Market Forge STM-E Installation Manual

STERILMATIC

ANALOG ELECTRIC STERILIZER

INSTALLATION - OPERATION - MAINTENANCE

MODELS

 STM-E
 STM-EL
 STM-EX
 STM-ELX

44 Lakeside Avenue, Burlington, Vermont 05401 USA

Telephone: [phone] Fax: [phone]

www.mi.com PN 14-0411 Rev C (12/15)

© 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 ..................................................... 3

Installation Instructions ................................................... 4

Optional Cold Water Condenser ........................................... 5

Pan Supports and Bafes ................................................. 6

Optional Stands .......................................................... 8

Optional Recording Thermometer.......................................... 9

OPERATION

Operating Instructions ................................................... 10

Minimum Sterilization Times ............................................. 11

MAINTENANCE

Cleaning ............................................................... 12

Warranty ............................................................... 13

ERRORS: Descriptive, typo­graphic or pictorial errors are
subject to correction. Speci­cations are subject to change
without notice.

Introduction

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 6500 ft (2000 m)

• 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).

INTENDED USE - DUTY CYCLE

This unit is intended to be operated intermittently. After a
pre-heat cycle, the longest period of use is 60 minutes.
The timer allows a maximum of 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 relled when necessary.

SERVICE & TECHNICAL INFORMATION CONTACT

WARNING

This unit should be serviced by qualied 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.mi.com.

WATER CONDITIONS

When sterilizing culture mediums that generate sul-

de sas 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-E and STM-EL. 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.

• 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.

INSTALLATION

• 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.

2

Service Connections

ELECTRICAL SPECIFICATIONS

Domestic

Models

STM-E

STM-EL

Export

Models

STM-EX

STM-ELX

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]

4.63 [117]

2 [57]

23 [584]

1 [25]

6 [152]

Customer provided Drain Catch Pan

Approx. 4-6 quarts (3.8-5.7 liters)

B

Figure 1

SEE NOTE 2

B1

A

4 [102]
ADJ. LEGS

DOOR IN

OPEN POSITION

21 [533] CHAMBER

9 [230]

9 [228]

CLEARANCE

Locate electric box as close to

C

sterilizer as possible and per

local electrical codes

12 [305]

11 [280]

CLEARANCE

CONDUIT

3 [76]

D

3

INSTALLATION