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Plug & Run.
Locating Harvest-Master.
Harvest-Master is best fitted outside your Green House (only inside it if conditions are dry and no
condensing humidity). Harvest-Master will need to be physically located so that the 10-ft (3 metre)
control cables will reach from Harvest-Master to where you connect remote relay switches. Switch
relays can be located at the power socket or at the end of a power cord. You will need one relay switch
for each device you want to control. You may need more than one relay switch if you have more than
1.8kw at 120v or 2.4kw at 240v, of lights.
Power up Harvest-Master when you have connected everything you wish to control. Make sure
you check the “Harvest-Master Connections” page before connecting devices to Harvest-Master.
Connecting Equipment
Connecting Devices to Harvest-Master. It is recommended that users read the electrical safety section
before proceeding with this installation. This particularly applies if the TOTAL power requirement of
the devices you wish to control EXCEEDS 15 AMPS.
1) Lights. Connect your lights to a relay switch and plug this to the power socket. Run an RCA
control cable from the relay to Harvest-Master and connect it to the LIGHT output. See electrical
safety section. If more than 15 amps is required, several relay switches can be driven from the
single LIGHTS output (up to 6), using “Y” 2 to 1 RCA splitter cables, or use the SPARE output.
2) Extractor Fan(s). Connect fan(s) to a relay and plug this to a power socket. Run control cable
from the relay to Harvest-Master and connect to the FAN output.
3) Carbon Dioxide. Connect the solenoid on your carbon dioxide cylinder or the starter/power line
for your carbon dioxide generator to a relay switch, then plug the relay into a power outlet. Run a
control cable from the relay to Harvest-Master and connect it to the CO2 output.
4) Cooling Device. Connect an air conditioning unit to a relay and plug the relay into a power outlet.
Run control cable from the relay switch to Harvest-Master and connect to the “A/C” output.
5) Heater. Connect heater to a relay and plug the relay pack into a power outlet. Run control cable
from the relay pack to Harvest-Master and connect to the HEAT output.
6) Humidifier. Connect a humidifier to a relay switch, plug into a power outlet. Run a control cable
from the relay pack to Harvest-Master and connect to the HUMIDIFY control output.
7)
Dehumidifier. Connect a dehumidifier to a relay switch and plug into a power outlet. Run a
control cable from the relay to Harvest-Master and plug it to the DEHUMIDIFY output.
Connecting Sensors
1) Systems without Carbon Dioxide Sensor. The Temperature and Humidity sensor is the 10ft (3m)
cable with a RJ45 plug on the end. Plug the connector into the “Sensors” socket on the controller.
2) Systems with Carbon Dioxide Sensor. Connect the 10ft (3m) cable with 2x RJ45 connectors (like a
telephone connector) and plug one end into the “Sensors” connector on Harvest-Master, the other
into one of the connections on the carbon dioxide sensor. The temperature and humidity sensor
plugs into the other RJ45 connector on the carbon dioxide sensor.
Positioning Sensors
When positioning the sensors, make sure:
1) They are not in direct light from your grow lights. Make a paper or cardboard cover from a
piece of white card to protect sensors from direct light if you have no suitable shady spot(s).
2) Do not locate in a “dead spot”, such as a corner where air is poorly circulated.
3) They are at plant level, not above the top of the plants or below the container(s) the plants are in.
4) Carbon dioxide sensor is not too close to the carbon dioxide generator or CO
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outlets.
5) The temperature and humidity sensor is not located among the leaves of a plant.
