Vulcan-Hart ML-136056, ML-136057 User Manual

C24GA SERIES
GAS CONVECTION
STEAMERS

MODELS
C24GA6 ML-136021

C24GA10 ML-136022

INSTALLATION &

OPERA TION MANUAL

Models manufactured after June 2006
C24GA6 ML-136056

C24GA10 ML-136057

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 B. (10-07)

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 LOCA TION THE INSTRUCTIONS TO BE FOLLOWED
IN THE EVENT THE SMELL OF GAS IS DETECTED. THIS INFORMA TION 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.

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.

IN THE EVENT OF A POWER FAILURE, DO NOT
ATTEMPT TO OPERATE THIS DEVICE.

© VULCAN-HART, 2007

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INTRODUCTION

C24GA SERIES GAS CONVECTION STEAMERS

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 125,0 00 125,000

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

The Vulcan steamer must be installed in
accordance with:

In the United States of America:

1. State and local codes.

2. National Fuel Gas Code, ANSI-Z223.1/
NFPA #54 (latest edition). Copies may be
obtained from The American Gas
Association Accredited Standards
Committee Z223, @ 400 N. Capital St. NW,
Washington, DC 20001, or the Secretary
Standards Council, NFPA, 1 Batterymarch
Park Quincy, MA 02169-7471.

3. NFPA Standard # 96 Vapor Removal from
Cooking Equipment, latest edition,
available from the National Fire Protection
Association, Batterymarch Park, Quincy,
MA 02269.

4. In the Commonwealth of Massachusetts all
gas appliances vented through a ventilation
hood or exhaust system equipped with a
damper or with a power means of exhaust
shall comply with 248 CMR.

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C24GA SERIES GAS CONVECTION STEAMERS

In Canada:

1. Local codes.

2. CAN/CSA-B149.1 Natural Gas Installation
(latest edition).

3.

CAN/CSA-B149.2 Propane Installation Code
(latest edition), available from the Canadian
Gas Association, 178 Rexdale Blvd.,
Etobicoke, Ontario, Canada M9W 1R3.

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.

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 1½
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

Make sure there is an adequate supply of air
in the room to replace air taken out by the
ventilating system. If you have any questions,
contact the ventilation system installer.

The rear feet have holes in the flanges for
anchor bolts.

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C24GA SERIES GAS CONVECTION STEAMERS

PLUMBING CONNECTIONS

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

may have ¾" 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.

— 5 —

• 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

The 1½" 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.
Do not reduce the 1 ½" 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
away from the steamer ¼" 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 ¾" NPT minimum inside
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.

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.

Gas Input: ¾" 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.

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