Maintenance instructions
Page
81
of 82
System type
Water monitoring system
MI6200-0010
Task:
Safety valve function test
Task description:
This instruction describes how to test the safety valve. The safety valve
may only be tested by a trained technician.
Difficulty 1-5
Overhaul interval
Estimated time consumption
Every 6 months
2 min.
Spare Parts
Tools
Part no:
Description:
Item:
02687
Safety valve
1 x 13mm Spanner
Procedure
ATTENTION:
Do not change the opening pressure setting on the safety
valve. The safety valve pressure must be set to 3.0 bar. A
higher opening pressure could result in system damage.
1. The function test of the safety valve is executed by adjusting the
pressure in the system by means of the pressure reduction valve.
2. Remove protective black plastic cap on the pressure reduction
valve.
3. Unscrew locking nut
4. Turn the pressure adjusting screw counter-clockwise to increase
the pressure in the system. If the safety valve is working properly,
the pressure should not be able to increase to more than 3.0 bar,
which is the pressure holding/safety valve opening pressure.
5. If the pressure does not increase to more than 3.0 bar, the test is
done, and the pressure reduction valve can be lowered to 1.5 bar.
6. If the pressure in the system rises above 3.0 bar, the valve is not
working properly.
Solution:
Readjust the opening pressure on the
safety valve by turning the adjusting screw counter-clockwise until
the valve opens at 3.0 bar. Same procedure as with the pressure
reduction valve.
7. If the solution doesn't work, the valve should be replaced.
Photos
MI6200-0010
