Chiller Operation, Process Liquid Flow

Chiller Operation

WARNING: NEVER OPERATE THE CHILLER WITH THE PANELS REMOVED.

ALWAYS USE THE POWER SWITCH TO TURN OFF THE CHILLER WHEN IT IS NOT BEING

USED.

ALWAYS ENSURE THAT ALL AIR INLETS AND OUTLETS ARE FREE FROM OBSTRUCTION. BE SURE THAT THE RESERVOIR IS FILLED WITH FLUID PRIOR TO POWERING UP THE UNIT.

Process Liquid Flow

After ensuring that the system piping is free from obstruction, that all valves are open, and the reservoir is full, push the CONTROL POWER switch to the ”ON”position. The pump should now be operating.

On three phase units such as the CH1502 and CH1503, it is important to check the pump rotation. Remove the left side panel, push the POWER button in, and observe the motor shaft. Make sure that the shaft is rotating in the direction of the arrow indicated on the pump housing. If the rotation is incorrect, reverse two of the three in- coming power supply leads at the terminal strip.

NOTE: Running the pump in reverse for too long will result in permanent pump damage. The Phase Protection/3--Phase Monitor Option will prevent the pump from operating backwards. See the full de- scription of the option for complete explanation.

All Chillers with pumps are supplied with a pressure regulating valve on the pump discharge. This valve is pre- set at the factory to ensure that system pressure does not exceed the capabilities of the pump motor and/or pip- ing. If this valve requires adjustment, please contact the REMCOR Service Group for the proper setting procedure and pressures.

Once the flow has been established the thermostat can be programmed to the desired set--point.

Phase Protection / 3--Phase Monitor Option

The 3--Phase Monitor detects phase loss, low voltage, and phase reversal by continuously monitoring the

3--Phase power lines for abnormal conditions. When correct voltage and phase rotation are applied, the internal relay will energize. A fault condition will de--energize the relay. When the fault is corrected, the monitor will auto- matically reset. Both Trip and Norm condition indicators are provided on the relay to aid in adjustment and sys- tem trouble--shooting.

This control is located in the enclosure labeled “Monitor”on top of the electrical box.

Phase Protection / 3--Phase Option Adjustment

The following procedure will allow the 3--Phase Monitor to achieve a trip point just below the nominal phase-to- phase voltage, where the unit is applied.

Rotate the adjustment control fully clockwise, or until the red (Trip) indicator illuminated. Slowly rotate the adjustment control in a counter-clockwise direction, just until the green (Norm) indicator illuminates. At this point, the 3--Phase Monitor is the most sensitive to irregular power line conditions. If nuisance tripping occurs, turn the control slightly further counter--clockwise.

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