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WARNING: Disconnect primary power prior to servicing.
Section 2 Installation
Maxiva ULX COFDM Series
STEP 1 Turn the AC (isolator) switch on the Cooling Control Panel to OFF.
AC power from the AC mains at the main breaker is routed to the Pump
Module and then to the Heat Exchanger via the AC Isolator switch on
the Cooling Control Panel. Pumps and fans each have separates
contactors and current limiters as shown in the pump module & heat
exchanger wiring diagram provided by the manufacturer. The wiring
diagram can be found in the manufacturer’s technical manual shipped
with the unit. A typical wiring diagram is also shown in Figure 4-19 on
page 4-45.
STEP 2 Energize the AC mains supply to the Cooling Control Panel.
STEP 3 Turn the Local/Off/Remote switch on the Cooling Control Panel to
Local.
a. There are two operational modes for the cooling system: Local and
Remote. The selection is made on the Cooling Control Panel.
b. In the Remote mode, pump startup and changeover is controlled by
the transmitter.
c. In local, the pump control panel selects the pump, the selected pump
will run when the AC (Isolator) switch in the front of the cooling
control panel is set to ON.
1.When active, the pump interlock will deenergize the pumps in
either the local or remote modes. The pump interlock is acti-
vated by the transmitter leak detector when it senses a cooling
system leak in the transmitter cabinet.
d. While in Local the operating pump is selected on the cooling control
panel using the Pump Select switch. The local mode can be used for
start-up, testing and troubleshooting.
STEP 4 Have an assistant momentarily turn ON the AC (isolator) switch on
the Cooling Control Panel for 5 seconds or less. The green Pump Run
lamp for either Pump A or B on the Cooling Control Panel should
illuminate briefly.
STEP 5 While the selected pump is coasting to a stop, verify its rotation. The
pump rotation can be verified by noting the direction of shaft rotation at
the front of the pump relative to the rotation arrow marked on the top of
the pump covers.
STEP 6 Select the alternate pump by pressing the Pump Select button and
then having an assistant momentarily turn ON the AC (isolator)
switch on the Cooling Control Panel for 5 seconds or less. The green
Power On lamp for the alternate pump should illuminate momentarily
on the Cooling Control Panel.
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