Installation
6. Using two wrenches, connect the SUPPLY gas line to the SUPPLY coupling on the cold
head. Tighten the coupling to 47 ± 7 Nm (35 ± 5 ft. lbs.).
The system equalization pressure, shown by the compressor gauge after all components have
been connected, will determine if charging or venting is required. System equalization pressure
should equal the value provided in the system level manual or the Specification section of this
manual.
Install the Cold Head Cable(s)
1. Ensure the compressor’s circuit breaker is in the OFF position (handle down).
2. Connect the applicable cold head cable to the cold head receptacle on a compressor front
panel.
3. Connect the other end of the cold head cable to the electrical receptacle on the cold head.
Remote On/Off Cable (Optional Accessory)
A remote on/off cable can be furnished as an accessory. See the Parts section for part number
and ordering.
1. Disconnect the power to the compressor.
2. Remove the heat shrink cap from one end of the remote on/off cable. Connect the cable to
customer’s remote switch. Use the green conductor to ground the switch box. Switch
voltage will be the same as the customer’s power source, single phase. See Figure 9,
Electrical Schematic Diagram.
3. Connect the other end of the cable to the accessory receptacle on the compressor.
4. Reconnect the compressor to its power source.
The system can now be operated from the compressor or from customer’s remote switch.
When using the customer’s remote on/off switch, the power switch on the compressor must
be in the stop (off) position.
5. To verify that the cable installation is correct, close customer’s remote switch. Run the
system for one minute, then stop.
NOTE
When customer’s remote switch starts the compressor, it cannot be stopped by
the compressor’s power switch. Open the compressor’s circuit breaker to stop it
locally. When the compressor is started at the compressor power switch, it
cannot be stopped at the remote on/off switch.
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