Evoqua WALLACE & TIERNAN S10k, Instruction Manual

Page: 61 / 104

S10k
Maintenance
6.
61
6.8.8 Antisyphon-injector W3T171368 (1")
The position numbers refer to the drawing W3T171368.
1 Put the chlorinator out of service, remove all the chlorine gas
out of the tubing.
2 Drain the operation water tubes.
3 Proceed with actions described in 6.8.7 Injector W3T171367
up to 12. incl.
4 Screw out the clamping nut (17) with the parts connected.
5 Remove the valve stem (21), replace the O-ring (20).
6 Replace the valve stem (21) every 2 years.
7 Remove the securing clip (47).
8 Remove the clamping screw (17) and spring (43).
9 Remove the clamping disc (44) and replace O-ring (18)
10 Replace diaphragm assembly (41, 46, 40, 42, 45).
Assemble with clamping screw (17) and spring (43) and
secure with clip (47).
11 Remove plug (22), replace O-ring (8).
12 Press out valve seat (1) using a round rod, replace together
with O-ring (2).
Press in new seat with O-ring to the stop using a round rod or
plastic tube Ø16 mm with even front, pay attention that the
cone is on the side of plug (17).
13 Place the stem (21) into the valve stem guide (42) and screw
in the clamping screw (17) with assembled parts.
14 Screw in plug (22).
15 Replace the O-ring (27) in the gas inlet.
16 Screw in the tailway and connect to the operation water
tubing. Connect the gas line.
17 Check for tightness and function.