30
TC5-1N5FAB rev.06
TC5-1N5FAB
1
Viewing Relative Humidity
The relative humidity is expressed as a percentage.
n
Set the selection knob to
STAGE 1 — HUMIDITY CON-
TROL
. The current relative
humidity is displayed.
n
Turn the adjustment knob
clockwise by one notch. The
minimum humidity flashes on
the display, alternating with
the letters "
Lo
".
n
Turn the adjustment knob clockwise one notch further. The maximum
humidity flashes on the display, alternating with the letters "
Hi
".
n
Turn the adjustment knob clockwise a third notch. The current humid-
ity value is displayed again.
NOTE
: If you let the display flash for more than 10 seconds when the
maximum or minimum humidity is displayed, the controller resets the mini-
mum and maximum humidity values currently in memory (the display stops
flashing to indicate that the reset has been done).
2
Adjusting Relative Humidity Set Point
When the relative humidity exceeds the humidity set point, stage 1 mini-
mum speed is increased by a proportional amount to compensate for the
increase in humidity. Note that the humidity compensation feature must be
activated for this to work.
n
Set the selection knob to
STAGE 1 — HUMIDITY CONTROL
. The
current humidity reading is displayed.
43
TC5-1N5FAB rev.06
NATURAL VENTILATION
P
RINCIPLE OF OPERATION
In the example above, when the temperature rises to 89
o
F, the curtains
begin to open and continue to do so until fully open if the temperature
remains above this point. If the temperature falls to 88.7
o
F, the curtains
stop opening. When the temperature falls to 79
o
F, the curtains begin to
close and continue to do so until fully closed if the temperature remains
below this point. If the temperature rises to 79.3
o
F, the curtains stop clos-
ing. Note that if Stage 3 is configured for heating, the curtain dead band
begins at Ban Differential 2.
The controller uses a timer to open and close the curtains intermittently as
shown below:
Curtains close
in timer mode
Room
Temperature
Set Point = 75
o
F
Curtains
89
o
F
OFF
Curtains open
in timer mode
0.3
o
F
0.3
o
F
79
o
F
Dead Band
Ban Diff. 2
+ Diff. 3
The curtains open and close intermittently according to the time on and
time off settings:
OPEN/CLOSE
STOP
TIME ON
TIME OFF
