2-40 888-2629-200 10/6/10
WARNING: Disconnect primary power prior to servicing.
Section 2 Installation
Maxiva ULX COFDM Series
STEP 7 While the alternate pump is coasting to a stop, verify its rotation.The
pump rotation can be verified by noting the direction of fin rotation at
the back of the pump relative to the rotation arrow marked on the pump
cover.
STEP 8 If rotation of both pumps are incorrect, remove and lockout primary
power, then reverse two of the incoming AC mains phases.
STEP 9 Repeat steps 5 through 7 to verify correct rotation of both pumps.
STEP 10 If the rotation of only one pump is incorrect, remove and lockout
primary power, then reverse two of the AC phases to that pump.
STEP 11 Repeat 4 through 5 or 6 through 7 to verify correct rotation of the
formerly incorrect pump.
2.11.1.2 Starting Fans & Checking Fan Rotation
It is necessary to verify rotation of both heat exchanger fans. If rotation is incorrect air
flow will be low and the cooling system will not cool properly.
STEP 1 The proper rotation of both pumps should be confirmed prior to
checking fan rotation. See 2.11.1.1
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.
STEP 4 Turn the heat exchanger fans switch to Manual.
STEP 5 Turn ON the AC (isolator) switch on the cooling control panel.
STEP 6 Briefly Turn ON the AC (isolator) switch on the Heat Exchanger fan
being checked.
STEP 7 While the selected fan is coasting to a stop, verify its rotation. The
fan rotation can be verified by noting the direction of blade rotation
relative to the rotation arrow marked on the side of the fan connection
box. Improper fan rotation can be corrected by changing any two of the
phases (inside the control panel) supplying the fan.
STEP 8 Activate the other fan by briefly turning ON AC (isolator) switch
near the heat exchanger fan being checked.
STEP 9 While the selected fan is coasting to a stop, verify its rotation. The
fan rotation can be verified by noting the direction of blade rotation
relative to the rotation arrow marked on the side of the fan connection
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