Bulex Thema Condens AS 48-A, Руководство пользователя, Страница: 82 / 199

MAKSİCONDENSE 48-65
Notes
01/2018 76 Training 0020260859_00
3.3.5.2 New! Control function of the remaining pump head, temperature target value limita-
tion
Modulation limitation max.
°C
1. Zone: No circulation water volume (OFR). Max. Temperature target value not enabled as the
minimum volume flow of 125 l/hr per heat exchanger coil is not fulfilled. The burner therefore
remains locked and the unit start is blocked.
2. Zone: Low circulation water volume (LFR). The max. Temperature target value is enabled for a
flow temperature of max. 65
°C
. This corresponds to a volume flow of 125 l/hr to 350 l/hr per
heat exchanger coil. The burner is therefore enabled and the boiler starts and modulates within
the temperature limitation of
65
°C
.
3. Zone: High circulation water volume (HFR). The temperature target value is enabled for a max.
Temperature of max. 85
°C
. That corresponds to a volume flow > 350 l/hr per heat exchanger
coil. The burner now operates without a special temperature limitation.
With the control functions, SDBG can ensure a continuous operation of the unit
without operating blocks while supplying heat.
Furthermore, the number of switching cycles during operation is minimised (preven-
tive maintenance).
No flow rate/no igni-
tion 35
–65 kW
Low flow rate 35
–65 kW
(LFR)
High flow rate 35
–65 kW
(HFR)
Volume flow per heat exchanger coil and temperature difference limitation
Te
mpe
ra
tu
re
[
°C
]
Volume flow per coil [l/hr]
Temperature difference 35–65 kW
Boiling range