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63
HYDRONIC CASSETTE
Appendix I
MASTER AND SLAVE UNIT FUNCTION
The control PCB can be set either as a master unit or slave unit.
2.A.1 MASTER UNIT FUNCTION
a) The master unit sends data on its setting to the slave unit.
b) The master unit settings are Unit ON/OFF, Mode, Fan Speed, Set Temperature, Swing Function, and
Sleep Function for handset operation.
c) The master unit settings are Unit ON/OFF, Mode, Fan Speed, Set Temperature, Swing Function,
Sleep Function and Weekly Timer ON/OFF program for wall pad operation.
2.A.2 SLAVE UNIT FUNCTION
a) The slave unit receives data on its settings from the master unit.
b) The slave unit is allowed to change to a locally desired setting by local controller as long as there are
no subsequent changes to the settings of the master unit.
c) The slave units can be set individually for timer on and off function by handset or wall pad. The
handset cannot override wall pad timer and clock setting.
When unit is power on, buzzer responds as below:
With MTV: The master unit will beep 3 times, and the slave unit will beep once.
Without MTV: The master unit will beep 4 times, and the slave unit will beep twice
2.A.3 MASTER – SLAVE INSTALLATION
HANDSET AS MASTER CONTROL UNIT:
a) Connect all the units PCBs according to the wire color and type of connector.
b) Select the master unit by closing the SW6 DIP switch on the main PCB
c) Ensure the SW6 DIP switch in the PCB of the slave unit is opened.
d) Switch on the units by connecting the main power supply.
e) Using handset set the operation parameters for the Master unit which will automatically send the
settings to the slave unit.
f) Master unit will beep twice confirming receipt of commands while Slave unit will beep once.
WALLPAD AS MASTER CONTROL UNIT:
a) Connect all the units PCBs according to the wire color and type of connector.
b) Select the master unit by closing the SW6 DIP switch on the main PCB
c) Ensure the SW6 DIP switch in the PCB of the slave unit is opened.
d) Provide each slave unit an addressable code by closing SW1 – SW5 DIP switch according to the DIP
switch chart.
e) Switch on the units by connecting the main power supply.
f) Using the wall pad set the operation parameters for the Master unit which will send the setting to the
slave units based on Global-control communication or Addressable communication methods. For detail
please see 2.A.6 MASTER-SLAVE COMMUNICATION METHOD & Wall pad operation item 11
Networking Master – Slave control on page 49.
g) Master unit will beep twice confirming receipt of commands while Slave unit will beep once.
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