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This service and parts manual contains general information, installation operation, principles of op-
eration, troubleshooting, and maintenance information for the Market Forge ST-6 Pressureless
Steam Cookers. Also included is a parts list in which each replaceable part is identified and shown
in an accompanying exploded view.
1.1 DESCRIPTION
The ST-6-TGG and ST-12-TGG is a pressureless
steam cooker consisting of two independently controlled
compartments enclosed in a single cabinet. Each cook-
ing compartment is provided with steam by individual
gas generator rated at 50,000 Btu/hr. Each compartment
is equipped with a separate three-piece door with inner
gasket plate isolated from the exterior surface. Door
latches operate by action for positive sealing of inner
door. Steam and steam-condensing circuits are electri-
cally controlled. Operating controls are displayed on a
single front-mounted panel and include separate power
switches and timers with indicator lights for selection of
constant steam or 60-minute-long duration cooking.
A separate steam source is not required for operation
of the pressureless cooker. The model ST-6 TGG is pow-
ered by twin gas steam generators totalling 100,000 Btu/
hr. rate. The cooker is equipped for connection to all
necessary utilities, gas, electricity, hot and cold water,
and an open drain.
1.2 BASIC FUNCTIONING
The Model TGG may be operated with only one
compartment in use; or both may be used simulta-
neously. Each compartment is equipped with identical
controls, allowing selection of constant steam or
60-minute timer operation. The cooker becomes opera-
tional when the power switch is depressed to "
the timer is set to constant steam, or the timer is set at
the desired cooking time and the compartment door is
closed. The indicator light comes on, allowing steam to
flow into the compartment.
M
F
I
, I
ARKET
ORGE
NDUSTRIES
NC
35 G
S
E
, MA 02149
ARVEY
TREET
VERETT
T
: 617-387-4100 T
: 91-9494
EL
ELEX
F
: 617-387-4456 O
AX
UTSIDE
Form No. S-4846 Rev. A 11/98
1. INTRODUCTION
" and
ON
.
MA: 800-227-2659
When steam flowing inside the compartment has
raised the interior temperature to 195°F, the contacts of
a thermostatic switch automatically close, completing
the circuit to the timer motor and starting the cooking
time period. At the end of the set interval, timer contacts
switch to shut off the cooking operation and sound a
signal buzzer. The buzzer is silenced by returning the
timer dial to the
position. In the constant steam mode,
OFF
operation will be continuous.
Steam emitted from the compartment along with liq-
uid cooking drainage are directed through a drain screen
inside the compartment into a cooker drain line. Both
drain lines are connected to a common condenser box
located in rear. A cold water solenoid valve connected to
the condenser box is automatically actuated by a ther-
mostatic switch to condense the steam to water prior to
discharging into an external drain.
1.3 SERVICE
Required service, both preventive and corrective, is
explained in Section 6. Should repairs be required, a net-
work of authorized agencies is available to assist with
prompt service. A current Directory of Authorized Ser-
vice Agencies may be obtained by contacting:
Product Service Department
Market Forge
35 Garvey Street
Everett, Massachusetts 02149
Telephone (617) 387-4100
The model and serial numbers must be referenced
when corresponding with Market Forge. The data plate
containing the serial number pertaining to the equipment
is located toward the front on the top panel of the cooker.
1-1
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