Hoffman GEMIII User manual

©/TM 2023 UnityLab Corp. All rights reserved.
www.buyhoffmansteamnow.com
INSTRUCTION MANUAL & PARTS LIST
GEMIII
For original quality parts call:
1-800-221-0146
or fax: [phone]
www.buyhoffmansteamnow.com
©/TM 2023 UnityLab Corp. All rights reserved.
GEMIII

©/TM 2023 UnityLab Corp. All rights reserved. | 21
GEM-III TECHNICAL MANUAL
1.0 INTRODUCTION
This manual contains installation, operation and repair parts lists for the GEMIII
Steam Generator.
The GEMIII is designed with constant attention to quality, performance and
operator safety. It is constructed of the highest quality materials and rigorously
tested at the factory.
1.1 PRECAUTIONS
It is vital that the purchaser of a GEMIII read these instructions and fully
understand them before installing or operating the machine. It is also the
responsibility of the purchaser to make sure that all personnel that come in
contact with this machine comply with and understand all the safety related
instructions and warnings that are in this Instruction Manual.
1.2 SAFETY NOMENCLATURE
NOTES, CAUTIONS and WARNINGS used throughout this manual to emphasize
important and critical instructions.
NOTE: A NOTE IS USED TO EMPHASIZE OPERATING PROCEDURES & CONDITIONS
THAT ARE ESSENTIAL TO HIGHLIGHT.
CAUTION
A CAUTION IS USED TO INDICATE A HAZARDOUS SITUATION, WHICH 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.
1.3 SAFETY SUMMARY
The following are general safety precautions that are not related to any specic
procedures 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.
Table of Contents
1.0 INTRODUCTION .................................................................................... 2
1.1 PRECAUTIONS ...........................................................................................................................2
1.2 SAFETY NOMENCLATURE .......................................................................................................2
1.3 SAFETY SUMMARY...................................................................................................................2
1.4 SUMMARY DATA AND TABLE ............................................................................................... 4
2.0 INSTALLATION & STARTUP INSTRUCTIONS ........................................ 5
2.1 GENERAL INSTALLATION INSTRUCTIONS .......................................................................... 5
2.2 LOCATING THE STEAM GENERATOR.................................................................................. 5
3.0 OPERATING INSTRUCTIONS ................................................................ 5
3.1 OPERATING INSTRUCTIONS ................................................................................................. 5
3.2 CLEANING INSTRUCTIONS................................................................................................... 6
4.0 TROUBLE SHOOTING............................................................................ 7
4.1 TROUBLE SHOOTING...............................................................................................................7
5.0 DRAWING & PARTS LIST...................................................................... 8
5.1 WIRING DIAGRAM .................................................................................................................. 8
5.2 PARTS LIST .............................................................................................................................. 8

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GEM-III TECHNICAL MANUAL
WARNING
DO NOT OPERATE OR SERVICE THIS MACHINE BEFORE READING AND
UNDERSTANDING THIS INSTRUCTION MANUAL.
1.4 SUMMARY DATA AND TABLE
Table 1.4.1
SERVICE CONNECTIONS
Electric 120 VAC, 60 Hz, 1 Phase, 15 Amps.
Table 1.4.2
MODEL
GEMIII DIMENSIONS inches (mm) SHIPPING
WEIGHT
lbs(kg)
MACHINE
WEIGHT
lbs(kg)
Length Width Height
GEMIII 12.5 (317) 8.75 (222) 12.4 (315) 18.5 (8.4) 16.3 (7.4)
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 IMPROPER OPERATION
OF, OR REMOVAL FROM OR BY-PASSING THEREOF ANY ELECTRICAL OR
MECHANICAL SAFETY DEVICES INCORPORATED IN THE DESIGN AND
MANUFACTURING OF THIS MACHINERY.
WARNING
BEFORE SERVICING THIS MACHINE, DISCONNECT SOURCES OF ELECTRIC.
ALLOW THE STEAM GENERATOR AND ALL OTHER COMPONENTS TO COOL.
NOTE: WHEN SERVICING THIS MACHINE, USE ONLY APPROVED HOFFMAN
REPLACEMENT PARTS.
NOTE: USE DISTILLED WATER ONLY.
NOTE: KEEP OPENINGS (FOR AIR) AROUND STEAM GENERATOR FREE AND CLEAR OF
ALL MATERIALS.
NOTE: KEEP UNIT AWAY FROM CORROSIVE MATERIALS.
CAUTION
DO NOT TOUCH THE STEAM NOZZLE ASSEMBLY DURING USE OR UNTIL
IT COOLS AFTER USE. IT IS HOT.
CAUTION
DO NOT BLOCK STEAM NOZZLE BUT, IF IT BECOMES PARTIALLY CLOGGED
REMOVE WHEN COOL AND CLEAN THOROUGHLY.
CAUTION
DO NOT RESTRICT THE AIRFLOW AROUND THE UNIT IN ANY WAY UNTIL IT
IS COMPLETELY COOL TO THE TOUCH.

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GEM-III TECHNICAL MANUAL
2.0 INSTALLATION & STARTUP INSTRUCTIONS
2.1 GENERAL INSTALLATION INSTRUCTIONS
This section contains instructions for installing and preparing the machine for
operation. All machines are tested and adjusted before leaving the factory.
2.2 LOCATING THE STEAM GENERATOR
1. Remove the machine from the shipping carton and remove all wrapping
from the Steam Generator. Check for any shipping damage caused by or
due to shipping.
NOTE: DO NOT LIFT THE UNIT BY THE STEAM NOZZLE AS THIS CAN DAMAGE
THE UNIT.
2. Set the unit in a clear area where nothing can touch or surround the unit.
Proper air ventilation must be allowed to ow around and through the Steam
Generator. Also, do not set anything on nor lean objects against it.
3. Plug the power cord into a 120 volt 15 amp (minimum) receptacle.
4. Place the foot pedal on the oor so that it rests conveniently at the left side of
the unit.
5. Place the end of the clear vinyl water intake hose into a container of distilled
water. Make sure that the copper tubing extending from the vinyl is at the
bottom of the container.
NOTE: USE DISTILLED WATER ONLY. TAP, SPRING AND FILTERED WATER ARE NOT
THE SAME AS DISTILLED WATER AND CAN DAMAGE THE STEAM GENERATOR. THE
USE OF NON-DISTILLED WATER WILL CAUSE MINERAL DEPOSITS WHICH WILL CLOG
THE STEAM CHAMBER AND OUTPUT NOZZLE. THE DAMAGE WILL BE SEVERE.
3.0 OPERATING INSTRUCTIONS
This section contains instructions and information required to operate the GEMIII.
Before operating the GEMIII, it is important that the operating personnel become
thoroughly familiar with the operating instructions.
3.1 OPERATING INSTRUCTIONS
The following steps outline the procedures for operating the GEMIII.
1. Turn the power switch to the on position and the red light will come on to
indicate that the machine is on.
2. The warm up time will be approximately ten minutes but it may vary. As soon as
the machine is turned on, the pump should be primed. Step on the foot pedal
and you should see distilled water owing through the vinyl tubing. Continue
depressing the foot pedal until the water reaches the inside of the machine.
3. The green “ready” light will come on indicating that the chamber is fully
heated and that the unit is ready for use. During use and throughout the day
the green light will cycle (on and off) in order to maintain maximum chamber
temperature. To make steam, wait until the green “ready” light comes on for
the rst time. Then push the foot pedal for approximately three to ve seconds.
NOTE: DO NOT HOLD FOOT PEDAL LONGER THAN FIVE SECONDS OR THIS WILL
CAUSE STEAM CHAMBER TO FILL WITH WATER. WHEN THIS HAPPENS THE ELEMENT
WILL HAVE TO REHEAT THE CHAMBER. WHEN THE CHAMBER IS HEATING THE
WATER INSIDE WILL SLOWLY TURN TO STEAM AND ESCAPE THROUGH THE NOZZLE.
THE LIGHT WILL CYCLE BACK TO GREEN WHEN HOT AND CAN BE OPERATED
NORMALLY AGAIN.
4. In normal use the steam will always be available. However, for long or
extended steam outputs the pressure and volume will decrease and, in some
cases the unit may require a few moments for the chamber to be brought
back to “ready” temperature.
NOTE: DURING NORMAL OPERATION SOME STEAM MAY ESCAPE FROM THE NOZZLE
WHEN NOT BEING USED. THIS IS JUST SMALL AMOUNTS OF WATER LEFT IN THE
CHAMBER TURNING TO STEAM.
CAUTION
AFTER RELEASING FOOT PEDAL, THIS UNIT WILL CONTINUE TO STEAM FOR
APPROXIMATELY 15 SECONDS. THIS IS NORMAL OPERATION.
WARNING
THE STEAMER STAYS HOT FOR A LONG TIME. TO AVOID BURNS, ALLOW THE
STEAMER TO COOL COMPLETELY BEFORE CLEANING.
3.2 CLEANING INSTRUCTIONS
The GEMIII Flash Steamer has a stainless steel, corrosion resistant and easy to
clean housing. To keep the housing clean and sanitized, have the steamer fully
cooled and wipe all exterior surfaces with antibacterial wipes such as Clorox®
Disinfecting Wipes.
This procedure should be performed at the end of each day or shift.

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GEM-III TECHNICAL MANUAL
4.0 TROUBLE SHOOTING
The following section contains a troubleshooting guide on the GEMIII.
4.1 TROUBLE SHOOTING
Table 4.1.1 – Trouble Shooting
PROBLEM POSSIBLE CAUSE SOLUTION
No power/lights
Power switch Check to see if switch is
turned on.
Power plug Check to see if plug is
plugged in.
Power/Circuit Breaker Check power at 120 volt receptacle. Check circuit
breaker.
No steam
Vinyl water intake hose Check that hose is underwater and at the bottom of water
container
Pump motor Check; if not running see no
power/lights above.
Steam nozzle Clean.
5.0 DRAWING & PARTS LIST
5.1 WIRING DIAGRAM
Wiring Diagram Descriptions
S1 = MAIN POWER ON/OFF SWITCH
R = RED INDICATING LAMP
E = HEATING ELEMENT
TS = SAFETY THERMOSTAT
G = GREEN INDICATING LAMP
FS = FOOT SWITCH (S2)
M = PUMP MOTOR
5.2 PARTS LIST
Figure 5.1
Note: Internal items 9 through 15 not shown.

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GEM-III TECHNICAL MANUAL
ITEM
NO. PART NO. DESCRIPTION PHOTO
1 113285 NOZZLE
2 0663294-1 RED LIGHT
ASSEMBLY
3 0663294-1G GREEN LIGHT
ASSEMBLY
4 0664003
ON & OFF
SWITCH
ASSEMBLY
5 0575030
HANDLE
(Hardware
Included)
6 0663295-1 POWER CORD
ASSEMBLY
7 065177 VINYL TUBING
5 ft.
8 75914 FOOT PEDAL
ASSEMBLY
9 0663995 THERMOSTAT
ITEM
NO. PART NO. DESCRIPTION PHOTO
10 0664148
THERMOSTAT
WITH
MANUAL RESET
11 0145004 SAFETY VALVE
12 0663763 HEATING
ELEMENT
13 0663816 PUMP
14 AP2607 RESTRICTOR
15 0663816-1 PUMP MOUNTING
BRACKET
16 0764045 RUBBER BUMPER
(FOOT)