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INTER 2V4SA, rev.02
INTER 2V4SA
7.2. Fan Stage Settings
Refer to previous section of this manual to
get more information about the following
parameters.
I. Adjusting Stage 1-2 Minimum
Speed
The minimum speed can be adjusted between
10 and 100%.
• Select
STAGE 1 MIN SPEED/RAMP
menu
to
set the minimum speed of stage 1 or select
STAGE 2 MIN SPEED
to set the minimum
speed of stage 2. The minimum speed of
the selected stage flashes on the display,
alternating with the letters
"SPEEd"
.
• Use the adjustment buttons to set the
minimum speed of the selected stage to the
desired value.
Note that the minimum speed of stage 1
can only be modified if the speed ramp
is disabled (see section 8.4 on page 24).
II. Adjusting the Override Minimum
Speed of Stage 1
The Override Minimum Speed of stage 1 is
the speed reached by stage 1 fans at the
startup of stage 2. This parameter ranges
from 10 to 100%.
• Select the
STAGE 1 OVERRIDE MIN.SPEED
menu. The override speed of stage 1 flashes
on the display, alternating with the letters
"SPEEd"
.
• Use the adjustment buttons to set this
parameter to the desired value.
III. Adjusting Stage 1 Bandwidth
The bandwidth of stage 1 is the temperature
interval over which variable fans of stage 1 in-
crease or decrease in speed proportionally to
the temperature. It can be adjusted between
0,3°C and 10,0°C (0,5°F and 18,0°F).
• Select the
STAGE 1 BANDWIDTH/TIMER
menu. The bandwidth of stage 1 flashes on
the display, alternating with letters
"BAnd"
.
• Use the adjustment buttons to set it to the
desired value.
IV. Adjusting Stage 2 Offset
Stage 2 Offset signals the beginning of stage
2. Stage 2 starts when the room tempera-
ture reaches: Set Point + S1 Ban
S2 Offset. If you want stage 2 to start prior
to the end of stage 1, give the Offset a
negative value (see previous graph). Stage 2
Offset ranges from negative S1 bandwidth
to 10,0°C (18,0°F).
• Select the
STAGE 2 OFFSET/BANDWIDTH
menu. The offset of stage 2 flashes on the
display, alternating with the letters "
OFSET
".
• Use the adjustment buttons to set it to the
desired value.
V. Adjusting Stage 2 Bandwidth
The bandwidth of stage 2 is the temperature
interval over which stage 2 increases or
decreases in speed proportionally to the tem-
perature. It can be adjusted between 0,3°C
and 10,0°C (0,5°F and 18,0°F).
• Select the
STAGE 2 OFFSET/BANDWIDTH
menu.
• Press the Other Functions button. The
bandwidth of stage 2 is displayed, alternating
with the letters "
BAnd
".
• Use the adjustment buttons to set it to the
desired value.
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VI. Adjusting Stages 3-6 Differentials
Differentials tell the controller when to start
stages 3-6. If the controller does not use a
fix hysteresis to stop these stages, it then
uses differential values to stop them when
the remperature decreases (Refer to the "Fan
Stage" graph). Differentials can be adjusted
from 0,3°C and 10,0°C (0,5°F and 18,0°F).
• Select the
STAGES 3-6 DIFFERENTIAL
menu. The differential of stage 3 flashes on
the display, alternating with "
3 diF
".
• Use the adjustment buttons to set it to the
desired value.
• Press the Other Functions button to select
the differential of the next fan stage.
• Proceed in similar fashion to set the differ-
ential of stages 4 to 6 (if applicable).
VII. Adjusting the De-icing Timer
The de-icing cycle time is the period of time
separating de-icing cycles. It ranges from
1 to 720 minutes and must be greater than
the De-icing On Time. The de-icing On Time
ranges from 0 to 900 seconds.
• Select the
STAGE 2 DE-ICING
menu . The
de-icing cycle time is displayed, alternating
with the letters "
CYCLE
".
• Use the adjustment buttons to set it to the
desired value.
• Press the Other Functions button. The de-
icing On Time is displayed, alternating with
the letters "
t On
".
• Use the adjustment buttons to set it to the
desired value.
