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Refrigerating Specialties Division

5

1

2
3

4
5

6

8

9

10

11

12

13

14

15
16
17

18

19

54

50

27

52

53

31

28

29

30

45

32

33

33B

33A

33

46

47

34

35

36

37

38

40

3/4 - 1¼"

41

43

44

42

39

3/4 - 1¼"

Fig. 6

Item  Description

1

S eal  Cap

2

Gask et, Seal Cap

3

Nut, S tuffing B ox

4

P acking Ring

5

P acking Washer

6

A djusting S tem

7

Fitting, B onnet

8

B onnet

9

Nam eplate

10

S c rew, Nam e P late

11

S c rew, B onnet

12

S pring Rest, Upper

13

S pring, Range

14

S pring Rest, Lower

15

Diaphragm  Follower

16

Gask et, Bonnet

17

Diaphragm

18

S eat, Pilot

19

Gask et, Adapter

27

Gauge P ort Pipe P lug

28

A dapter, B ody

29

Gask et, Body

30

P iston-S tem

31

S c rew,  B ody

32

B ody

33

Throttling P lug A s m

34

S pring, Clos ing

35

Dirt Wiper Retainer

36

Dirt Wiper

37

S eal, B ottom  Cap

38

B ottom  Cap

39

S c rew,  B ottom   Cap

40

P acking Washer

41

P acking Ring

42

S tuffing B ox Nut

43

Gask et, Seal Cap

44

S eal Cap

45

Gask et, Flange

46

B olt, Flange

47

Nut, Flange

48

P ilot  B ody

49

S c rew,  P ilot  B ody

50

O-Ring

51

M odudapter

52

M oduplate

53

S c rew, M oduplate

54

O-Ring (Large)

58

Coil A ssem bly

61

B onnet-Tube A sm

62

Tube Gasket

63

P lunger-Needle A sm

64

S eat A sm

65

S olenoid P ilot B ody

66

S c rew, S olenoid P ilot

67

O-Ring

68

K nob

69

Lens

70

B ulb

71

O-Ring

For replacement parts and prices, consult
PARTS KITS LIST PRICE SCHEDULE
INDUSTRIAL AND FLO-CON (PK)

Summary of Contents for ADAPTOMODE A4AS-DN

Page 1: ... C 50 F to 220 F Principles of Operation See Fig 1 The inlet pressure enters the space under the diaphragm through passage N When the force created by the pressure exceeds the force of the range spring the diaphragm is lifted off the pilot seat allowing pressure to enter on top of the power piston This causes the power piston to move downward forcing the modulating plug to open and modulate to mai...

Page 2: ...ng the regulator function i e not regulating However in the wide open mode the regulator will still require the 0 14 bar 2 psi minimum pressure drop When the solenoid is de energized the valve functions as an Inlet Pressure Regulator Purpose The Type A4AB frequently is used with the wide open function where maximum refrigeration capacity from an evaporator is required During the defrost of the eva...

Page 3: ...Refrigerating Specialties Division 3 BASIC ADAPTOMODE FUNCTIONS Fig 2 A4AZ Fig 3 A4AS Fig 4 A4AB Fig 5 A4AD ...

Page 4: ...4A Regulators General Procedure The construction of the regulator and the method of disassembly are relatively simple but some procedures must be followed to avoid damage The following describes the procedure for the basic A4A special instructions for other types are included in other appropriate sections Disassembly Take care when removing Seal Caps 1 and 44 in case some refrigerant may be trappe...

Page 5: ...e Port Pipe Plug 28 Adapter Body 29 Gasket Body 30 Piston Stem 31 Screw Body 32 Body 33 Throttling Plug Asm 34 Spring Closing 35 Dirt Wiper Retainer 36 Dirt Wiper 37 Seal Bottom Cap 38 Bottom Cap 39 Screw Bottom Cap 40 Packing Washer 41 Packing Ring 42 Stuffing Box Nut 43 Gasket Seal Cap 44 Seal Cap 45 Gasket Flange 46 Bolt Flange 47 Nut Flange 48 Pilot Body 49 Screw Pilot Body 50 O Ring 51 Moduda...

Page 6: ...odular Solenoid Pilot Figs 10 and 12 This solenoid pilot may be mounted on either Pad 1 or 2 depending on the function desired see pages 2 and 3 Before working on any Fig 11 A2D2 A2D MODULAR PRESSURE PILOT A2D2 Port Sizes 20 50mm 3 4 2 A2D Port Sizes 65 100mm 2 4 1 2 3 4 5 6 11 8 9 10 12 13 14 15 16 17 18 19 48 49 50 solenoid pilot make sure the coil is de energized and will remain so during the s...

Page 7: ...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 Contact Factory On transformer coil the 6 volt leads are always black Fig 12 S6A MODULAR SOLENOID PILOT A2D MODULAR PRESSURE PILOT MODUPLATE Safe Operation See also Bulletin RSBCV People doing any work on a refrigeration system must be qualified and completely familiar with the system a...

Page 8: ...It Range D make sure has 2 open ruptured or badly deformed diaphragms Diaphragm follower stuck damaged or frozen Clean or replace Install follower carefully A4AS A4AB Modular Solenoid Pressure drop across valve too high over 21 bar 300 psig Lower pressure Pilot not opening drop Improper power supply Correct Replace solenoid coil Piston worn too much clearance Replace piston Check for reason If use...

Page 9: ...Flange Pipe Size Socket I D Neck O D Number 2 Pkg O D I D Flge Pkg Pipe Size Pkg No Socket Weld No 2 Pkg mm Inches Inches 2 Pkg Inches NW No Inches mm Inches mm Weld Neck Inches mm Inches mm 20 3 4 3 4 200016 3 4 20 1 070 27 81 1 050 26 67 200020 200023 1 1 8 28 57 1 130 28 70 200027 and and 1 200017 1 25 1 365 34 67 1 315 33 40 200021 200024 1 3 8 34 92 1 380 33 05 200028 25 1 1 1 4 200018 1 1 4 ...

Page 10: ...G 40 3 42 4 1 61 L ADAPTER 2 A4A DN DUCTILE IRON GGG 40 3 COVER BOTTOM A4A S4A 1 5 8 to 2 1 2 DUCTILE IRON GGG 40 3 BONNET A4W DUCTILE IRON GGG 40 3 COMPONENT DESCRIPTION MATERIAL Kv VOLUME BODY 2 1 2 A4A DN DUCTILE IRON GGG 40 3 60 3 19 L ADAPTER 3 A4A DN DUCTILE IRON GGG 40 3 COVER BOTTOM 3 A4A S4A DUCTILE IRON GGG 40 3 BONNET A4W DUCTILE IRON GGG 40 3 COMPONENT DESCRIPTION MATERIAL Kv VOLUME BO...

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