Daikin ThinLine FCVC, Installation And Maintenance Manual

Page: 16 / 82

16
Daikin
IM 980-1
Operation and Maintenance
Accessories
Fresh Air Damper
The fresh air damper kit provides up to 25% outside air to the
unit heater. It consists of an intake with damper blade and
insect screen. The damper may be manually controlled through
the return air opening or with an optional field-installed
damper motor. For detailed installation information, refer to
page 37 .
Operation
To open the damper, reach under the unit and pull the damper
handle toward you. To close, push the damper away from you.
See
Figure 19 .
Figure 19: Opening and Closing the Damper
If the damper is difficult to open or moves too freely, you can
adjust the tension by tightening or loosening the nuts on its
pivot axis. See
Figure 20 .
Figure 20: Adjusting Damper Tension
Cold Weather Operation
Unit heaters may experience erratic operation during cold
ambient conditions with the outside air damper in the open
position.
Fresh Air Damper Motor Kit (Low Voltage)
This damper motor kit is for field installation with the fresh air
damper kit. The damper kit must be ordered separately. For
detailed installation instructions, refer to
page 39 , which is
supplied with the damper motor kit. Under most control
schemes, the damper motor is set up to open the damper
automatically whenever the unit fan is in operation.
Figure 21: Damper Motor Kit Installed in Unit
Condensate Overflow Detection Device
The condensate overflow detection device is a factory-installed
option on fan coils. This device has a condensate overflow
floater with dry contacts and is connected to the LV interface
board. See
Figure 22 .
If you suspect it is not working properly, check to be sure that
the float is installed straight up with the proper elevation. See
Accessing/removing the main drain pan and motor assembly‚
page 19
for instructions on removing the main drain pan to
access the device.
The condensate overflow switch needs to be wired to the
proper controller (T170 for example) to shut off the fan if
water is present in the drain pan.
Figure 22: Condensate Overflow Switch Installation
To open damper, reach under the unit
and pull the damper handle toward you
To adjust damper tension, loosen or
tighten nuts on each end of damper axis.