Heating Control with or without Flow Temperature Sensor

The heating control loop can be operated with or without a flow temperature sensor.


Heating Pre-Control with Flow Temperature Sensor

Active freeze protection can override the following description:

Depending on the P-band (FLTC-01), the integral and the differential times (FLTC-02 and FLTC-03), the heating valve will be modulated as function of the flow temperature control deviation.

The room controllers will be stopped through the communication signal "HVAC mode" transmitted via a communication signal to the room controllers.

The heating control will:


Heating Pre-Control without flow temperature sensor

Active freeze protection can override the following description:

Without a flow sensor, the valve will open 100% and the pump starts when the maximum heating valve position input “MaxHtgVlvPos” or the thermal load input “TherminalLoad” > 8%.

The heating control will:

Table 5.   Pre-Control Parameter List

Description

Value Range

Default Value

Unit

FLT-01: maximum flow temperature limit pre-heating

0 ... 150

82

°C

FLTC-01: P-band heating pre-control

1 ... 1000

100

K

FLTC-02: I-time heating pre-control

0 ... 3600

24

sec

FLTC-03: D-time heating pre-control

0 ... 1000

0

sec

FLTC-04: heating control switch on delay

0 ... 3600

30

sec

HPMP-01: switch on delay heating pump

0 ... 600

0

sec

HPMP-02: switch off delay heating pump

0 ... 3600

300

sec