Shutdown; When Suspending For Long Time (For 1 To 2 Weeks) And; Resuming Emp-14W - Ulvac EMP-14W Instruction Manual

Liquid nitrogen generator

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8.2.2 Start-up

(1) When nitrogen gas is supplied to EMP-14W, the RUN/STOP button lights in green and

SW115 starts to produce liquid nitrogen.

If production does not start and the COMP.AL. illuminates, the power supply may be

connected in reverse phase. In such a case, turn OFF the breakers of main power source

and the electric circuit of EMP-14W, alternate two cables out of three on the main power

source, and turn on the power again.

(2) Since inside of liquid nitrogen dewar is at room temperature at the initial start-up, it is

necessary to take the time to cool inside of the dewar. (It normally requires about half

a day.) As the temperature inside the dewar goes down, accumulation of LN

The production continues until LN

production starts when the amount of remaining LN

when it reaches to 40L (100%). This cycle goes on repeatedly.

8.3

Shutdown

When the EMP-14W is turned OFF with the RUN/STOP button, the RUN/STOP light

flashes with shorter light on and longer off, and RUN/STOP button lights off and all

the operations stop.

8.4

When suspending for long time (for 1 to 2 weeks) and resuming EMP-14W

When the system is suspended operation for a long time, liquid nitrogen in the dewar will

be replaced by the air. If the device is resumed in such a condition, the liquefaction

efficiency deteriorates due to the moisture in the air. Follow the procedure below when

resuming.

(For GN-10i)

(1) Take the remote cable off from GN-10i before you press the RUN/STOP switch of

EMP-14W and open the front panel of GN-10i.

(2) Turn the REMOTE/LOCAL switch to "LOCAL".

(3) Press the button on the front side of GN-10i to startup and keep supplying nitrogen to

EMP-14W for at least one hour.

(4) Stop GN-10i, turn the REMOTE/LOCAL switch to "REMOTE", and connect the

remote cables for nitrogen generators.

(5) Press RUN/STOP button of EMP-14W to reboot the entire system.

in the dewar reaches 40L (100%). After that,

CAUTION

ULVAC CRYOGENICS INCORPORATED

is below 30L (75%), and stops

starts.

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