EVAPCO AT Series Operation And Maintenance Instructions

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Operation and Maintenance Instructions
Introduction
Congratulations on the purchase of your EVAPCO evaporative cooling unit. EVAPCO equipment is constructed of the highest
quality materials and designed to provide years of reliable service when properly maintained.
Evaporative cooling equipment is often remotely located and periodic maintenance checks are often overlooked. It is important to
establish a regular maintenance program and be sure that the program is followed. This bulletin should be used as a guide to
establish a program. A clean and properly serviced unit will provide a long service life and operate at peak efficiency.
This bulletin includes recommended maintenance services for unit start up, unit operation and unit shutdown and the frequency of
each. Please note: the recommendations of frequency of service are minimums. Services should be performed more often when
operating conditions necessitate.
Become familiar with your evaporative cooling equipment. Refer to the isometric drawings located on pages 25-35 for information
on the arrangement of components in your equipment.
If you should require any additional information about the operation or maintenance of this equipment, contact your local EVAPCO
representative. You may also visit www.evapco.com or www.mrgoodtower.com for more information.
Safety Precautions
Qualified personnel should use proper care, procedures and tools when operating, maintaining or repairing this equipment in order
to prevent personal injury and/or property damage. The warnings listed below are to be used as guidelines only.
WARNING: This equipment should never be operated without fan screens and access doors properly secured and in place.
WARNING: A lockable disconnect switch should be located within sight of the unit for each fan motor associated with
this equipment. Before performing any type of service or inspection of the unit make certain that all power
has been disconnected and locked in the “OFF” position.
WARNING: The top horizontal surface of any unit is not intended to be used as a working platform. No routine service
work is required from this area.
WARNING: The recirculating water system may contain chemicals or biological contaminants including Legionella
Pneumophila, which could be harmful if inhaled or ingested. Direct exposure to the discharge airstream and
the associated drift generated during operation of the water distribution system and/or fans, or mists
generated while cleaning components of the water system require respiratory protection equipment
approved for such use by governmental occupational safety and health authorities.
Initial Storage and/or Idle Period Recommendations
If the unit will sit idle for long periods of time it is recommended that the following be performed in addition to all component
manufacturers recommended maintenance instructions.
• The fan bearings and motor bearings need to be turned by hand at least once a month. This can be accomplished by
tagging and locking out the unitʼs disconnect, grasping the fan assembly, and rotating it several turns.
• If unit sits longer than a few weeks, run gear reducer for 5 minutes weekly.
• If unit sits longer than 3 weeks, completely fill gear reducer with oil. Drain to normal level prior to running
.
• If unit sits longer than one month, insulation test motor windings semi-annually.
• If fan motor sits idle for at least 24 hours while the spray pumps are energized distributing water over the heat transfer media,
motor space heaters (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.
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 Evapco Cooling Towers 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

EVAPCO AT Series Specifications

General

Brand	EVAPCO
Model	AT Series
Category	Accessories
Language	English