Acer RM900 Installation Guide

Acer Altos RM900
Installation Guide

1 Getting Started

Unpack the rack and check the packing list that came with it. Make
sure that you have all components.

The unit of measurement used in this
document is "U" (1U = 1.75 inches or 44.45
mm). The total sum of the heights of all
components in the rack measured in "U"
cannot exceed the height of the rack.

1.1 Standard Components

The standard rack consists of the following:

• Removable vented front and rear doors

• Removable side panels

• Stabilizing feet

• Leveling feet

• Casters

• Cable management brackets

• M6 washer-face screws

• M6 cage nuts

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1.2 Optional Components

• Acer Altos 1100, 11000, 12000, and 21000 server rackmount kit

• Fixed monitor shelf

• One 19-inch keyboard/touchpad with sliding shelf

• 4-port keyboard/mouse/monitor switch box

• Blanking panel kit (one 1U, one 2U, and one 3U)

• Acer Altos storage subsystem

1.3 Screw Types Used

The following screws are used in the assembly of the Acer Altos
RM900 and other rack-mountable components:

Screw Type Figure Usage

M4 metal screw

M5 metal screw

M6 washer-face
metal screw

M6 thumbscrew

2

Securing the component
rail to the mounting rail.
See section 8.1

Securing the system
components and the
mounting brackets to the
rack

Securing the system
components to the rack

Securing the server
system to the rack (for
Acer Altos 1100 server)

Screw Type Figure Usage

#6-32 screw

#6-32
thumbscrew

M5 metal tapping
screw

Cage Nut

Installing the front panel to
the server system (for
Acer Altos 11000, 12000,
and 21000 server)

Securing the server and
front panel to the rack (for
Acer Altos 11000, 12000,
and 21000 server)

Securing the cable
bracket to the rack (comes
with the cable bracket
package)

Supports the M6 metal
screws for securing
system components to the
rack

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2 Features

Front Door

2.1 Front View

The following figure shows the front view of the Acer Altos RM900:

Vents

Side Panel

Handle with Lock

Stand and
Stabilizing Foot

Figure 1 The Acer Altos RM900 (42U Rack) - Front View

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2.2 Rear View

(beside caster)

The following figure shows the rear view of the Acer Altos RM900:

Fan

Rear door
Handle

Leveling foot

Figure 2 The Acer Altos RM900 (42U Rack) - Rear View

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2.3 Inside Components

The following figure shows the different components that can be
installed in the Acer Altos RM900:

Monitor

Blanking panelBlanking panel

Storage subsystems

Switchbox

Keyboard/touchpad

with sliding shelf

Server

Server

UPS

Figure 3 A Typical Acer Altos RM900 Enclosure

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2.4 Vertical Mounting Hole Pattern

The four vertical rails of the Acer Altos RM900 contain square
mounting holes arranged in a manner shown in this figure:

0.25”

1U

1U

2U

Figure 4 Vertical Square Mounting Hole Spacing

0.625”

0.625

0.5”

0.625”

0.625”

0.5”

The distance from the center of two holes with closer spacing to the
center of the next pair is equivalent to 1U.

When installing components, you must start your measurement from
the center of the two holes with closer spacing. Otherwise, the screw
holes on the component may not match with those on the rack.

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3 Positioning the Rack

The rack comes with casters to help you move it easily from one
place to another.

To position the rack:

1. Allow the following minimum clearances:
For operation: Leave at least 46 cm (1.5 ft) of clearance in front

of the rack and 31 cm (1 ft) behind the rack to allow adequate
airflow.

For servicing: Allow 61 cm (2 ft) of space behind the rack and
165 cm (65 inches) in front of the rack.

2. After you have positioned the rack, locate the two stabilizing feet
and the two leveling feet placed just next to each caster. These
feet are used for support to ensure that the rack is stable and to
compensate for uneven floors when leveling the rack. See step
2 of Figure 5.

3. Pull out the two stabilizing feet. See step 3 of Figure 5.

4. Rotate each foot to adjust it. Continue adjusting the feet until the
rack is level. See step 4 of Figure 5.

Make sure the rack is stable.

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Step 2

Step 4

Figure 5 Adjusting the Rack Feet

Step 3

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4 Opening and Closing the Door

The rack has one front door and one rear door. Both doors are
vented and can be opened easily.

To open the rack's front or rear door:

1. Slide the keylock cover as far as it will go, press the keylock
button to automatically release the handle. If the door is locked,
unlock it using the key.

2. Rotate the handle 90 degrees counter-clockwise until the latch
releases, and then pull open the door.

Step 1

Figure 6 Opening the Rack Door

To close the rack's front or rear door:

1. Shut the door and rotate the handle clockwise to its original

position.

2. Push the handle until it clicks.

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Step 2

5 Removing and Reinstalling the Door

Step 4

You may need to remove the front and rear doors when installing
components into the rack or when servicing.

To remove the front or rear door:

1. Open the door. See section 4.

2. Locate the release lever in the upper-right corner of the front
door or in the upper-left corner of the rear door.

3. Using your finger, pull down the release lever. This releases the
upper door holder.

4. When the upper holder is released, slightly lift the door to
remove the lower holder from its slot.

Release lever

Step 3

Figure 7 Removing the Rack Door

To reinstall the front or rear door:

1. Place the lower holder into its slot.

2. Using your finger, pull down the release lever while fitting the
upper holder into its slot.

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6 Removing and Replacing the Side

B2

C

Panels

The rack comes with 4 side panels. When installing components or
when servicing, you may need to remove all side panels for quick and
easy access to the components.

To remove the side panels:

1. Each side panel has two screws. Using a coin or any flat-head
tool, rotate each screw 90 degrees clockwise (for the right
panels) or counter-clockwise (for the left panels) to release the
side panel. See A of Figure 8.

2. Use one hand to push the side panel (see B1 of Figure 8) and
another hand to support it at the bottom (see B2 of Figure 8).

3. When the side panel is released, pull it out to totally detach it
from the rack. Repeat the steps until all side panels are
removed. See C of Figure 8.

A

Figure 8 Removing the Side Panel

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B1

To replace the side panels:

B

C

1. Locate the side of the panel that does not contain the screws.

2. Align the groove on that side of the panel with the edge of the
rack, then insert it. See A of Figure 9.

3. Push the other side until it is completely inserted. See B of
Figure 9.

4. Using a coin or any flat-head tool, rotate the two screws on the
panel 90 degrees counter-clockwise (for the right panels) or
clockwise (for the left panels) to secure the panel to the rack.
See C of Figure 9.

Figure 9 Replacing the Side Panel

A

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7

the Rack

The following sections include instructions for installing UPS, server
monitors.

7.1

Cage nuts are use to secure systems and other components to the
vertical rails in the rack.

1.
at the back of a rail.

2. Insert the small end of the cage-nut installation tool through the
opening in the rail and hook the tool over the top lip of the cage

3.
back toward you until the top lip of the cage nut snaps into
position.

Repeat this process to install the other cage nuts in the

7.2 Loading an APC Uninterrupted Power Supply

The UPS protects the equipment from being damaged due to power
fluctuations. Since the UPS is extremely heavy, it should always be

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To load an APC UPS:

1. Unpack the mounting brackets that came with the APC UPS.

2. Adjust the mounting brackets to fit into the rack and then use two
M4 screws to afix them.

Figure 10 Adjusting the Mounting Brackets

1. Attach the mounting brackets to the rack using four M5 screws.

Figure 11 Attaching the Mounting Brackets to the Rack

4. Load the APC UPS into the rack.

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To avoid damage to the equipment or personal
injury, load the APC UPS at the bottom of the
rack only.

5. Secure the APC UPS at the front with four M5 washer-face
screws.

Figure 12 Loading the APC UPS

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