26
INTER 2V4SA, rev.02
INTER 2V4SA
9.
Misting
The last cooling stage can be used as a mist
stage. Set internal switch #9 to ON to acti-
vate this stage. The number of heating stages
determines which stage is used for misting:
Number of heating
stages
Mist stage =
0
Stage 6
1
Stage 5
2
Stage 4
The mist stage cannot be used if two
heating stages are used.
• Mist units start running according to a
timer cycle (On Time and Off Time) when
their start temperature is reached (Set Point
+ Mist Differential).
• If the humidity compensation is activated,
mist units automatically stop when the hu-
midity level is too high.
Operating Diagram of
the Mist Output
Mist
Output
Status
Room T°
Off
On
Set Point
Mist Offset
Differential
I. Adjusting the Mist Differential
The mist differential is the variation in room
temperature between the moment mist units
turn on and the moment they turn off. It
can be adjusted between 0,3°C and 10,0°C
(0,5°F and 18,0°F).
• Select the
MIST OFFSET/DIFFERENTIAL
menu.
• Press the Other Functions button. The mist
differential is displayed, alternating with the
letters "
dIF
",
• Use the adjustment buttons to set it to the
desired value.
II. Adjusting the Mist Offset
The mist offset tells the controller when to
stop the mist stage (Set Point + Mist Offset).
It can be adjusted between 0,3°C and 22,0°C
(0,5°F and 40,0°F).
• Select the
MIST OFFSET/DIFFERENTIAL
menu. The mist offset is displayed, alternat-
ing with the letters "
OFSEt
".
• Use the adjustment buttons to set it to the
desired value.
III. Adjusting the Mist Timer
The On Time of the mist timer can be adjusted
from 0 to 900 seconds, in increments of 15
seconds; the Off Time can be adjusted from
0 to 60 minutes. To disable mist cooling, set
the On Time to zero.
• Select the
MIST TIMER
menu. The current
On Time for the mist cycle is displayed, al-
ternating with the letters "
t On
".
15
INTER 2V4SA, rev.02
INTER 2V4SA
7.
Fan Stages
7.1. Principle of Operation
The INTER 2V4SA controls two stages of vari-
able-speed fans (stages1-2) and four optional
stages of constant-speed fans (stages 3-6).
Fix hysteresis to stop fan stages:
On/off fan stages can either stop when the
room temperature falls below their respec-
tive differential or when it falls 1°C (1,8°F )
below the stage's differential (fix hysteresis).
Set internal switch #10 to the ON position
if you want to use the fix hysteresis of 1°C
(1,8°F ).
I. If the room temp. rises:
• When
room temperature < Set Point
,
stage 1 fans run at minimum speed according
to the minimum ventilation cycle.
• At Set Point: stage 1 fans stop operating ac-
cording to the minimum ventilation cycle and
increase in speed as the temperature rises.
• At Set Point + Bandwidth 1: stage 1 fans
reach their full speed.
• At Set Point + Bandwidth 1 + Stage 2
Offset: stage 2 fans start and stage 1 fans
go to their Override Min Speed.
• At Set Point + Bandwidth 1 + Stage 2
Bandwidth 2: stage 1 and stage 2
fans reach their max speed.
Fan Stages
Ventilation Level
Room T°
Stage 1
Min
Stage 1
Stage 2
Stage 3
Stage 4
Stage 5
Stage 6
Set Point
Stage 1
Bandwidth
Stage 2
Bandwidth
or
Fix hysteresis 1.0°C (1.8°F)
Fix hysteresis 1.0°C (1.8°F)
Fix hysteresis 1.0°C (1.8°F)
Fix hysteresis 1.0°C (1.8°F)
or
or
or
Stage 3
Differential
Stage 4
Differential
Stage 5
Differential
Stage 6
Differential
Stage 2
Offset
Min.V.
*Stage 2 starts at its minimum speed and Stage 1 goes to its
"Override Min Speed". Refer to section 7.1.1 on page 17 for
further information about the Stage Merge.
