From Heatweb Wiki
Range of BoilerMaster HF (High-Flow) HIUs.
- Single plate up to 270kW Central Heating
- 3°C approach and 25C drop on secondaries 83°C : 55->80°C
- EPP Casing 665mm x 665mm
- Wall or frame mounted
- Pipework connections up to 54mm copper
- Electronic control system
- Web server interface
- Pressure independent primary flow control up to 12.5 m3/hour (208 litres/minute)
- Primary Flow In
- Primary Return Out
- Secondary Return In
- Secondary Flow Out
- Optional expansion relief
- 230vac 6A supply
- 10A 230vac Volt free auxiliary output relay (x2) can be used for pump and error
- Option for hard wired remote enable
- Tracks primary temperatures to target 3.5°C lower setpoint on secondary
- Return temperature limit
- Remote on/off
Additional relays can be added into system up to a limit of 4.
Where additional relays are required a dedicated relay interface can be provided offering up to 12 volt free or solid state relays.