Pilots With Set Point Indication; Parts Ordering; Parts Kits - Fisher 4660 Instruction Manual

14. Install the front plate and the panel mounting plate
(if required).
15. Install the locking disk(s) with the tab(s) as close to
90 degrees to the right of vertical as possible.
16. If the locking disk(s) cannot be installed as de-
scribed in step 15, install the tab(s) between vertical
and 90 degrees, rather than beyond the 90 degree
position.
17. Perform steps 6 through 11 of the Bourdon tube/
flapper assembly replacement procedure.

Pilots With Set Point Indication

1. Perform steps 1 through 4 of the Bourdon tube/flap-
per assembly replacement procedure.
2. Remove the set point indication module by loosen-
ing the set screws that attach the module to the set
point assembly stem, and pulling it away from the front
plate (key 74).
3. Remove the screws (key 68) and the set point as-
sembly.
4. Install the new set point assembly and tighten the
screws.
5. Repeat steps 2 through 4 if both set point assem-
blies are to be replaced on a high-low version of the
pilot.
6. Install the front plate and the panel mounting plate
(if required).
7. Align the three posts on the set point indication
module(s) with the three holes on the front plate.
8. Push the set point indication module(s) flush with
the front plate and tighten the set screws. Do not over-
tighten the set screws.
9. Perform steps 6 through 11 of the Bourdon tube/
flapper assembly replacement procedure.

Parts Ordering

Whenever corresponding with the Fisher sales office
or sales representative about this equipment, always
mention the pilot serial number located on the name-
plate (key 76, figure 8) on the rear of the pilot. When
ordering replacement assemblies or parts, refer to the
11-character part number of each assembly or part as
found in the following parts list.

Parts Kits

Key Description
Block-and-Bleed Relay Assembly
––– Block-and-Bleed Relay Replacement Assy
(Includes block-and-bleed assembly
and keys 53 and 57)
Low Temperature (Fluorosilicone
Elastomers)
Standard Temperature (Nitrile
Elastomers)
Bourdon Tube/Flapper Assembly
––– Bourdon Tube/Flapper Assembly (Includes
Bourdon tube/flapper and keys 18, 27, 73)
Stainless Steel Bourdon Tube
Bourdon Tube Rating
100 psig (6.9 bar)
250 psig (17.2 bar)
500 psig (34.5 bar)
1000 psig (69.0 bar)
1500 psig (103.4 bar)
2500 psig (172.4 bar)
5000 psig (344.8 bar)
7500 psig (517.1 bar)
N05500 (K-Monel) Bourdon Tube (NACE)
Bourdon Tube Rating
100 psig (6.9 bar)
250 psig (17.2 bar)
500 psig (34.5 bar)
1000 psig (69.0 bar)
1500 psig (103.4 bar)
2500 psig (172.4 bar)
5000 psig (344.8 bar)
7500 psig (517.1 bar)
10,000 psig (689.5 bar)
Front Cover Assembly
––– Front Cover Assembly (Includes keys 4,
6, 12, and 19)
Output Indicator
––– Output Indicator (Includes keys 13, 14,
88, 89, 90, and 91)
Set Point Assembly
––– Set Point Assembly
No Set Point (Includes keys 67, 69,
70, and 71)
Low Set Point (Includes set point
assembly and keys 67, 68, 69, 70, and 71)
High Set Point (Includes set point
assembly and keys 67, 68, 69, 70, and 71)
Set Point Indicator
––– Set Point Indicator (Includes set
point assembly and adjustment key)
High Set Point
Bourdon Tube Rating
100 psig (6.9 bar)
250 psig (17.2 bar)
500 psig (34.5 bar)
1000 psig (69.0 bar)
Type 4660
Part Number
R4660X AVR22
R4660X BBA22
R4660X BTFJ2
R4660X BTFK2
R4660X BTFL2
R4660X BTFM2
R4660X BTFN2
R4660X BTFP2
R4660X BTFR2
R4660X BTFS2
R4660X BTF12
R4660X BTF22
R4660X BTF32
R4660X BTF42
R4660X BTF52
R4660X BTF62
R4660X BTF72
R4660X BTF82
R4660X BTF92
R4660X FCA22
R4660X 0PUT2
R4660X SPA32
R4660X SPA22
R4660X SPA12
R4660X SP1A2
R4660X SP1B2
R4660X SP1C2
R4660X SP1D2
13