3
introduction
These instructions are intended to assure that field connections are completed
properly and the control system operates for the maximum time possible. Since
product warranty may depend on your actions, please read these instructions
thoroughly prior to operation.
If you have questions about the operation and/or maintenance of this control
system and you do not find the answers in this manual, please contact your
Marley sales representative.
Hazard of electrical shock or burn. Be sure to turn off power to the
panel before servicing. If working on equipment out of site of panel
disconnect, lockout using standard lockout procedure.
Safety First
The Marley control system uses UL listed components installed in accordance
with the National Electric Code. The location of the cooling tower and field
installation of the control system can affect the safety of those responsible
for installing, operating or maintaining the tower and controls. However,
since SPX Cooling Technologies does not control the tower location, or field
installation, we cannot be responsible for addressing safety issues that are
affected by these items.
The following safety issues should be addressed by those responsible
for installation, maintenance or repair of the tower and controls:
• Access to and from the control panel (including the customer supplied
main disconnect/branch circuit protection.)
• Proper grounding of electrical control circuits.
• Sizing and protection of branch circuits feeding the control panel.
• Qualification of persons who will install, maintain and service the electri-
cal equipment.
These are only some of the safety issues that may arise in the design and
installation process. Marley strongly recommends that you consult a safety
engineer to be sure that all safety considerations have been addressed.
Other safety issues are addressed in literature supplied with your tower. You
should closely review the literature prior to installing, maintaining or repairing
your tower.
Warning
Warning
