Maxxair MAXXFAN Plus 4500K

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Summary

MAXXFAN Installation and Operating Guide

Installation Instructions

Step-by-step guide for installing the MAXXFAN on RV roofs.

MAXXFAN Manual Opening Models Operation

MAXXFAN Plus Models Operation

Vent Lid Operation

Manual and automatic operation of the vent lid.

MAXXFAN Plus Remote Control Operation

Remote Control Functions

Operation of fan, vent lid, and auto mode via remote.

Thermostat and Fan Speed

Adjusting temperature set points and fan speeds with the remote.

Overview

Function Description
Usage Features
Installation
Roof Thickness Compatibility
Garnish Trim Ring
Vent Lid Operation
Fan Control (Keypad/Remote)
Safety Features
Maintenance Features
Cleaning
Insect Screen Removal
Battery Replacement (Remote Control Models)
Serial Number Location
Warranty

The MAXXFAN® is a versatile ventilation system designed for recreational vehicles (RVs), offering a range of models with various features for optimal comfort and air circulation. It is designed to fit into a standard 14 by 14-inch RV roof opening.

Function Description:

The primary function of the MAXXFAN is to provide ventilation within an RV cabin by either drawing fresh air in (intake) or expelling stale air out (exhaust). Many models also offer a "Ceiling Fan Mode" where the vent lid can be closed while the fan motor continues to run, circulating air within the cabin without opening to the outside. This is particularly useful for maintaining air movement in various weather conditions.

The MAXXFAN operates on a 12-volt DC, 5-amp service. Depending on the model, it can be controlled manually via a knob, through a keypad on the unit, or with a wireless remote control.

Usage Features:

Installation:

The MAXXFAN is designed for straightforward installation into a standard RV roof opening. It requires the removal of any existing roof vent and old sealant. The unit must be centered in the roof opening with the lid hinge facing the front of the vehicle. Proper sealing with butyl tape and a compatible caulk (such as Dicor self-leveling lap sealant) is crucial to prevent leaks. It's important to avoid sealants containing solvents like Xylene, Toluene, Methyl Ethyl Ketone, Acetate, Acetone, or Polysulfide (Thiokol) as these can damage the flange. Electrical connections involve connecting the vehicle's 12-volt positive supply to the MAXXFAN's black wire (marked with a tag showing (+)).

Roof Thickness Compatibility:

MAXXFAN Mini (Models 4301M, 4401M): Designed for a minimum roof thickness of 1 inch to a maximum of 6 1/2 inches.
MAXXFAN/MAXXFAN Plus (all other models): Designed for a minimum roof thickness of 2 inches to a maximum of 6 1/2 inches. If the roof is thinner than 2 inches, additional thickness must be built at the ceiling opening using wood or other suitable material.

Garnish Trim Ring:

The interior Garnish Trim Ring needs to be trimmed to fit the specific RV roof thickness. This involves measuring the distance from the ceiling surface to each corner of the MAXXFAN Control Plate and cutting the garnish ring 1/4" to 1/2" longer than these measurements to ensure a snug fit.

Vent Lid Operation:

Manual Opening Models (e.g., 4301M, 4401M, 4201KW, 4251KW, 4301K, 4401K): These models feature a knob for opening and closing the vent lid. For MAXXFAN Mini models, the knob also serves as a locking mechanism for transport or high wind situations. For MAXXFAN and MAXXFAN Plus models, the knob is pushed "IN" to lock the lid when open or closed. It's important not to use excessive force when operating the knob.
Automatic Opening Models (e.g., 4000K, 4001K, 4002K, 4050K, 4500K, 4501K, 4541K, 4700K, 4751KS, 4761KS, 4800K, 4801K, 4900K, 4951KS): These models feature a motorized vent lid that can be opened and closed via keypad or remote control. The knob on these models allows for manual closing of the vent lid in case of RV power loss but does not lock.

Fan Control (Keypad/Remote):

ON/OFF: Starts or stops the fan. On automatic opening models, this also opens or closes the lid.
Speed Control: Allows adjustment of fan speed, typically cycling through multiple speeds (e.g., four speeds for manual opening keypad models, ten speeds for remote control models).
IN/OUT (Intake/Exhaust): Reverses the direction of the fan to either draw air in or push air out. On some models (Exhaust Only models), this key is removed. In Auto Mode, the fan direction is automatically set to Exhaust but can be overridden.
AUTO Mode (Thermostat Control): Available on many models, this mode allows the fan and lid to operate automatically based on a set thermostat temperature. The fan turns ON and the lid opens when the cabin temperature rises above the set point, and the fan turns OFF and the lid closes when the temperature cools. The initial factory set point is 78°F, which can be adjusted using arrow keys. A green LED indicates Auto Mode is active. If 12-volt RV power is removed, the thermostat resets to 78°F.
Ceiling Fan Mode: By closing the vent lid while the fan motor is running, the unit enters Ceiling Fan Mode, circulating air within the RV cabin without external ventilation.
Rain Sensor (Automatic Opening Models Only): If the Rain Sensor circuit detects moisture, it automatically turns OFF the fan and closes the lid. If a key is pressed while the sensor is wet, the unit will beep three times. Pressing the FAN ON key restarts the fan after the sensor has dried. The Rain Sensor can be deactivated, indicated by a red LED, but caution is advised as rain could enter the RV. Note that the Rain Sensor will not close the lid if it was opened manually with the knob.
Vent Lid Position (Remote Control Models): Allows opening or closing the vent lid independently of the fan. This button is not active in Auto Mode.
Remote Control (Optional for many Plus models): Wireless remote controls offer comprehensive control over all fan functions, including ON/OFF, speed, intake/exhaust, Auto Mode, thermostat settings, and vent lid position. They typically feature a display screen showing current settings, room temperature, set temperature, fan speed, and battery status. A cradle is provided for wall-mount storage of the handheld remote.

Safety Features:

Self-Resetting Fuse: MAXXFAN Plus models incorporate a self-resetting fuse on the circuit board in the ceiling assembly. It can be reset by removing and re-applying power.
Warning for Power Disconnection: Users are cautioned to disconnect main vehicle power before connecting 12-volt DC power to the MAXXFAN.
No Operation with Screen Removed: Users are warned not to operate the fan with the insect screen removed.
No Probing/Tampering: Users are advised not to probe or tamper with the thermostat sensor or IR sensor.

Maintenance Features:

Cleaning:

All parts of the MAXXFAN should be cleaned with mild soap and water only. It is crucial to avoid petroleum-containing additives or solvent-based products, as well as chemicals like Ketones, Esters, Acetone, Xylene, Toluene, Methyl Ethyl Ketone, Acetate, Amines, Aromatic Hydrocarbons (including Loctite Formulas), or Polysulfide (Thiokol) type sealants. These can damage the plastic components and cause cracking or product failure. When cleaning, ensure the MAXXFAN is OFF and the vehicle's 12-volt power is removed.

Insect Screen Removal:

The insect screen is designed for easy removal by rotating four retaining knobs 1/2 turn. This allows for cleaning of the screen.

Battery Replacement (Remote Control Models):

Remote control models require two AAA batteries. The remote typically has a low battery indicator on its display screen, showing one or zero power bars when batteries need replacement.

Serial Number Location:

The serial number label is located underneath the round insect screen, or on the back page of the manual and on the fan control plate under the round insect screen frame. This is important for warranty claims and product identification.

Warranty:

The MAXXFAN comes with a 2-year limited warranty covering defects in material and workmanship from the date of purchase. It covers parts only and does not include labor, transportation costs, or damages due to misuse, improper installation, or "Acts of God." For warranty considerations, customers are directed to contact AIRXCEL/MAXXAIR Ventilation Solutions Customer Service.