AMOT 4102D User manual

Temperature Detectors for Moving Bearings
Models 4102D, E, J & M
Datasheet_4102_Temperature_Detector_FEB18_Rev3 Page 1
www.amot.com
Typical applications
• Accurate and reliable in engines used for gas
compression, power generation, pipeline,
marine and general industrial service
• Monitors bearings, shafts and other moving
parts for unsafe high temperature levels
• Responds to increased bearing temperatures
caused by:
- Tight, worn or out-of-round bearings
- Cracked or broken shafts
- Power or compressor cylinder overload
- Lack of lubrication uid
- Tight packing glands
- Torsional vibration
- Mis-alignment
- Other sources of temperature rise
Key features and benets
• Provides early warning of problems - avoids
high cost bearing failures
• Use with oil, air or gas
• Instant response to excessive bearing
temperatures
• Compact design - easy, low cost installation
• Minimal maintenance - low cost of ownership
Model 4102D/E/J
Temperature Detector Model 6702X Spare
Fuse Rod
Model 4102M Miniature
Temperature Detector
Model 7334X Spare
Fuse Rod

Temp. Detectors for Moving Bearings - Model 4102D/E/J/M
Datasheet_4102_Temperature_Detector_FEB18_Rev3 Page 2
Contents
Overview ........................................................................... 3
Operation .......................................................................... 3
Typical Application .............................................................. 3
Installation Factors ............................................................. 3
Valve Characteristics ........................................................... 4
Installed depth .............................................................. 4
Fuse rod length code selection ......................................... 4
Fuse rod length ............................................................. 5
How to Order ..................................................................... 6
Specication ...................................................................... 6
Dimensions ........................................................................ 7
4102D/E/J .................................................................... 7
4102M ......................................................................... 7
Maintenance and Service Parts ............................................. 8
How to order replacement fuse rod assemblies .................. 8
Replacement fuse rod assembly model number structure .... 9
Contact ............................................................................. 10
A Warning indicates a hazardous situation that, if not avoided,
could result in death or serious injury to personnel. The text of
the warning describes the hazard and details of the precautions
that must be applied before the step of the procedure is carried
out.

Temp. Detectors for Moving Bearings - Model 4102D/E/J/M
Datasheet_4102_Temperature_Detector_FEB18_Rev3 Page 3
Overview
AMOT Model 4102D/E/J temperature detectors and
Model 4102M miniature temperature detectors are
ideal for use on medium and high speed engines.
The valves initiate a warning or shutdown upon a
sudden temperature rise in critical machine parts
caused by tight, worn or out-of-round bearings,
tight packing glands, cracked or broken shafts,
torsional vibration, power or compressor cylinder
overload, lack of lubricant ow and many other
sources.
The 4102M valves provide the same low cost
reliability for small bearings that have been
eld proven by their larger counterparts
(Model 4102D/E/J) in larger stationary bearing
applications.
Operation
AMOT Model 4102 temperature detectors are
a safety device suitable for monitoring bearing
temperature. A thin lm of eutectic alloy (less than
0.01 mm3in volume) secures a spring-loaded fuse
rod. When the temperature increases, the sensing
end melts the alloy and the fuse rod is instantly
released moving outwards.
Due to their small eutectic mass, the detectors are
virtually as responsive as thermocouples. Model
4102 temperature detectors do not require the
impractical wiring of electrical sensors.
The trip temperature will be between 79°C and
173°C (174°F to 343°F), depending on fuse rod
selection. To convert the detector tripping action
into a usable signal, use the AMOT Model 4095 vent
valve or Model 4395.
Model 4102 temperature detectors are designed
for use in moving parts such as connecting rod
bearings. For stationary bearing applications, refer
to AMOT model 4103, in which the vent valve is
incorporated in the temperature detector.
Typical Application
Do not heat unrestrained fuse rod assemblies.
They re with sufcient force to cause injury.
Failure to restrain or aim the fuse rod in a safe
direction can lead to serious bodily injury.

Temp. Detectors for Moving Bearings - Model 4102D/E/J/M
Datasheet_4102_Temperature_Detector_FEB18_Rev3 Page 4
Valve Characteristics
Installed depth
Table 1 - 4102D/E/J
Code
Installed depth
Minimum Maximum
mm inches mm inches
04 50.8 2” 63.5 2 ½”
05 63.5 2 ½” 76.2 3”
06 76.2 3” 88.9 3 ½”
07 88.9 3 ½” 101.6 4”
08 101.6 4” 114.3 4 ½”
09 114.3 4 ½” 127.0 5”
10 127.0 5” 140.0 5 ½”
11 140.0 5 ½” 152.4 6”
12 152.4 6” 165.0 6 ½”
13 165.0 6 ½” 178.0 7”
14 178.0 7” 191.0 7 ½”
15 191.0 7 ½” 203.0 8”
16 203.0 8” 216.0 8 ½”
17 216.0 8 ½” 229.0 9”
18 229.0 9” 241.0 9 ½”
19 241.0 9 ½” 254.0 10”
20 254.0 10” 267.0 10 ½”
Table 2 - 4102M
Code
Installed depth
Minimum Maximum
mm inches mm inches
00 19.1 ¾” 27.0 1 ”
01 41.3 1 ⅝” 49.2 1 ”
02 47.6 1 ⅞” 55.6 2 ”
03 54.0 2 ⅛” 61.9 2 ”
04 60.3 2 ⅜” 68.3 2 ”
05 66.7 2 ⅝” 74.6 2 ”
06 73.0 2 ⅞” 81.0 3 ”
07 79.4 3 ⅛” 87.3 3 ”
Installation Factors
• Control pressure source may be clean dry air/gas
(for versatile, non-hazardous locations).
• Maximum pressure to IN port of the vent valve is
60 psi.
• Install the vent valve above the oil level in the
sump to facilitate manual re-setting.
• Each sensing device should be connected to control
pressure lines and piped in series ending with the
master safety control/alarm component.
• Must NOT be installed with the fuse rod tip
permitted to dip in the sump.
• Not recommended for installation where oil may
leak along the unsealed fuse rod shaft.
• See Fig. 1 or Fig. 2, on page 6 and 7 respectively,
for general method of installation.

Temp. Detectors for Moving Bearings - Model 4102D/E/J/M
Datasheet_4102_Temperature_Detector_FEB18_Rev3 Page 5
Table 3 - 4102D/E/J
Install
depth
code
(Table 1)
Projection length
Flush ½” 1” 1 ½” 2” 2 ½” 3”
Fuse rod length code
04 04 05 06 07 08 09 10
05 05 06 07 08 09 10 11
06 06 07 08 09 10 11 12
07 07 08 09 10 11 12 13
08 08 09 10 11 12 13 14
09 09 10 11 12 13 14 15
10 10 11 12 13 14 15 16
11 11 12 13 14 15 16 17
12 12 13 14 15 16 17 18
13 13 14 15 16 17 18 19
14 14 15 16 17 18 19 20
15 15 16 17 18 19 20 21
16 16 17 18 19 20 21 22
17 17 18 19 20 21 22 23
18 18 19 20 21 22 23 24
19 19 20 21 22 23 24 25
20 20 21 22 23 24 25 26
Table 4 - 4102M
Install
depth
code
(Table 2)
Projection length
Flush ¼” ½” ¾” 1”
Fuse rod length code
00 01 02 03 04 05
01 06 07 08 09 10
02 07 08 09 10 11
03 08 09 10 11 12
04 09 10 11 12 13
05 10 11 12 13 14
06 11 12 13 14 15
07 12 13 14 15 16
Fuse rod length code selection
Valve Characteristics Continued
Fuse rod length
Table 6 - 4102M
Fuse rod lengths
Code
(Table 4) mm inches Code (Table 4) mm inches
01 39.7 1 ”09 81.0 3 ”
02 46.0 1 ”10 87.3 3 ”
03 52.4 2 ”11 93.7 3 ”
04 58.7 2 ”12 100.0 3 ”
05 65.1 2 ”13 106.4 4 ”
06 61.9 2 ”14 112.7 4 ”
07 68.3 2 ”15 119.1 4 ”
08 74.6 2 ”16 125.4 4 ”
Table 5 - 4102D/E/J
Fuse rod lengths
Code
(Table 3) mm inches Code (Table 3) mm inches
04 85.7 3 ⅜” 16 238.1 9 ⅜”
05 98.4 3 ⅞” 17 250.8 9 ⅞”
06 111.1 4 ⅜” 18 263.5 10 ⅜”
07 123.8 4 ⅞” 19 276.2 10 ⅞”
08 136.5 5 ⅜” 20 288.9 11 ⅜”
09 149.2 5 ⅞” 21 301.6 11 ⅞”
10 161.9 6 ⅜” 22 314.3 12 ⅜”
11 174.6 6 ⅞” 23 327.0 12 ⅞”
12 187.3 7 ⅜” 24 339.7 13 ⅜”
13 200.0 7 ⅞” 25 352.4 13 ⅞”
14 212.7 8 ⅜” 26 365.1 14 ⅜”
15 225.4 8 ⅞”

Temp. Detectors for Moving Bearings - Model 4102D/E/J/M
Datasheet_4102_Temperature_Detector_FEB18_Rev3 Page 6
Specication
Metric units English units
Body material Brass
Sensing material Eutectic alloy
Trip temperature range 79°C - 173°C 174°F - 343°F
Maximum allowable temperature 173°C 343°F
Tripped movement 8 mm ”
Net weight 0.1 kg ¼ lb
How to Order
Example 4102 D 04 C 09 197 -AA Code description Comments
Basic model (A)
Basic model (A) 4102 Brass body Eutectic alloy sensor
Mounting thread (B)
Mounting thread (B)
D ½ - 20 NF
E⅝ - 11 NC
J M14 X 2
M - 24 NF
Installed depth code (C)
Installed depth code (C)1*For installed depth codes available, refer to Tables 1 and 2
on page 4.
Revision level (D)
Revision level (D) C
Fuse rod length code (E)
Fuse rod length code (E)1** For fuse rod length codes available, refer to Tables 3-6 on
pages 4 and 5.
Trip temperature °F (F)
Trip temperature °F (F)
174 174°F 79°C
197 197°F 92°C
217 217°F 103°C
228 228°F 108°C
253 253°F 123°C
291 291°F 144°C
343 343°F 173°C
Customer special requirements (G)
Customer special requirements (G) -AA Standard May be omitted
-** Made-to-order
Use the table below to select the unique specication of your Model 4102 Temperature Detector.
NOTES:
1Consult Tables 3 and 4 for projection lengths, for 4102D/E/J and 4102M respectively, on page 5.

Temp. Detectors for Moving Bearings - Model 4102D/E/J/M
Datasheet_4102_Temperature_Detector_FEB18_Rev3 Page 7
4102M
4102MFigure 2
1”
(44.5) 1”
(28.6)
”
(7.9)
”
(7.9)
”
(6.4)
2 ”
(58.7)
2”
(53.2)
PROJECTION
LENGTH
(See table 4 on
page 5)
”
(22.2)
”
(22.2)
”
(3.2)
R1 ”
(R31.8)
MOUNTING THREAD ”
(19.1) DEEP
LOCKNUT
1 ”
(35.3) MIN. INSTALLED DEPTH
FUSE ROD LENGTH
TRIP TEMPERATURE
STAMPED HERE
FUSE ROD ASSEMBLY NO. 7334X
“I” DRILL
0.272” (6.9) DIA.
BEARING SHELL
”
(22.2)
(2) PORTS ARE ¼PIPE THREADS
(2) MOUNTING HOLES ARE (6.7) DIA
4095 Vent Valve
4395 Electric Switch
PROJECTION
LENGTH
(See table 3 on
page 4)
”
(7.9)
1”
(44.5)
1”
(28.6)
”
(7.9)
”
(22.2)
”
(22.2)
”
(3.2)
”
(7.9)
2 ”
(58.7)
2”
(53.2)
”
(22.2)
1 ”
(35.3)
HOLE DIA.
4102D/J ”(11.5)
4102E ” (13.5)
MOUNTING THREAD ”
(19.1) DEEP
BEARING SHELL
MIN. INSTALLED DEPTH
FUSE ROD LENGTH
TRIP TEMPERATURE
STAMPED HERE
FUSE ROD ASSEMBLY NO. 6702X
(2) PORTS ARE ¼PIPE THREADS
(2) MOUNTING HOLES ARE (6.7) DIA
R1 ”
(R31.8)
4102D/E/J
4095 Vent Valve
4395 Electric Switch
4102 D/E/JFigure 1
Do not heat unrestrained fuse rod assemblies. They re with sufcient force to cause injury.
Dimensions
Dimensions - inches (mm)

Temp. Detectors for Moving Bearings - Model 4102D/E/J/M
Datasheet_4102_Temperature_Detector_FEB18_Rev3 Page 8
Maintenance and Service Parts
Over time, exposure to foreign chemicals and
particulate matter as well as prolonged operation
at extreme conditions may reduce the effectiveness
of the temperature detector. At such time,
AMOT Temperature Detectors can be restored to
original performance by replacing the fuse rod.
Please order a fuse rod assembly and the service
instructions using the part numbers, quantities and
descriptions in the service parts table below. Fuse
rod assemblies
4
should be replaced if the crimp
section becomes loose. The life expectancy of
fuse rod assemblies is ve (5) years, under normal
operating conditions and proper maintenance.
AMOT recommends that the overall safety
system be checked MONTHLY for proper
functioning by simulating an unsafe condition.
AMOT recommends maintenance, including
visual inspections, at the major overhaul of
the engine or YEARLY if lacquering of the lube
oil is observed. Excessive lacquering can
cause sticking which impairs operation.
To test fuse rods, heat a mixture of 50% glycol and
50% water, stirring constantly. Place the fuse rod
in the heated liquid. Use a mercury thermometer
to check the temperature of the liquid. The
fuse rod assembly should trip within 4°F of the
temperature stamped on the bottom of the rod. DO
NOT attempt to resolder a eutectic fuse rod; the rod
expends upon ring.
AMOT designs and tests all its products to ensure
that high quality standards are met. For good
product life, carefully follow AMOT’s installation and
maintenance instructions; failure to do so could
result in damage to the equipment being protected
or controlled.
How to order replacement fuse rod assemblies
Replacement fuse rod assemblies are available
with all of the parts required to service your 4102
Temperature Detector.
In the event that a fuse rod needs to be replaced,
please order the fuse rod assembly and the service
instructions using the part numbers and quantities
given in the service parts table below.
Service parts
Ref
no. Part no. Qty. AMOT part description
4*Refer to table
on page 9* 1 Fuse rod assembly
- ISB-4102-001 1 4102D/E/J/M Installation
and Service Bulletin

Temp. Detectors for Moving Bearings - Model 4102D/E/J/M
Datasheet_4102_Temperature_Detector_FEB18_Rev3 Page 9
Replacement fuse rod assembly model number structure
Use the table below to select the unique specication of your replacement fuse rod assembly.
Example 6702X 11 T 217 Code description
Model code (A)
Model code (A) 6702X 4102D/E/J ONLY
7334X 4102M ONLY
Fuse rod length code (B)
Fuse rod length code (B) * For fuse rod lengths available, refer to Tables 5-6 on page 5.
Type (C)
Type (C) T Temperature
Trip temperature °F (D)
Trip temperature °F (D)
174 174°F 79°C
197 197°F 92°C
217 217°F 103°C
228 228°F 108°C
253 253°F 123°C
291 291°F 144°C
343 343°F 173°C
Maintenance and Service Parts Continued

Temp. Detectors for Moving Bearings - Model 4102D/E/J/M
Datasheet_4102_Temperature_Detector_FEB18_Rev3 Page 10
Contact
Americas Europe, Middle East and Africa
AMOT USA
8824 Fallbrook Dr.
Houston, TX 77064
USA
Tel: [phone]
Fax: [phone]
Email: customer[email protected]
AMOT UK
Western Way
Bury St. Edmunds
Suffolk, IP33 3SZ
England
Tel: [phone]
Fax: [phone]
Email: [email protected]
AMOT Germany
Rondenbarg 25
22525 Hamburg
Germany
Tel: [phone]
Fax: [phone]
Email: [email protected]
Asia Pacic
AMOT Shanghai
Bd. 7A, No. 568, Longpan Rd., Malu Jiading
Shanghai 201801
China
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.amot.com