Goetze 9000 Manual De Instrucciones página 15

7
Cause of malfunction and remedy
► Back pressure increases above the setpoint - valve insert is contaminated
or damaged
Remedy: Clean or replace the valve insert.
On water heating systems in accordance with DIN 1988 and DIN 4753, the non-return
valve installed between the pressure reducer and water heater can leak. If this occurs,
the pressure gauge can indicate a rising back pressure when the boiler heats up its
expansion water, despite the pressure reducer working correctly.
Remedy: Replace the non-return valve.
► The pressure on the adjusting scale and pressure gauge do not match
If the scale ring is dismounted from the adjustment knob, the exact positioning of
both parts is released.
Remedy: To reassemble, equalise the scale ring to the current pressure, position
and mount. (Fig. d)
► Water escapes from the spring hood
If water escapes from the spring hood, either the spring hood is not correctly
mounted or the diaphragm is damaged.
Remedy: Tighten the spring hood or replace the valve insert.
► Low water pressure
If the installation is correct but a low water pressure prevails on the outlet side,
a clogged screen could be the cause.
Remedy: Clean or replace the screen.
Assembly and maintenance instructions - 9000 / 9040 www.goetze-armaturen.de