11
Field Installation Guidelines (Continued)
Plumbing the EWS
Inlet (Supply) Piping
– see Figure 11
Inlet pipe connections vary by EWS model size. Consult Figure 11 for inlet pipe size. Supply piping (installed and supplied by
others) to EWS inlet must be sized to provide sufficient flow rate and pressure. The minimum inlet pressure is 65 psi. Do not
exceed 120 psi inlet pressure. Schedule 80 PVC supply piping is preferred. Supply piping must not be copper.
Figure 11: Makeup Inlet Plumbing
Clean Outlet
The reduced conductivity (clean) outlet water flow from the EWS is plumbed to either the evaporative unit or the makeup tank.
Due to pressure drop across the EWS (up to 15 psi), some installations may require an inline booster pump (supplied by others)
to get the outlet water flow to the desired destination. A booster pump (supplied by others) is required when a makeup tank is
used to supply makeup to the evaporative unit(s). A totalizing water meter is factory installed prior to shipment.
Flush Outlet
Flush outlet shall be plumbed to a sanitary drain near the EWS. Refer to Figure 12 below for the outlet locations.
Figure 12: Outlet Plumbing (Plan View)
Inlet
Inlet Pipe Diameter
4-12 Cylinders: 1-1/2”
15-24 Cylinders: 2”
Water Meter
Clean Outlet to Unit
or Makeup Tank
Flush Outlet to
Sanitary Drain