Refrigerating Specialties Division
6
DISASSEMBLY AND ASSEMBLY
Refer to the exploded views (Fig. 4, 5 and 6) for parts discussed in this
section. Before disassembling or assembling any modules, refer to page
2 of this bulletin and to Bulletin RSB, Safety Procedures for Refrigerating
Specialties Division Refrigeration Control Valves. Before disassembly,
make sure all refrigerant has been removed from the regulator.
MODUDAPTER
®
(Fig. 5).
This Adapter 51 is used in place of standard Adapter 28 in Fig. 1, page
2 to allow the use of the modular pilots and is fastened to the Valve
Body 32 with Cap Screws 31. To convert an A4A or A4AO Regulator to
one with any of the Modular Variations follow the General Procedure
for the A4A (pages 1 and 2) and replace the Adapter 28 with the
Modudapter. Make sure this Modudapter gauge port is directly lined up
with the inlet of the regulator and that Path X is lined up with Passage
N in the regulator body (see Fig. 7, page 7). Make sure that the hole in
Gasket 29 is lined up with Path X and Passage N. Protect the surfaces
of Pads 1 and 2 at all times since these surfaces determine the sealing
tightness of the “O” rings.
When the Modudapter is field installed the completely assembled
regulator should be leak tested before the system is put into operation.
A2D MODULAR PRESSURE PILOT (Fig. 4 and Fig. 10)
This pressure pilot is used where a dual pressure regulator is desired
and is mounted on Pad 2. Follow the disassembly and assembly
procedure for the A4A pilot (pages 2 and 3). When mounting the pilot,
place the “O” Rings 50 into the proper grooves and tighten the Cap
Screws 49 evenly. The ideal tightening torque is 1.1 kg-m (8 ft.-lbs.).
S6A MODULAR SOLENOID PILOT (Fig. 6 and Fig. 12)
This solenoid pilot may be mounted either on Pad 1 or 2, depending on
the function desired (see pages 7 and 8). Before working on any solenoid
pilot, make sure the coil is de-energized and will remain so.
Disassembly - Remove Coil Housing Screw 55 and pull entire Coil
and Housing Assembly, 56 through 60, upward and off of Bonnet-Tube
Assembly 61. Carefully remove Bonnet-Tube Assembly. Lift out
Plunger-Needle Assembly 63, avoid damaging the needle. Remove Seat
Assembly 64 by using a 7/16" (11 mm) wrench. Inspect all parts, clean
or replace as needed.
Assembly - Reinstall the Seat Assembly and tighten (no gasket
needed). Carefully insert the Plunger Needle Assembly. Replace the
Gasket 62 and re-install Bonnet-Tube Assembly. Replace entire Coil
and Housing Assembly and tighten Coil Housing Screw.
Make sure
the solenoid coil is of the proper voltage and frequency (Hz).
When mounting the solenoid pilot, place the “O” Rings 50 into the proper
grooves and tighten the Cap Screws 66 evenly. The ideal tightening
torque is 1.1 kg-m (8 ft.-lbs.).
MODUPLATE (Fig. 5 and Fig. 11)
See pages 7 and 8 showing the use of this plate. Protect the “O” ring
surfaces at all times. When mounting the Moduplate, place “O” Rings
50 (or “O” Ring 54) into the proper grooves and tighten the Cap Screws
53 evenly to avoid distortion and assure proper sealing. The ideal
tightening torque is 1.1 kg-m (8 ft.-Ibs.).
