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Extended Shutdown
Perform the following services whenever the unit is shutdown in excess of three days:
• Units that have been installed and operated should remain filled. If the unit is stored
in a freezing climate, the hCore
®
Heat Transfer Technology must be protected from
freezing. For protection against hCore
®
Heat Transfer Technology freeze-up, BAC
recommends the use of an inhibited glycol solution. If protecting the hCore
®
Heat
Transfer Technology with glycol is not possible, then it should be drained completely
and capped once as much water and moisture is removed as possible.
• If the unit is mounted on vibration isolators or isolation rails (by others), refer to the
manufacturer’s guidelines before loading/unloading weight from the unit.
• Disconnect, lockout, and tagout all fans and pumps.
• Close the shut-off valve in the make-up water line (supplied by others) and drain all
exposed make-up water piping.
• Heat trace and insulate all exposed piping.
• To protect from freezing and to minimize the risk of biological contamination during
shutdown, drain the spray water basin.
• Clean all debris, such as leaves and dirt, from the interior and exterior of the unit.
• Clean and flush the water distribution system and spray water basin.
• Leave the spray water basin drain open so rain and melting snow will drain from the
unit.
• Cover the unit discharge to keep out dirt and debris.
• Inspect the protective finish on the unit. Clean and refinish as required. Refer to
“Corrosion Protection” on
page 30
for more details.
• Lockout the fan motor starting device in the “OFF” position to ensure personal safety
in case of future inspection or service.
DANGER:
Rotating equipment
will cause severe personal injury
or death to persons who come in
contact. Do not perform any service
on or near the fans, motors, and
drives, or inside the unit without
first ensuring that the fans and
pump motors are disconnected,
locked out, and tagged out.
Storage and Extended
Shutdown
Prolonged Outdoor Storage
Start-up Preparation After Pro-
longed Outdoor Storage
Extended Shutdown