Minimum Ventilation Cycles; Principle Of Operation; Minimum Ventilation Timer Settings - Airstream INTER 2V4SA User Manual

INTER 2V4SA
8. Minimum Ventilation
Cycles
8.1. Principle of Operation
Definition: Minimum ventilation cycles are
activated when the room temperature is
lower than the set point. Running the fans
even though ventilation is not required for
reducing the room temperature is useful to
reduce humidity levels and supply oxygen
to the room. It also prevents the fans from
freezing in winter.
Minimum Ventilation Timer: During the
"On Time", the fans of stage 1 run at their
minimum speed and Stage 1 status LED is
on; during the "Off Time", the fans return
to a stop and the status LED switches off.
Note that the minimum speed of stage 1 can
automatically be adjusted over time with a
ramp (see below).
Min.Vent
Ventilation Timer
Status
ON
OFF
On Time
The controller supplies maximum voltage
to the variable-speed fans for 2 seconds
at each start-up.
22
INTER 2V4SA, rev.02
Minimum
Time
Off
Time
8.2. Minimum Ventilation
Timer Settings
The On and Off Times of the minimum ventila-
tion timer can be adjusted between 0 and 900
seconds, in increments of 15 seconds.
To run the fans continuously at minimum
speed, set the Off Time to zero and On
Time to any value other than zero.
To stop the fans, set the On Time to
zero and Off Time to any value.
To run the fans intermittently, set the
On Time to the desired running time and
Off Time to the desired off time.
• Select the STAGE 1 BANDWIDTH/TIMER
menu.
• Press the Other Functions button. The
On Time of stage 1 flashes on the display
"t. On".
• Use the adjustment buttons to set it to the
desired value.
• Press the Other Functions button. The
Off Time of stage 1 flashes on the display
"t. Off".
• Use the adjustment buttons to set it to the
desired value.