LG AR-DR12-05A Installation And Operation Manual page 49

Communication Setup
1. Press the UP and DOWN keys at the same time for 3 seconds.
2. When SETUP appears on the screen press ENTER.
3. Scroll DOWN (twice) to the NETWORK menu and press ENTER.
4. When NETOUT appears on the screen, press ENTER; when SET NETOUT appears on the screen, press ENTER again.
5. Scroll UP or DOWN to set the NETOUT = MODBUS and then press ENTER.
6. Scroll DOWN to NETADDR and press ENTER, when SET NETADDR appears on the screen press ENTER again.
7. Scroll UP or DOWN to set the NETADDR to the same address that was listed for the airflow monitor in the microprocessor. For instance,
the Outdoor Airflow Monitor screen above has an address of 31. Then press ENTER.
8. Scroll DOWN to NETBAUD and press ENTER, when SET NETBAUD appears on the screen, press ENTER again.
9. Scroll UP or DOWN until NETBAUD = 19200, then press ENTER.
10. Scroll down to PARITY and press ENTER, when SET PARITY appears on the screen press ENTER again.
11. Scroll UP or DOWN until PARITY = NONE2, then press ENTER.
12. Once the address is set and the communication wires are connected, "Status" LED should be a steady green and the "RS485" LED
should be a quick blinking green LED.
Optional Dirty Filter Switch
To adjust the switch, the unit must be running with all of the access doors in place, except for the compartment where the switch is located
(exhaust intake compartment). The adjusting screw is located on the top of the switch.
1. Open the filter compartment and place a sheet of plastic or cardboard over 50% of the filter
2. Replace the filter compartment door.
3. Check to see if there is power at the alert signal leads (refer to electrical diagram).
4. Whether there is power or not, turn the adjustment screw on the dirty filter gauge (clockwise if you did not have power, counterclockwise
if you did have power) until the power comes on or just before the power goes off.
5. Open the filter compartment and remove the obstructing material.
6. Replace the door and check to make sure that you do not have power at the alert signal leads. The unit is now ready for operation.
Figure 22: Optional Dirty Filter Switch
Positive pressure connection is toward
the back or bottom of the switch (Senses
pressure at air inlet side of lters)
Due to our policy of continuous product innovation, some specifications may change without notification.
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START UP COMPONENTS
Setscrew (on front of switch)
must be manually adjusted
after the system is in operation
Negative pressure connection
is toward the 'front or top' of
the switch. (Senses pressure
on the blower side of lters)
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