Hamworthy Sherborne Series, Installation, Commissioning And Servicing Instructions

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HAMWORTHY HEATING LTD
19
SHERBORNE 500001167/E
8.0 CONTROLS OPERATION
The control system is a self contained package which controls & monitors all safety & functional aspects of the
boiler performance & it’s integration with external system controls.
The system is compatible with BMS (or other) external controls via an enable 0~10V DC input signal. Operational
outside & mixed flow sensors are supplied by HHL to ensure safe & reliable operation.
The system provides 2 volt free contacts for external fault indication—Normal run & lockout.
The control system allows the connection of multiple boilers on an RS485 bus connection (twisted pair) to enable
cascade control of up to 12 multiple boilers by selection of Master/Slave configuration.
Note: To ensure safe & reliable operation, all wiring between sensors & master/slave boilers must be separated
from mains voltage wiring.
8.1 Fascia Details
8.2 Display Details
In it’s standard version the screen displays the boiler status (operating mode, time heating time program, boiler
temperature, presence of flame & possible fault)
The arrowheads on the left hand side indicate water pressure between 0-4bar or 0-10bar depending on the pres-
sure sensor used (if one is used)
Button Operation Function
Lockout reset Resetting the controls
Enable dhw mode Dhw on/off - not used
Heating circuit mode Selection of operating mode
Heating circuit temperature setpoint Adjustment of boiler or room temperature setpoint (not used)
Line selection (up/down) Selection of operating parameter
Adjustment of settings Adjustment of parameter settings
Information Select information display screens
Enable Maintenance Mode Switches to maintenance mode (press both buttons to select)