Williams Medi+ LWMP620 Operating Manual page 6

INSTALLATION
MAINS CONNECTION
Refrigeration equipment is commonly used in
environments located close to liquids, and is
usually operated in and around damp areas,
or where restricted movement for installation
and service is evident.
Great care must be exercised at all times
when installing, operating, or servicing this
appliance.
The equipment is to be powered by a suitable
socket outlet which provides means of switching
off and/or disconnecting the power supply to the
equipment for cleaning or maintenance purposes. It
should be positioned in a clearly visible location, and
be easily accessible at all times. It is advised that
a label be fixed adjacent to the designated socket
outlet for identification purposes, stating the outlet
is used to power the specific medical refrigeration
equipment.
For appliances fitted with a moulded plug for safety,
ensure that the mains power cable is extended
free from the refrigeration system to avoid
entanglement. If a plug or mains cable requires
replacement, contact the Williams Spares Office on
+44(0)1553 817017.
The installation of a fixed appliance and periodic
inspection should only be undertaken by a qualified,
skilled, and competent electrician; and connected
to the correct power supply suitable for the load as
stipulated by the appliance data label.
The electrical installation and connections should
meet the necessary requirements to the local
electrical wiring regulations and any electrical safety
guidelines.
All appliances rely upon a suitable connection
to earth to ensure safe operation. If in doubt,
contact a qualified, skilled, and competent
electrician before using the appliance.
We recommend:-
• Supplementary electrical protection with the
use of a residual current device (RCD)
• Fixed wiring appliances incorporate a switch
disconnector for purposes of safe isolation
to meet the specification requirements of IEC
60947
6
SUPERVISORY & NETWORK CONNECTIVITY
(OPTIONAL)
There is an option to connect the Medi+
refrigeration equipment to third party supervisory
networks and systems such as Building
Management Systems (BMS), and IoT cloud based
systems via an RS485 Modbus data connection. This
will allow for a comprehensive supervision of the
equipment operating parameters and status, such
as internal temperature, defrost cycles and alarms.
The Medi+ equipment controller also provides a volt
free contact, which can be connected to a BMS to
monitor general alarm conditions.
NB: A proprietary cable from Williams
Refrigeration is required and, only suitably
qualified and competent engineers should
install this equipment to such systems. For
more information, please contact Williams
Refrigeration on +44(0)1553 817000.
MAINS POWER SUPPLY FAILURE ALARM
(OPTIONAL)
This alarm is to help safeguard stored medical
samples/items by announcing when a failure of the
mains power supply has occurred. An audible (95dB
sounder), and a visual alarm (red flashing 'Power
failure' indicator) will activate in the advent of a
mains power supply failure.
The alarm will be continuous for a minimum of
12 hours, (whilst the mains power supply failure
remains), powered by a rechargeable battery
integrated into the alarm circuit; however, the
sounder can be muted at any time by pressing the
'Mute' button. Once muted, a blue flashing indicator
signifies that the alarm has been muted. The red
flashing 'Power failure' indicator will continue to be
active whilst there is a failure of the mains power
supply.
When the mains power supply is reinstated the
'Alarm muted' function MUST be reset by pressing
the mute button once more, cancelling the blue
flashing indicator signifying that the alarm circuit is
ready to sense a power failure.
IMPORTANT: for the rechargeable battery
to receive a full charge, it is advised that
the mains power supply is connected for
at least 24 hours. As with all batteries, the
rechargeable battery has a finite operational
life which will vary dependent of a number of
factors, it is therefore, advised that the mains
power supply failure alarm is checked by a
service engineer as part of the routine periodic
servicing of the refrigerator. Only replace the
battery with a Williams Refrigeration approved
and supplied battery.