79
7-3.
Hydro Unit Control
9) Control of Mode selection and forced stop & restart
You can change the operation mode and force the operation ON/OFF.
• Connect its connection cable to CN21 port on the PC board (MCC-1755) of the hydro unit.
Non-voltage contacts
9-1)Setting the inputs
I/P4: Heating/cooling mode switching input
• Non-voltage contact
Open: Heating mode
Close: Cooling mode
I/P5: Heating/cooling operation ON/OFF input
• Non-voltage contact
Open: Operation OFF (Remote controller OFF)
Close: Operation ON (Remote controller ON)
I/P6: Hot water operation ON/OFF input
• Non-voltage contact
Open: Operation OFF (Remote controller OFF)
Close: Operation ON (Remote controller ON)
I/P7: Emergency Shutdown input
• DN_B6 = “0”
• Non-voltage contacts
Open: Normal operation
Close: Emergency shutdown
It is possible to change the input signal when using I/P5, 6.
• DN_61 = “0”: Starts ESTIA as the circuit between the terminals I/P5, 6 is closed.
Stops ESTIA as the circuit between the terminals I/P5, 6 is opened. (Default)
• DN_61 = “1”: Starts/Stops ESTIA as the circuit between the terminals I/P5, 6 is received closed pulse signal.
It is possible to change the input signal when using I/P7.
• DN_52 = “0”: Stops ESTIA as the circuit between the terminals I/P7 is closed. (Default)
• DN_52 = “1”: Stops ESTIA as the circuit between the terminals I/P7 is opened.
Related DN
Item Operation flow and applicable data, etc.
MCC-1755
I/P 4
common
line
CN21
1
2
3
4
5
6
7
8
9
10
Hydro Unit sub PCB
common
line
I/P 3
I/P 2
I/P 1
I/P 8
I/P 7
I/P 6
I/P 5
Locally procured
Input items (Default setting)
I/P 1 Room thermostat input for heating
I/P 2 Room thermostat input for cooling
I/P 3 Hot water tank thermostat input
I/P 4 Heating/cooling mode switching input
I/P 5 Heating/cooling operation ON/OFF
I/P 6 Hot water operation ON/OFF
I/P 7 (DN_B6) 0: Emergency shutdown input
I/P 8 (DN_B6) 0: None
0: The terminals are opened, 1: The terminals are closed
I/P 4 I/P 5 Control
0 0 Heating mode OFF
0 1 Heating mode ON
1 0 Cooling mode OFF
1 1 Cooling mode ON
DN Setting item Default Setting value
61 Input signal setting when using I/P5, 6 (CN21) 0: Statics input 1: Pulse input
52 Input signal setting when using I/P7 (CN21) 0: Stop as I/P7 is closed 1: Stop as I/P7 is opened
B6 Setting the objects to control of I/P7, 8
0: I/P7 ··· Emergency Shutdown input
I/P8 ··· None
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