ADVENT AIR ACM135 (01) PDF Document

The ADVENT AIR ACM135 air conditioner / heat pump is designed for the following specific conditions:

1. Installation on a recreational vehicle (RV).

2. Mounting on the roof of a recreational vehicle.

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

4. Roofs that are 2.5″ to 5.5″ thick.

The efficiency of the ADVENT AIR ACM135 is affected by the conditions inside and outside of the RV. Reducing the heat gain of the RV will allow the unit to function with greater efficiency. Here are some suggestions to reduce heat gain:

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

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 ADVENT AIR ACM135 removes this moisture from the air during its cooling operation. To minimize condensation, keep doors and windows closed when the air conditioner / heat pump is operating.

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.

If the ADVENT AIR ACM135 unit does not operate, perform the following checks:

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 / heat pump load and it is plugged into the power supply.

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

4. After performing the above checks, if the unit still does not operate, it must be serviced by qualified service personnel only.

1. 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 / heat pump without putting the air filter back in place. This may plug the indoor coil with dirt and may substantially affect the performance of the unit.

2. 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.

3. FAN MOTOR:

The fan motor is factory lubricated and requires no service.

Under certain conditions, frost may form on the indoor coil of your ADVENT AIR ACM135. If this should occur, inspect the filter and clean it if dirty. Make sure the air louvers are not obstructed. Air conditioners / heat pumps have a greater tendency to frost when the outside temperature is relatively low. This may be prevented by adjusting the thermostat control to a warmer setting.

Location:

The unit is designed to fit over an existing roof vent opening, which is normally 14-1/4″ x 14-1/4″ ±1/8″.

• For one unit installation: The air conditioner should be mounted slightly forward of the RV’s center (front to back) and centered from side to side.

• For two unit installation: Install one unit 1/3 of the distance and the other unit 2/3 of the distance from the front of the RV, centered from side to side.

• It is preferred that the unit be installed in a relatively flat and level roof section (measured with the RV parked on a level surface). However, up to a 15-degree slant to either side, or front-to-back is acceptable.

• A minimum clearance of 18″ is required from the rear section of the air conditioner to any other roof mounted object.

Roof Preparation:

WARNING: 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.

• Existing Roof Vent Removal: Unscrew and remove the roof vent, remove all caulking compound around the opening, and seal all screw holes and seams where the roof gasket will be located using a good grade of all-weather sealant.

• New Opening: A 14-1/4″ x 14-1/4″ +1/8″ opening must be cut through the roof and ceiling of the RV. It is recommended this opening be located between roof framework. Using the roof opening as a guide, cut the matching hole in the ceiling.

1. If the opening exceeds 14-3/8″ x 14-3/8″, it will be necessary to install spacers.

2. If the opening is less than 14-1/8″ x 14-1/8″, it must be enlarged.

3. Route a 12/3 Romex type supply line from the circuit breaker box to the front of the roof opening.

a. The power supply must be on a separate 20 amp Time Delay Fuse or HACR Circuit Breaker.

b. Wiring must comply with all National, State and Local wiring codes.

c. Make sure at least 15″ of wire extends into the roof opening to ensure easy connections.

4. The opening must be framed to provide adequate support and prevent air from being drawn from the roof cavity. Lumber 3/4″ thick or more and long enough to bridge the opening must be used. Remember to provide an entrance hole in the front of the opening for 110v, 12v, and thermostat wires.

5. The 14-1/4″ x 14-1/4″ (+1/8) roof opening is part of the return air duct and must be finished in accordance with NFPA standard 501C, Standard for Recreational Vehicles, Section 2-7.

CAUTION: It is the responsibility of the installer of this 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/heat pump may leak into the interior causing damage to the product and RV.

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 ¼” 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 clip is secured to the copper tube.

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

For units with a preinstalled freeze sensor clip, insert the copper sensor from the Ducted Ceiling kit into the clip. Wrap the wire around the clip for strain relief and connect it to the Control Box Mating Connector.

The ACRG15 Air Return Grill is designed for systems that use field-fabricated (OEM supplied) air ducting. The requirements are:

1. The ACRG must be installed under the roof opening. It bolts to the underside of the roof unit. Compression of the framed ceiling cavity between the roof unit and the ACRG holds both components in place.

2. Roof thickness must be at least 2.5″.

3. The ceiling cavity depth (measurement from ceiling to roof) must be a minimum of 2.5″ and a maximum of 5.5″.

4. The 115 VAC service for the air conditioner must be routed into the ACRG. 12VDC should be routed to the digital control box. If a LP furnace is being used, a control wire must be connected from the furnace to the digital control box.

5. The ACRG has a 6-pin, two 3-pin & two 2-pin connectors extending from the front of the relay kit. These connectors mate with the air conditioner / heat pump. When making this connection, verify that the plugs are properly aligned and have snapped together securely.

6. If the roof thickness is greater than 2.5″, you MUST use the additional divider plate provided with the ACRG to separate the warm return air from the cold supply air.

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, it is recommended that you add radii to the corners to keep airflow at a good level and maintain system performance.

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

B. Registers

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

1. Place the air conditioner / heat pump over the roof opening.

2. Install the freeze sensor. Some units may contain a preinstalled plastic retaining clip for the freeze sensor. If present, use this clip and discard the one that came with the sensor. Insert the freeze sensor into the plastic clip, ensure it’s secured, and connect the harness to the relay box mating harness.

3. Position the mount frame into the ceiling opening.

4. Using the four bolts provided, hold up the mount template to the ceiling. Insert the four mounting bolts up through the bottom of the mount template and into the bottom of the air conditioner / heat pump. Tighten all 4 bolts equally to compress the gasket to 33-35 inch pounds. When moving the unit, be sure not to damage the gasket by sliding it across the roof.

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 it to the fixed divider.

6. Cut the insulation to the height of the divider, center it on the divider before removing the 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, Freeze Sensor Thermistor, Heat Pump specific thermistors (Outdoor Coil, Outdoor Ambient), and thermostat cable according to the wiring diagram. Install the cover over the electrical box using the small screw provided.

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

IMPORTANT: When connecting the wires:

1. Make any adjustments required to relieve pinched or stressed wiring.

2. Remove 1/4″ insulation from the 4 wires. Use a small Flat-head screwdriver to loosen the wire terminal screws. Push each corresponding wire into the proper terminal hole and tighten each screw.

The DIP switches on the thermostat configure the available functions for your ADVENT AIR ACM135 system. The default setting is 1 OFF, 2 OFF, 3 ON. If the switches are not set properly, the LCD will display “Er”.

Dip Switch Functions:

• Dip Switch 1: Off = Heat Strip function disable, On = Heat Strip function enable

• Dip Switch 2: Off = Heat Pump function disable, On = Heat Pump function enable

• Dip Switch 3: Off = Furnace function disable, On = Furnace function enable

Mode Cycle Configurations:

Connecting 115VAC Wiring

1. WARNING – SHOCK HAZARD: 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.

2. Route the 115VAC supply wiring, previously routed into the frame of the roof opening, through the strain relief of the electrical box and into the high voltage wiring area.

DANGER: 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.

Attach Ceiling Grill

1. Position the grill next to the interior frame and attach it with the provided screws.

2. Install the filter on the air intake grill section.

3. Snap the intake grill section onto the main grille.

4. Install the screw covers.