C24GA SERIES
GAS CONVECTION
STEAMERS
MODELS
C24GA6 ML-136021
C24GA10 ML-136022
INSTALLATION &
OPERATION MANUAL
For additional information on Vulcan-Hart or to locate an authorized parts
and service provider in your area, visit our website at www.vulcanhart.com
VULCAN-HART
DIVISION OF ITW FOOD EQUIPMENT GROUP, LLC
WWW.VULCANHART.COM
3600 NORTH POINT BLVD.
BALTIMORE, MD 21222
F-35423 Rev A. (08-06)
C24GA SERIES GAS CONVECTION STEAMERS
IMPORTANT FOR YOUR SAFETY
THIS MANUAL HAS BEEN PREPARED FOR PERSONNEL QUALIFIED TO INSTALL
GAS EQUIPMENT, WHO SHOULD PERFORM THE INITIAL FIELD START-UP AND
ADJUSTMENTS OF THE EQUIPMENT COVERED BY THIS MANUAL.
POST IN A PROMINENT LOCATION THE INSTRUCTIONS TO BE FOLLOWED IN THE
EVENT THE SMELL OF GAS IS DETECTED. THIS INFORMATION CAN BE OBTAINED
FROM THE LOCAL GAS SUPPLIER. IN THE EVENT OF A POWER FAILURE, DO NOT
ATTEMPT TO OPERATE THIS DEVICE.
IMPORTANT
IN THE EVENT A GAS ODOR IS DETECTED, SHUT
DOWN UNITS AT MAIN SHUTOFF VALVE AND
CONTACT THE LOCAL GAS COMPANY OR GAS
SUPPLIER FOR SERVICE.
FOR YOUR SAFETY
DO NOT STORE OR USE GASOLINE OR OTHER
FLAMMABLE VAPORS OR LIQUIDS IN THE VICINITY
OF THIS OR ANY OTHER APPLIANCE.
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.
© VULCAN-HART, 2006
IN THE EVENT OF A POWER FAILURE, DO NOT
ATTEMPT TO OPERATE THIS DEVICE.
— 2 —
C24GA SERIES GAS CONVECTION STEAMERS
TABLE OF CONTENTS
IMPORTANT FOR YOUR SAFETY ............................................................................................................ 2
INTRODUCTION ........................................................................................................................................4
GENERAL ............................................................................................................................................ 4
UNPACKING ........................................................................................................................................ 4
INSTALLATION .................................................................................................................................... 4
INSTALLATION CODES AND STANDARDS....................................................................................... 4
LOCATION - GAS STEAMERS ........................................................................................................... 5
LEVELING AND ANCHORING ............................................................................................................ 5
PLUMBING CONNECTIONS ............................................................................................................... 6
Water Requirements ......................................................................................................................6
Water Treatment ............................................................................................................................. 6
Water Supply Connection .............................................................................................................. 6
Filter System .................................................................................................................................. 6
Drain Connection ........................................................................................................................... 7
GAS SUPPLY CONNECTION.............................................................................................................. 7
Gas Connection Data ..................................................................................................................... 9
Testing The Gas Supply System .................................................................................................. 10
FLUE GAS EXHAUST........................................................................................................................ 10
ELECTRICAL CONNECTION ............................................................................................................ 11
ELECTRICAL DATA ........................................................................................................................... 11
START UP .......................................................................................................................................... 11
OPERATION ............................................................................................................................................. 12
LIGHTING AND SHUTDOWN INSTRUCTIONS ............................................................................... 12
Lighting ......................................................................................................................................... 12
Shutdown...................................................................................................................................... 12
COMPARTMENT CONTROLS ..........................................................................................................12
STARTUP PROCEDURE ................................................................................................................... 13
PREHEATING .................................................................................................................................... 13
OPERATING ....................................................................................................................................... 13
STEAMING ......................................................................................................................................... 13
EXTENDED SHUTDOWN ................................................................................................................. 13
CLEANING ......................................................................................................................................... 14
Cooking Compartment Drains......................................................................................................14
Draining Generator ....................................................................................................................... 14
Compartments .............................................................................................................................. 14
Door Gaskets ...............................................................................................................................14
LEAVE COMPARTMENT DOORS OPEN ......................................................................................... 15
GUIDELINES FOR MAINTAINING STAINLESS STEEL SURFACES ..............................................15
MAINTENANCE .......................................................................................................................................16
Water Treatment System ............................................................................................................. 16
Scale Related Maintenance ......................................................................................................... 16
Draining Generator ....................................................................................................................... 16
Generator Pressure Relief Valve .................................................................................................16
Door Gaskets ...............................................................................................................................16
Flue ............................................................................................................................................... 16
COOKING CHART ...................................................................................................................................17
PRODUCTS TO BE COOKED IN SOLID PANS ............................................................................... 17
PRODUCTS TO BE COOKED IN PERFORATED PANS.................................................................. 18
COOKING HINTS ............................................................................................................................... 19
TROUBLESHOOTING .............................................................................................................................20
SERVICE AND PARTS INFORMATION ............................................................................................ 20
— 3 —
C24GA SERIES GAS CONVECTION STEAMERS
INTRODUCTION
GENERAL
Vulcan convection steamers are produced
with quality workmanship and material. Proper
installation, usage and maintenance will result
in many years of satisfactory performance.
It is suggested that you thoroughly read this
entire manual and carefully follow all of the
instructions provided.
Model C24GA6 can accommodate three
1
/2 " deep (64 mm) steam pans per
2
compartment. Model C24GA10 can
1
accommodate five 2
/2" deep (64 mm) steam
pans per compartment.
The C24GA6 and C24GA10 gas-fired
convection steamers are designed for cooking
vegetables, eggs, and other foods, in
commercial kitchens. Each compartment has
a 0 to 60 minute timer. (The buzzer requires
manual shutoff.) The steamers are equipped
with a cabinet base for floor installation.
C24GA6 C24GA10
Compartments 2 2
Total Number of
1
/2" (64 mm) 6 10
2
Deep Pans
Gas Rating 125,000 125,000
BTU/hr. BTU/hr.
UNPACKING
This steamer was inspected and tested before
leaving the factory. The transportation
company assumes full responsibility for safe
delivery upon acceptance of the shipment.
Immediately after unpacking, check for
possible shipping damage. If steamer damage
is found, save the packaging material and
contact the carrier within 15 days of delivery.
INSTALLATION
INSTALLER: A manometer (digital or incline
tube) capable of reading pressure in 0.01"
W.C. is required to install this steamer. Failure
to set blower air and gas pressure correctly
will result in burner and lighting failure.
Before installing, verify that the type of gas
(natural or propane) and the electrical supply
required agree with the specifications on the
data plate located on the left edge of the
tabletop. If the supply and equipment
requirements do not agree, do not proceed
with the installation. Contact your dealer or
Vulcan-Hart immediately.
INSTALLATION CODES AND
STANDARDS
In the United States, the Vulcan steamer must
be installed in accordance with:
1. State and local codes.
2. National Fuel Gas Code, ANSI-Z223.1/
NFPA #54 (latest edition). This shall include
but not be limited to: NFPA #54 Section
10.3.5.2 for Venting.
Copies may be obtained from The American
Gas Association Accredited Standards
Committee Z 223, @ 400 N. Capital St. NW,
Washington, DC 20001 or the Secretary
Standards Council, NFPA, 1 Batterymarch
Park Quincy, MA 02169-7471.
3. National Electrical Code, ANSI/NFPA No.
70 (latest edition) available from the
National Fire Protection Association,
Batterymarch Park, Quincy, MA 02269.
Vapor Removal from Cooking Equipment,
4.
NFPA-96 (latest edition) available from NFPA.
— 4 —
C24GA SERIES GAS CONVECTION STEAMERS
In Canada, the steamer must be installed in
accordance with:
1. Local codes.
2. National Fuel Gas Code, CAN/CSA-B149.1
(latest edition) available from the Canadian
Standards Association, 5060 Spectrum Way,
Mississauga, Ontario, Canada L4W 5N6.
3. Canadian Electrical Code, CSA C22.2 (latest
edition) available from the Canadian
Standards Association, 5060 Spectrum Way,
Mississauga, Ontario, Canada L4W 5N6.
LOCATION - GAS STEAMERS
The equipment area must be kept free and
clear of combustible substances.
The recommended clearance for proper
operation is 36" (914 mm) at the front. The
required clearance from combustible or noncombustible construction is 0" at the sides
and back. The recommended clearance for
service access is 18" (457 mm) at the sides
and 6" (152 mm) from the back.
ventilating system. If you have any questions,
contact the ventilation system installer.
An exhaust system should be located directly
above the steamer to exhaust steam, flue
exhaust and heat generated by the steamer.
Do not locate the steamer directly over a
drain.
LEVELING AND ANCHORING
Position the steamer in its final installed
location. Place a level on the horizontal area
of the cabinet. Adjust the feet to level the
steamer in both the left-to-right and front-torear directions.
Steamers should be elevated in the front just
enough, about
proper draining. Do this by rotating the
adjustable feet in the proper direction 1 to 1
turns after leveling. Check drainage in the
steamer compartments by pouring a small
amount of water in the compartment. All the
water should drain.
1
/16" to 1/8" (2 to 3mm) to give
1
/2
Make sure there is an adequate supply of air
in the room to replace air taken out by the
The rear feet have holes in the flanges for
anchor bolts.
— 5 —
C24GA SERIES GAS CONVECTION STEAMERS
PLUMBING CONNECTIONS
WARNING: PLUMBING CONNECTIONS
MUST COMPLY WITH APPLICABLE SANITARY, SAFETY
AND PLUMBING CODES.
Water Requirements
Proper water quality can improve the taste of
the food prepared in the steamer, reduce
liming in the steam generator and extend
equipment life. Local water conditions vary
from one location to another. Ask your
municipal water supplier for details about your
local water supply prior to installation.
Presence of sediment, silica, excess chlorides
or other dissolved solids may lead to a
recommendation for alternate form(s) of water
treatment. Test the water with a TDS meter or the
test strip included with the steamer. Other factors
affecting steam generation are iron content,
amount of chloridation and dissolved gases.
Water Treatment
A local water treatment specialist should be
consulted before installation of steam
generating equipment.
Supply Pressure 20 - 60 psig
Hardness* less than 3 grains
Silica less than 13 ppm
Total Chlorine less than 4.0 ppm
PH range 7 - 8
Undissolved Solids less than 5
microns
*17.1 ppm = 1 grain of hardness
If the water supply fails to meet these
standards, it will be necessary to install a
water conditioner on the generator water feed.
The use of strainers or filters will not remove
minerals from the water.
Water Supply Connection
Connect the treated cold water supply line to
3
/8" NPT inlet at the rear of the steamer.
the
Connect the untreated cold water supply line
1
to the
/8" NPT, also at the rear of the steamer.
NOTE: Models manufactured after June 2006
3
may have
/4" hose connections.
A water filter system is recommended for the
water supply line going to the treated water inlet
of your steamer. Follow the recommendations
for use and installation instructions shipped
with the water filter. If a water filter is not
installed, the steamer or steam generator
warranty will be limited.
Filter System
If you decide to not install a scale reducing
filter system designed for steam equipment
or use another manufacturer’s system other
than recommended by Vulcan Hart, please
use these guide lines.
• If you are going to delime the unit with a
deliming agent recommended for a
pressure steam boiler and stainless steel
generators and you are on city or treated
well water, you still must have a carbon
block filter installed and maintained.
Carbon block filters remove the chlorine
and chloramines disinfectants from the
water. Chlorine and chloramines will erode
the boiler or steam generator and will
result in a vessel failure which is not
covered under warranty.
• Water feed lines to the steamer must be
flushed before final connection. Particles
in the water could build up in the water and
steam valves or clog tubing and
components that maintain the water level
and pressure in the boiler or steam
generator. If the water supply is not free of
sediment or cloudy after several minutes
of flushing, a sediment filter must be
installed before use.
— 6 —
• If you have purchased water filter system
from Vulcan Hart, please follow the
C24GA SERIES GAS CONVECTION STEAMERS
instructions provided with the filter system.
At the time of installation you must register
your steamer at
www.vulcanhart.com/
filterreg or use the reply card supplied
with your unit. You will need to register
your steamer at each filter change to insure
your standard and extended warranty is
maintained.
Drain Connection
1
The 1
/2" NPT threaded fitting on the condenser
box must be extended a minimum of 12" (305
mm) - maximum of 72" (1829 mm) away from
steamer base, to an open air gap type drain.
1
Do not reduce the 1
/2" NPT drain piping
throughout its length. Provide a suitable floor
sink with a minimum depth of 12" (305 mm).
The floor sink is NOT to be directly under the
steamer and should be at a distance so that
steam vapors will not enter the steamer from
underneath. The drain should slope down
1
away from the steamer
/4" for every foot of
drain pipe length. The drain pipe should be
either iron or copper. DO NOT use PVC pipe;
PVC pipe may lose its rigidity or glue may fail.
GAS SUPPLY CONNECTION
All gas supply connections and any pipe joint
compound used must be resistant to the action
of propane gas. A
diameter gas supply line is required. If quick
disconnect devices are used, make sure it is
sized properly for data plate BTU/hr. rating.
Refer to quick connect supplier’s data sheet.
Codes require that a manual gas shutoff valve
be installed in the gas line ahead of the
steamer.
The gas line must be capable of delivering gas
to the generator without excessive pressure
drop at the minimum rate specified on the
rating plate.
Check blower air pressure at gas manifold
pressure tap by shutting off the gas valve. Air
pressure at cold start-up should be 0.35" W.C.
(0.09 kPa) (cold condition). After 15 minutes,
air pressure should be between 0.40" W.C.
(0.1 kPa) and 0.50" W.C. (0.13 kPa) (hot
condition). Turn the air pressure adjust screw
clockwise to increase pressure and
counterclockwise to reduce pressure.
3
/4" NPT minimum inside
In order to avoid any back pressure in the
steamer, do not connect solidly to any drain
connection.
Temperatures in the generator can briefly
reach as high as 212°F (l00°C). Local codes
may require that the temperature of drain
water be no greater than 140°F (60°C). At the
end of the day, when purging the generators,
some provision for lowering the water
temperature must be provided by the user or
installer to meet this code requirement.
3
Gas Input:
/4" NPT
Natural: 5" _ 10.5" W.C.
Propane: 11" _ 13" W.C.
Inadequate gas supply could result in burner
noise and poor burner performance.
Refer to the instruction manual supplied with
the machine for INSTALLATION CODES AND
STANDARDS and GAS CONNECTION
information.
— 7 —
C24GA SERIES GAS CONVECTION STEAMERS
Air˚Pressure˚
Adjust˚Screw
On˚Side˚of˚
Drip˚Cover
flexible gas connector is used, do not
twist, kink or excessively flex the
connector beyond a U shape. Flexing
the gas connector as described will
restrict gas flow or may damage the
connector.
Changing a flexible gas connector may raise
the BTU/hr. flow capacity enough to allow the
machine to operate within its design
specifications. (i.e. Removing the quick
disconnect fitting, installing a shorter gas
connector or installing a larger diameter gas
connector.)
An alternative may be to move the equipment
to a different gas supply location in the kitchen.
(i.e. Closer to the main supply into the kitchen
or away from other equipment with high
BTU/hr. input requirements.)
Figure 1
The proper sizing and installation of the gas
connection is important for the machine to
operate within its design specifications. In
some installations, the gas supply may not be
sufficient enough to allow all the gas equipment
to operate properly at peak loads; or when
other equipment with a high BTU/hr. input
requirement is operating. The connection to
the machine becomes even more important in
this type of location.
Flexible gas connectors with quick disconnect
or swivel fittings (when used) and gas
connectors beyond the length necessary will
reduce the BTU/hr. flow capacity to the
machine.
NOTE: Do not use corrugated stainless steel
tubing for commercial gas equipment
supply connections.
NOTE: A straight gas connection is the ideal
condition for the rated BTU/hr. flow
capacity of the connector. If a straight
connection is not possible and a
Figure 3
— 8 —
Gas Connection Data
C24GA SERIES GAS CONVECTION STEAMERS
FLEXIBLE GAS CONNECTORS BTU/hr. FLOW CAPACITY
LENGTH
3
LENGTH
1, 2
3
End Fittings - (1) Quick Disconnect End Fittings - Both Threaded
& (1) Threaded
ID 36" 48" 60" 72" 36" 48" 60" 72"
1
/2" 77,000 68,000 60,000 55,000 120,000 106,000 93,000 86,000
3
/4" 218,000 180,000 158,000 139,000 256,000 225,000 198,000 175,000
1" 379,000 334,000 294,000 279,000 512,000 451,000 397,000 350,000
11/4" 615,000 541,000 476,000 419,000 946,000 833,000 733,000 645,000
1. Flow rating BTU/hr. 0.64 SP. GR @ 0.5 inch W.C. pressure drop.
2. BTU/hr. flow capacities are based on Dormont Mfg. Co. Supr-Safe gas line connectors and
are provided for reference. Additional quick disconnect fittings, swivels, or manual shut off
valves will reduce the BTU/hr. flow capacities listed in this table. If other flexible gas
connectors are used, check the manufacturer’s specifications for BTU/hr. flow capacities.
Supr-Safe is a registered trademark of the Dormont Manufacturing Company.
3. The maximum length for a flexible gas connector is 72" per National Fuel Code standards.
BLACK IRON PIPE BTU/hr. FLOW CAPACITY
1, 2, 3
Natural Gas Nominal Inside Diameter of Pipe
Pipe Length
1
/2"
3
/4"1"1
1
/4"1
1
/2"2"
15' 76,000 172,000 345,000 750,000 1,220,000 2,480,000
30' 52,000 120,000 241,000 535,000 850,000 1,780,000
45' 43,000 99,000 199,000 435,000 700,000 1,475,000
60' 38,000 86,000 173,000 380,000 610,000 1,290,000
75' 77,000 155,000 345,000 545,000 1,120,000
90' 70,000 141,000 310,000 490,000 1,000,000
1. Flow rating BTU/hr. 0.64 SP. GR @ 0.3 inch W.C. pressure drop.
2. BTU/hr. flow capacities are based on Schedule 40 pipe, include a tolerance for pressure
losses in gas piping systems are provided for reference.
3. Count each 90° elbow as 3' of gas pipe for the purpose of calculating total pipe length.
— 9 —
C24GA SERIES GAS CONVECTION STEAMERS
The generator is equipped with a factorypreset pressure regulator. Natural gas
pressure regulators are preset for 2.5" W.C.
(0.62 kPa). Propane gas pressure regulators
are preset for 10" W.C. (2.46 kPa). No further
adjustment should be required. Check gas
pressures with a manometer at time of
installation to verify that they agree with the
pressures specified.
WARNING: PRIOR TO LIGHTING, CHECK
ALL JOINTS IN THE GAS
SUPPLY LINE FOR LEAKS.
USE SOAP AND WATER
SOLUTION. DO NOT USE AN
OPEN FLAME.
After piping has been checked for leaks, all
piping receiving gas should be fully purged to
remove air.
Testing the Gas Supply System
FLUE GAS EXHAUST
DO NOT obstruct the flow of flue gases from
the flue located on the rear of the steamer.
It is recommended that the flue gases be
vented to the outside of the building through
a ventilation system installed by qualified
personnel.
Information on the construction and installation
of ventilating hoods may be obtained from
Vapor Removal from Cooking Equipment,
NFPA-96 (latest edition) available from the
National Fire Protection Association,
Batterymarch Park, Quincy, MA 02269.
When the gas supply pressure exceeds
1
/2 psig (3.45 kPa), the steamer and its
individual manual gas shutoff valve must be
disconnected from the gas supply piping
system.
1
When the gas supply pressure is
/2 psig (3.45
kPa) or less, the steamer should be isolated
from the gas supply system by closing its
individual manual gas shutoff valve.
— 10 —
C24GA SERIES GAS CONVECTION STEAMERS
ELECTRICAL CONNECTION
WARNING: THE STEAMER IS EQUIPPED
WITH A THREE-PRONG
GROUNDING PLUG. THE
OUTLET TO WHICH THIS
PLUG IS CONNECTED MUST
BE PROPERLY GROUNDED.
IF THE RECEPTACLE IS NOT
THE PROPER GROUNDING
TYPE, CONTACT AN ELECTRICIAN. DO NOT REMOVE THE
GROUNDING PRONG FROM
THE PLUG.
WARNING: ELECTRICAL AND GROUNDING
CONNECTIONS MUST COMPLY
WITH THE APPLICABLE
PORTIONS OF THE NATIONAL
ELECTRICAL CODE AND/OR
OTHER LOCAL ELECTRICAL
CODES.
START UP
WARNING: THE STEAMER AND ITS
PARTS ARE HOT. USE CARE
WHEN OPERATING, CLEANING OR SERVICING THE
STEAMER. THE COOKING
COMPARTMENT CONTAINS
LIVE STEAM. STAY CLEAR
WHILE OPENING THE DOOR.
Once the steamer is installed and all mechanical
connections have been made, thoroughly test
the steamer before operation.
1. Check that proper water, drain, electrical
and gas connections have been made.
2. Turn on manual gas valve.
3. Press power switch to the on position. After
approximately 20 minutes the ready light
should come on, indicating that generator
has reached operating pressure.
Refer to the data plate located on the left edge
of the tabletop and the electrical diagram
located behind the front panel on the base.
ELECTRICAL DATA
Volts 120
Hertz (Hz) 60
Phase 1
Machine Amps 3
Minimum Circuit 15
Ampacity, Maximum
Protective Device
AMPS
4. With the door closed the ready light comes
on. Set the timer to the 5-minute position.
Open the door and observe that no steam is
entering the compartment and the ready
and cooking lights are off.
5. Close the compartment door. The cooking
light should now be lit and steam should be
heard entering the compartment.
6. Check the drain line to be sure that water
from the cold water condenser is flowing
through the drain line.
7. Open the compartment door and observe that
steam supply to the compartment stops, and
that the ready light and cooking light turn off.
8. Close the compartment door and let the
cooking cycle finish. When the timer returns
to the 0 position, a buzzer will sound,
signaling the end of the cooking cycle and
the cooking light goes off. To silence the
buzzer, turn the dial timer to the OFF position.
9. Complete the above steps for each cooking
compartment.
— 11 —
10. To shutdown the steamer, press the power
switch to the off position and close the
manual gas shutoff valve. Leave the
compartment doors slightly open to allow
the inside to dry out.
C24GA SERIES GAS CONVECTION STEAMERS
OPERATION
WARNING:
WARNING:
THE STEAMER AND ITS PARTS
ARE HOT. USE CARE WHEN
OPERATING, CLEANING OR
SERVICING THE STEAMER.
THE COOKING COMPARTMENTS
CONTAIN LIVE STEAM. STAY
CLEAR WHILE OPENING EACH
DOOR.
LIGHTING AND SHUTDOWN
INSTRUCTIONS
Lighting
1. Turn manual gas shutoff valve to on
position.
2. Press power switch on. Steam will
generate in 20 minutes.
3. Ready light will light when compartment is
ready for cooking.
WARNING:THE STEAMER AND ITS
PARTS ARE HOT. USE
CARE WHEN OPERATING,
CLEANING OR SERVICING
THE STEAMER.
Compartment Controls and Indicators
ITEM
Ready Light
(Green)
Cooking Light
(Red)
Timer
Indicates the steamer is ready
for the cooking cycle
Indicates the steamer is in the
cooking phase
Set the desired cooking time.
Timer range is 0-60 minutes or
constant. Turn to the OFF
position to silence buzzer.
FUNCTION
4. Load food and set timer to proper cook
time. Door must be closed.
Shutdown
1. Press power switch off.
2. Wait 5 minutes before relighting the
appliance (if required).
3. Turn manual gas shutoff valve to off
position.
4. Do not unplug or turn off power supply for
at least 20 minutes after power switch is
turned off.
5. Leave compartment door sightly open.
COMPARTMENT CONTROLS
The upper section of the steamer consists of
two cooking compartments. Each compartment
functions independently with its own controls
(See Figure 4) and is a separate, sealed steam
chamber during the cooking operation.
Figure 4. Cabinet Controls
— 12 —
C24GA SERIES GAS CONVECTION STEAMERS
Refer to Steam Cooking with Vulcan Kettles
and Steamers for suggested cooking times.
Also refer to the Suggested Cooking Guideline
in this manual. Size, weight, pan loading and
product quality will affect cooking times and
should be adjusted to your own requirements.
STARTUP PROCEDURE
1. Open manual gas shutoff valve and ensure
the steamer doors are closed.
2. Press power switch to the on position.
3. If Ready light fails to turn on in 20 minutes,
press power switch off and back on to
reset ignition system.
PREHEATING
Preheat the cooking cavity when the steamer
is first used for the day or whenever the
compartment is cold. Keep the door closed
during the preheat cycle.
• When the green ready light comes on,
set the timer to 10 minutes to preheat
the compartment.
• The red cooking light is lit.
• When the buzzer sounds, turn the timer
to the OFF position. The steamer is
ready to cook.
3. The buzzer will sound when the cooking
cycle ends and steam has stopped entering
the cooking compartment(s).
• Turn the timer(s) to the OFF position
to silence the buzzer(s); remove the
cooked food.
• The red cooking light will go off and
the green ready light will come on to
indicate the steamer is ready for the
next cooking cycle.
STEAMING
Each steaming compartment has its own
controls.
With the Ready light lit, the steamer is ready
for use.
• Place pans of food to be cooked into the
compartment and shut the door.
• Set the timer to the desired cooking
time. Steaming begins.
• The cooking cycle may be interrupted at
any time by opening the compartment
door. Resume cooking by closing the door.
• When the buzzer sounds, the timed
steaming cycle has finished. Steaming
stops, the cooking light goes off. To
silence the buzzer, turn the timer OFF.
OPERATING
1. With the compartment(s) preheated and
the green ready light on, place pans of
food into the cooking compartment(s) and
shut the door(s).
2. Turn the timer(s) to the desired cooking
time.
• The cooking cycle will begin.
• The cooking cycle and time may be
interrupted at any time by opening
the door. Close the door to resume
cooking.
EXTENDED SHUTDOWN
To shut down for an extended period:
1. Press power switch off.
2. Turn manual gas shutoff valve to off.
3. Clean the compartment(s).
4. After 20 minutes unplug steamer.
— 13 —
C24GA SERIES GAS CONVECTION STEAMERS
CLEANING
WARNING:
Cooking Compartment Drains
Keep compartment drains running freely.
Inspect compartment drains daily for
blockage. Remove any particles or debris
from the perforated strainer daily (or more
often if needed).
After cooking greasy foods or seafood, close
the doors and operate each compartment for
25 to 30 minutes to flush any residual grease
and oils down the compartment drain. Make a
solution of warm water and non-chloride
detergent and pour
down each compartment drain. Rinse by
pouring
each compartment drain.
Draining Generator
DISCONNECT ELECTRICAL
POWER TO THE MACHINE AND
FOLLOW LOCKOUT / TAGOUT
PROCEDURES BEFORE
CLEANING.
1
/2 gallon (1.9 liters) of it
1
/2 gallon (1.9 liters) of hot water down
Compartments
Wash the inside of the compartment with a
solution of warm water and non-chloride
detergent. Rinse with warm water.
Once a week, thoroughly clean the exposed
surfaces (sides, front, door and top) with a
damp cloth and polish with a clean cloth. To
remove discolorations, use a nonabrasive
cleaner.
Door Gaskets
Clean the gasket sealing surface of the
compartment doors to remove food acids for
maximum gasket life. Do not use any solvents
or sharp instruments. Wash with a cloth
moistened in a solution of mild detergent and
warm water. Rinse with a fresh cloth
moistened with warm water to remove all
traces of detergent.
Wipe dry with a clean cloth. Never apply food
oils or petroleum lubricants directly to the
door gasket. Petroleum-based solvents and
lubricants will reduce gasket life.
To prevent malfunction of controls and
clogging, it is essential to drain the generator
every day. This will flush out any accumulated
minerals from the feed water. It will also aid in
preventing internal scale buildup which would
interfere with proper generator operation.
Failure to drain the generator every day will
void the steamer warranty. The presence of
minerals in suspension is indicated by a murky
or milky condition in the first portion of the
water drained.
WARNING: THE WATER BEING DRAINED
IS HOT AND UNDER PRESSURE. USE CARE WHEN
CLEANING OR SERVICING THE
GENERATOR.
After the generator has been in operation, turn
the unit off with the power switch located on
bottom cooking cavity to drain the generator.
The generator will drain for approximately 15
minutes, removing sediment, scale and lime
buildup in the generator.
— 14 —
LEAVE COMPARTMENT DOORS OPEN
Leave the compartment doors slightly open
when the steamer is not in use. When the
compartment is idle, never latch the door and
apply pressure to the door gasket. Leaving the
gasket under pressure can cause permanent
deformation and reduce gasket life.
GUIDELINES FOR MAINTAINING
STAINLESS STEEL SURFACES
There are four things that will break down
stainless steel and allow corrosion to develop:
1) abrasion, 2) deposits, 3) water and 4)
chlorides.
Avoid rubbing with steel pads, wire brushes or
scrapers that can leave iron deposits on
stainless steel. Instead, use plastic scouring
pads or soft cloths. For stubborn stains, use
products such as Cameo, Talc or Zud First
Impression. Always rub parallel to the polish
lines or with the grain.
C24GA SERIES GAS CONVECTION STEAMERS
Hard water will leave deposits that promote
rust on stainless steel. Treated water from
softeners or certain filters can eliminate these
mineral deposits. Other deposits from food or
lubrication must be properly removed by
cleaning. Use mild detergent and non-chloride
cleaners. Rinse thoroughly. Wipe dry. Where
appropriate, apply a polish recommended for
stainless steel (such as Benefit or Super
Sheen) for extra protection and luster.
— 15 —
C24GA SERIES GAS CONVECTION STEAMERS
MAINTENANCE
WARNING:
Water Treatment System
A water treatment system is recommended for
steamers. Refer to your supplier’s manual for
normal maintenance procedures for proper
scale-free operation recommendations.
Scale Related Maintenance
Periodic maintenance is necessary to keep
your generator clean and efficient. Initially, after
three months of steamer usage, it is
recommended that you have your Vulcan-Hart
authorized servicer inspect the generator. Local
water conditions and steamer usage will
determine the frequency that this service must
be repeated; however, a minimum
recommendation is once a year. This
maintenance is not covered by warranty.
THE STEAMER AND ITS PARTS
ARE HOT. USE CARE WHEN
OPERATING, OR SERVICING
THE STEAMER.
Draining Generator
At least once daily, turn the unit off with the
power switch located on bottom cooking cavity,
to drain the generator.
NOTE: DO NOT remove the electric supply
or the unit will not drain.
Door Gaskets
If the door gasket is leaking due to a nick or cut,
it must be replaced. Damage to the gasket
sealing surface will cause steam leakage.
Flue
Annually (at minimum), when the steamer is
cool, check the flue and clear any obstructions.
— 16 —
C24GA SERIES GAS CONVECTION STEAMERS
COOKING CHART
The following table lists suggested cooking times and weights. These times, which will vary
depending on initial product temperature, size, shape, etc., are approximate and should be
adjusted to suit your operation.
PRODUCTS TO BE COOKED IN SOLID PANS
PRODUCT
Eggs, Scrambled
Rice, Long Grain (Cover with 4 cups water/lb.)
Pasta (Place perforated pan inside solid pan, cover
pasta with cold water
Spaghetti – Regular/Vermicelli
Macaroni - Shells/Elbows
1
Noodles -
/2" Wide
Lasagna Noodles
Frozen Casseroles, Lasagna
Meat Loaf, 3-5 Lb. Each
Beef
Ground Chuck
Sliced as Purchased
Shrimp, Frozen, 10 Shrimp per Lb.
Beans
Baked
Refried
Canned Vegetables
Prunes, Dried
TIMER SETTING
IN MINUTES
12
25
12-15
15-18
12-15
15-18
35
40
20-25
35-40
5
9
9
6
15
WEIGHT
PER PAN
8 Dozen
2 lbs.
4 lbs.
4 lbs.
4 lbs.
4 lbs.
Full Pan
15 lbs.
10 lbs.
10 lbs.
4 lbs.
10 lb. Can
10 lb. Can
10 lb. Can
— 17 —
C24GA SERIES GAS CONVECTION STEAMERS
PRODUCTS TO BE COOKED IN PERFORATED PANS
PRODUCT
Clams
Frozen
Fresh
King Crab Frozen
Claws
Legs
Lobster Tail Frozen
Lobster, Live, 10" – 12"
Salmon Fillets, Frozen, 8 Oz. Ea
Scallops, Fresh
Scrod Fillets, Fresh
Eggs
Hard Cooked
Soft Cooked
Soft Yoke for Caesar Salad
Chicken Breasts, Legs, Thighs
Turkey
Frozen Breasts (2)
Cut Lengthwise
Corned Beef
Hot Dogs or Wieners
Asparagus Spears
Frozen
Fresh
Beans
Green, 2" Cut, Frozen/Fresh
Lima, Frozen
Baby Lima, Frozen
Broccoli
Spears, Frozen
Spears, Fresh
Flowerettes, Frozen
Brussel Sprouts, Frozen
Cabbage, Fresh, 1/6 Cut
TIMER SETTING
IN MINUTES
10-12
10-12
4
4-6
6
5
5
4
3.5
15
9-10
6-8
20
90
95
40-75
3
10-12
5
6
8
5
8
6
6
6
8
WEIGHT
PER PAN
3 Dozen
3 Dozen
2-1/2 Lbs.
1
/2 Lbs.
2-
10 lbs.
4 per pan
7-1/2 lbs.
3 lbs.
4 lbs.
4 Dozen
4 Dozen
4 Dozen
15 lbs.
6-7 lbs. ea.
20-25 lbs. ea.
6-8 lbs.
80-100 Count
3 Dozen
5 lbs.
5 lbs.
5 lbs.
5 lbs.
4 lbs.
5 lbs.
5 lbs.
5 lbs.
5 lbs.
— 18 —
C24GA SERIES GAS CONVECTION STEAMERS
PRODUCTS TO BE COOKED IN PERFORATED PANS
PRODUCT
Carrots
Baby Whole, Frozen
Crinkle Cut, Frozen
Sliced, Fresh
Cauliflower, Flowerettes
Frozen
Fresh
Celery, 1" Diagonal Cut
Corn
Yellow Whole Kernel, Frozen
Cobbettes, Frozen
Corn On Cob, Fresh
Peas, Green
Potatoes, “Whole Russet”
Spinach
Chopped, Frozen
Defrosted
Fresh Cut
Squash, Acorn, Halves
Zucchini, Slices
Frozen Mixed Vegetables
Fruit, Blanch for Peeling
Grapefruit
Oranges
Pineapple, Whole for Cutting
TIMER SETTING
IN MINUTES
8
7-8
11
6
7-8
7
5
8
16-18
10-12
16-18
6
55
17
5
3
25
8
6-7
3
3
4
WEIGHT
PER PAN
7 lbs.
4 lbs.
9 lbs.
4 lbs.
5 lbs.
5 lbs.
5 lbs.
27 Ears
80 Ears
18 Ears
54 Ears
5 lbs.
10 lbs.
6 lbs.
6 lbs.
2 lbs.
10 Halves
10 lbs.
5 lbs.
COOKING HINTS
Where possible, spread food out evenly in pans. Do not allow food to protrude above pans, since
this will interfere with steam circulation between pans in the compartment.
Always preheat compartments for satisfactory results.
When time does not allow for defrosting of frozen vegetables, such as loose-pack peas, corn, diced
carrots, etc., they may be cooked at once provided just half of the suggested portions in the cooking
chart are used.
— 19 —
C24GA SERIES GAS CONVECTION STEAMERS
TROUBLESHOOTING
SYMPTOMS
Unit not steaming
Door leaks
Water accumulates in
compartment
Water not being
supplied to generator
POSSIBLE CAUSES
Gas supply is off
Power cord is unplugged
Power switch is off
Water supply is off
Burner control goes into 100%
lockout
Damaged door gasket
Plugged drain or screen
Drain clogged
Not leveled properly
Water supply valve is off
Water pressure low
REMEDY
Turn on gas supply.
Plug in power cord.
Press power switch on.
Turn on water supply.
Shut off the power, wait 5
minutes, then turn power back on
to restart ignition.
If symptom persists, contact your
Authorized Vulcan-Hart Servicer.
Check door gasket for damage. If
adjustment is needed, contact
your Authorized Vulcan-Hart
Servicer.
Clear compartment cavity screen.
If symptom persists, contact your
Authorized Vulcan-Hart Servicer.
Unclog drain.
Level per instructions in this
manual.
Turn valve on.
Check water supply pressure.
Water filter is plugged
Refer to water filter manual. If
symptom persists, contact your
Authorized Vulcan-Hart Servicer.
Steam is exiting from
under unit
Generator pressure is too high
Contact your Authorized VulcanHart Servicer.
SERVICE AND PARTS INFORMATION
To obtain service and parts information concerning this model, contact the Vulcan-Hart Service
Agency in your area (refer to our website, www.vulcanhart.com for a complete listing of Authorized
Service and Parts depots).
When calling for service, the following information must be available: model number, serial number,
manufacture date (MD) and voltage.
F-35423 Rev A. (08-06)
— 20 —
PRINTED IN U.S.A.
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