Hydrocarbon times, namely propane / butane, plays a vital role in caravanning. Namely, a heater, a boiler, a refrigerator, a cooktop, an oven, less often lighting lamps and even a toilet work from the gas in the caravan. Sooner or later, any caravaner is faced with a problem called "not burning" with one of the above devices. Before you grab the phone and frantically call Retrailer, you yourself may well find and, at least in half of the cases, fix the problem yourself.
In this article we will examine the frequent malfunctions and methods for their elimination on the example of the popular gas appliances used in caravans and motor homes.
Proceeding from physics, chemistry and other laws of the universe, 4 conditions must be fulfilled for burning something in a closed space:
- carbon monoxide release.
The absence of any of these 4 factors leads to the impossibility of burning. If more to the point, then general tips for all gas devices in motorhomes:
- Fuel in caravans is gas (propane / butane). It is necessary to make sure that there is gas in the cylinder, whether it is combustible (do other devices work from this gas). It is necessary to open all stop valves. Namely, the valve on the cylinder, the taps in the gas distributors indoors (usually located under the sink);
- Check visually (through the viewing window) or to the ear (during auto ignition) if a spark comes to the burner;
- and 4. Without air access and removal of carbon monoxide gases, the combustion process is not possible. Check all air intakes and exhaust pipes for foreign objects (debris).
Consider the points on examples of specific gas devices:
Gas heater Truma 3002, 3004, 5002, 5004, Carver
- During active operation, the main gas-valve distributor inevitably clogs with dust. This does not mean that the distributor should be replaced. It just needs to be taken apart and blown through;
- A spark is fed to the heater by means of a piezo-button or an automatic ignition unit. If there is no spark in the observation window of the spark radiator, this may be either a malfunction of the button / unit itself or the absence of a good contact between the power wire and the button / unit. Also, if water or snow gets on the burner through the exhaust pipe, a spark can be pierced into the body not in the place of the burner. This is corrected only by drying the burner;
- Air for combustion is taken from below, under the floor of the caravan. When operating on muddy roads, it may well get clogged with mud / snow. The air intake must be cleaned.
- At the end of the exhaust pipe on the roof of the house on wheels installed (if not, be sure to install) fungus. It protects the pipe from falling into it of various kinds of garbage, but it is practically powerless against snow. If the snow cap on the roof of the camper has completely closed the exhaust fungus (is it worth saying that in this case the heater will not work), simply clearing the snow around the fungus probably will not help. The snow has already got inside the pipe. To prevent the snow from cleaning the pipe from getting onto the burner, we recommend that you first disconnect the pipe from the heater, then unscrew the fungus and then try to clear the exhaust pipe from the snow. In order to prevent such a procedure, it is recommended to cover the fungus in advance with a tight case that prevents the ingress of snow inside.
Gas boiler Truma B10 / B14, Carver Cascade 2
- The last device preventing spontaneous passage of gas into the burner is an electromagnetic valve. Over time, the anchor of such a valve can sour in any position. Replacement is required here;
- The spark in the boiler burner is automatically generated and its presence can only be determined by ear from the characteristic "chattering" inside the boiler. If, when the boiler is turned on, not only a spark is not heard, but the LED on the control panel does not light up green, you must check the supply of 12V to the boiler from the battery, as well as the main fuse of the boiler (under the plastic cover on the boiler body);
- and 4. Air intake and boiler exhaust are combined and located on the side wall of the caravan. In the transport position, a deaf wardrobe is worn on top of the intake and exhaust grilles, so that during movement dirt, garbage and snow do not fall on the burner. Of course in the parking position, the case should be removed. If the caravan purchased by you was already without such a coffer, inspect the burner through the grate for the presence of debris and other foreign objects.
Absorption refrigerator Electrolux, Dometic, Thetford
- The gas valve-distributor of the refrigerator is located on the top control panel. What would he clog the dust and dirt was not noticed. What can not be said about the burner, which by means of the lower supply ventilation grill is open to all winds, as well as soot and scale, which is poured onto it from the ventilating pipe-heat exchanger. First aid: remove the lower supply grille outside the caravan and blow the burner through a circular side opening (where gas is mixed with air) in it with a car compressor using a small-diameter nozzle.
- As in the Truma gas heater, the spark can be supplied by a piezo button or an automatic ignition unit. When using piezo-buttons, control of the spark and flame is carried out visually, through a viewing window inside the refrigerating chamber. When using the ignition unit, the spark control is carried out by ear and visually, by the flashing of the red LED on the power button.
- The air intake is carried out through the lower ventilation grill or through the floor of the trailer (Scandinavian version). You must check the lattice and the space behind the lattice on the presence of foreign objects and debris. The grille for the winter can be closed with a winter plug. In this case, there will not be sufficient air flow into the burner.
- The output of carbon monoxide is carried out through a separate compartment in the upper side ventilation grill or a separate fungus on the roof (Scandinavian version). All these vents must be clean.
Hob Cramer, Dometic, SMEV
- Each of the burners has its own gas distribution valve. They do not cause complaints in work, never litter. There may be a blockage on the outlets of the burners themselves, but as a rule, most of the outlets on the burners are always working;
- In European caravans (excluding the UK) of the 00s and 90s, there was no piezo igniter at all. The elements sticking up next to each burner, which most of the beginning caravaners perceive as piezoelectric electrodes, are nothing more than thermocouples of the gas control system;
- Not relevant, unless you are in outer space;
- As a rule, a hood with a fan and a nozzle facing the roof and ending with a fungus is located above the hob. Gas burners on the hob will be great and burn without exhaust, enriching lard with carbon monoxide gas, which is not good for health. Therefore, it is desirable to include the hood at each cooking.