Market Forge 3005CTE Service Manual

SERVICE & PARTS MANUAL

Ultra Steam® Convection Steamer

Models:
3005 CTE
3010 CTE
3015 CTE

Revision No. 1-284

Form Number S-2267A 2/84 Printed in USA

Market Forge Co.

35 Garvey Street Everett, MA02149 Tel. [phone],

Telex 94-9414, Cable MAFORCO

TABLE OF CONTENTS

Section

SECTION 1 INTRODUCTION

1.1 Description

1.2 Service

SECTION 2 TROUBLE-SHOOTING

2.1 General

2.2 Electrical Fault Isolation

Page

1-1
1-1

2-1
2-1

LIST OF ILLUSTRATIONS

Figure Page

SECTION 2 TROUBLE-SHOOTING

2.1 Schematic & Wiring Diagram, 60Hz. 2-4

2.2 Schematic & Wiring Diagram, 50Hz 2-5

LIST OF TABLES

Tables Page

SECTION 2 TROUBLE-SHOOTING

2.1 Trouble-Shooting Guide 2-1

2.2 Ultra Steam® Function 2-3

Section Page

SECTION 3 ILLUSTRATED PARTS LIST

3.1 General 3-1

3.2 Ordering Information 3-1

3.3 Index of Illustrated Parts 3-1

Figure Page

SECTION 3 ILLUSTRATED PARTS LIST

3.1 Base and Steamer Assembly 3-2

3.2 Electrical Assembly 3-4

3.3 Plumbing Assembly 3-6

3.4 Door Assembly 3-10

Tables Page

SECTION 3 ILLUSTRATED PARTS LIST

3.1 Parts List for Base and Steamer Assembly 3-3

3.2 Parts List for Electrical Assembly 3-5

3.3 Parts List for Plumbing Assembly 3-7

3.4 Parts List for Door Assembly 3-11

SECTION 1 INTRODUCTION

Ultra Steam® Convection Steamers are electrically powered high-capacity cookers featuring improved energy

efficiency. These units are designed to reduce power consumption by jacketing the cooking compartment with

the steam generator. Because the cooking compartment and steam generator are joined to become a single unit,

the need for steam supply piping has been eliminated.

1.1 Description
The Ultra Steam® Convection Steamer was designed

and built to derive maximum value from energy
supplied. Jacketing of the steam generator around the
sides and bottom of the cooking compartment
produces an efficient cooker. Steam is directed into
the cooking chamber through supply jets.

For ease of maintenance, the steam generator is
accessed from the front through the clean-out port.
This access hole allows service personnel to inspect
interior of generator for evidence of Corrosion, build­up of sediment, or other conditions which may be

detrimental to operation of unit.

1.2 Service
Should repairs be required, a network of authorized

service agencies is available to assist with prompt
service. A current Directory of Authorized Service
Agencies and service assistance may be obtained by
contacting:

Product Service Department
Market Forge Company
35 Garvey Street
Everett, MA 02149

Telephone: [phone]

The model and serial numbers must be referenced
when corresponding with Market Forge.

1-1

SECTION 2 TROUBLE-SHOOTING

PROBLEM

Clean or replace

2.1 General
This section contains trouble-shooting and

maintenance information to assist service personnel in
locating the general source of problems which may
occur with the Ultra Steam® Convection Steamer. It is
recommended that local authorized service be
obtained for assistance in. completing trouble-shooting

procedures.
Table 2-1 serves as a general guide to trouble

shooting. Before attempting to utilize this
information, service personnel should be thoroughly
familiar with the operating instructions and the function
of all controls in Operator's Manual, form number S-

2262.

2.2 Electrical Fault Isolation
Correction of an electrical failure first requires

isolation of the fault to a single circuit or component.
In most cases, the nature of the steamer will be
sufficient to isolate it to one or more circuit elements.
Table 2-2 is provided as a guide for isolating electrical
faults which may occur in operation of the cooker.
Wiring diagram and schematic diagram are provided

for locating the source of the electrical failures.

TROUBLE-SHOOTING GUIDE

This trouble-shooting guide lists some common difficulties which the operator may encounter in using the cooker,
together with possible solutions.

Probable Cause Remedy

SWITCH FAILS TO LIGHT WHEN POWER SWITCH IS PUSHED ON
a. Power to cooker is off

b. Burned out bulb-faulty switch

STEAM GENERATOR FAILS TO PRODUCE STEAM
a. Water supply valve closed
b. Purge/drain valve open
c. Faulty heating element(s)
d. Solenoid valve stuck closed
e. Water level sensor stuck

NO STEAM IN COOKER COMPARTMENT
a. Steam jets restricted
b. Door interlock switch faulty
c. Timer by -pass switch faulty
d. Thermostat faulty

DOOR LEAKS STEAM
a. Door out of adjustment
b. Drain line clogged

Locate external breaker and place it in ON position
Replace switch

Open valve
Close purge/drain valve
Replace heating elements)

a. Clean or replace valve
b. Replace coil

Clean jets with wire or replace
Replace interlock switch
Replace by -pass switch
Replace thermostat make sure proper thermostat
is used 190°F 88° C or 160°F 71°C

Adjust door catch
Clean drain line

Table 2-1 2-1

TROUBLE-SHOOTING GUIDE (cont.)

WATER EXITING THROUGH STEAM JETS
a. Generator solenoid valve stuck open a. Clean or replace valve

b. Water level sensor stuck b. Replace coil
GENERATOR FAILS TO PURGE
a. Purge/drain valve clogged a. Clean purge/drain valve
b. Unit operating b. Push ON/OFF switch to OFF position

OPEN DRAIN LINE EMITS STEAM
a. Condenser solenoid valve stuck closed a. Clean or replace valve

b. Condensate thermostat faulty b. Replace coil Replace thermostat
c. Wat er supply to condenser off Open water inlet

TIMER DOES NOT FUNCTION
a. Timer faulty a. Turn timer past 10-minute mark to verify operation

b. Check electrical connections
c. Replace timer

b. Timer by -pass switch faulty a. Place by -pass switch in timer controlled (left) position

b. Replace by -pass switch