4.5 PUMP UNIT
Pump:
Wilo MTSL 15/5 HE-2 (till 27/08/2008)
Wilo INMTSL 15/5 HE-2 (from 28/08/2008)
The P.C.B. controls modulation of the circulation pump at two different speeds V2 (55w) and V3 (80w).
On “sanitary” the pump always works on V.3 to allow excellent heat exchange
On “heating” the circulating device has 2 speeds that are operated by the heating del-ret ΔT control.
Operated as follows:
ΔTdel-ret < ΔT – 2°C → V2;
ΔTdel-ret > ΔT → V3;
where: ΔT= 20°C (default value, which can be set by parameter 2 39 between 10 and 30°C).
Speed switching is performed with a 5 minute delay (value that cannot be set) up or down.
It is possible to exclude the pump modulation with the parameter 2 38:
- 00: speed 2 fix;
- 01: speed 3 fix;
- 02: modulating.
The anti-sticking system enables the circulating device and the 3-way valve for 15 sec. every 21 hours
from the last operation.
To Next Page
Loading...
