Siemens Albatros2 AVS37 User Manual download pdf (Page 164)

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Siemens Switzerland Basic units RVS61.843 and RVS41.813 CE1U2355en_02

HVAC Products Contents 3. Juli 2008

Function input

(5950, 6046,

5960)

Function

output QX..

State Hx Release status of source

x No heating

Swi’pool “Not"

pump Hx

No direct heating (Hx acts on

solar function)

Swi’pool

Pump Hx

Inactive Locked

Swi’pool

Pump Hx

Active Released

- = release of swimming pool not set

x = not relevant

Switch-on command HP stage 1 (heating only)

By closing a contact connected to this input (e.g. by an external controller or a

superposed building automation and control system), stage 1 of the heat pump is put

into operation. It remains in operation until contact Hx opens again or until the heat

pump is shut down by a safety function (e.g. due to high-pressure, low-pressure, or hot-

gas temperature).

Internal requests, DHW requests and requests via bus are suppressed. No

consideration is given to minimum off time and minimum running time. The prerun and

overrun times of the condenser pump and source pump are taken into account. Normal

defrost is possible.

Switch-on command HP stage 2 (heating only)

By closing a contact connected to this input (e.g. by an external controller or a

superposed building automation and control system), stage 2 of the heat pump is put

into operation. It remains in operation until contact Hx opens again or until the heat

pump is shut down by a safety function (e.g. due to high-pressure, low-pressure, or hot-

gas temperature).

Internal requests, DHW requests and requests via bus are suppressed. No

consideration is given to minimum off time and minimum running time. The prerun and

overrun times of the condenser pump and source pump are taken into account. Normal

defrost is possible.

NC contact

The contact is normally closed and must be opened to activate the selected Hx

function.

NO contact

The contact is normally open and must be closed to activate the selected function Hx.

The descriptions given on the functions of contact Hx refer to the setting as NO contact.

If input H1, H2, H3 (5950, 6046, 5960) is used as a contact input (”Min flow temp setp”

or “Refrigeration request”), the controller uses the value set here as the setpoint.

The heat pump is controlled constantly at the temperature level set here, either until

contact Hx opens again or until a higher heating / cooling request is delivered.

If several requests for heating or cooling are received at the same time (contact Hx,

DHW or from the controller itself), the highest or lowest of them is automatically

selected.

Example of minimum flow temperature setpoint:

Type of contact Hx

Function value contact Hx

1 2 ... 159 160 161 162 163 164 165 166 167 168 169 ... 234 235

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Siemens Albatros2 AVS37 User Manual Page 164

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