Groen HYPERSTEAM HY6G User manual

This manual provides information for:
OPERATOR MANUAL
IMPORTANT INFORMATION, KEEP FOR OPERATOR
PART NUMBER 141601 REV F (07/14)
MODEL HY-6G
HYPERSTEAM™
ATMOSPHERIC
CONVECTION STEAMER
· Self Contained
· Gas
· Capacity: 6 Steamer Pans (12” x 20” x 2-1/2”)
THIS MANUAL MUST BE RETAINED FOR FUTURE REFERENCE.
READ, UNDERSTAND AND FOLLOW THE INSTRUCTIONS AND
WARNINGS CONTAINED IN THIS MANUAL.
WARNING / FOR YOUR SAFETY
Do not store or use gasoline or other ammable vapors
and liquids in the vicinity of this or any other appliance.
POST IN A PROMINENT LOCATION
Instructions to be followed in the event user smells
gas. This information shall be obtained by consulting
your local gas supplier. As a minimum, turn o the gas
and call your gas company and your authorized service
agent. Evacuate all personnel from the area.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, injury or
death. Read the installation, operating and maintenance
instructions thoroughly before installing or servicing this
equipment.
NOTIFY CARRIER OF DAMAGE AT ONCE
It is the responsibility of the consignee to inspect the container upon receipt of
same and to determine the possibility of any damage, including concealed dam-
age. Unied Brands suggests that if you are suspicious of damage to make a
notation on the delivery receipt. It will be the responsibility of the consignee to le
a claim with the carrier. We recommend that you do so at once.
Manufacture Service/Questions 888-994-7636.
Information contained in this document is known to be current and accurate at the time
of printing/creation. Unified Brands recommends referencing our product line websites,
unifiedbrands.net, for the most updated product information and specifications.
1055 Mendell Davis Drive
Jackson, MS 39272
888-994-7636, fax [phone]
unifiedbrands.net

2 OM-HY/6G
IMPORTANT - READ FIRST - IMPORTANT
WARNING: THE UNIT MUST BE INSTALLED BY PERSONNEL QUALIFIED TO WORK WITH ELECTRICITY AND
PLUMBING. IMPROPER INSTALLATION CAN CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO
THE EQUIPMENT. THE UNIT MUST BE INSTALLED IN ACCORDANCE WITH APPLICABLE CODES.
WARNING: BEFORE REMOVING ANY PARTITION OR PANEL, TURN OFF THE ELECTRICAL POWER AND ALLOW
THE FAN TO STOP ROTATING. BEFORE WORKING ON ANY ELECTRICAL COMPONENT DISCONNECT
THE POWER SOURCE FROM THE UNIT.
NOTICE: DO NOT INSTALL THE UNIT IN ANY WAY WHICH WILL BLOCK THE RIGHT SIDE VENTS, OR WITHIN 12
INCHES OF A HEAT SOURCE SUCH AS A BRAISING PAN, DEEP FRYER, CHAR BROILER OR KETTLE.
NOTICE: LEVEL THE UNIT FRONT TO BACK, OR PITCH IT SLIGHTLY TO THE REAR, TO AVOID DRAINAGE
PROBLEMS.
CAUTION: MAKING ANY ELECTRICAL OR MECHANICAL CHANGE IN THE UNIT WITHOUT PRIOR APPROVAL
FROM GROEN FOOD SERVICE ENGINEERING WILL VOID ALL WARRANTIES.
WARNING: TO AVOID DAMAGE OR INJURY, FOLLOW THE WIRING DIAGRAM EXACTLY WHEN CONNECTING A
UNIT.
CAUTION: DO NOT USE PLASTIC PIPE. DRAIN MUST BE RATED FOR BOILING WATER.
WARNING: DO NOT CONNECT THE DRAIN DIRECTLY TO A BUILDING DRAIN.
WARNING: BLOCKING THE STEAM GENERATOR OR CAVITY DRAIN SCREEN MAY BE HAZARDOUS.
IMPORTANT: IMPROPER DRAIN CONNECTION WILL VOID WARRANTY.
WARNING: WHEN YOU OPEN THE DOOR, STAY AWAY FROM STEAM COMING OUT OF THE UNIT. STEAM CAN
CAUSE BURNS.
WARNING: ALL POTENTIAL USERS OF THE EQUIPMENT SHOULD BE TRAINED IN SAFE AND CORRECT
OPERATING PROCEDURES.
WARNING: NO ATTEMPT SHOULD BE MADE TO OPERATE THIS EQUIPMENT DURING A POWER FAILURE.
WARNING: BEFORE CLEANING THE OUTSIDE OF THE STEAMER, DISCONNECT THE ELECTRIC POWER SUPPLY.
KEEP WATER AND CLEANING SOLUTIONS OUT OF CONTROLS AND ELECTRICAL COMPONENTS.
NEVER HOSE OR STEAM CLEAN ANY PART OF THE UNIT.
WARNING: ALLOW COOKING CHAMBERS TO COOL BEFORE CLEANING.
WARNING: CAREFULLY READ THE WARNINGS AND FOLLOW THE DIRECTIONS ON THE LABEL OF EACH
CLEANING AGENT. USE SAFETY GLASSES AND RUBBER GLOVES AS RECOMMENDED BY DELIMING
AGENT MANUFACTURER.
WARNING: DO NOT MIX DE-LIMING AGENTS (ACID) AND DE-GREASERS (ALKALI) IN THE STEAM GENERATOR
OR ON THE COOKING CHAMBER WALLS.
WARNING: DO NOT PUT HANDS OR TOOLS INTO THE COOKING CHAMBER UNTIL THE FAN HAS STOPPED
TURNING.

OM-HY/6G 3
WARNING: DO NOT OPERATE THE UNIT UNLESS THE REMOVABLE RIGHT SIDE PANELS HAVE BEEN RETURNED
TO THEIR PROPER LOCATIONS.
NOTICE: DO NOT USE A CLEANING OR DE-LIMING AGENT THAT CONTAINS ANY SULFAMIC ACID OR ANY
CHLORIDE, INCLUDING HYDROCHLORIC ACID. IF THE CHLORIDE CONTENT OF ANY PRODUCT IS
UNCLEAR, CONSULT THE MANUFACTURER.
NOTICE: USE NO DE-GREASER THAT CONTAINS POTASSIUM HYDROXIDE OR SODIUM HYDROXIDE OR THAT
IS ALKALINE.
WARNING: USE OF ANY REPLACEMENT PARTS OTHER THAN THOSE SUPPLIED BY GROEN OR THEIR
AUTHORIZED DISTRIBUTOR VOIDS ALL WARRANTIES AND CAN CAUSE BODILY INJURY TO THE
OPERATOR AND DAMAGE THE EQUIPMENT. SERVICE PERFORMED BY OTHER THAN FACTORY-
AUTHORIZED PERSONNEL WILL VOID ALL WARRANTIES.
IMPORTANT - READ FIRST - IMPORTANT

4 OM-HY/6G
Important Operator Warnings ....................................................page 2-3
References.................................................................................... page 4
Equipment Description.................................................................. page 5
Water Quality and Treatment .......................................................... page 6
Inspection and Unpacking ............................................................ page 7
Installation .................................................................................. page 8-9
Initial Start-Up............................................................................... page 10
Operation ................................................................................ page 11-12
Cleaning.................................................................................. page 13-14
Maintenance................................................................................. page 15
Troubleshooting............................................................................ page 16
Electrical Schematic .................................................................. page 23
Service Log ................................................................................. page 24
ZEP MANUFACTURING CO.
1310-T Seaboard Industrial Blvd.
Atlanta, Georgia 30318
NATIONAL FIRE PROTECTION ASSOCIATION
60 Batterymarch Park
Quincy, Massachusetts 02269
NFPA/70 The National Electrical Code
NFPA/54 Installation of Gas Appliances & Piping
NSF INTERNATIONAL
789 N. Dixboro Rd.
P.O. Box 130140
Ann Arbor, Michigan 48113
CSA INTERNATIONAL
8501 Ease Pleasant Valley Road
Cleveland, Ohio 44131
AMERICAN NATIONAL STANDARDS INSTITUTE
1403 Broadway, New York, New York 10018
Z21.30 Installation of Gas Appliances & Piping
Z223.1-1984 National Fuel Gas Code
Table of Contents
References

OM-HY/6G 5
Your Groen HY-6G HyPerSteam Convection Steamer is designed to give years of
service. It has two stainless steel cavities (cooking chambers) which are served by
twin, independent atmospheric steam generators which are gas-heated. A powerful
blower circulates the steam in each cavity, to increase heating efficiency.
Each cavity holds up to three steam table pans (12”x 20” x 2½”). A 16 gauge stainless
steel cabinet encloses the cavities, the steam generators and the control compartment
that houses electrical components. Door hinges are reversible (the doors may be set to
open from the left or right). Operating Controls are on the front panel.
Newer model HY-6G steamers (manufactured since July 1999) are equipped with
fully electronic controls and a button-activated, pre-programmed CLEAN cycle. These
units are readily identified by their unique control panels. The On-Off switch on older
models has been replaced by touch pad controls, and the distinctive symbol for steam
is integrated into the panel design. The new model also has fewer panel louvers on the
right side.
The drain system includes a spray condenser, which reduces condensate temperature
and helps keep steam from escaping through the drain.
Voltage: 108-126 VAC Single Phase 50/60 Hz
Current: 2.5 AMPs ± 10%
BURNER FIRING RATES
INPUT RATES, BTU/HOUR NATURAL GAS
at 3.7” W.C.
LP GAS
at 10.5” W.C.
Individual Steam Generator 45,000 45,000
Total, Both Cavities 90,000 90,000
WARNING
BEFORE REMOVING ANY PARTITION OR
PANEL, TURN OFF THE ELECTRICAL POWER
AND LET THE FAN STOP ROTATING.
BEFORE WORKING ON ANY ELECTRICAL
COMPONENT, DISCONNECT THE POWER
SOURCE FROM THE UNIT.
WARNING
THE UNIT MUST BE INSTALLED BY
PERSONNEL WHO ARE QUALIFIED TO
WORK WITH ELECTRICITY AND PLUMBING.
IMPROPER INSTALLATION CAN CAUSE
INJURY TO PERSONNEL AND/OR DAMAGE TO
THE EQUIPMENT. THE UNIT MUST BE
INSTALLED IN ACCORDANCE WITH
APPLICABLE CODES.
The HY-6G has two independent cavities, each
with its own base-mounted steam generator.

6 OM-HY/6G
Water Quality & Treatment
It is essential to supply the steam generator with water that will not form scale or cause
corrosion. Even though the steam generator is engineered to minimize scale formation
and the effects of corrosion, their development depends on the quality of your water and
the number of hours per day you operate the equipment.
Most water supplies are full of minerals and chemicals which are not suitable for use in
a steam generator.
Water quality varies from state to state and city to city. It is necessary that you know
and understand the quality of the water you are using. Your water utility can tell you
about the minerals and chemicals in your water. The water going to the steam generator
should be within these guidelines
Water Pressure 30-60 psi
PH 7 to 9
Hardness less than 60 ppm
TDS 30 to 60 ppm
Chlorine and Chloramine less than 0.1 ppm
Total Chloride less than 30 ppm
Silica less than 12 ppm
Undissolved Solids less than 5 microns
1. Do not rely on unproven water treatments which are sold for scale prevention or
scale removal. They don’t always work. The best way to prevent scale is to supply
the purest possible water (30 - 60 ppm TDS).
2. If your water contains scale-forming minerals, as most water does, use a well-
maintained water softener. Whether an exchangeable softener cartridge or a
regenerating system is chosen, a regular exchange schedule is essential.
3. Installing a water meter between the softener and the steamer will provide an
accurate gauge of water use, and will help determine when to exchange cartridges
or regenerate the softener. Using a water softener will provide longer generator life,
higher steam capacity, and reduce maintenance requirements.
4. If you notice a slowdown in steam production, have the unit checked for scale
build-up. Heavy scale reduces the unit’s ability to boil water and can even cause
heating elements in the steam generator to overheat and burn out
Treated
Water
Untreated
Water
Drain
REAR VIEW
Gas
Connection

OM-HY/6G 7
Inspection & Unpacking
CAUTION
SHIPPING STRAPS ARE UNDER TENSION
AND CAN SNAP BACK WHEN CUT.
Your HY-6G HyPerSteam will be delivered completely assembled in a heavy shipping
carton and attached to a skid. On receipt, inspect the carton carefully for exterior
damage.
Carefully cut the straps around the carton and detach the sides of the carton from the
skid. Be careful to avoid personal injury. Strap edges may be very sharp, particularly
where cut.
Write down the model number, serial number and installation date. Space for these
entries is provided in the Service Log at the back of this manual. Keep the manual near
the equipment for reference and update as needed.
When installing, use material handling equipment to lift the unit straight up from the skid.
Check packing materials for any loose parts.
CAUTION
THIS UNIT WEIGHS 550 POUNDS. GET HELP
AS NEEDED AND USE MATERIAL HANDLING
EQUIPMENT TO MOVE IT.

8 OM-HY/6G
The HY-6G steamer is suitable for installation on or near both combustible and
noncombustible surfaces. Minimum installation clearances are:
Right Side 2 inches
Left Side 0 inches
Rear 6 inches
However, for easy service at least 12 inches clearance is required for the right side of
the unit, and it may not be installed within 12 inches of a heat source, as stated in the
Caution above.
The unit must be installed in a well-ventilated room with an adequate air supply. The
steamer must be installed beneath a ventilation hood, since gas combustion products
exit the appliance.
Any item which might obstruct or restrict the flow of air for combustion and ventilation
must be removed. Do not obstruct the flue cover or any front, side, rear, or top vents
after installation.
The area directly around the appliance must be cleared of all combustible material.
The installation must conform with local codes or, in the absence of local codes, with
the National Fuel Gas Code, ANSI Z223.1, latest edition, including the following:
The unit and its individual shutoff valve must be disconnected from the gas supply
system during any pressure testing of that system at test pressures in excess of 1/2
PSI (3.45 kPa). It must be isolated from the gas supply piping system by closing its
individual manual shutoff valve during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2 PSI (3.45 kPa).
1. Electrical Supply Connection
Provide 115 VAC, 60 HZ, 1 PH, 15 AMP service. Bring conduit in through open
frame on the under-side of cabinet. Local codes and/or the National Electrical
Code should be observed in accordance with ANSI/NFPA 70-1987 (or latest
edition). AN ELECTRICAL GROUND IS REQUIRED. The electrical schematic is
located in the service compartment and in this manual. Maximum load is 2
AMPs. In Canada, provide electrical service in accordance with the Canadian
Electrical Code, CSA C22.1 Part 1 and/or local codes.
2. Gas Supply Connection
Connection to the gas supply can be completed with 1/2” NPT pipe or approved
equivalent. Although the immediate connection to the appliance is “ NPT, gas
supply piping must be large enough to provide 90,000 BTU/hr. Supply pressure
must be at least 4.5” W.C. (maximum 14” W.C.) for natural gas or 12” W.C.
(maximum 14” W.C.) for LP gas. In Canada, the installation must conform to the
Canadian Gas Code, CAN 1-B149, Installation Codes for Gas Burning Appliances
and Equipment and/or local codes. After the unit has been connected to the gas
supply, all gas joints must be checked for leaks.
No flame should be used when checking for leaks. A thick soap solution or other
suitable leak detector should be used.
WARNING
THE UNIT MUST BE INSTALLED BY
PERSONNEL WHO ARE QUALIFIED TO WORK
WITH GAS, ELECTRICITY AND PLUMBING.
IMPROPER INSTALLATION CAN CAUSE
INJURY TO PERSONNEL AND/OR DAMAGE
TO THE EQUIPMENT. THE UNIT MUST BE
INSTALLED IN ACCORDANCE WITH
APPLICABLE CODES. THE UNIT MUST BE
INSTALLED BY A LICENSED PLUMBER OR
GAS FITTER WHEN INSTALLED WITHIN THE
COMMONWEALTH OF MASSACHUSETTS.
CAUTION
DO NOT INSTALL THE UNIT WITH THE RIGHT
SIDE VENTS BLOCKED OR WITHIN 12 INCHES
OF A HEAT SOURCE (LIKE A BRAISING PAN,
DEEP FRYER, CHAR BROILER, OR KETTLE).
TO AVOID DRAIN PROBLEMS, LEVEL THE
UNIT FRONT TO BACK, OR PITCH IT
SLIGHTLY TO THE REAR.
Installation
Flue
UNIT
REAR
Electrical
Conduit
Control
Box
UNIT
FRONT
The knockout hole is sized for a one inch
conduit fitting. Pass the wire up the back
through this knockout hole to the front. Make
the connections from the front.

OM-HY/6G 9
Installation
For a unit on casters, complete connection to the gas supply with connectors
that comply with the standard for connectors for moveable gas appliances, ANSI
Z21.69 — latest edition. Restrain movement of the unit by attaching a cable or
chain to the eyelet (provided at the back of the frame) and anchoring the cable or
chain to the wall or floor. Make the length and location of the cable such that the
unit cannot pull on the gas connection while the cable is connected.
3. Water Connection
A back siphonage device (check valve) must be installed in both incoming cold
water lines according to local plumbing code. The water line pressure should be
between 30 and 60 PSI. A pressure regulator is required above 60 PSI. A ¾ inch
NH (garden hose type) connector is required to connect the water supply to the
water inlet valves. The minimum diameter of the water feed line is ½ inch. Use
one washer (or, if necessary, two washers) in the hose connection. Do not allow
the connection to have any leak, regardless of how small.
4. Untreated Water Second Connection
As discussed previously, the flow of water used for steam suppression in
the drain is much greater than the amount of water used to generate steam.
The second connection on steamers (see illustration under “Water Quality &
Treatment” section) permits the installer to supply treated water to the steam
generator and untreated water to the drain. With “split water” feature, the initial
fill requirement for treated water is 3.5 U.S. gallons (19 L) within 2.5 minutes.
The requirement for treated makeup water is 0.12 gallon (0.45 L) per minute per
cavity. A field retrofit kit is available for single water connection if required.
5. Drain Connection
The HY-6G Steamer must be leveled front to back. A 1½ inch (38mm) ID hose
may be attached to the drain pipe (supplied) by means of a hose. DO NOT
CONNECT THE HOSE DIRECTLY TO A BUILDING DRAIN. There must be a free air
gap between the end of the hose and the building drain. The free air gap should
be as close as possible to the unit drain. There must also be no other elbows or
other restrictions between the unit drain and the free air gap.
Do NOT use plastic pipe. The drain must withstand boiling water.
Install the drain line with a constant downward pitch. Do not allow any water
traps in the line. A trap can cause pressure to build up inside the cavity during
steaming, which will make the door gasket leak.

10 OM-HY/6G
Initial Start-Up
After the HY-6G Steamer has been installed, test it to ensure that the unit is operating
correctly.
1.
Remove all literature and packing materials from the interior and exterior of the unit.
2. Make sure the water supply line is open.
3. Make sure that the gas supply line is open and that the manual knob on the
main gas valve is turned to the “on” position. This valve is located behind the
front access panel on the right side of the unit.
4. Turn on electrical service to the unit. The HY-6G will not operate without
electrical power. Do not attempt to operate the unit during a power failure.
5. The steamer will not operate until the pilot burner has been ignited. To light the
pilot burner, activate the pilot switch located next to the main gas valve. When
the pilot ignition sequence has been successfully completed, a green light - on
the pilot switch (old models) - and on the electrical panel (new models) will glow.
6. The “trial for ignition” period is roughly 90 seconds. If the pilot burner does not
light within about 90 seconds after the switch is activated, the ignition system
automatically stops gas flow to the pilot burner and stops the ignition trial. If
this happens, turn off the pilot switch and repeat the trial for ignition. During
the initial start-up, the pilot may require several trials for ignition until all the air
is bled from the gas piping. Subsequent start-ups should require only about 5
seconds to achieve pilot ignition.
NOTE: See Automatic Operation of Pilot at the end of this section.
7. Once the pilot burner flame has been established (the green light on the pilot
switch (old models) or electrical panel (new models) is on), press the “ON” switch
for the desired steamer cavity. The steam generator will fill with water.
NOTE: The door MUST be closed for the main burner to work.
8. When the steam generator has filled with water, the burners will ignite
automatically. Within approximately 8-10 minutes the READY light will come on,
indicating that the water has reached its standby temperature. When the READY
light is displayed, you may take any one of the following steps:
a. Set the timer to the desired time for timed steaming.
b. Turn the timer knob to the manual ON position for continuous steam.
c. Let the unit stay at standby temperature.
9. To shut down the unit, press the ON switch into the off position. The steam
generator will then drain. You may also switch off the pilot switch to conserve
energy.
10. If the HY-6G Steamer behaves as described, the unit is functioning correctly and
ready for use.
WARNING
WHEN YOU OPEN THE DOOR, STAY AWAY
FROM STEAM COMING OUT OF THE UNIT.
THE STEAM CAN CAUSE BURNS.
Automatic Operation of Pilot
Once the pilot burner is lit, it essentially
functions as a standing pilot. In this state,
if the pilot is accidentally extinguished (by
a very strong gust of wind for example), it
will re-ignite automatically. The unit will
completely shut down. Operator must turn
off and then back on to reset. Then the unit
will come back on and resume operation in
the mode and with the (running) timer value
existing just prior to shutdown. The pilot
switch may be turned off during “off hours”
to conserve energy.
After the unit has been running, if the pilot
burner ever fails to re-ignite automatically
within 90 seconds, wait 5 minutes before
you attempt to reactivate it. In the unlikely
event that ignition problems persist, contact
your authorized Groen Service Agency.
NOTE: For operation at high altitudes (2000
feet and above) please consult the Groen
Food Service Engineering Department.

OM-HY/6G 11
Operation
NOTE: Before the steamer can be operated as described in this section, the pilot
burner flame must be established. For details see the Initial Start-Up section and the
Automatic Operation of Pilot on previous page.
A. Controls
Operator controls are on the front right of the unit. The control panel on new
models has the following touch pads and indicator lights:
• The ON/OFF touch pad gets the HyPerSteam ready for use, or shuts it off.
• The READY indicator light shows that the steam generator is at standby
temperature and the cavity is hot enough to begin steaming.
• The DELIME indicator light is lit when the unit is operating in the cleaning
mode.
• The SERVICE indicator light shows when the water level probes have stopped
working, and need to be cleaned (normally an indication of lime deposits).
When one probe is not working, the DELIME light flashes briefly every few
seconds. If both probes fail the SERVICE light will come on continuously and
the beeper will sound.
• The HI TEMP indicator light comes on when the steam generator is too hot.
The unit will automatically shut off, and cannot be turned on again until the
steam generator cools and the HI TEMP indicator light goes out.
• The TIMING indicator light stays on when the timer is running.
• The CLEAN touch pad is used to start the automatic 50 minute cleaning cycle.
The timer is used in three ways:
1. In the OFF position the steam generator stays at a low boil or “holding”
temperature.
2. When a cook time is set, the unit steams until the timer runs down to OFF.
Steaming stops, the DONE light (a red light on older models) comes on and
a beeper sounds.
3. With the timer turned to the ON position, the unit steams continuously. The
green light stays lit. The steamer will not time down.
WARNING
WHEN YOU OPEN THE DOOR, STAY AWAY
FROM THE STEAM COMING OUT OF THE
UNIT. THE STEAM CAN CAUSE BURNS.
WARNING
ALL POTENTIAL USERS OF THE EQUIPMENT
SHOULD BE TRAINED IN SAFE AND CORRECT
OPERATING PROCEDURES.
NO ATTEMPT SHOULD BE MADE TO
OPERATE THIS EQUIPMENT DURING
A POWER FAILURE.
Power
ON/OFF
Button
Power
Indicator
Light
Service
Indicator
Light
Clean
Button
Steamer
Timer
Ready
Indicator
Light
Delime
Indicator
Light
Hi Temp
Indicator
Light

12 OM-HY/6G
Operation
B. Operating Procedure
1. Press the ON switch/pad for the steamer. The steam generator will fill, and
heat until the READY light comes on. (Aprox. 10 minutes.)
2. Load food into pans in uniform layers. Pans should be filled to about the
same levels, and should be even on top.
3. Open the door and slide the pans onto the supports. If you will only be
steaming one pan, put it in the middle position.
4. Close the door. With the READY indicator lit, take one of the following steps:
• If you want to steam the food for a certain length of time, set the timer
for that period. The timer will automatically run the steamer for the
set time and then turn it off. A red light will come on and a beeper will
sound. Steam production stops.
• If you want to steam continuously, turn the timer to the manual ON
position. A green light will come on. The unit will continue steaming until
you stop it by turning the timer to OFF. When steaming continuously YOU
MUST CONTROL STEAMING TIME.
5. Open the door. Remove the pans from the steamer, using hot pads or oven
mitts to protect your hands from the hot pans.
6. To shut down the unit, press the ON/OFF touch pad. The steam generator
will automatically drain.
Power
ON/OFF
Button
Power
Indicator
Light
Service
Indicator
Light
Clean
Button
Steamer
Timer
Ready
Indicator
Light
Delime
Indicator
Light
Hi Temp
Indicator
Light

OM-HY/6G 13
Cleaning
WARNING
DISCONNECT THE POWER SUPPLY BEFORE
CLEANING THE OUTSIDE OF THE STEAMER.
KEEP WATER AND CLEANING SOLUTIONS
OUT OF CONTROLS AND ELECTRICAL
COMPONENTS. NEVER HOSE OR STEAM
CLEAN ANY PART OF THE UNIT.
DON’T MIX DE-LIMING AGENTS (ACID) WITH DE-
GREASERS (ALKALI) ANYWHERE IN THE UNIT.
AVOID CONTACT WITH ANY CLEANERS,
DE-LIMING AGENT OR DE-GREASER AS
RECOMMENDED BY THE SUPPLIER. MANY
ARE HARMFUL. READ THE WARNINGS AND
FOLLOW THE DIRECTIONS!
EVEN WHEN THE UNIT HAS BEEN SHUT OFF,
DON’T PUT HANDS OR TOOLS INTO THE
COOKING CHAMBER UNTIL THE FAN HAS
STOPPED TURNING.
DON’T OPERATE THE UNIT UNLESS THE TWO
REMOVABLE INTERIOR PARTITIONS HAVE BEEN
PUT BACK IN THEIR PROPER LOCATIONS.
DON’T USE ANY CLEANING OR DELIMING
AGENT THAT CONTAINS ANY SULFAMIC
AGENT OR ANY CHLORIDE, INCLUDING
HYDROCHLORIC ACID (HCl). TO CHECK FOR
CHLORIDE CONTENT SEE ANY MATERIAL
SAFETY DATA SHEETS PROVIDED BY THE
CLEANING AGENT MANUFACTURER.
To keep your HY-6G Steamer in proper working order, use the following procedure to
clean the unit. This regular cleaning will reduce the effort required to clean the steam
generators and cavities.
A. Suggested Tools
a. Mild detergent
b. Stainless steel exterior cleaner such as Zepper®
c. Steam generator de-liming agent, such as Groen Delimer Descaler. A liquid
de-liming agent will be easier to use than crystals or powders. See the
warning about chlorides, below
d. De-greaser
e. Cloth or sponge
f. Plastic wool or a brush with soft bristles
g. Spray bottle
h. Measuring cup
i. Nylon pad
j. Towels
k. Plastic disposable gloves
l. Funnel
B. Procedure
1. Outside
a. Prepare a warm solution of the mild detergent as instructed by the
supplier. Wet a cloth with this solution and wring it out. Use the moist
cloth to clean the outside of the unit. Do not allow freely running liquid
to touch the controls, the control panel, any electrical part, or any
open louver.
b. To remove material which may be stuck to the unit, use plastic wool,
a fiber brush, or a plastic or rubber scraper with a detergent solution.
c. Stainless steel surfaces may be polished with a recognized stainless
steel cleaner such as Zepper®.
2. Steam Generator and Cooking Chamber
Regular deliming, depending on your steamer usage and local water
quality, must be done to enhance performance and prolong the life of your
HyPerSteam™ convection steamer. Steamer must be turned off after every
use to prevent lime scale buildup - do not run steamer continuously.
ALWAYS USE HOT PADS OR MITTS WHEN HANDLING HOT STEAMER PAN-
ELS OR RACKS.
RECOMMENDED TOOLS & CLEANERS:
• Groen Delimer/Descaler (Part Number 114800). Do NOT use any
product containing chlorides or sulfamic acid, including hydrochloric
acid.
• Nylon scrub pad, cloth and/or sponge
IMPORTANT
DO NOT USE ANY METAL MATERIAL (SUCH
AS METAL SPONGES) OR METAL IMPLEMENT
(SUCH AS A SPOON, SCRAPER OR WIRE
BRUSH) THAT MIGHT SCRATCH THE SURFACE.
SCRATCHES MAKE THE SURFACE HARD TO
CLEAN AND PROVIDE PLACES FOR BACTERIA
TO GROW. DO NOT USE STEEL WOOL, WHICH
MAY LEAVE PARTICLES IMBEDDED IN THE
SURFACE WHICH COULD EVENTUALLY CAUSE
CORROSION AND PITTING.

14 OM-HY/6G
Cleaning
DELIMING STEPS HY-6G (Use Touch Pad):
STEP 1
Press ON/OFF to turn steamer off. Open door.
STEP 2
Let cavity cool for 5 minutes or longer. While cool, wipe out cavity. Close
door.
STEP 3
Press and hold CLEAN while also turning steamer on by pressing ON/OFF,
until only DELIME and POWER lights remain on (all lights will turn on, then
off, except DELIME and POWER).
STEP 4
After 5 minutes, beeper will beep rapidly, signaling you to add Groen De-
limer/ Descaler. Door(s) must remain closed for entire delime cycle.
STEP 5
Pour 1 pint (2 cups) of delimer PER CAVITY into upper and /or lower delim-
ing port(s) and then close port(s). Press CLEAN. Double-stacked unit cavi-
ties may be delimed together or seperately
STEP 6
Delime cycle will start, taking about 30 minutes. When delime cycle is com-
plete, DELIME light will appear, DONE light will flash and beeper will beep.
STEP 7
Press ON/OFF to turn steamer off. Let cavity cool for 5 minutes or longer.
Open door, wipe out inside of cavity and wipe door gasket. Close door.
STEP 8
To use steamer, press ON/OFF. When READY light appears, steamer is ready
to use.
NOTES:
• If DELIME light flashes rapidly (5 times per second), press DELIME to
restart delime cycle.
• If power outage occurs during deliming, delime cycle must be re-
started. Press DELIME.
• For best performance, do not interrupt delime cycle. If delime cycle
must be stopped, press ON/OFF to turn on. Set timer for 5 minutes.
After beeper beeps, press ON/OFF to turn off. Let cavity cool for 5
minutes or longer, carefully open door(s) and wipe out cavity com-
pletely.
CAUTION
NEVER LEAVE A CHLORINE SANITIZER IN
CONTACT WITH STAINLESS STEEL
SURFACES FOR LONGER THAN 30
MINUTES. LONGER CONTACT CAN
CAUSE CORROSION.
Deliming
Port

OM-HY/6G 15
Maintenance
The HY-6G Steamer is designed for minimum maintenance, and no user adjustments
should be necessary. Certain parts may need replacement after prolonged use. If
there is a need for service, only Groen personnel or authorized Groen representatives
should perform the work. Always supply water with a low mineral count that meets the
standards outlined in the Water Conditioning section of this manual.
If steam or condensate is seen leaking from around the door, take the following steps:
1. Check the door gasket. Replace if it is cracked or split.
2. Inspect the cooking chamber drain to be sure it is not blocked.
3. Adjust the latch pin to allow for changes that might occur as the gasket ages.
a. Loosen the lock nut at the base of the latch pin. Turn the latch pin ¼ turn
clockwise, and re-tighten the lock nut.
b. After adjustment, run the unit to test for further steam leakage.
c. If there is still leakage, repeat the adjustment.
d. Continue adjusting the pin clockwise until the door fits tightly enough to
prevent leakage.
NOTE
THE UNIT CONTAINS NO FUSES THAT SHOULD
BE REPLACED BY THE OPERATOR.

16 OM-HY/6G
Troubleshooting
This Groen Steamer is designed to operate smoothly and efficiently if properly maintained. However, the following is a list of
checks to make in the event of a problem. Wiring diagrams are furnished inside the service panel. If an item on the check list
is marked with (X), it means that the work should be done by a factory-authorized service representative.
SYMPTOM WHO WHAT TO CHECK
Pilot will not light. User a. Are electrical connections made with a ground?
b. Is gas supply connection made?
c. Is pilot ignition switch on?
d. Is gas valve turned on?
e. Are building fuses or circuit breakers all right?
f. Are there drafts which could blow out the pilot?
Authorized
Service Rep Only
g. Is spark ignition cable connected to module? X
Steam generator does not ll
with water.
User a. Is the ON switch depressed?
b. Is the water supply connected?
c. Is the water turned on?
d. Check for low water pressure (less than 30 PSI or 210 kPa).
e. Is the screen at the water connection clogged?
f. Has the steam generator been delimed?
No steam. User a. Is the ON switch depressed?
b. Is the water supply connected?
c. Is the water turned on?
d. Are steamer doors open?
e. Is the steam generator limed up?
Red light comes on after four
minutes.
User a. Is the water supply connected?
b. Is the water turned on?
c. Has the unit been delimed? (Refer to Cleaning Section)
Excessive steam escaping
from rear of unit.
User a. Is the water spray hose kinked or obstructed?
Authorized
Service Rep Only
b. Is the water spray solenoid connected? X
c. Is the drain properly vented? X

OM-HY/6G 17
Parts List
External Cabinet & Sheet Metal
To order parts, contact your authorized Groen Service Agency. Supply the model designation,
part description, part number, quantity, and where applicable, voltage and phase.
Key Description Part #
1 Lower Side Panels 096848
2 Lower Front Panel 096720
3Adjustable Table Leg 042505
4Door Assembly 130858
5 Door Handle 129723
6 Door Gasket 124849
7 Left Pan Rack 094148
8 Blower Cover/Rack 096788
9 Door Locking Pin 078914
9a Door Pin Lock Nut 003823
10 Timer 096826
11 Timer Knob 123100
12 Mylar Overlay Plate 123128
13 Flue Cover 096765
14 Flue 096854
15 Vent Pipe 141346
16 Upper Right Side Panel 123183
17 Top Side Cover 096732
18 Lower Back Panel 096785
19 Sink Drain Fitting 099943
20 Upper Left Panel 123184
21 Top Panel 123182
22 Back Panel 125799
1
6
5
4
5
6
25 22 726 811
10
9, 9a
16
17
12, 13
14
15
24
OLD MODEL
23
21
18
19
20
27
23
NEW MODEL

18 OM-HY/6G
Parts List
Cavity Control Section
Key Description Part #
x Top Cover Clip 123156
2 Timer 096826
x Door Switch 096857
4Ready Thermostat 088865
5 Steam Port 141366
6Steam Hose, Top 141461
7 Steam Hose, Bottom 141462
8 1d” Hose Clamp 127525
9 Fan Motor 096740
10 Motor Capacitor 096812
11 Control Board 141082
12 Light & Timer PC Board
Assembly
137233
13 Cover, Control Panel 119806
14 Chassis, Trfmr/Capacitor
Assembly
119864
x = not shown
14
7
8
12
10
11
2
13
9
4 65

OM-HY/6G 19
Key Description Part #
xAdjustable Table Leg 042505
2 Gas Switch 087951
3Main Gas Valve:
Natural Gas
Propane Gas
098443
098444
x Alternate Main Gas Valve 099988
5 Outer Steam Generator Assy 141618
6 Inner Steam Generator Assy 141618
x Water Fill Hose 096772
8 Water Level Probe, Right
Water Level Probe, Left
141285
141424
xHigh Limit Thermostat 096892
10 Terminal Block 003887
11 Igniter Module 085153
12 120/24 Volt Transformer 121716
5
3
12
2
11
10
68
Key Description Part #
1 Inner Gas Manifold 141499
2 Outer Gas Manifold 141348
3 Igniter Cable 096728
4 1/2” Outer High Heat Tube 141338
5 1/2” Inner High Heat Tube 141339
6 Outer Flue 096854
7 Inner Flue 096854
xSteam Generator Drain Valves 074594
x Inner Generator Drain Hose 141467
x Outer Generator Drain Hose 141466
x Steam Generator Drain Hose
Clamps
095656
12 Drain Box 140859
13 Upper Cavity Drain Hose 141490
14 Lower Cavity Drain Hose 141491
x Cavity Drain Hose Clamp 126011
16 Vent Pipe 141346
x Water Inlet Valve 3 Outlet 090827
18 Pilot Burner - Natural Gas 096705
x Pilot Burner - Propane Gas 096706
19
Water Inlet Valve (Treated Water) 071235
20
Water Inlet Valve (Untreated
Water)
100934
x = not shown
2
4
6
7
14
16
13
12
17 1 3 5
19 20

20 OM-HY/6G
Parts List
Steam Motor & Controls
Key Description Part #
1 Fan Motor w/Mounting Plate 096740
2 Motor Shaft Seal 096868
3 Motor Insulator 094135
4Fan 096790
5 Timer 096826
6 Control Board 141082
7 Timer Knob 123100
8 Door Switch 096857
9 Steam Port Kit* 141617
10 Ready Thermostat 088865
11 Steam Port Gasket 099250
12 Timer Fastener Nut 101145
* = Includes steam port, ready thermostat and
steam port gasket 810
9
2 3
75
14
1
4
13
6
12