32
8.
O
PTIONS
8.1
R
EMOTE ALARM
The connection located at the rear (bottom left) of the unit can be used to connect a remote alarm.
We highly recommend using the NC contact, which also enables an alarm to be transmitted if one of the wires is
disconnected.
Maximum allowable current: 5 A at 30 V DC, 5 A at 250 V AC
Note
: After connecting the wires, screw the connector to its base to avoid any risk of the wires being pulled loose.
8.2
CO
2
/
N
2
BACKUP
1)
Safety rules
Whenever a CO
2
or N
2
backup system is used, it is essential to refer to the safety data sheet.
2)
Cold burns (cryogenic burns)
The “extreme cold” pictogram must be used to warn of this hazard.
If CO2 or N2 injection has been made, don’t open the door to prevent any risk of cryogenic burns.
In case of accident:
WARNING! The temperature of the injury site must be returned to body temperature as quickly as
possible. The appearance of a cryogenic burn initially seems to be minor and does not cause concern. Rinse the burn
with warm water for
at least 15 minutes
.
Cover with a sterile dressing and seek urgent medical attention.
3)
Risk of asphyxiation / suffocation
The “asphyxiation risk” pictogram must be used to warn of this hazard.
Cold vapours are heavier than air and can accumulate in confined locations, particularly at or below floor level.
These gases can result in asphyxiation, even from the second breath, leading to unconsciousness (oxygen content of
less than 18%).
FREEZER AT -80°C, ALARM THRESHOLD SET
TO -60°C
Contact position
above alarm threshold
Contact position
below alarm threshold
Temperature above alarm
threshold (e.g. 59°C):
the contact switches to NC
Temperature below
alarm threshold (e.g.
80°C):
