CO2 TANK SWITCH
MODEL : 2002-S/2002-S2/2002-S2E
INSTALLATION AND INSTRUCTION MANUAL
Sheldon Manufacturing Inc. P.O. Box 627 Cornelius, Oregon 97113
EMAIL: tech@Shellab.com INTERNET: http://www.Shellab.com/~Shellab
1-800-322-4897 (503) 640-3000 FAX (503) 640-1366
Revised 11/2013
4861622
TABLE OF CONTENTS
SECTION 1.0
INSTALLATION AND OPERATING INSTRUCTIONS
SECTION 2.0
PARTS LIST AND WIRING DIAGRAM
These units are 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 are not
intended for hazardous or household locations or use.
INSTALLATION AND OPERATING INSTRUCTIONS
Section
Attach tubing from the gas tank regulators to the fittings marked GAS LINE IN on the rear
panel of the TANK SWITCH. Attach a length of tubing from the fitting marked GAS LINE
OUT to incubator.
OPERATING INSTRUCTIONS
Set regulators to proper operating pressures. Both regulators should be set to 15 psi. It
does not matter which tank is attached to which input fitting. When one tank is empty, the
gas line will change to the other tank automatically. At this time the empty tank can be
replaced. Note: there are no alarms to indicate when the tanks are empty so tank pressure
should be checked on a regular basis to ensure that both tanks do not run empty. When an
empty tank is replaced, simply set the regulator on the partial tank to a value of 15 psi but
never more than 20 psi.
Replacing a tank:
1. Remove regulator from empty tank.
2. Attach regulator to new tank and decrease pressure to 15 psi.
This process will allow you to always keep your FULL tank on stand-by.
It is highly recommended that a good quality 0-60 PSI output range DUAL STAGE
pressure regulator be used on the CO2 tank. The dual stage regulator will have two
pressure gauges. The high pressure gauge (0-4000 PSI) will indicate the pressure within
the tank. The low pressure gauge (0-60 PSI) will indicate the output pressure on the supply
hose to the incubator. Do not use single stage regulators. They will not supply a stable
pressure. Just because a regulator has two gauges does not mean that it is a dual stage
regulator. Ensure that you are using a dual stage regulator.
It is normal for the high pressure gauge on your regulator to start out reading 800 to 1000
PSI with a full tank. The reading will drop to 500 to 800 PSI quickly and will stay there for
most of the duration of the tank. At the end of use the pressure will drop quickly to zero to
indicate that the tank is completely empty. Pure CO2 is in a liquid state in the tank, and a
constant vapor pressure is generated in the tank above the liquid level. The CO2 is drawn
off of the top as a gas. The same vapor pressure is maintained as long as any liquid is left
in the tank. When the last of the liquid has evaporated into gas then the pressure will drop
rapidly as the gas is drawn off.
Only medical grade CO2 should be used in your incubator. The use of
any lesser grade may damage your incubator and void your warranty.
PARTS LIST
Description
115V
220V
Audio Alarm
0250501
0250501
Fuse 5 AMP MDA
3300500
3300500
Latching Relay
7030535
7030535
Momentary Switch
7850561
7850561
On/Off Switch
7850560
7860560
Power Cord, USA
1800529
1800537
Pressure Switch
7850574
7850574
Solenoid Valve
86005276
8600526
Tank Indicator Pilot Light
4650553
4650553
Transformer 220V to 115V
N/A
8350518
Section
2
WIRE DIAGRAM
SHELDON MANUFACTURING, INC.
LIMITED WARRANTY
(Parts only, exclusive of labor)
Sheldon Manufacturing, Inc., (“Manufacturer”) warrants for the original user of this
product that all parts, not including finished goods products, it manufactures or
resells will be free from defects in material and workmanship for a period of one
year from the date of delivery of this product to the original user (the “Warranty
Period”). During the Warranty Period, Manufacturer, at its election and expense,
will repair or replace parts that are proven to Manufacturer’s satisfaction to be
defective, or, at Manufacturer’s option, refund the price or credit the price of any
parts that are proven to Manufacturer’s satisfaction to be defective. This warranty
does not cover any labor or damage due to accident, misuse, negligence, or
abnormal use. Use of parts in a system that includes components not
manufactured by Manufacturer is not covered by this warranty. Any alteration or
removal of the serial number on Manufacturer’s parts will void this warranty. Under
no circumstances will Manufacturer be liable for indirect, incidental,
consequential, or special damages. The terms of this warranty are governed by
the laws of the state of Oregon without regards to the principles of conflicts of laws
thereof. If any provision of this limited warranty is held to be unenforceable by any
court of competent jurisdiction, the remainder of this limited warranty will remain in
full force and effect.
This warranty is in lieu of and excludes all other warranties or obligations,
either express or implied. Manufacturer expressly disclaims all implied
warranties, including without limitation, the warranties of merchantability and
fitness for a particular purpose.
For fast and efficient support, please have the following information available
anytime you request service:
Model __________
Serial No. __________
Part No. __________
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