Dometic RM2652 Refrigerator Instruction Manual

Manual Dometic RM2652 Refrigerator Instruction Manual

Dometic RM2652 Refrigerator Instruction Manual

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Dometic RM2652 Refrigerator

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Dometic RM2652 Refrigerator

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Dometic RM2652 Refrigerator Instructions

Here we offer the Dometic RM2652 Refrigerator manual completely free and in English. We have cataloged this manual in the Refrigerators section on Manualverse, and it has been rated by 1 users with an average rating of 5. If you have any specific questions about Dometic RM2652 Refrigerator, we suggest checking the Frequently Asked Questions (FAQs) section of this manual.


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Dometic RM2652 Refrigerator Specifications

Feature Specification
Model Dometic Americana RM2652
Refrigerator Type Absorption refrigerator (ammonia/hydrogen), 2-way operation
Energy Sources 120 Volt AC or LP gas, plus 12 Volt DC for the controls
Total Refrigerator Volume 6.0 cu. ft.
Cabinet Height (A) 54-9/16 in (1386 mm)
Cabinet Width (B) 24-11/16 in (627 mm)
Cabinet Depth (C) 24-7/8 in (632 mm)
Enclosure Cutout Height (H) 53-3/4 in (1365 mm)
Enclosure Cutout Width (W) 23-11/16 in (602 mm)
Enclosure Cutout Depth (D) 24 in (610 mm)
Cutout Dimension Tolerance +/- 1/8 in
Minimum Ventilation Height (roof vent and lower side vent) 57-3/4 in
Minimum Clearances to Combustibles 0 in at top, sides, bottom and rear
Minimum Louver Opening Dimension 1/4 in
Upper Vent Cutout 5-1/2 in x 23-3/4 in
Lower Vent Cutout 13-3/4 in x 21-9/16 in
Gas Connection 3/8 in SAE (UNF 5/8 in-18) male flare at manual shutoff valve
Maximum LP Gas Supply Pressure 13-1/2 in water column (static, no load)
Correct LP Gas Operating Pressure 11 in water column
Isolation Test Pressure Threshold 1/2 psig
AC Power Connection 120 Volt AC, three-prong grounded plug
Power Cord Free Length 2 ft
Recommended Receptacle Location Left side (viewed from rear), approx. 6 in from the floor
12 Volt DC Supply Required for controls only (not for cooling); fused circuit
Minimum DC Operating Voltage 9.6 Volt DC
Maximum Total DC Conductor Lengths Listed 17 ft (5 m) and 27 ft (8 m)
Control System Fuse 3 amp
AC Heater Fuse 5 amp
Gas Ignition Sequence 45 seconds
Spark Electrode Gap 1/8 in to 3/16 in (3–5 mm)
Door Panel Maximum Thickness 5/32 in (4 mm)
Upper Door Panel Size Height 15-3/4 to 15-7/8 in (401–403 mm); Width 20-5/8 to 20-3/4 in (524–527 mm)
Lower Door Panel Size Height 32-5/8 to 32-11/16 in (825–827 mm); Width 20-5/8 to 20-3/4 in (524–527 mm)
Condensate Drain Hole 3/4 in through the floor
Mounting Screws 6 screws (front base, top frame, rear base)
Ice Tray Fill Level Within 1/4 in (5 mm) of the top
Climate Control 12 Volt DC, standard
Certification A.G.A. design certified to ANSI Z21.19; approved by the Canadian Gas Association
Certified Vent Kit Option #1 Roof base 3103633.XXX, roof cover 3103634.XXX, lower side vent 3102277.XXX
Certified Vent Kit Option #3-A Power vent assembly 3104131.002, roof base 3103633.XXX, roof cover 3103634.XXX
Manual Form Number 3107439.006 (11/96)

Dometic RM2652 Refrigerator Details

The Dometic Americana RM2652 is an absorption refrigerator made for recreational vehicles and mobile homes. It has no compressor. Ammonia liquefies in a finned condenser coil at the top of the unit, then flows into the evaporator inside the freezer section. There it meets circulating hydrogen gas, which makes the ammonia evaporate and produces cold. Because there are no moving parts in the cooling circuit, the unit runs quietly, but it relies on gravity and on good airflow across the back of the cabinet.

That design makes leveling important. The evaporator tubing is sloped so liquid ammonia keeps moving downward. If the vehicle stays parked off level for several hours with the refrigerator on, ammonia can pool in the tubing, slow or block circulation, and cooling drops off. The manual says the vehicle only needs to be level enough to live in comfortably. While driving, the rolling motion of the vehicle keeps ammonia from collecting, so leveling doesn't matter on the road.

The control panel has a main power button, an AUTO/GAS mode selector, an AUTO indicator lamp, a CHECK lamp for gas mode, and a climate control switch. In AUTO mode the electronics pick the best available energy source and give 120 Volt AC priority over gas. If AC power fails, the unit switches to LP gas on its own, and it goes back to AC when power returns. In both modes the thermostat is preset at the factory to stay below safe food storage temperature.

If the burner doesn't light, the CHECK lamp comes on. To reset it, turn the main power off and on again, which starts a new ignition attempt. The first start on gas, or the first start after the tanks have been refilled, may need three or four resets to purge air from the lines. The manual warns against resetting repeatedly if the lamp stays lit, and suggests checking the tank levels and shutoff valves first.

Inside, the food compartment is fully closed and unventilated. The coldest spots are under the cooling fins and at the bottom, and the upper door shelves are the warmest. Cover strong-smelling foods and vegetables. The freezer is not designed for deep or quick freezing. Precooled meat or fish keeps about three times longer in the freezer than in the fresh food compartment. Put soft fruits and ice cream in the coldest part of the freezer.

To defrost, switch the unit off, empty it, leave the drip tray in place and leave the doors open. You can speed things up by putting a tray of hot water on the freezer shelf. Never use hot air blowers or sharp tools, because they can warp parts or puncture the ammonia system. Clean the interior with a weak lukewarm soda solution, and use plain warm water for the gaskets, shelves and evaporator.

The standard 12 Volt DC climate control evaporates the moisture that forms on the frame between the compartments in hot, humid weather. It draws power continuously while it's on, so turn it off when no charging source is available. The doors can be converted to swing the other way with a conversion kit, but only before the unit is installed. The condensate drain hose has a check valve and can be extended if needed.

Dometic recommends maintenance once or twice a year by a qualified technician. This covers cleaning the vents and coils, leak testing with bubble solution, checking gas pressure, cleaning the flue and burner, and testing the gas safety shutoff, which should cut gas within one minute of a flame loss.

Frequently Asked Questions (FAQs)

Can't find the answer you need? Here are some frequently asked questions about the Dometic RM2652 Refrigerator, and we answer them below.


Can the Dometic RM2652 cool on 12 Volt DC?
No. The RM2652 is a 2-way model that cools only on 120 Volt AC or LP gas. It still needs 12 Volt DC to run its electronic controls, and those controls work down to 9.6 Volt DC.

What does the CHECK indicator lamp mean?
The CHECK lamp means the control could not light the burner in gas mode within the 45-second ignition sequence. To reset it, press the main power ON/OFF button to OFF and then back ON.

Why does the refrigerator take a long time to light on gas the first time?
Air may be trapped in the gas lines, especially after the tanks have been refilled or the unit has sat unused for a long time. You may have to reset the main power button three or four times to purge the air. If it still won't light, check that the tanks aren't empty and that all valves are open.

Why is leveling the vehicle so important?
The absorption system relies on gravity to move liquid ammonia through sloped evaporator tubing. If the unit runs off level while parked for several hours, ammonia can pool in the tubing and block circulation, and cooling is lost.

What gas pressure does the RM2652 need?
The correct operating pressure is 11 inches of water column, measured at the test port just ahead of the burner jet. The supply regulator must not exceed 13-1/2 inches of water column static.

What fuses does the refrigerator use?
It has two fuses: a 3-amp fuse for the control system and a 5-amp fuse for the AC heater. Both are under the power module cover at the back of the unit.

When should I use the climate control switch?
Turn it on during hot, humid months to evaporate the water droplets that form on the frame between the freezer and the fresh food compartment. Turn it off when no charging source is available, because it draws battery power continuously.

How do I defrost the refrigerator safely?
Switch the unit off, empty it, leave the drip tray in place and open both doors. A tray of hot water on the freezer shelf speeds things up. Never use a hot air blower or sharp tools, which can damage parts or the ammonia system.

Can the door swing be changed?
Yes. The doors are convertible using a conversion kit listed in the parts manual, but the change has to be made before the refrigerator is installed in its enclosure.

How often does the refrigerator need maintenance?
A qualified LP gas technician should inspect and clean it once or twice a year. That includes checking the vents, cleaning the coils, flue and burner, testing for leaks, checking gas pressure and testing the gas safety shutoff.

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