4
ST 5110
QM 1329.rev.00
V
ENTILATION SETTINGS
1
Adjusting the Stage 1 Bandwidth
The Stage 1 bandwidth is the temperature interval within which the Stage 1
variable-speed fans increase or decrease in speed proportionally to the
temperature (see the diagram above). The hysteresis is fixed at 0.3
o
F and
determines when the fans start operating according to the minimum ventila-
tion cycle. When this value is adjusted, all the starting values for consecutive
stages are adjusted by the same amount. The bandwidth can be adjusted
from 0.5°F to 20.0°F (0.3°C and 11.1°C).
n
Set the selection knob to STAGE 1 — BANDWIDTH. The current
bandwidth flashes on the display.
n
Use the adjustment knob to adjust the bandwidth to the desired value.
2
Adjusting the Stage 2 Starting Temperature
The Stage 2 starting temperature is the temperature at which the Stage 2 fans
start running (see the diagram above). The hysteresis is fixed at 1.5
o
F and
determines when the fans return to a stop. The difference between the
starting temperature and the bandwidth (stage 1) can go from 0.5°F to 20.0°F
(0.3°C to 11.1°C).
n
Set the selection knob to STAGE 2 — START TEMP. The current
starting temperature flashes on the display.
n
Use the adjustment knob to adjust the temperature to the desired value.
