þComplete all piping leading to and from the pump tank. Observe all applicable codes.
þComplete all electrical wiring. Observe all applicable codes.
þPrepare all related equipment in the system for operation.
Note:
∙Never switch contactor leads or motor leads for reversing rotation.
∙Do not use contactor or motor leads for phase matching.
∙Compressor noise from reverse rotation is noticeable. Do not run in this mode for more than ten (10) seconds. The compressor shuts off if run longer in this mode.
∙Reverse rotation can cause suction and discharge pressures to be approximately equal; amp draws are lower than normal.
∙If you discover that compressor rotation is reversed, correct it by switching any two main power leads into the disconnect switch or distribution block on the unit.
þOpen the 1” (approx. 25 mm) makeup water valve and allow the tank to fill until the automatic float valve shuts off. The float level should be adjusted so the standing water level is 8” (20 cm) from the top of the tank.
þCheck for proper pump rotation direction. To confirm proper rotation:
1.Observe a pump pressure gauge connected to the suction and discharge sides of the pump casing through two ¼” (approx. 6.4 mm) gauge cocks.
2.Close the gauge cock leading to the pump suction and open the gauge cock leading to the pump discharge.
3.Close the discharge butterfly valve, crack it open, then start the pump and observe the gauge.
∙If the gauge indicates within 15 psi (103.4 kPa/1.03 bars) below the pump curve, pump rotation is correct. Pump rotation is clockwise opposite the shaft end.
∙If the gauge indicates 20 psi (137.9 kPa/1.38 bars) or more below the pump curve, the pump is running backwards. Reverse rotation by interchanging any two power mains to the pump motor or starter.
∙Recheck the pressure to be sure it increased.
Page 34 of 86 | SSC Series Central Chilling Stations |
