27
Troubleshooting (Follows)
Problem Possible Cause Remedy
Electronic Water Level
Control
Float Bulb not set
correctly
Foreign material on
surface of SS
The valve won’t open or
close
See EWLC Section
Adjust float ball up or down to obtain proper water level. Note: The
float ball is set to the operating level at the factory.
Rust spots that show up on the surface of the unit are typically not
signs of the base stainless steel material corroding. Often, they are
foreign material, such as welding slag, that has collected on the
surface of the unit. The rust spots will be located around where there
has been welding. These areas may include the coil connections,
the cold water basin near the support steel, and around field erected
platforms and catwalks. The rust spots can be removed with a good
cleaning. EVAPCO recommends using a good stainless steel cleaner
in conjunction with a Scotch-Brite pad. Maintenance of the unit’s
surface should be done on a regular basis.
1. Verify that water pressure is above 0,35 bar and below 7,0 bar.
2. Verify wiring with wiring diagram. Check supply voltage.
3. Verify that there is not a blockage in the Y-Strainer
4. Confirm the probes are not dirty.
5. Check Red LED on circuit board. If it is on, the valve should be
closed.
For a 3-Probe Assembly:
Simulate “Low Water Condition” - LED OFF
After cleaning the probes, lift probe assembly out of the stand pipe.
This will simulate a “low water condition”. Check the contacts for
proper position.
- The contact between “C” and “NC” should now be closed and water
makeup valve should be energized (valve open)
Simulate “High Water Condition” - LED ON
- Connect a jumper wire between the longest probe and the shortest
probe. The contact between “C” and “NC” should now be open and
the water makeup valve should be de-energized (valve closed)
L1
L2
NC C NO
INTEGRAL LEVEL PROBE/
RELAY 017-00028v
ELECTRIC MAKE-UP VALVE
(NORMALLY CLOSED) 24V/230 V
POWER REQUIRED TO OPEN
L1
L2
NC C NO
Low Pan Water Level
Rusting Stainless Steel
Electric Water Level
Control Not Working
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