Indicator | Name | Description |
|
|
|
| Low Water | The Low Water Flow/Pressure light comes on when |
| Flow/Pressure | the flow switch (pressure switch on 2 & 3 hp |
| Light | models) senses that the water/glycol flow rate |
|
| through the evaporator has dropped below an |
|
| acceptable level. The flow switch opens shutting |
|
| down the pump(s) and the chiller. |
|
|
|
| Low Refrigerant | The Low Refrigerant Pressure light come on if the |
| Pressure Light | compressor suction pressure drops below the limit |
|
| of the low pressure cutout switch. The compressor |
|
| shuts off, but the pump(s) continues to run. |
|
| The indicator turns off and compressor restarts |
|
| automatically when the refrigerant pressure rises to |
|
| the limit of the |
|
| qualified refrigeration service technician or contact |
|
| the Service Department. |
|
|
|
| Low Oil Pressure | The Low Oil Pressure light is installed on chillers |
| Light | with a |
|
| pump. A differential pressure switch monitors the |
|
| difference between crankcase pressure and oil pump |
|
| pressure. |
|
| If the pressure drops to an unsafe level for more |
|
| than two minutes the switch will open the control |
|
| wiring circuit, shutting off the compressor, turning |
|
| the light on, but allowing the pump(s) to continue |
|
| running. This is a manual reset switch. Call a |
|
| qualified refrigeration service technician or the |
|
| Service Department. |
|
|
|
| Control Power | The green, lighted, |
| Lighted Switch | Switch lights whenever the switch is in the ON |
|
| position and the control circuit is energized. |
|
|
|
| Alarm Silence | The red |
| Switch | used to turn off the audible alarm on chillers that are |
|
| built with the audible or audible/visual alarm option. |
|
| This switch is always provided and requires no |
|
| additional wiring if either alarm option is installed at |
|
| a later time. |
|
|
|
Chapter 4: Operation | 33 of 78 |