Final Preparation Of Compressor; Connecting The Compressor To The Cold Head; Table 3-1: Voltage Specifications - HELIX 8200 Operating And Service Instructions

8200 Compressor

Final Preparation of Compressor

Connecting the Compressor to the Cold Head

P/N 8040353
1. Using a voltmeter, measure the phase-to-phase voltage from the
power source. Compare this voltage to the following table and
position the voltage range selector switch to the "208V" or
"220V" position as required. Also, set the frequency selector
switch to the 50 Hz or 60 Hz position, as appropriate. See
Figure 1-2 for location of selector switches.

Table 3-1: Voltage Specifications

Operating Voltage Range
60 Hz
198-212 180-212
213-250 213-220
2. Ensure that water is turned on for the water-cooled compressor.
3. Set the compressor ON/OFF switch (3) to OFF. Connect the input-
power cable to the power source Refer to Table 1-1, for electrical
power requirements.
4. Turn the compressor switch to the ON position and allow the com-
pressor to run for 15 minutes to stabilize the oil circuit. Make sure
that the compressor fan operates freely in the air-cooled compres-
sor.
5. Switch off the compressor and disconnect the input-power cable.
6. Install the compressor in its permanent location on a level surface.
Air cooled units must have a minimum clearance of 12 inches at the
front and back for adequate airflow.
Make the connections between the cryopump and compressor. See Figure
3-5.
1. Remove dust plugs and caps from the supply fittings and return
lines, compressor, and cold head. Check all fittings.
2. Connect the helium-gas return line from the gas-return connector
on the rear of the compressor to the gas-return connector on the
cold head.
Voltage
Adjustment Switch
50 Hz S1 Position
-
C TI CRYOGENICS
HELIX TECHNOLOGY CORPORATION
208V
220V
3-7