Dometic RM 123E Vent Hole Under Refrigerator, Flue Arrangement, Fitting the Upper Ventilator

73 mm	100 mm	300 mm
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(2 /8") 380 mm (15")	(4")	(11 13/16")
")	")
16	16
1/	15/
510 mm (20	659 mm (25		")
			16
			400mm (15 13/
			39 mm
		439 mm (17 5/ ")	( 1 1/2")
		16

Fig. 3

Alternatively, wooden battens may be screwed to the sides of the recess, from front to back, bearing down on the top of the cabinet to hold it firmly, as shown at A, fig. 4. Whichever method is used, it must be possible to remove the refrigerator easily for subsequent servicing purposes. The brackets or battens must be in a position where they will not restrict the air circulation over the cooling unit; they must not be positioned across the cabinet over the fins of the condenser of the cooling unit at the rear, otherwise air-flow will be impaired and performance affected.

Fitting the Upper Ventilator

To fit the upper ventilator, screw a block of wood approx. 25 mm (1") square x 66 mm (2 5/8) long. to each side of the recess, 16 mm (5/8") back from the front edge, as shown at B, fig. 4. Secure the ventilator to the blocks with a screw through the hole provided at each end.

	B
A

Fig. 4

Additionnal Ventilator

To reduce the amount of heat entering the caravan, particularly when used in warner climates, an additionnal ventilator (A, fig. 5), may be fitted in the wall of the vehicle, preferably above the level of the top of the refrigerator. (The exterior flue venting kit must still be used).

All surfaces above and adjacent to the flue outlet, and beside and below the burner housing should be of, or protected by, metal or other inflammable material.

8. VENT HOLE UNDER REFRIGERATOR

A ventilation hole of not less than 13 cm2 (2in2) effective area (40

mmor 1 5/8" diameter) must be provided in the floor below the refrigerator as shown in fig. 5. The hole should lead directly to the outside air through the floor or wall so that, in the event of a gas leak, it would provide an escape outlet for the heavier-than air gas. It should not be too close to the burner where draught could affect the flame.

On mobile installations, the vent hole should be shielded against entry of mud etc., by a deflector as shown in fig. 5a, fitted underneath with its "closed" end facing the front of the vehicle. The deflector should be made from a suitable piece of metal, to suit the particular installation.

9. FLUE ARRANGEMENT

Flue Baffle

The flue baffle (4, fig. 10) must be in position in the central tube of the boiler, suspended on its support wire so that the lower end of the baffle is 75 mm (3") above the bottom of the central tube over the burner. The top end of the baffle support wire is bent into the shape of an "O" and rests horizontally on the tp of the central tube. The baffle is correctly positioned during the manufacture ans should not become displaced during normal use. If the flue baffle is missins or is incorrectly located, the cooling unit will not operate properly on gas. Any strapping tape used to retain the baffle support wire to the top of the boiler casing during transit should be removed before installation.

Flue Venting Kit

The flue gasses must be vented directly to the outside air. Only the flue venting kit (supplied with the refrigerator in the United Kingdom) is recommended for this purpose. It consists of the following parts:

Flue Top Complete-G Flue Outlet Cover Plate-B Exhaust Gas Pipe Complete-F

Screw-sELF tAPPING. nO. 6 X 1/4in-H

The flue top (G) is in the form of a lazy "T" and incorporates an air-break to minimise the possibility of flame extinction due to draughts.

Leading from the flue-top, the extension tube (F) has to pass through the wall of the vehicle to direct the flue gasses to the outside. Care must be taken in determining the positions of the centres of the holes in the inner and outer skins of the caravan wall to accept the extension tube. As the amount of space between the back of the refrigerator and the inside wall og the vehicle as well as the thickness of the wall, may vary for each type of caravan, it is not possible to give actual dimensions therefore each case must be considered carefully before starting to make the opening. Take particular care to ensure that the angle is correct so that when in position, the extension tube will line up accurately with the sloping part of the flue-top.

The opening mus be large enough to allow the insertion of a layer of non-combustible material around the extension tube as shown in fig. 7, but the opening in the outer skin must not exceed 70 mm (2 3/4") in diameter, otherwise the flange on the flue outlet may not cover it completely.

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