79
GAS AUTO CHANGER (OPTION)
When an optional gas auto changer MCO-21GC is installed, there are two connecting ports for CO
2
gas
pipe, A and B. By connecting two CO
2
gas cylinders, this kit switches the CO
2
gas supply line when one of
the CO
2
gas cylinders becomes empty.
Connecting CO
2
gas cylinder
1.
Get two CO
2
gas cylinder ready (CO
2
gas cylinder A and B) and install an optional gas regulator
MCO-010R in both of CO
2
gas cylinders.
Note:
·
Use a liquefied CO
2
gas cylinder (at least 99.5 % pure). The siphon (dip tube) type cannot be used.
·
When MCO-010R is not available, install a gas regulator rated at 25 MPa(G) (250 kgf/cm
2
(G), 3600
psi(G)) for the primary side, and 0.25 MPa(G) (2.5 kgf/cm
2
(G), 36 psi(G)) for the secondary side.
2.
Using a gas tube that is provided, connect the
connecting port A for CO
2
gas pipe and the gas
regulator of the CO
2
gas cylinder A.
3.
Using a gas tube that is provided, connect the
connecting port B for CO
2
gas pipe and the gas
regulator of the CO
2
gas cylinder B.
Note:
If the CO
2
gas is supplied to multiple CO
2
incubators from a single gas cylinder, a CO
2
solid will be
formed in the gas regulator. The gas regulator safety valve will operate, and it may make an explosive
sound.
4.
After connecting the gas tube, make sure that no gas is leaking (ex. by using a gas leak detection
spray).
5.
Both CO
2
gas cylinder A and B, adjust the secondary side pressure of the gas regulator to
0.03MPa(G)~0.1 MPa(G) (0.3 kgf/cm
2
(G)~1 kgf/cm
2
(G), 4.4 psi(G)~14.5 psi(G)) while CO
2
gas is injecting.
Recommended pressure: 0.03 MPa (0.3 kgf/cm
2
(G), 4.4 psi(G)).
Note:
·
As the pressure increases, the CO
2
gas density control range will increase. Excessive pressure may
cause gas supply lines inside the incubator to come loose, which may result in gas poisoning or oxygen
deprivation due to the escaping of gas. If gas lines come loose, the incubator must be repaired.
·
Close the valve of the CO
2
gas cylinder when the CO
2
gas is not in use.
Connecting port A for CO
2
gas pipe
Lower right side
Connecting port B for CO
2
gas pipe
