ECH EVAPORATIVE CONDENSERS
OPERATION
140.910-IOM (DEC 13)
Page 8
OPERATION
drive will be properly tensioned at the factory prior to
shipment.
•
Start the fan motor(s) and check for proper fan rotation.
The fan should rotate in the direction of the arrow
indicated on the fan cowl.
•
Run the fan in manual mode for several minutes to check
for any unusual noise or vibrations.
•
For the Sentinel™ Fan System, Sentinel PLUS™ Fan System
or 2-speed motors: check that the starter incorporates a 15
second time delay when switching from high to low speed.
•
Check that the float-operated makeup valve is operating
freely.
WARNING
Check to ensure the controls for the fan motors are set to
allow a maximum of 6 on-off cycles per hour.
Start-up
WARNING
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.
•
Prior to seasonal start-up, lubricate the motor base
adjusting screw (see Figure 10) and the fan shaft bearings.
At initial start-up, no bearing lubrication is required since
the bearings are factory lubricated prior to shipment.
Figure 10 - Adjustable Motor Base
•
Fill the cold water basin with fresh water to the overflow
level via the makeup valve.
a.
Water treatment for new installations
: Initiate the
biocide water treatment program at this time. Refer to
the BIOLOGICAL CONTROL section for more details.
b.
Water treatment for seasonal start-up or after a
shutdown period in excess of 3 days
: Resume the
biocide treatment program and administer a shock
treatment of appropriate biocides prior to operating
the fans. This will eliminate accumulated biological
contaminants. Refer to the BIOLOGICAL CONTROL
section for more details.
WARNING
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.
NOTICE
1. Recommended service intervals are for typical installa-
tions. Different environmental conditions may dictate
more frequent servicing.
2. When operating in ambient temperatures below freez-
ing, the unit should be inspected more frequently. Refer
to “Cold Weather Operation” section for more details
(see Table of Contents).
3. Tension on new belts must be readjusted after the first
24 hours of operation and quarterly, thereafter.
INITIAL AND SEASONAL START-UP
General
•
If the unit is mounted on vibration isolators or isolation rails,
refer to the vibration isolation manufacturer’s guidelines
before loading/unloading weight from the unit.
•
Verify fan and spray pump motors are disconnected and
locked out.
•
Conduct overall external inspection of the equipment.
Check for leaks, corrosion, and any structural damage.
•
Inspect piping and connections.
Cleaning
•
Drain the cold water basin with the strainer in place.
•
Clean and inspect the fan deck.
•
Remove all dirt and debris from the fan guard.
•
Clean all mechanical components, such as the fan and
motor.
•
Flush the cold water basin interior to remove any
accumulated dirt and debris.
•
Remove, clean, and replace the strainer.
Inspection
WARNING
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.
•
Thoroughly inspect the fans for any mechanical or physical
damage.
•
At seasonal start-up or after prolonged shutdown, check
the motor insulation with an insulation tester prior to the
motor start-up.
•
Prior to the seasonal start-up, check and adjust the belt
tension or check gear drive oil levels. At the initial start-
up, the belt tension may not require adjustment as the
