1. General
A low-load control unit is incorporated as standard in everyLoos Switchgear System for oil, gas or dual fuel boilers with 2-step, 3-step or continuously variable control.This control unit prevents unnecessary energy losses as well as alternating temperature stresses of the boiler.
2. Principle of operation
When the boiler is started up, switching to burner step 2 (3) Rotary knob (1) or to continuous burner control is prevented for a preset time of up to 5 minutes. After each control shutdown
and subsequent restart of the burner, this circuit functions analogously. The burner will therefore not perform uncontrolled ON/OFF switching with moderate steamr hot water requirement.
This results in lower pre-ventilation losses as well as reducing thermal stress on the boiler walls, particularly on the firing side.
3. Setting
The timer can be set as required to between 0 - 5 minutes (each scale division corresponds to 0.5 minutes). When putting the system into operation, it is recommended to set the rotary knob to scale value 3 (1.5 minutes delay). This value can be successively increased if no difficulties are encountered during operation as a result of an excessive pressure drop after normal shutdown. If, after a normal shutdown, the pressure in the consumers drops excessively, the setting of the rotary knob (1) must be reduced in small steps by turning it anticlockwise. The longer the delay time, the less energy consumption and the less boiler wear firing operation will entail. The luminous indicator N (green) indicates when voltage is applied to the time-lag relay. The luminous indicator R (red) light up when the delay time has elapsed.
4. Malfunctions
Pressure/temperature drop after control shutdown on the consumer too high:
Cause: Time-lag relay set to too long a delay.
Remedy: Reduce the rotary knob's setting in small steps by turning is anticlockwise.
A low-load control unit is incorporated as standard in everyLoos Switchgear System for oil, gas or dual fuel boilers with 2-step, 3-step or continuously variable control.This control unit prevents unnecessary energy losses as well as alternating temperature stresses of the boiler.
2. Principle of operation
When the boiler is started up, switching to burner step 2 (3) Rotary knob (1) or to continuous burner control is prevented for a preset time of up to 5 minutes. After each control shutdown
and subsequent restart of the burner, this circuit functions analogously. The burner will therefore not perform uncontrolled ON/OFF switching with moderate steamr hot water requirement.
This results in lower pre-ventilation losses as well as reducing thermal stress on the boiler walls, particularly on the firing side.
3. Setting
The timer can be set as required to between 0 - 5 minutes (each scale division corresponds to 0.5 minutes). When putting the system into operation, it is recommended to set the rotary knob to scale value 3 (1.5 minutes delay). This value can be successively increased if no difficulties are encountered during operation as a result of an excessive pressure drop after normal shutdown. If, after a normal shutdown, the pressure in the consumers drops excessively, the setting of the rotary knob (1) must be reduced in small steps by turning it anticlockwise. The longer the delay time, the less energy consumption and the less boiler wear firing operation will entail. The luminous indicator N (green) indicates when voltage is applied to the time-lag relay. The luminous indicator R (red) light up when the delay time has elapsed.
4. Malfunctions
Pressure/temperature drop after control shutdown on the consumer too high:
Cause: Time-lag relay set to too long a delay.
Remedy: Reduce the rotary knob's setting in small steps by turning is anticlockwise.
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