iGrow 1800 Installation Guide
Page104
Link4 (714) 524-0004
With the iGrow1800 you have the ability to add the iMOD (Multi Output Device) Expansion Module. The iMOD
module adds 2 relay outputs to your iGorw1800 controller (Channels 13 and 14) plus two variable voltage
outputs, or variable current outputs (Channels 15 and 16).
Enabled
The Enable/Disabled field simply switches communications with the expansion iMOD expansion board on or off.
CH15 Voltage/Current
This setting configures Output Channel 15 to output either 0 to 10V, or 4 to 20mA
CH16 Voltage/Current
This setting configures Output Channel 16 to output either 0 to 10V, or 4 to 20mA
Heat Demand
One of the iGrow1600/1800’s advanced features is Heat Demand, predictive control. This feature helps you
optimize the efficiency of your greenhouse while reducing equipment usage by changing more gradually rather
than by waiting until conditions have already changed.
Heating Demand
Design Delta 45.0 F
Max
OLight 1200W/m2
Max Wind 80mph
Design Delta
The Design Delta is maximum difference between the outside temperature and heating setpoint that the heating
system can maintain.
Max OLight
Max OLight is the maximum Outdoor light level typically experienced by the greenhouse. This value is used to
calculate heat demand based on light. 1200W/m2 is a good approximation for North America.
Max Wind
Max Wind is the maximum wind speed experienced by the greenhouse. This is used to calculate heat demand
based on wind speed.
Heating Demand
OLight Factor 0%
Wind Factor 0%
OLight Factor
OLight Factor is a percentage of the outdoor light influence on determining heat demand. 0% represents no
influence, while 100% represents maximum influence.
Wind Factor
Wind Factor is a percentage of wind’s influence on determining heat demand. 0% represents no
influence, while 100% represents maximum influence
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