Dometic 630025.331 D.Wiring Requirements, E.Placing Air Conditioner On The Roof

630025.331 Installation Instructions

D.Wiring Requirements

1.120 VAC Supply Line

Route a copper 12 AWG, with ground, 120 VAC supply line from the time delay fuse or circuit breaker box to the roof opening.

a.This supply line must be located in the front portion of the 14-1/4" x 14-1/4" (±1/8") opening.

b.The power MUST be on a separate 20 Amp time delay fuse or HACR circuit breaker.

c.Make sure that at least 15" of supply wire extends into the roof opening. This ensures and easy connection at the junction box.

d.Wiring must comply with all National, State and Local Wiring Codes.

e.Use a steel sleeve and a grommet or equivalent methods to protect the wire where it passes into the opening.

E.Placing Air Conditioner On The Roof

This unit weighs approximately 100 pounds. To prevent back injury, use a mechanical hoist to place Air Conditioner on roof.

1.Remove the air conditioner from the carton and dis- card carton. See FIG. 7.

FIG. 7

2.Place the air conditioner on the roof.

3.Lift and place the unit over the prepared opening using the gasket on the unit as a guide. See FIG. 8.

FIG. 8

FRONT

CAUTION

Do not slide the unit. This may damage the roof gasket attached to the bottom and may create a leaky installation.

4.Place the 3106152.006 Mechanical Air Distribution Box Kit. This box contains mounting hardware for the air conditioner and will be used inside the RV.

This completes the outside work. Minor adjustments can be done from the inside of the RV if required.

F.Installing The Air Conditioner

1.Remove air box and mounting hardware from carton. The upper duct is shipped inside the lower duct which is part of the ceiling template.

2.Check for correct alignment and adjust the unit as necessary (Roof Gasket centers over 14-1/4" ±1/8" opening).

3.Remove upper duct from ceiling template and locate it over blower discharge. See FIG.9.

Note: Edge without flange installs toward REAR of opening.

FIG. 9	Rear Of Air
	Conditioner

Upper Discharge

Air DuctEdge Without

Flange To

Rear Of Unit

4.Use two (2) sharp pointed #10 sheet metal screws to hold duct to base pan. Screw holes are provided in bottom of base pan for these screws.

5.Reach up into return air opening of the air conditioner and pull the unit electrical cord down for later connection.

6.Measure the ceiling to roof thickness:

a.If distance is 1"-2", remove perforated tabs from both upper and lower ducts. See FIG. 10.

b.If distance is 2"-3", remove perforated tabs from bottom duct only. See FIG. 10.

c.If distance is 3"-4", install ducts as received. See FIG. 10.

d.If distance is 4"-6", use optional 318556.000 Duct Adaptor and 3100895.006 Bolt Kit. See FIG. 10.

FIG. 10	Upper Discharge
	Air Duct
Step a	Step b
Remove At
Perforation	Remove At
	Perforation
Step c	Lower Discharge
Use As
Packaged	Air Duct

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