Siemens Albatros2 AVS37 User Manual download pdf (Page 103)

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Siemens Schweiz AG User Manual CE1U2354en

HVAC Products Solar 23. August 2007

DHW storage tank

During solar charging, preference is given to the DHW storage tank. At every level A, B

or C (see below), it is charged with priority. Only then will the other consumers of the

same level be charged. As soon as all setpoints of a level are attained, those of the

next level are approached, whereby priority is again given to the DHW storage tank.

Buffer storage tank

During solar charging, preference is given to the buffer storage tank. At every level A, B

or C (see below), it is charged with priority. Only then will the other consumers of the

same level be charged. As soon as all setpoints of a level are attained, those of the

next level are approached, whereby priority is again given to the buffer storage tank.

Storage tank setpoints:

Level DHW storage tank Buffer storage tank

Swimming pool

(1)

A 1610 Nominal setpoint Buffer setpoint (slave pointer)

2055 Setpoint solar heating

B 5050 Charging temp max 4750 Charging temp max

2055 Setpoint solar heating

C 5051 Storage tank temp

max

4751 Storage tank temp max

2070 Swimming pool temp

max

(1)

When priority for the swimming pool is activated (operating line 2065), the swimming

pool is charged before the storage tanks.

If the preferred storage tank cannot be charged in accordance with charging control,

priority is transferred to the next storage tank or the swimming pool for the period of

time set (e.g. too great temperature differential between collector and storage tank).

As soon as the preferred storage tank (according to setting "Charging priority storage

tank") is again ready to be charged, the transfer of priority will immediately be stopped.

If this parameter is disabled (---) charging proceeds in accordance with the "Charging

prio storage tank" settings.

During the period of time set, the transfer of priority will be delayed. This prevents

relative priority from intervening too frequently.

If solar output is sufficient and solar charging pumps are used, parallel operation is

possible. In that case, the storage tank of the priority model can be the next to be

simultaneously charged, in addition to the storage tank to be charged next. Parallel

operation can be delayed by introducing a waiting time. This way, in the case of parallel

operation, switching on of the storage tanks can be effected in steps.

The setting (---) disables parallel operation.

To remove any existing cold water in the primary circuit, operation of the secondary

pump of the external heat exchanger secondary pump can be delayed.

Start function

Line no. Operating line

3831 Min run time collector pump

3834 Collector start funct gradient

The collector pump remains on for at least the preset minimum run time.

When the temperature at the collector sensor rises, the collector pump is activated.

Charging time relative prio

Waiting time relative prio

Waiting time parallel op

Delay secondary pump

Min run time collector

pump

Collector start funct

gradient

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Siemens Albatros2 AVS37 User Manual Page 103

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