6.4.
Merging Fan Stages
Refer to the User Setup Menu to en-
able the Stage Merge options.
6.4.1. Merging Fan Stages 1 & 2
The transition from Stage 1 to Stage 2 can cre-
ate jumps in the volume of displaced air. This
can be smoothed out by merging stages. When
the merge between stages 1 and 2 is activated,
the speed of Stage 1 fans is decreased to match
the speed of Stage 2 fans when Stage 2 fans
start up. As the temperature increases, the
fan speed of both stages increases to create
a smooth progression. When the temperature
reaches Stage 2 Start Temp + #of degrees to
reach 100% of fan stage 2, Stages 1 and 2
both reach their maximum speed.
Merge between Fan Stages 1 & 2
Stage 1
Start T°
Stage 2
Start T°
Speed of
Fan Stage 1 (%)
100%
Stage 1
(Min speed)
Stage 2
(Min speed)
Off
Room T°
0.3°F
# of degrees to
reach 100%
of stage 1
# of degrees to
reach 100%
of stage 2
Min.
Vent.
Merge between Fan Stages 2 & 3
Stage 2
Start T°
Stage 3
Start T°
Stage 3
Stop T°
Ventilation
Stage 3 On
Stage 3 Off
Stage 2
(Min speed)
Stage 2
(Full speed)
Stage 2 Off
Room T°
# of degrees to
reach 100%
of stage 2
# of degrees to
reach 100%
of stage 3
Stage 2 Min.
Vent. Timer
6.4.2. Merging Stages 2 and 3
The transition from Stage 2 to Stage 3 can
create jumps in the volume of displaced air.
This can be smoothed out by merging two
stages. When the merge between stages 2
and 3 is activated, the speed of stage 2 fans
is decreased when stage 3 fans start up.
As the temperature increases, the speed of
stage 2 fans is increased to create a smooth
progression. When the temperature reaches
stage 3 start temp. + #of degrees to 100% of
stage 3, stages 2 fans reach their maximum
speed once again and stage 3 fans operate
at their full speed.
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EXPERT 2V3SA, rev.10
EXPERT 2V3SA
11.2. Inlet & Chimney Settings
1. From the main menu, select the option that
corresponds to the type of air inlet you
want to adjust:
INLET
0-10V OUTPUT /CURVE
If you are selecting a 0-10V output,
make sure the function of this out-
put is set to “Chimney” in the User
Setup Menu before adjusting the
parameters below.
2. Use the navigation keys to select the fol-
lowing parameters:
Min Spd 45%
St. 0 10%
St. 1 20%
St. 1Hi 30%
...
St. 80%
Total run time
1:15min
Max opening
100%
Degrees to max
opening 2.0°F
Accuracy
+/- 2sec
...
Under run open
time 0sec
3. Set the following parameters:
(The parameter adjustment process is explained
in section 3.2 on page 8).
Min Spd —
During the minimum ventila-
tion cycles and in stage 1, the inlet will
use its minimum ventilation position (Step
1) as long as the fan speed is lower than
the
“Min Speed”
value. Once the minimum
speed is reached and keeps increasing the
inlet will open further towards Step 1 Hi
opening. Set the minimum fan speed to
the desired value.
St.x —
Assign an actuator opening (in %)
with the startup of each fan stage.
St.x Hi —
Assign the actuator opening (in
%) that must be used when a variable fan
stage reaches full speed
Total run time (inlet only) —
Enter the
exact time that is required to reach the
actuator’s maximum limit switch. The
controller will limit the opening of the inlet
according to this parameter value.
Max opening (inlet only) —
Set the opening
that is reached beyond the start tempera-
ture of the last ventilation stage.*
This pa-
rameter is accessible if the over-opening function
is enabled in the User Setup Menu.
Degrees to max opening (inlet only)—
Set
the temperature range over which the ac-
tuator opens beyond its last stage opening
towards its maximum opening (see previ-
ous graph). This parameter ranges from
0.5 to 20°F (0.3 to 11.1°C).*
This parameter
is accessible if the over-opening function is en-
abled in the User Setup Menu.
Accuracy (inlet only)—
To prevent the
actuator from flickering, a minimum
opening or closing command is required
for the actuator to start moving. Set this
parameter to the desired value (from 1 to
15 seconds).
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EXPERT 2V3SA, rev. 10
EXPERT 2V3SA
