individually determined.
Safety/drain valve
The safety/drain valve automatically equalises the pressure in the event of overpressure in the system. When this occurs, the water is drained to the outside in intermittent bursts via a drainage socket.
This safety/drain valve does not protect the water container from
frost damage.
c b a
Fig. 3
d
a = Lever in position “Operational – closed” b = Lever in position “Operational – closed” c = Lever in position “Drain” d = Drainage socket (led outside through floor of vehicle)
Opening the safety/drain valve
– Move lever to position (c) – vertical. The water from the hot water system drains through the drainage socket (d).
The drainage socket (d) of the safety/drain valve must be free of contamination (slush, ice, leaves, etc.) at all times so the water can drain easily!
No warranty claims for frost damage will be accepted.
Closing the safety/drain valve
– Move lever to position (a) or (b) – horizontal.
5
Filling the hot water system
Check whether the safety/drain valve is closed (see “Closing the safety/drain valve”).
– Switch on the power for the water pump (main switch or pump switch).
– Open hot water taps in kitchen and bathroom, (set preselecting mixing taps or single-lever fittings to “hot”). Leave the fittings open for as long as it takes for the hot water system to displace the air and fill up and the water to flow without interruption.
If only the cold water system is being operated without the hot water system, the hot water system also fills up with water. To avoid frost damage, the hot water system must be drained via the safety/drain valve, even if it was not operated.
In the event of frost, filling may be prevented by residual water that has frozen. The hot water system can be thawed out again by briefly starting it up (max. 2 minutes). Frozen lines can be thawed out by heating up the interior.
If connected to a central water supply (rural or urban connection), a pressure reducer must be used, which will prevent pressures of greater than 0.28 MPa from occurring in the hot water system.
Start-up
The use of the installed control panel is described in separate operating instructions.
The interior can be heated in gas, electrical or mixed mode, either with or without water, depending on the setting.
Check whether the power supply fuse protection at the camp site is adequate for the 980 W (4.1 A) or 1960 W (8.1 A) that have been selected.
The cable drum must be fully unwound in order to prevent the power cable from overheating.
– Check to make sure the cowl is unobstructed. Be sure to remove any covers that may be present.
– Open gas cylinder and quick-acting valve in gas supply line.
– Fill hot water system with water if necessary (see “Filling the hot water system”).
– Switch on heater at control panel.
Draining the hot water system
If the motor home / caravan is not used during the winter, the hot water system must be drained!
– Switch off the power to the pump assembly (main switch or pump switch).
– Open hot water taps in kitchen and bathroom.
In order to check the water that is flowing out, place an appropriate container (capacity 10 litres) beneath the drainage socket (d) of the safety/drain valve.
– Open safety/drain valve
(see “Opening the safety/drain valve”).
The hot water system is now drained directly to the outside via the safety/drain valve. Check whether all of the water in the hot water system (10 litres) has been drained into the container via the safety/drain valve.
– No warranty claims for frost damage will be accepted.
Electrical operation 230 / 240 V – option –
To operate the electric heating element, please insert the plug into the socket and then turn it on with the switch.
The electric heating element is operational when you can see the mark (e) on the switch.
e
Switching off
– Switch off heater at control panel.
– The switch-off procedure may be delayed by several minutes because of internal heater operations.
Always drain water if there is a risk of frost!
If the heater is not going to be used for a long period of time, close the quick-acting valve in the gas supply line and turn off the gas cylinder.
Maintenance
Only original Truma parts may be used for maintenance and repair work!
The device must be descaled on a regular basis (at least twice a year).
Servicing should be carried out only by authorised personnel.
Please contact Dometic Service Centre for service and repairs.
Biofilm, deposits and limescale must be removed using
chemicals to protect the unit from infestation by microorganisms. Only chloride-free products must be used in order to prevent damage to the unit.
The effectiveness of the use of chemicals to combat microorganisms in the unit can be increased by heating the water in the hot water system to 70 °C at regular intervals.
– Select “Gas” mode.
– Set water temperature to 60 °C.
– Switch on device.
Once the water in the hot water system has reached a temperature of 60 °C, the burner will switch off. The unit must stay switched on for at least 30 minutes and no warm water may be removed. The residual heat in the heat exchanger will heat the water up to 70 °C.
Fig. 4
6
Fuses
Fuse 12 V
The fuse is in the electronics beneath the connection cover.
Replace the unit’s fuse only with an identical fuse.
Device fuse: 10 A – slow – (T 10 A)
Fig. 5
14
T 10 A
Fuse 240 V
The fuse and the power supply lines must only be replaced by an expert!
The unit must be disconnected from the mains (all
poles) before opening the electronic housing lid.
The fuse is in the power electronics (16) beneath the
electronic housing cover.
This fine fuse must always be replaced with a fuse of the same type: 10 A, slow, interrupting capacity “H”.
T 10 A
Troubleshooting guide (water supply)
Fault
Water taking an extremely long time to heat up.
Cause / Remedy
Water container furred. /
Descale water system
(see “Maintenance”).
Water running out, cannot fill hot water system.
Safety/drain valve open. /
Close safety/drain valve.
Cannot empty hot water system, even though safety/ drain valve is open.
Water dripping/flowing from draining socket of safety/ drain valve.
Safety/drain valve draining connection blocked. / Inspect opening for contamination
(slush, ice, leaves, etc.) and remove contamination if necessary.
Water pressure too high. /
Check pump pressure (max.
0.28 MPa). If connected to a central water supply (rural or urban connection), a pressure
reducer must be used, which will prevent pressures higher than 0.28 MPa entering the hot water system.
When opening the cold water tap, hot water comes out.
Hot water flows back through the cold water supply. / Fit a non-return valve in the cold water supply (refer to installation instructions “Water connection”).
If these measures do not rectify the fault, please contact the nearest Dometic Service.
Disposal
The device must be disposed of in line with the administrative regulations of the respective country in which it is used. National regulations and laws must be observed.
Fig. 6
Overheating protection 240 V
The 240 V heating facility has a mechanical overheating switch. If the 12 V power supply is interrupted during operation or during the after-run period, for example, the temperatures within the unit could activate the overheating protection.
Faults
Faults – Heater
Descriptions of possible fault causes and a troubleshooting guide can be found in the operating instructions for the
control panel that is installed.
Faults – Water supply
Possible fault causes and a troubleshooting guide – See
“Troubleshooting guide (water supply)”.
Fig. 7
To reset the overheating protection, allow heater to cool, remove connection cover and press red reset button.
7
Technical data
determined in accordance with EN 624 or Truma test conditions
Type of gas
LPG (Liquefied Petroleum Gas – propane / butane)
Operating pressure
2.75 kPa (see type plate)
Water capacity
10 litres
Heating up time from approx. 15 °C to approx. 60 °C
Hot water system approx. 23 minutes
(measured according to EN 15033)
Heater + hot water system approx. 90 min.
Pump pressure
max. 0.28 MPa
System pressure
max. 0.45 MPa
Nominal input (Propane)
Combi 2 E CP plus (Australia):
Combi 4 E CP plus (Australia):
Thermal output
6.9 MJ/h
13.6 MJ/h
Electrical operation (240 V): 980 W / 1960 W
Mixed operation (gas and electrical): max. 3900 W
Gas operation
Combi 2 E CP plus (Australia):
Combi 4 E CP plus (Australia):
Gas consumption (Propane) max. 1950 W max. 3900 W
Combi 2 E CP plus (Australia):
Combi 4 E CP plus (Australia):
130 g/h
130 – 260 g/h
Air delivery volume (free-blowing without hot-air pipe) with 3 hot-air outlets max. 249 m³/h with
4 hot-air outlets max. 287 m³/h
Current input at 12 V
Heater + hot water system
Short-term max. 5.6 A (average power consumption 1.1 A)
Heating up of hot water system: 0.4 A
Stand-by: 0.001 A
Current input at 240 V
4.1 A (980 W) or 8.1 A (1960 W)
Weight (not containing water)
Heater unit: 15.8 kg
Heater unit with peripheral devices: 16.4 kg
Declaration of conformity
The heater Combi 2 E / 4 E CP plus (Australia) is approved according AS 4552, AS 4556, AS/NZS 60335.2.21+A1-A3,
AS/NZS 60335.2.30+A1, AS/NZS 60335.1+A1 and fulfills these standards:
Accessories
Truma CP plus
Digital control panel Truma CP plus (part no. 36020-01).
Fig. 9
Accessories (without picture) for control panels
– Cable 3 m (part no. 36110-01)
– Cable 6 m (part no. 36110-02)
– Cable 9 m (part no. 36110-03)
5375
Dimensions
450 mm 510 mm
Fig. 8
The right to make technical modifications is reserved!
8
Truma warranty policy
The warranty is given by Dometic Pty Ltd, Building 3B,
Clayton Business Park, 1508 Centre Road, Clayton, Victoria,
3168, for 12 months from the date of purchase against any defect arising from faulty materials or workmanship.
Repairs will be carried out during normal business hours only by Dometic Pty Ltd, or its duly authorised service agents, and are subject to the warranty conditions and exclusions hereunder.
Warranty conditions
– The company will only provide service on presentation of proof of purchase, on either the Truma product, or the
Caravan / RV / Pleasure Craft in which the Truma product has been installed, to any authorised service agent. The purchaser must allow the service agent to photocopy the proof of purchase to facilitate his claim to the manufacturer.
– Warranty repairs can only be performed by authorised service agents and under no circumstances will Dometic reimburse repairs carried out by unauthorised persons. Tampering with any part of the product by unauthorised personnel will automatically void the warranty.
– The product must be used solely for domestic purposes. If the product is used for commercial purposes the warranty is 6 months only.
– Where applicable, the products must be used on the appropriate electrical voltage, gas type and pressure, or fuel source.
– If at any time during the warranty period any part or parts are replaced with a part or parts not supplied or approved by Truma, this warranty shall immediately become void.
Important notice
Before calling a service technician please check carefully the operating instructions, warranty terms and conditions. If the product fails for any of the reasons detailed therein, or is faulty due to abuse, misuse or improper installation, then a service fee shall be charged to the purchaser.
If you have any queries regarding the interpretation of the warranty you should contact Dometic Pty Ltd.
Whilst this book represents service outlets at the time of printing, changes occur from time to time. Should you have any queries or wish to locate your nearest authorised service agent please contact Dometic Pty Ltd.
Warranty does not cover
– Any heater which has been:
(a) Subject to misuse, neglect, accident or alteration by any person.
(b) Damaged or destroyed by fire, flood, act of God or other inevitable accident.
– Fair wear and tear.
– Damage from foreign substances such as dirt or liquid.
– Travelling expenses or call out fee to and from authorised service agents premises.
– Accommodation or Site Expenses.
– Cleaning of the system or cleaning and adjustment of the gas system. This is considered to be a part of normal product maintenance.
– Non operation of the heater or resultant damage to the unit where the heater has been operated in an out of level situation.
– Freight cost of the appliance or parts, to or from, point of service or transit damage.
– Dometic / Truma are not responsible for resultant loss or damage sustained by the purchaser.
– Non operation of the appliance or resultant damage to the unit where the appliance has not been installed, ventilated, flued or operated in accordance with the manufacturer’s instructions.
Apart from any warranties implied by the Trade Practices Act
1974 or any relevant State legislation all other warranties express or implied whether arising by virtue of statute or otherwise are hereby excluded.
9
In Australia, always notify the Dometic Service Centre if problems are encountered; in other countries the
relevant service partners should be contacted
(www.truma.com).
Having the equipment model and the serial number ready (see type plate) will speed up processing.
Dometic Pty Ltd
Building 3B,
Clayton Business Park
1508 Centre Road
Clayton, Victoria, 3168
Australia
Service
(Australia)
Telephone: +61 (0)3 92 39 10 50
Facsimile: +61 (0)3 92 39 10 99
Dometic New Zealand Ltd.
Post Box 12011
1642 Penrose, Auckland
New Zealand
Service
(New Zealand)
Telephone +64 (0)9 622 14 90
Facsimile +64 (0)9 622 15 73
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