40
2.3 – HYDRAULIC CIRCUIT – MAIN COMPONENTS DESCRIPTION
2.3.1 WATER CIRCULATING PUMP
CONTENT Unit 095 125 155 157 175 177 195 197 257 307
Type
WILO – STRATOS PARA
Reference
25/1-7 25/1-8 25/1-12
Control
High Efficiency electronically commutated brushless motor – Control module integrated
Power supply
Vac 230 V / 1 / 50Hz
Protection class
IP 44
Insulation class
H
Protection
Full integrated motor protection
Power consumption W
4-38 8-140 16-310
Max head pressure
(*)
m
Max flow rate (*)
Pipe connection
Threaded – 1’’1/4 G
(*) See curves
Flow rate adjustment:
The heat pump is fitted with an high efficiency electronically controlled water circulating pump ensuring optimum efficiency
according to the different installations.
The adjustment is made using the red knob on the front
panel of the circulating pump.
It is advised to perform this adjustment according to
the “constant pressure control” model :
symbol
In this mode, the circulating pump electronic control
maintains the differential pressure produced by the
circulating pump at a constant level equal to the
setpoint pressure ∆P adusted with the red knob
(see characteristic curves below)
Note:
• For our applications, the adjustment according the “variable pressure control” (symbol )
is not recommended.
• Selection of the position “ext in” corresponds to an external control
which is not used on the heat pump. In this
condition, water pump operates at a minimum speed.
Setpoint adjustment ∆P
(manometric head pressure in m W)
Electronic
To Next Page
Loading...
