Netafim NMC PRO CLIMATE - Ventilation System Control; PROGRAM - VENT (MENU 1.1)

NMC-PRO
USER GUIDE
Doc. Name: NMC-PRO ׀ User Guide Ver 3.05.03 Revision: 2.2 Page: 18
Crop Management Technologies
VENT
PROGRAM – VENT (MENU 1.1)
The goal of the Ventilation process is to maintain a fixed temperature in the green house.
The Ventilation control manages the vents operation according to the conditions of the
greenhouse.
The monitoring and operation is done per control (1-3) and within the control number the
controller should operate the vent individually. There are several inputs that influence the
calculation position of the vents, such as: inside and outside temperature, humidity, wind
speed, wind direction, radiation and rain.
Emergency cases like rain, storm or frost are monitored continuously and during such events
the controller reacts according to the configuration. The vent control should operate in
cooperation with other controls like fan & pad, screens, etc.
The vent types (top, side) are divided into vent controls. Each vent control includes lee side
and wind side.
• Wind side –The side that the wind enters the greenhouse.
• Lee side – The side opposite the direction of the wind.
N
EW
S
N
EW
S
Ridge direction (40
0
)
M1
M6
M5
M4
M3
M2
m
Vent motor
N
EW
S
N
EW
S
Ridge direction (40
0
)
M1
M6
M5
M4
M3
M2
m
Vent motor
- Vent position- Vent position
- Temperature
- Humidity
- Temperature
- Humidity
Lee sideWind side
Example of greenhouse vents position respectively to the north and lee/wind sides
The controller is able to determine whether each vent is either wind or lee through the vent
direction (each vent has its own direction) and wind direction measurements.