APC ACRP500 Specifications download pdf (Page 43)

35InRow RP CW Installation

Rack temperature sensors

The rack temperature sensors control the unit airflow and ensure

adequate supply of cooling air to the server racks in the data center.

The unit is supplied with three external rack temperature sensors.

These sensors, along with wire clamps and wire clips, are included

in the install kit supplied with the unit in a separate box.

Installing the rack temperature sensors

1. Insert the rack temperature sensor connector in the temperature sensor port at the user interface.

See “User interface connectors” on page 32.

a. For a top installation, push the rack temperature

sensor through the wire channel located at the

top of the equipment in the left hand side just

above the user interface connectors.

b. For a bottom installation, route the sensor

through the wire clamps along the electrical

panel and then push the sensor through the

customer access hole in the bottom of the

equipment.

2. Route the sensor through either the top or the bottom

of the adjacent server rack.

3. Secure the temperature sensor cable to the front door

of the adjacent server rack at multiple locations using

the provided wire clips as shown.

Note: Remote temperature sensors must be installed for proper operation.

The sensors must be installed where lack of sufficient cooling air is most likely. The

optimum position of the rack temperature sensors will vary from installation to installation.

Servers most likely to have insufficient or inadequately cooled cooling air due to the recirculation

of hot air from the hot aisle include:

a. Servers positioned at the top of a rack.

b. Servers positioned at any height in the last rack at an open end of a row.

c. Servers positioned behind flow-impairing obstacles such as building elements.

d. Servers positioned in a bank of high-density racks.

e. Servers positioned next to racks with Air Removal Units (ARU).

f. Servers positioned very far from the equipment.

g. Servers positioned very close to the equipment.

gen0744a

gen0767a

Wire clip

Temperature

sensor

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APC ACRP500 Specifications Page 43