On/Off Puss Button; Operation; Main Isolator; Turning On The Unit - Telemark Cryogenics 1200 Instruction Manual

Telemark Cryogenics Microprocessor Based Cryochillers
3.0.5 STOP/RESET Push Button.
Pulling on this button will turn the power on to the machine. The
green "STANDBY", "SCROLL" and the LCD Display will light up.
Pushing this will turn of the unit. The unit will automatically reset itself
after the STOP/REST button has been depressed and released. A
manual start or renewed remote start signal is required for restart.
3.1

Operation.

3.1.0 Turn on the main ISO isolator located to the right hand side of
the unit. Refer to Fig3
3.1.1 Turning the Unit On
Pull the black STOP/RESET button. SCROLL and STANDBY
lamps should illuminate.
Depressing the illuminated STANDBY button will start the
system. In the case of a Dual Circuit system both start buttons
will illuminate. The system will start and the display will read
"Pre-cool". For dual coil systems the left hand side STANDBY
button will need to be depressed to start the system
When the system is in the Pre-cool mode all other modes of
operation are disabled, until predefined conditions are met
none of the control buttons will illuminate in this state. At the
end of the pre-cool phase the STANDBY button will illuminate
to indicate the system is able to start cooling. At all times the
SCROLL button remains illuminated

3.1.2 Standby

Standby is the normal "resting state" both cool and defrost may
be selected when the standby light is illuminated, however
defrost will terminate instantly if the CO value is higher than
the defrost termination value.

3.1.3 Cool

Pressing the cool button activates the cool solenoid valve,
allowing refrigerant to flow around the cryo-coil. When the
system is in cool the button will remain illuminated.

3.1.4 Defrost

At any time defrost can be initiated by pressing the defrost
button. Following the initiation of defrost the cool solenoid
valve is closed and the defrost valve is opened an audible click
will be heard. When the system is in "defrost mode" the button
will remain illuminated.
During defrosting hot gas passes directly from the compressor
into the cryo-coil causing very rapid heating. The system
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Revision 1.0.7 October 2018