Page 19 of 57
Page 19 of 57
SK2016 HW-V-AECM-001
D.
Control Specifications: Complete Control PCB - S Type Control
Used in all High-Wall [V/P] ~S unit configurations.
Abbreviations
Ts =
Setting temperature
Tr =
Room air temperature
Ti1 =
Chilled water coil temperature
Ti2 =
Hot water coil temperature
AUX1
= Hot water free contact
AUX2
= Chilled water free contact
MTV1
= Chilled Motorized valve
MTV2
= Hot Motorized valve
D.1.
Definition of Input/Output
I/O
Code
2-Pipe
4-Pipe
Analogue Input
Return air sensor
AI1
Return air temperature (Tr)
2-pipe coil circuit sensor
AI2
Chilled / hot water coil
circuit (Ti1)
Chilled water coil circuit
(Ti1)
Hot water sensor
AI3
N/A
Hot water coil circuit (Ti2)
Input
LED display / IR receiver
X-DIS1
Digital communication port to LED display / IR receiver
board.
Wired wall pad
TTL1
Digital communication port to wired wall pad board.
Digital input
Occupancy contact
On/Off
Window contacts: for remote ON/OFF
(when DIPB SW1 = 1).
Economy contacts: for remote activation of economy
mode (when DIPB SW1 = 0).
Electrical heater safety switch
EH
Voltage-free (NC). The contact is closed before the EH is
turned on.
Power input
Phase
L1
Power supply:
220V/1Ph/60Hz
115V/1Ph/60Hz
Neutral
N1
Earth
PE1
Voltage output
Fan
CN4
Fan driver
Valve 1
MTV1
2-pipe coil circuit valve
output – chilled / hot water
valve.
Voltage output (L)
2-pipe coil circuit valve
output – chilled water
valve.
Voltage output (L)
Valve 2
MTV2
Reserved
4-pipe coil circuit valve
output – hot water valve.
Voltage output (L)
Voltage of electrical heater (Live)
HEAT
Voltage output (L), maximum 25 A
Output
Stepping motor
CN1 / CN2
Louver stepping motor relay
Auxiliary contact 2
AUX2
Cooling mode signal relay (NO). Voltage free contact.
To ensure the sensitivity of the connection, please make
sure max wiring length < 100ft
Auxiliary contact 1
AUX1
Heating mode signal switch (NO). Voltage free contact.
To ensure the sensitivity of the connection, please make
sure max wiring length < 200” 100ft
Serial BUS port
CN3
Master-slave network serial connection OR
MODBUS / local PC host network serial connection.