8
Design Considerations (Continued)
Makeup Water Tank
As determined by system design, the EWS supplies reduced conductivity water to a makeup water tank. A booster pump
(supplied and field installed by others) supplies water from the makeup tank to the evaporative cooling unit(s). Makeup tanks are
sized by evaporative unit demand and supplied by EVAPCO. An 850-gallon tank is shown in Figure 8. All makeup tanks
supplied with the Water Saver(s) have the following connections:
x
2” FPT connection at bottom of tank to connect makeup line to evaporative unit
x
3” self-aligning connection on top of tank for custom 5 probe EWLC
Clearance above the top of the tank is required for placement of EWLC probes (refer to Table 2 for standard tank sizes). EWS
inlet water should be directed downwards, away from the EWLC probes. Depending upon the height of the mechanical room, the
5-probe EWLC may need to be installed prior to moving the tank into the building. Tank overflow piping is recommended.
Installation and parts for overflow piping is supplied by others.
Make-up Tank
(gallons)
Tank Clearance
(Minimum)
300
79”
500
68”
750
98”
850
112”
1500
110”
2000
120”
2500
82”
Table 2: Minimum Clearance Over Makeup Tank
Figure 8: Makeup Tank 850-gal Capacity
