NMC-64 Irrigation
• Delta Pressure – Define whether filter flushing can be operated due to Delta
Pressure dry contact (Yes / No).
• Delay Delta Pressure (mm:ss) – define the time that the Delta Pressure dry
contact input must be closed for before a filter flushing cycle will be initiated. This
time is usually used to prevent unnecessary flushes from taking place.
• Delta Pressure Reiteration – number of consecutive filter flushing cycles due to
Delta Pressure that can take place without any breaks before the NMC-64 will
generate an alarm indicating that the Delta pressure sensor is defective. The NMC-
64 will than ignore the Delta pressure input and will continue flushing only
according to the set Time between Flushing until the alarm is reset.
• Dwell Time Main Filter Valve (Sec) – define how much time before the filter
flushing cycle is started the main filter valve must be on for. This output is typically
used to control a pressure-sustaining valve or to start a booster pump.
1.8 COOLING
The cooling / humidification program is used to keep the greenhouse temperature
below a set value and / or the humidity above a set value. Each program can be set to
maintain temperature or humidity as its first priority.
There are 5 Cooling programs available with 2 periods in each program. The periods
can be defined to overlap thus creating “dynamic” cooling or humidification.
Different temp. and humidity sensors can be connected to each program.
There are a few steps that should be defined prior to this screen:
Table 7.9 COOLING CONFIGURATION.
COOLING/HUMIDIFICATION PROGRAM
Program: 5 Status: Cooling
From To Above t° Below RH On Off
1
2
09:00 18:00 26.0 75
09:00 18:00 32.0 85
00:03 0:03:00
00:04 0:01:00
Cool# 1 2 3
Temp. Sens. : 0 0 Hum. Sens. : 1
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