21
INSTALLATION
Note:
Before connecting N
2
gas cylinders (or O
2
gas cylinders), read the precautions for safe operation on
pages 5–9.
Connecting N
2
/O
2
gas cylinders
Depending on the setting of O
2
density, the N
2
or O
2
gas cylinder should be selected. The selection is as
follows:
When the setting of O
2
density is 18 % or less:
N
2
gas
When the setting of O
2
density is 22 % or more:
O
2
gas
O
2
density in the atmosphere is about 20 %. For the control of O
2
density in the chamber, O
2
gas is diluted
by N
2
gas when the setting of O
2
density is less than that of the atmosphere. On the contrary, O
2
gas is
added when the setting of O
2
density is more than that of the atmosphere.
1.
Prepare two N
2
gas cylinders (or two O
2
gas cylinders) and attach optional gas regulators MCO-010R to
each cylinder.
Note:
When MCO-010R is not available, attach a gas regulator rated at 25 MPa(G) (250 kgf/cm
2
(G), 3,600
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.
Connect the connecting port A for the N
2
/O
2
gas pipe and the gas regulator of the N
2
gas cylinder A (or
the O
2
gas cylinder A) using the included gas tube.
3.
Using the gas tube provided, connect the connecting port B for the N
2
/O
2
gas pipe and the gas regulator
of the N
2
gas cylinder B (or the O
2
gas cylinder B)
.
Notes:
• The type of gas from the two gas cylinders must be the same one. It is not possible to use an N
2
gas
cylinder and an O
2
gas cylinder simultaneously.
• For connecting/removing the tube and for connecting to the gas regulator MCO-010R, refer to pages
19
–
20.
4.
After connecting the gas tube, make sure that no gas is leaking (ex. by using a gas leak detector spray).
5.
Set the N
2
gas (or the O
2
gas) on the secondary side to 0.05 MPa(G)–0.1 MPa(G) (0.5 kgf/cm
2
(G)–
1 kgf/cm
2
(G), 7.3 psi(G)–14.5 psi(G)) for gas injection.
Recommended pressure: 0.05 MPa(G) (0.5 kgf/cm
2
(G), 7.3 psi(G)).
Note:
Do not set the pressure on the secondary side too high. As the pressure increases, the O
2
gas
density will vary widely. Excessive pressure may cause gas supply lines inside the incubator to come loose,
which may result in fire or oxygen deprivation due to leaking gas. If gas lines come loose, the incubator
must be repaired.
6.
When there is no N
2
gas (O
2
gas) left, the incubator automatically switches the empty N
2
gas (O
2
gas)
supply line to the other.
Note:
The gas lines connected to the incubator will degrade over time. If any deterioration or abnormalities
are found during inspection, replace the lines immediately.
Lower right side
Connecting port for GAS tube
Enlarged illustration of the port (tube fitting)
Connecting port B for N
2
/O
2
gas pipe
Connecting port A for N
2
/O
2
gas pipe
Pull
Release ring
Push
