KEY RK-2006LSPz, Operation Manual

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5.7. Boiler work parameters.
Minimum boiler temperature - this parameter specifies boiler temperature when
the controller shall switch off central heating and domestic water pumps. It is the
lowest temperature setting of the boiler that can be programmed with thermostat’s
knob.
M I N I M U M B O I L E R
T E M P E R A T U R E 4 0 c
Maximum boiler temperature - this parameter specifies boiler max. programmed
temperature setting which can be programmed with thermostat’s knob. It is also
boiler temperature when central heating pump is engaged to provide protection for
the boiler against overheating.
M A X I M U M B O I L E R
T E M P E R A T U R E 9 0 c
Boiler upper hysteresis - if the controller works in burner minimum power mode,
and boiler temperature increase follows by this programmed setting, the controller
will start burner extinction(shut down).
B O I L E R U P P E R
H Y S T E R E S I S 5 c
Burner power switching hysteresis - when the programmed boiler water
temperature is obtained the controller is switched to minimum power work mode.
This parameter specifies required water temperature drop so that maximum power
work mode was activated. After switching to maximum power the fuel and air feeding
dose is determined according to burner power modulation.
B U R N E R P O W E R S W .
H Y S T E R E S I S 1 c
Boiler protection hysteresis - the controller provides for boiler minimum and
maximum temperature by providing control over operation of central heating and
domestic water pumps. This parameter specifies hysteresis parameter of boiler limit
temperatures switching off.
B O I L E R P R O T E C T .
H Y S T E R E S I S 2 c
Boiler overheating temperature - this parameter specifies boiler water temperature
when the controller switches off control and activates boiler overheating alarm.
B O I L E R O V E R H E A T
T E M P E R A T U R E 9 8 c