12
Field Installation Guidelines (Continued)
EWS Bypass Loop
The bypass engages when the water reaches the “By-Pass On” probe of the EWLC. The EWS system is designed to continue
to operate even if bypass is engaged. Maintaining inlet water pressure and flow during bypass is important.
Install bypass piping around the EWS (piping and valve by others) using the following recommendations.
x
The bypass line shall be separate to the makeup line going to the EWS and the EWS clean outlet line
x
Bypass piping diameter shall be equal to or smaller than Inlet (Supply) piping diameter
x
In most applications, the recommended cycle time for the bypass valve is 15-25 seconds (line size and pressure may affect
recommended cycle time)
x
On the outlet side, the bypass line must run all the way to the tower for configurations without a makeup tank
See Figure 5-Figure 7 for examples of typical bypass piping configurations. Wire the bypass valve to the 5 probe EWLC as
shown in Figure 14. Bypass operation is controlled by EWLC.
Wiring Power to the Control Panel
The EWS has the following electrical options:
1. 230V, 3 phase, 3 wire (delta)
2. 480V, 3 phase, 4 wire (wye)
Refer to Figure 13A - C for supply voltage connections.
Figure 13A: Supply Voltage 230V, delta
Figure 13B: Supply Voltage 480V, wye
Figure 13C: Neutral 480V, wye
Ground
L1 L2 L3
Ground
Neutral
L1
L2 L3
