Planer Kryo360-1.7, Operator'S Manual

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19 Installing the system
2.1.3 Fitting the pump
Warning
Wear protective clothing, including cryogloves, goggles, boots and a protective apron.
Ensure that the red pressure relief valve on the pump is open.
Ensure that power is disconnected from the chamber and the pump.
Ensure the delivery hose from the pump to the chamber is securely tightened.
1. Make sure that the delivery hose is as straight as possible, with no major high or low spots.
Warning
Do not insert the pump rapidly as the liquid nitrogen may bubble violently.
2. In one smooth and continuous action, insert the pump evenly into the neck of the dewar until the
microswitch plunger operates on the neck ring. It is normal for nitrogen gas to issue from the
pressure-relief valve.
3. Press firmly on the top of the pump to hold it level and clip all the springs onto the dewar,
alternating between handles.
4. Close the pressure-relief valve.
Warning
The mains power outlet on the rear of the Chamber must only be used for connection to a Planer
pump.
5. Connect the mains inlet of the pump power supply unit to the auxiliary power output on the rear
of the Chamber.
Warning
Always test the dewar after refitting the pump.
2.1.4 Testing the dewar
Warning
Wear protective clothing, including cryogloves, goggles, boots and a protective apron.
1. Connect the mains lead from the Chamber to a appropriate wall socket.
2. Switch on the system.
3. Press the switch on the pump power supply unit. The adjacent light will illuminate. After about 5