Field Controls FAVC User manual

www.fieldcontrols.com
Please retain these instructions after installation.
This device MUST be installed by a qualified agency in accordance with the manufacturer's installation instructions. The definition of
a qualified agency is: any individual, firm, corporation or company which either in person or through a representative is engaged
in, and is responsible for, the installation and operation of HVAC appliances, who is experienced in such work, familiar with all the
precautions required, and has complied with all the requirements of the authority having jurisdiction.
Installation Date:
Installed By: Phone:
Model: FAVC
ITEMS INCLUDED:
1 – Fresh Air Ventilation Controller
1 – Mounting Hole Template
1 – Instruction and Installation Manual
1 – Mounting Packet containing
two (2) Sheet Metal Screws
1 – ODT Sensor Packet containing
temperature sensor, sheet metal
screw and two (2) wire nuts
FRESH AIR VENTILATION CONTROL
P/N 780100700 07/18 Rev F
READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY
READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY
BEFORE PROCEEDING WITH THE INSTALLATION.
BEFORE PROCEEDING WITH THE INSTALLATION.
• Meets the requirements of the ASHRAE 62.2 standard for ventilation.
• Supplied with an outdoor temperature sensor which mounts in the fresh air duct.
• Has three selectable Climate Zones with unique ventilation inhibit parameters for the selected
climate.
• Monitors up to four exhaust appliances within your home to adjust ventilation needs based on
total appliance operation.
• Can provide Make-Up air in response to an exhausting appliance.
• Can utilize an exhaust fan to drive ventilation independent of the central HVAC fan to save energy.
• Continuously monitors indoor Relative Humidity:
- Lower excess indoor humidity during hot muggy days by reducing ventilation during
these periods to prevent discomfort and mold growth in the home.
- Reduce condensation and corrosion of the heat exchanger.
The Field Controls Fresh Air Ventilation Control TM (FAVC) is designed to provide fresh air ventilation
year-round, keeping energy conservation, indoor air quality and comfort in mind. The FAVC delivers
ventilation along with many additional features:

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P/N 780100700 07/18 Rev F

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TABLE OF CONTENTS
page
1. FAVC LAYOUT - OVERVIEW 5
2. GATHER INFORMATION/ RECORD/ SET CONTROL 6
2A Determine The Required CFM Continuous 6,7
Residential Ventilation
2B Determine Fresh Air Intake 8,9
3. INHIBIT SET-UP - Dip Switches 1 & 2 10
3A Climate Zone Inhibit Options 10
3B Normal Climate Zone 11
3C Cold Climate Zone 12
3D Hot Climate Zone 12
4. OPTIONAL APPLIANCE MONITORING 13,14
5. MAKE-UP AIR OPTIONS - Dip Switch 3 15
6. ENERGY SAVING OPTION - Dip Switch 4 15
7. INSTALLATION 16
7A. Installation Locations 16
i. FAVC location 16,17
ii. FAVC Mounting 18
iii. Intake Air Connection/Duct Installation 19
iv. Fresh Air Damper or HRV/ERV location 20
7B Wiring and Connections 21
i. Ventilation Control Connections 21
ii. Thermostat and Air Handler Connections 22-24
iii. Outdoor Temperature Sensor (ODT) Connection 25
iv. Outdoor Temperature Sensor LED Status 25
v. Appliance Monitoring Connections 26-28
8. MAINTENANCE AND TROUBLESHOOTING 29
9. SPARE PARTS AND OPTIONAL ACCESSORIES 30
10. SIZING OF FRESH AIR DAMPER AND HRV/ERV 31
10A How to size Fresh Air Damper 31-33
10B How to size an HRV/ERV 33
P/N 780100700 07/18 Rev F

Page 4 of 36
Thank you for purchasing the Fresh Air Ventilation ControlTM (FAVC) by Field Controls. This ventilation controller
is compatible with any HVAC system having accessible 24VAC R, C, W, Y, G terminals.
DANGER
• To prevent serious injury from electrical shock, this product must be installed by a qualified agency.
• 120 VAC can cause serious injury from electric shock. Some installations may require electrical
connections to line voltage sources.
• Before installing the FAVC, turn off all power to your HVAC system.
• When servicing FAVC system or components attached to FAVC system, turn off all power to these
items.
CAUTIONS
• Read entire manual and follow all instructions carefully.
• Follow all local electrical codes during installation.
• All wiring must conform to local and national electrical codes.
• Use caution when mounting components to surfaces that may have concealed wiring beneath the surface.
• Do not mount the FAVC controller on the supply plenum or supply ductwork.
• Do not mount the FAVC controller immediately downstream from any fresh air intake port, humidifier or
bypass outlet. False humidity conditions will cause the FAVC controller to operate incorrectly.
• Do not use the ventilation system for removal of flammable fumes or gases.
• Do not install ventilation controller in an outdoor location and/or wet location.
• Do not obstruct or cover the fresh air intake or air outlet of the ventilation system.
• Provisions should be made for make-up air requirements based on recommendations set forth by governing
agency to meet applicable building codes and ventilation standards.
WARNING
• Sharp metal edges (ductwork) can cause serious injury from cuts.
• Wear appropriate gloves when cutting, drilling and grinding plenum openings and handling ductwork.
• Wear appropriate eye protection when drilling, grinding and/or cutting ductwork.
P/N 780100700 07/18 Rev F
Input Voltage 20-30 VAC
Minimum VA Required 1.7 VA @ 24 VAC (full load current at nominal 24 VAC)
Supplied by the HVAC power source
Wiring Requirements 18-22 AWG, 24 VAC (Min)
Operating Temperature Range 10°F to 160°F
Operating Humidity Range 5 to 95% RH (non-condensing)
Outputs Maximum Load
Fan Output GF (Maximum Load Current): 3A inductive @24VAC (thermostat fan signal)
Vent (V, V) (Maximum Load Current): 3A inductive @24VAC (unsourced and isolated)
Exhaust (E, E) (Maximum Load Current): 3A inductive @24VAC (unsourced and isolated)
Inputs
Fan Input GT (Monitor Circuit Current): 5mA @24VAC (sourced from thermostat fan signal)
Heat Input W (Monitor Circuit Current): 5mA @24VAC (sourced from thermostat W signal)
Isolated Inputs (Monitoring)
Appliances #1 - 4
(A1, A2, A3, A4, A1C, A2C, A3C, A4C):
5mA @24VAC, TVS protected (requires common connection)
FAVC SPECIFICATION: Power Requirements (Class 2 Appliance)

Page 5 of 36 P/N 780100700 07/18 Rev F
1. FAVC LAYOUT - OVERVIEW
FIGURE 1: FAVC Functional Product Layout (shown with cover removed)

Page 6 of 36
P/N 780100700 07/18 Rev F
2. GATHER INFORMATION/RECORD/SET CONTROL
TABLE 1: Air Flow Dial Ranges and Factory Settings
FIGURE 2: VENTILATION ONLY DIAL SETTINGS
Continuous CFM
Rate Dial
Cool Ventilation
CFM Rate Dial
Heat Ventilation
CFM Rate Dial
2A. DETERMINE THE REQUIRED CFM CONTINUOUS RESTIDENTIAL VENTILATION
1. How many square feet of condition space will be ventilated with this appliance?
A. Make sure to include the following: basements, and/or bonus rooms within the
buildings thermal envelope.
B. Determine the number of bedrooms.
2. Select the appropriate ASHRAE 62.2 Residential Ventilation Standard that’s been adopted by your
state or by the local authority having jurisdiction.
3. Use the appropriate ventilation table 2A or 2B.
4. Select the building square footage equal or closes to your application.
5. Select the number of bedrooms associated with your application.
6. Locate where the square footage row and bedroom column intersect. This determines the CFM
continuous ventilation dial setting.
7. Record and save the continuous volume determined for your application.
CFM Settings
Minimum Maximum Factory
CONTINUOUS 25 200 100
COOL VENT 25 700 400
HEAT VENT 25 700 400
To Turn OFF or Deactivate Ventilation of the FAVC:
1. Before turning off, mark the current heat and cool vent settings with a permanent marker, or write
the value on the inner cover for reference in the event the manual has been lost.
2. Set both heat vent and cool vent to lowest possible setting by turning the dial all the way in a
counter clockwise rotation until it stops turning.
3. The FAVC will shut down within 20 seconds and remain inactive.
To Turn ON or Reactivate Ventilation of the FAVC:
1. Turn the dials of the heat vent and cool vent back to the desired value as marked or noted previously.
2. The FAVC will begin to ventilate on a cycle per the settings.

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2A Number of Bedrooms
Sq Ft 1 2 3 4 5 6
500 20 28 35 43 50 58
600 21 29 36 44 51 59
700 22 30 37 45 52 60
800 23 31 38 46 53 61
900 24 32 39 47 54 62
1000 25 33 40 48 55 63
1100 26 34 41 49 56 64
1200 27 35 42 50 57 65
1300 28 36 43 51 58 66
1400 29 37 44 52 59 67
1500 30 38 45 53 60 68
1600 31 39 46 54 61 69
1700 32 40 47 55 62 70
1800 33 41 48 56 63 71
1900 34 42 49 57 64 72
2000 35 43 50 58 65 73
2100 36 44 51 59 66 74
2200 37 45 52 60 67 75
2300 38 46 53 61 68 76
2400 39 47 54 62 69 77
2500 40 48 55 63 70 78
2600 41 49 56 64 71 79
2700 42 50 57 65 72 80
2800 43 51 58 66 73 81
2900 44 52 59 67 74 82
3000 45 53 60 68 75 83
3100 46 54 61 69 76 84
3200 47 55 62 70 77 85
3300 48 56 63 71 78 86
3400 49 57 64 72 79 87
3500 50 58 65 73 80 88
2B Number of Bedrooms
Sq Ft 1 2 3 4 5 6
500 30 38 45 53 60 68
600 33 41 48 56 63 71
700 36 44 51 59 66 74
800 39 47 54 62 69 77
900 42 50 57 65 72 80
1000 45 53 60 68 75 83
1100 48 56 63 71 78 86
1200 51 59 66 74 81 89
1300 54 62 69 77 84 92
1400 57 65 72 80 87 95
1500 60 68 75 83 90 98
1600 63 71 78 86 93 101
1700 66 74 81 89 96 104
1800 69 77 84 92 99 107
1900 72 80 87 95 102 110
2000 75 83 90 98 105 113
2100 78 86 93 101 108 116
2200 81 89 96 104 111 119
2300 84 92 99 107 114 122
2400 87 95 102 110 117 125
2500 90 98 105 113 120 128
2600 93 101 108 116 123 131
2700 96 104 111 119 126 134
2800 99 107 114 122 129 137
2900 102 110 117 125 132 140
3000 105 113 120 128 135 143
3100 108 116 123 131 138 146
3200 111 119 126 134 141 149
3300 114 122 129 137 144 152
3400 117 125 132 140 147 155
3500 120 128 135 143 150 158
Table 2A: Continuous Ventilation Rate in CFM
per ASHRAE 62.2-2010 Standard
Table 2B: Continuous Ventilation Rate in CFM
per ASHRAE 62.2-2013/2016 Standard
P/N 780100700 07/18 Rev F
Continuous Calculation

Page 8 of 36
2B. DETERMINE FRESH AIR INTAKE
P/N 780100700 07/18 Rev F
Flow Hood Anemometer Method
1. Use a flow hood or handheld rotary blade anemometer. Follow the instruments recommend
procedures for obtaining an accurate measurement.
2. During a Heating and Cooling cycle take a measurement and record the CFM volume through the
outdoor fresh air intake.
Heat
Cool
Static Pressure Method
1. Locate where the fresh air intake and return air duct connect.
2. Use a monometer following the instruments recommended procedure for obtaining an accurate
static pressure measurement. Take measurements in the fresh air intake duct approximately one
foot from the return air and fresh air intake connection.
3. Record the average static pressure measurement for a heating and cooling cycle.
4. Determine the fresh air intake internal round duct size and type. If square or rectangular duct
convert free area to the nearest round duct size.
5. Determine the fresh air intake systems total equivalent feet.
How many elbows, reducers and straight pipe used in construction of the fresh air intake duct.
For additional details see section 10.
6. Using table 3
a) Select your damper and air intake hood size.
b) Moving to the right select your systems total equivalent feet
c) From the top locate your systems Cooling or Heating cycle measured negative static
pressure.
d) Select your systems duct type Smooth or Flex
e) Drop down your selected duct type column to where it intersects with your
predetermined equivalent feet row.
f) Your estimated Cooling CFM has been determined. Record and save.
g) Repeat the process if Heating cycle static pressure is different.
Note: If Cooling and Heating cycle static pressure is the same continue.

Page 9 of 36
Table 3: Fresh Air Damper Sizing Air Flow (CFM) Table
P/N 780100700 07/18 Rev F
Determine Determine
Static (Heat Mode) Static (Cool Mode) Equiv. Ft. Heat CFM Cool CFM
Control Setup
Set CFM Continuous Dial
Carefully adjust the CFM continuous dial. Use the recorded volume that was determined from table
2A or 2B and recorded in Section 2A.
Note: Locate arrow on the dial stem. Align to the desired continuous volume.
Set CFM Cool Vent Dial
Carefully adjust the CFM Cool Vent dial. Use the recorded volume that was determined from using
one of the previous methods and Recorded in Section 2B.
Note: Locate arrow on the dial stem. Align to the desired volume.
Set CFM Heat Vent Dial
Carefully adjust CFM Heat Vent dial to volume determined from using one of the predetermined
methods and recorded in Section 2B.
Note: Locate arrow on the dial stem. Align to the desired volume.
If Static and Duct Design are Known Use Table 3
1. Enter Intake Design Static Pressure
2. Enter Intake Duct Equivalent Feet
3. Type of Intake Duct - Smooth or Flex
4. Enter Diameter of Intake Pipe
5. Determine CFM from Table 3

Page 10 of 36
The FAVC is equipped with 4 DIP switches to configure climate settings, fan control with appliance
The FAVC is equipped with 4 DIP switches to configure climate settings, fan control with appliance
#3 and to enable or disable energy saving mode.
#3 and to enable or disable energy saving mode.
The FAVC is factory shipped with DIP switches 1 & 2 set
The FAVC is factory shipped with DIP switches 1 & 2 set
to ON (Enabled) position and DIP switches 3 & 4 OFF (Disabled) position.
to ON (Enabled) position and DIP switches 3 & 4 OFF (Disabled) position.
The 4 modes for
The 4 modes for
CLIMATE SETTINGS
CLIMATE SETTINGS
are: Disabled, Cold, Hot or Normal as controlled by DIP
are: Disabled, Cold, Hot or Normal as controlled by DIP
Switch
Switch
1 and 2 shown in Figure 3. Refer to Figure 4 to configure FAVC for Normal, Cold, Hot or to Disable
1 and 2 shown in Figure 3. Refer to Figure 4 to configure FAVC for Normal, Cold, Hot or to Disable
climate modes. The various climate operational tables are shown in Figures 6 (Normal Climate),
climate modes. The various climate operational tables are shown in Figures 6 (Normal Climate),
7 (Cold Climate) and 8 (Hot Climate).
7 (Cold Climate) and 8 (Hot Climate).
The FAVC is shipped from the factory: Normal (DIP Switches
The FAVC is shipped from the factory: Normal (DIP Switches
1 & 2 in ON position).
1 & 2 in ON position).
If you do NOT want to use humidity control function, change climate setting to
If you do NOT want to use humidity control function, change climate setting to
disabled.
disabled.
3A. CLIMATE ZONE INHIBIT OPTIONS
CLIMATE SETTING
DIP 1 DIP 2 FUNCTION
ON ON NORMAL
OFF ON COLD
ON OFF HOT
OFF OFF DISABLED
FIGURE 4:
DIP Switch Positions for Climate Setting
FIGURE 3: DIP Switches 1 and 2
3. INHIBIT SET-UP - DIP SWITCHES 1 & 2
For the three active climate modes (Hot, Cold and
For the three active climate modes (Hot, Cold and
Normal), the relative humidity will have a range of
Normal), the relative humidity will have a range of
limits based on outdoor temperatures. During the
limits based on outdoor temperatures. During the
summer months, when outdoor temperatures
summer months, when outdoor temperatures
are at 85°F or higher, the FAVC will prohibit
are at 85°F or higher, the FAVC will prohibit
ventilation if the measured RH is 65% or
ventilation if the measured RH is 65% or
above. When indoor RH drops below 60%,
above. When indoor RH drops below 60%,
the fresh air ventilation will be permitted. When
the fresh air ventilation will be permitted. When
outdoor temperatures drop below 80°F, the
outdoor temperatures drop below 80°F, the
indoor RH limits change. When the indoor
indoor RH limits change. When the indoor
RH rises above 55%, the fresh air ventilation is
RH rises above 55%, the fresh air ventilation is
prohibited.WhentheindoorRHdropsbelow50%the
prohibited.WhentheindoorRHdropsbelow50%the
ventilation will be permitted. RH limit function
ventilation will be permitted. RH limit function
has a 5% hysteresis before resuming fresh air
has a 5% hysteresis before resuming fresh air
ventilation.
ventilation.
One exception, during winter months
One exception, during winter months
when outdoor temperatures are cold, the fresh air
when outdoor temperatures are cold, the fresh air
ventilation will be
ventilation will be
permitted when RH values are
permitted when RH values are
above the 55% limit.
above the 55% limit.
During the Ventilation process
During the Ventilation process
in cold weather, if the RH increases, the RH limit
in cold weather, if the RH increases, the RH limit
will be enabled until the RH drops below 50%.
will be enabled until the RH drops below 50%.
In Climate Mode: DISABLED,
In Climate Mode: DISABLED,
the FAVC will
the FAVC will
operate with two temperature limits for hot and cold
operate with two temperature limits for hot and cold
temperature extremes. The high temperature limit
temperature extremes. The high temperature limit
is fixed at 100°F and low temperature limit is fixed
is fixed at 100°F and low temperature limit is fixed
at 0°F. Change in indoor Relative Humidity will
at 0°F. Change in indoor Relative Humidity will
have no effect on ventilation. Plenum protection will
have no effect on ventilation. Plenum protection will
remain active.
remain active.
P/N 780100700 07/18 Rev F

Page 11 of 36 P/N 780100700 07/18 Rev F
For all climate modes, the FAVC incorporates a hysteresis algorithm program designed to limit ventilation
control based on the relationship between outdoor temperature and relative humidity level changes
within the home.
FIGURE 5: Suggested Climate Zone Setting Based on North America Region
HOT CLIMATE
COLD CLIMATE
NORMAL CLIMATE
FIGURE 6: Normal Climate Operation
In Climate Mode: NORMAL The FAVC will provide fresh outside ventilation if the outside temperature is
between 100°F and 17°F depending on if the HVAC system is in heating or cooling mode and depending
on indoor relative humidity change during the ventilation cycle. Below 25°F outside temperature and in
heating mode, the ventilation is restricted to 25% depending on if indoor humidity is above or below 50%
RH. Above 90°F outside temperature and in cooling mode, the ventilation is restricted to 25% depending
on if indoor humidity is above or below 60% RH. Between 25-40°F outside temperature, ventilation
requires heating and if indoor humidity level is above 50% RH and RH continues to increase, then fresh
air ventilation is limited to prevent induct condensation from occurring.
3B. NORMAL CLIMATE ZONE

Page 12 of 36
P/N 780100700 07/18 Rev F
In Climate Mode: COLD The FAVC will provide fresh outside ventilation if the outside temperature
is between 100°F and 0°F depending on if the HVAC system is in heating or cooling mode and
depending on indoor relative humidity change during ventilation cycle. Below 25°F outside
temperature and in heating mode, the ventilation is restricted to 25% depending on if indoor
humidity is above or below 50% RH. Above 90°F outside temperature and in cooling mode, the
ventilation is restricted to 25% depending on if indoor humidity is above or below 60% RH. Between
25-50°F outside temperature, ventilation requires heating and if indoor humidity level is above 50%
RH and RH continues to increase, then fresh air ventilation is limited to prevent induct condensation
from occurring.
FIGURE 7: Cold Climate Operation
3C. COLD CLIMATE ZONE
In Climate Mode: HOT The FAVC will provide fresh outside ventilation if the outside temperature
is between 100°F and 25°F depending on if the HVAC system is in heating or cooling mode
and depending on indoor relative humidity change during ventilation cycle. Below 32°F outside
temperature and in heating mode, the ventilation is restricted to 25% depending on if indoor
humidity is above or below 50% RH. Above 90°F outside temperature and in cooling mode, the
ventilation is restricted to 25% depending on if indoor humidity is above or below 60% RH. Between
32-40°F outside temperature, ventilation requires heating and if indoor humidity level is above 50%
RH and RH continues to increase, then fresh air ventilation is limited to prevent induct condensation
from occurring.
FIGURE 8: Hot Climate Operation
3D. HOT CLIMATE ZONE

Page 13 of 36
4. OPTIONAL APPLIANCE MONITORING
The FAVC provides 4 optional monitors to optimize energy usage and ventilation efficiency based on
activity of connected venting appliances. Refer to Figure 9 for optional appliance dial display and
Table 4 for Appliance dial ranges and factory settings.
The appliance monitoring connection terminal block (See Figure 1, on page 4) is used for connecting up
to four (4) separate optional appliances (multiple bathroom exhaust fans, clothes dryer, range hood,
etc.) for monitoring or interacting with exhaust operations. Please note any appliance can be moni-
tored if its air flow is within the appliance dial setting range. When appliances are active, the length
of time in operation and flow rate of the device are used to credit against the ventilation requirements.
Dwell time for appliance #1 and 2 is 2 hours maximum. Dwell time for appliance #3 and 4 is 4
hours maximum.The appliance monitoring features are based on the following equipment devices:
Appliance #1 – HRV/ERV or Bathroom Fan or Exhaust Fan Appliance
Appliance #2 – Bathroom Fan
Appliance #3 – Clothes Dryer or Central Vacuum
Appliance #4 – Kitchen Range Hood or Draft Assisted Gas Log Fireplaces
The four optional terminal input pairs are intended for a 24VAC signal (must have a common feed). Each
input pair is electrically isolated from the other pairs. Unused input pairs should be left unconnected. The
associated control setting does not matter if the input is not used. The optional inputs are not
required for FAVC to operate properly. Refer to Table 5 for additional information regarding normal and
optional operational conditions for Appliances 1 through 4.
FIGURE 9: OPTIONAL FAN MONITORING SETTINGS
Appliance
#1
Appliance
#3
Appliance
#4
Appliance
#2
P/N 780100700 07/18 Rev F
CFM Type of
Appliance
Settings
Factory Minimum Maximum
APPLIANCE #1 HRV/ERV or
Bathroom Fan 75 25 225
APPLIANCE #2 Bathroom Fan 75 20 140
APPLIANCE #3 Clothes Dryer 200 80 400
APPLIANCE #4 Kitchen Range Hood
or Draft Assisted
Gas Log Fireplace
850 100 1600
CONNECTION Type NORMAL Operation OPTIONAL Operation
APPLIANCE #1 Bath Fan
or
HRV/ERV
Monitoring:
(DIP 4 OFF)
Contributes to ventilation
whenever appliance #1 runs.
Energy Saving Mode:
(DIP 4 ON)
Drives Appliance #1 Fan when additional
ventilation is required in lieu of Central Fan
APPLIANCE #2 Bath Fan Monitoring None
APPLIANCE #3 Clothes Dryer
or
Range Hood
Passive Make-UP Air:
(DIP 3 OFF)
Opens Damper whenever
Appliance #3 is on.
Monitoring
Active Make-Up Air
(DIP 3 ON)
Turns on central fan & opens damper
whenever appliance #3 runs.
APPLIANCE #4 Comercial Range Hood
or
Gas Fireplace
Active Make-Up Air:
Will run central fan with damper
open when Appliance #4 is on.
Monitoring
None
TABLE 4: Appliance Dial Ranges and Factory Settings
TABLE 5: Appliance Connection Type and Operational Condition

Page 14 of 36
Appliance #1 input monitoring terminals are designated as A1 and A1C. The A1C terminal
should be connected to common 24VAC power. The control setting represents the air flow rate
of the appliance that is being monitored (set the CFM Appliance #1 air flow dial setting to
match appliance air flow rating or measured air flow rating). If the FAVC is set to energy saving
mode, the control setting represents the flow rate of exhaust appliance that is controlled by the
FAVC “E” terminals (set the CFM Appliance #1 air flow dial setting to match the exhaust fan,
bathroom fan or HRV/ERV device measured air flow rating). When FAVC is set to energy sav-
ing mode, the FAVC will not control the central fan on the air handler unit but will power the “E”
terminals to operate a remote relay to turn ON/OFF the exhaust fan, bathroom fan or HRV/ERV
devices. The air flow range for appliance #1 is 25 to 225 CFM and is initially factory set at 75
CFM.
Appliance #2 input monitoring terminals are designated as A2 and A2C. The A2C terminal
should be connected to common 24VAC power. This input is typically used to monitor a bath-
room fan or other suitable exhaust fan appliance. The control setting represents the air flow
rate of the appliance that is being monitored (set the CFM Appliance #2 air flow dial setting to
match appliance air flow rating or measured air flow rating). The Appliance #2 monitor setting
will only take effect if the signal to the A2, A2C terminals is active. This will be an additional ex-
haust flow monitored and be added to the Appliance #1 air flow usage if present when the en-
ergy conservation mode is enabled. If energy saving mode is disabled (OFF), the total air flow
usage that is monitored from appliance #1 and #2 will be credited against required ventilation
based on the continuous CFM setting. The air flow range for appliance #2 is 20 to 140 CFM and
is factory set at 75 CFM.
Appliance #3 input monitoring terminals are designated as A3 and A3C. The A3C terminal should
be connected to common 24VAC power. This input is typically used to monitor a clothes dryer or
other medium CFM suitable exhaust fan appliance. The control setting represents the air flow rate of
the appliance that is being monitored (set the CFM Appliance #3 air flow dial setting to match ap-
pliance rating or measured air flow rating). The air flow range for appliance #3 is 80 to 400 CFM
and is factory set at 200 CFM. The input signal for appliance #3 is used for ventilation control by
the FAVC in two different modes depending on DIP Switch 3 position. This feature is shipped OFF
(DISABLED) from the factory. If the DIP Switch 3 is set to:
ON - The FAVC will directly control the central fan whenever appliance #3 input
terminal is energized. When active, appliance #3 will override the temperature and
humidity limits.
OFF - The FAVC will accumulate run time of exhausting appliance whenever appliance #3
input terminal is energized based on dial setting for CFM Appliance #3 and use this
information to decide if minimum ventilation requirements have been met or adjust
ventilation time-on duration on the next ventilation cycle.
Appliance #4 input monitoring terminals are designated as A4 and A4C. The A4C terminal
should be connected to common 24VAC power. This input is typically used to monitor a kitchen
range hood, draft assisted gas log fireplaces or other large CFM suitable exhaust fan appliance.
The control setting represents the air flow rate of the appliance that is being monitored (set the CFM
Appliance #4 air flow dial setting to match appliance rating or measured air flow rating). The air
flow range for appliance #4 is 100 to 1600 CFM and is factory set at 850 CFM. Whenever appli-
ance #4 input terminal is energized, the FAVC “V” (ventilation device) and “E” (exhaust fan device)
output terminals are energized and the central fan is turned on. This will force fresh air ventilation
and air recirculation for as long as appliance #4 is active. The FAVC will calculate a dwell time
based on Appliance #4 CFM rate and length of operation of Appliance #4. When active, appliance
#4 will override the temperature and humidity limits.
P/N 780100700 07/18 Rev F

Page 15 of 36
Energy Saving Mode is a configurable feature designed to allow
the FAVC to control or not to control the central fan during a call for
ventilation when the thermostat is not in a heating or cooling mode
condition. If energy saving mode is ON (ENABLED) and the
thermostat requires a heating or cooling action, the CFM Heat Vent
and CFM Cool Vent dial rates for heating and cooling modes are
used in combination with CFM continuous dial rate to determine
if the HVAC has operated long enough to meet the ventilation
requirement. If the heat or cooling run time driven by the thermostat
does not meet the required ventilation run time for the heat/cooling
event, the FAVC will keep the fresh air damper open and activate
the auxiliary exhaust device once the central fan has shut down
due to the thermostat control call. In specific terms, the vent (V) and
auxiliary fan (E) terminals of the FAVC will remain active based
on the required time to meet ventilation requirements using the
Appliance #1 flow rate setting.
DIP 3 FUNCTION
ON FAN CYCLES WITH
APPLIANCE #3 INPUT
OFF FAN DOES NOT CYCLE WITH
APPLIANCE #3 INPUT
ENERGY SAVING MODE
DIP 4 FUNCTION
ON ENERGY SAVINGS MODE,
EXHAUST FAN CONTROL
OFF DISABLED
FIGURE 11: DIP Switch 3 Fan-
Activity with Appliance #3
FIGURE 13: DIP Switch 4
Energy Saving Mode
P/N 780100700 07/18 Rev F
5. MAKE-UP AIR OPTIONS - DIP Switch 3
To ENABLE Energy Saving Mode, set DIP Switch 4 to ON (ENABLE) to allow the FAVC to not control the
central fan during a call for ventilation. In the ENABLE mode, the FAVC will independently energize the
vent (V) and auxiliary fan (E) terminals when fresh air ventilation is required; and the HVAC system is
not running. Refer to Figure 12 and Figure 13 for DIP Switch 4 setting to configure FAVC central fan
control during a call for ventilation function.
This is ideal for use with an ERV/HRV system or to remote control a bathroom fan or exhaust fan. The
FAVC will operate the central fan of the air handler under specific conditions, regardless if energy
saving mode is ON or OFF:
Condition 1 If the thermostat has had no calls for heat or cooling with in a 4-hour time
period, the FAVC will cycle the central fan for one ventilation time period,
Condition 2 If appliance #3 has input monitoring event and DIP Switch 3 is set to
ON, the central fan will operate whenever the appliance #3 is turned on, or
Condition 3 If appliance #4 has an input monitoring event, the central fan will operate
whenever appliance #4 is turned on.
FIGURE 10: DIP Switch3
6. ENERGY SAVING OPTION - DIP Switch 4
With the Energy Saving Mode OFF (DISABLED), the FAVC will turn ON the central fan and activate the
vent (V) terminal for all ventilation requirements even if the thermostat is idle or off.
FIGURE 12:
Energy Saving DIP Switch 4
The FAVC is equipped with two make-up air features for use
with high flow exhaust appliances such as kitchen range hoods,
clothes dryers, and draft assisted gas log fire places. The primary
make-up air function is associated with appliance #4. When a signal is
present on appliance #4 terminals, (A4 and A4C), the fresh air
damper will open and the central fan will run. The secondary
make-up air function is associated with appliance #3. This feature is
configurable with dip switch 3. With the dip switch 3 set to off (de-
fault), will set the appliance #3 in a passive ventilation mode, such that
only the fresh air damper will open when the appliance #3 is active. To
select the make-up air mode for appliance #3, set dip switch #3 to
on. When appliance #3 is active, the fresh air damper will open and
the central fan will run. Refer to Figure 10 and 11 to set dip switch 3.

Page 16 of 36
The Fresh Air Ventilation Controller (FAVC) has been designed to install directly to the return air
plenum of your HVAC system, refer to Figures 14 and 15 for additional installation information. The
FAVC can be installed on the wall in the return air stream as close to the return air vent of HVAC
system when the small room is designed to act as a return air plenum using the optional FAVC
mounting bracket (Field Controls P/N: 602600150), refer to Figure 16 for return air closet
installation information.
7A. INSTALLATION LOCATIONS
7. INSTALLATION
7Ai. FAVC location
FIGURE 14 - Attic/Horizontal Air Handler Installation
FIGURE 15 - Basement/Vertical Air Handler Installation
OPTIONAL INLINE HEATER
(REQUIRED FOR COLD
REGION ONLY)
OPTIONAL INLINE HEATER
(REQUIRED FOR COLD
REGION ONLY)
P/N 780100700 07/18 Rev F

Page 17 of 36
FIGURE 16 - Return Air Closet Installation
SUPPLY DUCT
FURNACE/
AIR
HANDLER
FILTER/TRIO 1200/2000
FRESH
AIR
DAMPER
FRESH AIR
OUTSIDE WALL
FRESH AIR
INTAKE HOOD
W/SCREEN
OUTDOOR
TEMPERATURE
SENSOR
R/A VENT
FROM HOME
FAVC ON
WALL
MOUNT
BRACKET
INSIDE
WALL
OPTIONAL INLINE HEATER
(REQUIRED FOR COLD
REGION ONLY)
P/N 780100700 07/18 Rev F

Page 18 of 36
After a mounting location for controller has been selected, affix the hole template provided with
FAVC installation kit, Figure 18 (dwg: 780101300) to return air plenum and mark the locations for
two mounting holes and sensor hole. Drill two 0.136” diameter holes in metal ductwork for securing the
controller with two #8 sheet metal screws. Drill a 1-1/2 inch diameter hole (or penetrate the ductwork
and cut a 1-1/2 inch square hole) in ductwork to allow the controller’s Humidity/Temperature Sensor to
sense actual return air duct environmental conditions. The Humidity/Temperature sensor extends out from
the back of the controller plastic case. Refer to Figure 17 for exploded view of FAVC unit mounting to
ductwork.
WARNING: The controller is provided with pre-installed gasket material around the sensor.
Do not install controller without gasket seal material installed.
7Aii. FAVC Mounting
Figure 17: FAVC Mounted Directly to Ductwork
SIDE VIEW
Ø 0.136”
DIA HOLES
FIGURE 18 - Example of Template for FAVC Mounting (NOT TO SCALE)
P/N 780100700 07/18 Rev F

Page 19 of 36 P/N 780100700 07/18 Rev F
ASHRAE recommends that the fresh air intake be located at least 10 feet from any source of pollutants
such as auto exhaust, dryer exhaust, exhaust from any fuel-burning appliance, etc. Avoid installation
near odor sources such as garbage bins or barbecue grills. A minimum of 3 foot above ground is
recommended to avoid 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 code requirements
regarding fresh air inlets.
7Aiii. Intake Air Connection and Duct Installation
Ductwork Specification
• All flexible ducts must meet UL safety standards for Class I air ducts and connectors.
• All ducting must be installed according to HVAC codes and standards.
• All duct connections should be sealed with UL181 foil tape or mastic to prevent leakage.
• Insulated duct of at least R-4 insulating value with a continuous vapor barrier must be used for the
intake duct. The vapor barrier must be sealed at both ends.
• Exterior intake should be installed above snow line or a minimum of 18” above ground level,
whichever is greater.
• Exterior intake hood must be weather resistant and must have a screen (1/4” openings) to
prevent debris, animals and insects from entering ductwork.

Page 20 of 36
7Aiv. Fresh Air Damper (FAD) or HRV/ERV location
The fresh air damper (FAD) can be located anywhere in the fresh air inlet duct. Minimize the
length of the inlet duct to improve airflow and improve system efficency. It is recommended that the
damper be as close to the return air plenum as possible, and that the inlet duct connect to the
return plenum upstream of the system filter, and downstream of any duct-mounted sensors.
FIGURE 19 - Fresh Air Damper (FAD) and Fresh Air Intake location
FIGURE 20 - ERV/HRV and Fresh Air Intake location
The HRV/ERV unit should be installed in an area where the air is tempered to avoid freezing of the
condensate line. The contractor should install the unit in an area that is very accessible to allow the
homeowner easy access for maintenance.
It is very important to install an electric receptacle (115V) near the HVR/ERV, a seperate circuit
breaker is also recommended. You should have access to a condensate drain near the HRV/ERV to
avoid the use of condensate pump.
As a minimum, double the continuous ventilation flow rate for sizing the HRV/ERV product. Use the
HRV/ERV air flow rate as the CFM HEAT and CFM COOL dial setting one the FAVC unit.
P/N 780100700 07/18 Rev F
FAVC
6” - 10”
MINIMUM