Atwood AC-1361, AC-1511 Installation Operation & Maintenance

LITERATURE NUMBER MPD 15078

574-206-9713

•Installation •Operation •Maintenan

This air conditioner design has been certified by the Canadian
Standards Association for installation in recreation vehicles.

SERVICE CALLS & QUESTIONS

Location and phone numbers of qualified Service Centers can
be found at our website

866-869-3116 to locate a Service Center.

WARNING: It is important that this installation

manual is read and understood before
installation. The unit must be installed by a
qualified service technician. Failure to properly
install the unit or attempting to modify it in any
way can be extremely hazardous and may
result in property damage and personal injury
and will void the warranty.

http:/www.atwoodmobile.com

ce Effective 07/31/2013

or call

BEFORE INSTALLATION

Ensure

that the installation instructions have
properly read and
Installation must conform
regulations or, in the
Standard on Recreational Vehicles, NFPA 1192.
National Electrical Code NFPA
DO NOT
installation procedure.
This equipment must
refrigeration mechanic to maintain warranty
coverage.
If
please contact Atw
advice.

Atwood will not be held responsible for problems
relating to incorrect or improper installation
methods.

attempt

your installation varies

underst

to

ood.
to

Local wiring codes

absence

modify

only be serviced by a license

ood Mobile Pr

of

local codes,

70.

or

add components

from the method

oducts, LLC

been

and

the

and

to the

d

outlined

for specialt

y

GENERAL

Rooftop
for

Recreational

Air

Conditioner

Ducted Models

AC-1361 & AC-1511

INFORMATION

Vehicles

I. PURPOSE

This Atw
for installati
provide cooling
with AC1511 models.

-The
unit which is 86lbs (39Kg).

-The absolute minimum thickness
less than

-The
5 inches (125mm).

-Trimming
depending on
It
according

ood

AirCommand

on on

the roof of a recreational

with AC1361 models and cooling/heating

roof must be capable

1 inch (25mm).

maximum thickness

of the ductwork and/or bolts may be necessary

the roof thickness

is important

that the unit

to the

recommended guidelines.

air conditioning unit

vehicle

of supporting the weight

of the roof must

of the roof must

is installed properly

not exceed

is designed

to

of the

not be

and

II. ENSURING EFFECTIVE OPERATION

The effectiveness of the
s

everal factors
an Atwood
vehicle is
in all

walls and
(preferably double glazed) and
when closed. Other methods of

-Closing all doors, hatches, windows and blinds

-Position the
and protect

-Turning

-Ensuring
In

periods
to start the air conditioner earlier
improve its ab

e.g. size and heat load

unit

is installed Atw

well insulated

roof, that the wi

vehicle so

the wi

off

appliances

the

vehicle is parked

of extreme

ility

air conditioner is dependent

of the

vehicle. When

ood assumes

with 1 inch (25mm) foam minimum

ndows are

the roof vents are

reducing heat load

if

porch is used,

ndows

from direct

that might

high temperature it

to

cope

with the expected high heat

radiation.

increase

in

a shaded position.

in the

that the

of moderate size

it will

face

the heat

is

morning

on

airtight

include:

the sun

load

recommended

to greatly

III. CONDENSATION

In areas
cause “sweatin
humid warm air contacts
this

-Closing all doors, hatches, windows and blinds
ingress

­c
higher airflow and reduce
c

of

high humidity, the

g” or condensation in parts of the unit

occurs please ensure

of

warm humid

Avoid running

onditions. Running

ondensation form.

the

humid air

the

colder air discharge system. If

the following:

air

inside fan on LOW

the

fan on HI fan speed

the tendency to have

within the

or

AUTO

will result

RV

will

as

to limit the
in such

in

load.

the

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2 3 5

7 9 4

6

8

Installation Guide – Ducted Atwood Air Command

Exploded view of Installation Parts

1. Air Command Cormorant Rooftop Air Conditioner

2. Polystyrene baffle x 1

3. Plenum deck assembly x 1

4. Hold down bars x 4

5. Filter x 1

6. Hold down bolts M8 x 4

7. Plenum fascia x 1

8. Screw, button head 20mm x 6

9. Cover plugs x 6

10. Control Pad & Extension cable (not shown)

11. Roof sealing gasket (not shown)

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Minimum 1 inch clearance from
side grills to any obstruction.

Minimum 8 inch clearance from

45 degree face.

INSTALLATION POSITION

rear grills to any vertical face.
Minimum 4 inch clearance to any

Unit Installation

Before beginning, mark
considering

-

The air conditioner should be situated as centrally

possible on

-

The
travel;
damage

- If the
high heat load (see General Operating Information
section regarding expectations about insulation etc
Atwood
effectively.

-

When considering
to

check

vehicle.

-

Avoid an installation position
cupboard
discharge air

the

following

the

vehicle,

front of the unit MUST

failure

to follow this instruction

to the

condenser fans.

vehicle is over 23’

would recommend

for

clearance around

or light fitting could

flow from the plenum.

out the position

important requirements:

to

ensure

face

in length,

2 or

the installation position remember

the

where a bulkhead,

interfere

of the unit

even

air distribution.

the direction

will result

or

has

more units to cool

plenum inside

an

unusually

with the

of

CAUTION

It is important that the unit is never more
than

5⁰ from the horizontal and the rear of
the unit should never be higher than the
front.

in

the

as

.),

- Contact Atwood

if

your installation differs significantly.

ASSESS ROOF STRENGTH

-

The

roof

s

upport

the weight
that will
manufacturer to
doubt

- If the roof
roof then use
your

-

The square hole
minimum 3/4 inch
withstand the compressi
that
access

- Longitudinals MUST
to transfer

cause

consider

RV manufacturer

air

is not

for wiring.

members

does

load

MUST

of the unit

“pooling” of

confirm

the

use

not

the roof

in the roof (14” x 14”)

square timber

drawn

(see Fig

be strong enough to

water around

the

max

of an externa

have an existing hole

hole as a guide

for the best met

on

of the installation bolts.

from the roof cavity

be fixed securely

3).

86

lbs

(39kg)

without

the unit. Contact

load the roof

l “H” frame.

one must be cut. Cut

to cut through

hod

to cut through

MUST

to

provide a structure strong enough

(Fig

3 &

to the transverse roof

any

is able

to

handle.

the

ceiling. Contact

be boxed up

This is also

4). Remember

roof deflection

your

RV

If in

any

from the

the roof.

with

to ensure

to

leave

members

to

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.79 MIN

WARNING

There may be electrical wiring located between
the roof and ceiling. Ensure that power is
properly disconnected at the supply (mains
and/or battery). Failure to do so may result in
personal injury or death

TIP:

Always use crawl boards across

damage

POSITION UNIT ON ROOF

-

Remove

- Position the unit
the
of the
the

TIP:

hole while
of the unit.

the

air conditioner

over

the gasket so

square hole

square

air conditioner (Fig

Have one person inside

in the RV roof

hole

the other

underneath

6).

is on

from the carton.

the RV

the roof adjusting the position

the roof to

that the

line up

with the

looking through

avoid

corners

corners

of

the

Fig 6- Gently set the unit over the roof gasket..

WARNING

The unit weights approximately 86 lbs (39kg).
Ensure a two person lift or use a mechanical
hoist to avoid the risk of injury.

-Do NOT slide the unit on the roof. This may
damage the gasket and result in leaks.

- Position the unit so that the four M8
mounting holes will line up with the four
corners of the square roof hole (Fig 7).

Fig 7- Shows the view from under the roof.

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Roof Thickness ­Inch (mm) –
Include ‘H’
frame if

Duct length
required – Inch
(mm)

Hold down bolt
length required
– Inch (mm)

4.92 (125)

5.71 (145) as
supplied

As supplied

3.94 (100)

4.72 (120) - Cut
.98 (25)

As supplied

3.15 (80)

3.94 (100) –
Cut1.77 (45)

As supplied

2.36 (60)

3.15 (80) – Cut

2.56 (65)

Cut 1.97 (50)

1.57 (40)

2.36 (60) – Cut

3.35 (85)

Cut 2.76 (70)

1.0 (25)
(absolute

1.57 (40) – Cut

3.94 (100)

Cut 3.35 (85)

Interconnection diagram for AC models

RED

BLACK

BLUE

BLUE

RED

+12v

-12v RET

ROOFTOP AC UNIT

WALLMOUNTED
THERMOSTAT

+12V SUPPLY
(CONVERTER)

FURNACE

4-WIRE CABLE

115 VAC

DETERMINE ROOF THICKNESS

-Measure the roof thickness and consult the table on next
page to check if adjustments to the hold down bolt and duct
length are required.

INTERCONNECTION CABLES

Three sets of interconnecting cables must be installed before
installing the rooftop unit. The three sets of cables are for
+12V power, connecting to the furnace, and a
communication cable between the wall mounted thermostat
and the rooftop unit.

+12V Power Connections



Customer provided +12V to the red wire in the

rooftop unit



Customer provided -12V return to the black wire in

rooftop unit

Furnace Connections



Furnace output wire to one of the blue wires in the

rooftop unit



Furnace input wire to the other blue wire in the

rooftop unit
These two connections are interchangeable since
the blue wires are connected to a relay contact in
the rooftop unit

Communication Connection



This is a 4-wire cable (supplied by Atwood) which

connects the wall mounted thermostat to the rooftop
unit.

with wall-mounted thermostat

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CONNECT AC ELECTRICAL SUPPLY

Wire Range

AWG

Order

No.

Optional

Hand Tool

Optional Bench

M

ount Tool

Optional Bench

Arbor Press

Housing

Color

12-14 19045-1000

(COC-1)

19285-0074 N/A

64006-0200

White

Installation must conform
on Recreational Vehicles, NFPA 1192.

- Connect AC

- Note:

power supply

Brown wire from rooftop
Blue wire from rooftop unit
Yellow/Green wire from rooftop unit to Green wire from customer – Ground

to

local wiring codes and regulations

and National Electrical

to wire

leads

from unit

unit to Black or Red wire from customer – AC Hot

to White wire

from customer

or, in the

Code NFPA

– AC

Common

absence

70.

of local

codes,

the Standar

d

WARNING

Ensure that power is properly disconnected at the supply (mains and/or battery).
Failure to do so may result in damage to the unit and personal injury or death.

AC connections can be made following the COC-1 procedure below using the connector: Atwood PN 15024.

COC-1 Self Contained Power

For 2 Wire Cable With Ground Applications

The 2-circuit-with-ground connectors will splice non-metallic-sheathed cable in the following wire ranges and types:

Self Contained Connector
2 Circuit with ground for Solid Wire

Referenc

e Information

UL File Number: E182087,
CSA File Number: LR18689-C53
NEC Article: 550, 551, and 545
HUD Section: 3280.801
Current:

20A,Voltage:

-

300V

Connector Installation Instructions

FIG. 2

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