Page 3
Contents
Preface ............................................................................................................................................................................. i
Safety warnings ............................................................................................................................................................ i
Disclaimer ..................................................................................................................................................................... ii
Document Amendment Register .................................................................................................................................. iii
Firmware Revision History ........................................................................................................................................... iv
1.
Safety precautions ................................................................................................................................................ 5
2.
Overview ................................................................................................................................................................ 6
3.
Installation ............................................................................................................................................................. 7
3.1.
Physical connection ........................................................................................................................................ 7
3.2.
Power supply .................................................................................................................................................. 7
3.3.
RS-485 connection ......................................................................................................................................... 7
4.
DIP switch settings ............................................................................................................................................... 8
4.1.
Modbus Slave ID ............................................................................................................................................ 8
4.2.
RS-485 communication settings ..................................................................................................................... 9
4.3.
Protocol selection ........................................................................................................................................... 9
4.4.
Auto Mode / Lock Mode selection .................................................................................................................. 9
4.5.
Deadband Mode ............................................................................................................................................. 9
4.6.
Setpoint Limiting ........................................................................................................................................... 10
4.7.
Timeout ........................................................................................................................................................ 10
4.8.
Input type selection ...................................................................................................................................... 10
4.9.
Summary ...................................................................................................................................................... 11
5.
Connections ........................................................................................................................................................ 12
5.1.
Overview ...................................................................................................................................................... 12
5.2.
CN92/CN105 ................................................................................................................................................ 12
5.3.
RS-485 ......................................................................................................................................................... 12
5.3.1.
RS-485 termination resistor ................................................................................................................... 12
5.4.
Analogue Inputs ........................................................................................................................................... 13
5.4.1.
Input type selection ............................................................................................................................... 13
5.4.2.
S.P. ....................................................................................................................................................... 13
5.4.3.
MODE ................................................................................................................................................... 13
5.4.4.
FAN SPEED .......................................................................................................................................... 13
5.4.5.
OCC MODE .......................................................................................................................................... 13
5.5.
Digital Inputs................................................................................................................................................. 14
5.5.1.
FORCE ON ........................................................................................................................................... 14
5.5.2.
FORCE OFF ......................................................................................................................................... 14
5.5.3.
AUTO/LOCK MODE .............................................................................................................................. 14
5.5.4.
FAULT ................................................................................................................................................... 14
5.6.
Relay Outputs ............................................................................................................................................... 15
5.6.1.
ON/OFF................................................................................................................................................. 15
5.6.2.
HEATING .............................................................................................................................................. 15
5.6.3.
COOLING .............................................................................................................................................. 15
5.6.4.
FAULT ................................................................................................................................................... 15
5.7.
Using Twin / Triple / Quad systems .............................................................................................................. 16
5.7.1.
When Fault output is being used ........................................................................................................... 16
5.7.2.
When Fault output is not being used ..................................................................................................... 16
5.8.
Using single split units in a group ................................................................................................................. 17
5.8.1.
When Fault output is being used ........................................................................................................... 17
5.8.2.
When Fault output is not being used ..................................................................................................... 17
5.9.
Using MXZ split units .................................................................................................................................... 18
6.
Status LEDs ........................................................................................................................................................ 19
6.1.
Relay Status ................................................................................................................................................. 19
6.2.
Communication Status ................................................................................................................................. 19
7.
Control for ATA systems ................................................................................................................................... 20
7.1.
Setpoint control ............................................................................................................................................ 20
7.2.
Mode control................................................................................................................................................. 21
7.3.
Fan Speed control ........................................................................................................................................ 22
7.4.
Occupancy Mode ......................................................................................................................................... 23
7.5.
Force On ...................................................................................................................................................... 24
7.6.
Force Off ...................................................................................................................................................... 24
7.7.
Auto Mode / Lock Mode ............................................................................................................................... 24
7.7.1.
Auto Mode ............................................................................................................................................. 24
7.7.2.
Lock Mode ............................................................................................................................................. 24
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