Greenheck Microprocessor Controller Reference Manual page 39

Address in Microprocessor
Dip Switch Set on Stat
In order for the room thermostat to communicate with the microprocessor, the correct baud rate must be set in the
room thermostat. To set the baud rate:
• The "PROG" DIP switch on the back of the room thermostat must be flipped to the right side.
• Use the Setpoint Down button to display P11 on the room thermostat.
• Push the Scroll button and use the Setpoint Up/Down buttons to adjust the baud rate to 192.
• Once 192 is displayed, push the Scroll button again to save the setting. Once the setting is saved, P11 should
appear on the display.
• Flip the "PROG" DIP switch on the back of the room thermostat back to the left. The room thermostat should
communicate and be set back to normal mode.
If the occupancy override time needs to be adjusted:
®
Appendix: Room Thermostat Quick Start
Status LED
Green indicates that the unit is operating properly.
Red indicates that there is a problem with the unit.
Terminal
GND
Net B
Net A
Power
Unit
Controller
+Vtermo
GND
-
Tx/Rx
+
Network LED
Flashing Red Slowly indicates that there has been no communications for 60 seconds.
Flashing Green Slowly indicates that there have been normal communications within
the last 60 seconds.
Flashing Green Slowly with Quick Red Flashes; the quick red flashes indicate active
communications.
Room Thermostat Modbus Address
T-Stat 1 (Display)
10
Sw 2 + Sw 8
Baud Rate Setting
Occupancy Override Time Adjustment
• If the occupancy override is enabled from the room thermostat or the unit
microprocessor, it will override for the period of time set on this menu screen.
• To adjust the temperature override time, enter the following menu options at the
controller, Cntrl Variables/Occupancy. Scroll down at the Occupancy Menu and
select Occ Timed Override. This menu will allow the user to enable occupancy
override from the controller and set override duration.
Description
Power Supply Ground (common to the controller)
RS485 network connection (Data - )
RS485 network connection (Data +)
Power supply hot
TAP-Stat
POWER
GND
NET B
NET A
T-Stat 2
11
Sw 1 + Sw 2 + Sw 8 Sw 4 + Sw 8
T-Stat 3 T-Stat 4
12 13
Sw 1 + Sw 4
Microprocessor Controller for DOAS 39