4
Parker Hannifin Corporation •
Refrigerating Specialties Division
2445 South 25th Avenue • Broadview, IL 60155-3891
Telephone: (708) 681-6300 • Fax (708) 681-6306
I
nstallation
Protect inside of valve from dirt, chips and moisture during installation.
Mount only in horizontal pipe line with solenoid coil at the top; this valve
will work properly only in this position. In a liquid line the Solenoid Valve
should be near the expansion valve inlet. It is advisable to install the S5A
close coupled companion strainer ahead of the valve for protection against
dirt and chips.
The S5A solenoid valve must be installed with the arrow on the valve body in
the direction of flow through the valve. If the valve is backwards, the flow will
not be stopped when the valve is electrically de-energized. Like all Solenoid
Valves, the S5A can stop flow only in the direction from normal inlet to normal
outlet (as shown by the arrow on the body). If reversal of pressure occurs in
the system so the outlet pressure exceeds the inlet pressure the piston will
be blown away from its seat and reverse flow will occur. If a system has this
type of pressure reversal (as encountered during hot gas defrost with liquid
recirculation systems), a check valve such as Refrigerating Specialties Divi-
sion Type CK4A in series with the solenoid valve will prevent flow reversal.
(CK4A must be installed downstream to avoid trapping liquid.)
Electrical
The Refrigerating Specialties Division molded water resistant Class “B” so-
lenoid coil is designed for long life and powerful opening force. The standard
coil housing meets NEMA 3R and 4 requirements. This sealed construction
can withstand direct contact with moisture and ice. The coil housing far
exceeds the requirements of NEMA Standard ICS, 1-110.57 salt spray test
for rust resistance.
By definition, Class “B” coil construction will permit coil temperatures, as
measured by resistance method, as high as 130°C (266°F). Final coil tem-
peratures are a function of both fluid and ambient temperatures. The higher
fluid temperatures require lower ambient temperatures so the maximum
coil temperature is not exceeded. Conversely, low fluid temperatures permit
higher ambient temperatures.
The molded Class “B” coil is available from stock with most standard volt-
ages. However, coils are available for other voltages and frequencies, as well
as for direct current. Coils are also available as transformer type with a 6 volt
secondary winding for use with the Refrigerating Specialties Division Pilot
Light Assembly (see current copy of Bulletin 60-10, “Pilot Light Assembly
and Solenoid Transformer Coil”).
The solenoid coil must be connected to electrical lines with volts and Hertz
same as stamped on coil. The supply circuits must be properly sized to give
adequate voltage at the coil leads even when other electrical equipment
is operating. The coil is designed to operate with line voltage from 85% to
110% of rated coil voltage. Operating with a line voltage above or below these
limits may result in coil burnout. Also, operating with line voltage below the
limit will definitely result in lowering the valve opening pressure differential.
Power consumption during normal operation will be 33 watts or less.
Inrush and running current is listed below:
Inrush
Running
Fuse
Standard Coil
Current
Current
Size
Volts/Hertz
(Amps)
(Amps)
(Amps)
120/60 (Blue leads)
1.18
0.46
1
208/60 (Blue & Red leads)
0.63
0.26
1
240/60 (Red leads)
0.60
0.23
1
440/60 (Yellow & Red leads)
0.39
0.13
1
115/50 (Yellow & Blue leads)
1.22
0.21
1
230/50 (Yellow leads)
0.65
0.26
1
Other
(Consult Factory)
On transformer coil the 6 volt leads are always black.
Service Pointers
The S5A Solenoid Valve and Strainer are easily removable for cleaning or
repairing. To remove valve and strainer, merely unscrew the flange bolts
and spread the flanges slightly apart.
1. Failure to Open:
(a) Coil is of incorrectly high voltage, See “Electrical.”
Check voltage printed on the coil. (b) Line voltage is abnormally low. See
“Electrical.” Check line voltage at coil leads with a voltmeter. (c) Failure to
electrically energize. Check control circuit. (d) Pressure difference across
valve is too high. The S5A will open against a maximum pressure difference
across the valve of 20.7 Bar (300 psig). (e) Solenoid Coil is burned out. See
“Electrical,” and replace with proper coil. (f) Plunger/Needle Assembly is
sticking. To disassemble the valve for inspection of internal parts (after
pumping out the system as required): disconnect power source to #4
Solenoid Coil, remove #7 Tube Assembly, lift out #9 Plunger Assembly, then
remove #11 Adapter Assembly and #31 piston plug. Remove every trace of
dirt from the piston and cylinder using fine emery cloth to remove burrs if
necessary. Thoroughly clean all parts and reassemble using a light film of
refrigeration oil on the Piston.
2. Failure to Close:
(a) Electrical control circuit is not opening properly.
Check wiring and controls. (b) There are chips or dirt on the Pilot Seat or the
Main Valve Seat, preventing proper seating. Disassemble and clean Valve as
outlined in (1f) above. (c) Main Valve Seat, Pilot Seat, or Valve Needle may
be worn or damaged and therefore leaking. Disassemble and clean Valve as
outlined in (1f) above. If any of these parts need replacing, it is advisable to
replace using the proper replacement kit. (d) #31 Piston is sticking. See (1f)
above. (e) #32 Manual Opening Stem is turned all or partly in holding #31
Piston Plug Assembly open and permitting flow through the valve. (f) #5 Coil
Housing Screw (made of non-magnetic stainless steel) has been replaced
with a screw made of magnetic material and residual magnetism is holding
#9 Plunger Needle Assembly in the open position. Consequently, the Main
Valve is not closing. Replace with screw of correct material.
3. Leakage Through Valve:
See (2) above.
4. Overheating:
The Solenoid Coil is designed to operate hot and is con-
structed of high temperature materials accordingly. Unless troubled with
actual Coil burnouts, high coil temperature should be ignored. Persistent
burnouts indicate improper line or coil voltage. See (1e) above.
Warranty
All Refrigerating Specialties Products are warranted against defect in
workmanship and materials for a period of one year from date of shipment
from factory. This warranty is in force only when products are properly
installed, field assembled, maintained and operated in use and service as
specifically stated in Refrigerating Specialties Catalogs or Bulletins for
normal refrigeration applications, unless otherwise approved in writing
by Refrigerating Specialties Division. Defective products, or parts thereof,
returned to the factory with transportation charges prepaid and found to be
defective by factory inspection will be replaced or repaired at Refrigerating
Specialties option, free of charge, F.O.B. factory. Warranty does not cover
products which have been altered or repaired in the field, damaged in transit,
or have suffered accidents, misuse, or abuse. Products disabled by dirt or
other foreign substances will not be considered defective.
THE EXPRESS WARRANTY SET FORTH ABOVE CONSTITUTES THE ONLY
WARRANTY APPLICABLE TO REFRIGERATING SPECIALTIES PRODUCTS,
AND IS IN LIEU OF ALL OTHER WARRANTIES. EXPRESS OR IMPLIED,
WRITTEN OR ORAL, INCLUDING ANY WARRANTY OF MERCHANTABILITY,
OR FITNESS FOR A PARTICULAR PURPOSE. No employee, agent, dealer or
other person is authorized to give any warranties on behalf of Refrigerating
Specialties, nor to assume, for Refrigerating Specialties, any other liability
in connection with any of its products.
Safe Operation
(see also Bulletin RSBCV)
People doing any work on a refrigeration system must be qualified and
completely familiar with the system and the Refrigerating Specialties
Division valves involved, or all other precautions will be meaningless. This
includes reading and understanding pertinent Refrigerating Specialties
Division Product Bulletins, and Safety Bulletin RSB prior to installation or
servicing work.
Where cold refrigerant liquid lines are used, it is necessary that certain pre-
cautions be taken to avoid damage which could result from liquid expansion.
Temperature increase in a piping section full of solid liquid will cause high
pressure due to the expanding liquid which can possibly rupture a gasket,
pipe or valve. All hand valves isolating such sections should be marked,
warning against accidental closing, and must not be closed until the liquid
is removed. Check valves must never be installed upstream of solenoid
valves, or regulators with electric shut-off, nor should hand valves upstream
of solenoid valves or downstream of check valves be closed until the liquid
has been removed. It is advisable to properly install relief devices in any
section where liquid expansion could take place.
Avoid all piping or control arrangements which might produce thermal or
pressure shock.
For the protection of people and products, all refrigerant must be removed
from the section to be worked on before a valve, strainer, or other device
is opened or removed.
Flanges with ODS connections are not suitable for ammonia service.
