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Energy Saving Mode
is a confi gurable 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 specifi c 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 fl ow 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 confi gure 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 specifi c 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 fl ow exhaust appliances such as kitchen range hoods,
clothes dryers, and draft assisted gas log fi re 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
confi gurable 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.
