RM 8401 • RML 8401 • RMS 8401 • RM 8405 • RML 8405 • RMS 8405 •
RM 8501 • RMD 8501 • RML 8501 • RMS 8501 • RM 8505 • RMD 8505 • RMF 8505 • RML 8505 • RMS 8505 •
RM 8551 • RMD 8551 • RML 8551 • RMS 8551 • RM 8555 • RMD 8555 • RML 8555 • RMS 8555

In order to keep your Dometic 8 series fridge reliable, safe, and efficient the installation of the Fridge Defend is required. This series of RV fridge requires the Fridge Defend + Fan Control to remain cool in hot weather.


Table of Contents

REQUIRED TO DOWNLOAD INSTALLATION INSTRUCTIONS - WEB PAGES ARE SUPPLEMENTAL - EACH VERSION OF CONTROL HAS INTRICACIES REQUIRING THE WRITTEN INSTRUCTIONS.

Instructions: Subjects are listed on left. Click the link to the right to go directly to the subject matter on this page.


RML8555 Cooling Unit

About Dometic 8 Series

The Dometic 8 Series of refrigerator are used in Class-B and Class-C type RVs. For example, the RML8555 is found in Winnebago VIA Class-C. Due to the side-vent arrangement on these types of RV the Fridge Defend + Fan Control is a must to keep these RV referigerators working in hot weather.

Click here to see how the Fridge Defend helps prevent fires while improving reliability and efficiency.

Description of Model Number

The figure to the left is a cooling unit for a Dometic RMw 8xyz, where the lower case letters are defined for the models in the following manner:

w: This value can take on the following letters; S= housing with step; T= TecTower; D= large; O= single door fridge with oven.

8: Dometic 8 series RV fridge.

x: 4= 486mm width; 5= 535mm width.

y: 0= standard depth; 5= 55mm depth; 6= 65mm depth.

z: 0= Manual Control; 1= Automatic Control (MES = manual energy select); 5= Automatic Control (AES = automatic energy select).


RML8555 Wiring

ARP Wiring

This image shows the terminal block, the terminals are identified as follows:
(1) Negative/Ground 12 Volt connector for electronics (black wire).
(2) Positive 12 Volt connector for electronics (violet wire).
(3) D+ alternator signal - optional (black wire).
(4) S+ solar panel signal - optional (white wire).
(5) -12VDC heater (white wire).
(6) +12VDC heater - 16A fused (red wire).

Dometic 8 Series AES & MES Wiring

Please click here for detailed wiring instructions.

ARP Fan Install

Please click here for the ARP blower fan and temperature sensor installation.


RML8555 VIA

Install Boiler Sensor

This photo is of an RMD 8501 burner and boiler assembly. The boiler housing needs to be opened to install the ARP Control boiler sensor. The boiler housing can be squeezed to unlatch the joint that holds the sheet metal together.

ARP Boiler Sensor Install

Click here for temperature sensor install video.

RML8555 Burner

This photo shows the burner assembly and the boiler housing opened for the installation of the ARP temperature probe. Please note that the burner assembly is at the bottom of the flue tube. The burner attaches to the flue tube with one Phillips screw. To the left of the flue tube is the boiler tube, the boiler tube is easy to identify because the electric heaters are welded to the boiler tube. It is on the boiler tube that the ARP sensor is mounted.


RML8555 Cooling Unit

This is a photo of an RLM 8555 cooling unit without the burner assembly or the boiler housing and insulation blocking the view of the respective tubes within the boiler housing.

The arrow points to the approximate location where the ARP sensor should be installed. Be sure to insulate the sensor and wire exiting the boiler housing very well, the insulation will around the wires will protect the wires from being cut by the sheet metal.

Please click here to see further information regarding the location of the ARP boiler sensor.


Dometic Service Manual Repair Specifications

Please note that all of the following specifications are believed to be accurate. If any errors are found, please bring them to our attention as soon as possible. For critical specification please contact Dometic as they make changes to their specifications without notice.

FRIDGE MODEL: RM 8501 RMD 8501 RM 8505 RMD 8505 RM 8551 RM 8555 RML 8551 RMD 8551 RML 8555 RMD 8555 Units
ARP Control Boiler Temperature 185-195 185-195 185-195 185-195 185-195 185-195 185-195 185-195 185-195 185-195 Celsius
Off-Level Operating Limit dependent on ambient and ARP boiler temp.
Minimum DC Power Supply 10.5 10.5 10.5 10.5 10.5 10.5 10.5 10.5 10.5 10.5 VDC
Maximum DC Power Supply 22 22 22 22 22 22 22 22 22 22 VDC
Maximum AC on 12VDC Supply Line 6 6 6 6 6 6 6 6 6 6 VAC

Fuses

Board 12VDC Fuse 1 1 1 1 1 1 1 1 1 1 Amp
Board AC Fuse -- -- -- -- -- -- -- -- -- -- Amp

AC Power

Operating Range 103-132 103-132 103-132 103-132 103-132 103-132 103-132 103-132 103-132 103-132 VAC

DC Heaters

DC Heater Power Rating 130 130 130 130 170 170 170 170 170 170 Watts
Current 10.8 10.8 10.8 10.8 14.2 14.2 14.2 14.2 14.2 14.2 Amps
Heater Resistance per Heater (cold) 1.11 1.11 1.11 1.11 0.85 0.85 0.85 0.85 0.85 0.85 Ohms
Fuse 16 16 16 16 16 16 16 16 16 16 Amps

AC Heaters

AC Heater Power Rating 135 135 135 135 190 190 190 190 190 190 Watts
Current 1.1 1.1 1.1 1.1 1.6 1.6 1.6 1.6 1.6 1.6 Amps
Heater Resistance per Heater (cold) 106.7 106.7 106.7 106.7 75.8 75.8 75.8 75.8 75.8 75.8 Ohms

LP Gas

Gas Pressure 10.5-11.5 10.5-11.5 10.5-11.5 10.5-11.5 10.5-11.5 10.5-11.5 10.5-11.5 10.5-11.5 10.5-11.5 10.5-11.5 inch w.c.
Gas Jet -- -- -- -- -- -- -- --
Gas Thermocouple 25-35 25-35 25-35 25-35 25-35 25-35 25-35 25-35 25-35 25-35 mili-Volts
Electrode to Burner Gap -- -- -- -- -- -- -- -- -- -- inch

Fridge Temperature Sensor

Thermistor @ 32degF 27.7k 27.7k 27.7k 27.7k 27.7k 27.7k 27.7k 27.7k 27.7k 27.7k Ohms
Please click here for more information on Dometic thermistor troubleshooting.

If you cannot find what you need please use the Contact Us form from the top or bottom menus.