Prochem Legend SE AD - Manual (Page 41)

MAINTENANCE
LEGEND SE 980059 07/23/02
4-9
BYPASS MANIFOLD
Clean the bypass strainer and orifice using the
following guidelines:
1. Remove the strainer. Clean and re-install. DO
NOT over-tighten strainer.
2. Remove the cap. Remove the orifice, using a
3/16" Allen wrench (the 3/16" Allen wrench is
provided with Part #66-945280, the bypass
maintenance kit.)
3. Re-install the cap and run the unit with the
water pump ON for 15 seconds to flush out the
bypass manifold.
4. Remove the cap and re-install the cleaned
orifice, using the 3/16" Allen wrench. Tighten
orifice just enough to seat. DO NOT over
tighten. Re-install cap. DO NOT over-tighten
cap.
NOTE: If o-ring seals leak, replace them. If
strainer is damaged, replace strainer.
CHECK VALVE (SOLUTION OUTLET)
Inspect the check valve whenever doing service
on the chemical pump or if flow problems occur
in the chemical system:
1. Remove the check valve. Be sure the small o-
ring for the seat comes out with the check valve.
2. Remove the seat, using a 5/16" Allen wrench.
3. Check the Teflon seat for debris or wear. Clean
or replace Teflon seat if needed.
4. Clean the poppet and spring, inspect for wear or
damage, and replace as needed.
5. Re-assemble the check valve. Start the seat by
hand, tighten using a 5/16" Allen wrench. DO
NOT over-tighten seat.
NOTE: Improper seating of the check valve
poppet, damaged spring or o-rings will cause
poor operation of the chemical system.
6. Lubricate the o-rings with o-ring lubricant, Part
#05-008035, and reinstall.
(use 5/16 Allen
wrench to remove)
O-RING
SEAT
TEFLON SEAT
SPRING
O-RING
CHECK
VALVE CAP
POPPET
Tight wrap
on spring
CHECK VALVE DETAIL STRAINER
BYPASS MANIFOLD DETAIL
O-RING
CAP O-RING
ORIFICE
MANIFOLD