–91–
7. HYDRO UNIT INSTALLATION MANUAL
Engineering Data Book
CAUTION
• Be sure to prepare a non-voltage contact for each terminal.
• Display Relay capacity of “EMG” and “OPERATION”.
Below AC230 V 0.5 A (COS
Ø = 100 %)
When connecting loads such as relay coil to “L1, L2” load, insert noise surge absorber.
Below DC24 V 1 A (Non-inductive load)
When connecting load such as relay coil to “L1, L2” load, insert the bypass circuit.
Optional inputs to hydro unit
Room Thermostat Input:
2–3: Room thermostat input for cooling mode
1–3: Room thermostat input for heating mode
• Output enabled when either heating or cooling mode selected on room thermostat. (locally supplied)
• Volt free contacts
• Connection details:
Cooling Connection: Terminals 3 (COM) and 2 (COOL) on TCB-PCMO3E (Refer to “Fig. 7-34”)
Heating Connection: Terminals 3 (COM) and 1 (HEAT) on TCB-PCMO3E (Refer to “Fig. 7-34”)
CAUTION
• Be sure to prepare a non-voltage continuous contact for each terminal.
• Supplementary Insulation must be added to user touchable part of switches.
Cylinder Thermostat Input
S1: Cylinder thermostat input
• Non-voltage contacts
• Connection details:
Cylinder Thermostat: Terminals 3 (COM) and 2 (COOL) on TCB-PCMO3E (Refer to “Fig. 7-35”)
Emergency Shutdown input
S2: Emergency stop input
• Non-voltage contacts
• Connection details:
Emergency stop: Terminals 3 (COM) and 1 (HEAT) on TCB-PCMO3E (Refer to “Fig. 7-35”)
1
2
3
PJ17
CN211
TCB-PCMO3E
▼ Fig. 7-34
Connection
Cable
COM
Local supply thermostat
COOL
HEAT
Cool
Hot
1
2
3
S1
S2
PJ17
CN210
TCB-PCMO3E
▼ Fig. 7-35
Connection
Cable
COM
Local Supply
COOL
HEAT
29-EN
To Next Page
Loading...
