Market Forge MFT6CE Service Manual

SERVICE & PARTS MANUAL

Steam

-

Jacketed, Electric

Models:

ULTRA KETTLES®

Self-contained Counter-Top,

MFT6CE

MFT10CE

Form No. S-2287 8/83 Printed in U.S.A.

Market Forge Co.

35 Garvey St., Everett, MA. 02149

Tel. [phone], Telex 94-9414, Cable MAFORCO

TABLE OF CONTENTS

Paragraph Page

Paragraph Page

SECTION 1 INTRODUCTION

1.1 Description ..............……………….... 1-1

1.2 Basic Functioning ...........………….... 1-1

1.3 Service .....................………………... 1-1

SECTION 2 OPERATION

2.1 Operating Controls and Indicators. .. 2-1

2.2 Operating Procedures ........………... 2-1

2.3 Reservoir Fill Procedure ...………..... 2-1

2.4 Automatic Venting............…….…….. 2-1

2.5 Kettle Washing ................. …………..2-3

LIST OF ILLUSTRATIONS

Figure Page
SECTION 2 OPERATION

2-1 Controls and Indicators. ....…………….... 2-2

2-2 Temp. and Pressure Control Settings . . . 2-3
SECTION 3 MAINTENANCE

3-1 Wiring Label #A09-5932. .....……………. 3-3

3-2 Wiring Label #A09-5933. ...……………... 3-4

3-3 Wiring Label #A09-5934. ...……………... 3-5

3-4 Schematic Diagram ...........……………... 3-6

3-5 Access Panel To Heating Element …….. 3-10

SECTION 3 MAINTENANCE

3.1 General .....................……………………...3-1

3.2 Trouble-Shooting Guide ...…………….... 3-1

3.2.1 Electrical Fault Isolation ..……………...... 3-2

3.2.2 Water Level Control. .........………… ….. 3-6

3.2.2.1 Circuit Operation .........……………..... 3-6

3.2.2.2 Control Fault Isolation. ...…………..... 3-6

3.3 Repair and Replacement. ....………... 3-6

3.3.1 Console Control Components. ..……….. 3-6

3.3.2 Temperature and Low Water Probes. …. 3-7

3.3.3 Heating Element ...........………………... 3-7

SECTION 4 ILLUSTRATED PARTS LIST

4.1 General ....................……………………….. 4-1

4.2 Ordering Information....…………………...... 4-1

Figure Page
SECTION 4 ILLUSTRATED PARTS LIST

4-1 Kettle Exterior Controls and Indicators….. 4-2

4-2 Kettle Bottom View..........………………….. 4-4

4-3 Control Bracket Assembly. .……………...... 4-6

4-4 Control Box - Top View. ....……………….... 4-8

4-5 Control Box -

Rear View and Bottom View …………... 4-10

LIST OF TABLES

Table Page
SECTION 2 OPERATION

2-1 Controls and Indicators. ......……….... 2-2

2-2 Temperature Control Setting Guide ... 2-4

Table Page

SECTION 3 MAINTENANCE
3-1 General Trouble-Shooting Guide . . . 3-1

3-2 Electrical Ratings .............…………... 3-7

ii S-2287

SECTION I INTRODUCTION

THIS SERVICE AND PARTS MANUAL CONTAINS DESCRIPTIVE INFORMATION, OPERATING INSTRUCTIONS, AND

MAINTENANCE AND TROUBLE -SHOOTING INFORMATION FOR MODELS MFT6CE AND MFT10CE STEAM-JACKETED
ULTRA KETTLES® PARTS LISTS ARE ALSO INCLUDED IN WHICH EACH REPLACEABLE PART IS IDENTIFIED AND
SHOWN IN AN ACCOMPANYING ILLUSTRATION.

1.1 DESCRIPTION

Market Forge Models MFT6CE (6 gallon capacity)
and MFT1 OCE (10 gallon capacity) are self­contained, counter-top, tilting Ultra Kettles® Each
model has a jacket of double-wall construction
forming a sealed reservoir around the lower two-thirds
of the kettle. The reservoir is charged with water and
anti-freeze solution. Kettles are equipped with a
removable electric heating element and controls,
including a low water cutoff device for protection of
the heating element. Both models are of identical
construction, except for kettle size and element
heating capacity.

1.2 BASIC FUNCTIONING

Self-contained kettles operate by generating steam
in the kettle reservoir. The sequence of operation is
as follows:

1. Operator presses the power switch to the ON

position and sets the temperature control dial at
the desired setting from 1 to 10 (100°F to 300°F,
38°C to 149°C, jacket temperature).

2. Control circuit is normally completed to the temp-

erature controller if the following conditions exist:

a. Water level in kettle reservoir is adequate to

prevent circuit interruption by the low water cutoff
device. An activated cutoff is indicated by the
buzzer sounding, amber low water light turning on,
and the heating element shutting off.
b. Kettle is in vertical position with circuit com­pleted through the tilt interlock switch (Micro
switch).

3. Thermostatic control contacts close to energize
contactor coils.

4. Power is supplied to the elements through closed
power contactors.

5. As the temperature of water rises in the kettle
reservoir, increase in steam pressure is indicated
on the pressure gauge. Models after 1982 have the
automatic venting feature (Vent -Rite Air Valve).

6. When the temperature of steam in the reservoir
reaches the setting shown on the temperature
control dial, the temperature controller opens to
break the contacts and shut off the heating
element. On/off cycles will occur as required to
maintain temperature control.

1.3 SERVICE

Required service, both preventive and corrective, is
explained in Section 3. Should repairs be required, a
network of authorized agencies is available to assist
with prompt service. A current Directory of Authorized
Service Agencies may be obtained by contacting:

Product Service Department
MARKET FORGE CO.
35 Garvey Street
Everett, Massachusetts 02149
Telephone: [phone]

The model and serial numbers must be referenced
when corresponding with Market Forge. These
numbers can be found on the data plate located on
the back of the control box.

1-1 S-2287

SECTION 2 OPERATION

TABLE

2-1

TEMPERATURE CONTROL SETTING

2.1 OPERATING PROCEDURES

Instructions for operating the self -contained kettles are as

follows:

1. Check that the external electrical shut -off to the kettle
(such as a main circuit breaker) is on.

2. Push power switch to ON position; switch will glow red in
ON position.

3. To preheat kettle, set temperature control dial at 10, and
wait until pressure gauge reads 50 psi. (Do not preheat
when cooking milk and products which cook onto hot
cooking surfaces. These foods should be put into the
kettle before heating.) Figure 2-1 shows the correct
settings for the temperature control dial and the pressure
gauge.

4. Put food to be cooked into kettle.

5. Set temperature control dial at the required setting from 1
to 10 coinciding with a temperature range from roughly
100°F to 300°F, 38°Cto 149°C, in the jacket. Table 2-1
Temperature Control Setting Guide, shows the
relationship between the temp erature control setting and
the water temperature.

6. When finished cooking, set temperature control knob to
OFF, and push the power switch to OFF.

7. Pour finished product from kettle using tilt handle, being
careful to avoid splashing.

8. Wash kettle thoroughly. See subsection 2.5 for
instructions.

2.2 OPERATING CONTROLS AND INDICATORS
The controls and indicators used to operate the MFT6CE

and MFT10CE tilting Ultra Kettles® are discussed in this
section. Figure 2-2 shows the physical location of the controls
and indicators. Table 2 -2 lists each control and indicator and
its function.

2.3 RESERVOIR FILL PROCEDURE
The reservoir water level must be maintained at or above

the minimum needed to submerge the heating element. If the
amber low water light turns on and the buzzer sounds during
use, the water level is not adequate and the low water
protection control has automatically shut off the heating
element. Low water light will stay lit and buzzer will sound until
the jacket reservoir has again been filled to a safe water level.

WARNING: Before connecting water to this unit,
water supply should be analyzed to make sure
hardness is no greater than 2.0 grains per gallon
and pH level is within the range of 7.0 - 7.5 Water
which fails to meet these standards should be
treated by installation of a water conditioner.
EQUIPMENT FAILURE CAUSED BY IN­ADEQUATE WATER QUALITY IS NOT COVERED
UNDER WARRANTY.

Fill Procedure

The following procedure must be completed before further use.
CAUTION: THERE SHOULD BE NO PRESSURE IN THE
KETTLE DURING THE FILL PROCEDURE.

TO FILL:

1. Push in low water switch.

2. Turn elbow on safety valve upright.

3. Pull lever on safety valve up and add water through elbow

until low water light goes out and buzzer stops. CAUTION:
Be sure to turn elbow to down position to avoid injury from
escaping steam.

4. Push low water switch to reset.

NOTE
If the kettle is to be subjected to temperatures below 32°F,
0°C, it is essential that either the proper proportion of 1 part
(104 oz.) anti-freeze to 3 parts (31 2 oz.) water be
maintained in the kettle jacket, or that the jacket be
emptied.

Temp. °F
Temp. °C

1 2 3 4 5 6 7 8 9 10

GUIDE

Control Number

90 125 160 195 231 273 300
32 52 71 91 110 134 149

2-1 S-2287

2.4 AUTOMATIC VENTING
If there is any air in the kettle jacket after filling, it will be

relieved by the Automatic Venting system.

Figure 2-2. Controls and Indicators.

TABLE 2-2

CONTROLS AND INDICATORS

2-3

Figure 2.2

Ref. No. Description Function

1 Tilt Handle Used to move kettle to upright or downward position for ease in

pouring and washing.

2 Safety Relief Valve Safety relief va lve opens automatically to release excessive steam

pressure in kettle reservoir. (Located on rear of kettle.)

3 Temperature Control

Knob

Allows operator selection of kettle temperature in increments from 1
to 10, 100°F to 300°F, 38°C to 149°C steam jacket temperature and
OFF.

4 Low Water Switch Glowing amber light indicates that the low water protective device

has cut off power supply to controls and heating element.

5 Power ON/OFF Switch Controls power to kettle.
6 Pressure Gauge Indicates pressure in pounds per square inch (PSI) inside kettle.

7 Water Level Sight

Sight glass shows water level in kettle reservoir.

Window

8 Heating Element Heats water to desired temperature.

9 & 11 Fittings , Electrode

(Water Probes)

Low water probe in conjunction with the low water cutoff protects the
kettle from a low water condition.

10 Temperature Sensor Measures water temperature.
Not Shown Vacuum Breaker Breaks hazardous vacuum. (Located on rear of kettle.)
Not Shown Vent-Rite Air Valve Automatically vents air from kettle. (Located on rear of kettle.)

2.5 KETTLE WASHING
The kettle interior and exterior should be thoroughly

washed after each use. The kettle can be moved from
an upright to a downward position by pulling the tilt
knob forward and pushing the tilt handle downward. To
move the kettle to the upright position, simply reverse
the procedure. To wash the kettle follow the directions
below:

1. Fill kettle with water immediately after each use to
facilitate cleaning even if kettle is not going to be
washed at that time.

2. Prepare a warm water and mild detergent solution
in the kettle.

3. Remove food soil using a nylon brush. CAUTION:
Do not scrape inside of the kettle with metal tools
steel scouring pads, or abrasive cleaners.
Scratches will result which ruin the general
appearance of the kettle, make it harder to clean
and maintain in sanitary condition.

4. To loosen food which is stuck to the kettle, allow

it to soak at a low temperature setting.

5. Rinse with clear water and dry interior of ket tle.

6. Wipe down exterior of kettle, rinse, and dry.

CAUTION: Never get water into the electrical

controls.

S-2287