Dometic 620412.331, 620415.331, 620425.331, 620415.336, 620425.336 Installation Instructions Manual

USA

C

S

SERVICE OFFICE
Dometic Corporation
2320 Industrial Parkway
Elkhart, IN 46515
574-294-2511

RECORD THIS UNIT INFORMATION FOR
FUTURE REFERENCE:
Model Number
Serial Number
Date Purchased

MODEL 6204XX

Roof-Top Air Conditioner

used with one of following:

3105007 Return Air Cover

3105935 Quick Cool Return Air Cover

CANADA

Dometic Distribution
866 Langs Drive
Cambridge, Ontario
CANADA N3H 2N7
519-653-4390

For Service Center
Assistance Call:

800-544-4881

U

3308120 Genesis Air Filtration System

and

3106995 Analog W all Thermostat

THIS UNIT IS DESIGNED FOR OEM INSTALLATION

ALL INITIAL INSTALLATIONS MUST BE APPROVED BY THE SALES DEPT.

This manual must be read and un­derstood before installation, ad­justment, service, or maintenance
is performed. This unit must be in­stalled by a qualified service tech­nician. Modification of this product
can be extremely hazardous and
could result in personal injury or
property damage.

Lire et comprendre ce manuel avant de
procéder à l'installation, à des réglages,
de l'entretien ou des réparations.
L'installation de cet appareil doit être
effectuée par un réparateur qualifié.
Toute modification de cet appareil peut
être extrêmement dangereuse et
entraîner des blessures ou dommages
matériels.

INSTALLATION

INSTRUCTIONS

REVISION:

Form No. 3308970.015 2/05
(Replaces 3308970.007)
(French 3308971.013)
©2005 Dometic Corporation
LaGrange, IN 46761

Important: These Instructions

must stay with unit.
Owner read carefully.

Models

620412.331

620415.331

620415.336

620425.331

1

620425.336

620426.331

620426.336

620412, 620415, 620425 & 620426 Series Installation Instructions

SAFETY INSTRUCTIONS

This manual has safety information and instruc­tions to help users eliminate or reduce the risk of
accidents and injuries.

RECOGNIZE SAFETY INFORMATION

!

This is the safety-alert symbol. When you see this
symbol in this manual, be alert to the potential for
personal injury .

Follow recommended precautions and safe op­erating instructions.

UNDERSTAND SIGNAL WORDS

A signal word , WARNING OR CAUTION is used
with the safety-alert symbol. They give the level of
risk for potential injury .

WARNING

!

ous situation which, if not avoided, could result in
death or serious injury .

CAUTION

!

ous situation which, if not avoided may result in
minor or moderate injury .

CAUTION

symbol indicates, a potentially hazardous situa­tion which, if not avoided may result in property
damage.

Read and follow all safety information and instruc­tions.

indicates a potentially hazard-

indicates a potentially hazard-

used without the safety alert

GENERAL INFORMATION

A. Product features or specifications as described or illustrated

are subject to change without notice.

B. This Air Conditioner Is Designed For:

1. Installation on a recreational vehicle during the time
the vehicle is manufactured.

2. Mounting on the roof of a recreational vehicle.

3. Roof construction with rafters/joists on minimum of 16
inch centers.

4. Minimum of 2.00 inches and maximum of 5.50 inches
distance between roof to ceiling of recreational vehicle.
Alternate installation methods will allow for roofs more
than 5.50 inches thick.

C. The ability of the air conditioner to maintain the desired

inside temperature depends on the heat gain of the RV.
Some preventative measures taken by the occupants of the
RV can reduce the heat gain and improve the performance of
the air conditioner. During extremely high outdoor tempera­tures, the heat gain of the vehicle may be reduced by:

1. Parking the RV in a shaded area

2. Using window shades (blinds and/or curtains)

3. Keeping windows and doors shut or minimizing usage

4. Avoiding the use of heat producing appliances

Operation on High Fan/Cooling mode will give optimum or
maximum efficiency in high humidity or high outside tempera­tures.

Starting the air conditioner early in the morning and giving it a
"head start" on the expected high outdoor ambient will greatly
improve its ability to maintain the desired indoor temperature.

For a more permanent solution to high heat gain, accessories like
A&E outdoor patio and window awnings will reduce heat gain by
removing the direct sun. They also add a nice area to enjoy
company during the cool of the evening.

D. Condensation

Note: The manufacturer of this air conditioner will not be respon-

sible for damage caused by condensed moisture on ceilings or
other surfaces. Air contains moisture and this moisture tends to
condense on cold surfaces. When air enters the RV, condensed
moisture may appear on the ceiling, windows, metal parts, etc.
The air conditioner removes this moisture from the air during
normal operation. Keeping doors and windows closed when this
air conditioner is in operation will minimize condensed moisture
on cold surfaces.

2

Size**

Minimun

Generator

1Unit/2Units

Weight

Installed

(Pounds)

** User

Supplied

AC Circuit

Protection

Minimum

Wire Size*

R-22

(Oz.)

Refrigerant

Copper

12 AWG

620412, 620415, 620425 & 620426 Series Installation Instructions

Up To 24'

Total

Static

Max./Min.

W.C.

Speed

Max./Min.

SCFM-High

SPECIFICATIONS

Amps

Rotor

Locked

Fan Motor

Load

Amps

Rated

Fan Motor

Amps

Rotor

Locked

Compressor

Load

Amps

Rated

Compressor

Watts

Heater

Amps

Rating

Electrical

60Hz.

120VAC

1 Phase

Cooling

Nominal

Capacity

(BTU/HR)

No.

Model

620412.331 11,000 1530 9.5 53.0 3.5 10.0 335 / 250 .012 / 0.65 17.0 20 Amp 95 2.5 KW/4.0 KW

620415.331 13,500 1530 12.4 60.0 3.5 10.0 335 / 250 .012 / 0.65 15.2 20 Amp 95 3.5 KW/5.0 KW

620415.336 13,500 1530 12.4 60.0 3.5 10.0 335 / 250 .012 / 0.65 15.2 20 Amp 95 3.5 KW/5.0 KW

620425.331 13,500 12.4 60.0 3.5 10.0 335 / 250 .012 / 0.65 15.2 20 Amp 95 3.5 KW/5.0 KW

620415.336 13,500 12.4 60.0 3.5 10.0 335 / 250 .012 / 0.65 15.2 20 Amp 95 3.5 KW/5.0 KW

620426.331 15,000 12.0 64.0 3.3 8.2 380 / 250 .012 / 0.65 20.0 20 Amp 95 3.5 KW/5.0 KW

620426.336 15,000 12.0 64.0 3.3 8.2 380 / 250 .012 / 0.65 20.0 20 Amp 95 3.5 KW/5.0 KW

3

When sizing the generator, the total power usage of your recreational vehicle must be considered. Keep in mind generators lose power at high altitudes

an dfrom lack of maintenance.

* For wire length over 24 ft., consult the National Electric Code for proper sizing.

** Dometic Corporation gives GENERAL guidelines for generator requirements. These guidelines come from experiences people have had in actual applications.

*** CIRCUIT PROTECTION: Time Delay Fuse or HACR Circuit Breakers Required.

620412, 620415, 620425 & 620426 Series Installation Instructions

CAUTION

M

i

c

r

o

-

T

h

e

r

m

F

i

l

t

e

r

S

y

s

t

e

m

Micro-Therm

Filter

System

F
I

L
T

E

R
R
E

S

E

T

FILTER
RESET

C
L

E
A

N
F
I

L

T

E

R

CLEAN
FILTER

INSTALLATION INSTRUCTIONS

A. Precautions

Improper installation may damage equipment,
could endanger life, cause serious injury and/
or property damage.

1. Read Installation and Operating Instructions care­fully before attempting to start your air conditioner
installation.

2. Dometic Corporation will not be liable for any dam­ages or injury incurred due to failure in following
these instructions.

3. Installation must comply with the National Electrical
Code ANSI/NFPA-70 and CSA Standard C22.1
(latest edition and any State or Local Codes or
regulations.

4. DO NOT add any devices or accessories to this air
conditioner except those specifically authorized by
Dometic.

5. This equipment must be serviced by qualified per­sonnel and some states require these people to be
licensed.

b. For two unit installations: Install one Air Condi-

tioner 1/3 and one Air Conditioner 2/3’s from
front of RV and centered from side to side.

FIG. 2

1/2L

L

2/3L

L

1/3L

It is preferred that the air conditioner be installed on
a relatively flat and level roof section measured

with the RV parked on a level surface.
Note: A 8° slant to either side, or front to back, is acceptable
for all units.

3. After Location Has Been Selected:
a. Check for obstructions in the area where air

conditioner will be installed. See FIG. 4.

b. The roof must be designed to support 130

pounds when the RV is in motion. Normally a
200 lb. static load design will meet this require­ment.

B. Choosing Proper Location For The Air

Conditioner

This air conditioner is specifically designed for installation on
the roof of a recreational vehicle (RV). When determining your
cooling requirements, the following should be considered:

• Size of RV;

• Window area (increases heat gain);

• Amount of insulation in walls and roof;

• Geographical location where the RV will be used;

• Personal comfort level required.

1. Normal Location-The air conditioner is designed to
fit over an existing roof vent opening.

FIG. 1

2. Other Locations-When no roof vent is available or
another location is desired, the following is recom-

mended:
a. For one unit installation: The air conditioner

should be mounted slightly forward of center
(front to back) and centered from side to side.

CAUTION

It is the responsibility of the installer of this
air conditioner system to ensure structural in­tegrity of the RV roof. Never create a low spot
on the roof where water will collect. Water
standing around the air conditioner may leak
into the interior causing damage to the prod­uct and the RV.

c. Check inside the RV for return air kit obstruc-

tions (i.e. door openings, room dividers, cur­tains, ceiling fixtures, etc.) See FIG. 3 & 4.

FIG. 3

9-1/2"

28-3/4"

39"

Genesis

17"

2"

20-7/8"

18-1/2"

3/4"

17"

Standard
Grill

4

CAUTION

620412, 620415, 620425 & 620426 Series Installation Instructions

FIG. 4

4"

4"

7-1/8”

4-1/8”

21-3/8”

REAR
OF
UNIT

14-1/4" x 14-1/4”

(±1/8”) OPENING

Center Line
of Unit

7-1/8”

KEEP THESE AREAS
FREE OF OBSTRUCTIONS

12"

Air Grill Perimeter

1-1/2"

F

17"

r
o

1-1/4"

n

14-1/4 x 14-1/4
(±1/8")
Opening

t

1-1/2"

17"

1-3/4"

3"

Standard

2"

14-1/4 x 14-1/4
(±1/8")
Opening

2"

20-7/8"

Genesis

18-1/2"

R

3"

e
a
r

Grill

C. Roof Preparation

1. Opening Requirements - Before preparing the ceil­ing opening, the type of system options must be
decided upon. Read all of the following instructions
before beginning the installation.
If a roof vent opening will not be used a 14-1/4" x 14­1/4" (±1/8") opening must be cut through the roof and
ceiling of the RV. This opening must be located
between the roof reinforcing members.

There may be electrical wiring between the
roof and the ceiling. Disconnect 120 volt AC
power cord and the positive (+) 12 volt DC ter­minal at the supply battery. Failure to follow
this instruction may create a shock hazard
causing death or severe personal injury.

The 14-1/4" x 14-1/4" (±1/8") opening is part of the
return air system of the Air Conditioner and must be
finished in accordance with NFPA Standard 501C
Section 2.7.2.

2. Roof Vent Removal
a. Unscrew and remove the roof vent.
b. Remove all caulking compound around open-

ing.

c. Seal all screw holes and seams where the roof

gasket is located. Use a good grade of all
weather sealant. See FIG. 5.

FIG. 5

d. If the opening exceeds 14-3/8" x 14-3/8", it will

be necessary to re-size the opening to 14-1/4"
x 14-1/4" (±1/8").

e. If the opening is less than 14-1/8" x 14-1/8", it

must be enlarged.

3. New Opening- (Installation Other Than Vent Open­ing)
a. Mark a 14-1/4" x 14-1/4" (±1/8") square on the

roof and carefully cut the opening.

b. Using the roof opening as a guide, cut the

matching hole in the ceiling.

c. The opening created must be framed to provide

adequate support and prevent air from being
drawn from the roof cavity. Lumber 3/4" or more
in thickness must be used. Remember to pro­vide an entrance hole for power supplies, fur­nace wiring and a seven-conductor cable, 18 to
22 AWG is to be used for analog thermostat

connections.

FIG. 6

Do Not Cut
Roof Structure
Or Rafters

3/4" Min.

Good-Rafters
Supported By
Cross Beams

Frame Opening So It

Good Location­Between Roof
Rafters

Won't Collapse When
Bolting Down Unit

15" Min. At
Leave Access For Power
Supply Wiring

Front Of

Opening

It is the responsibility of the installer of this
air conditioner system to ensure structural
integrity of the RV roof. Never create a low
spot on the roof where water will collect. Wa­ter standing around the air conditioner may
leak into the interior causing damage to the
product and the RV.

5