Harris Maxiva ULX, Technical Manual

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2-8 888-2629-200 10/6/10
WARNING: Disconnect primary power prior to servicing.
Section 2 Installation
Maxiva ULX COFDM Series
!
CAUTION:
FOR VERTICALLY MOUNTED HEAT EXCHANGERS, THERE SHOULD BE NO
OBSTRUCTION WITHIN TWO METERS IN FRONT OF THE EXHAUST SIDE OF THE
FAN (EXHAUST AIR IS DIRECTED OUT THE SIDE OF THE UNIT) OR WITHIN 1
METER OF THE INTAKE SIDE OF THE FAN. HORIZONTALLY MOUNTED HEAT
EXCHANGERS (EXHAUST AIR DIRECTED UPWARD) SHOULD HAVE NO
OBSTRUCTIONS WITHIN TEN METERS OF OUTPUT EXHAUST.
A method of protection from direct wind is recommended on the exhaust side of
vertical heat exchanger fans. A blocking partition approximately 4 meters from the
exhaust side of the fan is recommended.
Other liquid cooling system installation recommendations are listed below.
a.
The pump module, heat exchanger and transmitter’s total coolant plumbing cir-
cuit length
must not exceed 40 meters (131 feet) total length including supply and
return lines. Vertically, a maximum difference of 8 meters (26 feet) between
pump module/heat exchanger and the transmitter is allowable.
Layout the liquid cooling system with as few elbows as possible because exces-
sive elbows or back to back 45 or 90 degree elbows will greatly restrict the cool-
ant flow. If hose is used instead of copper lines, avoid sharp bends of the hoses
because that can collapse the hose at the bend and greatly restrict coolant flow.
Hoses will require more support than copper lines. If hoses are to be used, lay
them in a tray if possible, or plan hose supports a MINIMUM of 1 meter apart.
b.
Any turbulence causing device in the coolant plumbing system can restrict flow
and increase the dynamic head pressure of the pump. If two turbulence causing
devices are connected back to back, the flow restriction and pressure drop across
the pair of devices is greatly multiplied over the restriction of the individual
devices. Turbulence causing devices include, but are not limited to elbows (45
and 90 degree), tees, ball valves, gate valves, globe valves, flow sensors, pipe
diameter changes, and etc. To minimize the effects of any turbulence causing
device added to the coolant plumbing system, a good rule to follow is to have 10
diameter lengths of straight pipe between turbulence causing devices. This will
allow the turbulence to dissipate and the flow to become uniform. It has an effect
called “static pressure regain” which will cancel out much of the flow restriction
and pressure drop caused by the device.
c.
An electrical control panel is integrated into the pump module assembly. Some
early versions of the pump module and electrical panel were specifically designed
for
indoor use only and should be positioned near the transmitter so the electrical
panel can be readily viewed and is easily accessible. Later model pump modules
can be used either indoors or outdoors. Outdoor models are equipped with
weatherproof covers on the pump motors and on the control panel.