Functions

ES 5941Z

Primary pump cycles

Heat source minimum temperature

TWWset reduces the current temperature at TPV or TO1 minus the

minimum temperature difference STE14 MIN TDIFF CHILLER. The fresh

water station then works at this reduced setpoint in order to reach

and maintain this value at the outlet on TWW. An active setpoint

reduction is indicated in the status of the fresh water station STA01

STATUS by means of an "8". If the setpoint reduction does not result

in a temperature drop on the primary side, further protective mecha-

nisms become active.

If the temperature on the primary side at TPV is lower than BAS15 MIN

TEMP HEAT SOURCE, the primary pump begins cycles. After a defined

switch-on time STE12 MIN.RUNTIME TPV PROTEC and the failure to

reach the minimum temperature at the TPV primary flow sensor, the

pump is blocked for a definable period of time STE13 MIN.OFFTIME TPV

PROTEC. This allows power to be supplied to the primary side once

again.

If the temperature in the tank (sensor TO1) is

< BAS15 MIN TEMP

HEAT SOURCE, the primary pump is switched off. The cancellation of

charging is indicated in the status of the fresh water station STA01

STATUS by means of "11". If there is no sensor installed in the tank,

sensor TPV serves as the reference instead of sensor TO1.

6.3

Circulation mode

Circulation mode

Continuously on

Temperature

The following modes can be selected under ZIR00 CIRCULATION MODE:

n 0: Off

n 1: Continuously ON and time program

n 2: Temperature and time program

n 3: Pulse switching and time program

The circulation pump is operated without interruption.

The circulation pump WWC can be operated in a temperature-con-

trolled manner. To this end, a minimum setpoint for the circulation

temperature [TBZ] is defined in the circulation return. SEK06 SETPOINT

CIRCULATION T = BAS01 DHW TEMP.SETPOINT - ZIR01 TEMP. REDUCE

TSET CIRC.

03/2024 Item no. 215790 EA no. 1321

37

n

n

WWC blocked if [TBZ]

> SEK06 SETPOINT CIRCULATION T

WWC is active if [TBZ]

<SEK06 SETPOINT CIRCULATION T - ZIR14

SWITCH ON CIRCULATION

With regard to thermal disinfection, the thermal dis-

infection setpoint temperature LEG01 TEMP TERM.

DISINFECTION applies as the heat source minimum

temperature.