Nordson NH-4 Reference guide

NH-4 Heaters
Customer Product Manual
Document Number1602369-05
Issued 05/23
For parts and technical support, call the Industrial Coating
Systems Customer Support Center at [phone] or
contact your local Nordson representative.
This document is subject to change without notice.
Check http://emanuals.nordson.com for the latest version.
NORDSON CORPORATION • AMHERST, OHIO • USA

© 2023 Nordson Corporation
1602369-05
Contact Us
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
555 Jackson Street
Amherst, OH 44001
Notice
This is a Nordson Corporation publication which is protected by copyright.
Original copyright date 2013. 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
Nordson and the Nordson logo are registered trademarks of Nordson
Corporation. All other trademarks are the property of their respective owners.
Table of Contents
Safety............................................................................................................................................... 1
Introduction...................................................................................................................................... 1
Qualied Personnel ......................................................................................................................... 1
Intended Use ................................................................................................................................... 1
Regulations and Approvals.............................................................................................................. 1
Personal Safety ............................................................................................................................... 2
High-Pressure Fluids...................................................................................................................... 3
Fire Safety ....................................................................................................................................... 4
Halogenated Hydrocarbon Solvent Hazards.................................................................................. 4
Action in the Event of a Malfunction ................................................................................................ 5
Disposal........................................................................................................................................... 5
Description...................................................................................................................................... 6
Theory of Operation......................................................................................................................... 7
Identifying Groups of Heaters.......................................................................................................... 7
NH-4 Heater Versions...................................................................................................................... 8
Installation....................................................................................................................................... 8
Location and Mounting .................................................................................................................... 8
Electrical.......................................................................................................................................... 9
Fluid Lines and Fittings.................................................................................................................. 10
Multiple Heater Installations ...........................................................................................................11
Thermometer Installation............................................................................................................... 12
Filter Installation ............................................................................................................................ 13
Thermostat Adjustment — Single Heater Installation.................................................................... 13
Thermostat Adjustment — Multiple Heater Installations................................................................ 13
Operation....................................................................................................................................... 14
Safety Precautions ........................................................................................................................ 14
Startup........................................................................................................................................... 14
Thermostat Adjustments................................................................................................................ 15
Shutdown....................................................................................................................................... 15
Daily Maintenance......................................................................................................................... 16
Troubleshooting............................................................................................................................ 17
Repair............................................................................................................................................. 18
Thermostat Replacement .............................................................................................................. 18
Thermostat Removal.................................................................................................................... 18
Thermostat Installation................................................................................................................. 18
Heat Limiter Replacement............................................................................................................. 20
Heater Cartridge Replacement...................................................................................................... 20
Fluid Heating Reservoir Replacement........................................................................................... 20
Fluid Heating Reservoir Removal................................................................................................. 21
High Pressure Housing Removal − Standard Heaters Only ........................................................ 22
Fluid Heating Reservoir Installation.............................................................................................. 22

© 2023 Nordson Corporation 1602369-05
Parts............................................................................................................................................... 23
Heater Reference Chart ................................................................................................................ 23
Standard NH-4 Heaters................................................................................................................. 24
200 Volt: Single Passage — Japan Only — 1700 watt ................................................................ 24
230 Volt: Single Passage — 1700 watt ........................................................................................ 26
380 Volt: Single Passage — 1700 watt ........................................................................................ 28
460 Volt: Single — 1700 watt ....................................................................................................... 30
Stainless Steel NH-4 Heaters........................................................................................................ 32
115 Volt: Single Passage — 1700 watt ........................................................................................ 32
200 Volt: Single Passage — Japan Only — 1700 watt ................................................................ 34
230 Volt: Single Passage — 1700 watt ........................................................................................ 36
380 Volt: Single Passage — 1700 watt ........................................................................................ 38
460 Volt: Single Passage − 1700 watt.......................................................................................... 39
OBSOLETE NH-4 Heaters ............................................................................................................ 40
115 Volt: Single Passage — 1700 watts (OBSOLETE)................................................................ 40
115 Volt: Twin Passage — 500 watts (OBSOLETE) .................................................................... 42
115 Volt: Twin Passage — 1000 watts (OBSOLETE) .................................................................. 44
200 Volt: Single and Twin Passage — 1700 watt (OBSOLETE) .................................................. 46
200 Volt: Twin Passage — Japan Only — 1700 watt (OBSOLETE) ............................................ 48
230 Volt: Single Passage — 1700 watt - OBSOLETE.................................................................. 50
230 Volt: Twin Passage — 1000 watt (OBSOLETE) .................................................................... 52
230 Volt: Twin Passage — 1700 watt (OBSOLETE) .................................................................... 54
380 Volt: Single Passage and Twin Passage — 1700 watt (OBSOLETE) ................................... 56
460 Volt: Single and Twin Passage — 1700 watt - (OBSOLETE)................................................ 58
230 Volt: Single Passage — 1700 watt (OBSOLETE) ................................................................. 60
460 Volt: Single Passage − 1700 watt (OBSOLETE)................................................................... 61
Kits and Spare Parts...................................................................................................................... 62
Standard NH-4 Thermostat/Heat Limiter Kit................................................................................. 62
Standard NH-4 Thermostat Kit..................................................................................................... 62
Stainless Steel NH-4 Thermostat/Heat Limiter Kit ....................................................................... 62
External Adjust Kit (OBSOLETE) ................................................................................................. 63
Manual Reset Thermostat Kit — Japan Only............................................................................... 63
Standard NH-4 Single Passage Fluid Reservoir Seal Kit............................................................. 63
Standard NH-4 Twin Passage Fluid Reservoir Seal Kit ............................................................... 63
Stainless Steel Alternate Fitting.................................................................................................... 63
Heater Cartridges (Standard and Stainless Steel Heaters).......................................................... 64
Recommended Spare Parts .......................................................................................................... 64

© 2023 Nordson Corporation
1602369-05

i
Change Record
© 2023 Nordson Corporation 1602369-05
Change Record
Revision Date Change
01 02/13 Released
02 03/17 Updated DOC and labels.
03 02/20 Added NH-4 heaters to parts list: 1617936, 1617938, 1617937, 1617939.
04 09/21 Updated DOC and labels.
05 05/23 Updated part numbers.

© 2023 Nordson Corporation
1602369-05
ii Change Record

1
NH-4 Heaters
© 2023 Nordson Corporation 1602369-05
Safety
Introduction
Read and follow these safety instructions. Task- and equipment-specic warnings,
cautions, and instructions are included in equipment documentation where appropriate.
Make sure all equipment documentation, including these instructions, is accessible to
persons operating or servicing equipment.
Qualied Personnel
Equipment owners are responsible for making sure that Nordson equipment is installed,
operated, and serviced by qualied personnel. Qualied personnel are those employees
or contractors who are trained to safely perform their assigned tasks. They are familiar
with all relevant safety rules and regulations and are physically capable of performing
their assigned tasks.
Intended Use
Use of Nordson equipment in ways other than those described in the documentation
supplied with the equipment may result in injury to persons or damage to property.
Some examples of unintended use of equipment include:
• using incompatible materials
• making unauthorized modications
• removing or bypassing safety guards or interlocks
• using incompatible or damaged parts
• using unapproved auxiliary equipment
• operating equipment in excess of maximum ratings
Regulations and Approvals
Make sure all equipment is rated and approved for the environment in which it is
used. Any approvals obtained for Nordson equipment will be voided if instructions for
installation, operation, and service are not followed.

2NH-4 Heaters
© 2023 Nordson Corporation
1602369-05
Personal Safety
To prevent injury follow these instructions.
• Do not operate or service equipment unless you are qualied.
• Do not operate equipment unless safety guards, doors, or covers are intact and
automatic interlocks are operating properly. Do not bypass or disarm any safety
devices.
• Keep clear of moving equipment. Before adjusting or servicing moving equipment,
shut o󰀨 the power supply and wait until the equipment comes to a complete stop.
Lock out power and secure the equipment to prevent unexpected movement.
• Relieve (bleed o󰀨) hydraulic and pneumatic pressure before adjusting or servicing
pressurized systems or components. Disconnect, lock out, and tag switches before
servicing electrical equipment.
• While operating manual spray guns, make sure you are grounded. Wear electrically
conductive gloves or a grounding strap connected to the gun handle or other true earth
ground. Do not wear or carry metallic objects such as jewelry or tools.
• If you receive even a slight electrical shock, shut down all electrical or electrostatic
equipment immediately. Do not restart the equipment until the problem has been
identied and corrected.
• Obtain and read Safety Data Sheets (SDS) for all materials used. Follow the
manufacturer’s instructions for safe handling and use of materials, and use
recommended personal protection devices.
• Make sure the spray area is adequately ventilated. To prevent injury, be aware of less-
obvious dangers in the workplace that often cannot be completely eliminated, such as
hot surfaces, sharp edges, energized electrical circuits, and moving parts that cannot
be enclosed or otherwise guarded for practical reasons.

3
NH-4 Heaters
© 2023 Nordson Corporation 1602369-05
High-Pressure Fluids
High-pressure uids, unless they are safely contained, are extremely hazardous. Always
relieve uid pressure before adjusting or servicing high pressure equipment. A jet of
high-pressure uid can cut like a knife and cause serious bodily injury, amputation, or
death. Fluids penetrating the skin can also cause toxic poisoning.
If you su󰀨er a uid injection injury, seek medical care immediately. If possible, provide a
copy of the SDS for the injected uid to the health care provider.
The National Spray Equipment Manufacturers Association has created a wallet card that
you should carry when you are operating high-pressure spray equipment. These cards
are supplied with your equipment. The following is the text of this card:
WARNING:Any injury caused by high pressure liquid can be serious. If you are injured
or even suspect an injury:
• Go to an emergency room immediately.
• Tell the doctor that you suspect an injection injury.
• Show them this card
• Tell them what kind of material you were spraying
MEDICAL ALERT — AIRLESS SPRAY WOUNDS: NOTE TO PHYSICIAN
Injection in the skin is a serious traumatic injury. It is important to treat the injury
surgically as soon as possible. Do not delay treatment to research toxicity. Toxicity is a
concern with some exotic coatings injected directly into the bloodstream.
Consultation with a plastic surgeon or a reconstructive hand surgeon may be advisable.
The seriousness of the wound depends on where the injury is on the body, whether the
substance hit something on its way in and deected causing more damage, and many
other variables including skin microora residing in the paint or gun which are blasted into
the wound. If the injected paint contains acrylic latex and titanium dioxide that damage
the tissue’s resistance to infection, bacterial growth will ourish. The treatment that
doctors recommend for an injection injury to the hand includes immediate decompression
of the closed vascular compartments of the hand to release the underlying tissue
distended by the injected paint, judicious wound debridement, and immediate antibiotic
treatment.

4NH-4 Heaters
© 2023 Nordson Corporation
1602369-05
Fire Safety
To avoid a re or explosion, follow these instructions.
• Ground all conductive equipment. Use only grounded air and uid hoses. Check
equipment and workpiece grounding devices regularly. Resistance to ground must not
exceed one megohm.
• Shut down all equipment immediately if you notice static sparking or arcing. Do not
restart the equipment until the cause has been identied and corrected.
• Do not smoke, weld, grind, or use open ames where ammable materials are being
used or stored. Do not heat materials to temperatures above those recommended
by the manufacturer. Make sure heat monitoring and limiting devices are working
properly.
• Provide adequate ventilation to prevent dangerous concentrations of volatile particles
or vapors. Refer to local codes or your material SDS for guidance.
• Do not disconnect live electrical circuits when working with ammable materials. Shut
o󰀨 power at a disconnect switch rst to prevent sparking.
• Know where emergency stop buttons, shuto󰀨 valves, and re extinguishers are
located. If a re starts in a spray booth, immediately shut o󰀨 the spray system and
exhaust fans.
• Shut o󰀨 electrostatic power and ground the charging system before adjusting,
cleaning, or repairing electrostatic equipment.
• Clean, maintain, test, and repair equipment according to the instructions in your
equipment documentation.
• Use only replacement parts that are designed for use with original equipment. Contact
your Nordson representative for parts information and advice.
Halogenated Hydrocarbon Solvent Hazards
Do not use halogenated hydrocarbon solvents in a pressurized system that contains
aluminum components. Under pressure, these solvents can react with aluminum and
explode, causing injury, death, or property damage. Halogenated hydrocarbon solvents
contain one or more of the following elements:
Element Symbol Prex
Fluorine F “Fluoro-”
Chlorine Cl “Chloro-”
Bromine Br “Bromo-”
Iodine I “Iodo-”
Check your material SDS or contact your material supplier for more information. If you
must use halogenated hydrocarbon solvents, contact your Nordson representative for
information about compatible Nordson components.

5
NH-4 Heaters
© 2023 Nordson Corporation 1602369-05
Action in the Event of a Malfunction
If a system or any equipment in a system malfunctions, shut o󰀨 the system immediately
and perform the following steps:
• Disconnect and lock out system electrical power. Close hydraulic and pneumatic
shuto󰀨 valves and relieve pressures.
• Identify the reason for the malfunction and correct it before restarting the system.
Disposal
Dispose of equipment and materials used in operation and servicing according to local
codes.

6NH-4 Heaters
© 2023 Nordson Corporation
1602369-05
Description
The Model NH-4 heaters are electrically operated, explosion-proof, high-pressure uid
heaters, designed for use with both air and airless spray systems.
Model NH-4 Heater
P/N
S/N
Volts AC
Watts
Amperes
Phase
PSI BAR
Nordson Cororation Amherst Ohio 44001 USA
G
0598
BAS00ATEX2170
WARNING
DO NOT OPEN WHEN
ENERGIZED OR WHEN
EXPLOSIVE ATMOSPHERE
IS PRESENT
BAS21UKEX0335
1180
6
1
2
3
4
Figure 1 NH-4 ATEX Heaters
1. Enclosure cover
2. Fluid outlet
3. High-pressure housing
4. Fluid inlet
5. Fluid passage body
6. Electrical enclosure
See Figure 1. The standard NH-4 heater is available in both aluminum and stainless steel
versions. Refer to the Parts section for a complete listing of available heaters.
The heater can be wall or dolly mounted. The heater consists of an electrical enclosure
(6) and a uid section. The electrical enclosure contains a thermostat adjustment for the
heater. Most versions of the NH-4 heater have internal thermostat controls so you must
remove the enclosure cover (1) in order to change the setting.
The uid section consists of a uid passage body (5) and high-pressure housing (3). The
thermostat probe, heater cartridge, and heat limiter are located within the uid passage
body.

7
NH-4 Heaters
© 2023 Nordson Corporation 1602369-05
Theory of Operation
See Figure 2. The heater cartridge heats the uid passage body (6). Coating material
ows through the inlet port (4) and the spiral passages in the uid passage body where it
is heated then exits through the outlet port (8).
An adjustable thermostat (7) controls the temperature. If the thermostat fails, causing an
over-temperature condition, the heat limiter (1) will sense the excess heat and open the
circuit to the heater cartridge, shutting down the heater.
8
7
6
5
4
1
2
3
Figure 2 Cutaway View of Heater Components
1. Heat limiter
2. Spiral grooves
3. Heater cartridge
4. Inlet port
5. High-pressure housing
6. Fluid passage body
7. Thermostat
8. Outlet port
Identifying Groups of Heaters
This manual covers di󰀨erent types of NH-4 heaters. When procedures or data di󰀨ers, the
following codes will be used:
[EXT ADJ]—This code is used for NH-4 heaters that have an external adjustable
thermostat control.
[INT ADJ]—This code is used for NH-4 heaters that have an internal adjustable
thermostat control.
[ST STL]—This code is used for stainless steel NH-4 heaters.

8NH-4 Heaters
© 2023 Nordson Corporation
1602369-05
NH-4 Heater Versions
Refer to the Parts section for descriptions, specications, and part numbers of available
NH-4 heaters.
Installation
WARNING:Allow only qualied personnel to perform the following tasks. Follow the
safety instructions in this document and all other related documentation.
WARNING:All EX approved heaters have a torque specication for the enclosure cover
bolts of 1.11−1.66 kg•m (8−12 ft-lbs). Before installing the cover make sure it and the top
of the enclosure are clean and free of dirt and debris. Use only bolts of the grade speci-
ed on the equipment label. Tighten the bolts to the torque specication.
WARNING:The purchaser should make the manufacturer aware of the external e󰀨ects
or aggressive substances that the equipment may be exposed to.
Location and Mounting
WARNING:Installation must be performed by a qualied electrician and conform to all
federal, state and local codes.
See Figure 3.
Mount the NH-4 heater in a vertical position on a wall or panel, allowing adequate
surrounding space to perform periodic maintenance. Always locate the heater as close to
the spray operation as possible.
NOTE:All ATEX approved NH-4 heaters include a kit with several labels in di󰀨erent
languages. Choose and install the appropriate language label for your NH-4 heater.

9
NH-4 Heaters
© 2023 Nordson Corporation 1602369-05
232 mm
(9.13 in.)
57 mm
(2.25 in.)
41.5 mm
(1.63 in.)
149 mm
(5.866 in.)
Outlet
Single passage
3/8 NPTF
Twin passage
(Obsolete)
1/2 NPTF
3/4 NPT
Both sides
4 Holes
ø9.5 mm
(ø0.374 in.)
84 mm
(3.307 in.)
433 mm
(17.86 in.)
Single passage
3/8 NPTF
Twin passage
(Obsolete)
1/2 NPTF
Inlet
98 mm
(3.54 in.)
22 mm
(0.875 in.)
Figure 3 NH-4 Heater Dimensions
Electrical
WARNING:Install a power isolation device or disconnect in the service line ahead of
the heater to prevent electrical shock during installation or servicing.
1. Remove the enclosure cover.
2. Route the power supply wiring (recommended 12 AWG, 90 °C (195 °F)) into the
electrical enclosure and connect the L1 (power) and L2 (neutral) leads to the terminal
block. Install the ground wire to the electrical enclosure internal ground stud.
3. Make sure the enclosure cover and top of the enclosure are clean and free of dirt
and debris. Install the enclosure cover and tighten the bolts to 1.11−1.66 kg•m (8−12
ft-lbs).
4. Install the ground cable to the external ground stud and clamp the cable to a true
earth ground.

10 NH-4 Heaters
© 2023 Nordson Corporation
1602369-05
DUAL HOOK−UP
SINGLE PHASE
L1
L2
L1
L2
L3
L1 L2 L1 L2
DUAL HOOK−UP
THREE PHASE
SINGLE HOOK−UP
SINGLE PHASE
L1
L2
TRIPLE HOOK−UP
SINGLE PHASE
L1
L2
L1 L2 L1 L2 L1 L2
TRIPLE HOOK−UP
THREE PHASE
L1
L2
L3
L1 L2 L1 L2 L1 L2
L1 L2 L1 L2
Figure 4 NH-4 Heater Wiring Diagrams
Fluid Lines and Fittings
CAUTION:The heater inlet and outlet ttings use O-ring seals which form a leak-proof
hydraulic seal if tightened properly. To prevent damage to the seals, do not over-tighten
ttings.
1. Install the uid inlet tting to the uid inlet port. Tighten the uid inlet tting to
2.08 kg (15 ft-lb).
2. Install the uid outlet tting to the uid outlet port. Tighten the uid outlet tting to
2.08 kg (15 ft-lb).
3. Install the high-pressure uid line from the pump to the heater uid inlet tting.

11
NH-4 Heaters
© 2023 Nordson Corporation 1602369-05
Multiple Heater Installations
Congure multiple heater installations in a series or parallel.
See Figure 5. Install the heaters in series for all general nishing applications, except
for those with very viscous materials or extremely high ow rates, such as continuous
coaters.
Figure 5 Series Installation
See Figure 6. Install the heaters in parallel for very viscous materials or extremely high
ow rate applications. In parallel systems the length of the hose between the manifold
and the heaters must not exceed 0.91 m (3 ft).
0.91 m (3 ft)
Max.
0.91 m (3 ft)
Max.
Figure 6 Parallel Installation

12 NH-4 Heaters
© 2023 Nordson Corporation
1602369-05
Thermometer Installation
Install the thermometer at the heater outlet port, or at the lter outlet port. The installation
kit furnished with the heater includes the ttings necessary for either installation.
See Figure 7.
1. Install the close nipple (6) in the heater output port. or hex nipple (6) to the lter output
port.
CAUTION:Use the stainless steel thermometer and ttings with the stainless steel
NH-4 heater to prevent damage to the equipment.
NOTE:If the thermometer is installed after the lter, use the hex nipple included with the
heater installation to install the adapter to the lter.
2. Install the applicable thermometer adapter (2 or 5) to the nipple.
3. Install the thermometer (1) to the thermometer adapter.
4. Install the elbow (3) to the thermometer adapter.
5. Connect the high-pressure uid line to the thermometer adapter elbow.
6. Make sure all ttings are tightened securely.
1
2
3
4
6
1
5
3
4
6
Twin Passage Obsolete
Figure 7 Thermometer Installation
1. Thermometer
2. Standard and stainless steel
thermometer adapter
3. Elbow
4. To lter inlet port
5. Twin passage thermometer adapter
6. Nipple

13
NH-4 Heaters
© 2023 Nordson Corporation 1602369-05
Filter Installation
Most coating materials and compounds eventually leave residual deposits on the inside
walls of the heater. These deposits may separate from the heater as small akes or
granules, which then pass through the system and cause nozzle or uid tip plugging. To
prevent this from happening, install a lter between the heater and the rst spray gun in
the system.
Use insulated or uninsulated high-pressure uid hose or seamless steel tubing to connect
the heater to the lter assembly. The selection of uid line, length, and routing (hung
on a wall, laid on the oor, etc.) will have a direct e󰀨ect on thermostat setting and uid
temperature at the spray gun. It is extremely important to place the heater and lter as
close to the spray operation as possible.
Thermostat Adjustment — Single Heater Installation
Adjust the thermostat to provide a starting point temperature for heater operation.
Refer to the Operation section for adjustment procedures to obtain the desired uid
temperature.
1. Ensure the power is removed from the heater.
NOTE:Rotating the thermostat control clockwise increases the heater temperature.
Rotating the thermostat control counter-clockwise decreases the heater temperature.
2. [EXT ADJ] Adjust the thermostat control to mid-range.
[INT ADJ] Remove the enclosure from the heater, adjust the thermostat control to mid-
range and install the cover. Tighten the cover bolts to 1.11−1.66 kg•m (8−12 ft-lbs).
Thermostat Adjustment — Multiple Heater Installations
Adjust each thermostat to provide a starting point temperature for operation. Refer to the
Operation section for adjustment procedures to obtain the desired uid temperature.
1. Ensure the power is removed from the heaters.
NOTE:Rotating the thermostat control clockwise increases the heater temperature.
Rotating the thermostat control counterclockwise decreases the temperature.
NOTE:The heater in the ow system that provides the nal uid output to the lter is the
last heater.
2. [EXT ADJ] Adjust the thermostat control on the last heater to mid-range. Turn the
thermostat controls on the remaining heaters fully counterclockwise.
[INT ADJ] Remove the enclosure covers from the heaters. Adjust the thermostat
control on the last heater in the system to mid-range. Turn the thermostat control on
remaining heaters fully counterclockwise. Install the enclosure covers and tighten the
cover bolts to 1.11−1.66 kg•m (8−12 ft-lb).

14 NH-4 Heaters
© 2023 Nordson Corporation
1602369-05
Operation
WARNING:Allow only qualied personnel to perform the following tasks. Follow the
safety instructions in this document and all other related documentation.
WARNING:This equipment can be dangerous unless it is used in accordance with the
rules laid down in this manual.
This section covers safety precautions, and single and multiple heater operation
procedures for the NH-4 heater. When a procedure is only applicable to a particular
model it is identied with a code. Refer to the Description section for an explanation of
these codes.
Safety Precautions
Observe the following safety precautions when operating a system with a heater.
WARNING:Make sure all equipment in the spray area is properly grounded. Periodical-
ly check grounds. Sparks, which can result in poor grounds, can cause res or explo-
sions.
WARNING:Inspect and maintain re detection systems and interlocks daily.
Refer to the Safety section for additional safety precautions.
Startup
WARNING:Do not operate the heater until the uid system is fully pressurized and
circulating. Failure to observe this warning can cause damage to the heat limiter or
heater.
1. Make sure that the heater is securely connected to a true earth ground.
2. Tighten all heater ttings securely before starting the pump.
3. Start the pump. Refer to the applicable pump manual for starting procedures.
4. Adjust the pump to 8−10 strokes per minute. Refer to the applicable pump manual for
adjusting procedures.
WARNING:Before applying power to the heater, make sure all conductive objects in the
spray area are properly grounded. Electrical sparks discharged from ungrounded
conductive objects may start res or cause explosions.
5. Apply power to the heater.
6. Allow the uid temperature to stabilize.