Watts LF909 Pequeno Serie Manual De Instalación página 6

Servicing the Relief Valve
NOTICE
The spring tension in the relief valve assembly is contained in the
design of the relief valve; therefore, the relief can be removed in a
one-piece spool-type assembly.
1. Detach the activation module, if installed, from the flood sensor
then remove the sensor from the relief valve.
2. Remove the four bolts that hold the relief valve cover in place.
3. Remove the cover. The stainless steel adapter (or piston) with
O-ring attached is also removed with the cover.
4. Pull out the relief valve assembly.
5. Clean the relief valve seat and disc without disassembling the
relief valve assembly. If the relief valve diaphragm, the disc, or
both need replacement, disassemble the relief valve module.
No special tools are required.
Reassembling the Relief Valve
Much care is required to put the relief valve assembly back together. Follow the instructions closely to prevent any damage to the stem.
CAUTION
!
If the relief valve cover does not press against the body, the assembly is crooked. Tightening the bolts in this instance causes the stem to
bend. Do not force the cover into place; misalignment causes damage.
Figure 1
Have a screwdriver handy to reassemble
the relief valve assembly.
6
⁄ " – 1"
3
4
1 ⁄ " – 2"
1
4
Figure 2
Depress the assembly, carefully guiding
it against the 2 pound spring load. When
properly aligned, the piston is in the
cylinder bore. Insert the screwdriver along
the right channel wall, positioning the
screwdriver tip to the left of the relief valve
O-rings to hold the assembly in place.
Piston
Piston
O-ring
Cover
Diaphragm
RV O-Ring
Disc Assembly
(2) Piston
Cover
O-rings
Piston
Diaphragm
Disc Assembly
Figure 3
Let go of the screwdriver and use both
hands to reattach the cover. Insert two
bolts 180 degrees apart and fasten to
hold the cover in place. Insert the two
remaining bolts and fasten by alternating
one to the other until the cover is secure.
Remove the screwdriver. Reattach the
flood sensor to the relief valve and mount
the activation module to the sensor.
Relief Valve
Assembly
Seat
Stem
Seat
O-ring
Body
Relief Valve
Assembly
Seat
O-ring
Stem
Seat
(2) RV O-Rings