PFT G4 - Check the set values of the pressure switch

Mixing Pump PFT G4
Maintenance
66 2007-09-05
Pos: 8.25 /KN2006-Pr ojekte/Knauf/W artung/Mischpumpe PF T G4/1.1.1 Einstellwerte Dr uckschalter prüfen @ 36\mod_1177347068497_ 293361.doc @ 446072
8.4.4 Check the set values of the pressure switch
Fig. 66: Position of the pressure switches
 To be performed by a service technician.
If problems occur at an increasing rate the pressure switch should
be readjusted.
1 Pressure switch – water
2 Pressure switch – air
Pressure switch air and water
Fig. 67: Adjusting the pressure switch
Switch on the
machine
(Fig. 67/1, red)
Switch off the
machine
(Fig. 67/2, green)
Water 2.2 bar
(31.9 psi)
1.9 bar
(27.6 psi)
Air 1.5 bar
(21.8 psi)
1.9 bar
(27.6 psi)
Pressure switch - compressor
Fig. 68: Adjusting the pressure switch
Switching on the
compressor
(Fig. 68/1)
Switching off the
compressor
(Fig. 68/2)
Compressor 2.5 bar
(36.3 psi)
3.1 bar
(45 psi)
Safety valve - compressor
Fig. 69: Safety valve (1)
 Check to ensure that the safety valve (Fig. 69/arrow) opens at
4.0 bar (58 psi) against a completely closed air line.
Pos: 8.26 /KN2006-SM/nL.......... Seitenumbruch .......... @ 8\mod_1141998334703_0.doc @ 293764