Evoqua WALLACE & TIERNAN S10k, Instruction Manual

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58
WT.025.200.000.DE.IM 0517
Maintenance
S10k
6.
6.8.5 Injector W3T171369 (3/4")
The position numbers refer to the drawing W3T171369.
1 Put the chlorinator out of service, remove all the chlorine gas
out of the tubing.
2 Drain the operation water tubes.
3 Remove gas tubes from the injector. Remove operation water
tubes as far as necessary for removing tailway and nozzle
from the injector.
4 Screw out tailway and nozzle.
5 Replace O-rings.
6 Screw out inlet screw (1), remove valve stem (4), replace O-
ring (3) and spring (12).
Every two years replace the valve stem (4)
7 Unscrew union nut (15), if necessary use a strap wrench.
On this injector the thread of the union nut and the correspon-
ding thread on the body must not be greased. Remove exis-
ting grease with alcohol.
8 Remove upper body (5).
9 Replace valve stem with ball head (13). Pay attention not to
damage the ball head!
10 Remove diaphragm assembly (6, 9, 10)
11 Unscrew clamping nut (10) from the valve seat (6), replace
diaphragm (9), O-rings (7 and 14) and spring (11).
Replace the valve seat (6).
Assemble (10, 6, 9, 7, 14, and 11), tighten slightly with tongs
12 Replace O-ring (8)
13 Place spring (11) on the clamping nut (10) and place together
with the diaphragm assembly (6, 7, 9, 10, 14) into the body
(16).
14 Place upper body (5) and union nut (15). Tighten slightly.
15 Turn upper body (5) with the gas inlet to the desired direction,
lock and tighten the union nut.
16 Place the valve stem with spring (4 with 3 and 12), place O-
ring (2) and screw the inlet screw (1) in.
17 Screw in the nozzle (black with number) and tailway (white
with letter), pay attention for the flow direction!
18 Connect operation water lines.
19 Replace the O-ring (19) in the gas inlet.
Connect the gas line.
20 Check for tightness and function.