Cornelius CH3000 Installation Manual download pdf (Page 14)

CH3000 Chiller Operator’s & Installation Manual

SERVICE

One servicing this chiller, it is important to note the information contained on the data plate located in the upper rear of

the unit

If technical assistance as needed, the phone technician will need the model and serial number of your chiller. That

information is found on the data plate.

The model and serial number also needed one order replacement parts.

Figure 7. Sample Data Plate

SAFETY CONTROLS

Each chiller is provided with three standard safety controls. These controls are arranged in series in the control circuit

to automatically shut down the unit in the event that a condition exists which could be harmful to the refrigeration

system components. This section includes a brief description of each control and it’s location. Some troubleshooting

hints are also included.

Hi Pressure Control (HPC)

This control prevents system operation in the event that the high at side pressure exceeds 250 PSIG. If this occurs,

check the following:

1. That the condenser and condenser air filter clean and that the air inlets and outlets are unobstructed.

2. That the ambient temperature at the chiller location is below 110° F.

3. That the fan blade is rotating.

Press the reset button located on the front of the Hi Pressure Control to restart the chiller. This control is located in the

upper left-hand corner of the electrical box. If the control opens again, check the control setting with refrigeration

gauges. If the setting is correct, contact the technical service department.

Low Temperature Control (LTC)

This control present system operation in the event that the fluid inside the evaporator falls below 35° F. If this occurs,

check the following:

1. That the thermostat setpoint is set at 40° F or greater.

2. That the flow through the system is greater than 2 gallons per minute.

This control is mounted in the lower left-hand corner of the electrical box. It automatically resets itself once the water

temperature is restored to 38° F. The low temperature control may be adjusted for lower temperatures if a glycol

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Cornelius CH3000 Installation Manual Page 14