Market Forge STM-ED Installation Manual
STERILMATIC
DIGITAL ELECTRIC STERILIZER
INSTALLATION - OPERATION - MAINTENANCE
MODELS
STM-ED
STM-EDX
44 Lakeside Avenue, Burlington, Vermont 05401 USA
Telephone: (802) 658-6600 Fax: (802) 864-0183
www.mi.com PN 14-0413 Rev C (10/15)
© 2015 - Market Forge Industries Inc.
Your Service Agency’s Address:
Model
Serial number
Sterilizer installed by
Installation checked by
IMPORTANT
TABLE OF CONTENTS
WARNING: Improper installation, adjustment, alternation,
service or maintenance can
cause property damage, injury or death. Read the installation, operation and maintenance instructions thoroughly
before installing or servicing
this equipment.
FOR YOUR SAFETY
Do not store or use gasoline or
other ammable vapors or liquids in the vicinity of this or any
other appliance.
The information contained in this
manual is important for the proper installation, use, and maintenance of this sterilizer. Adherence to these procedures and
instructions will result in satisfactory baking results and long,
trouble free service. Please
read this manual carefully and
retain it for future reference.
INSTALLATION
Introduction .............................................................. 2
Service Connections ..................................................... 4
Installation Instructions ................................................... 5
Optional Cold Water Condenser ........................................... 6
Pan Supports and Bafes ................................................. 7
Optional Stands .......................................................... 9
OPERATION
General Operating Instructions ........................................... 10
Minimum Sterilization Times ............................................. 11
Digital Control Panel .................................................... 12
Detailed Operating Instructions ........................................... 13
MAINTENANCE
Cleaning ............................................................... 18
Warranty ............................................................... 19
ERRORS: Descriptive, typographic or pictorial errors are
subject to correction. Specications are subject to change
without notice.
Introduction
PRODUCT DESCRIPTION
The Market Forge Sterilmatic Sterilizer with Digital Controller (model STM-ED) is a compact, automatic, low cost
steam pressure sterilizer (autoclave).
The sterilizing cylinder is a 3/16” (4.8mm) thick wall, welded aluminum. The exterior is made of polished stainless
steel. Interior dimensions of 16” (406mm) diameter and
26” (660mm) long with a cubic content of 5,220 cubic
inches (0.085 cubic meters) and has a door opening of
13-1/2” (343mm) wide and 11” (279mm) high. The sterilizing compartment has a pan capacity of:
• (3) 12” x 20” x 2 ½” (305mm x 508mm x 64mm) or,
• (2) 12” x 20” x 4” (305mm x 508mm x 102mm) or,
• (1) 12” x 20” x 6” (305mm x 508mm x 152mm)
The sterilizer door is a self-sealing type that cannot be
opened until the steam pressure is completely exhausted
from the chamber. The door is 12 gauge stainless steel
and removable for cleaning without tools. The door gasket is one-piece molded, also replaceable without tools
or cement.
The sterilizing cycle is fully automatic with the time, temperature and venting controlled by the microprocessor
based, digital controller.
The sterilizing temperature can be set anywhere in a
range from 225°F (107°C) and 250°F (121°C). There is
an on-board data logger/printer. The data logger records
the time, temperature and pressure for each sterilization
cycle. This data can be stored for future printing or printed
out following each cycle.
OPERATING ENVIRONMENTAL CONDITIONS
This unit is designed for commercial use and to be safe at
least under the following conditions:
• For indoor use only.
• For use at altitudes up to 6500ft (2000m)
• For use at temperatures from 41°F (5°C) to 104°F
(40°C).
• Maximum relative humidity 80% for temperatures up
to 88°F (31°C) decreasing linearly to 50% relative
humidity at 104°F (40°C).
• Main supply voltage uctuations not to exceed ±
10% of nominal voltage.
• Transient overvoltages according to Installation Categories II (in accordance with IEC 664).
• Pollution Degree 2 (in accordance with IEC 664).
SERVICE & TECHNICAL INFORMATION CONTACT
WARNING
This unit should be serviced by qualied service personnel only.
Your Sterilmatic Sterilizer has been developed to answer
the need for a compact, automatic, low-cost steam pressure sterilizer. The following instructions cover installa-
tion. Should service be required, it is readily available by
contacting our authorized service agency located nearest
to you. The name of your local service company can be
obtained on our website, www.mi.com.
INTENDED USE - STERILIZATION CYCLE
This unit is intended to be operated intermittently. After
a pre-heat cycle, the longest period of sterilization (heating) should be a maximum of 60 minutes. The digital timer allows up to 99 minutes, but it should be kept at no
more than 60 minutes. After each use the unit should be
opened for removal and reloading of product. The water
level should be checked after each use and relled when
necessary.
WATER CONDITIONS
When sterilizing culture mediums that generate sul-
de gas or chlorine gas, the inside of the chamber
must be cleaned and rinsed thoroughly without fail
Market Forge from time to time is asked the question
about using distilled or deionized water for use with our
Sterilizer models STM-ED and STM-EDX. We are always
asked why these water choices are not allowed for use
with our units and what would be recommended. To address this situation, we have complied the following as a
means of satisfying these questions:
1. We have found that the use of distilled or deionized
water will aggressively attack the pure coat of Aluminum Alclad, which protects the bottom surface from
oxidizing and then eventually pitting (reference: Operating and Maintenance Instructions).
2. In addition pitting can also be caused by several other
external environmental factors. Few examples are as
follows. These conditions have been highlighted in
our documentation.
• Grains of hardness in the water supply should
be as follows (.25 to 2).
• A pH imbalance in the water supply can greatly
affect the life to the aluminum cylinder. The pH
range that would be recommended is between
7.0-8.5.
INSTALLATION
2
Introduction
• The lack of a positive electrical ground can
cause an electrolytic reaction that will accelerate
pitting.
• Another contribution to accelerate pitting is the
type of cleaning solutions used or the abrasive
scrubbing pads. If a low pH is present with the
detergents being used or an abrasive pad, the
protective Alclad coating will be removed during
the cleaning process.
• Spillage of media being sterilized can also contribute to the accelerated pitting if it is corrosive.
• CHLORINE LEVEL ≤ 1 PPM.
IMPORTANT
Market Forge will not be responsible for damage resulting from the use of hard or corrosive
water, from failure to drain the unit daily, or
from inadequate cleaning procedures.
3
INSTALLATION
Service Connections
ELECTRICAL SPECIFICATIONS
Domestic
Model
STM-ED
Export
Model
STM-EDX
kW Hz
9.3 60 45A - 26A -
12.4 60 - 52A - 30A
kW Hz
10.4 50 48A - 16A -
12.4 50 - 52A - 18A
1 Phase
208V 240V 208V 240V
1 Phase
220V 240V 220/380V 240/415V
Unit must be grounded. Main supply voltage fluctuations are not to
exceel ± 10% nominal supply voltage.
3 Phase
3 Phase
WATER SUPPLY
Good quality water feed is the responsibility of the owner. Water quality must be within the following general guidelines.
TDS: 40-125 ppm Hardness: 35-100 ppm Chlorine: <0.2 ppm
Silica: <13 ppm Chlorides: <25 ppm
Chloramine: <0.2 ppm pH: 7.0 - 8.5
The best defense against poor water quality is a water treatment
system designed to meet your water quality conditions.
Appliance to be installed with backflow protection according to federal, state or local codes.
SERVICE CONNECTIONS
A Drain - 1/2” (13mm) N.P.T. of 3/8” (10mm) OD copper
(see note 1)
B Steam Exhaust Connection - 5/8” (16mm) (see note 2)
C Electrical Connection - (*see electrical specifications
table)
D Power Supply
NOTES:
1. An air break must be provided if a unit drain line is run.
2. Vent exhaust to atmosphere. B1 is actual connection, but
must exit casing at B.
IMPORTANT: Exhaust line must be vented to the outside to eliminate the exhaust steam and the accompanying noise from entering the room. Use 1/2” (13mm) copper tubing or suitable alternate.
The overall height and length of the line should not rise more then
4’ (1.2 meters) above the unit and exceed 15’ (4.5 meters) with a
minimum of bends. The line should slope downward after leaving
the sterilizer in order to ensure condensate drainage.
IMPORTANT: Failure to comply with this outline will affect the
sterilization process.
When an exhaust condenser is supplied; the following services
must be provided: 1/2” (13mm) cold water: 1” (25mm) waste: 115V
electrical line.
DIMENSIONS ARE IN INCHES [MM]
18.69 [475]
3.5
[89]
15.5
[394]
D
9.34 [237]
C
A
CONDUIT
B
B1
SEE
NOTE 2
1.5 [38]
4.75
[121]
25 [635]
30 [762]
STEAM SHIELD
3 [76]
5.63
[143]
23 [584]
C
1 [25]
6 [152]
Customer provided Drain Catch Pan
Approx. 4-6 quarts (3.8-5.7 liters)
Figure 1
B
SEE NOTE 2
B1
A
4 [102]
ADJ. LEGS
STEAM SHIELD
DOOR IN
OPEN POSITION
21 [533] CHAMBER
9 [230]
CLEARANCE
9 [228]
CLEARANCE
CONDUIT
Locate electric box as close to
C
sterilizer as possible and per
local electrical codes
12 [305]
11 [280]
3 [76]
D
INSTALLATION
4
Installation Instructions
INSTALLATION
Set sterilizer on counter, using the 6” (152mm) legs provided or assemble the optional stainless steel stand with
under-shelf. If your Sterilmatic includes a water-cooled
exhaust condenser, we recommend the use of the Sterilmatic stand, part number 95-6060. First, level unit in
place, then adjust rear legs to pitch the unit forward 1/4”
(6mm) to insure positive drainage of the cylinder.
ELECTRICAL
Connect to proper electrical supply box and disconnect
switch as shown on one of the following schematic diagrams - 208 or 240 volts, single or three phase. Connection is made from the rear of the unit, through the conduit
to the terminal box located at the front of the unit.
Electric supply connection for STM-ED
Connect to proper electrical supply as indicated on nameplate on top of unit. The power supply cord is brought in
from the rear of the unit, through the conduit and the connection is made at the terminal box located at the front of
the unit.
Electric supply connection for STM-EDX (export models)
Connect to proper electrical supply as indicated on nameplate on top of unit. Connection is made from the rear of
the unit, through the conduit to the terminal box located at
the front of the unit. All control circuits are 220 volts.
In order to accomplish this, a current-carrying grounded
neutral must be provided.
Thus, a three phase system must be 4-wires. Most elec-
trical codes require, and we recommend, that a separate
switch be located within sight of the sterilizer.
OUTSIDE VENTING
Connect 1/2” (13mm) nominal tubing exhaust to outside
vent connection located on top of unit, within the control
housing.
IMPORTANT: Exhaust line must be vented to the outside to eliminate the exhausted steam and the accompanying noise from entering the room.
Use 1/2” (13mm) copper tubing or suitable alternate. The
overall height and length of the line should not rise more
then 4 feet (1.2 meters) above the unit and exceed 15 feet
(4.5 meters) with a minimum of bends. The line should
slope downward after leaving the sterilizer in order to insure condensate drainage.
WATER-COOLED EXHAUST CONDENSER
If outside venting is not possible, an optional water-cooled
condenser is available for connection to an open drain. If
required order part no. 95-0436 kit.
TRAY SUPPORTS
Install side tray supports. Tray supports are attached by
means of key-hole clearance slots which are slipped over
studs located on the sides of the Sterilmatic chamber.
BAFFLE INSTALLATION
To insure maximum drying of packs, a bafe is supplied
with your Sterilmatic. Place perforated splash bafe in
bottom of the sterilizing chamber. Install small bafe with
no perforation at the rear of the upper tray support channel.
NOTE: The perforated bafe is not to be used as a shelf
to place media or other items. It is intended to
eliminate splashing.
OPERATION CHECK
To check for proper operation of unit:
1. Close drain valve by turning handle clockwise.
WARNING
DO NOT OPEN DRAIN VALVE WHILE UNIT
IS OPERATING. PREMATURE OPENING MAY
RESULT IN SCALDING OF OPERATOR.
2. Fill chamber with 4 to 5 quarts (3.8 to 4.7 liters) of
ordinary tap water. DO NOT USE DISTILLED OR DEIONIZED WATER.
3. Close chamber door.
4. Set exhaust selector to INSTRUMENTS AND PACKS
(fast exhaust) or LIQUIDS (slow exhaust).
5. Set timer to 15 minutes. Cycle will go to completion
automatically.
5
INSTALLATION
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