Introduction
4
Chillers
DeltaChill
TM
DeltaChill Technical Manual 9758541 V1.1_06_2020
Safe Operating Limits
The chillers in this range have operating limits set to ensure that the R32 refrigerant does not become unstable. The unit
is designed exclusively for open air use and access should be limited to supervised or authorised personnel only. The
installation of the unit is subject to various design aspects which must be adhered to, as these ensure the safety and
effi ciency of operation.
Flammability
In the event of a leak the combination of the following 3 operating conditions detailed in the fi re triangle MUST be
avoided at all times. Failure to do this could cause a fi re.
OX
YG
EN
HE
AT
FUEL
A CONCENTRATION OF THE REFRIGERANT IN AIR
> LFL (LOWER FLAMMABILITY LEVEL) AND
< UFL (UPPER FLAMMABILITY LEVEL)
14 Vol.% TO 31 Vol.%
EXISTANCE OF AN IGNITION
SOURCE WITH AN IGNITION ENERGY
>MINIMUM IGNITION ENERGY
(30-100mJ)
This refrigerant is classifi ed as lower fl ammability according to the international standard for
refrigerant designation and safety classifi cation, ISO 817:2014.
CAUTION
No smoking or NAKED FLAME
CAUTION
It is important that the ATEX rated panel ventilation fan is not facing any potential sources
of ignition and is kept free from obstruction at all times. In the event of a leak, the ventilation
fan’s purpose is to reduce a potentially fl ammable concentration of refrigerant in the air from
the compressor enclosure to atmosphere. Provision must be taken to ensure that any leaked
refrigerant is not allowed to become stagnant within containment systems or drains.
CAUTION
Site risk assessments, including fi re protocol, must be in place and must include clear safety
instructions describing what to do in the event of a fi re. Such risk assessments must be maintained
by the site operator and be available in the location where the equipment is installed.
R32 can produce toxic and corrosive gasses when burnt such as hydrogen fl uoride. Any burning
refrigerant should not be approached and the appropriate steps, as outlined in the site risk
assessment, should be followed.