EVAPCO ATC-E User Manual

31
Problem Possible Cause Remedy
Foreign material on
surface of SS
Cracking paint
The valve won't open or
close
Rust spots that show up on the surface of the unit are typically not signs
of the base stainless steel material corroding. Oen, 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 either Naval Jelly or a good stainless steel cleaner, such as Mother’s
Wax in conjunction with a Scotch-Brite pad. Maintenance of the unit’s
surface should be done on a regular basis.
Most of the time, it is the paint that is cracking and not the insulation. If
the paint is degrading, it should be touched up to maintain the finish on
the insulation. It is recommended that maintaining the finish of the
insulation paint be a part of the standard maintenance program. If the
insulation is cracking, see your local Evapco representative for further
guidance.
1. Verify that water pressure is above 5psi and below 100psi.
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
Aer cleaning the probes, li 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)
For a 5-Probe Assembly:
Simulate "Low Water Condition"
Aer cleaning the probes, li probe assembly out of the stand pipe. This
will simulate a "low water condition". Check the contacts for proper
position.
- Differential Contacts: C to NC - closed - Water make-up valve
energized - LED = OFF
- High Alarm Contacts: C to NO - open - High alarm circuit
de-energized - LED = OFF
- Low Alarm Contacts: C to NC - closed - Low alarm circuit
energized - LED = OFF
Simulate "High Water Condition"
Connect a jumper wire between the longest probe (ground) and all other
probes (high limit, high alarm, and low alarm). Check the contacts for
proper position.
- Differential Contacts: C to NC - open - Water make-up valve de-
energized - LED = ON
- High Alarm Contacts: C to NO - closed - High alarm circuit energized
- LED = ON
- Low Alarm Contacts: C to NC - open - Low alarm circuit de-energized
- LED = ON
Rusting Stainless Steel
Cracking Fluid Cooler
Insulation
Electric Water Level
Control Not Working
Electric Water Level
Control Not Working
L1
L2
NC C NO
I
NTEGRAL LEVEL
PROBE/RELAY IN A NEMA 4
POLYCARBONATE
ENCLOSURE 017-00182P
ELECTRIC MAKE-UP VALVE (NOR-
MALLY CLOSED) 120v POWER RE-
QUIRED TO OPEN
L1
L2
NC
LOW ALARM HIG H ALARM
C NO NC C NO NC C NO
L L
120 VAC/60Hz
INTEGRAL LEVEL
PROBE/RELAY
IN A NEMA 4
POLYCARBONATE
ENCLOSURE
017-00299P
ELECTRIC MAKE-UP
VALVE (NORMALLY
CLOSED) 120v POWER
REQUIRED TO OPEN
ALARM CIRCUIT
VOLTAGE
(AS DESIRED)

EVAPCO ATC-E Specifications

General

Brand	EVAPCO
Model	ATC-E
Category	Accessories
Language	English