Siemens AVS75.39 Series User Manual page 164

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Siemens
Building Technologies
Circ'pump thermostat (Digital)
A thermostat can be connected instead of sensor B39.
Pulse counter (pulse input)
The basic unit provides two pulse inputs to interconnect externally installed
electricity meters, natural gas meters, heating meters or volume flow meters.
The count (electricity, natural gas, heat) used must be parameterized on the
application, i.e. in the Energy counter.
The counter value can be viewed on line 7842 (H1), 7856 (H3).
Parameter Contact type Hx is not relevant to pulse count.
Dewpoint detector (Digital)
To detect the formation of condensation in the cooling circuit, a dewpoint monitor
can be connected to input Hx.
If the dewpoint monitor trips, the cooling circuit is immediately switched off.
The cooling is enabled again when the dewpoint monitor reverts to normal and an
adjustable locking time (946) has elapsed.
Flow temp setp inc hygro (digital)
To prevent the formation of condensation due to high indoor air humidity, a
hygrostat can be connected to input Hx.
If the hygrostat trips, the flow temperature setpoint is increased by the fixed value
of "Flow temp setp incr hygro" (line 947). As soon as the hygrostat reverts to
normal, the flow temperature setpoint returns to the "normal value".
Boiler return thermostat (Digital)
A connect boiler return thermostat closes the contact and transmit in this manner to
the controller that the demanded return temperature was breeched. This starts up
the boiler bypass pump.
Operating message Sup'source (Digital)
Closing the contact signals the controller that the supplementary source
successfully started. See as well setting "Delay lockout position" (line 3755).
Charge priority DHW solid fuel (Digital)
The DHW storage tank is charged (after the buffer storage tank is first charged) by
closing the contract. The other consumers are only released after the DHW storage
tank achieves its setpoint.
Flow measurement Hz (frequency input)
The controller includes a frequency [Hz] as a signal for the measured flow.
The respective flow is calculated via the linear characteristic which is defined by 2
fixed points (input value 1 / input value 1 and input value 2 / function value 2).
The present flow can be viewed on the following operating lines per this setting:
line 8521 "Solar flow".
Setting unavailable with H2.
User manual RVS43.345
The settings in detail
CE1U2354en_021
2013-09-02