iGrow 1800 Installation Guide
Page78
Link4 (714) 524-0004
The
OffTime
is the maximum off time that you will permit. If the accumulated VPD threshold is not
reached by the end of this time, the irrigation valve will be turned on as though the threshold was
reached. This is a backup position in case the sensor is not operating correctly or was inadvertently
removed.
CO
2
Equipment
05 CO2 CO2
Start
__at__
09:00A
End at 07:00P
The iGrow 1800™ can also be used to regulate the amount of CO
2
inside the greenhouse by controlling CO
2
pumps or injectors. This mode is active between the
Start
and
End
times. You have the option of controlling
the
Start
and
End
times based on a fixed time window or a relative time window. The latter is relative to the
sunrise and sunset times. When the cursor is over the
at
position and you press the
+
or
–
keys, you will cycle
through the three options:
SRise
,
SnSet
, and
at
.
When you set the parameters up for the first time as shown in the above screen, the Start and End times will be
adjusted every day thereafter, at 2 AM, to track the shortening and lengthening of the days.
Note:
It does not mean that the Start is exactly at the sunrise time, or the End at exactly at the sunset times.
You can select any time window. What it means is that the daily adjustment is per the change in the
sunrise and sunset time amounts. When the days get longer, the sunrise rise time will be earlier each
day and the sunset time will be later.
05 CO2 CO2
Min CO2 0 ppm
Max CO2 0 <=HEAT6
Min OLight 0 W/m2
Within the active time period, the iGrow 1800™ will inject CO
2
to the
Min CO
2
Level
, which is the minimum CO
2
level.
The iGrow 1600/1800™ will also inject CO
2
to the
Max CO
2
Level
, within the active time period, if both of the
following conditions are met:
1. The current cooling/heating stage is less than or equal to the indicated stage, where
H6<H5…<N<C1<….C6. This means that the iGrow 1600/1800™ will not inject CO
2
up to the
Max CO
2
Level
for cooling stages above the indicated stage. This can be used to prevent excessive loss of CO
2
due
to high fans and opened vents.
AND
2. The current light level must be above the programmed Min Outdoor Light threshold.
Note:
This mode requires the installation of the optional CO2 sensor and CO2 pump. If there is no light sensor
present, the iGrow 1600/1800™ will inject the CO
2
to the
Max CO
2
Level
assuming the condition (1)
above is satisfied.
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