Build Equinox CERV2 User manual

USER’S GUIDE
CERV2 Touchscreen Interface
Build Equinox
[email protected]
(773)-492-1893
Rev 1.0 - 07/09/2018
© Build Equinox 2018
USER’S MANUAL

Contents
Controller Overview .............................................................................................................................................................................4
Connecting The Wireless Controller.....................................................................................................................................................4
Home Screen ........................................................................................................................................................................................7
Heating and Cooling Setpoints .............................................................................................................................................................8
CO2/VOC and Ventilation Setpoints.....................................................................................................................................................9
Recirculation.......................................................................................................................................................................................10
Trigger Ventilation..............................................................................................................................................................................11
Wireless Device Setup ........................................................................................................................................................................12
Wired Auxiliary Outputs .....................................................................................................................................................................15
Wired Auxiliary Inputs........................................................................................................................................................................18
CERV Operation Mode........................................................................................................................................................................21
ECM Fan Settings................................................................................................................................................................................22
CERV Assessment Interval ..................................................................................................................................................................24
Display Settings...................................................................................................................................................................................25
Status & Alerts....................................................................................................................................................................................26

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Controller Overview
The CERV’s integrated touchscreen interface and optional wireless touchscreen controller puts control of
your indoor air quality literally into your hands, providing a gateway to the most advanced air quality
management system available today. While the CERV uses complex algorithms and computations to
optimize your indoor air quality, the touchscreen interface was built to be simple, easy to read, and intuitive.
From the controller, you can easily view real time air quality and comfort conditions in your home and
configure the CERV’s settings or auxiliary devices. This guide serves as a reference to allow you to
maximize your understanding of how to configure the CERV to serve you best. Refer to the CERV Operation
Manual for more information on the CERV’s system components, modes of operation, and recommended
settings.
Air quality, temperature, and relative humidity are measured directly at the CERV, and then displayed on the
integrated touchscreen, or relayed wirelessly to the touchscreen controller, allowing flexibility to locate the
controller wherever convenient. The wireless controller can be placed on a flat surface or mounted to a wall
using the bracket attached to the back of the controller enclosure. A wall outlet is all that is needed to plug in
the power supply. CERV setpoints and configurations are stored locally on the CERV’s control board
memory, so powering the touchscreen is not necessary for the CERV to operate. Checking CERV status or
making any changes will require use of either the touchscreen controller or the CERV-ICE internet gateway,
which allows online control and monitoring as well as other features. More information on CERV-ICE can be
found at http://buildequinox.com/products/cerv/cerv-ice/.
Connecting The Wireless Controller
To pair the wireless touchscreen controller with the CERV, make sure that both the touchscreen and CERV
are powered. While the wireless network used is often robust enough to allow access throughout the entire
home, in some cases the touchscreen may be out of range and need to be moved closer to the CERV. To
simplify the process, perform the pairing with the wireless touchscreen and CERV in the same room. Follow
the diagrams on the next two pages.
Wireless Touchscreen controller
Power supply

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After reaching the Link to CERV screen, the base CERV must be put into pairing mode so the two can be
linked together. Follow the instructions on the next screen to navigate to the correct screen on the base
CERV. The touchscreen may be paired by either pressing the green Send Pairing Request button, or
manually entering the wireless touchscreen’s wireless touchscreen ID.
If multiple wireless touchscreens are being used with one CERV, a previously paired touchscreen may be
used to enter pairing mode instead of the base CERV.

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Once the wireless touchscreen is paired, it will start receiving data from the CERV and configuration screens
will be active. On the home screen of the wireless touchscreen controller, the “connected” icon will change
from to

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Home Screen
Overview:
The Home Screen displays the current temperature, relative humidity, CO2, VOC, and status of the CERV.
It additionally provides quick access to other screens, such as heating and cooling setpoints, timed
ventilation, status and alerts, and the Main Menu.
The background color of the screen, along with some of the icons will change depending on the CERV’s
current operating mode. The possible modes are:
•Assess –The CERV is recirculating air throughout the house in order to obtain current readings of
the home’s overall health and comfort. If the CERV is within all setpoints and does not need to
ventilate, heat, or cool, it will revert to its standby “off”mode. Assessment is 2 minutes in duration and
time between assessments depends on the Assessment Interval (see pg 15).
•Vent (Heat/Cool/Setpt) –The CERV will ventilate the home for various reasons. The CO2/VOC
levels may have gone above setpoint, a wireless ventilation switch was triggered, a timed ventilation
event may have been started, or the CERV may be using outside air to heat or cool the home. If the
home is within the heating and cooling setpoints, but the CERV is ventilating, the screen will be green
and the current Mode will show Vent Setpt. A red or blue screen will appear if the CERV is heating or
cooling while in ventilation mode.
•Recirc (Heat/Cool) –If ventilation is not needed, but the inside temperature is outside the bounds of
your heating or cooling setpoint, the CERV will go into a recirculation heating or cooling mode. The
screen will be red or blue depending on heating or cooling mode.
•Off –The CERV has determined that your air quality is acceptable and your inside temperature is
satisfactory. It will conserve energy by turning itself off. The screen will be gray while in this standby
mode. The CERV fans will come on periodically for the assessment period.
Other Notes:
The colored bars below the CO2/VOC readings indicate how the current air quality levels compare to the
setpoint. Green indicates that your air quality is acceptable, yellow indicates that the pollutant level is
nearing the ventilation setpoint, and orange indicates that the pollutant level is above the setpoint and the
CERV is ventilating or will start doing so shortly.

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Heating and Cooling Setpoints
Overview:
On this screen, you may configure your heating and cooling setpoints for the CERV. There are two paths to
get to the heating and cooling setpoint screen. From the Home Screen simply press the thermometer icon or
go through the Main Menu. On the temperature setpoints screen you may change either setpoint and then
press the checkmark to accept the change. To reject the changes or make no change, press the .
After pressing either the checkmark or the X you will be taken to the previous screen.
Note: The lower bound of the cooling setpoint is two degrees F above the current heating setpoint. Likewise,
the highest the heating setpoint can be set is 2 degrees below the current cooling setpoint. It may be
necessary to move one setting first in order to move the other.
On many screens you will notice a “?” button. Pressing this button will take you to a Help Screen for the
screen you are currently on. The Help Screen provides detailed information on the current screen
including what settings can be changed and how these settings relate to the CERV’s operation. Below is
the help screen for the Temperature Setpoint screen. This demonstrates how the CERV operates in
heating or cooling mode in relation to the setpoints. Data shown on the help screen is only
representative.

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CO2/VOC and Ventilation Setpoints
Overview:
On this screen, you may configure your ventilation setpoints for the CERV. Like the Temperature Setpoint
screen, there are two paths that take you to the Ventilation Setpoints. On the left side of the screen are the
CO2 and VOC sensor settings. The CERV is a demand controlled ventilation (DCV) system and has
independent CO2 and VOC sensors. These sensors are controlled with a single setpoint. If the CO2 or VOC
sensors read above the PPM (parts per million) setpoint, the CERV will go into fresh air ventilation mode to
bring the air quality back to an acceptable level. Clicking on the CO2 or VOC buttons at the top will disable
or re-enable either sensor. An orange background on the button indicates the sensor is enabled, while gray
indicates the sensor is disabled.
The right side of the screen lets you set scheduled ventilation where the CERV will ventilate for the chosen
% out of an hour regardless of the CO2 and VOC sensor readings. For example, 10% would ventilate 6
minutes out of every hour. This can be used in addition to the demand controlled ventilation (DCV) or in
place of DCV if the pollutant sensors are turned off.
Recommendations:
Recommend Ventilation Setpoint is 900 to 1100PPM. Studies have shown that levels above 1000PPM can
indicate that a home may have detectable odors as well as negative effects on productivity, alertness, and
general comfort. In some rare cases, outside air may actually be more polluted than the air inside your
home. In this case bringing in outside air will increase the pollution level inside, rather than decrease it. This
could be due to neighbors burning leaves, wood burning stoves, etc. In this type of situation, you may
choose to disable the CERV’s affected CO2 or VOC sensor until the situation is resolved.

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Recirculation
Overview:
Scheduled Recirculation can be used to move air throughout the home during times when the CERV would
otherwise be off because no heating, cooling, or ventilation is needed. This Scheduled Recirculation setting
is reached through the Comfort Menu. By setting the Scheduled Recirculation setpoint, the CERV will spend
the set % of the Assessment Interval time in Recirculation Mode. For example, if the Assessment Interval is
set to 10 minutes and the Scheduled Recirculation set to 10%, the CERV will recirculate for 1 minute out of
the 10 minute interval. During recirculation, only the inside supply fan is powered. See pg 17 for information
on the Assessment Interval.
Recommendations:
The time available for scheduled recirculation will depend on time needed for ventilation, heating, or cooling
because this recirculation is only possible at times when all setpoints are satisfied. Setting to 100% will
ensure constant movement of air throughout the home. Initially leaving it at 0% will allow user to evaluate
CERV’s time spent in off mode and if an increase in Recirculation % is desired to move air during down
time.