Section BXM‐10N‐HE3‐20A
030‐101741 Rev. B
R
16
1311IARB
Figure 21. Clean the Air Intake/Exhaust Vents
remove any debris
from the screened holes
Periodically
customer may optionally lock the door with a padlock (custom
er supplied) through the holes provided for it at the bottom of
the door‐lock flanges.
4.
MAINTENANCE
The Westell
r
Boxer
r
components are maintenance‐free, how
ever, please note the following item.
S
At least once every six months, periodic inspections
should be performed on the Boxer cabinet to remove any
debris from the fan cover's screened holes (Figure 21).
This facilitates proper operation of the cabinet and allows
unobstructed air flow.
5.
SERVICE AND REPAIRS
Replacing parts is the only recommended type of field repair
for the Westell
r
Boxer
r
cabinet. The list below contains the
only Boxer parts which may be ordered and field‐replaced (see
Part 6 for a telephone number, Table 4 for part numbers, and
Paragraph 7.2 for the return procedure). See Paragraph 5.1
through 5.4 for detailed steps to remove and replace these parts.
Field‐replaceable parts:
S
Controller Card
S
Internal Fans
S
Door Alarm Sensor Assembly
‐ CAUTION ‐
To avoid electrical shock, turn off any DC or AC power feeds
to the panel before removing or replacing the controller card.
5.1
Replacing the Controller Card
The Controller Card cannot be field
repaired
. Should a prob
lem be suspected with the card, it must be removed and
returned to Westell for service, then re‐installed or
replaced
.
Follow the steps below to replace the controller card.
1.
Disconnect power.
Disconnect power to the card by remov
ing the power Euro‐connector block (labeled “–V” and
“+V”. Pull the connector toward the cabinet front.
2.
Remove all connectors.
Disconnect all other wire connec
tions in the card by simply pulling off each Euro‐connector
in the controller card (on all sides of the card, see
Figure 17) in similar fashion, labelling each connector as
it is removed, to facilitate re‐connection with the replace
ment card. It is not necessary to remove any wires from the
connectors (unless a fan is suspected of being faulty and is
also being replaced).
3.
Remove card.
Remove the old card by unscrewing the nuts
that secure the card to the cabinet wall, then pulling the
card off the studs.
4.
Install new card.
Replace the old card with the new card,
ordered and received from Westell. Be sure the card label
ling is visible and not upside down, align the mounting
holes in the card with the posts on the cabinet wall, then
tighten the nuts onto the studs to secure the card. Re‐in
sert or snap‐on all connectors in their proper positions in
the card, connecting the power connector block last.
5.
Test.
Verify the alarms and fans work. Verify the fans are
working properly by pressing the fan test button (see bot
tom of Figure 17 for location).
‐ CAUTION ‐
To avoid electrical shock, turn off any DC or AC power feeds
to the controller before beginning this procedure.
5.2
Replacing the “Outside Air” Fans
Fans cannot be field
repaired
but are field replaceable. Should
a problem be suspected with an “outside air” fan, remove the
fan and return it to Westell for service, then replace it. See
Table 4 for ordering information. To remove and replace an
“outside air” fan, proceed with the following instructions.
1.
Open the cabinet.
Open the cabinet door by loosening the
cup‐washer screws with a 216 tool or can wrench (‐NHE3)
or with the provided pin‐in‐hex wrench (‐NHE3G).
2.
Remove cover.
Remove the heat exchanger compartment
cover by first loosening the Phillips screw (near the bottom
center of the interior surface of the door, see Figure 3) with
a Phillips screwdriver, then lifting the cover off the two
posts that secure it, at the exterior top of the cabinet door.
3.
Remove fuse.
Remove the 5A fan fuse from the controller
card (see Figure 9 or Figure 17 for fuse location).
4.
Disconnect fan power.
Disconnect the FAN A connector at
the controller card.
5.
Remove wires from connector.
Remove both wire sets from
the now disconnected Fan A Euro‐connector by unscrew
ing the two set screws in the connector, pull out the
loosened wires. Note that two same‐colored wires, one
from each fan, were twisted together to form a single wire
for each wire‐port connection.
6.
Replace connector.
Insert the empty connector back into
the controller card.
7.
Note fan cable routing and free the cable wires.
Make a
note of the fan cable wire‐routing between the fan mount
ing location (through the hole in the door) and the
controller card, for reference when installing the replace
ment fans/cable wires. Gently free or loosen the wires
from any cable management devices.
