No electrical contractor
is going to miss out on a job opportunity by admitting they are in over their
head with your environmental control system. Unfortunately it falls on you; the
grower, researcher, teacher, general contractor, architect, engineer, consultant
or project manager to do your research and hire someone that is qualified to
work with the specialized equipment and installations needed in the greenhouse
industry.
How many general electricians know things like:
That when opening curtains in the morning it is important to have them open slowly to mix the trapped cold air above with the warm air below, as opposed to having them open quickly and the cold air potentially stressing or damaging crops?
The various series of equipment operations related to the steps or stages on your controller to ensure that they are cycling properly?
The importance of properly setting vent motor limit switches to prevent vents from caving in or coming off of the rack and pinion, or the ideal maximum height at which vents are "fully" open to minimize wind damage.
That by having a large amount of HID lights in a house may cause the cooling system to cycle because of the excessive heat created by the lights, and how to remedy this.
That with some controls to maintain efficiency some equipment operations should be pulsed, such as heaters, so as to not overshoot the setpoint and begin cooling stages cycling heating and cooling stages constantly.
These are just a few things to consider.
