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 |