Toshiba ESTIA HWS-802XWHM3-E Manuel D'installation page 28

Hydro Unit
Hot water cylinder electrical box connections
▼ Fig. 7-31
Additional hydro unit outputs
Alarm and Boiler Outputs
Alarm Output: L1: Alarm output
• Output enabled when the system is in alarm/fault condition.
• Volt free contact - specification shown below:
AC230 V; 0.5 A (maximum)
DC24 V; 1 A (maximum)
• Connection details: Terminals 1 and 2 (OPERATION) on MCC-1217 TB (Refer to "Fig. 7-32")
Boiler Control Output: L2: Boiler drive permission output
• Output enabled when outdoor ambient temperature <-10°C
• Volt free contact - specification shown below:
AC230 V; 0.5 A (maximum)
DC24 V; 1 A (maximum)
• Connection details: Terminals 3 and 4 (EMG) on MCC-1217 TB (Refer to "Fig. 7-32")
▼ Fig. 7-32
Hydro unit main
control board
27-EN
Display
Relay
K1
Connection
Cable
CN208 PJ20
Hydro unit
TCB-PCIN3E
4
3
EMG
OPERATION
2
Display
Relay
1
K2
– 28 –
Installation Manual
Local Supply
Power Supply
L2
Power Supply
L1
BOILER
CONTROL
OUTPUT
ALARM
OUTPUT