Maintenance & service

Service and maintenance must be done on a regular schedule to keep the refrigerator operating properly, efficiently and safely. The service should only be performed by a qualified technician who is familiar with LP gas systems and refrigerators.

Replacing the heater

The heat necessary for the operation of an absorption cooling unit is supplied by an electric heater mounted in a pocket of the boiler system.

The refrigerator is equipped with two electrical heaters, one for 230-240 V AC and one for 12 V DC.

To replace the heater proceed as follows:

1.Unplug the refrigerator power cord from the 230-

240 volt AC outlet. Disconnect the optional 12 V DC leads.

2.Shut off gas valve.

3.Remove the terminal block cover.

4.Disconnect the heater leads.

5.With a pair of pliers unfold the lug holding the lid of the boiler casing and open the lid.

6.Remove some insulation wool so that the heater is accessible.

7.Turn and lift the heater out of its pocket.

8.Fit the new heater into the pocket.

9.Connect the leads and put on the terminal block cover.

10.Put back the insulation and close the lid of the boiler.

Periodic maintenance

Checking the connections

Check all connections in the LP gas system (at the back of the refrigerator) for gas leaks. The LP gas supply must be turned on. Apply a non-corrosive bubble solution to all LP gas connections. The appearance of bubbles indicates a leak and should be repaired immediately by a qualified serviceman.

Checking the LP gas pressure

Cleaning the flue and burner

Inspect the flue baffle. It should be reasonably clean and free of soot. Heavy soot formation indicates improper functioning of the burner.

The flue and burner both require cleaning in the following manner:

1.Unplug the refrigerator power cord from the 230- 240 volt AC outlet.

2.Disconnect or shut off the 12 volt DC power to the refrigerator.

3.Turn manual shutoff valve to OFF.

4.Remove cover from the burner housing.

5.Disconnect the wire from the high voltage elec- trode.

6.Remove the burner mounting screw and remove the burner assembly.

7.Remove the wire and flue baffle from the top of flue tube.

8.Clean the flue from the top using a flue brush. Blowing compressed air into the flue will not prop- erly clean soot and scale out of the flue tube.

9.Replace the flue baffle.

10.Clean burner tube with a brush. Blow out burner with compressed air.

11.Before removing burner jet, clean burner area of soot and scale that fell out of flue tube. Remove the burner jet.

12.Soak the jet in wood alcohol and blow it out with compressed air. Reinstall and tighten burner jet.

Clear blue colour

The colour of the flame of flame shall be clear blue over the

slots of the burner.

The LP gas pressure should be checked and the main regula- tor readjusted if pressure is incorrect. The correct operating pressure is 2,7 kPa. The correct place to measure the LP gas pressure is at the test port just ahead of the burner jet.

Gas equipment assembly

 

 

 

 

 

 

Manual shut off valve

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Shown in open position

 

 

 

 

nut

 

 

 

 

 

 

Use a slotted screwdriver to change position

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inlet fitting

 

 

 

 

thermocouple

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

!

WARNING

Do not use a wire or pin when cleaning the burner jet as damage can occur to the precision opening. This can cause damage to the refrigerator or create a fire hazard.

pressure test port

spark electrode

 

 

 

 

burner tube

burner jet

burner mounting screw

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Dometic RM2453 manual Maintenance & service, Replacing the heater, Periodic maintenance, Checking the connections
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RM2453 specifications

The Dometic RM2453 is a cutting-edge absorption refrigerator designed specifically for use in recreational vehicles, boats, and off-grid living spaces. With a capacity of 8.7 cubic feet, it offers ample storage space for food and beverages, making it an excellent choice for those who value convenience and efficiency on the road.

One of the standout features of the RM2453 is its innovative absorption cooling technology. Unlike traditional compressors, which can be noisy and consume a lot of energy, the RM2453 operates silently and requires minimal power. This is particularly beneficial for RV and marine applications, where noise reduction and energy efficiency are paramount. The refrigerator uses a unique ammonia-based cooling system, which is not only efficient but also environmentally friendly. This ensures that users can enjoy a consistent temperature without the disturbance of compressor noise or the drawbacks of refrigerants that may harm the environment.

The Dometic RM2453 is equipped with a three-way power source, allowing it to operate on AC, DC, and propane. This versatility means that users can easily switch between power sources depending on their needs and availability, ensuring that the refrigerator remains operational regardless of their location. Whether plugged into a campsite electrical hookup, running off the vehicle’s battery, or utilizing propane while boondocking, the RM2453 provides flexibility that many other refrigerators cannot match.

Another notable characteristic of the RM2453 is its user-friendly design. It features adjustable shelving, allowing users to customize the internal configuration to accommodate various sizes of food items and containers. The reversible door hinge offers greater flexibility in terms of installation and access, ensuring that the refrigerator can fit seamlessly into any space.

In terms of build quality, the Dometic RM2453 is designed for durability. Its robust construction is engineered to withstand the rigors of travel and the marine environment. With a sleek and modern aesthetic, it not only performs exceptionally but also enhances the overall look of the kitchen or galley it occupies.

Overall, the Dometic RM2453 stands out in the market for its combination of energy efficiency, versatility, and practical design. It remains a top choice for those seeking a reliable refrigerator solution for their mobile lifestyle, delivering excellent performance and convenience in a compact package.
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