AirCycler g2 Operation manual

AirCycler® g2/g2-k
Installation & User’s Guide
VENTILATION MADE BREEZY!™
a breeze to install • a breeze to use
Ventilation Products

2AC DOC 8.5
REV 11/21/2014
INTRODUCTION
If the AirCycler® g2 was installed in your home as a ventilation controller, DO NOT DISABLE IT.
In the past, homes depended on natural leaks for ventilation. Today, energy ecient homes are built to reduce natural
ventilation and leaks. Inadequate ventilation can increase indoor air pollutants to harmful levels. Indoor air quality is
typically 5 to 10 times more polluted than outside air. Controlled ventilation provides adequate air ow to the home
without compromising its eciency.
SAFETY CONSIDERATIONS
Read and follow manufacturer’s instructions carefully. Follow all local electrical codes during installation. All wiring
must conform to local and national electrical codes. Improper wiring or installation may result in personal injury or
product and property damage.
INSTALLATION CONSIDERATIONS
The AirCycler® g2 requires 24VAC (R and C terminals) to be connected for proper operation. The controller will not
operate without these two connections.
The wires (R, C, & W ) from the air handler to the thermostat can run parallel with the wiring from the AirCycler®
g2 to the air handler. The fan wire (G) must be interrupted by the AirCycler® g2. Some thermostats do not require a
common (C) connection. The AirCycler® g2 requires this for power, which must be wired to the furnace.
KEY
Vnc - Normal Closed Vent
R - 24VAC Power
W - Heating
Gt - Fan From Thermostat
Gf - Fan to Furnace
C - Common
V - Vent
Ex - Exhaust Fan
Wiring Diagram

3AC DOC 8.5
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SELECTING YOUR COMPONENT EQUIPMENT
AIR HANDLER
The 2012 IECC requires the central blower used with the AirCycler g2 to use an electronically commutated motor.
EXHAUST FAN
The AirCycler® g2, when used with the optional FanConnect™ switch, can be congured to rely on the exhaust fan
for supplemental ventilation. If used in this conguration, the exhaust fan must be capable of a ow rate equal to or
greater than the continuous whole building mechanical ventilation rate.
The bathroom exhaust fan should have a sound rating of 1.0 sone or less. This recommendation is a requirement if the
home is certied as an ENERGY STAR V3 home, if the home is located in California (per California Title 24, Part 6), or if
the home is otherwise required to comply with ASHRAE 62.2.
The 2012 IECC code requires the exhaust fan have an ecacy of 1.4 cfm/W if less than 90 cfm or 2.8 cfm/W if equal to
or greater than 90 cfm.
Note:
The AirCycler® g2 will only control one exhaust fan. We recommend using our SmartExhaust® bath fan/light switch/
ventilation controller for additional bathrooms requiring ventilation.

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DAMPER LOCATION
The fresh air damper can be located anywhere in the inlet duct. Minimize the length of the inlet duct to improve air
ow and improve system eciency. It is recommended that the damper be as close to the return air plenum and the
AirCycler® g2 controller as possible, and the inlet duct connect to the return plenum upstream of the system lter, and
down- stream of any duct mounted sensors.
DAMPER INSTALLATION
The damper may be installed in any position. It is recommended to install it with the motor at the12 o’clock position if
mounted horizontally. Air may ow through in either direction, although it is recommended to install with the crimped
end as the outlet. Use care to avoid distorting the damper housing and provide adequate support.
CHOOSE A FRESH AIR LOCATION
ASHRAE recommends that the fresh air intake be located at least 10 ft. from any source of pollutants, such as auto
exhaust, dryer exhaust, exhaust from any fuel-burning appliances, etc. Avoid installation near odor sources such as
garbage bins or barbecue grills. A minimum of 3 ft. above ground is recommended to avoiding ingress of leaf litter,
grass clippings, etc. Do not use a crawl space, basement, or attic as a source of intake air. Always be sure to comply with
local building codes and requirements regarding fresh air inlets.
Filter
AirCycler®
G2
Thermostat
Main Return
Duct
Motorized
Damper
Outside
Air Duct

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INSTALLATION INSTRUCTIONS
1.1 CONTROLLER LOCATION
The AirCycler® g2 controller can be installed near the thermostat or out of view on/near the air handler unit.
Warning: Before installing the AirCycler®, turn o all power to the furnace. There may be more than one power to disconnect.
Electrical shock can cause injury or death.
1.2 INSTALLING THE AirCycler®
On power up, all icons will be illuminated for 3 seconds.
There are two set up methods: Calculated Time and Calculated
Flow. Calculated Flow is used primarily with the optional
FanConnect™ bath fan/light switch.
OPERATING MODE DISPLAY
Normal display will show the percentage of the current ventilation cycle (hour) that is complete.
If the central fan is on, the FAN and ON icons will show.
If the exhaust (bath) fan is on, the EXH icon will show.
If the outside fresh air damper is open the OA icon will
show.
If the EXH fan is running its set delay time after the
FanConnect™ has been turned o, the delay time
countdown as well as the MIN and EXH icons will show.
The ON icon is only shown when the AirCycler®g2 has
forced the central fan on.
Pressing the MODE button at any time during normal
operation will go to setting the current time of day.
THE EXHAUST
FAN IS ON
THE THERMOSTAT
HAS TURNED ON
THE CENTRAL FAN
THE AIRCYCLER® G2
HAS FORCED THE FAN
THE DAMPER
IS OPEN
PERCENTAGE OF
VENTILATION COMPLETE
1.0 G2 OPERATION & DISPLAY UP ARROW
Use as directed during set up.
During Normal Operation, use to view
current status
MODE BUTTOM
Use as directed during set up.
During Normal Operation, use to cycle
through current time of day
DOWN ARROW
Use as directed during set up.
During Normal Operation, use to view
current settings

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2.1.2 SETTING MEASURED EXHAUST AIR FLOW
Enter the measured ow from the exhaust fan. Factory default is 60 CFM.
Press MODE to advance to the next setting.
2.1.3 SETTING CODE REQUIRED CONSTANT AIR FLOW
Set the required continuous air ow in CFM based on relevant codes. For ASHRAE 62.2
see Appendix A. Factory default is 30 CFM. The AirCycler® g2 will calculate run times
based on settings 2.1.1 and 2.1.2.
Press MODE to advance to the next setting
2.1.4 EXHAUST FAN DELAY TIME
Set the desired length of time you want the exhaust fan to run after the FanConnect™
switch has been turned o. Factory default is 10 minutes.
Press MODE to save all settings and return to normal operation.
2.1.5 CALCULATED FLOW SETUP IS COMPLETE
Set up is complete. The AirCycler® g2 will now return to normal operation.
2.1 CALCULATED FLOW SET UP
2.1.1 SETTING MEASURED SUPPLY AIR FLOW
The measured ow is the amount of air that enters the
return side of the air handler from the outside air vent.
Enter the measured ow. To accommodate variable speed
air handlers, you can enter dierent values for heat, cool
and fan. Factory default is 90 CFM.
Press MODE to advance to the next setting.
Flow measured
during heat call
Flow measured during
cooling call
Flow measured during
fan only call
*Only if FanConnect™ switch is not
connected
Alternating
Display
Press: MODE
Alternating
Display
Press: MODE
Alternating
Display
Press: MODE

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2.2 CALCULATED TIME SETUP
2.2.1 SETTING NUMBER OF MINUTES PER HOUR OF SUPPLIED AIR FLOW REQUIRED
Enter the minutes per hour that you require fresh air to be brought into the home. Factory
default is 20 minutes.
Press MODE to advance to the next setting
For installations without the FanConnect™ switch, go to section 2.2.3.
2.2.2. SETTING MINUTES OF EXHAUST FAN RUN TIME REQUIRED
Enter the desired minutes/hour you want the exhaust fan to run. Factory default is 20
minutes per hour.
If the FanConnect switch is not detected, make sure it is in the OFF position.
See Appendix B for troubleshooting.
2.2.3 SETTING OPERATION HOURS
If the user does not want the ventilation system to run constantly, you can set ON time
and OFF time. Factory default is ON.
If you are not setting an ON and OFF time, continue to section 2.2.5. If you enter YES, the AirCycler® g2 will prompt you
to enter the hour you would like the ventilation to begin and the hour you want it to end followed by the current time.
Set the hour you want the ventilation to START. Press MODE to advance to the next setting.
Set the hour you want the ventilation to STOP.
Press MODE to advance to the next setting.
2.2.4 SETTING CURRENT TIME
Enter the current time. Press MODE to advance to the next setting.
If you are not connecting a FanConnect™ switch, continue to section 2.2.6.
2.2.5 EXHAUST FAN DELAY TIME
Set the desired length of time you would like the bath fan to run after the FanConnect™
has been turned o. Factory default is 10 minutes.
Press the DOWN arrow until the countdown reaches 0 then SL (SL= slave mode) In slave
mode the exhaust fan runs anytime the central fan is running with the fresh air damper
open. Slave mode will provide a “balanced” mode of operation.
2.2.6 CALCULATED TIME SETUP IS COMPLETE
Setup is complete. The AirCycler® g2 will now return to normal operation.
See Section 3 for normal operation.
N

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3.0 NORMAL OPERATION DISPLAY
DISPLAY STATUS & SETTINGS
3.1 STATUS
To get detailed status information, press the UP arrow. The status screens are the same for both Calculated Flow and
Calculated Time modes.
3.1.1 MINUTES LEFT
The rst screen is the number of minutes left in the period (hour). Pressing the UP arrow
again gets you to the next status screen
3.1.2 OUTSIDE AIR TIME ELAPSED
This display shows the number of minutes this period that the outside air damper has
been open with the central fan running.
3.1.3 EXHAUST RUN TIME*
This shows the elapsed run time of the exhaust fan for this time period.
3.1.4 EXHAUST DELAY TIME*
This shows the exhaust delay time set.
3.2 SETTINGS
3.2.1 CURRENT SETTINGS
By pressing the DOWN arrow during normal operation, the user can scroll through the current setting entered by the
installer.
For Calculated Flow mode the screens will show:
• Required CFM set
• Set measured outside air CFM
• Set measured exhaust air CFM
• Set exhaust fan delay time
For Calculated Time mode the screens will show:
• Exhaust run time set*
• Outside air time in minutes
• Exhaust fan delay time*
• If operating time is enabled:
• Operating Time On
• Operating Time O

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3.3 SET TIME
3.3.1 SET CURRENT TIME
By pressing the MODE key you will cycle through current time of day and will be able to change it if needed.
APPENDIX A
ASHRAE 62.2 REFERENCE CHART
CFM Required:
7.5 CFM * (N+1) + A * 0.01
N = No. of Bedrooms A = Square Footage
Square Footage
No. of Bedrooms

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APPENDIX B
TROUBLESHOOTING
Problem: Blank Display on the AirCycler®
Conrm:
1. The furnace has power
2. The thermostat is operational
3. The furnace will call for heat from the thermostat
4. The fan operates with a fan only signal from the thermostat
5. The furnace is providing 24 VAC to the AirCycler® g2
6. Verify wiring conforms to wiring diagram
7. Make sure cover is rmly seated on the base
Problem: AirCycler® g2 turns furnace fan on and o, but the motorized damper does not cycle.
Conrm:
1. The AirCycler® g2 is providing a 24 VAC signal to the motorized damper
2. The 24 VAC motorized damper is operational by powering directly with a 24 VAC signal
3. There is continuity in the wiring between the damper and the AirCycler® g2
Problem: A/C turns on during fan cycling calls
Conrm:
1. Wiring conforms to wiring diagram
2. The G wire is properly connected
3. The G wire needs to be interrupted by the AirCycler® g2
4. Do not run the G wire in parallel
Problem: The AirCycler® G2 does not detect the optional FanConnect™ switch
Conrm:
1. Verify the FanConnect™ has power and is in the OFF position.
Technical Support:
1.877.FAN.CONTrol