Sentinel CO2-EXP User manual

Specifications
Compressed CO2 connection CGA-320
Maximum inlet pressure 3000 PSI
Weight 4 lbs
Life Expectancy > 10 years
Sentinel products are distributed by:
GPS / Global Product Solutions LLC.
www.growgps.com
Sentinel CO2 Regulators
offer a 3-year warranty.
Ask your retailer for
details.
Instruction Manual
CO2-EXP
CO2Expansion Regulator

Carbon Dioxide / CO2 is critical for all plants. Normal atmospheric
air around the world averages about 380 Parts-Per-Million (PPM.)
When plants are provided higher levels of carbon dioxide, they can
grow faster and larger. It is normally agreed by experts that up to
1500 PPM is beneficial to plants. Compressed CO2 comes in
pressurized tanks or cylinders.
The CO2-EXP works with the CO2-REG. When used together,
more than 1 tank can be coupled together to extend the time
between tank changes,
The CO2-EXP CO2 expansion regulator assembly comes
ready to install. Connect it to the CO2-REG, connect your second
tank and you are ready to go.
1) The CO2-EXP expansion Regulator connects to a second 20 lb
or 50 lb CO2 tank.
2) It is then joined together with the CO2-REG.
3) The precision flow-gauge on the CO2-REG then releases
between 1/2 and 15 SCFH of CO2 per hour (Standard Cubic
Feet per Hour) from BOTH connected tanks.
TABLE OF CONTENTS
A quick look at the CO2-EXP
Installation of the CO2-EXP
Determining area and settings
Installing CO2-EXP Expansion Regulator
Specifications
Introduction Determining area and settings
It is highly recommended to use a CO2 Part Per Million (PPM)
controller with the CO2-REG. If you are not going to use a
controller, the CO2-REG must be used with a timer to regulate how
often and how much CO2 is released into the area.
The chart below is for reference only. In order to determine the
proper timer settings and flow-gauge settings, you can find a calcula-
tion tool online at www.growgps.com
LENGTH A 10.0 Enter the enclosed area
length
WIDTH (FT) B 12.0 Enter the enclosed area
width
HEIGHT (FT) C 8.0 Enter the enclosed area
height
ROOM CAPACITY
(CU FT)
D 960 Multiply
A x B x C
This is the total area of
the enclosed growing
zone.
EXISTING CO2
LEVEL (PPM)
E 375 Enter the average
background CO2 level.
DESIRED CO2
LEVEL (PPM)
F 1500 Enter the desired PPM
level you want to have
SUPPLEMENT CO2
LEVEL (PPM)
G 1125 Subtract
E from F
This is the amount of
CO2 to be added PPM
VOLUME OF CO2
REQUIRED (CU FT)
H 1.080 (Multiply G
x .000001) x D
Amount of CO2 to
bring the area to the
desired PPM.
INJECT PERIOD
(MIN)
I 10.0 The amount time the
CO2 will be released.
FLOW RATE (CFM)
(For CFH, see below)
J 0.108 Divide H by I Set the flow-gauge to
this setting.
FLOW RATE (CFH)
(For CFM, see above)
K 6.5 Multiply J x 60 Set the flow-gauge to
this setting.
WARNING: Compressed CO2 tanks have pressures as high as 3000PSI. Do
not drop or store tanks where they may fall. Damage to the regulator assembly
could result in high-pressure gas released with enormous energy.

The CO2-EXP Expansion regulator
allows multiple compressed tanks to
be connected together. That allows an
extended amount of time between
tank changes. The CO2-EXP consists
of a separate regulator to reduce the
pressure from 3000PSI down to 30
PSI.
A 1/4” flexible line connects from
the CO2-EXP to the back of the CO2-REG. Each tank has it’s own
regulator and gauge. To install the CO2-EXP, follow the steps
below.
1) Turn OFF the compressed CO2 tanks to be used.
2) Locate the pipe-cap on the back of the CO2-REG between the
regulator body and the flow-gauge. Loosen and remove the cap.
3) Connect the flexible hose from the CO2-EXP to the open
connector on the back of the CO2-REG. Tighten securely.
4) Secure the CO2-REG and CO2-EXP to the compressed CO2
tanks.
5) Open the access valves on the compressed tanks and check for
leaks.
6) Activate the solenoid by plugging the 120-volt cable into a
power source. Verify the flow-gauge is set correctly.
Each tank will provide CO2 to the flow-gauge. If one tank runs
empty before the other one, the second tank will continue to
provide CO2.
Installing CO2-EXP (Expansion Regulator)
CO2-
REG
CO2-
EXP
Using the CO2-REG and
the CO2-EXP together
allows multiple tanks to
be connected and
controlled by a single
flow-gauge.
CO2 released from
both tanks
A quick look at the CO2-EXP…
NOTE: CO2 tanks / cylinders are under extremely high pressures
and frostbite can occur if exposed to escaping CO2 gas. Always use
caution while handling pressurized gas.
The tank pressure gauge on the CO2-REG and the CO2-EXP is
simple to read and understand.
Red area of gauge
means the tank is
dangerously low.
Yellow area of gauge
indicates the tank is
about 1/2 full.
Green area of gauge
indicates the tank is
full to 1/2 full.
Connection to CO2-REG
low-pressure (30 psi)
Pressure gauge
reads remaining
tank pressure
Separate regulator
safely controls high
pressure.