2-52 888-2629-200 10/6/10
WARNING: Disconnect primary power prior to servicing.
Section 2 Installation
Maxiva ULX COFDM Series
NOTE:
If the pump is unable to deliver the required flow rate, check for correct wiring of
the 3 AC phases. Incorrect wiring of the 3-phase sequence would cause the
pumps to operate but with much degraded performance. If this is the case, see
"2.11.1.1 Starting Pumps & Checking Pump Rotation" on page 2-38.
STEP 3 Verify that the flow switch operates correctly by decreasing the
amount of flow through the cabinet. The flow warning should activate
and the system should switch to the other pump if set to Automatic. If
set to Manual the pump will shut down.
STEP 4 Go back to the nominal flow rate recommended for the cabinet. The
warning should go away.
2.14.1.1 Heat Exchanger Fan Turn ON Temperatures
Fan operation is controlled by a PID controller in the cooling system control panel.
Review the temperature controller confguration and instruction table in the
manufacturers cooling system manual that ships with each unit. The controller
automatically turns fans on and off according to temperature sensed in the heat
exchanger return line. The fans can also be turned off with isolator switches on the heat
exchanger to allow for maintenance.
Factory settings are Fan 1 set point(set value SV) at 32
o
C with a 5
o
degree hysteresis
window (O1HY). This means Fan 1 turns ON at 34.5
o
C and shuts off at 29.5
o
C. Fan 2
offset (deviation A2DV) will be set at 5.5
o
(37.5
o
C. center temperature) with a 5
degree hysteresis window (A2HY). This means Fan 2 turns ON at 40
o
C and shuts off at
35
o
C.
STEP 1 Use the electronic controller in the pump control panel to verify the
factory settings for Fans 1 and 2. Adjust if necessary.
2.14.1.2 Verify Pump Switching (Dual Pumps Only)
STEP 1 Go to the cooling control panel and select REMOTE on the System
Control switch.
STEP 2 From the HOME screen press SYSTEM on the GUI to view cooling
system control and performance data. This screen is shown in
Figure
3-14 on page 3-19.
STEP 3 Under Pump Control Select MANUAL. The Manual button should be
yellow when selected.
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