6.11.3 Circulating Pump; 6.11.4 Short Circuit Pump; 6.11.5 Valve Pump; Pulser Knob Sensitivity - Tech Controllers EU-801 PID User Manual

6.11.2.2 MAXIMUM TEMPERATURE
This parameter define the temperature at which the pump will be disabled.
6.11.2.3 SENSOR SELECTION
It allows the user to decide which sensor should provide data for activation of the additional pump: CH sensor, DHW sensor,
valve 1 sensor, return sensor, weather sensor, buffer sensor top, buffer sensor bottom.

6.11.3 CIRCULATING PUMP

When this function is active, the additional pump serves as the circulating pump. The pump controls the valve which mixes the
hot water between the CH boiler and the DHW receivers. The following parameters need to be configured for the circulating
pump to work correctly:
6.11.3.1 OPERATION TIME
This parameter is used to define the operation time of the pump.
6.11.3.2 PAUSE TIME
This parameter defines the frequency at which the circulating pump is enabled during its activity. It is the period time when the
pump remains inactive.
6.11.3.3 OPERATION SCHEDULE
The user may program a daily schedule of pump operation and inactivity.

6.11.4 SHORT CIRCUIT PUMP

This option enables the user to select the operation mode of the pump. The pump will be activated above the threshold (the
pump will switch on above the pre-set activation temperature). If the pump is to be activated above the threshold, the
temperature of the pump activation threshold should also be set (temperature measured by the CH sensor).

6.11.5 VALVE PUMP

When this option has been selected, the additional device will serve as a valve pump. Its task is to mix hot water between the CH
boiler and the heating circuit.
6.12 P
ULSER KNOB SENSITIVITY
This function is used to adjust the sensitivity of the pulser knob within the range of 1-3 (1 is the highest sensitivity).
6.13 E
XTERNAL SENSOR CALIBRATION
External sensor correction should be performed during installation or after a longer period of using the regulator when the
temperature measured by the sensor is different from actual temperature. Range of regulation is -5ºC to +5 ºC with the accuracy
of 0,1ºC.
6.14 W
ATER TANK DISINFECTION
Thermal disinfection involves raising the temperature of water in the DHW circuit to the minimum of 60 °C (required disinfection
temperature). Current regulations require adjusting the DHW installation to enable thermal disinfection carried out in the
temperature of at least 60°C (recommended temperature: 70°C). Piping, fittings and technological design of the DHW system
need to meet this requirement.
DHW disinfection aims to eradicate Legionella pneumophila – bacteria which lower the cell-mediated immunity. The bacteria
often multiplies in hot water reservoirs (optimum temperature: 35°C), which often happens in water tanks.
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