Dometic RM760 User Manual download pdf (Page 5)

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RV Refrigerator Cooling Unit Removal and Installation Instructions

ATCO America RV refrigerator cooling unit instructions —provided as a service to our dealers

based on our years of experience supporting RV service technicians.

www.atcoamerica.com

Removal and Istallation

Page 5

Installation Instructions

1. Clean all the old thermal mastic from the ﬁ ns, freezer shelf or the back of the freezer plate.

2. Shave down the foam as needed to allow the back of the ﬁ ns to sit ﬂ ush and make contact with the evaporator tubes. A wood rasp

works well for this purpose. The secondary evaporator tubes in the face of the foam block should protrude slightly from the foam.

a. Before applying thermal mastic, dry-ﬁ t the cooling unit to the refrigerator box to make sure the foam block ﬁ ts correctly.

If necessary, trim the foam block to obtain an optimum ﬁ t, keeping the freezer tubes level. Recheck the ﬁ t and take the

cooling unit back out of the refrigerator box.

b. Attached to the cooling unit is a bag of thermal mastic. Remove the bag and cut one corner off.

c. Squeeze the bag of thermal mastic so a 1⁄2-inch bead is applied to the exposed tubes in the foam block and the tubes that

are covered by the aluminum freezer shelf.

d. Do not spread transfer mastic on the foam block!

3. Norcold ﬁ ns remain in the box. Do not attach them before setting the cooling unit in the box.

4. To install ﬂ ush-mount cooling units (Norcold and Dometic):

a. With transfer mastic applied, press the cooling unit in place.

b. Install one screw in the top of Norcold models and two screws in the top of Dometic models. Carefully stand the refrig-

erator up and check the alignment of the freezer screw holes.

c. Never drill new holes in the cooling unit!

d. Install all the freezer screws and ﬁ n screws.

5. You may need to put new holes through the refrigerator ﬁ ns of Norcold models to align the cooling unit screw holes.

a. Set the refrigerator down on its face and continue securing the cooling unit.

b. On Norcold models the boiler (generator) tube on the right should be parallel with the edge of the refrigerator when

secured.

6. To install Dometic cooling units with perpendicular freezer tubes:

a. With transfer mastic applied, fasten the refrigerator ﬁ ns to the cooling unit.

b. Set the cooling unit into the box and fasten it to the refrigerator.

c. Stand the refrigerator up and install the freezer trim and shelf. Also make sure the freezer shelf with the tubes is level,

using a two-way level.

d. If the tubes from the cooling unit are not visible, the level should be placed on the freezer compartment ﬂ oor.

7. Airtight installation is important on all cooling units.

a. We recommend one of two options. The ﬁ rst is to seal the seam between the foam block and the refrigerator box with

silicone caulking. The second is to use a putty knife to push ﬁ berglass insulation into the crack of the seam and then

cover the seam with foil-backed or duct tape.

b. Failure to seal the seam will cause inadequate cooling.

8. Finish attaching all remaining parts: burner, heating element, circuit board, capillary tube, etc.

9. Rock the refrigerator 45 degrees off vertical in all four directions to ensure the liquid is at the bottom before start-up.

a. If possible, test the refrigerator before installing it in the RV.

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Dometic RM760 User Manual Page 5

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