Market Forge 2600HE Service Manual
SERVICE & PARTS MANUAL
Models:
Power Saver II Electric Convection Oven
2600HE
MARKET FORGE CANADA LTD.
Mississauga, Ontario, Canada
Form Number 17-0393 3/81
2692HE
2800HE
2892HE
TABLE OF CONTENTS
Paragraph Page
SECTION 1 INTRODUCTION
1.1 Description 1-1
1.2 Oven Components 1-1
1.3 Basic Functioning 1-1
1.4 Service 1-1
SECTION 2 INSTALLATION
2.1 Receiving 2-1
2.2 Assembly 2-1
2.2. 1 Single Oven On Modular Base 2-1
2.2.2 Oven On 7"{178mm) Stand 2-1
2.2 3. Stacked Ovens On 7" (178mm)
Stand 2-1
2.2.4 Oven on 28"( 711 mm) Open
Stand 2-1
2.3 Electrical Connection 2-3
2.4 Installation Check-Out 2-3
2.4.1 Oven Check Out & Adjustments 2-3
2.4.2 Shut -Down Procedure 2-4
SECTION 3 OPERATION
3.1 Operating Controls and Indicators 3-1
3.2 Operating Procedures 3-1
3.2.1 Preheating 3-1
3.2.2 Cooking 3-1
SECTION 4 PRINCIPLES OF OPERATION
4.1 General 4-1
4.2 Heating Circuits 4-1
4.3 Electrical Circuits and Controls 4-1
4.3.1 Circuit Breaker 4-1
4.3.2 On-Off Switch 4-1
4.3.3 Door Interlock Switch 4-1
4.3.4 Thermostat Control 4-1
4.3.5 Indicator Light 4-1
SECTION 5 TROUBLE-SHOOTING
5.1 General 5-1
Paragraph Page
5.2 Trouble-Shooting Guide 5-1
5.3 Electrical Fault Isolation 5-2
5.4 Electrical Trouble-Shooting
Procedures 5-2
5.4.1 Incoming Power 5-2
5.4.2 Electrical Inspection 5-2
5.4.3 Thermostatic Control 5-2
5.4.3.1 Thermostat Contacts 5-2
5.4.3.2 Thermostat Capillary 5-2
5.4.4 Wiring 5-3
SECTION 6 MAINTENANCE
6.1 General 6-1
6.2 Preventive Maintenance 6-1
6.3 Adjustment Procedures 6-1
6.3.1 Oven Door Adjustments 6-1
6.3.1.1 Door Catch Adjustment 6-1
6.3.1.2 Door Switch Adjustment 6-1
6.3.1.3 Oven Door Horizont al Adjustment 6-2
6.3.1.4 Oven Door Vertical Adjustment 6-2
6.4.1 Control Panel and Contactor
Removal 6-2
6.4.2 Right Side Panel Removal 6-2
6.4.3 Fan Disassembly and Repair 6-2
6.4.3.1 Fan Blade Removal 6-2
6.4.3.2 Fan Motor Removal 6-3
6.4.4 Heating Element Removal 6-3
6.4.4.1 Rear Heating Element Removal 6-3
6.4.4.2 Bottom Heating Element Removal 6-3
6.4.5 Thermostat Removal 6-3
SECTION 7 ILLUSTRATED PARTS LIST
7.1 General 7-1
7.2 Ordering Information 7-1
7.3 Index Of Illustrated Parts List 7-1
iii 17-0393
LIST OF ILLUSTRATIONS
17 0393
IV
Figure
SECTION 2 INSTALLATION
2-1 Counter Stand Assembly 2-2
2-2 Stacked Oven Assembly 2-2
2-3 Open Stand Assembly (Inverted) 2-2
2-4 Electrical Connection 2-3
SECTION 3 OPERATION
3-1 Operating Controls & Indicators 3-2
SECTION 5 TROUBLE SHOOTING
5-1 Wiring Diagram, 208/240 V 5-4
5-1 Wiring Diagram, 440/480 V 5-5
5-3 Wiring Diagram, 220/240/380/415V. 5-6
LIST OF TABLES
Table Page
SECTION 3 OPERATION
3-1 Operating Controls & Indicators 3-2
Figure Page
5-4 Schematic Diagram, 208/240/380 V. 5-7
5-5 Schematic Diagram, 440/460/480 V. 5-8
SECTION 6 MAINTENANCE
6-1 Blower Guard/Deflector Assembly 6-1
6-2 Wheel Puller Kit Components 6-2
SECTION 7 ILLUSTRATED PARTS LIST
7-1 Cabinet & Frame Assembly 7-2
7-2 Door Assembly 7-4
Heating Element Assembly 7-6 7-3
Control Panel Assembly 7-8
Table Page
SECTION 5 TROUBLE-SHOOTING
5-1 Trouble-Shooting Guide 5-1
5-2 Electrical Fault Isolation Guide 5-3
SECTION 1 INTRODUCTION
1-1
17-0393
This service and parts manual contains general information, installation, operation, principles of operation, trouble-
shooting and maintenance information for the Market Forge Power Saver II High Efficiency Electric Convection
Oven. Also included are parts lists, in which each replaceable part is identified and shown in an accompanying
exploded view.
1.1 DESCRIPTION
The Market Forge Power Saver II High Effi ciency
Electric Convection Oven is an electrically powered
convection ove n designed to achieve high-volume
cooking with a minimum of power consumption. The
unit consists of a heavily insulated cooking
compartment fitted with a convector fan and heated by
electric elements. All oven controls are located on a
recessed panel on the right front of the oven as seen
from the front.
1.2 OVEN COMPONENTS
The major assemblies of the Power Saver II are
the stainless steel or baked enamel-finish cabinet
enclosure, solid doors, stainless steel cooking
compartment with nine-position shelf supports,
heating element and contactor assembly, and control
panel assembly. Controls and indicators include the
thermostat, main power switch, ELEMENTS on
indicator light, 60-minute and 5-hour timers, and twopole circuit breaker. The oven is available in a variety
of mounting configurations: 7" 178mm high counter
stand, on legs with shelf and optional storage rack, or
stacked on top of another Power Saver II with the
bottom unit on 6" 152mm stainless steel legs.
1.3 BASIC FUNCTIONING
The Power Saver II becomes operational when the
power switch is placed in the ON position, doors are
closed, and thermostat set. Contactors located in the
control section close the
circuit to heating elements located underneath and at
the rear of the cooking chamber. When the chamber
reaches the preset temperature, the thermostat
contacts open, causing the contactors to interrupt the
circuit to the heating elements. When the temperature
in the chamber drops enough to close the thermostat
contacts, the circuit closes again. Any number of such
cycles might occur during the cooking time, indicated
by the ELEMENT indicator light coming on and off.
1.4 SERVICE
Required service, both preventive and corrective, is
explained in section 6. 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
35 Garvey Street
Everett, Massachusetts 02149
(617) 387-4100
Product Service Department Market Forge
Canada, Ltd. 1375 Aimco Blvd., Unit 5
Mississauga, Ontario, Canada L4W 1B5
(416)621-9252
The model and serial number must be referenced
when corresponding with Market Forge. The data
plate with serial number is located on the center of the
bottom front trim ledge.
SECTION 2 INSTALLATION
2.1 RECEIVING
The unit is shipped strapped and bolted to a skid,
and covered by a corrugated container. Packing
materials must be removed prior to installation
Examine shipment for external or internal damage
and completeness. A complete shipment normally
includes the oven unit, two shelf supports and five
interior shelves, a carton containing stand
components (if a stand has been specified), and a
packet of documents pertaining to the unit.
GENERAL CAUTION: Tilt oven onto back or left
side (seen from front) to access bottom when
necessary DO NOT AT ANY TIME LAY THE OVEN
DOWN ON ITS TOP , RIGHT SIDE, OR FRONT TO
DO SO MAY DAMAGE THE EQUIP MENT AND
INVALIDATE THE WARRANTY.
2.2 ASSEMBLY
Set-up assembly procedures for the various oven
configurations are described in the following
paragraphs. Assembly requires that the stand be
completely assembled first, then set in place and the
oven mounted upon it before service connections
are completed.
2.2.3 Stacked Ovens on 7" (178mm) Stand
1. Mount bottom oven on stand (Figure 2-2) using
hex head screws and washers provided.
NOTE
Stand is 32" 813mm front to back. When used
with deep oven, overhang may be either front or
back, as desired. (Recommended overhang is in
back)
2. Remove upper trim strip screws on front of lower
oven. This is necessary to permit door
adjustment, if required, at a later date.
3. Stack top oven on bottom oven.
NOTE
If stacked ovens are adjacent to moisture
producing equipment (such as kettles or steam
cookers) it is necessary to prevent
condensation from entering the control section
of the bottom oven. The seam between the two
ovens, and between the ovens and the moisture
producing equipment, must be sealed with
silicone synthetic rubber or equal high grade
sealant.
4. Proceed to subsection 2.3.
2.2.1 Single Oven on Modular Base
1. Screw adjustable feet into cabinet base.
2. Mount oven to base using four 3/ 8 - 1 6 x 3/4 Ig.
hex head cap screws and four 3/ 8 plain
washers provided.
3. Proceed to subsection 23.
2.2.2. Oven on 7" (178mm) Stand
1. Screw legs ( Figure 2-1, #4) into top frame assembly
(1).
2. Place into position front and rear channel assembly
(2) and side angles (3). These items are loose parts
and are secured with mounting of oven to stand.
3. Mount oven to stand using four % - 1 6 x % Ig. hex
head cap screws and four % plain washers
provided.
4. If oven is to be stacked, proceed to paragraph 2.2.4.
2.2.4 Oven on 28" (711mm) Open Stand
1. Plac e top frame (Figure 2-3, #2) upside down on a
clean, smooth surface.
2. Place front and rear angle assemblies (8)
(Stainless stands only) and legs (1) into position.
3. Align holes in legs, frame and angles. Secure
using carriage bolts, lockwashers and hex nuts
provided.
4. Align holes in shelf (3) with leg holes and secure
using hardware (5,6,7).
5. Screw adjustable feet (4) into stand legs.
6. Install four clips for oven rack supports inside top
frame using hardware (5,6,7) (included with rack
support opt ion).
7. Place stand in upright position. Install rack.
2-1
17 0393
2-2 POWER SAVER II ELECTRIC CONVECTION OVEN
Figure
2-1
Counter Stand Assembly
. 17-0393
Figure 2-2 Stacked Oven Assembly .
Figure 2-3 Open Stand Assembly (Inverted)
INSTALLATION 23
supports (if supplied), inserting ends through
holes in clips and shelf.
8. Mount oven to stand using four 3/8 - 1 6 x 3/4 Ig.
hex head cap screws and four 3/8 plain washers
provided.
2.3 ELECTRICAL CONNECTION
Where applicable, all wiring shall be done in
accordance with the Canadian Electrical Code ANSI
C1 - 1975. Figures 5-1, 5-2 and 5-3 show the
various internal wiring configurations for the different
models and voltages.
1. Pull bottom trim panel forward to release
from spring catches and lower to full open
position as shown. See Figure 2-4.
2. Remove screws and terminal block cover
(3,2).
3. Bring power supply line in through 1 3/4"
44mm access hole in rear panel and feed
through conduit.
NOTE
If desired, right side panel(s) may be removed
from oven(s) to facilitate connec tion.
5. If required, ground unit to ground lug located at
lower right (seen from front) of terminal block.
Consult appropriate electrical codes.
2.4 INSTALLATION CHECK-OUT
After the oven is completely assembled and
properly located with electrical supply connected, the
unit should be given a thorough check-out before
being put into operation. Check-out procedures for
the oven are given in subsection 2.4.1. If the unit fails
to operate as described, consult the trouble-shooting
guide in Section 5 for corrective action.
Before making this check-out, the operator must
be thoroughly familiar with the operating procedures
in Section 3, and with the function of each control
described in Table 3-1. Reference Figure 3-1 for
identification of controls.
2.4.1 Oven Check-Out & Adjustments
Begin check-out procedure with power switch and
thermostat dial in OFF positions. A final check of the
controls and connections should be made as follows:
1. Make sure that the fan guard and deflector
are properly installed. See Figure 6-1.
4. Connect line to terminal block. This is a 1/2" 1
3mm conduit connection. Use wire suitable for at
least 90°C.
17-0393
Figure 2-4 Electrical Connection.
24
2. Seat wire shelf supports in mounting locations
inside oven, and slide shelves into position with
raised 'stop' edge at rear.
NOTE
Make sure wire shelf supports are in, not on,
brackets
3. With a level on the oven shelves, make sure the
oven is level both front and back, left and right To
adjust, turn feet in stand legs.
4. Make sure power supply is available to the oven
5. Set thermostat dial at 350°F.
6. Place power switch in the ON position with doors
open
7. Close doors. Indicator light should come on;
fan should come on and rotate clockwise
POWER SAVER II ELECTRIC CONVECTION OVEN
(seen from front). If not, see Table 5-1.
8. Indicator light will remain on while oven is heating,
and go out when preset temperature is reached.
During the heat -up period, some slight smoke or
fumes may be produced by oil or grease on metal
surfaces. This should cease after five minutes.
9. After this check is completed, turn thermostat dial
and power switch to the OFF position.
2.4.2 Shut-Down Procedure
1. For daily shut -down, place thermostat dial and
power switch in OFF position.
2. For extended shut -down, place thermostat dial and
power switch in OFF position. Leave doors ajar.
170393
SECTION 3 OPERATION
3.1 OPERATING CONTROLS AND
INDICATORS
All the controls required to operate the oven are
listed in Table 3-1, with a short functional description
of each. Figure 3-1 shows the physical location of
each control and indicator.
3.2 OPERATING PROCEDURES
Before attempting to use the oven for cook ing, be
sure that proper electrical connections have been
made, and fan guard and deflector are properly
mounted. (See Figure 6-1).
3.2.1 Preheating
1. Arrange shelf positions according to the item to be
cooked. Refer to Test Kitchen Bulletin #41 for
correct positioning.
2. Place ON-OFF switch in the ON position and
close doors. Fan will begin rotating. If not, reset
circuit breaker.
3. Set thermostat dial to desired cooking temperature. Element indicator light should come on.
4. Allow oven to preheat for about 15 minutes.
Preheating is complete when indicator light
goes out. Do not waste energy by turning the
oven on too early,
3.2.2 Cooking
The oven is ready for cooking use when the
element indicator light goes off. The load should be
adjacent to the oven so that the doors will be open for
as short a time as possible.
1. Load oven.
2. Close doors and set timer for desired cooking time.
Buzzer will sound at end of preset interval.
3. Unload oven and proceed as follows:
a) If oven is to be turned off, place thermostat dial
and ON-OFF switch in the OFF position.
b) If oven temperature is to be lowered, reset the
thermostat to the desired temperature and close
the right door. Fan will continue to operate with
left door open. When light comes on, oven is at
lower temperature. Right door is then closed until
light comes on to show that temperature is
stabilized.
4. Place thermostat dial and ON-OFF switch in OFF
position for daily shut -down. For extended shutdown, place dial and switch in OFF position and
leave doors ajar.
3-1 17-0393
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