Field Controls FAVC Installation Manual page 14

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 fl ow rate
of the appliance that is being monitored (set the CFM Appliance #1 air fl ow dial setting to
match appliance air fl ow rating or measured air fl ow rating). If the FAVC is set to energy saving
mode, the control setting represents the fl ow rate of exhaust appliance that is controlled by the
FAVC "E" terminals (set the CFM Appliance #1 air fl ow dial setting to match the exhaust fan,
bathroom fan or HRV/ERV device measured air fl ow 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 fl ow 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 fl ow
rate of the appliance that is being monitored (set the CFM Appliance #2 air fl ow dial setting to
match appliance air fl ow rating or measured air fl ow 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 fl ow monitored and be added to the Appliance #1 air fl ow usage if present when the en-
ergy conservation mode is enabled. If energy saving mode is disabled (OFF), the total air fl ow
usage that is monitored from appliance #1 and #2 will be credited against required ventilation
based on the continuous CFM setting. The air fl ow 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 fl ow rate of
the appliance that is being monitored (set the CFM Appliance #3 air fl ow dial setting to match ap-
pliance rating or measured air fl ow rating). The air fl ow 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 fi replaces or other large CFM suitable exhaust fan appliance.
The control setting represents the air fl ow rate of the appliance that is being monitored (set the CFM
Appliance #4 air fl ow dial setting to match appliance rating or measured air fl ow rating). The air
fl ow 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
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