in-lbs (1,7 - 2,3 Nm). On solenoids with screw terminals, the socket head
screw holding the terminal block to the solenoid is the grounding screw.
Torque the screw to 15 - 20 in-lbs (1,7 - 2,3 Nm). with a 5/32" hex key wrench.
• Junction Box
The junction box is used with spade or screw terminal solenoids only
and is provided with a grounding screw and a 1/2" conduit connection.
Connect #12-18AWG standard copper wire only to the screw terminals.
Within the junction box use field wire that is rated 90°C or greater for
connections. For steam service use 105°C rated wire up to 50 psi or
use 125°C rated wire above 50 psi. After electrical hookup, replace
cover gasket, cover, and screws. Tighten screws evenly in a crisscross manner.
• DIN Plug Connector Kit No. KC236-034
1. The open—frame solenoid is provided with DIN terminals to accommodate
the DIN plug connector kit.
2. Remove center screw from plug connector. Using a small screwdriver,
pry terminal block from connector cover.
3. Use #12-18 AWG stranded copper wire rated at 90°C or greater for
connections. Strip wire leads back approximately 1/4" for installation in
socket terminals. The use of wire-end sleeves is also recommended for
these socket terminals. Maximum length of wire-end sleeves to be
approximately 1/4". Tinning of the ends of the lead wires is not recommended.
4. Thread wire through gland nut, gland gasket, washer, and connector
cover.
NOTE:
Connector cover may be rotated in 90° increments from position
shown for alternate positioning of cable entry.
5. Check DIN connector terminal block for electrical markings. Then make
electrical hookup to terminal block according to markings on it. Snap
terminal block into connector cover and install center screw.
6. Position connector gasket on solenoid and install plug connector.
Torque center screw to 5 ± 1 in-lbs (0,6 ± 1,1 Nm).
NOTE:
Alternating current (AC) and direct current (DC) solenoids are built
differently. To convert from one to the other, it may be necessary to
change the complete solenoid including the core and solenoid base sub-
assembly, not just the solenoid. Consult ASCO.
Installation of Solenoid
Solenoids may be assembled as a complete unit. Tightening is accomplished
by means of a hex flange at the base of the solenoid. The 3/4" bonnet con-
struction (Figure 1) must be disassembled for installation and installed
with a special wrench adapter.
Installation of Panel Mounted Solenoid
(See Figure 3)
Disassemble solenoid following instruction under Solenoid Replacement
then proceed
3/4" Valve Bonnet Construction
1. Install retainer(convex side to solenoid) in 1.312 diameter mounting hole
in customer panel.
2. Then position spring washer over plugnut/core tube sub-assembly.
3. Install plugnut/core tube sub-assembly through retainer in customer
panel. Then replace solenoid, nameplate/retainer and red cap.
15/16" Valve Bonnet Construction
1. Install solenoid base sub-assembly through 0.69 diameter mounting
hole in customer panel.
2. Position spring washer on opposite side of panel over solenoid base
sub-assembly then replace.
Solenoid Temperature
Standard solenoids are designed for continuous duty service. When the
solenoid is energized for a long period, the solenoid becomes hot and can
be touched by hand only for an instant. This is a safe operating temperature.
MAINTENANCE
WARNING: To prevent the possibility of personal injury or property dam-
age, turn off electrical power, depressurize solenoid operator and/or
valve, and vent fluid to a safe area before servicing.
Cleaning
All solenoid operators and valves should be cleaned periodically. The time
between cleaning will vary depending on medium and service conditions.
In general, if the voltage to the solenoid is correct, sluggish valve operation,
excessive noise or leakage will indicate that cleaning is required. Clean
strainer or filter when cleaning the valve,
Preventive Maintenance
• Keep the medium flowing through the solenoid operator or valve as
free from dirt and foreign material as possible.
• While in service, the solenoid operator or valve should be operated at
least once a month to insure proper opening and closing.
• Depending on the medium and service conditions, periodic inspection
of internal valve parts for damage or excessive wear is recommended.
Thoroughly clean all parts. Replace any worn or damaged parts.
Causes of Improper Operation
• Faulty Control Circuit:
Check the electrical system by energizing the
solenoid. A metallic click signifies that the solenoid is operating.
Absence of the click indicates loss of power supply. Check for loose or
blown fuses, open-circuited or grounded solenoid, broken lead wires or
splice connections.
• Burned-Out Solenoid:
Check for open-circuited solenoid. Replace if
necessary. Check supply voltage; it must be the same as specified on
nameplate/retainer and marked on the solenoid. Check ambient temperature
and check that the core is not jammed.
• Low
Voltage:
Check voltage across the solenoid leads. Voltage must
be at least 85% of rated voltage.
Solenoid Replacement
1. On solenoids with lead wires disconnect conduit, coil leads, and
grounding wire.
NOTE: Any optional parts attached to the old solenoid must be reinstalled
on the new solenoid.
2. Disassemble solenoids with optional features as follows:
• Spade or Screw Terminals
Remove terminal connections, grounding screw, grounding wire, and
terminal block (screw terminal type only).
NOTE: For screw terminals, the socket head screw holding the terminal
block serves as a grounding screw.
• Junction
Box
Remove conduit and socket head screw (use 5132" hex key wrench)
from center of junction box. Disconnect junction box from solenoid.
•
DIN Plug Connector
Remove center screw from DIN plug connector. Disconnect DIN plug
connector from adapter. Remove socket head screw (use 5/32" hex key
wrench), DIN terminal adapter, and gasket from solenoid.
3. Snap off red cap from top of solenoid base sub-assembly.
4. Push down on solenoid. Then using a suitable screwdriver, insert blade
in slot provided between solenoid and nameplate/retainer. Pry up
slightly and push to remove. Then remove solenoid from solenoid base
sub-assembly.
5. Reassemble using exploded views for parts identification and placement
Disassembly and Reassembly of Solenoids
1. Remove solenoid, see Solenoid Replacement.
2. Remove finger washer or spring washer from solenoid base sub-assembly.
3. Unscrew solenoid base sub-assembly.
NOTE: Some solenoid constructions have a plugnut/core tube
sub-assembly, bonnet gasket and bonnet in place of the solenoid base
sub-assembly. To remove bonnet use special wrench adapter supplied in
ASCO Rebuild Kit. For wrench adapter only, order ASCO Wrench Kit
No.K218 - 948.
4. The core is now accessible for cleaning or replacement.
5. If the solenoid is part of a valve, refer to basic valve installation and
maintenance instructions for further disassembly.
6. Reassemble using exploded views for identification and placement of
parts.
ORDERING INFORMATION FOR ASCO SOLENOIDS
When Ordering Solenoids for ASCO Solenoid Operators or Valves, order
the number stamped on the solenoid. Also specify voltage and frequency.
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