11. If any stagnant water remains in the system including “dead legs” in the piping, the unit must be disinfected prior to the fans
being energized. Please refer to ASHRAE Guideline 12-2000 and CTI Guideline WTP-148 for more information and consult
local legislation prior to start-up.
12. Fill the cold water basin manually up to the overflow connection.
13. For closed circuit coolers only, fill the heat exchanger coil with the specified fluid and vent air from the system before
pressurizing, using vents on coil inlets.
14. All new evaporative cooling equipment and associated piping should be pre-cleaned and flushed to remove grease, oil, dirt,
debris and other suspended solids prior to operation. Any pre-cleaning chemistry should be compatible with the cooling
equipment’s materials of construction. Alkaline formulations should be avoided for systems which include galvanized materials
of construction.
15. Closed hydronic systems connected to either a closed-circuit cooler or dry cooler should be pre-cleaned and flushed to
remove debris, grease, flash rust, oil, and other suspended solids prior to operation. Evapco recommends the use of inhibitor
chemistry or inhibited glycol to minimize corrosion and scale during normal operation.
For eco-WE & eco-W with optional controls, see controls O&M for proper start up procedure.
After the unit has been energized, check the following:
1. Adjust mechanical float valve as required to the proper water level.
2. Unit basin should be filled to the proper operating level. See “Recirculating Water System Operating Levels” section for more
details.
3. Verify fan is rotating in proper direction.
4. Start the spray water pump and check for proper rotation as indicated by the arrow on the front cover.
5. Measure voltage and current on all three power leads of pump and fan motor. The current should not exceed the motor
nameplate full load amp rating taking the service factor into account.
6. Adjust bleed valve to proper flow rate. Consult your qualified water treatment person to fine tune the minimum bleed
necessary.
7. See fan and pump motor manufacturer maintenance and long term storage instructions for more detailed information. The
motors should be lubricated and serviced in accordance with manufacturers instructions.
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