ADVENT AIR ACTH11B (01) PDF Document

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.

Read all installation and operating instructions carefully before starting the installation.

Installation must comply with the National Electrical Code and any State or Local Codes or regulations.

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

This equipment must be serviced by qualified personnel, and some states require licensed personnel.

To prevent the possibility of severe personal injury or equipment damage due to electrical shock, always be sure the electrical power is disconnected or off before beginning installation.

There may be electrical wiring between the roof and the ceiling. Disconnect the 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 efficiency of the air conditioner is affected by conditions inside and outside the RV. Reducing the heat gain of the RV will allow the air conditioner to function with greater efficiency. Here are some suggestions:

1. Select a shaded area to park your RV.

2. Close windows and utilize the blinds and/or curtains.

3. Keep doors shut.

4. Avoid using appliances that produce heat.

Beginning the cooling process early in the day will greatly improve the air conditioner’s ability to maintain the desired temperature. In high temperature and high humidity environments, the AC should be set in Cool mode with the Fan Speed in the high position for optimal cooling efficiency.

The manufacturer of this air conditioner will not be responsible for damage caused by condensed moisture on ceilings or other surfaces. Air contains moisture, which 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 operating will minimize condensation.

If the unit does not operate, follow these troubleshooting steps:

1. If the RV is connected to a generator, check to be sure the generator is running and producing the proper power.

2. If the RV is connected to shore power, check to be sure the supply breaker is sized properly to run the air conditioner load and it is plugged into the power supply.

3. Check your fuse or circuit breaker to see if it is off.

4. After the above checks, call your local service center for further help. This unit must be serviced by qualified service personnel only.

AIR FILTER:

Remove the return air filter (after every 30 days of use) located above the removable air intake grill. Wash the filter with soap and warm water, let it dry, and then reinstall. Note: Never run the air conditioner without the air filter in place, as this may plug the unit evaporator coil with dirt and substantially affect performance.

Air Return Grill:

Clean the panel and control panel with a soft cloth dampened with a mild detergent. Never use furniture polish or harsh chemicals.

FAN MOTOR:

The fan motor is factory lubricated and requires no service.

Under certain conditions, frost may form on the evaporator coil. If this occurs, inspect the filter and clean it if it is dirty. Make sure the air louvers are not obstructed. Air conditioners have a greater tendency to frost when the outside temperature is relatively low. This may be prevented by adjusting the thermostat control knob to a warmer setting (clockwise).

Notes:

1. Consult the National Electric Code for proper sizing for wire lengths over 24 ft.

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

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

1. Before template installation, with the upper unit placed over the opening, the freeze sensor should be installed in the evaporator coil.

2. Remove the sensor from the parts bag.

3. Use a flat screw driver to create a 1/4″ gap between 2 fins (between the 2nd tube and 3rd tube) to accept the sensor.

4. Slowly press the fork and sensor into the gap created in step 3, until the clip locks onto the 3rd coil.

5. Install the template and electrical box on the ceiling.

6. Connect the sensor.

CAUTION:

1. Make sure the sensor dip is secured to the copper tube.

2. Don’t pull the wire to avoid damage to the sensor.

A. Ducting

1. The field fabricated supply ducting must attach to both sides of the ACRG. A minimum of two ducts are required, with one duct attached to each side of the plenum.

2. Each duct must have a minimum height of 1-1/2″. Maximum height cannot exceed 4″. Total free area inside each duct must be no less than 10 square inches.

NOTE: To decrease restriction and increase airflow, the ducting should make as few bends and turns as possible. When corners or turns are required, we recommend that you add radii to the corners to keep airflow at a maximum. Ten square inches of free area per duct is the minimum requirement. Larger ducting will improve airflow and system performance.

3. All field fabricated air supply ducting must be insulated to avoid condensation and prevent cooling/heating loss.

B. Registers

Cold air registers should have a minimum discharge area of 48 square inches per system, or 24 square inches per duct run.

1. U.L. approval requires the power supply to be copper conductors with minimum #12 AWG.

2. To prevent voltage drops greater than 10% during starting loads, adhere to the following guideline: For lengths greater than 50 feet, use #10 AWG.

Regarding 115VAC wiring: To prevent the possibility of shock injury from appliance operation, the WHITE wire MUST BE CONNECTED TO NEUTRAL in the service box entrance and the GREEN GROUND WIRE MUST BE CONNECTED TO A GROUNDING SCREW.

1. Place the roof top unit over the roof opening.

2. Install the freeze sensor.

3. Position the mount frame into the ceiling opening.

4. Using the four bolts provided, hold up the mount template to the ceiling. The four mounting bolts are to be inserted up through the bottom of the mount template and into the bottom of the roof unit. Tighten all 4 bolts equally to compress the gasket to 33-35 inch pounds.

5. Install the divider with foam seal against the base pan of the upper unit. On thinner roofs, the divider may be too high, so break away the additional portion. Remove the paper cover on the fixed divider, insert the loose divider against the base pan, and stick to the fixed divider.

6. Cut the insulation to the height of the divider, center insulation on the divider before removing paper backing and apply to the divider. Excess insulation will help ensure the seal at the end of the divider/frame.

7. Connect 115VAC and 12VDC wires, Thermistor (Freeze Sensor), and thermostat cable (if used) according to the wiring diagram. Install the cover over the electrical box using the small screw provided.

8. Seal all seams between the cool airside and return airside with insulation and foil tape.