20 User Manual • Basic-Step
Viper Climate and Production Computer
2.2.4.2 Ventilation Status
2.2.4.2.1 Flap Opening
The Climate/Ventilation/Ventilation status menu
The flap opening is a percentage indication of how much the flaps of
both the air inlet and the air outlet are open.
If you are in doubt about the actual ventilation output, you can
compare the reading of the ventilation status in the ventilation menu
with the output that you can actually observe in the house. Thus, the
percentage indications are particularly relevant in connection with
fault finding.
2.2.5 Tunnel
Heat allowed in tunnel
Pad cooling
Humidity limit 85 %
Pad temperature 22.0 °C
Tunnel status
Tunnel inlet 1-2 0 %
Tunnel stage 1-16 OFF
Tunnel MultiStep 1-8 OFF
Table 9: Outline of the tunnel menu (changeable values are highlighted in bold types)
This section is relevant only to houses with tunnel ventilation.
Tunnel ventilation is used at high temperatures and when the air intake through wall inlets and curtains
is insufficient to keep the animals chilled. For tunnel ventilation, air is taken in through a pad cooling
system located at one end of the house. Air is vented out through several gable fans at the other end of
the house, which makes the air move in a lengthwise direction in the house. The high air speed in the
house provided by the gable fans and the effect of the pad cooling reduce the temperature in the house.
Pads are kept moist through recirculation of water, and the gable fans automatically draw fresh air
through the moist pads and absorb water vapour from them.
The high air speed at tunnel ventilation makes the measured temperature feel colder, making it more
comfortable for the animals.
All menu items … in the Tunnel menu can be read and set by
→ pressing the menu key
→ select
Climate, and press