2 2 2
6
7
8
3
4
5
25
38
5.11 WIRING DIAGRAM TWO HEATING ZONES DIRECT + MIXED AND DHW PUMP
Key:
A37 - Connection sheet (loads)
A38 - Connection card (signals)
B1-2 - System ow probe (NTC) (optional)
B2 - Domestic hot water probe (NTC) (optional)
B3 - Low temperature ow sensor (NTC) (optional)
B4 - External probe (NTC) (optional)
H1 - “ERROR" warning light (230 Vac) (optional)
H2 - “Burner on” indicator light (230 Vac) (optional)
M3 - DHW pump (optional)
M10-1 - Zone 1 pump (optional)
M10-2 - Zone 2 circulator pump (optional)
M31-2 - Zone 2 mixing valve (Optional)
S20-1 - Zone 1 room thermostat (optional)
S20-2 - Zone 2 room thermostat (optional)
1 - 230 Vac - 50 Hz
2 - External relay (optional) - Coil 230 Vac Max. 0.1 A
3 - Close
4 - Open
5 - Common
6 - Master appliance
7 - Slave appliance (last boiler)
8 - Simple cascade appliance communication BUS
(make connections as per specic diagram)
“HYDRAULIC SETTINGS” PARAMETER CONFIGURATION TABLE ('TECHNICIAN' MENU)
Parameter/menu name Setting
“Relay settings” submenu:
- K70-A1
- K70-A2
- K70-A3
- K70-A4
- K70-A5
- K70-A6
- K70-A7
System pump conguration
- Zone 1 pump
- Zone 2 pump
- Domestic hot water pump:
- Mixing valve: closes
- Mixing valve: opens
- Burner on
- Error
- not used
- System sensor Heating + domestic hot water mode
“Mixed zone" submenu:
- Mixed zone selection
- Valve time
- 2
- 150
- Type of heating request
- DHW request type
- Parallel mode
- Climatic curve outside temperature and room thermostat
- Sensor
- Disabled
Openerm:
• If an OpenTherm thermostat is used, set the
parameter 'Heating request type' as 'Room
thermostat setpoint';
• Make sure that the OpenTherm thermostat is
compatible with the appliance.
Notes:
See further tables and notes pertaining to this
scheme in section 5.10, "Tables and notes common
to simple cascade wiring diagrams".