110-240 9
Optional Signal Inputs/Outputs
External Ambient Tracking Temperature Probe
This option allows you to control the cooling fluid temperature using an external temperature measurement
(ambient room/machine temperature or process temperature). A 9-pin connector is provided on either the
underside of the local control panel or on the rear panel for connecting the external 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.
RS232 / RS-485 Serial Output
This option allows you to remotely control the Chiller and/or output temperature readings to an external recorder
or other 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 on the rear of the instrument enclosure for this connection.
Remote I/O Port
This option allows you to use an external 12 VDC signal or a dry contact closure to turn the Chiller on and off.
Chiller status is also available from this port. A 15-pin D-connector is provided on the rear of the instrument
enclosure for this connection. See schematic at the end of this manual.
Plumbing
Process Piping
The Chiller has two internally threaded (1/2 inch ID NPT) fittings on the rear of the instrument housing for the
process water connections. Two sets of adapters (1/2 inch ID and 5/8 inch ID) are supplied with the unit for
connecting these fittings to the process piping.
To maintain a safe workplace and avoid leaks, special care should be taken when choosing hoses and
connectors for the Chiller. It is the user’s responsibility to ensure that the tubing and fittings connected to the
Chiller are compatible with the fluid, temperature, and pressure being used.
Pressure Ratings — Hoses should be able to withstand the largest pressure that they will encounter.
For “P” Series (positive displacement pump) and “T” Series (turbine pump) Chillers, this is 100 psi (689 kPa).
Flexible Tubing — Avoid tubing that will expand and take up fluid volume when operating at the desired
pressure.
Hose Diameter — Process piping/hosing with a diameter smaller than ½ inch ID can be used if desired.
However, keep in mind that using smaller diameter hosing increases pressure in the circulating system.
Couplings and Clamps — The use of screw-tightened hose clamps is necessary on all joints to insure good,
tight connections. Quick connectors are not recommended as they have the potential for restricting flow rate.
Reservoir Drain
A ½ inch NPT connection is provided for the reservoir’s gravity drain. It should be piped to a drain or receptacle
positioned below the bottom of the reservoir. If a receptacle is used, be sure it is of sufficient volume to hold all
the water in the reservoir, process, and process lines.
External Water Filter
An optional water filter is available that can be connected to the Chiller’s fluid inlet or fluid outlet. Consult supplier
for additional information.
To Next Page
Loading...
