Nordson AD-31 Series Reference guide

Series AD-31 and Series L4
Extrusion Handguns
Customer Product Manual
Part 107105C04
Issued 5/05
NORDSON CORPORATION •DULUTH, GEORGIA •USA
www.nordson.com

Part 107105C04 E2005 Nordson Corporation
All rights reserved
For CE Declaration, refer to melter documentation.
Nordson Corporation welcomes requests for information, comments, and inquiries about its products. General information
about Nordson can be found on the Internet using the following address: http://www.nordson.com.
Address all correspondence to:
Nordson Corporation
Attn: Customer Service
11475 Lakefield Drive
Duluth, GA 30097
Notice
This is a Nordson Corporation publication which is protected by copyright. Original copyright date 1995.
No part of this document may be photocopied, reproduced, or translated to another language without the prior written
consent of Nordson Corporation. The information contained in this publication is subject to change without notice.
Trademarks
AccuJet, AeroCharge, Apogee, AquaGuard, Asymtek, Automove, Baitgun, Blue Box, CanWorks, Century, CF, Clean Coat, CleanSleeve, CleanSpray,
ColorMax, Control Coat, Coolwave, Cross-Cut, Cyclo-Kinetic, Dispensejet, DispenseMate, DuraBlue, Durafiber, Dura-Screen, Durasystem, Easy Coat,
Easymove Plus, EcoDry, Econo-Coat, e.dot, EFD, ETI, Excel 2000, Fillmaster, FlexiCoat, Flexi-Spray, Flex-O-Coat, Flow Sentry, Fluidmove, FoamMelt,
FoamMix, Heli-flow, Helix, Horizon, Hot Shot, iControl, Isocoil, Isocore, Iso-Flo, Kinetix, Little Squirt, Magnastatic, March, MEG, Meltex, Microcoat,
Micromark, MicroSet, Millennium, Mini Squirt, Mountaingate, MultiScan, Nordson, OptiMix, Package of Values, Pattern View, PermaFlo, Plasmod,
Porous Coat, PowderGrid, Powderware, Printplus, Prism, ProBlue, Pro-Flo, ProLink, Pro-Meter, Pro-Stream, RBX, Rhino, Saturn, Scoreguard, Seal Sentry,
Select Charge, Select Coat, Select Cure, Slautterback, Smart-Coat, Solder Plus, Spectrum, Speed-Coat, SureBead, Sure Coat, Sure-Max, Tracking Plus,
Trends, Tribomatic, Ultrasaver, UpTime, Veritec, VersaBlue, Versa-Coat, Versa-Screen, Versa-Spray, Walcom, Watermark, and When you expect more.
are registered trademarks of Nordson Corporation.
Accubar, Advanced Plasma Systems, AeroDeck, AeroWash, AquaCure, ATS, Auto-Flo, AutoScan, Check Mate, Controlled Fiberization, Control Weave,
CPX, DispensLink, Dry Cure, DuraBraid, DuraCoat, DuraDrum, DuraPail, Easy Clean, Eclipse, E-Nordson, Equi=Bead, ESP, e.Stylized, Fill Sentry, HDLV,
iFlow, iON, Iso-Flex, iTrend, iTRAX, Lacquer Cure, Lean Cell, Maverick, Maxima, MicroFin, MicroMax, Minimeter, Multifil, OptiStroke, PatternPro, PCI,
Powder Pilot, Powercure, Primarc, Process Sentry, Prodigy, Pulse Spray, QuadCure, Ready Coat, Royal Blue, Select Series, Sensomatic, Shaftshield,
SheetAire, Smart, Spectral, Spectronic, Speedking, Spray Works, Summit, Sure Brand, Sure Clean, Sure Wrap, Swirl Coat, Tempus, ThruWave,
Trade Plus, Trak, TrueBlue, Ultra, Ultrasmart, Universal, Vantage, Vista, Web Cure, and 2 Rings (Design)
are trademarks of Nordson Corporation.
Designations and trademarks stated in this document may be brands that, when used by third parties for their own purposes,
could lead to violation of the owners’ rights.

Table of Contents i
Part 107105C04
E2005 Nordson Corporation
Table of Contents
Safety 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Alert Symbols 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Safety Information 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Shutdown 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Safety Warnings and Cautions 3. . . . . . . . . . . . . . . . . . . . . . . . .
Other Safety Precautions 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
First Aid 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Features 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Features 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Handgun Selection 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hose/Gun Connection 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect the Hose 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Connections 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connections for Specific Handgun Configurations 14. . . . . . . . . . . . . . . . . . .
Configuration A: RTD-Style AD-31, Series 5000 14. . . . . . . . . . . . . . . . .
Configuration B: AD-31 RTD Style Other than Series 5000 16. . . . . . . .
Configuration C: Thermostat Style AD-31 18. . . . . . . . . . . . . . . . . . . . . . .
Configuration D: RTD-style L4 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuration E: Thermostat-style L4 22. . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Startup 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shutdown 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Daily Maintenance 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weekly Maintenance 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Required Items 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nozzle Cleaning 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Semiannual Maintenance 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting Table 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
ii
Part 107105C04 E2005 Nordson Corporation
Repair 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace the RTD 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace the Thermostat 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace the Heater Cartridge 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace the Swivel Bearing 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove the Swivel Bearing 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reinstall the Swivel Bearing 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace the Packing Cartridge 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjust the Trigger 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjust the Trigger Electrical Switch 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace an Existing Gun 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove the Existing Handgun 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install the New Handgun 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check for Leaks 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Illustrated Parts Lists 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Handgun Parts Lists 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AD-31 Model K Handgun Parts 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AD-31 Models B and C Handgun Parts 54. . . . . . . . . . . . . . . . . . . . . . . . .
AD-31 Models A, T and TL Handgun Parts 58. . . . . . . . . . . . . . . . . . . . . .
AD-31 Models D, L, E and P Handgun Parts 62. . . . . . . . . . . . . . . . . . . . .
L4 Handgun Parts 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Spare Parts 69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AD-31 Handgun Spare Parts List 69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
L4 Handgun Spare Parts List 70. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extrusion Nozzles 71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Male-Threaded Standard Engagement Nozzles, Small Ball-and-Seat 71
Male-Threaded Extended Engagement Nozzles, Small Ball-and-Seat 71
Male-Threaded Extended Engagement Nozzles, Large Ball-and-Seat 72
Accessories 72. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AD-31 Hand Guns 1
Part 107105C04
E2005 Nordson Corporation
AD-31 Hand Guns
Safety
Read this section before using the equipment. This section contains
recommendations and practices applicable to the safe installation,
operation, and maintenance (hereafter referred to as “use”) of the product
described in this document (hereafter referred to as “equipment”). Additional
safety information, in the form of task-specific safety alert messages,
appears as appropriate throughout this document.
WARNING: Failure to follow the safety messages, recommendations, and
hazard avoidance procedures provided in this document can result in
personal injury, including death, or damage to equipment or property.
Safety Alert Symbols
The following safety alert symbol and signal words are used throughout this
document to alert the reader to personal safety hazards or to identify
conditions that may result in damage to equipment or property. Comply with
all safety information that follows the signal word.
WARNING: Indicates a potentially hazardous situation that, if not avoided,
can result in serious personal injury, including death.
CAUTION: Indicates a potentially hazardous situation that, if not avoided,
can result in minor or moderate personal injury.
CAUTION: (Used without the safety alert symbol) Indicates a potentially
hazardous situation that, if not avoided, can result in damage to equipment
or property.

AD-31 Hand Guns
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Part 107105C04 E2005 Nordson Corporation
Equipment Safety Information
This equipment safety information is applicable to the following types of
Nordson equipment:
Shot melt and cold adhesive application equipment and all related
accessories
Spattern controllers, timers, detection and verification systems, and all
other optional process control devices
Equipment Shutdown
To safely complete many of the procedures described in this document, the
equipment must first be shut down. The level of shut down required varies
by the type of equipment in use and the procedure being completed.
If required, shut down instructions are specified at the start of the
procedure. The levels of shut down are:
Relieving System Hydraulic Pressure
Completely relieve system hydraulic pressure before breaking any hydraulic
connection or seal. Refer to the melter-specific product manual for
instructions on relieving system hydraulic pressure.
De-energizing the System
Isolate the system (melter, hoses, guns, and optional devices) from all
power sources before accessing any unprotected high-voltage wiring or
connection point.
1. Turn off the equipment and all auxiliary devices connected to the
equipment (system).
2. To prevent the equipment from being accidentally energized, lock and
tag the disconnect switch(es) or circuit breaker(s) that provide input
electrical power to the equipment and optional devices.
NOTE: Government regulations and industry standards dictate specific
requirements for the isolation of hazardous energy sources. Refer to the
appropriate regulation or standard.

AD-31 Hand Guns 3
Part 107105C04
E2005 Nordson Corporation
Disabling the Guns
All electrical or mechanical devices that provide an activation signal to the
guns, gun solenoid valve(s), or the melter pump must be disabled before
work can be performed on or around a gun that is connected to a
pressurized system.
1. Turn off or disconnect the gun triggering device (pattern controller, timer,
PLC, etc.).
2. Disconnect the input signal wiring to the gun solenoid valve(s).
3. Reduce the air pressure to the gun solenoid valve(s) to zero; then
relieve the residual air pressure between the regulator and the gun.
General Safety Warnings and Cautions
Table 1 contains the general safety warnings and cautions that apply to
Nordson hot melt and cold adhesive equipment. Review the table and
carefully read all of the warnings or cautions that apply to the type of
equipment described in this manual.
Equipment types are designated in Table 1 as follows:
HM = Hot melt (melters, hoses, guns, etc.)
PC = Process control
CA = Cold adhesive (dispensing pumps, pressurized container, and
guns)

AD-31 Hand Guns
4
Part 107105C04 E2005 Nordson Corporation
General Safety Warnings and Cautions (contd)
Table 1 General Safety Warnings and Cautions
Equipment
Type Warning or Caution
HM
WARNING: Hazardous vapors! Before processing any polyurethane
reactive (PUR) hot melt or solvent-based material through a
compatible Nordson melter, read and comply with the material’s
MSDS. Ensure that the material’s processing temperature and
flashpoints will not be exceeded and that all requirements for safe
handling, ventilation, first aid, and personal protective equipment are
met. Failure to comply with MSDS requirements can cause personal
injury, including death.
HM
WARNING: Reactive material! Never clean any aluminum component
or flush Nordson equipment with halogenated hydrocarbon fluids.
Nordson melters and guns contain aluminum components that may
react violently with halogenated hydrocarbons. The use of
halogenated hydrocarbon compounds in Nordson equipment can
cause personal injury, including death.
HM, CA
WARNING: System pressurized! Relieve system hydraulic pressure
before breaking any hydraulic connection or seal. Failure to relieve
the system hydraulic pressure can result in the uncontrolled release of
hot melt or cold adhesive, causing personal injury.
HM
WARNING: Molten material! Wear eye or face protection, clothing that
protects exposed skin, and heat-protective gloves when servicing
equipment that contains molten hot melt. Even when solidified, hot
melt can still cause burns. Failure to wear appropriate personal
protective equipment can result in personal injury.
HM, PC
WARNING: Equipment starts automatically! Remote triggering
devices are used to control automatic hot melt guns. Before working
on or near an operating gun, disable the gun’s triggering device and
remove the air supply to the gun’s solenoid valve(s). Failure to disable
the gun’s triggering device and remove the supply of air to the
solenoid valve(s) can result in personal injury.
HM, CA, PC
WARNING: Risk of electrocution! Even when switched off and
electrically isolated at the disconnect switch or circuit breaker, the
equipment may still be connected to energized auxiliary devices.
De-energize and electrically isolate all auxiliary devices before
servicing the equipment. Failure to properly isolate electrical power to
auxiliary equipment before servicing the equipment can result in
personal injury, including death.
Continued...

AD-31 Hand Guns 5
Part 107105C04
E2005 Nordson Corporation
Table 1 General Safety Warnings and Cautions (contd)
Equipment
Type Warning or Caution
HM, CA, PC
WARNING: Risk of fire or explosion! Nordson adhesive equipment is
not rated for use in explosive environments and should not be used
with solvent-based adhesives that can create an explosive
atmosphere when processed. Refer to the MSDS for the adhesive to
determine its processing characteristics and limitations. The use of
incompatible solvent-based adhesives or the improper processing of
solvent-based adhesives can result in personal injury, including death.
HM, CA, PC
WARNING: Allow only personnel with appropriate training and
experience to operate or service the equipment. The use of untrained
or inexperienced personnel to operate or service the equipment can
result in injury, including death, to themselves and others and can
damage to the equipment.
HM
CAUTION: Hot surfaces! Avoid contact with the hot metal surfaces of
guns, hoses, and certain components of the melter. If contact can not
be avoided, wear heat-protective gloves and clothing when working
around heated equipment. Failure to avoid contact with hot metal
surfaces can result in personal injury.
HM
CAUTION: Some Nordson melters are specifically designed to
process polyurethane reactive (PUR) hot melt. Attempting to process
PUR in equipment not specifically designed for this purpose can
damage the equipment and cause premature reaction of the hot melt.
If you are unsure of the equipment’s ability to process PUR, contact
your Nordson representative for assistance.
HM, CA
CAUTION: Before using any cleaning or flushing compound on or in
the equipment, read and comply with the manufacturer’s instructions
and the MSDS supplied with the compound. Some cleaning
compounds can react unpredictably with hot melt or cold adhesive,
resulting in damage to the equipment.
HM
CAUTION: Nordson hot melt equipment is factory tested with
Nordson Type R fluid that contains polyester adipate plasticizer.
Certain hot melt materials can react with Type R fluid and form a solid
gum that can clog the equipment. Before using the equipment,
confirm that the hot melt is compatible with Type R fluid.

AD-31 Hand Guns
6
Part 107105C04 E2005 Nordson Corporation
Other Safety Precautions
SDo not use an open flame to heat hot melt system components.
SCheck high pressure hoses daily for signs of excessive wear, damage,
or leaks.
SNever point a dispensing handgun at yourself or others.
SSuspend dispensing handguns by their proper suspension point.
First Aid
If molten hot melt comes in contact with your skin:
1. Do NOT attempt to remove the molten hot melt from your skin.
2. Immediately soak the affected area in clean, cold water until the hot melt
has cooled.
3. Do NOT attempt to remove the solidified hot melt from your skin.
4. In case of severe burns, treat for shock.
5. Seek expert medical attention immediately. Give the MSDS for the hot
melt to the medical personnel providing treatment.

AD-31 Hand Guns 7
Part 107105C04
E2005 Nordson Corporation
Description
Series AD-31 and Series L4 extrusion handguns feature an ever-cool
handle with no heated components or adhesive-flow paths. Heated gun
components are completely enclosed within the exterior gun shell.
Î
Î
Î
Î
ÏÏ
ÏÏ
ÏÏ
Ï
Ï
1
234
6
7
9
10
11
12
13
15
16
8
5
14
Figure 1 Typical Extrusion Handgun Assembly
1. Nozzle
2. Gun body
3. Trigger linkage
4. Ground screw
5. Trigger lock
6. Trigger
7. Gun handle shells
8. Switch plug assembly (B, C, and K
guns only)
9. Pivot sleeve shells
10. Swivel connector
11. Thrust bearing
12. Pivot sleeve
13. Wire retaining clip
14. RTD terminal block or
thermostat
15. Heater terminal block
16. Thermostat (L4 guns only)
An impact-resistant molded shell ensures an extended service life. Guns
features a 360-degree swivel connector to eliminate hose twisting.
Handguns use either a preset temperature sensor or an RTD (resistance
temperature detector) sensor. RTD sensing reduces temperature
fluctuations that affect flow and cause char formation. A wide operating
range of 65 to 230 _C (150 to 450 _F) provides additional application
versatility. RTD-style L4 guns have thermostats that are wired in series with
the heaters.
For handling very thick adhesive, the AD-31 LBS extrusion handgun
incorporates a large ball-and-seat and larger flow paths.

AD-31 Hand Guns
8
Part 107105C04 E2005 Nordson Corporation
Standard Features
Standard features on AD-31 and L4 extrusion handguns include:
Scompact and lightweight design
Sever-cool handle design
Scompatibility with varying hose diameters
S360-degree hose swivel for easy application without hose twisting
Ssafety lock on trigger
Optional Features
The following features are available with various extrusion handgun models:
SRTD sensing available on AD-31 handgun models B, C, K, T, and TL
and some L4 handguns. Refer to Tables 2, 3, 4, and 5.
Smicroswitch for handgun models used with Series 5000 drum melters or
gear-pump driven melters, available on AD-31 handgun models B, C,
and K and some L4 handguns. Refer to Tables 2 and 3.
SLBS version for handling very thick adhesive, available on AD-31
handgun models B and K. Refer to Table 4.
Specifications
Table 2 AD-31 Handgun Specifications
Parameter Value
Type of Pattern Bead
Maximum operating temperature 230 _C (450 _F)
Maximum hydraulic pressure 10.34 mPa (1500 psi)
Nozzle orifice diameters:
Sstandard
Sextended
S0.51 to 2.36 mm
(0.020 to 0.093 in.)
S.64 to 3.96 mm
(0.025 to 0.156 in.)
Electrical requirements 100; 115; 120; 200; 220/240 VAC,
50/60 Hz
Weight 0.8 kg (1.75 lb)
Dimensions L x D x W mm (in.): 187.5 x 160.3 x 41.1
(7.38 x 6.31 x 1.62)

AD-31 Hand Guns 9
Part 107105C04
E2005 Nordson Corporation
Table 3 L4 Handgun Specifications
Parameter Value
Type of pattern Bead
Adhesive viscosity 25,000 cps maximum
Weight 0.8 kg (1.75 lb)
Dimensions L x D x W mm (in.) 187.5 x 160.3 x 41.1
(7.38 x 6.31 x 1.62)
Operating temperature 37−230 _C (100−446 _F)
Storage temperature -30−70 _C (-22−158 _F)
Warm-up time 30−45 min
Operating pressure 10.34 kPa (500 psi) maximum
Input voltage 115 VAC. 50/60 Hz or
230 VAC, 50/60 Hz
Power requirements 80 W
Heater type Replaceable cartridge
RTD type (if applicable) 100-ohm platinum
Temperature control Fixed, bimetallic thermostat with
values from 93−218 _C
(200−425 _F) or
RTD sensor in gun with controller in
melter, adjustable from 37−230 _C
(100−450 _F)

AD-31 Hand Guns
10
Part 107105C04 E2005 Nordson Corporation
Handgun Selection
Table 4 AD-31 Handgun Selection Chart
Equipment
Model Part No. Gun Model
Hose
Diameter
(in.)
Seat Voltage Wattage Sensor Type
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
DuraBlue
ÁÁÁÁ
ÁÁÁÁ
307712C
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
AD-31T
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
5/16
ÁÁÁ
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
ÁÁÁ
SBS
ÁÁÁÁ
ÁÁÁÁ
120
ÁÁÁÁ
Á
ÁÁ
Á
Á
ÁÁ
Á
Á
ÁÁ
Á
Á
ÁÁ
Á
Á
ÁÁ
Á
ÁÁÁÁ
80
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
Á
ÁÁÁÁÁ
Á
Á
ÁÁÁÁÁ
Á
Á
ÁÁÁÁÁ
Á
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
RTD
ÁÁÁÁ
ÁÁÁÁ
725953B
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
AD-31STR-WP
ÁÁÁÁ
ÁÁÁÁ
120
ÁÁÁÁ
ÁÁÁÁ
274765C
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
AD-31T
ÁÁÁÁ
ÁÁÁÁ
240
ÁÁÁÁ
ÁÁÁÁ
174933
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
AD-31T-PA
ÁÁÁÁ
ÁÁÁÁ
240
ÁÁÁÁ
ÁÁÁÁ
274752C
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
AD-31TL
ÁÁÁÁ
ÁÁÁÁ
200
ÁÁÁÁ
ÁÁÁÁ
175299C
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
AD-31TL-PA
ÁÁÁÁ
ÁÁÁÁ
200
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
2300, 3000,
6000, FM130,
and FM170
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
274765A
274752A
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
AD-31T
AD-31TL
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
5/16
5/16
ÁÁÁ
Á
Á
Á
ÁÁÁ
SBS
SBS
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
240
200
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
80
80
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
RTD
RTD
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
2000
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
272790A
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
AD-31D
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
5/16
ÁÁÁ
Á
Á
Á
ÁÁÁ
SBS
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
230
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
60
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
190 _C (375 _F)
thermostat
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
274419A
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
AD-31L
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
5/16
ÁÁÁ
Á
Á
Á
ÁÁÁ
SBS
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
200
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
60
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
190 _C (375 _F)
thermostat
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
Roman
Numerals
(except
Model X)
ÁÁÁÁ
Á
ÁÁ
Á
Á
ÁÁ
Á
ÁÁÁÁ
271612
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
AD-341A
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
1/4
ÁÁÁ
Á
Á
Á
Á
Á
Á
ÁÁÁ
SBS
ÁÁÁÁ
Á
ÁÁ
Á
Á
ÁÁ
Á
ÁÁÁÁ
230
ÁÁÁÁ
Á
ÁÁ
Á
Á
ÁÁ
Á
ÁÁÁÁ
60
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
190 _C (375 _F)
thermostat
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
5000
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
271644
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
AD-31B
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
5/8
ÁÁÁ
Á
Á
Á
ÁÁÁ
LBS
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
230
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
60
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
190 _C (375 _F)
thermostat
ÁÁÁÁ
ÁÁÁÁ
336241
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
AD-31B
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
5/8
ÁÁÁ
ÁÁÁ
LBS
ÁÁÁÁ
ÁÁÁÁ
230
ÁÁÁÁ
ÁÁÁÁ
80
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
RTD
ÁÁÁÁ
ÁÁÁÁ
111354A
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
AD-31C
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
5/16
ÁÁÁ
ÁÁÁ
SBS
ÁÁÁÁ
ÁÁÁÁ
230
ÁÁÁÁ
ÁÁÁÁ
80
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
RTD
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
271645
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
AD-31C
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
5/16
ÁÁÁ
Á
Á
Á
ÁÁÁ
SBS
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
230
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
60
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
190 _C (375 _F)
thermostat
ÁÁÁÁ
ÁÁÁÁ
121325A
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
AD-31K
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
5/16
ÁÁÁ
ÁÁÁ
LBS
ÁÁÁÁ
ÁÁÁÁ
230
ÁÁÁÁ
ÁÁÁÁ
80
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
RTD
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
276577
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
AD-31K
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
5/16
ÁÁÁ
Á
Á
Á
ÁÁÁ
LBS
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
230
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
60
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
190 _C (375 _F)
thermostat
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
113183
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
AD-31K
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
5/16
ÁÁÁ
Á
Á
Á
ÁÁÁ
LBS
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
230
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
60
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
65 _C (150 _F)
thermostat
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
Model 115
and Hot Shot
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
276028
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
AD-31E
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
5/16
ÁÁÁ
Á
Á
Á
ÁÁÁ
SBS
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
100
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
65
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
190 _C (375 _F)
thermostat
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Model 115A
ÁÁÁÁ
ÁÁÁÁ
274940
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
AD-31P
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
5/16
ÁÁÁ
ÁÁÁ
SBS
ÁÁÁÁ
ÁÁÁÁ
100
ÁÁÁÁ
ÁÁÁÁ
65
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
190 _C (375 _F)
thermostat
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
Model 115B
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
276799
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
AD-31D
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
5/16
ÁÁÁ
Á
Á
Á
ÁÁÁ
SBS
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
230
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
60
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
190 _C (375 _F)
thermostat
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
NOTE A: Used with hoses that have corrugated plastic outer covers.
B: Used with polyamide materials.
C: Used with hoses having corrugated covers.

AD-31 Hand Guns 11
Part 107105C04
E2005 Nordson Corporation
Table 5 L4 Handgun Selection Chart (See Note A)
Equipment
Model Part No. O-Ring Switched/ Unswitched Voltage Wattage Sensor
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
Former
Slautterback
units
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
182032
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
Viton
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
Unswitched
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
115
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
80
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
190 _C (375 _F)
thermostat
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
182033
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
Viton
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
Unswitched
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
230
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
80
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
190 _C (375 _F)
thermostat
ÁÁÁÁÁ
ÁÁÁÁÁ
182034
ÁÁÁÁÁ
ÁÁÁÁÁ
Viton
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Switched
ÁÁÁÁ
ÁÁÁÁ
115
ÁÁÁÁÁ
ÁÁÁÁÁ
80
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
RTD (see Note B)
ÁÁÁÁÁ
ÁÁÁÁÁ
182035
ÁÁÁÁÁ
ÁÁÁÁÁ
Viton
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Switched
ÁÁÁÁ
ÁÁÁÁ
230
ÁÁÁÁÁ
ÁÁÁÁÁ
80
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
RTD (see Note B)
ÁÁÁÁÁ
ÁÁÁÁÁ
1020528
ÁÁÁÁÁ
ÁÁÁÁÁ
Viton
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Unswitched
ÁÁÁÁ
ÁÁÁÁ
115
ÁÁÁÁÁ
ÁÁÁÁÁ
80
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
RTD (see Note B)
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
1020529
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
Viton
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
Unswitched
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
115
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
80
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
149 _C (300 _F)
thermostat
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
1020530
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
Viton
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
Unswitched
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
230
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
80
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
177 _C (350 _F)
thermostat
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
1020533
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
Kalrez
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
Unswitched
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
230
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
80
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
218 _C (425 _F)
thermostat
ÁÁÁÁÁ
ÁÁÁÁÁ
1020534
ÁÁÁÁÁ
ÁÁÁÁÁ
Viton
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Unswitched
ÁÁÁÁ
ÁÁÁÁ
230
ÁÁÁÁÁ
ÁÁÁÁÁ
80
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
RTD (see Note B)
ÁÁÁÁÁ
ÁÁÁÁÁ
1020535
ÁÁÁÁÁ
ÁÁÁÁÁ
Kalrez
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Unswitched
ÁÁÁÁ
ÁÁÁÁ
230
ÁÁÁÁÁ
ÁÁÁÁÁ
80
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
RTD (see Note B)
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
1020536
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
Viton
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
Switched
ÁÁÁÁ
Á
ÁÁ
Á
ÁÁÁÁ
115
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
80
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
190 _C (375 _F)
thermostat
ÁÁÁÁÁ
ÁÁÁÁÁ
1020538
ÁÁÁÁÁ
ÁÁÁÁÁ
Viton
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Switched
ÁÁÁÁ
ÁÁÁÁ
230
ÁÁÁÁÁ
ÁÁÁÁÁ
80
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
190 _C (375 _F)
thermostat
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
NOTE A: All L4 handguns have a small ball-and-seat configuration and are standard bottom-feed only.
B: All RTD-controlled L4 handguns have a 218 _C (450 _F) thermostat for overtemperature protection and
100-ohm platinum RTDs.
Installation
WARNING: Allow only qualified personnel to perform the following tasks.
Follow the safety instructions in this document and all other related
documentation.
This section provides safety and installation information for installing
handguns.

AD-31 Hand Guns
12
Part 107105C04 E2005 Nordson Corporation
Hose/Gun Connection
WARNING: Hot! Risk of burns. Wear heat-protective clothing, safety
goggles, and heat-protective gloves.
Connect the Hose
Handguns are shipped fully assembled. To connect the hose to the
handgun, partially disassemble the handgun.
1. With a Phillips screwdriver, remove the screws that secure the pilot
sleeve shells.
NOTE: Figure 2 shows a typical handgun. Details may vary depending
upon the gun model.
2. Remove the cap plug on the swivel connector.
CAUTION: Align each set of electrical wires exiting the hose with a groove
on the pivot sleeve. Failure to do so can damage the wires, resulting in an
electrical short. See Figure 3.
Figure 2 Remove Pivot Sleeve
Shells (typical gun
shown)
ÂÂÂÂ
ÂÂÂÂ
ÂÂÂÂ
ÂÂÂÂ
ÂÂÂÂ
ÂÂÂÂ
ÂÂÂÂ
ÂÂÂÂ
Figure 3 Proper Wire Alignment

4203011
ÌÌ
AD-31 Hand Guns 13
Part 107105C04
E2005 Nordson Corporation
NOTE: Handguns with a thermostatic sensor use only one set of electrical
wires.
3. See Figure 4. Attach the hose fitting to the swivel connector, and tighten
using two wrenches. Place a 20-mm (3/4-in.) wrench on the wing of the
swivel connector, and tighten the hose fitting using the 18-mm (11/16-in.)
wrench.
Figure 4 Attach the Hose to the
Handgun (electrical
connections not shown
for clarity)
CAUTION: An electric short can occur if wires do not lie flat and side by
side, not crossing each other within the groove.
ÂÂÂ
ÂÂÂ
ÂÂÂ
ÂÂÂ
Figure 5 Secure the Wires with the Retaining Clip
4. See Figure 5. Rotate the wire retaining clip around the pivot sleeve so
that the clip’s opening aligns with one of the grooves on the pivot sleeve.
5. Place one set of wires into the groove and rotate the wire retaining clip
so that it holds the wires securely in the groove. For handguns with
electrical configurations A or B (refer to Table 6), repeat steps 4 and 5 to
secure the other set of wires.

AD-31 Hand Guns
14
Part 107105C04 E2005 Nordson Corporation
Electrical Connections
Before connecting the hose to the melter, make electrical connections as
described in the following procedures.
Connections for Specific Handgun Configurations
To make the electrical connections for the handgun, refer to the appropriate
procedure shown in Table 6.
Table 6 Correct Electrical Connection Procedure for Each Handgun Model
Handgun Model Sensor Type Refer to...
AD-31 RTD (for use with a Series 5000 melter) Configuration A (RTD-Style AD-31,
Series 5000)
RTD (for use with any melter other than
a Series 5000 melter)
Configuration B (RTD-Style AD-31,
Other Than Series 5000)
Thermostat Configuration C (Thermostat-Style
AD-31)
L4 RTD Configuration D (RTD-Style L4
Handgun)
Thermostat Configuration E (Thermostat-Style L4
Handgun)
Configuration A: RTD-Style AD-31, Series 5000
Connect the RTD Sensor
Refer to the Figure 6 as necessary.
Heater
Heater
Block
RTD
Terminal
Block
L1, Heater (Wire J)
L2, Heater (Wire L)
RTD (Wire I)
RTD (Wire B)
Ground
Terminal
RTD (Wire H)
RTD
Figure 6 Wiring Diagram
1. Loosen the three screws from the RTD terminal block as shown in
Figure 7. Insert wires I, H, and B, extending from the hose, into the RTD
terminal block.

AD-31 Hand Guns 15
Part 107105C04
E2005 Nordson Corporation
Figure 7 Connect the RTD
2. Tighten the three terminal-block screws to 0.42 N•m (3.7 in.-lb). Do not
overtighten.
3. Remove the ground screw from the pivot sleeve.
WARNING: Electrical shock hazard exists if hose ground wire is not
secured tightly to the gun body.
4. Secure the ground wire to the RTD side of the pivot sleeve. Do not
overtighten.
Connect the Heater
1. On the heater side of the pivot sleeve, loosen the two screws on the
heater terminal block as shown in Figure 8. Insert wires L and J,
extending from the hose, into the terminal block.
ÌÌÌ
ÌÌÌ
ÌÌÌ
ÌÌÌ
L
J
ÌÌÌÌ
ÌÌÌÌ
ÌÌÌÌ
Figure 8 Connect the Heater
2. Tighten the two terminal-block screws to 0.42 N•m (3.7 in.-lb). Do not
overtighten.
CAUTION: Do not pinch wires between the shells and the pivot sleeve. An
electrical short can occur.
3. Replace the pivot sleeve shells and secure with screws.

ÌÌ
ÌÌ
AD-31 Hand Guns
16
Part 107105C04 E2005 Nordson Corporation
Electrical Switch Connections (if applicable)
1. Find the orientation lug on the hose-cordset connector and ensure that
the connector and switch plug at the bottom of the handgun’s handle are
properly aligned.
2. Attach the switch plug assembly at the bottom of the handle to the
connector on the hose cordset.
3. Refer to the melter manual to complete the hose installation to the
melter.
Figure 9 Connect the Electrical
Switch
Configuration B: AD-31 RTD Style Other than Series
5000
Connecting the RTD Sensor
Refer to Figure 10 as necessary.
Heater RTD
Heater
Block
RTD
Terminal
Block
L1, Heater (Wire 1)
L2, Heater (Wire 2)
RTD (Wire 5)
RTD (Wire 3)
Ground
Terminal
Figure 10 Wiring Diagram
1. Loosen the two screws from the RTD terminal block as shown in Figure
11. Insert wires 3 and 5, extending from the hose, into the terminal
block.