Servicing The Internal Float Drain Valve (If Equipped) - Sigma HRD Serie Manual De Instrucciones

Figure 8
6. Remove the used element cartridges. Discard the
element in accordance with applicable regula-
tions. Used elements typically hold contaminants,
such as compressor lubricants and particulate mat-
ter.
7. Insert new element cartridges in filter.
8. Replace the element retainer plate.
9. Replace filter top.
10. Reinstall bolts to secure filter top.
11. Reattach drain lines (if applicable).
12. Record the date of the ele-
ment change in a record
book or on the provided
"Maintenance Reminder"
label. A new element
change label with the up-
dated information should be
applied over the previous
label each time the element
is replaced.
Restart the dryer according to the start-up instructions
on page 1-9.
1-16
Filter
Servicing The Internal Float Drain Valve (If
Equipped)
DANGER
Vent internal pressure to atmospheric
pressure before performing any maintenance.
1. Vent internal pressure to the atmosphere. Refer to
Shutdown instructions on page 1-12.
2. Disconnect drain lines and automatic drain valves
(if installed).
DANGER
A "hissing" sound while the bowl is being
removed indicates the filter has not been
properly depressurized. DO NOT continue to
remove the bowl until the filter has been
completely vented to atmospheric pressure.
CAUTION
Filter bowls may be heavy. Take caution when
removing the bowl.
3. Remove the bottom bowl by unscrewing it from
the head. A strap wrench may be needed.
4. Remove the nut from the bottom of the bowl.
5. Turn the bowl upside down. The float drain will
fall out.
6. Inspect the drain for damage. Replace if necessary
or clean with a mild soap and water. Do not use
solvents to clean the drain valve as they may dam-
age the valve.
7. Hold the bowl upright and drop in the new or
cleaned drain so that the drain stem is through the
hole at the bottom of the filter.
8. Replace the nut and hand tighten.
CAUTION
Do not use a pipe wrench to tighten the filter
bowl to the head.
9. Reattach bowl to head and hand tighten.
10. Reattach the drain line (if applicable).
Restart the dryer according to the start-up instructions
on page 1-9.
HRD and HRD-EM Series (Bulletin 378)