ATMOX MAXX User manual

User’s Guide
ATMOX MAXX System
THE Complete Moisture Control System for Crawlspaces

Welcome to ATMOX
This User’s Guide will cover the basic
operation of the ATMOX System.
For instructions on installation, setup
and software adjustments, please refer
to an ATMOX Installation Manual.
Uses powerful, yet quiet fans
Creates cross circulation of air flow
Ventilates only when beneficial
Addresses odor issues
Energy efficient, uses less
than 150 watts of power
Option to incorporate a
dehumidifier
Fully automatic once installed
KEY BENEFITS
WHY ATMOX?
Issue: 2018-03 © Copyright 2018 ATMOX INC

3
Operating Principle
Crawlspaces need dry and proper ventilation. The goal of ATMOX is simple – reduce the moisture and humidity
level in your crawlspace.
The basic principle of how it works is also simple. Ventilate with “good” air from the outside only when it will
improve the conditions in the crawlspace. Using sensors, ATMOX calculates dew point inside and outside your
crawlspace to determine when the fans or dehumidifier should run. The fans allow for natural air circulation into
the crawlspace.
An optional dehumidifier, if equipped, is only used when the system cannot find “good” air from the outside,
making the system energy efficient and environmentally friendly.
Once installed, the ATMOX System will operate on its own and automatically. The system will adjust for seasonal
changes as needed. There is no need to manually make any changes to the system.

4
ATMOX Settings
The ATMOX System is a fully automatic and software-
controlled moisture management system. The system
continually measures conditions inside and outside to
determine the best course of action for your home and
crawlspace.
The system is preset to the proper settings. It is very
rare for adjustments to be necessary.
If you have inadvertently made changes by pressing
buttons, talk to your installer about setting system back
to its default settings.
Do not adjust the settings on your system without
talking to your installer. Improper settings can
negatively affect the operation of the ATMOX system.

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ATMOX MAXX System
MAXX Controller A-Box Wood Moisture Sensor
MAXX Controller B-Box High Water Alert Sensor
Outside Temperature and
Humidity Sensor
Inside Temperature and
Humidity Sensor
Standard System Components Optional Sensors
Product Specifications
Usage: Variable from 1.5-150 W
Input Voltage: 85-132V AC
Output Voltage: 12-13V DC
Output Current Range: 0-12.5A
Data Input: 2 Temperature/RH, 1 Wood Moisture, 1 Water
Power Output: 3 Switched, 1 Constant, 2 Optional
Use only approved ATMOX Fans and Accessories with the ATMOX
MAXX System

Basic System Configuration
RED OUTPUT
Fans will run
when the outside
air is beneficial.
ORANGE OUTPUT
Fans will run when the
outside air is beneficial
or when inside relative
humidity is elevated.
(Runs with Red Output
and with Yellow Output)
YELLOW OUTPUT
Fans or dehumidifiers
will run when the
outside air is not
beneficial and inside
relative humidity is
elevated.
PURPLE OUTPUT
A constant power
source for accessories.
Sensors
measure
and
provide
data to the
Controller.
6

7
Informational Display Screens
The ATMOX Controller will automatically rotate through
its standard informational screens about every fifteen
seconds.
System Screen
This screen displays the name of the ATMOX model
and the installed software version.
To view all screens, you can wait and watch as it scrolls
automatically.
For faster rotation of screens, you can manually change
the display. Press the M Button on the panel to scroll
through each of the screens.
The M Button will also light up the screen for easier
viewing.
Note: The system will continue to auto rotate even while
the M Button is being pressed.

8
Informational Display Screens
Dew Point Screen
The Dew Point Screen displays the dew point outside
and inside the crawlspace.
Temperature Screen
The Temperature Screen displays the temperature
outside and inside the crawlspace.
The ATMOX system evaluates the outside and inside temperature
to determine whether or not to ventilate the crawlspace. If the
temperatures are too cold or too hot based on several calculations,
the system will not ventilate with outside air. The ATMOX system
automatically adjusts its temperature parameters for different times of
the year.
Note: If the outside sensor is located in direct sunlight, it will often
heat the metal housing causing the sensor to read a temperature that
is higher than the ambient outdoor temperature. The overall outside
moisture calculations (dew point) will not be incorrect, so this generally
does not affect basic operation of the ATMOX system in determining
when fans should be running.
Dew point is the key to the ATMOX system. Dew point is calculated
from the temperature and humidity measurements and gives you the
best indicator of moisture in the air. A higher dew point means there
is more moisture in the air, and a lower dew point means there is less
moisture in the air. The ATMOX system does not activate ventilation
on an absolute number but instead uses a comparison of air in the
two locations. Under most circumstances, the fans will ventilate when
the outside dew point is 1 to 1.5 degrees lower than inside dew point.
There are some exceptions to this built into the software, for example
temperature parameters need to be met. There is also a time delay
of 15 to 30 minutes to conserve energy and avoid constant on and
off. This means that you will not always see instantaneous change in
operations.

9
Informational Display Screens
Wood Moisture Screen
The Wood Moisture Screen displays the wood moisture
content from the optional sensor in the crawlspace.
Relative Humidity Screen
The Relative Humidity Screen displays the relative
humidity outside and inside the crawlspace.
Relative humidity is measured by the sensor along with temperature
in each location and is used to calculate dew point. An important
component of relative humidity is the word “relative.” Humidity is
relative to temperature and can fluctuate significantly with changes in
temperature. ATMOX ventilates based on a dew point comparison for
this reason. It is possible for the humidity outside to be higher than
inside but to still trigger fans to run. It all depends on the corresponding
temperature. In general, the ATMOX system is not looking to target an
exact humidity level but instead is looking to have variations mirroring
the outdoors. The goal is not to have extremely high humidity in the
crawlspace for extended periods of time.
There are some operations on the ATMOX system that are triggered by
inside humidity levels. Under default settings, if the crawlspace humidity
exceeds 80%and outside dry air is not beneficial, then the controller
will activate the Orange and Yellow outputs used for internal fans and
an optional dehumidifier. Once activated, the fans and/or dehumidifier
will continue operation until the inside relative humidity is below 75%or
when outside air is drier. Your system will automatically trigger these
outputs even if your setup does not have a dehumidifier or internal fans.
The relative humidity setting to activate Yellow and Orange outputs is
adjustable. Contact your installer if you have questions about custom
settings.
If the wood moisture sensor is not installed, then the display will read
N/A. If the sensor is installed, then the wood moisture from the sensor
will be displayed.
Wood moisture is a great tool in evaluating the actual moisture in
a crawlspace. The wood moisture will vary throughout the year. In
general, 10%-16% wood moisture content is a healthy range for a
vented crawlspace. The ATMOX system has an alert to notify you if
the wood moisture reading is too high. Under the default setting, the
alert is triggered at 20%and once activated will not turn off until wood
moisture content decreases below 18%. If desired, this setting can be
adjusted. Contact your installer if you have questions about custom
settings.

10
System Operation, Alarms and Alerts
MANUAL
Under normal automatic operation, this light
is not illuminated. If the Manual light was
accidentally illuminated, it can be turned off by
pressing the bottom Arrow button one time to
turn off.
WINTER
When this light is illuminated, the system
is operating in its winter mode. When not
illuminated, the system is operating in
its summer mode. The system adjusts
automatically between these modes.
TEMP ALERT
This light indicates the crawlspace
temperature is very low. If lit, all fans and/or
dehumidifier will not operate.
ALARM
This light Indicates there is an alert on the system.
Check screen to identify the reason for alarm.
FANS and DEHU
When Fans light is on, the outside conditions are
better and the fans will be operating.
When Dehumidifier light is on, the outside air is
not beneficial AND the relative humidity inside the
crawlspace is elevated.
BOTH LIGHTS OFF
When both lights are off, the outside air is not beneficial and no fans are
running. Crawlspace humidity is not elevated, and ATMOX system is
“waiting” for any change in conditions.
FLASHING LIGHTS
Either or both lights may be flashing at times. This means the system is
in a time delay for switching between operations.
ATMOX MAXX System