Hoffman JEL Series User manual

©/TM 2023 UnityLab Corp. All rights reserved.
www.buyhoffmansteamnow.com
INSTRUCTION MANUAL & PARTS LIST
JEL/ELG Series
2-GALLON STEAM GENERATORS
For original quality parts call:
1-800-221-0146
or fax: [phone]
www.buyhoffmansteamnow.com
©/TM 2023 UnityLab Corp. All rights reserved.
JEL3

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JEL3 TECHNICAL MANUAL
1.0 INTRODUCTION
This manual contains the installation, operation and maintenance instructions,
troubleshooting guide, repair parts illustrations and lists for the Hoffman Electric
Steam Generators. The Steam Generators are designed and manufactured
with constant attention to quality, performance, operator safety and energy
efciency. With proper installation, operation and maintenance, the Hoffman
Electric Steam Generator will last a lifetime.
The Steam Generators are composed of a pressure vessel, a safety valve, piping,
a heating element, controls and the enclosure.
The pressure vessel is manufactured from high strength steel or cast bronze.
It is rated at 100 pounds per square inch of steam pressure. The vessel, safety
valve and piping have been designed to the standards set forth in the American
Society of Mechanical Engineers Boiler and Pressure Vessel Code. It meets or
exceeds their requirements for safety. Many Steam Generator assemblies are UL
and/or CUL listed. Consult your Hoffman distributor for their identication.
The Heating Element is a ange mounted immersion element. Immersion
elements are the most energy efcient heating elements available. This is due
to the element making contact with the working uid (water), transferring all the
energy required for heating water into steam.
Some electric steam generator models use a thermostat controller to regulate
the steam pressure. The controller senses the temperature and regulates the
current to the heating element to provide the desired output. Larger generators
are regulated with pressure switch controllers.
Steam pressure and temperature are related. The higher the steam pressure, the
higher the temperature. For a listing of pressures and corresponding temperatures
see Chapter 6, Table 6.1.1.
Hoffman also offers a wide variety of options for the steam generators. For a
listing of the options available, please contact your Hoffman Distributor.
1.1 INTENDED USE
The generators listed in this manual are intended for small steam usage
requirements. They may be used for jewelry steam cleaning, dental lab steam
cleaning, auto trim, furrier glazing of garments, or for use with steam irons, etc.
The units are capable of producing high-pressure steam. They should not be
used for applications that require low-pressure steam unless provisions are
made to limit the steam pressure (i.e. autoclaves, steam bath applications, etc.).
The machines are not intended for space heating purposes.
1.2 REGISTRATION WITH LOCAL JURISDICTION
The steam generator may need to be registered with your local or state
government. Check with your municipality for requirements.
Table of Contents
1.0 INTRODUCTION .................................................................................... 2
1.1 INTENDED USE ...........................................................................................................................2
1.2 REGISTRATION WITH LOCAL JURISDICTION .....................................................................2
1.3 PRELIMINARY DELIVERY INSPECTION ..................................................................................3
1.4 WARRANTY ACTIVATION ......................................................................................................3
1.5 SAFETY AND PRECAUTIONS..................................................................................................3
1.5.1 SAFETY NOMENCLATURE.................................................................................................3
1.5.2 SAFETY FEATURES.............................................................................................................3
1.5.3 SAFETY SUMMARY........................................................................................................... 4
2.0 INSTALLATION ..................................................................................... 5
3.0 OPERATING INSTRUCTIONS ................................................................ 6
4.0 MAINTENANCE .................................................................................... 7
4.1 CLEANING THE BOILER..........................................................................................................7
4.2 CLEANING THE SIGHT GLASS..............................................................................................7
4.3 BLOWING DOWN THE BOILER .............................................................................................7
4.4 CLEANING THE STRAINER....................................................................................................7
5.0 TROUBLESHOOTING & SERVICING...................................................... 8
5.1 TROUBLESHOOTING TABLE .................................................................................................. 8
5.2 ADJUSTING THE STEAM PRESSURE ..................................................................................10
5.2.1 THERMOSTAT CONTROL ...............................................................................................10
5.3 REPLACING THE THERMOSTAT
5.4 REPLACING THE GAUGE SIGHT GLASS............................................................................11
5.5 REPLACING THE HEATING ELEMENT
5.6 REPLACING THE LOW WATER SWITCH........................................................................... 12
5.7 REPLACING THE ELECTRIC FOOT SWITCH AND/OR CORD........................................ 12
5.8 REPLACING THE ON/OFF SWITCH................................................................................... 13
5.9 CLEANING THE ELECTRIC SOLENOID VALVE..................................................................14
5.10 REPLACING THE ELECTRIC SOLENOID VALVE ...............................................................14
6.0 TABLES ................................................................................................15
6.1 PRESSURE VS. TEMPERATURE............................................................................................15
6.2 ELECTRICAL SPECIFICATIONS ..........................................................................................15
7.0 DRAWINGS & PARTS LIST ..................................................................16

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JEL3 TECHNICAL MANUAL
1.5.3 SAFETY SUMMARY
The following are general safety precautions that are not related to any
specic instructions and therefore do not appear elsewhere in this manual.
These are recommended precautions that personnel must understand and
apply during all phases of operation and maintenance.
1.3 PRELIMINARY DELIVERY INSPECTION
INSPECT BOX/CRATE AND STEAM GENERATOR FOR SHIPPING DAMAGE AND
SHORTAGE. ANY DAMAGE OR SHORTAGE IN SHIPMENT SHOULD BE NOTED ON THE
FREIGHT BILL BEFORE IT IS SIGNED. CALL THE CARRIER IMMEDIATELY TO REPORT
ALL DAMAGE OR SHORTAGE AND ARRANGE TO FILE A CLAIM. THE CARRIER IS
RESPONSIBLE TO YOU FOR THE SAFE ARRIVAL OF THE EQUIPMENT.
1.4 WARRANTY ACTIVATION
To activate the Warranty coverage on your Unity Steam equipment, please
register your product at www.buyhoffmansteamnow.com.
1.5 SAFETY AND PRECAUTIONS
It is vital that the purchaser of a Steam Generator read this manual and fully
understand the instructions before installing or operating the unit. Safety
statements are made throughout the manual in the format stated on this page
and the next page. Supervisors must assure that the personnel assigned to
operate this Steam Generator are instructed on and understand the operating
and safety features of the unit. The foregoing is imperative, along with safe
working habits of the operator, to assure worker safety.
1.5.1 SAFETY NOMENCLATURE
NOTES, CAUTIONS and WARNINGS are used through out this manual to
emphasize important and critical instructions.
NOTE: A NOTE IS USED TO EMPHASIZE OPERATING PROCEDURES AND CONDITIONS
THAT ARE ESSENTIAL TO HIGHLIGHT.
CAUTION
A CAUTION IS USED TO INDICATE A HAZARDOUS SITUATION THAT MAY RESULT
IN PERSONAL INJURY OR DAMAGE TO THE MACHINE.
WARNING
A WARNING IS USED TO INDICATE A HAZARDOUS SITUATION THAT HAS
SOME PROBABILITY OF DEATH OR SERIOUS PERSONAL INJURY.
1.5.2 SAFETY FEATURES
The following are safety features, which are incorporated into the Steam
Generator:
1. ASME Pressure Vessel.
2. ASME Pressure Relief Valve.
3. Steam Pressure Gauge to show internal pressure.
4. Sight Glass to show internal water level.
5. Sight Glass Shield to prevent inadvertent glass breakage.
6. Built in Low Water Cutoff.
7. Electric system designed, manufactured and tested to UL and/or CSA
Standards.
WARNING
DO NOT OPERATE OR SERVICE THIS MACHINE BEFORE READING AND
UNDERSTANDING THIS INSTRUCTION MANUAL.
WARNING
OSHA’S LOCKOUT/TAGOUT STANDARD (29 CFR 1910.147) REQUIRES THAT ALL
ENERGYSOURCES BE TURNED OFF AND “LOCKED OUT” WHILE MACHINES ARE
BEING SERVICED OR MAINTAINED.
WARNING
COMPLIANCE WITH ALL FEDERAL, STATE AND LOCAL CODES, ORDINANCES
AND LAWS REGARDING THE INSTALLATION OF THIS MACHINE IS REQUIRED.
WARNING
WHEN SERVICING THIS MACHINE, USE ONLY APPROVED HOFFMAN
REPLACEMENT PARTS.
WARNING
IT IS THE RESPONSIBILITY OF THE PURCHASER OF THIS MACHINERY TO TRAIN
THE OPERATING PERSONNEL IN THE PROPER MANNER OF OPERATION. IT IS
FURTHERMORE UNDERSTOOD THAT HOFFMAN ASSUMES NO RESPONSIBILITY
FOR INJURY, DISABILITY OR DEATH RESULTING FROM THE IMPROPER
OPERATION OF, REMOVAL FROM OR BYPASSING THEREOF ANY ELECTRICAL
OR MECHANICAL SAFETY DEVICES INCORPORATED IN THE DESIGN AND
MANUFACTURING OF THIS MACHINERY.
WARNING
THIS MACHINE DEVELOPS HIGH TEMPERATURES AND USES PRESSURIZED
STEAM, AS WELL AS HIGH ELECTRICAL VOLTAGES. BEFORE SERVICING THIS
MACHINE, DISCONNECT SOURCES OF ELECTRICITY AND STEAM, THEN BLEED
STEAM FROM THE MACHINE. ENSURE THAT ALL HEATED SURFACES ARE COOL
AND ALL MECHANISMS ARE IN THEIR ZERO POSITION.

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JEL3 TECHNICAL MANUAL
2.0 INSTALLATION 3.0 OPERATING INSTRUCTIONS
1. Open the gauge glass valves on the top and bottom of the gauge glass
assembly (on units supplied).
2. Check the drain valve to be certain that it is closed.
3. Filling the boiler: Assemble aluminum funnel into elbow on ll side.
A. For Manual Water Feed Models: Open the water ll valve on the side of the
boiler. Fill the boiler until the water reaches the “Full” mark (¾ the height of the
glass).
NOTE: IT MAY BE NECESSARY TO OPEN THE STEAM OUTLET VALVE TO ALLOW
AIR TO BREATHE FROM THE SYSTEM. AIR BOUND SYSTEMS WILL BE HARD TO FILL.
THERE IS AN AIR BREATHER VALVE LOCATED ON THE STEAM GAUGE LINE ON SOME
MODELS.
NOTE: IT IS RECOMMENDED TO USE DISTILLED WATER FOR OPTIMUM
PERFORMANCE.
NOTE: DO NOT OVERFILL THE BOILER. OVERFILLING WILL CAUSE WET STEAM OR
CAUSE DIRT PARTICLES TO DISCHARGE FROM THE STEAM NOZZLE.
After the unit is full, close the water ll valve.
B. For Automatic Water Feed Models with a Watts Water Feeder: Connect the
water line. Turn the water supply on. The Water Feeder will ll the boiler.
NOTE: THE WATTS WATER FEEDER MUST BE SUPPLIED WITH A HIGHER WATER
PRESSURE THAN OPERATING PRESSURE OF THE STEAM GENERATOR.
C. For Automatic Water Feed Models with a Pump: Connect the water line,
continue with the following steps. The pump will ll the boiler when the boiler
power is turned on.
4. Turn the ON/OFF switch to the “ON” position.
5. For Steam Pressure Adjustment:
A. For Thermostat Controlled Units, turn the black dial to the “10” position. This
will allow the steam generator to heat to the maximum pressure. Setting the
dial at less than “10” will allow the unit to be run at lower pressures.
B. Pressure Switch Controlled Units are factory set and do not require
adjustment.
6. For Models with a Low Water Cutoff with Manual Reset: Once the power is
turned on and the boiler is lled with water, push the reset switch. This will
energize the heating element, the low water light will shut off and the heating
light will turn on.
7. Allow some time for the boiler to build up pressure, then use as required. The
heating light will shut off when the boiler comes up to pressure.
CAUTION
SOME ASSEMBLY MAY BE REQUIRED. FOLLOW THE ASSEMBLY
INSTRUCTIONS PROVIDED WITH THE UNIT. PERFORM ALL ASSEMBLY
BEFORE INSTALLING THE UNIT.
CAUTION
ASSURE FLOOR/TABLE BEARING CAPACITY IS ADEQUATE FOR THE LOAD
IMPOSED BY THE STEAM GENERATOR.
WARNING
ALWAYS PROPERLY GROUND THE UNIT BEFORE OPERATING. ONLY A LICENSED
ELECTRICIAN SHOULD SERVICE OR INSTALL A HOFFMAN GENERATOR.
1. Some generator models are supplied with mounting holes. Mount the
generator to a bench or to the oor.
2. On models with a Watts Water Feeder, mount the generator perfectly level to
insure proper operation of the feeder.
3. Make sure that the generator is oriented so that the safety relief valve is
pointed away from any aisle or work area. Discharge piping from the relief
valve is recommended and may be required by local law.
4. If discharge piping must be installed on the safety relief valve, make sure
that the piping is so supported that it imposes no load on the valve itself.
The discharge pipe must be equal to or larger in pipe size than the outlet
of the safety relief valve. See yellow card attached to the Safety Valve for
instructions.
5. A water supply line must be connected to a generator with automatic water
feed (Watts Water Feeder or Pump). Use a Strainer on the water supply line to
protect the Watts Water Feeder or Pump.
6. Power the generator from a separate fused supply line. The amperage
ratings for various generators are indicated in Chapter 6, Table 6.2.1. Never
power the generator from a line that is rated less than that required to run
the unit.

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JEL3 TECHNICAL MANUAL
4.0 MAINTENANCE
The Hoffman Electric Steam Generator is compact, easy to clean and easy to
maintain. It is strongly suggested that the following steps be followed to ensure
a long and trouble free life for the boiler.
4.1 CLEANING THE BOILER
1. Turn the Thermostat to “OFF.”
2. Allow the boiler to cool. Check by opening steam valve.
3. Drain the boiler. Close the valve.
4. Fill the boiler to the “Full” mark or halfway up the sight glass with a solution of
three parts water to one part vinegar.
5. Bring the boiler up to pressure. Allow the boiler to heat for 30-60 minutes.
6. Blow the boiler down. See Section 4.3 “Blowing Down the Boiler” for the proper
procedure.
7. Repeat if necessary.
4.2 CLEANING THE SIGHT GLASS
1. Turn the Thermostat to “OFF.”
2. Allow the boiler to cool. Check by opening steam valve or drain valve.
3. Drain the boiler. Leave the valve open.
4. Open the petcock at the bottom of sight glass (if so equipped).
5. Remove the sight glass and clean with a bottle washer. Use a plastic bristle
brush. A metal wire brush could scratch the glass and is not recommended.
6. Install the sight glass.
4.3 BLOWING DOWN THE BOILER
This procedure should be performed at start up once a week providing the water
is clean. In areas with high mineral content or rusty water this procedure should
be performed once a day. The boiler should be ushed with a cleaning solution
at least twice a year.
1. Allow the pressure to reach 2 to 3 psig.
2. Turn the power off.
5.0 TROUBLESHOOTING & SERVICING
5.1 TROUBLESHOOTING TABLE
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
Unit does not
heat up.
Lack of power.
Check incoming power.
Check fuses.
Check On/Off switch is in “ON” position.
Thermostat set
too low. Adjust thermostat to “10” setting
Lack of water. Fill unit and reset low water switch.
Low water switch
tripped. Fill with water and reset low water switch.
Bad Heating
Element. Replace. See Section 5.5 – Replacing the Heating Element.
Bad Thermostat. Replace. See Section 5.3 –
Replacing the Thermostat.
Bad On/Off Switch. Replace. See Section 5.8 –
Replacing the On/Off Switch.
Bad Low Water
Switch. Replace. See Section 5.6 – Replacing the Low Water Switch.
Unit heats, but
shuts off at a
lower pressure
than normal.
Thermostat set
too low. Adjust thermostat to “10” setting.
Thermostat out of
adjustment. See Section 5.2 – Adjusting the Steam Pressure
Safety valve
leaking. Foreign material under seat.
Caution: Make sure discharge is away
from people and work areas. Pop safety
valve while steam is in unit to dislodge
foreign material.
Replace valve.
Fill valve leaking
Steam.
Water between
valve and ll cup. Water must be drained or allowed to boil off to stop leaking.
Packing nut loose.
When boiler is cool and pressure is at
zero (test by opening steam outlet valve)
tighten the nut on the handle stem.
Bad ll valve. Replace.
WARNING
THE WATER IN THE STEAM GENERATOR IS VERY HOT, THE DRAIN VALVE MUST
BE PIPED TO A DRAIN TO PREVENT A POSSIBLE BURN.
3. Open the drain valve and drain the boiler.
4. Close the drain valve.
4.4 CLEANING THE STRAINER
1. Turn the power off.
2. Allow the boiler to cool.
3. Drain the boiler. Leave the valve open.
4. Remove Strainer Cap and clean Screen.
5. Replace Cap.

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JEL3 TECHNICAL MANUAL
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
Water is dark
brown or black. Rust in Water.
See Section 4.3 – Blowing Down the
Boiler. Rust is a normal occurrence
in steam generator shells. The rust
appearance in the water will slowly
disappear after a few weeks of use. The
steam generator must be blown down
in accordance with instructions given in
this manual. Blowing down will minimize
the visual amount of discolored water.
No steam
comes from the
Solenoid Valve.
Bad Foot Switch. Check Switch. See Section 5.7 –
Replacing the Electric Foot Switch.
Bad Solenoid Valve. Replace. See Section 5.10 – Replacing
the Electric Solenoid Valve.
Can not ll with
water.
Breather valve not
open. See Section 3.0 – Operation.
Check Valve is
stuck.
Lightly tap valve.
Clean valve seat. Disconnect power
and remove pressure from the boiler.
Check no pressure by leaving the
breather open.
Replace valve.
Water Inlet
Solenoid Valve fails
to operate.
Replace Water Inlet solenoid Valve.
Boiler keeps
lling.
Inlet solenoid Valve
is dirty.
Clean seat in Solenoid Valve. WARNING:
Disconnect Power before servicing.
Drain Boiler.
Wet Steam. Too much water in
Boiler.
Drain tank until water level lls sight
glass approximately 75%.
Hard to see
through the
Sight Glass.
Minerals have
coated the glass.
Clean or replace. See Section 4.2 –
Cleaning the Sight Glass or Section 5.4
– Replacing the Gauge Sight Glass.
5.2 ADJUSTING THE STEAM PRESSURE
5.2.1 THERMOSTAT CONTROL
1. Power the boiler.
2. Turn the thermostat to “10.”
3. Allow the boiler to come up to pressure.
4. Remove the dial from the thermostat.
5. Using a small screwdriver, turn the screw inside the stem clockwise to
reduce the pressure, counter clockwise to increase the pressure.
6. Turn the stem in ¼ turn (90 deg.) increments. Allow the unit to heat or
cool. The nal high pressure is reached when the heating light goes out.
7. Use a dab of nail polish to secure the screw in position.
8. Put the dial back on the thermostat.
9. The maximum pressure setting shall be 90 psig. Attempting to raise
pressure higher will result in relief valve venting.
10. All eld wired units are supplied with a knock-out sized to UL
specications. Inside the electrical panel is a wiring schematic for
power and ground connections.
5.3 REPLACING THE THERMOSTAT
(To be performed by a licensed electrician)
1. Turn the power to the boiler off by pulling the plug or turning off the power at
the branch switch or circuit breaker.
2. Remove the wires on the thermostat.
3. Remove the dial from the thermostat.
4. Remove the mounting screws that hold the thermostat to the enclosure.
5. Remove the temperature sensing probe from the heating element.
6. Mount the new thermostat to the enclosure.
7. Insert the temperature sensing probe into the heating element. The sensing
probe may not go in all the way. This is normal. Insure that the sensing
tube is bent slightly up and out of the way of the heating element electric
connections. Do not kink the capillary tube.
8. Rewire the thermostat.
9. Power the steam generator. Adjustment may be necessary. If the pressure
comes too close to the safety valve rating (within 10 psig) turn the unit off
and adjust the thermostat in accordance with instructions given in this
manual.

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JEL3 TECHNICAL MANUAL
5.4 REPLACING THE GAUGE SIGHT GLASS
1. Turn off power to the boiler by pulling the plug or turning off power at the
branch switch or the circuit breaker.
2. Allow the boiler to cool to zero pressure.
3. Drain the water from the boiler. Leave the drain valve open.
4. Remove the Sight Glass Guard.
5. Remove the ttings that hold the glass in position. Top and Bottom nuts hold
the glass in position.
6. Replace the gauge glass. Do not over tighten. Always use new seals when
replacing the gauge glass.
7. Check for straight alignment of gauge glass. Brass ttings should not be
touching glass, realign if necessary.
8. Reinstall Sight Glass Guard.
9. Check for leaks during initial operation.
5.5 REPLACING THE HEATING ELEMENT
(To be performed by a licensed electrician)
1. Turn off the power to the boiler by pulling the plug or turning off the power at
the branch switch or the circuit breaker.
2. For models with manually operated steam outlet valves, allow the boiler to
cool to zero pressure. Test by opening steam outlet. For models with pedal
controlled steam outlet valves, turn power on, turn thermostat to off. Allow
boiler to cool to zero pressure. Test by stepping on pedal. At zero pressure,
turn power off at branch switch or circuit breaker or pull the plug.
3. Drain the water from boiler. Leave drain valve open.
4. Remove the front cover to the boiler enclosure.
5. Disconnect the wires from the heating element.
6. Remove the bolts on the heating element.
7. Remove “old” heating element.
8. Seal the gasket on both sides of the “new” heating element with a gasket
sealer. Use a “new” gasket.
NOTE: FOR MODELS WITH THERMOSTATIC CONTROL AND THERMOSTATIC RESET
(THERMODISC), IT IS IMPERATIVE TO INSTALL THE NEW ELEMENT WITH THE
THERMOWELL TUBES IN THE TOP POSITION.
9. Insert the “new” heating element, and tighten the bolts. If generator has
the thermostatic control/thermostatic reset (thermodisc), install sensing
probe(s) in heating element thermowell tubes.
10. Rewire the heating element.
11. Fill the boiler to the normal level, and CHECK FOR ANY LEAKS.
12. Power the boiler and allow the boiler to come up to pressure. CHECK FOR ANY
LEAKS.
13. Remount the front of the boiler enclosure.
14. Periodically, check for leaks during rst few days after installing new element.
5.6 REPLACING THE LOW WATER SWITCH
(To be performed by a licensed electrician)
1. Turn off the power to the boiler by pulling the plug or turning off the power at
the branch switch or the circuit breaker.
2. Allow the boiler to cool to zero pressure. Drain the boiler. Leave the valve
open.
3. Disconnect the wires from the Low Water Switch.
4. Remove the screws holding the Low Water Switch to the Cover. Save the
screws, they will be re-used.
5. Remove sensing probe from heating element.
6. Remove “old” Low Water Switch.
7. Re-attach the “new” Low Water Switch to the cover using the screws.
8. Insert sensing probe into the heating element. The sensing probe may not go
in all the way. This is normal. Insure that the sensing tube is bent slightly up
and out of the way of the heating element electric connections. Do not kink
the capillary tube.
9. Rewire the Low Water Switch.
10. Fill the boiler to the normal level.
11. Power the boiler and allow the boiler to come up to pressure. If the boiler
does not heat, push the reset button in the center of the switch to reset the
Low Water Switch.
5.7 REPLACING THE ELECTRIC FOOT SWITCH AND/OR CORD
(To be performed by a licensed electrician)
For Models: JEL-3, JEL-4, JEL-6
1. Turn off the power to the boiler by pulling the plug or turning off the power at
the branch switch or the circuit breaker.
2. Allow the boiler to cool to zero pressure. Drain the boiler. Leave the valve
open.
3. Remove the front cover to the boiler enclosure.
4. Remove the top cover of the foot switch.

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JEL3 TECHNICAL MANUAL
5. Disconnect the cord wires from the foot switch.
6. Check continuity through the switch while holding the switch lever down. If
the switch passes the test, skip to number 10.
7. If the switch fails the continuity test, loosen two screws on the bottom side of
the switch housing and remove the switch from the cord.
8. Insert cord through strain relief on the “new” foot switch and tighten strain
relief screws enough so that the switch cannot be pulled from the cord.
9. Reconnect the wires to the switch and reassemble the switch housing.
10. Check continuity through cord.
11. If cord fails the continuity test, disconnect the cord from the switch.
12. Remove strain relief from the side of the boiler cabinet.
13. Reconnect the wires to the foot switch from the new cord.
14. Inside the boiler cabinet, reconnect the “new” foot switch wire to the same
place that the “old” one was removed. Use the strain relief connection from
the “old” switch. The strain relief pops into the cabinet’s side.
15. Remount the front of the boiler enclosure.
16. Test unit.
5.8 REPLACING THE ON/OFF SWITCH
(To be performed by a licensed electrician)
1. Turn off the power to the boiler by pulling the plug or turning off power at the
branch switch or circuit breaker.
2. Allow the boiler to cool to zero pressure. Drain the boiler. Leave the valve
open.
3. Remove the front cover to the boiler enclosure.
4. Disconnect the wires from the ON/OFF switch.
5. Remove the nut, which holds the switch to the cover. Located on the outside
of the cover.
6. Remove “old” ON/OFF switch.
7. Insert the “new” On/OFF switch.
8. Rewire the switch.
9. Remount the front of the boiler enclosure.
10. Test the unit.
5.9 CLEANING THE ELECTRIC SOLENOID VALVE
(To be performed by a licensed plumber)
For Models: JEL-3, JEL-4, JEL-6
1. Turn off the power to the boiler by pulling the plug or turning off power at the
branch switch or at the circuit breaker.
2. Allow the boiler to cool to zero pressure.
3. Drain the water from the boiler. Leave the valve open.
4. Loosen the Romex connector screws.
5. Remove the large brass nut on the solenoid valve.
CAUTION
THIS SOLENOID VALVE IS SUBJECTED TO HIGH PRESSURE STEAM. INSURE THAT
THE SOLENOID VALVE IS TIGHTLY SCREWED INTO THE STEAM OUTLET PIPING.
CAUTION
THIS SOLENOID VALVE IS SUBJECTED TO HIGH PRESSURE STEAM. INSURE THAT
THE SOLENOID VALVE IS TIGHTLY SCREWED INTO THE STEAM OUTLET PIPING.
6. Slide off the electric box from the solenoid valve or remove nut, and remove
valve coil.
7. Remove stem from valve.
8. Clean off seat in valve and clean the Teon seat on the plunger. Do not
scratch the seat in the valve or on the plunger.
9. Reassemble valve.
5.10 REPLACING THE ELECTRIC SOLENOID VALVE
(To be performed by a licensed electrician)
For Models: JEL-3, JEL-4, JEL-6
1. Turn off the power to the boiler by pulling the plug or turning off the power
atthe branch switch or at the circuit breaker.
2. Allow the boiler to cool to zero pressure. Drain the boiler. Leave the valve
open.
3. Disconnect the wires from the solenoid valve.
4. Remove the “old” solenoid valve.
5. Install the “new” solenoid valve.
NOTE: MAKE SURE THAT PORT #1 IS CONNECTED TO THE BOILER VESSEL SIDE AND
PORT #2 IS CONNECTED TO THE OUTLET SIDE.
6. Rewire the solenoid valve to the unit.
7. Test the unit.

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JEL3 TECHNICAL MANUAL
6.0 TABLES
6.1 PRESSURE VS. TEMPERATURE
The following table shows the relationship between steam pressure in pounds
per square inch (psig), and temperature in degrees Fahrenheit (ºF). This table
can be useful in determining the steam temperature at a corresponding
pressure. It is helpful in setting the pressure when the steam generator is
connected to auxiliary equipment that requires temperature adjustment.
Table 6.1.1
Pressure (psig) Temperature (ºF)
1 213
5 228
10 240
15 250
20 259
25 267
30 274
35 281
40 287
45 293
50 298
55 303
60 308
65 312
70 316
75 320
80 324
85 328
90 331
95 335
100 338
6.2 ELECTRICAL SPECIFICATIONS
The following table illustrates the voltage and amperage requirements of the
various models of Steam Generators.
Table 6.2.1
MODEL
NUMBER KW VOLTAGE PHASE AMPS
JEL-1 1.5 120 1 13
JEL-2 1.5 240 1 7
JEL-3 1.5 120 1 13
JEL-4 1.5 240 1 7
JEL-6 3.0 240 1 13
ELG-4 1.5 120 1 13
ELG-4.2 1.5 240 1 7
ELG-5 1.5 120 1 13
ELG-5.2 1.5 240 1 7
ELG-6 3.0 240 1 13
ELG-7 3.0 240 1 13
7.0 DRAWINGS & PARTS LIST
Figure 7.1 -Assembly for Models: JEL-1, JEL-2, JEL-3, JEL-4, JEL-6, ELG-4, ELG-4.2,
ELG-5, ELG-5.2, ELG-6, ELG-7
Figure 7.2 -52488 (rev B) Wiring Diagram for Models: JEL-1, JEL-2, JEL-3, JEL-4,
JEL-6, ELG-4, ELG-4.2, ELG-5, ELG-5.2, ELG-6, ELG-7
Optional Parts List
For Original Quality Parts: 1-800-484-3013

©/TM 2023 UnityLab Corp. All rights reserved. | 1817
JEL3 TECHNICAL MANUAL
Figure 7.1 – Assembly for Models: JEL-1, JEL-2, JEL-3, JEL-4, JEL-6, ELG-4, ELG-
4.2, ELG-5, ELG-5.2, ELG-6, ELG-7
Figure 7.2 – 52488 (rev C) Wiring Diagram for Models: JEL-1, JEL-2, JEL-3, JEL-4,
JEL-6, ELG-4, ELG-4.2, ELG-5, ELG-5.2, ELG-6, ELG-7
LAST PURCHASED 2010
76604
76605
76601
046418
76602
05216
72762
72759
Optional Parts List
Part No. Description QTY.
108577-1 Caster Plate
Models: ELG-4, ELG-4.2, ELG-5, ELG-5.2, ELG-6, ELG-7 1
SG755 Manual Steam Gun
Models: ELG-4, ELG-4.2, ELG-5, ELG-5.2 ELG-6, ELG-7 1
08133-A Electric Steam Gun
Models: JEL-3S 1
108578 Handle
Models: ELG-4, ELG-4.2, ELG-5, ELG-5.2, ELG-6, ELG-7 1
23086 Teon Hose 3 Feet
23082 Teon Hose 5 Feet
23083 Teon Hose 6 Feet
23084 Teon Hose 7 Feet
23085 Teon Hose 8 Feet
23087 Teon Hose 10 Feet