RM2351 • RM2354 • RM2451 • RM2454 • RM2551 • RM2554

The Fridge Defend by ARP helps keep your Dometic reliable while increasing safety, efficiency & reliability. This is the install page for the 3, 4, & 5 cubic foot series of Dometic RV fridge.


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.


Dometic 3, 4, & 5 Cubic Foot Refrigerators

The Dometic 3, 4, & 5 cubic foot RV refrigerators are very efficient as long as the cooling unit boiler is not allowed to overheat. The problem with these refrigerators is that they are mostly found in slide-in campers, class-b, and other everyday driver type RV conversions. As a result there is a high failure rate due to off-level use and other factors associated with everyday driving that destroys the cooling unit.

Please click here to see how the ARP Control can make your Dometic safer, more reliable, & efficient.

RM2351 RM2354 RM2451 RM2454 RM2551 RM2554

Power Wiring for ARP Controls

This image shows a typical installation for the Fridge Defend by ARP on a Dometic 3, 4, or 5 cubic foot fridge. This drawing shows wiring for either the 2-way or the 3-way installations. The only difference between the two types of fridge models is the 2-way fridge will not have relay #6.


Wiring Diagrams

RM2351; RM2451; or RM2551 2-Way

Please click here for the details of wiring the 2-way models without the boiler thermal switch.

RM2354; RM2454; or RM2554 3-Way

For the 3-way models that have relay #6. please click here for further details.

Fridge with Recall

Click here if your fridge has a boiler thermal switch that is wired in line with the power supply.

ARP Boiler Sensor Install

Click here for temperature sensor install video.

ARP Fan Install

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

Please see the full ARP User Manual and Installation Guide for more information needed before using your ARPrv Control.


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: RM2351; RM2352; RM2353; RM2354 RM2451; RM2452; RM2453; RM2454 RM2551; RM2552; RM2553; RM2554 Units
ARP Control Boiler Temperature 170-180 170-180 170-180 Celsius
Off-Level Operating Limit dependent on ambient and ARP boiler temp.
Minimum DC Power Supply 9.6 9.6 9.6 VDC
Maximum DC Power Supply 22 22 22 VDC
Maximum AC on 12VDC Supply Line 6 6 6 VAC

Fuses

FRIDGE MODEL: RM2351; RM2352; RM2353; RM2354 RM2451; RM2452; RM2453; RM2454 RM2551; RM2552; RM2553; RM2554 Units
Board AC Fuse 5 5 5 Amp
Board 12VDC Fuse 3 5 3 Amp

AC Power

FRIDGE MODEL: RM2351; RM2352; RM2353; RM2354 RM2451; RM2452; RM2453; RM2454 RM2551; RM2552; RM2553; RM2554 Units
Operating Range 100-132 100-132 VAC

DC Heaters

FRIDGE MODEL: RM2351; RM2352; RM2353; RM2354 RM2451; RM2452; RM2453; RM2454 RM2551; RM2552; RM2553; RM2554 Units
DC Heater Power Rating 150 175 175 Watts
Current 12.5 15 15 Amps
Heater Resistance per Heater (cold) 0.96 0.8 0.8 Ohms
Fuse 30 30 30 Amps

AC Heaters

FRIDGE MODEL: RM2351; RM2352; RM2353; RM2354 RM2451; RM2452; RM2453; RM2454 RM2551; RM2552; RM2553; RM2554 Units
AC Heater Power Rating 175 175 175 Watts
Current 1.5 1.5 1.5 Amps
Heater Resistance per Heater (cold) 80 80 80 Ohms

LP Gas

FRIDGE MODEL: RM2351; RM2352; RM2353; RM2354 RM2451; RM2452; RM2453; RM2454 RM2551; RM2552; RM2553; RM2554 Units
Gas Pressure 10.5-11.5 10.5-11.5 10.5-11.5 inch w.c.
Gas Jet #39 #43 #43
Gas Thermocouple 25-35 25-35 25-35 mili-Volts
Electrode to Burner Gap 3/16 3/16 3/16 inch

Fridge Temperature Sensor

FRIDGE MODEL: RM2351; RM2352; RM2353; RM2354 RM2451; RM2452; RM2453; RM2454 RM2551; RM2552; RM2553; RM2554 Units
Thermistor @ 33degF to 35degF 8k-10k 8k-10k 8k-10k Ohms
Please click here for more information on Dometic thermistor troubleshooting.

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