PolyScience DuraChill 58 Series, Руководство пользователя

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Electrical Power
WARNING:
Do not plug unit into the electrical outlet until it is ready for startup.
Always connect the power cord on this unit to a grounded power outlet. Make certain that the outlet is the
same voltage and frequency as your unit (see identification label). Never operate the unit with a damaged
power cord.
Always turn the unit OFF and disconnect mains power before performing any maintenance or service as
hazardous voltages exist within chassis components.
WARNING: Make sure the equipment's main power switch is in the OFF position before connecting or
disconnecting electrical power from the unit. Follow all applicable electrical and safety codes and procedures
when connecting power to the unit. Electrical connections should be made by an authorized electrical
installer.
WARNING: DO NOT apply power until the unit is ready for Startup.
Connect the power cord (if) supplied with the Chiller to an appropriate electrical outlet.
Phase Requirements (if applicable)
For 3-phase units, be sure to connect in proper sequence, ie.: L1, L2, and L3. These Chillers are designed with a
junction box on the rear of the unit to which you can connect the electrical power supply conduit. Be sure to
provide suitable conduit strain relief and grounding.
3-phase units are equipped with a phase monitor that prevents startup if phase sequence is incorrect. The Chiller
will turn OFF in the event of a loss of one phase and/or prevent operation if there is a voltage mismatch between
any two phases greater than 8%.
Optional Signal Inputs/Outputs
Ambient / External Temperature Probe
Allows control of the cooling fluid temperature using an external temperature measurement (ambient
room/machine temperature or process temperature). A 9-pin connector is provided for connecting the
ambient/external tracking probe.
NOTE: In order for the Chiller to properly recognize the presence of the external temperature probe, the
probe must be connected to the unit before power is applied..
RS-232 / RS-485 Serial Output
Allows remote control the Chiller and/or the output of temperature readings to an external auxiliary device. The
maximum communications distance for Chillers equipped with the RS232 option is 50 feet (15 meters). The
maximum distance for units equipped with the RS485 option is 4000 feet (1200 meters). A 9-pin D-connector is
provided for this connection.
Remote On / Off Port
Allows the connection of a remote On/Off switch or other remote control device to the Chiller. A 15-pin D-
connector is provided on the rear of the instrument enclosure for this connection.
4-20mA Set Point Control
Allows set point changes using a customer supplied current value. A 15-pin D-connector or 8-pin circular
connector is provided for this connection.