Check-Out Communications To The Thermostat Network - Aprilaire 8800 System Installation Manual

CHECK-OUT COMMUNICATIONS TO THE THERMOSTAT NETWORK

This section confirms communications to each thermostat and each thermostats network address.
1. At the distribution panel turn on the communication switches A and B for the thermostat with address#1 (see FIGURE 15).
2. At the Hyperterminal program type: SN ID? and press Enter.
You should see response:
SN1 MODEL# 8800 VER: x.xxx - RPC 2011 (x.xxx represents the current firmware version number)
• If the response is not exactly as shown, there is a communication signal problem. The most likely sources are a loose terminal connection,
incorrect wiring, incorrect wire type, damaged wire, electrical interference or incorrect power supply.
3. Now back at the distribution panel turn on the communication switches A and B for the thermostat with address#2.
4. At the Hyperterminal program type: SN ID? and press Enter.
You should see response from both thermostats:
SN1 MODEL# 8800 VER: x.xxx - RPC 2011
SN2 MODEL# 8800 VER: x.xxx - RPC 2011
5. Repeat this process adding one thermostat each time to verify communications to all thermostats. Each time you turn on the communication
switches and send SN ID? command to a new thermostat, a new "SN" number should respond.
6. Once you have successfully completed this procedure you have verified that proper communication exists between the computer and all of the
thermostats. To test out all of the functions of the thermostat, use the software or automation package being installed with this system.
FIGURE 15 – Com Switches
A
ON OFF
B
ON OFF
A+ A- B+ B-
OFF ON
OFF ON
A
"A" LED flashes when communications
B
are transmitted by the thermostats
"B" LED flashes when communications
are transmitted by the host computer or
A
automation system.
B
15