Valves & Filters Replacement; Decompressing Water And Air Pressures; Replacing The Whole Magnetic Valve/Pressure Regulator Assembly - Planmeca Compact I Technical Manual

Chapter G - PARTS REPLACEMENT & REPAIR
7 VALVES & FILTERS REPLACEMENT

7.1 Decompressing water and air pressures

a) Turn off the water supply line.
b) Decompress the water pressure with the syringe instrument.
c) Turn off the air supply line.
d) Decompress the air pressure with the syringe instrument.
e) Turn off the unit.
f) If necessary, loosen the two screws attaching the magnetic valve assembly to the cuspidor
support plate and remove the assembly to get more space to replace the valves.
7.2 Replacing the whole magnetic valve/pressure regulator
assembly
WARNING
Special care must be taken when disconnecting the water and air inlet tubes.
Ensure that the water and air supply lines are turned off.
NOTE Any splashed water must be carefully removed prior to unit turn-on.
a) Decompress the water and air pressures as described in section 7.1 "Decompressing water
and air pressures" on page G-36.
b) Loosen the two attachment screws (1) and lift off the magnetic valve/pressure regulator
assembly from the cuspidor plate (2).
c) Disconnect all the magnetic valve control cables that are connected to the valves.
d) Detach all the water and air tubes that are connected to the valves.
e) Install the new magnetic valve/pressure regulator assembly in reverse order.
f) Apply pressure to test that there are no air or water leaks.
G-36 Planmeca Compact i
VALVES & FILTERS REPLACEMENT
Technical Manual