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Captions:
Installation and operating instructionsWilo domestic water systems Hxx
Fig. 1
Structure
1
Pump
2
Filling screw
3
Drainage screw
4
Diaphragm pressure vessel
5
Pressure gauge
6
Mains cable with plug (EM only)
7
Pressure switch
8
Flexible pressure hose
9
Gas filling valve
L2/P1
Spacings between fastening holes
Fig. 2
Inlet mode
A
Intake from tank
B
Intake from water supply system
10
Spring-mounted foot valve
11
Check valve on intake/suction side
12
Check valve on the pressure side
13
Non-return valve
14
Pipe attachment
Fig. 3
Suction mode
10
Foot valve
12
Check valve on the pressure side
14
Pipe attachment
Fig. 4a
Pressure switch EM (type PM)
and 4b
1
Adjusting screw for switch-off pressure
2
Adjusting screw for pressure difference
(switch-off pressure – switch-on pressure)
3
Supply line/connections motor
4
Supply line/connections system
5
Connections earthing (PE)
Fig. 5a
Pressure switch DM (type PT)
and 5b
1
Adjusting screw for switch-off pressure
2
Adjusting screw for pressure difference
(switch-off pressure – switch-on pressure)
3
Supply lines/connections motor
4
Supply lines/connections system
5
Connections earthing (PE)
Fig. 6a
Pressure switch diagrams
and 6b
Fig. 6a
Pressure switch (type PM5/PT5)
Fig. 6b Pressure switch (type PM12/PT12)
po
Switch-off pressure
[bar]
pi
Start-up pressure
[bar]
20
Figs. 7
Checking gas preliminary pressure diaphragm
a to 7c
pressure vessel
Fig. 7a
Depressurise domestic water system
Fig. 7b Remove valve flap
Fig. 7c
Measure gas preliminary pressure
Fig. 8
Version EM connection diagram for optional
float switch
1
Motor terminal box
2
Pressure switch
3
Optional float switch
4
Additional connection terminals
WILO SE 11/2010