Groen CC10-E, (2)CC/0-E, C/2-20-E, (2)C/2-20E Service Manual
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(2)C/2-20EFC
CC10-E
OPERATOR MANUAL OM-CC-E and C/2-E
Part Number 121085 DOMESTIC
MODELS: CC10-E, (2)CC/0-E,
C/2-20-E, (2)C/2-20E
CONVECTION COMBO™
Combination Steamer-Oven
THIS MANUAL MUST BE RETAINED FOR FUTURE REFERENCE. READ,
UNDERSTAND AND FOLLOW THE INSTRUCTIONS AND WARNINGS
CONTAINED IN THIS MANUAL.
FOR YOUR SAFETY
DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND
LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE
.
OPERATOR MANUAL
Part Number 121085 Rev. B
OM-CC-E and C/2-E
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.
CAUTION: SHIPPING STRAPS ARE UNDER TENSION AND CAN SNAP BACK WHEN CUT.
CAUTION: 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.
CAUTION: LEVEL THE UNIT FRONT TO BACK, OR PITCH IT SLIGHTLY TO THE REAR, TO AVOID
DRAINAGE PROBLEMS.
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 DRAIN IS HAZARDOUS.
IMPORTANT: IMPROPER DRAIN CONNECTION WILL VOID WARRANTY.
IMPORTANT: 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.
WARNING: WHEN YOU OPEN THE DOOR, STAY AWAY FROM STEAM COMING OUT OF THE UNIT.
STEAM CAN CAUSE BURNS.
WARNING: BEFORE CLEANING THE OUTSIDE OF THE OVEN, 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 CHAMBER 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).
WARNING: DO NOT PUT HANDS OR TOOLS INTO THE COOKING CHAMBER UNTIL THE FAN HAS
STOPPED TURNING.
WARNING: DO NOT OPERATE THE UNIT UNLESS THE REMOVABLE RIGHT SIDE PANEL HAS BEEN
RETURNED TO ITS PROPER LOCATION.
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: DO NOT USE ANY 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 RESULT IN BODILY
INJURY TO THE OPERATOR AND DAMAGE THE EQUIPMENT. SERVICE BY OTHER THAN
FACTORY-AUTHORIZED PERSONNEL WILL VOID ALL WARRANTIES.
WARNING: HIGH VOLTAGE EXISTS INSIDE CONTROL COMPARTMENTS. DISCONNECT FROM BRANCH
BEFORE SERVICING. FAILURE TO DO SO CAN RESULT IN SERIOUS INJURY OR DEATH.
OM-CC-E and C/2-E
2
OM-CC-E and C/2-E
Table of Contents
OPERATOR WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
EQUIPMENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSPECTION AND UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
WATER QUALITY AND TREATMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
INSTALLATION AND START-UP INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
DIAGRAMS AND SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
SERVICE LOG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
References
UNDERWRITERS LABORATORIES, INC.
333 Pfingsten Road
Northbrook, Illinois 60062
KLENZADE SALES CENTER
ECOLAB, Inc.
370 Wabasha
St. Paul, Minnesota 55102
800 328-3663 or 612 293-2233
NATIONAL FIRE PROTECTION
ASSOCIATION
60 Battery March Park
Quincy, Massachusetts 02269
NFPA/70 The National Electrical Code
NATIONAL SANITATION FOUNDATION
3475 Plymouth Road
Ann Arbor, Michigan 48106
OM-CC-E and C/2-E
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OM-CC-E and C/2-E
Equipment Description
Your Groen Convection Combo™ has a stainless
steel cooking chamber, an air heating compartment
with electric heating elements and fan, a steam
generator with electric heating elements, and a
control compartment which houses other electrical
components.
All major components of the Convection Combo™
are encased in a 16 gauge stainless steel cabinet.
Glass fiber insulation, lines the cabinet at a thickness
of 1½ to 2 inches (4 to 5 cm). A removable drip tray
is located beneath the door.
The door is reversible so that it may open from the left
or right side. Operator controls are located on the right
side of the front panel.
Standard controls let you to operate the Convection
Combo in any one of three cooking modes:
3. As a convection oven
4. As a self-contained, pressureless steamer
5. As a combination oven-steamer
CC10-E and C/2-20E models differ in cooking
chamber size and capacity:
CC10-E: 4 steam table pans (12x20x2½”), or
7 half-size (13x18") US bake pans
C/2-20E: 10 steam table pans (12x20x2½”), or
9 full-size (18x26") US bake pans
The smaller Convection Combo™ is available as a
table-top unit (the single CC10-E). These units are
also supplied on a stainless steel stand as models
CC10-EF and (2)CC10-EF. The larger Convection
Combo™ is always supplied with a stand as the
single C/2-20EF or the double-stacked (2)C/2-20EF.
CC-10EF
(2)CC10-EF
C/2-20EFC with optional pan rack
OM-CC-E and C/2-E
4
OM-CC-E and C/2-E
Inspection and Unpacking
Your Convection Combo™ will be completely
assembled in a heavy shipping carton or wooden
crate, and attached to a skid. On receipt, inspect the
carton or crate carefully for exterior damage.
CAUTION
SHIPPING STRAPS ARE UNDER TENSION AND
CAN SNAP BACK WHEN CUT.
Carefully cut the straps around the carton and detach
the sides of the carton from the skid. Pull the carton up
off the unit. Be careful to avoid personal injury or
equipment damage from staples which might be left in
the carton walls.
Write down the model number, serial number and
installation date and keep this information for future
reference. Space for these entries is provided at the top
of the Service Log in the back of this manual.
CAUTION
THIS UNIT IS VERY HEAVY. YOU SHOULD GET
HELP AS NEEDED TO LIFT THIS WEIGHT
SAFELY.
When starting installation, lift the unit straight up off
the skid. Check packing materials to make sure loose
parts are not discarded with the material.
Water Quality and Treatment
It is essential to supply the steam generator/boiler
with water that will not form scale. Even though the
steam generator/boiler is engineered to minimize
scale formation, scale development depends on the
hardness of your water and the number of hours you
operate the equipment each day.
But most water supplies contain minerals which form
scale. It is this scale which could lead to an early
component failure.
Your local water utility can tell you about the minerals
in your water. The water going to the steam
generator should have between 30 and 40 parts per
million (ppm) total dissolved solids (TDS) and should
have a pH (acidity rating) of 7.0 to 9.0. Please follow
these simple precautions:
1. The best way to prevent scale is to use a Groen
Puresteam™ Water Treatment System which has
been specifically designed for Groen steamers
and combination ovens. Do not rely on
unproven water treatments systems sold for
scale prevention and removal. They are not
specifically designed to work with Groen
steamers and combination ovens.
2. A well-maintained water treatment system and a
regular cartridge replacement schedule is
essential.
3. Using a Groen Water Treatment System will
provide longer steam generator/boiler life, higher
steam capacity, and reduce maintenance
requirements.
4. If you notice a slowdown in steam production or
an increase in deliming, have the combo checked
for scale build-up. This could be an indication
that the water treatment cartridges need
replacing. Heavy scale reduces the unit’s ability
to boil water, and can even cause component
failure.
MINIMIZE SCALE PROBLEMS BY INSTALLING
AND MAINTAINING A GROEN PURESTEAM™
WATER TREATMENT SYSTEM AND BY DELIMING
THE STEAM GENERATOR/BOILER REGULARLY.
Groen Convection Combo™ ovens feature two
separate water inlets — one for the steam
generator/boiler (for treated water), the other for the
spray condenser (untreated water). The second
intake will reduce treatment requirements resulting in
significant savings.
The dual water connections are on the rear of the unit.
Standard water connections for steam
generator and drain spray condenser.
OM-CC-E and C/2-E
5
OM-CC-E and C/2-E
Installation and Start-Up
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.
CAUTION
DO NOT INSTALL THE UNIT WITH THE RIGHT SIDE VENTS BLOCKED OR WITHIN 12 INCHES OF A HEAT
SOURCE (SUCH AS A BRAISING PAN, DEEP FRYER, CHAR BROILER OR KETTLE). DO NOT INSTALL TO
THE LEFT OF ANY OPEN-FLAME EQUIPMENT.
DO NOT INSTALL WITHIN FOUR FEET OF A STEAM DRAIN.
TO AVOID DRAINAGE PROBLEMS, LEVEL THE UNIT FRONT TO BACK.
INSTALLATION MUST BE IN ACCORDANCE WITH ALL APPLICABLE CODES.
1. Mounting
Minimum rear clearance is 6" from back wall.
If you wish to install a Convection Combo™ on
top of another, you should obtain a double
stacked unit from the factory.
If the unit does not have a factory-installed stand,
the installer must provide a table, stand or counter
which is strong enough to support the unit. Use
of casters is not recommended.
To avoid drainage problems, level the unit front to
rear, or provide a slight pitch to the rear.
Bolt the unit to the table, stand or counter top,
using the mounting holes in its base.
2. Electrical Supply Connections
b. Panel Removal
The right side panel must be removed to gain
access to the wiring and control
compartment. Remove the two screws at the
bottom of the panel. Slide the panel toward
the front of the unit, lift it and set it aside.
c. Supply Voltage
CC10-E and C/2-20E models must operate at
the rated nameplate voltage, plus or minus
10%.
d. Terminal block
The terminal block for incoming power is
located at the back of the control
compartment.
WARNING
WHEN CONNECTING FOR SINGLE PHASE
OPERATION, DO NOT CONNECT ANY WIRE TO
LINE 3 (THE TERMINAL FARTHEST LEFT). THIS
WILL CAUSE A SHORT CIRCUIT.
OM-CC-E and C/2-E
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OM-CC-E and C/2-E
FOR CC10-E Models:
The ground terminal is found on the relay
bracket below the terminal block. The
Convection Combo™ must have a separate
ground wire for safe operation. The ground
wire must be at least 10 AWG (2.6 mm).
FOR C/2-20E Models:
The ground terminal is found below the
terminal block. The Convection Combo™
must have a separate ground wire for safe
operation. The ground wire must be at least
8 AWG (3.3 mm) for a 100 amp circuit
breaker or 10 AWG (2.6 mm) for a 40 to 60
amp breaker.
e. Supply Wire
The type of wire needed is determined by
finding the operating voltage and phase from
the unit’s back data plate and (on pre-1996
models) phase select connector. Refer to the
“Electrical Supply Connection” label on the
back of the unit for correct wire size and
insulation temperature rating.
The specified wire must be used to comply
with Underwriters Laboratories and National
Electric Code requirements.
The knockout hole is sized for a ¾ inch (19
mm) conduit fitting in CC10-E models, and
one inch (25.4 mm) for C/2-20E models.
ELECTRICAL SUPPLY CONNECTION
(All wires copper only.
Reference: National Electrical Code)
CC10-E MODELS
Voltage Phase Wire Size Insulation
208 1 6AWG (4.1mm) 75
o
C
208 1 8AWG (3.3mm) 90
o
C
208 3 8AWG (3.3mm) 75
o
C
240 1 8AWG (3.3mm) 75
o
C
240 3 8AWG (3.3mm) 75
o
C
C/2-20E MODELS
Voltage
Size fo 75°C
(THWN)
Size for 90°C
(TWHN)
208 4 AWG (5.2 mm) 6 AWG (4.1 mm)
240 4 AWG (5.2 mm) 6 AWG (4.1 mm)
480 8 AWG (3.3 mm) 8 AWG (3.3 mm)
f. Branch Circuit Protection
Groen strongly recommends that each
Convection Combo™ have its own branch
circuit protection. A double -stacked unit
should have separate protection for the
upper and lower steamer-ovens.
CURRENT DEMAND
CC10-E MODELS
Voltage
Current
Power
1 Phase 3 Ph., per Line
208 44.7 A 27.5 A 9.3 KW
240 38.8 A 24.1 A 9.3 KW
C/2-20E MODELS
Voltage
Current per line
(Three Phase)
Power
208 65.4 A 21 KW
240 56.7 A 21 KW
480 28.3 A 21 KW
Each current-carrying conductor must have
overcurrent protection. Refer to the label on
the back of the unit for proper wire size and
type. Watertight connections are required.
3. Water Supply Connection
A check valve (back siphonage device) must be
installed in the incoming cold water lines in
keeping with local plumbing codes. Water line
pressure should be between 30 and 60 PSI (210
and 410 kPa). A pressure regulator is required
above 60 PSI (410 kPa).
A ¾ inch (19 mm) NH (garden hose type)
connector is required to connect the water supply
to the water inlet valve. The water feed line
diameter may not be less than ½ inch (13 mm).
Use a washer (or if necessary, two washers) in
the hose connection. Do not allow the connection
to have any leak, no matter how small.
The CC10-E and C/2-20E are equipped with a
dual water supply. Treated water must be
supplied at a minimum rate of 1.5 gallons per
minute. Untreated water must be supplied at a
minimum rate of .34 gallons per minute for the
CC10-E and .75 gallons per minute for the
C/2-20E. Minimum water pressure for both the
CC10-E and C/2-20E is 30 PSI. Double-stack
units require doubled rates. To convert a steamer
or combination oven to a single water connection,
order single cold water adapter (part # 138473).
4. Drain Connection
a. CC10-E and C/2-20E Without Drain Tank
(tabletop model)
A 1.5" hose for 10-E models or a 2" hose for
20-E models may be attached to the provided
OM-CC-E and C/2-E
7
OM-CC-E and C/2-E
Drain TankDrain Tank
drain elbow with a clamp. Do not use plastic
pipe. The drain must withstand boiling water.
WARNING
:
DO NOT CONNECT THE DRAIN 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’s drain.
There must also be no other elbows or other
restrictions between the unit drain and the two
inch free air gap.
CAUTION
DO NOT USE PLASTIC PIPE. DRAIN MUST BE
RATED FOR BOILING WATER.
WARNING
BLOCKING THE DRAIN IS HAZARDOUS.
Install the drain line with a constant
downward pitch. This is especially important
for double-stack units. The bottom unit is
conceptually shown below.
IMPORTANT: 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.
����2 in (50mm)
NOTE: Improper drain connection will void the
warranty.
b. CC10-E and C/2-20E With Drain Tank
CC10-E Models:
A 1½ inch (4 cm) ID hose may be attached to
the supplied drain elbow with a clamp.
C/2-20E Models:
A two inch (51 cm) ID hose may be attached
to the supplied drain elbow with a clamp.
The hose may be connected directly to a
building drain since the drain tank has an air
vent, which eliminates the need for a free air
gap at the building drain. Do not block the air
vent in any way. Do not attach anything to
the vent tube or reduce its size.
Do NOT use plastic pipe in the drain line,
because the drain must withstand boiling
water.
Tabletop Model
Drain Tank
OM-CC-E and C/2-E
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