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6
ALCOVE INSTALLATION
ECM ECM/UAS FAC
Rear 12" 12" 12"
Top 12" 12" 12"
Sides 0" 0" 0"
Bottom Non-Restricted
The unit can be rolled forward on casters for
easy access to Liebert and customer wiring at
the rear of the unit. To open the front door,
clearance required depends on the size of your
unit. No side clearance is needed.
For applications requiring more than one
enclosure, an optional Cluster Enclosure is
available. In addition to providing more space
for electronic equipment, this configuration
allows cabinets to be connected side-by-side so
that an ECM, FAC, or UPS can serve more than
one cabinet.
INSTALLATION CONNECTIONS
The Little Glass House is a self-contained unit.
The only required connection is for electric
power. For 60 Hz models, the power cord is 9
(2.7 m) feet long and has a NEMA 120 V~ plug,
sized for current (Amps) based on equipment
specified when ordered. For 50 Hz models, a
power cord is included for connection to a
customer supplied plug. The 60 Hz ECM-80
model uses two input power connections, with
one 20 Amp plug for the ECM-80 and the other
plug either 15 or 20 Amps depending on the
UPS model. Refer to table on page 11. The
LGH and its protected equipment should be on a
dedicated circuit and circuit breaker.
Do not defeat ground/earth connections
between the utility/mains outlet and the Little
Glass House. All plug receptacles/sockets in
the vicinity of where the LGH will be used must
be a ground/earth type and grounded/earthed
with an insulated ground/earth conductor of
identical size, insulation material, and thickness
to the grounded/earthed and
ungrounded/earthed supply conductors which is
grounded/earthed to ground/earth at the service
equipment or separately derived source.
NOTE: The utility/mains output must have the
neutral and ground/earth bonded, per the
National Electrical Code, to prevent damage to
the UPS. Damage related to faulty utility/mains
wiring is not covered by Liebert warranty.
Contacts are provided to annunciate two alarms:
High Temperature (100°F - 38°C internal, Back-
up Cooling Fan operating) and Dirty Air Filter
(filter is clogged and requires cleaning).
Customer connection is two compression lug
terminals inside the rear of the unit. These
normally open contacts are rated for 40
milliAmps at 30 volts maximum (Class 2 wiring).
A contact is provided on the rear of the ECM to
indicate power to the compressor (Compressor
on/off). This normally open contact is rated for
0.5 Amp at 120 V~.
A control contact is provided inside the ECM
(under access plate at top left rear) for remote
shutdown/ startup. To use, replace jumper on 37
and 38 with a normally open non-powered
switch, rated for 5 Amps at 120 V~.
To allow communications between the UPS and
a LAN server or other computer system, the
available UPStation GXT is equipped with an
RS-232 interface port. Other UPS
communication options are available, including
SNMP. Refer to the separate UPS manual for
details.
The optional SiteNet™ Integrator is a separate
rackmount unit which communicates status of
the UPS and Little Glass House (including
temperature/humidity and several contact
closures) in SNMP protocol to a network
management system.
No plumbing connections are required as ECM
condensate is evaporated into the heat rejection
airstream. A condensate drain tube (3/8 inch
O.D. copper) is provided with ECM, but a
customer connection is not necessary. The
drain connection may need to be used in
exceptional situations, such as if a door is left
open for longer than 15 minutes while the ECM
is operating.
INSTALLING CUSTOMER EQUIPMENT
The Little Glass House can accommodate rack
mounted or freestanding computer and network
equipment. The unit contains 19 or 24 inch
punched rack rails (per EIA 310), depending on
model selected. Rack rails are provided at the
front and rear of the enclosure. Mounting
hardware available from your Liebert
representative includes a fixed shelf, a pullout
shelf, 19 inch to 24 inch rack rail adapters,
threaded adapters, adjustable position rack rails
and Compaq® adapters. Each optional kit is
supplied with installation hardware.
To maintain unit center of gravity as low as
possible, install customer equipment from the