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To install the System Controller you will need to complete the following steps, which are described in
detail in the following sections:
1. Mount the System Controller in a suitable location
2. Connect power to the System Controller using the included transformer
3. Connect the System Controller to the Distribution Panel
4. Connect the System Controller to a network or a computer
To complete the installation, you will also need to provide the following:
120VAC power outlet within 6 feet of the System Controller
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The System Controller should be mounted to a wall at a location that:
Provides access to a power outlet
Provides access to an Ethernet network connection if you plan to access the System Controller
over a network
Provides access to a telephone line if you plan to dial in to the system
Provides easy access for cabling to interconnect the thermostat system: the included RS-485
serial communications cable is 3 ft long (additional cable can be used if needed)
The System Controller should be mounted in a dry location that maintains normal temperatures between
40 degrees F and 100 degrees F.
The System Controller does not need to be accessed in normal day-to-day operation, but should be
accessible for servicing.
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The System Controller comes with a power adapter that is approximately 6' long and plugs into a normal
120VAC outlet. Simply plug the power adapter into an electrical outlet and connect the power plug to the
6-30 VDC connector on the System Controller. Illumination of the red LED on the System Controller
indicates power has been established.
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The Distribution Panel is used as a hub to tie all the thermostats together and provide power to each
thermostat. The following diagram shows the connection from the System Controller to the Model 8818
Distribution panel.
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