140.960-IOM (JUN 2016)
Page 49
IDCF & IDC3 EVAPORATIVE CONDENSERS
MAINTENANCE
PROLONGED OUTDOOR STORAGE
Storage Preparation
Perform the following when preparing for storage. If the unit
is installed, conduct the “Extended Shutdown” procedure
beforehand.
• Ensure the water basin is fully drained and the drain is
open.
• For storage prior to installation, all components and
accessories, which sometimes ship inside the unit and are
not a permanent fixture in the basin, should be removed
and stored indoors.
• Remove the bottom drain plug to the spray pump(s). Put
the plug(s) in a marked plastic bag and attach to the spray
pump(s) for future use.
•
Remove and store fan belts (if supplied) at room temperature.
Tag belts appropriately for future identification.
NOTICE
Covering the unit with a clear plastic tarpaulin during stor-
age can trap heat inside the unit and cause damage to the
PVC components. If units must be covered during storage,
an opaque, reflective tarp with vents should be used.
• Nitrogen Charge Precautions
1. Storage Prior to Installation – The coils should be
charged with nitrogen at 15 psig at the factory.
2. Extended Shutdown Periods after Start-Up – The coils
should be charged with nitrogen at 15 psig in the field
and capped by adding a threaded connection or a
welded cap. Upon start-up, the coil connections will
require cutting and bevelling.
• Apply a weather-resistant lubricant or heavy grease such
as Anti-Seize (Part# 160069) to all exposed threaded
or flanged connections and the adjustable motor base
threaded rod.
• Insert desiccant bags into the control panel (if supplied) to
absorb moisture. Seal the control panel for storage.
• Spray coat electrical component housings (if supplied)
with a suitable protective coating, such as Cosmoline®
Weathershed, and individually cover them with plastic,
taking care to leave openings for free air circulation.
• Inspect the protective finish on the unit. Clean and
refinish as required. For more detail, refer to “Corrosion
Protection" section.
• Verify combined inlet shield retainers are compressed.
Motor Recommendations
Standard motors are designed for storage at ambient
temperatures of -20°F to 104°F (-28.9°C to 40°C). Prolonged
periods of exposure above or below these specified conditions
could degrade components of the motor and cause malfunction
or premature failure.
• Motors should be removed and stored inside whenever
possible. When indoor storage is not possible the motors
must be covered with a tarpaulin. Do not use plastic or
plastic film. This cover should extend below the motor and
be secured; however, it should not tightly wrap the motor.
This will allow the captive air space to breathe, minimizing
formation of condensation.
• Care must also be taken to protect the motor from flooding
or from harmful chemical vapors.
• The storage area should be free from ambient vibration.
Excessive vibration can cause bearing damage.
• Precautions should be taken to prevent rodents, snakes,
birds, or other small animals from nesting inside the
motors. In areas where they are prevalent, precautions
must also be taken to prevent insects from gaining access
to the interior of the motor.
• If not stored indoors in a controlled environment, some
form of heating must be utilized to prevent condensation
from accumulating in the motor. This heating should
maintain the winding temperature at a minimum of 9°F
(5°C) above the ambient temperature of the surrounding
environment, keeping it from dropping below the dew
point where condensation could form inside the motor.
If space heaters are supplied, they should be energized.
Request the required voltage and transformer capacity
from your Frick sales representative. A third option is to
use an auxiliary heat source and keep the winding warm by
either convection or blowing warm air into the motor.
• Rotate the motor shaft monthly to redistribute bearing grease.
General Maintenance Requirements
• Rotate all fan(s) and motor shafts monthly by hand. Hand-
turning will ensure that the shafts and bearings are free
and will redistribute grease within the bearings.
DANGER
Do not perform any service on or near the fans, motors,
drives, or inside the unit without first ensuring that the fans
and the pumps are disconnected and locked out. Rotating
equipment can cause severe personal injury or death to
persons who come in contact.
• Inspect the water basin monthly to ensure that the drain
is open and remove any leaves or debris that may have
accumulated in the water basin.
• Inspect the axial fan(s) annually to ensure the blades are
tight and there is no obvious corrosion between the hub
and the fan blade.
• Inspect the rust preventative coating on all motor external
machined surfaces including shaft extensions monthly. If
necessary, re-coat the surfaces with RUST VETO®.
Start-Up Preparation After Prolonged Storage
Keep in mind that start-up procedures after long periods of
storage are just as important as pre-shutdown procedures.
• Motors should be thoroughly inspected, cleaned, and
restored to pre-storage condition.
• Inspect axial fan(s) prior to start-up to ensure that the
blades are tight and that there is no obvious corrosion
between the hub and the fan blade. Do not energize the
fan(s) if there is obvious corrosion of fan components.
Loose fan blades could result in fan failure and possible
injury or damage.
• Reinstall all fan belts, motors, door gaskets, and drain
plugs (as applicable), and remove all protective coverings.
• For units stored prior to installation, conduct rigging
procedures as directed in the unit’s Rigging and Assembly
Instructions.
• Perform an insulation test of motor windings to ensure
satisfactory insulation resistance.
• Conduct full start-up procedure as stated in the “Start-
Up Procedure." Be especially thorough for cleaning and
inspection prior to start-up.
