Evoqua Wallace&Tiernan 50-200 Series, Manual

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50-200 EVAPORATOR FOR CHLORINE
WT.050.200.001.UA.IM.0814
39
EVOQUA W3T98237
e. Refer to dwg. 50.200.060.020. When the tank is full of water the cathodic
protection mA meter (7) should indicate a current of between 50 and 250
milliamps. The cathodic current can be increased by adding 1/4 pound of
sodium sulfate, W2T15555, or decreased by adjusting the potentiometer
(10) on the evaporator control panel. If a current above 250 milliamps is
maintained the anodes will deteriorate quickly and the anode debris will
be too large to be washed out of the water tank drain.
4.8 Power and Alarm Lights on Control Box
The lamps inside the power and alarm lights on the control box are rated for
5000 hours of life, therefore, they will eventually burn out. See Section 6, Spare
Parts List, for information on ordering replacement bulbs. The recommendation
for bulb replacement is as follows:
a. Perform the Short Term Shutdown in section 3.2.3, a-c.
b. Turn off the in coming 3-phase power at the evaporator controls enclosure
via the enclosure door latch switch (9, Dwg. 50.200.060.020).
c. Unscrew appropriate indicator light lenses.
d. Push in on bulb and turn counter clockwise to align tabs on bulb base
with slot in bulb housing base.
e. Withdraw bulb from housing.
f. Insert new bulb.
g. Screw on appropriate indicator light lenses.
h. Reapply 3-phase power at the evaporator controls enclosure via the en-
closure door latch switch (9, Dwg. 50.200.060.020).
i. Perform the Startup in section 3.2.1.
4.9 Hot Water Circulating Pump
The manufacturer of the pump has made two repair kits available for the pump:
• Pump housing seal kit
• Shaft seal kit.
Part numbers for these kits are found in the Section 6, Spare Parts List.