Note: If the recirculation pump does not turn on (or that the flow switch is not satisfied) the compressors will not be allowed to turn on.
6.Check the pump(s) amp draws and pressures. The amp draws must be within the pump(s) running load and service factor amps.
7.Operate the chiller, looking for leaks and listening for unusual noises or vibrations that could indicate improper operation.
8.Check condenser fans for pressure switch settings as shown in the table below:
Fan |
| Set on |
|
| Set off |
| |
number | psi | kPa | bars | psi | kPa |
| bars |
1 |
| not applicable; Fan 1 | is a |
| |||
2 | 240 | 1,654.8 | 16.5 | 190 | 1,310.1 |
| 13.1 |
3 | 265 | 1,827.2 | 18.3 | 215 | 1,482.4 |
| 14.8 |
4 | 285 | 1,965.1 | 19.7 | 235 | 1,620.3 |
| 16.2 |
5 | 305 | 2,102.9 | 21.1 | 255 | 1,758.2 |
| 17.6 |
5-6 Determining Flow Rate
To determine flow:
1.Close the gauge cock leading to the pump suction side and open the gauge cock leading to the pump discharge.
2.Start the pump and make note of the discharge pressure in psi (kPa/bars).
3.Check the pump curve for the appropriate horsepower pump at the discharge pressure psi.
4.Project this point down to find the flow in gpm (lpm).
5.Process pumps can be left wide open if running amps are below full load amps.
5-7 Shutdown
1.Ready process and related equipment for shut down.
2.Turn off main power.
3.Close the water make up valve.
4.If the system is to be drained, open the 2” drain valve.
Page 38 of 86 | SSC Series Central Chilling Stations |
