Bulex Thema Condens AS 48-A, Manual, Page: 86 / 199

MAKSİCONDENSE 48-65
Notes
01/2018 80 Training 0020260859_00
3.3.5.5 New! Operating without a low loss header
Units with an output of 48
–65 kW are released for installation without a low loss header. In order to
implement this installation type, a low or high volume flow must be ensured. The function is enabled
under
the parameter setting
D.014 = 0
–5.
Here, too, the operating mode as described in sections 3.3.5.1 and 3.3.5.2 applies.
Volume flow 48 kW
Low volume flow (Low Flow Rate LFR) 500 l/hr
High volume flow (High Flow Rate HFR) 1400 l/hr
Volume flow 65 kW
Low volume flow (Low Flow Rate LFR) 675 l/hr
High volume flow (High Flow Rate HFR) 1900 l/hr
If the volume flow is below
500 l/hr (0 volume flow zone; OFR Zero Flow Rate), heating mode is not
possible. If there is a heat demand in this condition, the unit electronics check the current volume
flow with a pump start-up every
10 min in order to decide whether it is possible to start the heating
mode.
If the volume flow is > 500 l/hr and < 1400 l/hr for 48 kW (low volume flow zone; LFR Low Flow
Rate); > 675 l/hr and < 1900 l/hr for 65 kW, heating mode is possible with restricted output and flow
temperature.
- Max. Flow temperature limitation =
65
°C
- Max. Output limitation with delta T = max. 15
°K
This function limitation is intended to prevent steam hammers in the PWT.
If the volume flow is
> 1400 l/hr 48 kW (> 1900 l/h 65 kW ) (high volume flow zone; HFR High Flow
Rate), heating mode starts without limitation of the flow temperature and output.