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.

5
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

11
B-Box Components Overview
Sensors are attached to B-Box via telephone wire and jacks.
The Display A-Box is connected to the B-Box via telephone wire
and jacks.
The ATMOX System sends signal and power to the fans, relays and
other accessories via low voltage 12v DC power.
Each color represents an output for a different function of the
system. Color-coded plugs connect the low voltage wire to the
B-Box.
Data Transmission Light
There is a small light on the B-Box.
If the light is flashing quickly, then data is not being received from A-Box.
If the light is pulsing slowly, then data is being transmitted or received
from A-Box.

12
System Notifications
System notifications are designed to alert you of a potential problem. The following are all possible alerts:
High Water Alert
If the system has an optional
ATMOX water sensor, this alert
is triggered by standing water in the location of the water
sensor. The water sensor is generally used in a sump pump
or condensate line. The location of the water sensor should
be checked if this alert is triggered.
Wood Moisture Too High
If the system has an optional
ATMOX wood moisture sensor,
this alert is triggered by moisture levels that are higher than
they should be in the crawlspace. The crawlspace should
be checked to determine cause.
Humidity Too High
Under the system default
settings, this humidity alarm
setting is turned to the off position, so it may not be active
on your system. If this alert is on for a brief period of time,
there is no reason for concern as humidity can fluctuate. If
this alert is on for an extended period of time, the crawlspace
should be checked.
Box B : Check B
There is a data connection
problem with the wire between the A-Box and B-Box.
Contact your installer or ATMOX for more information.
Missing, None, Defect (Def), with Inside or Outside Sensor
Any of these alerts indicate that there is a data connection
problem with the corresponding sensor. First, try to restart
the system to clear the error. Second, check the telephone
wires and couplers between the B-Box and the sensor
to see if anything is unplugged or damaged. If sensor is
still not reading, contact your installer or ATMOX for more
information.

13
Frequently Asked Questions
What happens if we have a blackout or power outage?
The ATMOX System obviously runs on electricity, so there will be no operation when the system does not have
electrical power. When the power comes back on, the ATMOX system will automatically restart and continue
normal operation. All settings are retained so there is no need to do anything.
Will the fans running cause too much cold air to be brought in during the winter?
The system adjusts for Summer and Winter ventilation modes. The fans will not bring outside air into the
crawlspace below a set temperature setting.
It is raining outside and the fans are running. What is wrong?
The answer is probably nothing. You have to trust the system even when it doesn’t seem intuitive. The fans will
be activated by dew point and not humidity levels. If a cold front comes through (even with rain), it is possible
that the colder air will have a lower dew point than what is in the crawlspace. The air with the lower dew point
will be beneficial to the crawlspace.
I have an alarm or a question, who should I contact?
Contact your local installer first as they will have more information about the specifics of your home and system.
For any additional information or questions, contact ATMOX by phone at 704-248-2858 or email [email protected].

14
Maintenance
As a homeowner, ATMOX suggests a periodic maintenance
inspection of your ATMOX system and crawlspace by your
installer. Conditions in and around your home are always
changing. Please be aware of the following during other
times of year:
Power Connection
If the ATMOX display screen is not showing any readings, it
most likely has no electrical power and is not operating. In
this case, see if something is unplugged or make sure that
the outlet being used for the B-Box has power. If the A-Box
has no display or if the B-Box has no power, then contact
your installer for more information.
System Alarms
If the ATMOX system has an alarm such as missing hardware,
then the system will not operate. Please check periodically to
make sure that the display has no alerts needing attention.
Fan Operation
The ATMOX fans or vent covers should periodically be
brushed off lightly to keep debris such as mulch or pine
needles from blocking ventilation. The ATMOX display does
not give a notification if any single or group of fans are not
operating. Fans should periodically be checked for operation.
Moisture Management
vs.
Water Management
It is important to note that the ATMOX system is a moisture
management system and not a water management system.
Dry air or a dehumidifier cannot get rid of standing water
in the crawlspace. Every effort should be made to drain
water away from the foundation. Gutters should be cleaned
out, and downspouts should drain away from the house. If
you have water intrusion in your crawlspace, this needs to
addressed separately from or in addition to your moisture
problem.
If you live in a very humid climate and have excessive
ground moisture being released into the crawlspace during
peak summer months, it may be necessary to incorporate
an optional dehumidifier with the ATMOX system. Most
homes do not need a dehumidifier, but there are exceptions.
Contact your installer if you have questions about your
situation or need more information.

15
ATMOX Limited Three-Year Warranty
When installed, operated, used and maintained as intended in residential applications and according to the instructions supplied with
ATMOX products, ATMOX warrants its products for a period of 3-years from the date of purchase against any defects in material and
workmanship. The products covered by this warranty include the control boxes, fans, sensors and wiring manufactured by ATMOX.
ATMOX will repair or replace, at ATMOX’s option, any ATMOX product or component found to be defective within the 3-year warranty
period.
ATMOX products are designed to improve conditions in the crawlspace, basement or attic, yet are limited by atmospheric and natural
conditions over which ATMOX has no control and which are not covered by this warranty. ATMOX products are not warranted against
damage caused by electrical surges, fire or other casualty, vandalism, or acts of God (including lightning strikes and floods). This
warranty does not make representations regarding mold, insects, termites, water, rot, electrical, HVAC, roof, framing, foundation, floors,
drywall, gutters, ice dams or other problems that may occur in a house structure. The warranty does not include any costs of removal or
reinstallation.
Third-party products by other manufacturers sold by ATMOX (such as dehumidifiers) are not covered by this warranty but may be
covered under separate warranties by the product’s manufacturer. Purchaser should contact third party manufacturers for warranty
claims and coverage of third-party products not manufactured by ATMOX.
ATMOX INC’S LIABILITY UNDER THIS LIMITED WARRANTY IS STRICTLY LIMITED TO REPAIR OR REPLACEMENT OF DEFECTIVE
ATMOX PRODUCTS. OTHER THAN THE WARRANTIES EXPRESSLY DESCRIBED HEREIN, ATMOX DISCLAIMS ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE. ATMOX WILL NOT BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES.
Some states do not allow certain limitations and exclusions of warranty, so these exclusions may not apply to you. This warranty gives
you specific legal rights, and you may also have other rights, which vary from state to state.

ATMOX INC
10612-D Providence Road #229
Charlotte, NC 28277
Phone: [phone]
Fax: [phone]
Email: [email protected]
Website: www.atmox.com