Operation and Maintenance Instructions
International Building Code Provisions
The International Building Code (IBC) is a comprehensive set of regulations addressing the structural design and installation
requirements for building systems – including HVAC and industrial refrigeration equipment . The code provisions require that
evaporative cooling equipment and all other components permanently installed on a structure must meet the same seismic design
criteria as the building .
All items attached to the Evapco Closed Circuit Coolers or Evaporative Condensers must be independently reviewed and isolated
to meet applicable wind and seismic loads . This includes piping, ductwork, conduit, and electrical connections . These items
must be flexibly attached to the Evapco unit so as not to transmit additional loads to the equipment as a result of seismic or wind
forces .
Initial and Seasonal Start-Up Checklist
General
1. Verify that the overall installation reflects the requirements of the installation guidelines found in EVAPCO Bulletin 311 –
Equipment Layout Manual, available at www .evapco .eu .
2 . For multi-speed fan motors, verify that 30 second or greater time delays are provided for speed changes when switching from
high to low speed . Also check to see if interlocks are provided to prevent simultaneously energizing high and low speed, and
confirm both speeds operate in the same direction .
3 . Verify all safety interlocks work properly .
4 . For units operating with a variable frequency drive, make certain that minimum speed requirements have been set . Check with
VFD manufacturer for recommended minimum speeds and for recommendations on locking out resonance frequencies .
See "Fan System Capacity Control" section for more information .
5 . Verify that a water treatment plan has been implemented including passivation of galvanized steel units .
See "Water Treatment" section for more details .
6 . If the unit is going to sit idle for an extended period of time, follow all manufacturers' fan motor and pump instructions for long
term storage . Plastic sheets or tarps should never be used to protect a unit during storage . This practice can trap heat inside
the unit, and could potentially cause damage to plastic components .
See your local EVAPCO representative for additional information on unit storage .
7 . For units subject to freezing climates, high humidity climates, or idle periods lasting 24 hours or more, motor space heaters
are suggested and (if equipped) should be energized . Alternatively, fan motors may be energized for 10 minutes, twice daily, to
drive any moisture condensation out of the motor windings .
BEFORE BEGINNING ANY MAINTENANCE, BE CERTAIN THAT THE POWER IS TURNED OFF
Initial and Seasonal Start-Up
1 . Clean and remove any debris, such as leaves and dirt from the air inlets .
2 . Flush the cold water basin (with the strainer screens in place) to remove any sediment or dirt .
3 . Remove the strainer screen, clean and reinstall .
4 . Check mechanical float valve to see if it operates freely .
5 . Inspect water distribution system nozzles and clean as required . Check for proper orientation .
(This is not required at initial start-up. The nozzles are clean and set at the factory).
6 . Check to ensure drift eliminators are securely in place and in the proper orientation .
7 . Adjust fan belt tension as required . See "Fan Belt Adjustment" section .
8 . Lubricate fan shaft bearings prior to seasonal start-up .
9 . Turn the fan(s) and pump(s) by hand to insure it turns freely without obstructions .
10 . Visually inspect the fan blades . Blade clearance should be approximately 10 mm* (6 mm minimum) from tip of blade to the fan
cowl . The fan blades should be securely tightened to the fan hub .
* Depending on fan type, this value can change .
AND THE UNIT IS PROPERLY LOCKED AND TAGGED OUT!
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