Market Forge Industries ST-E Guide

SERVICE & PARTS MANUAL
ELECTRIC STEAM-IT STEAM COOKER, STYLE C
35 Garvey Street
Everett, MA 02149
Form Number 5143B 12/85 Printed in U.S.A. Tel. [phone], Telex 94-9414, Cable MAFORCO
MODEL:
ST-E

HOW TO USE THIS MANUAL
This manual contains maintenance and service instructions for the Style C, ST-E Electric Steam-It. Only ST-E
Steam-Its which have serial numbers prefixed with the letter "C" may be serviced according to the instructions
in this manual.
The exploded view drawing of components are aids to the identification, dis-assembly and assembly of parts.
The parts listings provide information necessary for the ordering of replacement parts (proper part names and
part numbers). When requesting parts or service, always furnish the model and serial number of your unit
These numbers are located on the name plate affixed to the top surface of the Steam-It.
TABLE OF CONTENTS
Master Illustration & Parts list 5145
Buzzer, Door Assembly & Gasket 5136
Door Adjustment & Removal 5067
Door Handle Assembly 5119
Fulcrum, Drain Assembly 5146
Safety Valve, Flue, Pressure Gauge & Steam Trap 5147
Exhaust Valve (Old Style) 5148
Exhaust Valve (New Style) 5149
Timer, Low Water Cut-Off & Timer Control Switch 5152
Element Control Switch 5153
Steam-It Stand & Pilot Light 5154
24 Inch Cabinet Base 5011A
Trouble Shooting Guide 5155
Wiring Diagram 5156
Wiring Diagram 5157
Wiring Diagram
Wiring Diagram
Wiring Diagram

ST-E STEAM-IT STYLE C MASTER
ILLUSTRATION PARTS LIST
Item No. Description Part No.
1Baseplate Ass'y —Fixed 95-3301
2Transformer (440/480 V Units 10-5234
3No 10 Lockwasher (stainless steel) *
4No 10-32 x 1/2"Binding Hd Screw (st'n st'l) *
5Lead Ass'y, Transformer 95-3394
6Plug Button 10-3095
7Plate-Term Strip Support 95-3289
8Cover-Term Box 95-3484
9No 8-32 x 3/8" Rd Hd Screw (st'n st'l) *
10 Ground Lug 10-6969
11 Connector 95-3500
12 Reducing Washer 10-6967
13 Junction Box Cover 95-3489
14 Terminal Strip Section 10-6962
15 Term Strip, End Section 10-6963
16 Baseplate sub-Ass'y —Movable 95-3302
17 Contactor-208V, 50/60 Cycle, Complete 10-5466
Contactor-230/240V, 50/60 Cycle, Complete 10-5467
18 Coil-208V, 50/60 Cycle 10-5470
Coil-230V, 50/60 Cycle 10-5471
19 Low Water Cut-Off 10-5990
20 No 6-32 x 1/4" Truss Hd Screw (st'n st'l) *
21 Connector 10-6966
22 Pressure Control-Open on Rise 95-0998
23 Pressure Control-Closed on Rise 95-0999
24 No 10-32x 1/2";Rd Screw (st'n st'l) *
25 Adapter-Straight 1/4 O.D -1/4 I P.S.M 10-2904
26 Adapter-Tee 1/8 I.P.S-1/4 O.D-1/4 0.D.M 10-3426
27 Reducing Bushing 1/4-1/8 I P S 10-3652
28 Tube 95-3305
29 Tube-Pressure Control 95-3304
30 Union-Compr Fitting 1/4 O.D 10-1154
31 Tubing-Steam Press Line 95-3387
32 Timer, 60-Minute 95-3404
33 Bracket, Timer 95-3277
34 Knob Dial 10-6307
35 Bracket-Pilot Light 95-3403
36 Lock Washer 10-2509
37 Hex Nut 10-32 10-2340
38 Pilot Light 10-6669
39 Exhaust Silencer 10-4963
40 Cage, Electric Wires 95-0483
41 Conduit-Nipple 10-6964
42 Speednut, #6-32 10-4110
43 Washer 95-0463
44 No 10-32 x 3/8 Hex Socket Hd Cap Screw (st'n
st'l) *
45 Door Handle Ass'y Complete 95-0144
46 Drain Plug Ass'y Complete 95-0154
Item No. Description Part No.
47 Handle Bumper 10-0226
48 No 8-32 x 3/8 Binding Hd Screw Ty "Z" (st'n st'l) *
49 Safety Valve 10-4636
50 Steam Trap 10-6156
51 Adapter 10-6158
52 Old Style Exhaust Valve *
Exhaust Valve-208V, 60 Cycle, Complete 95-0944
Exhaust Valve-230-480V, 60 Cycle, Complete 95-0945
Exhaust Valve-230V, 50 Cycle, Complete 95-0946
Exhaust Valve-208 & 230V, 50 Cycle 95-0946
52A New Style Exhaust Valve (Not Shown)
Exhaust Valve-220/240V, 50/60 Hz 09-6545
Exhaust Valve-208V, 50/60 Hz 09-6536
53 Nipple, 3/8 IPS 10-3852
54 Elbow 3/8 I P S st'd 90° 10-3851
55 Buzzer (Complete) 10-6665
56 Fulcrum & Drain Ass'y 95-0115
57 5/16-18 x 11/2" sq Hd Screw (st'l Cad PI) *
58 5/16 Flat Washer, 3/8 I D x #16 Ga St'd (st'l Cad PI) *
59 Hex Nut, 5/16-18 (st'l Cad PI) *
60 Connector, 3/8-90° 10-5036
61 Front Lower Panel Ass'y 95-3388
62 Nameplate Panel (60 Cycle) 10-6595
63 Nameplate Panel (50 Ccyle) 10-7096
64 Rod 95-0466
65 Pan-Insulation 95-0465
66 Stud 10-1937
67 Pan Rack Ass'y-Right Side 95-2545
68 Pan Rack Ass'y -Left Side 95-2546
69 1/4 Shakeproof Int Tooth Lockwasher (st'n st'l) *
70 1/4-20 x 3/4" Rd Hd Screw (st'n st'l) *
71 1/4-20 x 78" Hex Hd Screw (st'n st'l) *
72 Case-Top Front Upper 95-3131
73 Case-Left Side 95-3140
74 Case-Right Side 95-3141
75 Case-Back 95-3490
76 No 8 x 3/8" Phil Truss Hd Screw Ty "A" (st'l, Ni PI) *
77 Flue Ass'y 95-3135
78 Pressure Gauge 10-0883
79 Tubing-Press Gauge 95-3270
80 Door Assembly, Complete 95-0124
81 Body Assembly (208V and 236V) 95-0478
Body Assembly (470V) 95-0479
*These parts are available at local hardware, plumbing and electrical outlets If not obtainable, special priceswill be quoted by Market Forge
on request

THE BUZZER
The function of the Buzzer is to signify to the operator that the
cycle of cooking has been terminated
The Buzzer is mounted on a bracket which is positioned at the
front of the unit just under the front removable panel.
HOW THE BUZZER WORKS
The Buzzer electrical circuit is controlled by the timer When
the timer reaches "ZERO" (at the end of the cooking cycle),
the circuit will be completed and the Buzzer will continue to
sound until the timer knob is turned to the "OFF" position
THE COOKER DOOR ASSEMBLY
The door of the Cooker has been engineered to establish a
positive method of sealing the steam pressure within the
cooking cylinder As steam pressure builds up within the
cylinder, the door seal will tend to become more positive
However, the door should be adjusted to make a good initial
seal between the door gasket and the door opening without
the added assistance of internal cylinder steam pressures.
With the simple action of securing the door handle down in a
locked position, the door gasket should be sufficiently
compressed against the door opening, all the way around, to
prevent any steam leakage from occurring.
DOOR ASSEMBLY -Parts List
Item Description Part No.
1Pivot Spring Bearing .....……….... 10-6765
2Door Lift Springs (pair) . ..………... 10-2785
3 10 -32 Machine Screw 1/2" long …10 1776
4Door Gasket ....... ..………………. . 10-2666
5Door & Door Spring Assy. .………. 95-3204
6Door Spring ...... ……………… . 95-0127
—Complete Door Assembly
(Items 1 thru 6) .....………. 95-0124
THE DOOR GASKET
Keep the gasket clean. With normal closing and locking of
the door assembly, a steam-tight seal should be made
between the door gasket and the door opening. This seal
cannot be maintained if particles of foreign matter are
allowed to accumulate upon either of the contacting
surfaces
If leakage should occur by the door gasket before the
additional pressure of a steam build up within the cooking
chamber causes it to stop, the door assembly must be
regarded as improperly adjusted and a readjustment must
be made of the adjustment screw.
To change the door gasket, remove the entire door
assembly as a unit, remove and discard the old gasket,
replace it with a new one (no cement is required), and
reinstall the door assembly. Make an operational check
for leakage and adjust the door if necessary.
5136

DOOR ADJUSTMENT
The door adjustment is located in the fulcrum casting at the base
of the door opening. This adjustment employes the use of a
screw and locknut. To adjust the Cooker door to a tighter closed
position (to prevent steam from leaking by the door gasket as
pressure builds up), it is necessary to loosen the locknut and
back off the screw at least one-quarter of a turn and retighten the
locknut.
TO REMOVE THE DOOR ASSEMBLY
The Door Assembly can be removed from the inner cooking
chamber as a unit without the use of any special tools or
equipment. However, a systematic approach to this is warranted
as the clearances through the portal are close and much
confusion can result if not removed in the sequence described
below.
1. First, lift off and remove the two pan supports to expose the
door linkages on either side of the inner cooking chamber.
2. Raise the door to a fully opened position and disengage the
door spring from each of the door spring studs. Accomplish
this by counter-acting the forceof the door lift spring with one
hand while working the end of the door spring of the door
assembly.
3. When the ends of the door spring have been completely freed
from their respective door spring studs, the door lift springs on
either side of the door assembly can easily be slipped off their
studs.
4. Rotate the entire door assembly out through the door opening,
passing the door handle through the opening first, and then
one end of the door spring as shown in the illustration The
remainder of the door assembly will then pass through the
door opening quite easily.
5. To replace the door assembly, reverse the step by step
procedure described above.
DOOR LIFT SPRING REPLACEMENTS
Market Forge Company supplies replacement Door Lift
Springs in sets only. This policy has been found to be in the
best interest of the customer. Through continuous use, some
of the original qualities of the springs are lost and it becomes
advantageous to make replacements to both the left and right
Door Lift Springs in the event one becomes damaged or
broken.
Replacement Door Lift Springs are marked with tabs at the
factory prior to shipping to identify a right from a left spring.
These must be installed with the right Door Lift Spring on the
right and the left Door Lift Spring on the left of the door as
viewed from the front of the Cooker.
5067

DOOR HANDLE ASSEMBLY -PARTS LIST
Item Description Part No.
1No. 10 -32 Acorn Nut...... 10-2318
2
#10
Shakeproof Lockwasher
. . .
10
-
2514
3Locking Screw .............. 10-1999
4
Bearing Spacer
..............
95
-
0120
5
3/8"
Shakeproof Lockwasher
. .
10
-
2517
6
Door Lock Knob
............
10
-
0050
7
Door Handle Casting
.........
95
-
0134
8
1/4"
-
20
Acorn Nut
.........
10
-
2359
9Door Handle Bearing Stud .... 95-0658
*0btain
at local hardware store
Item Description Part No.
10 Door Handle Bearing Bracket ...... 95-0659
11
1/4"
Shakeproof Lockwasher
..
10
-
2513
12
1/4"
-
20
x
5/8"
Rd. Hd. Screw
...
10
-
1731*
13
Door Lock Ass'y.
.....
.........
95
-
3223
14
Door Lock Knob Ass'y.
(Items
1
thru
6
plus
13)
95-0145
15 Complete Door Handle Ass'y.
(Items
1
thru
13) .........
95-0144
5119

FULCRUM & DRAIN ASSEMBLY
The Fulcrum and Drain Assembly is located at the lower
front of the cooking cylinder and furnishes a sturdy
anchorage for the door locking system of the door handle
Also provided in this assembly is a means of adjustment for
the door seal The drain port and drain plug provide a means
of discharging accumulations of water from the cooking
cylinder
ROLLER ASSEMBLY
Built Prior to 10/85 (Items 5, 6, 7, 8 & 9) Built after 10/85
(Items 2, 8, 9, 13 & 14) The Roller Assembly must be kept
free-rolling at all times Should this assembly be allowed to
become frozen due to lack of lubrication, undue strain will be
put on the door handle and the fulcrum casting while the
door is being lockedUse only a dry lubricant such as
graphite,as oil or grease will tend to attract dirt to this area
5146

SAFETY VALVE
The Safety Valve is set to automatically relieve the cooking
compartment of excessive pressure build-ups by opening at a point
between 15 1/2 Ibs and 16 Ibs
CHECKING SAFETY VALVE
If the Safety Valve should leak continuallywith a pressure build-up,
or should it cause an interruption of the cooking cycle prematurely
(less than 15'/2 Ibs on the steam gauge), it must be determined to
be defective and be replaced However, the steam gauge should first
be checked for accuracy before making this determination The
steam gauge should register absolute zero with no pressure in the
cooking cylinder If the normal zero setting has advanced somewhat
through usage (a characteristic of steam gauges), the amount of
advancement from absolute zero must be subtracted from its
registered reading to determine the true steam pressure
THE FLUE
The Flue serves as a protection shield for the Steam Trap (B) Safety
Valve (A) Exhaust Valve (D) as well as a front-facing mount for the
Steam Gauge (E) Asservicing of these parts may at times require
the removal of the flue, an exploded view drawing is provided to
show their proper relative positions within the flue and the method of
their assembly to the cooking cylinder
TO REMOVE THE FLUE
1Unscrew and remove the exhaust silencer (F)
2Detach the 3/16" copper tube connector (C) from the Steam
Gauge (E) at the ferrule nearest the steam gauge Then, remove
the copper tube entirely by freeing it at the other ferrule
3Apply inward pressure at either sides of the Flue at points(1)and
(2) with a screwdriver This will collapse the side walls slightly to
allow the small fluted sections of sheet metal to clear the edges
of the flue opening provided in the outer shell of the Steam-It
With the restrictions of the flutes removed, the Flue may then be
lifted up over the parts it houses
4To replace the Flue reverse the above steps
STEAM GAUGE
Located at the top rear of the Steam-It and mounted into the
forward face of the flue for visibility, the Steam Gauge registersthe
pressure within the Steam-It cooking chamber To replace this unit it
is necessary to disconnect the 3/16" copper tube connector and
remove the two nuts holding the gauge framework in place
STEAM TRAP
The Steam Trap is located within the flue at the top rear of the
Steam-It It has the very important automatic, dual function of
exhausting all cold air from the cooking compartment and of making
a suitable seal to allow a pressure build-up of live steam during the
cooking cycle Failure of this unit to operate properly will result in
uneven cooking
HOW IT WORKS
With the introduction of steam into the cooking compartment, the
cold air escapes through the Steam Trap When sufficient generated
steam dispalces the cold air it passes through the Steam Trap and
the thermostatic element becomes heated and expands to ' make a
seal against the seat This action encloses the live steam within the
cooking compartment and allows a steam pressure build-up to
occur
TROUBLE TESTS AND REMEDIES
the first indication of defective Steam Trap operation will usually be
evidenced by uneven cooking If working properly, the steam
temperature will be even and cooking will be uniform through the
cooking compartment Trouble may occur either through premature
closing of the Steam Trap before all the cold air has been
exhausted or by its failure to close sufficiently to enable a proper
steam pressure build-up Either case warrants the replacement of
the Steam Trap
5147
D Old Style Shown

ST-E EXHAUST VALVE-Parts List