Dometic 3241.301 Installation & Operating Instructions Manual Download Page 5

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It is the responsibility of the installer of this 

system to ensure structural integrity of the 

Caravan roof. Never create a low spot on the 

roof where water will collect. Water standing 

around  the  unit  may  leak  into  the  interior 

causing damage to the product and the Cara-

van.

D.  Wiring Requirements

 

1.  220 - 240 VAC Supply Wire

 

 

Route a copper, with ground, 220 - 240 VAC sup-

ply wire from the time delay fuse or circuit breaker 

box to the roof opening. The proper size wire can 

be determined from chart on page 3.

Note:

 If vent fan was removed, the existing wire may be 

used provided it is of proper size, location and correctly 

fused.

 

 

a.  This supply wire must be located in the front 

portion of the 362 mm x 362 mm (± 3 mm) 

opening.

 

 

b.  The power MUST be on an appropriately sized 

separate time delay fuse or circuit breaker. The 

proper protection can be determined from chart 

on page 3.

 

 

c.  Make sure that at least 381 mm of supply wire 

extends into the roof opening. This ensures an 

easy connection at the junction box.

 

 

d.  Wiring methods must comply with all national 

and local wiring codes and/or regulations.

 

 

e.  Protect the wire where it passes into the open-

ing with approved method. See paragraph "d" 

above.

Note:

 These power supply connections may be replaced 

with type Y attachments if done by qualified personal.

This unit weighs approximately 45 Kilograms. 

To prevent back injury, use a mechanical hoist 

to place unit on roof.

Do not slide the unit. This may damage the 

roof gasket attached to the bottom and may 

create a leaky installation.

FIG. 6

FRONT

E.  Placing Unit On The Roof

 

1.  Remove the unit from the carton and discard car-

ton.

 

2.  Place the unit on the roof.

 

3.  Lift and place the unit over the prepared opening 

using the gasket on the unit as a guide. See FIG. 

6.

 

4.  Place the  air distribution box kit inside the Caravan. 

This box contains mounting hardware for the unit 

and will be used inside the Caravan. 

This completes the outside work. Minor adjustments can 

be done from the inside of the Caravan if required.

F.  Installing The Unit

 

1.  Remove air distribution box and mounting hardware 

from carton.

 

2.  Check for correct alignment and adjust the unit as 

necessary (Roof gasket centers over the 362 mm 

x 362 mm (± 3 mm) opening.

 

3.  Reach up into the return air opening and pull the 

unit electrical cord and heater cord (if applicable) 

down for later connection. See FIG. 7.

FIG. 5 

Do Not Cut 

Roof Structure 

Or Rafters

Good-Rafters 

Supported By 

Cross Beams

Optional Metal 

Frame

Frame Opening So It 

Won't Collapse When 

Bolting Down Unit

Leave Access For 

Power Supply Wiring

381 mm Min. At 

Front Of opening

19 mm Min.

FIG. 7

Reach In The Return Air Opening, 

Pull  Down  The  Unit  Electrical 

Cords

Lift And Place

Do Not Slide

Summary of Contents for 3241.301

Page 1: ...THIS UNIT INFORMATION FOR FUTURE REFERENCE Type Number Product Number Serial Number ADB Number ADB Serial Number Date Purchased This manual must be read and understood before installation adjustment s...

Page 2: ...p 3 Powerwhentheunitstartsmustbeabove198VAC and the frequency must be 50 Hz at all times D The ability of the air conditioner to maintain the de sired inside temperature depends on the heat gain of th...

Page 3: ...is unit installa tion 2 The manufacturer will not be liable for any dam ages or injury incurred due to failure in following these instructions 3 The equipment shall be installed in accordance withnati...

Page 4: ...ay create a shock hazard causing death or severe personal injury FIG 3 Dimensions Are Nominal Dimensions Are Nominal 70 mm overall depth 635 mm 508 mm Front 76 mm 125 mm 130 mm 76 mm 362 mm x 362 mm 3...

Page 5: ...placed with type Y attachments if done by qualified personal Thisunitweighsapproximately45Kilograms Topreventbackinjury useamechanicalhoist to place unit on roof Do not slide the unit This may damage...

Page 6: ...pter tabs into the ceiling template See FIG 11 3 Pin Heater Connector If Electric Heat Installed FIG 9 9 Pin Connector Control Box Return Air Opening Discharge Opening Remove Liner From Foam Tape Fron...

Page 7: ...End Of ADB To Ceiling Push Here To Engage Latches Then Remove Labels Auxiliary Screw Locations Auxiliary Screw Locations FIG 15 Install 2 Primary Mount Screw First Strain Relief b Tighten the strain r...

Page 8: ...2 3 minutes before turning on the unit This allows the refrigerant pressures in the unit system to equalize so the com pressor may restart B Cooling Operation Blue Graphic 1 Setthethermostatatthedesi...

Page 9: ...ed heat output and could fully stop fan rotation in extreme condi tions To avoid this the system controls turn off the compressor if out door temperature drops below 5 6 C and returns heating when the...

Page 10: ...10 ROOF MOUNT ASSEMBLY Rear Air Conditioner Heat Pump AC HP Discharge Duct Ceiling Template With Metal Brackets Mounting Bolts Air Distribution Box ADB Roof Opening FIG 19 Duct Adapter Vents Filter s...

Page 11: ...51 5 75 7 127 21 620 02 6 211 725 72 21752 6 02725 20 7 8 67 57 51 75 51 51 6 5 2 7 8 7 3 66 2035 6625 7 31 37 5 203 20 50 3 1 3 1 5 3 7 31 7 7 5 7 51 5 67 57 66 67 127 21 620 02 6 127 21 620 02 6 5 1...

Page 12: ...2 6 67 57 3 353 3 66 75 7 5 25 353 20 50 203 3 31 37 5 25 7 353 1 1 211 725 1 7 31 51 7 7 1 3 6 5 2 2035 6625 5 9 56 1 9 9 7 8 31 8 0 17 7 7 67 7 51 51 8 5 20 51 7 02725 9a 86 233 5 21 8 7256 21 5 1 7...

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