Evoqua Wallace&Tiernan 50-200 Series, Руководство пользователя

Страница: 48 / 111

50-200 EVAPORATOR FOR CHLORINE
WT.050.200.001.UA.IM.0814
37
EVOQUA W3T98237
4.6 Electrical System Checks
Make electrical checks described in paragraphs 4.6.1 and 4.6.2.
WARNING: TO AVOID POSSIBLE SEVERE PERSONAL INJURY DUE TO EQUIP-
MENT MALFUNCTION, SEMI-ANNUALLY MAKE A COMPLETE ELECTRICAL
CHECK OF THE OPERATION OF THE TEMPERATURE, WATER LEVEL, AND
PRESSURE RELIEF ALARM SWITCHES. IF THE APPROPRIATE RESPONSE IS
NOT OBSERVED, REPLACE THE FAULTY CONTROL UNIT.
4.6.1 Temperature Switches
The high and low temperature switches are factory calibrated. No adjustment
is necessary.
4.6.2 Water Level Switch and Low Level Switch
a. Drain the water to below the sightglass and allow it to refill. If level control
is working properly, it will refill automatically and the low level alarm will
activate and reset.
b. Close drain tightly when testing is completed.
4.6.3 Pressure Switch (Evaporator Relief System)
a. Remove the switch cover.
b. Using a thin screwdriver, operate the microswitch and observe operation
of the alarm.
WARNING: TO AVOID POSSIBLE SEVERE PERSONAL INJURY FROM ELEC-
TRICAL SHOCK, BE CAREFUL NOT TO TOUCH THE METAL SCREWS ON THE
TERMINALS. THEY ARE CONNECTED TO 115 VOLTS.
c. Replace the switch cover when testing is completed.
4.7 Cathodic Protection System
The 50-200 Evaporator utilizes a sacrificial cathodic protection circuit to protect
the cylinder and water tank from corrosion (refer to dwg. 50.200.140.010).
The ideal current is between 50 and 250 milliamps. On a new evaporator, the
anodes will last well over a year. A lower milliamp current reading on a new
evaporator is normal as the paint protecting the cylinder often limits the ca-
thodic protection current. As the paint on the cylinder deteriorates the flow
of current will increase.
!
!