13
MAINTENANCE
Warning! Before operating on a unit, ensure that electrical supply of
the control box is OFF.
Only authorized people should work on the unit
The Cetetherm pressurization units require little maintenance. For that, you just have to check:
•
The filter(s) is(are) clean,
•
The overflow valve(s) operate correctly,
•
The expansion vessel should be inflated 0.1 bar less than the pressure set point,
•
There is no leakage and the unit is clean,
•
The different settings and security functions,
•
The pump(s) do(es) not require any particular maintenance.
Cut off the electrical supply before working on it
SETTING EXAMPLE
An 8th floor apartment. That means 8+1(Level 0)+1 (underground)=10 levels of about 3 meters each.
The static height is 3*10=3 bar (1 meter=0.1 bar).
The different parameters should be as follows:
Parameter
MP195NL
/MP4N
MP5N/
MP7N
Parameter
MP195NL/
MP4N
MP5N/
MP7N
Setpoint P(bar)
3.2
3.2
.t1 (sec.)
6
6
Hysteresis (bar)
0.5
0.5
.t2 (sec.)
-
1
Threshold gar (bar)
-
0.2
.t3 (sec.)
1
1
High pressure (bar)
4.2
4.2
.t4 (sec.)
6
6
Low pressure (bar)
2.8
2.8
.t5 (sec.)
1
1
With
.t1= Temporisation after lack of water default
.t2= Cascade temporisation
.t3= Pump(s) stop temporisation
.t4= Filling temporisation
.t5= Low pressure temporisation.
Overflow valve(s) set 0.2 bar more than (SHysteresis)
