24
TC5-1N5FAB rev.06
TC5-1N5FAB
•
At Set Point + ban diff. 2
: stage 2 fans start running.
•
At Set Point + ban diff. 2 + diff. 3
: stage 3 fans start running.
•
At Curtain Opening Temp
: curtains open according to timer settings.
If the room temperature falls:
•
At Curtain Closing Temp
: curtains close according to timer settings.
•
At Set Point + ban diff. 2
: stage 3 fans return to a stop.
•
At Set Point + bandwidth
: stage 2 fans return to a stop; stage 1
fans start decreasing in speed as the temperature decreases.
•
At Set Point:
stage 1 fans reach minimum speed.
•
Below the Set Point
: stage 1 fans stop operating continuously and
operate according to the minimum ventilation cycle at minimum speed.
49
TC5-1N5FAB rev.06
TC5-1N5FAB
1
Adjusting Heater Offset for Cascading Heaters
The heater offset can provide substantial energy savings if correctly ad-
justed according to the outside temperature. It is the number of degrees
below the set point at which the heating units turn off (see diagram above).
The heater 1 and 2 offsets can be adjusted between -10
o
F and 20.0
o
F
(-5.6
o
C and 11.1
o
C). If the heater offset is negative, the heating units will turn
off at temperatures above the set point.
n
Set selection knob to
HEAT 1-
2 — OFFSET/DIFF.
The cur-
rent heating offset is displayed,
alternating with the letters
"
OFT
" and "
Ht.1
".
n
Use the adjustment knob to ad-
just the offset to the desired
value.
2
Adjusting Heater Differentials
The heating differential is the temperature difference between the moment
the heater units turn on and the moment they turn off (see diagram above).
The differential can be adjusted between 0.5
o
F and 20.0
o
F (0.3
o
C and 11.1
o
C).
n
Set the selection knob to
HEAT 1-2 — OFFSET/DIFF
. The current
heating offset is displayed, alternating with the letters "
OFT
" and "
Ht.1
".
n
Press the push-button. The heater differential for Heater 1 is dis-
played, alternating with the letters "
DIF
" and "
Ht.1
".
n
Use the adjustment knob to adjust the differential to the desired value.
n
Press the push-button. The heater differential for Heater 2 is dis-
played, alternating with the letters "
DIF
" and "
Ht.2
".
n
Use the adjustment knob to adjust the differential to the desired value.
