atwood AC-1351, AC-1501 User Manual

LITERATURE N U M B E R MPD 15000

Rooftop Air Conditioner for Recreational Vehicles

574-206-9713

•Installation •Operation •Maintenance

Non-Ducted Models

AC-1351 & AC-1501

Effective 03/01/2013

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 http:/www.atwoodmobile.com or call

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.

BEFORE INSTALLATION

Ensure that the installation instructions have been properly read and understood. Installation must conform to Local wiring codes and regulations or, in the absence of local codes, the Standard on Recreational Vehicles, NFPA 1192. and National Electrical Code NFPA 70. DO NOT attempt to modify or add components to the installation procedure. This equipment must only be serviced by a licensed refrigeration mechanic to maintain warranty coverage. If your installation varies from the method outlined please contact Atwood Mobile Products, LLC for specialty advice.

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

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GENERAL INFORMATION

PURPOSE

This Atwood AirCommand air conditioning unit is designed for installation on the roof of a recreational vehicle to provide cooling with AC-1351 models and cooling/heating with AC-1501 models.

-The roof must be capable of supporting the weight of the unit which is 86lbs (39Kg).

-The absolute minimum thickness of the roof must not be less than 1 inch (25mm).

-The maximum thickness of the roof must not exceed 5 inches (125mm).

-Trimming of the ductwork and/or bolts may be necessary depending on the roof thickness It is important that the unit is installed properly and according to the recommended guidelines.

II.

ENSURING EFFECTIVE OPERATION

The effectiveness of the air conditioner is dependent on several factors e.g. size and heat load of the vehicle. When an Atwood unit is installed Atwood assumes that the vehicle is well insulated with 1 inch (25mm) foam minimum in all wall s and roof, that the windows are of moderate size (preferably double glazed) and the roof vents are airtight when closed. Other methods of reducing heat load include:

-Closing all doors, hatches, windows and blinds

-Position the vehicle so if porch is used, it will face the sun and protect the windows from direct radiation.

-Turning off appliances that might increase the heat load

-Ensuring the vehicle is parked in a shaded position. In periods of extreme high temperature it is recommended to start the air conditioner earlier in the morning to greatly improve its ability to cope with the expected high heat load.

III.

CONDENSATION

In areas of high humidity, the humid air within the RV will cause “sweating” or condensation in parts of the unit as the humid warm air contacts the colder air discharge system. If this occurs please ensure the following:

-Closing all doors, hatches, windows and blinds to limit the ingress of warm humid air

Avoid running the inside fan on LOW or AUTO in such conditions. Running the fan on HI fan speed will result in higher airflow and reduce the tendency to have condensation form.

INSTALLATION PARTS LIST

MAIN COMPONENTS

Atwood AirCommand

Rooftop Air conditioner

Roof Seal Gasket 2 Pcs

Adapter

4) Extension Duct

Brace Assembly

6) Plenum

7) Plenum Filters x2

FITTINGS & FIXTURES

M8 Bolts x 4

9) Hold Down Bars x 4

10)

Plenum Cover Screws x 4

11)

Self Tapping Screws x 6

INSTALLATION POSITION

Minimum 1” clearance from side grilles to any obstruction

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Minimum 8” clearance from rear grilles to any vertical face, 4” to any 45 degree face.

Unit Installation (Non-Ducted)

CAUTION

WARNING

Before beginning, mark out the position of the unit considering the following important requirements:

The air conditioner should be situated as centrally as possible on the vehicle, to ensure even air distribution.

The front of the unit MUST face the direction of travel; failure to follow this instruction will result in damage to the condenser fans.

If the vehicle is over 23’ in length, or has an unusually high heat load (see General Operating Information section regarding expectations about insulation etc.), Atwood recommends 2 or more units to cool effectively.

When considering the installation position remember to check for clearance around the plenum inside the vehicle.

Avoid an installation position where a bulkhead, cupboard or light fitting could interfere with the discharge air flow from the plenum.

It is important that the unit is never more than 5° from the horizontal and the rear of the unit should never be higher than the front.

Contact Atwood if your installation differs significantly.

ASSESS ROOF STRENGTH

The roof members MUST be strong enough to support the weight of the unit 99 lbs (45kg) without any roof deflection that will cause

“pooling” of water around the unit. Contact your

RV manufacturer to confirm the max load the roof is able to handle. If in any doubt consider the use of an external “H” frame.

If the roof does not have an existing hole one must be cut. Cut from the roof then use the roof hole as a guide to cut through the ceiling. Contact your RV manufacturer for the best method to cut through the roof.

The square hole in the roof (14” x 14”) MUST

be boxed up with minimum 3/4 inch square timber to provide a structure strong enough to withstand the compression of the installation bolts. This is also to ensure that air in not drawn from the roof cavity (Fig 3 & 4). Remember to leave access for wiring.

Longitudinals MUST be fixed securely to the transverse roof members to transfer load (see Fig 3).

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 the roof to avoid damage

POSITION UNIT ON ROOF

Remove the air conditioner from the carton.

Position the unit over the gasket so that the corners of the square hole in the RV roof line up with the corners of the square hole underneath the air conditioner (Fig 6). TIP: one person inside the RV looking through the hole while the other is on the roof adjusting the position of the unit.

Have

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CAUTION

WARNING

The unit weights approximately 86lbs (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.

Four M8 mounting holes on the chassis underneath the air conditioner will line up with the corners of the square roof hole (Fig 7).

ATTACH ADAPTER TO UNIT

Screw adapter to the underside of unit with the 4 screws provided (this step can also be done before the unit is positioned on the roof but be careful not to damage while fitting)

The adapter will only fit one way, be careful to ensure adapter is positioned correctly (Fig 8) and avoid affixing back to front.

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.

Fig 6- Position the unit over the roo f gasket and set down gently.

Position the unit so the 4 mounting holes (circled) line up with the corners.

Fig 8: Shows positioning of adapter to be attached to underside of unit. Ensure adapter is mounted the correct way, screw holes will not line up if attached out of phase.

CONNECT ELECTRICAL SUPPLY

Installation must conform to local wiring codes and regulations or, in the absence of local codes, the Standard on Recreational Vehicles, NFPA 1192. and National Electrical Code NFPA 70.

Connect AC power supply to wire leads from unit Note: Brown wire from rooftop unit to Black or Red from customer – AC Hot

Blue wire from rooftop unit to White wire from customer – AC Common Yellow/Green wire from rooftop unit to Green wire from customer - Ground

Note: Atwood strongly recommends the use of the Molex connector described on the next page.

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COC-1 Self Contained Power Connector Installation Instructions

Wire Range

AWG

Order

No.

Optional

Hand Tool

Optional Bench

Mount Tool

Optional Bench

Arbor Press

Housing

Color

12-14

19045-1000

(COC-1)

19285-0074 N/A

64006-0200

White

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

FIG. 2

Reference Information

UL File Number: E182087, CSA File Number: LR18689-C53 NEC Article: 550, 551, and 545 HUD Section: 3280.801 Current: 20A,Voltage: 300V

Installation Procedure:

1. Carefully strip and prepare the wires to the configuration as shown in Figure 1 using helpful hints shown in photographs of Figure 2.

2. Hold the clear strain relief cover with bottom facing upward as shown in Figure 3.

3. Lay wire into locator slots, making sure the black wire is placed into the polarization slot as shown in Figure 3.

4. Press the cable sheath into the integral strain relief slot as shown in Figure 3. Trimming of ground wire and possibly others will be necessary. Wires must not extend beyond the locators as shown in Figure 4!

5. While holding the strain relief cover, position the housing’s hinge posts into the hinge slots and press down until both lock into place as shown in Figure 4.

6. Close the strain relief cover and housing by hand. Place the connector assembly into Molex tool (preferred) as shown in Figure 5. Squeeze the tool until the connector bottoms out and the locking latches engage on both sides. OR alternately, squeeze the top and bottom closed with tongue and groove pliers as shown in Figure 5.1. Pliers must be a minimum of 10" long. Squeeze firmly on both sides, squarely across the connector between ribs A and B to ensure wires seat completely into slots.

7. Inspect the connector to ensure the wires have been properly engaged into the housing assembly contacts. A properly terminated wire is fully seated into its proper slots with no significant bow of the cover. If the wires extend past the insulations tops, the wires must be re-terminated with a NEW CONNECTOR. Once the cover has been closed the connector cannot be re-used. Failure to comply with this procedure may result in the failure of the connector.

8. Mating and un-mating the completed connector is illustrated in Figure 6.

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