Airius Delta-T EC Owner's manual

AIRFLOW REINVENTED
DELTA T EC FAN CONTROL
INSTALLATION,
OPERATION &
MAINTENANCE

CONTENTS
»Introducon
»Safety Precauons
»Pre-Installaon
»Installaon
»Operaon
»Maintenance
»Troubleshoong
»Warranty
Airius, LLC (Manufacturer)
811 South Sherman St.
Longmont, Colorado 80501 - USA
Toll free: 1-888-247-7327
Telephone: [phone]
Fax: [phone]
Email: inf[email protected]
Web: www.airiusfans.com
May be covered by one or more of the following
United States Patents:7,381,129 B2; D514688
and other patents pending
AIRIUS®, AIR PEAR®, AIRIUS PUREAIR®,
PEARLINK®, and THE THERMAL EQUALIZER®
are trademarks of Airius, LLC, registered in
the U.S. and in some countries abroad. Other
trademarks pending in the U.S. and abroad.
NOTE: Carefully check fans/controls for shipping
damage. Report any damage to the carrier
immediately. Do not aempt to operate if visible
damage is evident to either the circuit or to the
electronic components. All informaon contained
in this manual is intended to be correct, however
informaon and data in this manual are subject to
change without noce. Airius makes no warranty
of any kind with regard to this informaon or
data. Further, Airius is not responsible for any
omissions or errors or consequenal damage
caused by the user of the product. Airius reserves
the right to make manufacturing changes that
may not be included in this manual.
Delta T EC Control Installaon Guide: V1.1
©2023 Airius, LLC.
Introducon
Congratulaons on the purchase of an Airius fan
system. Our patented, American-made, air-mixing
system will ensure beer thermal comfort in
both the summer and winter while driving down
expensive energy bills. We are here to support
you and if you have any quesons or comments,
we can be contacted through our website,
airiusfans.com, or give us a call: 1-888-247-7327.
About the Airius Delta-T EC Control
Airius Delta-T EC controls allow for 5 modes
of operaon: 24 hr mer, automac Delta
T Control, thermostat control, humidistat
control and manual mode. Automacally take
control of stracaon in your space using the
supplied ceiling/oor temperature sensors. The
control output is 0-10VDC making this control
compable with all Airius EC motor opons. For
Airius shaded pole or slit-capacitor fans, please
refer to the Airius Delta-T AC controller.
Operang Temperature: 15 to 150˚F
Humidity Range: 10 to 99% RH (non-condensing)
Power Input: 24VDC
Power Output: 0-10VDC
Communicaon Wiring: 4 conductor 22-24AWG
Interface Display Type: LCD
Units: Fahrenheit or Celsius
High Sensor: Air Temperature and humidity
Low Sensor: Air Temperature and humidity
Limitaons: Max distance of 82 between
interface and sensors.
Only for use indoors.
What’s In the Box
Each Delta T EC Control package includes:
• 24VDC Power Supply
• Control interface
• (2) temperature sensors
What You Will Need
• Phillips screwdriver
• 2x4 job box for wall mounted control
• 2x4 job box for each temperature sensor
• Conduit for wire runs
• Twisted pair cable (4 conductors)
• 2 Conductor signal/control cable

Safety Precauons - Read &
Save
WARNING – TO REDUCE THE RISK OF FIRE,
ELECTRIC SHOCK, OR INJURY TO PERSONS:
Installaon work and electrical wiring must be
done by qualied person(s) in accordance with all
applicable codes and standards.
CAUTION: The installaon of the Airius
Delta-T Control must be in accordance with the
requirements specied in this installaon manual
and with any addional requirements set forth
by the naonal electric code (NEC), ANSI/NFPA
70-1999, and all local codes.
If you are unfamiliar with wiring, use a qualied
electrician.
WARNING: To prevent electrical shock and/or
injury disconnect controller from power source
before you move or service the controller.
WARNING: To reduce the risk of re, electric
shock, and injury to persons, this controller
should only be installed with Airius Fans that use
a shaded pole or PSC motor. Not suitable for use
with other motors.
CAUTION: When service or replacement of a
component in the controller requires the removal
or disconnecon of a safety device, the safety
device is to be reinstalled or remounted as
previously installed.
WARNING: Risk of re, electric shock, or injury
to persons during maintenance. Disconnect
the controller from the power supply before
servicing.
WARNING – TO REDUCE THE RISK OF FIRE,
ELECTRIC SHOCK, OR INJURY TO PERSONS,
OBSERVE THE FOLLOWING:
a) Use this unit only in the manner intended by
the manufacturer. If you have quesons, contact
the manufacturer.
b) Before servicing or cleaning unit, switch
power o at service panel and lock the service
disconnect to prevent power from being switched
on accidentally. When the service disconnect
cannot be locked, securely fasten a prominent
warning device, such as a tag, to the service
panel.

Pre-Installaon
Electrical
ELECTRICAL WORK MUST BE PERFORMED
BY A QUALIFIED PERSON(S) IN ACCORDANCE
WITH ALL NATIONAL AND LOCAL CODES/
STANDARDS.
Airius recommends installing a dedicated circuit
for powering Airius fans.
Mechanical
A ladder, scissor li or other suitable means of
reaching the ceiling sensor and fan installaon
points will be required.
Installaon
Component Mounng
The wall control and oor sensor should both
be located approximately 48” AFF and each
mounted within a standard 2x4 job box.
The ceiling sensor should be wall mounted within
a 2x4 job box at the same elevaon as the fans.
Overall System Wiring Diagram
Component Mounng Note
The sensors need to be located in an area where
they will not be inuenced by local factors. DO
NOT MOUNT in an area that sees direct sun
light, next to high heat/cold sources, near HVAC
discharge vents, near radiant heang panels, etc...
Ideally, the sensors will be centrally located in the
space to best represent the average temperature
and humidity.
If you have quesons please contact the factory.
DELTA-T
SENSOR
1
DELTA-T
WALL
CONTROL
POWER
SUPPLY
24VDC
0-10VDC
+24VDC
GND
SDA2
SCL2
+24VDC
GND
SDA1
SCL1
LOW VOLTAGE LINE
HIGH VOLTAGE LINE
BLUE = GROUND/COMMON
YELLOW = SIGNAL INPUT
CONTROL DATA LINE
DELTA-T
SENSOR
2
AIRIUS
DESTRAT
FAN
AIRIUS
DESTRAT
FAN
CEILING LEVEL
FLOOR LEVEL
FAN CONNECTIONS
+24VDC
GND
GND
AC POWER
JUNCTION
BOX
AC POWER
115VAC POWER
AC POWER
JUNCTION
BOX

Sensor Wiring
Wire the wall control and sensors using twisted
pair cables. The sensor to controller distance
should not exceed 82 feet (25m) of wire length.
Control Wire Length (To fans)
The total length of the control wire from the wall
mounted controller to the fans should not exceed
750 . Mulple fans can be controlled as the wire
length is the liming factor vs number of fans.
Only suitable for use with EC motors.
Fan Wiring
REMOVE THE WAGO CONNECTORS THAT
ARE INSTALLED ON THE YELLOW AND RED
LEADS COMING FROM THE FAN(S).
Wire the wall control and fan(s) using a 2
conductor twisted control/signal cable. Daisy
chain the fans as indicated on the wiring diagram
on the previous page. Terminate the connecons
at the wall control terminal block labeled
0-10VDC (yellow) and GND (blue).
Control Power Wiring
A 24VDC power supply is provided. Connect the
power supply to the wall control terminal block
labeled GND and 24V. The black wire with the
dashed white lines should be connected to the
24V connecon and the black cable with text
should be connected to the GND connecon.
ONLY PLUG THE POWER SUPPLY INTO A 120V
OUTLET ONCE ALL WIRE CONNECTIONS ARE
IN PLACE.

Operaon
The controller operates in 5 dierent modes: 24
hr automac mer, Delta T control, thermostat
control or humidistat control, and manual mode.
Below are instrucons on modifying the sengs
and operang the various modes.
Reading the LCD Interface
Keypad Operaon
Set Units in Degrees F ° or C °
The controller defaults to Fahrenheit. If you wish
to change the units, PRESS & HOLD the ON/OFF
buon for 3 seconds
NOTE: AUTO Mode
The default AUTO mode is Delta T control. The
other modes will run when the set of condions
are met under their sengs. If you wish for a
parcular funcon to not run, set the parameters
outside of possible condions in the space or in
the case of the mer, do not set any on/o mes.
Set System Time
HOLD SET for 3 seconds. Press AUTO to select
hours or minutes. Use the UP and DOWN arrows
to increase/decrease the me seng. Press SET
to exit me sengs.
AUTO
Press to switch modes
Press to switch Auto/Manual mode
Holding down to switch between
temp./humidity control
UP
Press to increase,
Hold 3 seconds to rapidly increase
ON/OFF
Holding down switches
between degrees F or C
DOWN
Press to decrease
Hold 3 seconds to rapidly decrease
SPEED SETTING
0 is OFF, 8 is MAX
24 HR TIME
AUTOMATIC MODE
Blank when in Manual mode FLOOR SENSOR
TEMPERATURE or HUMIDITY

Set 24 HR Timer Mode
The mer mode will run the fans at a xed speed
between two set mes (ex: business hours 8:00-
16:00). There is a ‘me on’ seng, a ‘me o’
seng, and ‘speed step’ seng.
Press SET. Press AUTO to select: mer on hour,
mer on minutes, mer OFF hour, mer OFF
minutes, and speed seng. Under each selecon
use the UP/DOWN arrows to increase or
decrease the selected value. Press SET four mes
to exit.
Set Delta T Mode
The delta-T control mode connuously measures
the dierence in temperature between the high
and low temperature sensors and automacally
adjusts fan speed. As the delta-T increases, the
fan speed increases. Here is a list of the default
delta T values and associated speed seng:
0 degrees F = Speed 4
2 degrees F = Speed 4
4 degrees F = Speed 5
6 degrees F = Speed 6
8 degrees F = Speed 7
10 degrees F = Speed 8
12 degrees F = Speed 8
14 degrees F = Speed 8
16 degrees F = Speed 8
Press SET twice. Press AUTO to select the
delta-T value then press UP/DOWN to set
the speed step for the given delta T. Some
adjustments might be needed depending on
sound constraints, building height, severity of
stracaon, etc...
Set Thermostat Mode
The thermostat control mode monitors the oor
sensor temperature and will energize the fans to
the speed seng once the temperature is met.
The default value is 120 degrees F with a speed
seng of 0. Use this mode when using the fans
for cooling. As an example, set the temperature
to 75 degree F and the speed to seng 8 (MAX).
Once the temperature in the space reaches and
exceeds 75 degrees F, the fan will run at full
speed.
Press SET 3 mes. Press AUTO to select the
thermostat threshold or the speed seng. Use
the UP/DOWN arrows to adjust the selected
value.
Set Humidity Control Mode
The humidity control mode monitors the oor
sensor humidity and will energize the fans to
the speed seng once the relave humidity
percentage is met. The default value is 65% with
a speed seng of 5. This mode would commonly
be used in grocery applicaons to prevent
fogging on case doors.
Press SET 4 mes. Press AUTO to select the
relave humidity threshold or the speed seng.
Use the UP/DOWN arrows to adjust the selected
value.
The thermostat and humidistat control modes
can not be operated at the same me. To select
one or the other, hold down the AUTO buon
for 3 seconds. If humidistat control mode is
selected, the screen will show the percent
relave humidity of the oor sensor. If the
thermostat control mode is selected, the screen
will show the oor sensor temperature value.
Manual Control
Pressing the UP/DOWN arrows will allow you to
manually adjust the speed seng. The controller
will stay in manual mode unl it is switched back
to AUTO. To go back to AUTO mode, press AUTO
once.

Maintenance
Follow these easy steps to prevent any excess
dirt buildup and preserve the life of the product:
Cleaning:
Power o the control
You may clean the controller and
sensor faceplate with a damp cloth,
using mild household detergent only.
DO NOT use petroleum products,
thinners, solvents, ammonia, alcohols
or other chemicals to clean any part of
the Delta-T Controller.
Troubleshoong
The Airius products are tested before they
leave the factory, resulng in an extremely
low rate of returns. However, mechanical and
electrical devices do fail, and we recommend
that you idenfy the problem and try the simple
suggesons below.
The screen shows ‘E1’ or ‘E2’:
a) Check sensor/control wiring.
d) Contact manufacturer for addional
help: 1-888-247-7327 or
[email protected]
Fan airow is too fast/slow:
a) Adjust speed control sengs to
produce desired ow.
Control will not power on:
a) Check that the power supply is
providing 24VDC power to the control.
b) Contact manufacturer for addional
help: 1-888-247-7327 or
[email protected]

Airius Warranty Policy
This warranty is limited to products purchased directly from Airius, LLC (“Airius”) or one of its
authorized resellers. To determine whether a reseller is authorized, please contact Airius at the contact
informaon below. Airius warrants products listed below will operate properly and be free of defects in
materials and workmanship according to the following terms:
Products Warranty Period
Speed Controllers 1 Year (All Parts/Components)
These include new units or units rebuilt under Airius’ factory refurbish program. Airius will repair or
replace such units, at Airius’ sole discreon, if there is any defect in their materials or workmanship
caused by Airius during the warranty period. With respect to replacement or repair rendered, Airius
warrants that the parts replaced or repaired will operate properly and be free from defects in materials
and workmanship for the remainder of the original warranty period.
Denions:
1. The “warranty period” shall begin on the shipping date from the Airius factory to the
customer (end user) .
2. “Operate properly” applies to mechanical, electrical and structural funcons only. No
guarantee is made regarding the quanty of air movement or the appropriateness
or the eecveness or merchantability of any product for its intended purpose or
for the customer’s parcular applicaon.
Exclusions:
Any of the following acons will constute a breach of and will void all warranes:
1. Improper delivery, installaon, or maintenance, including, but not limited to:
a. Failure to follow the required installaon procedures specied in the Airius “Installaon
Guide” and in all other documentaon supplied with the fans and related equipment,
including documentaon provided by the manufacturers of the individual fan and
control components;
b. Failure to follow all applicable codes and ordinances, including, but not limited to the
Naonal Electric Code and state and local building codes;
c. Failure to follow electrical engineering industry standards regarding the approved method of
installing electrical equipment having the characteriscs of the fans, the fan controls, and
their related components, even if such standards are not explicitly referenced in
any literature supplied by Airius or provided by the manufacturers of the
fan and control components.
2. Any modicaon or alteraon of, or adjustment to the fans, fan controls, and/or any
disassembly of the components of the fans and fan controls for any purpose whatsoever,
including any aempt to diagnose and/or repair any problem, without prior wrien
authorizaon from Airius. Such disassembly includes, but is not limited to, separaon of the
motor from the housing assembly and/or removal of any electrical component from the fan
controller unit.
3. Installaon of fans into a detrimental environment with airborne oils / cung uids /
solvents that may aack the base resin or motor, unless:
a. Airius has provided wrien authorizaon prior to installaon.
4. Misuse, abuse, accidents, unreasonable use or Acts of God.
5. Incorrect electric current, voltage or supply.
6. Failure to use fan controls supplied by Airius, unless:
a. Airius has provided wrien authorizaon prior to installaon; and
b. The fan controls are built, operated and maintained according to specicaons provided to
and approved by Airius.
7. Failure to perform periodic maintenance as detailed in the Airius “Installaon Guide.”

8. Consequenal or incidental damages sustained by any person or enty as a result of any
breach of these warranes are also excluded, except where such damages may not
be excluded by law.
Acquiring Warranty Service
Do not return any item without rst being assigned a Return Material Authorizaon (RMA) tag number.
Customer must obtain a RMA# from Airius (888-AIR-PEAR or inf[email protected]) before returning
the faulty unit. RMA number must appear on the return-shipping label and be associated with any
correspondence. Customer is responsible for all return shipping costs to:
Airius Warranty - RMA# ____
711 South Lincoln Street
Longmont, Colorado 80501
Airius will return the unit(s) freight prepaid. Airius may elect to repair the same unit at customer site or
oer replacement parts to facilitate repair and reduce customer down me and expense. Airius is not
responsible for misuse of their product.
Freight claims are the responsibility of the customer and all products are shipped FOB Longmont,
Colorado, USA.
Remedy and Limit of Liability
The exclusive remedy of the purchaser, and the limit of liability for Airius, for any and all losses in
connecon with this product shall be repair or replacement of the warranted product or the aected
components, as provided above.
Airius reserves the right to make the nal determinaon, based on its own assessment, as to (1) wheth-
er the problem in queson is the result of a defect in design, workmanship or materials, and not the
result of error, misuse or abuse on the part of the customer, as set forth under the exclusions detailed
above; (2) whether the problem or defect is material and requires acon under this warranty; and (3)
whether the remedy of repair or replacement is appropriate.
With regard to electrical and electronic components provided by Airius that comprise part of the prod-
ucts, including motors, Airius relies on the determinaon by the original manufacturer as to whether
the failure of such component was the result of a defect. If the manufacturer of such component
determines that there was no defect and therefore refuses to cover it under warranty, Airius likewise
will not warranty such item.
THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING ANY WARRANTY, REPRESENTATION OR CONDITION OF MERCHANTABILITY OR
THAT THE PRODUCTS ARE FIT FOR ANY PARTICULAR PURPOSE OR USE, AND SPECIFICALLY
IN LIEU OF ALL SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. REPAIR OR
REPLACEMENT SHALL BE THE SOLE REMEDY OF THE CUSTOMER AND THERE SHALL BE NO
LIABILITY ON THE PART OF AIRIUS FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSE-
QUENTIAL DAMAGES, INCLUDING BUT NOT LIMITED, TO ANY LOSS OF BUSINESS OR PROFITS,
WHETHER OR NOT FORESEEABLE.
Any and all disputes related to this warranty or any other maer related to Airius must be submied
to binding arbitraon within 45 radial miles of Longmont, Colorado. The arbitrator will follow the Col-
orado Uniform Arbitraon Act and the Rules of the American Arbitraon Associaon. Under Colorado
law, punive damages are not recoverable by any party subject to arbitraon. Moreover, jury trials are
not available in arbitraon. The arbitraon decision or award is legally binding and enforceable. To the
extent that a court rules that this paragraph is not enforceable, the pares agree to resolve any and all
disputes in the Boulder District Court in Boulder, Colorado.
Customer Service: 888-AIR-PEAR (888-247-7327) or inf[email protected]