Shellab SCO26H-2 User Manual

HUMIDITY CHAMBER

SCO26H SCO26H-2

PREVIOUSLY DESIGNATED

2428H 2428H-2

WITH MICRO PROCESSOR CONTROL

INSTALLATION AND OPERATION INSTRUCTIONS

Revised 01/2014

4861693

Sheldon Manufacturing Inc. P.O. Box 627 Cornelius, Oregon 97113

EMAIL: [e-mail] INTERNET: http://www.Shellab.com/~Shellab

1-800-322-4897 [phone] FAX [phone]

TABLE OF CONTENTS

SECTION 1.0 RECEIVING AND INSPECTION
SECTION 2.0 GRAPHIC SYMBOLS
SECTION 3.0 INSTALLATION AND FACILITIES REQUIREMENTS
SECTION 4.0 CONTROL OVERVIEW
SECTION 5.0 THEORY OF OPERATION
SECTION 6.0 OPERATION
SECTION 7.0 MAINTENANCE
SECTION 8.0 TROUBLESHOOTING
SECTION 9.0 PARTS LIST
SECTION 10.0 UNIT SPECIFICATIONS
SECTION 11.0 HUMIDITY VS CONDENSATION CHART
SECTION 12.0 WIRING DIAGRAM
SECTION 13.0 PLUMBING DIAGRAM

These units are TUV CUE listed as CO2 incubators for professional, industrial, or educational use
where the preparation or testing of materials is done at approximately atmospheric pressure and no
flammable, volatile, or combustible materials are being heated.

These units have been tested to the following requirements:
CAN/CSA C22.2 No. 61010-1:2012

CA N/CSA C22.2 No. 61010-2-010 + R:2009
UL 61010-1:2004 + R:2005-07 + R:2008-10
UL 61010A-2-010:2002
UL 61010-1:2012
EN 61010-1:2010
EN 61010-2-010:2003

IEC 61010-1:2010
IEC 61010-2-010:2003

INTRODUCTION

Section

Thank you for choosing a humidity testing incubator. These units are not intended for use at hazardous or household
locations.

Before you use the unit, read this entire manual carefully to understand how to install, operate, and maintain the unit
in a safe manner. Your satisfaction with the unit will be maximized as you read about its safety and operational
features.

Keep this manual for use by all operators of the unit. Ensure that all operators of the unit are given appropriate
training before you put the unit in service.

Note: Use the unit only in the way described in this manual. Failure to follow the guidelines and instructions in this

manual may be dangerous and illegal.

General Safety Considerations

Your incubator and its recommended accessories have been designed and tested to meet strict safety requirements.
For continued safe operation of your incubator, always follow basic safety precautions including:
Read this entire manual before using the incubator.

Be sure you follow any city, county, or other ordinances in your area regarding the use of this unit.
Use only approved accessories. Do not modify system components. Any alterations or modifications to your incubator

may be dangerous and will void your warranty.
Always plug the unit’s power cord into a grounded electrical outlet that conforms to national and local electrical codes.

If the unit is not grounded, parts such as knobs and controls may conduct electricity and cause serious injury.
Do not connect the unit to a power source of any other voltage or frequency beyond the range stated on the data

plate at the rear of the unit.
Do not modify the power cord provided with the unit. If the plug does not fit an outlet, have a proper outlet installed by

a qualified electrician.
Avoid damaging the power cord. Do not bend it excessively, step on it, place heavy objects on it. A damaged cord

can easily become a shock or fire hazard. Never use a power cord after it has become damaged.

RECEIVING AND INSPECTION

Section

Your satisfaction and safety require a complete understanding of this unit,
including its proper function and operational characteristics. Read the instructions
thoroughly and be sure that all operators are given adequate training before
attempting to put the unit into service. NOTE: This equipment must be used only for
its intended application; any alterations or modifications will void your warranty.

1.1 Inspection: The carrier, when accepting shipment, also accepts the responsibility
for safe delivery and is liable for loss or damage claims. On delivery, inspect for
visible exterior damage, note and describe on the freight bill any damage found,
and enter your claim on the form supplied by the carrier.

1.2 Inspect for concealed loss or damage on the unit itself both interior and exterior. If
any, the carrier will arrange for official inspection to substantiate your claim.

1.3 Return Shipment: Save the shipping crate until you're sure all is well. If for any
reason you must return the unit, first contact your dealer for authorization and
supply nameplate data, including the serial number. For information on where to
contact Customer Service please see the manual cover.

1.4 Accessories: Make sure all of the equipment indicated on the packing slip is
included with the unit. Carefully check all packaging before discarding. All
models are equipped with 6 shelves, 24 shelf clips and 4 leveling feet.

INSTALLATION

Section

Local city, county or other ordinances may govern the use of this equipment. If you have any
questions about local requirements, please contact the appropriate local agency. Installation may
be performed by the end user. It is unnecessary for this unit to be installed by a technician.

Under normal circumstances this unit is intended for use inside, at room temperatures between
5°C and 30°C, at no greater than 75% relative humidity (at 25°C) and with a supply voltage that
does not vary by more than 10%. Customer Service should be contacted for operating conditions
outside of these limits.

3.1 Power Source: See the unit's serial data plate for voltage, cycle, wattage and ampere
requirements. If matched to your power source, plug the power cord into a grounded outlet.
VOLTAGE SHOULD NOT VARY MORE THAN 10% FROM THE SERIAL PLATE
RATING. These units are intended for 50/60 Hz application. A separate circuit is
recommended to preclude loss of product due to overloading or circuit failure. Note that
electrical supply to the unit must conform to all local and national electrical codes.

3.2 Location: In selecting a site, consider all conditions which may affect performance, such
as extreme heat from steam radiators, stoves, ovens, autoclaves, etc. Avoid direct sun, fast
moving air currents, heating/cooling ducts and high-traffic areas. To ensure air circulation
around the unit, allow a minimum of 5cm between the unit and any walls or partitions which
might obstruct free air flow.

Caution: Position and level the apparatus before connecting to water supply.

3.3 Lifting and Handling: These units are heavy and care should be taken to use appropriate

3.4 Leveling: The unit must sit level and solidly. Leveling feet (supplied) are to be installed at

3.5 Cleaning: The incubator was cleaned at the factory, but not sterilized. It should be

lifting devices that are sufficiently rated for these loads. Units should only be lifted from their
bottom surfaces. Doors, handles and knobs are not adequate for lifting or stabilization.
The unit should be completely restrained from tipping during lifting or transport. All moving
parts, such as shelves and trays should be removed and doors need to be positively locked
in the closed position during transfer to prevent shifting and damage.

the holes in the base of the unit. Turn them counterclockwise to raise level. If the unit must
be moved, turn the leveling feet in all the way to prevent damage.

disinfected prior to use. Remove all interior parts including shelves and shelf assembles.
Clean the chamber with a disinfectant that is appropriate to your application. Similar
periodic cleaning is strongly recommended. DO NOT USE chlorine-based bleaches or
abrasives as this will damage the stainless steel interior. DO NOT USE spray cleaners
that might leak through openings and cracks and get on electrical parts or that may contain
solvents that will harm the coatings. A similar periodic cleaning is recommended.

WARNING: Never clean the unit with alcohol or flammable cleaners with the unit
connected to the electrical supply. Always disconnect the unit form the electrical service
when cleaning and assure all volatile or flammable cleaners are evaporated and dry before
reattaching the unit to the power supply.

3.6 Humidification Water Supply: On the back of the body there is a 1/4" compression fitting
marked WATER IN. This fitting should only be plumbed to a DISTILLED WATER supply
source. Please note that when attaching the water supply line to the fitting on the unit, two
wrenches must be used: one to hold the fitting from turning in the panel, while using the
other to tighten the compression fitting. The supply source should be gravity fed or
pressure can be regulated to no more than 2 psi with a water pressure regulator valve.

Deionized or tap water should NOT be used. They will have a detrimental effect on
the unit causing corrosion or obstructions and premature failure of this assembly,
and VOID your warranty.

3.7 Fill the Vapor Generator: It takes approximately 880cc (0.88 Liter) to initially fill the vapor

generator, after that a continuous supply is required to maintain the operating level. If the
supply is disconnected or in some other manner cut off from the vapor generator, the level
will drop and the float switch in the vapor generator will shut the vapor generator off and the
low water indicator light on the front panel will be lit.

3.8 Water Drain Line: On the external back of the test chamber, at the bottom, there is a
copper drain line for excess condensation to drain from the bottom of the chamber. Ideally,
this line would be run into a floor drain, but could be run to a shallow pan with an automatic
sump pump. Under no circumstances should this line be plugged. If the line is plugged the
condensation will pool on the floor of the test chamber and flow out when the door is
opened.

3.9 Vapor Trap: Located in the water drain line, this trap consists of a solenoid valve
controlled by a timer. The timer is set to open and allow condensate to be removed from
the unit on a regular basis. This will prevent the chamber humidity and CO2 from escaping
and still allow any condensation to drain away.

3.10 Pressure Relief Valve: Marked RELIEF, this valve is located just to the right of the
WATER IN fitting at the back of the unit. It provides pressure relief for the vapor generator
system. The cracking pressure is 5. psi. The protective shipping cap must be removed
before operation as this valve should never be plugged or covered.

GRAPHIC SYMBOLS

Symbol

Identification

Indicates that you should consult your operator’s manual for further instructions.

Indique que l'opérateur doit consulter le manuel d'utilisation pour y trouver les instructions
complémentaires.

Indicates “Temperature”

Repère "température"

C

Indicates "Degrees Centigrade"

Repère "Degrés Centigrades"

Indicates "Relative Humidity"

Repère "Humidité Relative"

Indicates “Over Temperature Protection”

Signale un "dépassement de température"

Indicates “AC Power”

Repère "secteur AC"

I

Indicates the power is “ON”

Repère de la position "MARCHE" de l'interrupteur d'alimentation

O

Indicates the power is “OFF”

Repère de la position "ARRÊT" de l'interrupteur d'alimentation

Indicates “Protective Earthground”

Repère de la "terre de protection"

Indicates “Manually Adjustable”

Signale un élément "réglable manuellement"

Indicates “Potential Shock Hazard” behind partition

Signale un "risque potentiel d'électrocution" au-delà de la cloison.

Indicates “Unit should be recycled” (Not disposed of in land-fill)

Indique “l’appareil doit être recyclé“ (Ne pas jeter dans une décharge)

Section

RH

Your incubator has been provided with a display of graphic symbols which is designed to help in identifying
the use and function of the available user adjustable components.