Ultima Compact™
Chillers
4
Ultima Compact 30-150kW Technical Manual 9690553 V1.2.0_10_2019
Safe Operating Limits
The Ultima UCCL chiller has operating limits set to ensure that the refrigerant does not become unstable. Certain
aspects of the installation and design must be considered. The unit is defined for open air use only. Access must be
limited to supervised or authorised access only. The installation of the unit is subject to various design aspects, see
below.
Flammability
In the event of a leak the combination of the following 3 operating conditions detailed in the fire triangle MUST be
avoided at all times. Failure to do this could cause a fire.
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 classified as lower flammability according to the international standard for
refrigerant designation and safety classification, ISO 817:2014.
CAUTION
No smoking or NAKED FLAME
CAUTION
Site risk assesments including fire protocol must be carried out and clear safety instructions must
be created for the event of a fire, and maintained by the site operator where the equipment is
installed. R32 can produce toxic and corrosive gasses when burnt, such as hydrogen fluoride.
Any burning refrigerant should not be approached. Details of fire protocol must be created and
maintained by the site operator.
CAUTION
The ventilation fan must be clear from obstructions at all times. It is important that the ATEX
rated panel ventilation fan is not facing any potential sources of ignition. In the event of a leak the
ventilation fan’s purpose is to reduce a potentially flammable concentration of refrigerant in the
air, from the compressor enclosure to the atmosphere. Provision must be taken that any leaked
refrigerant is not allowed to become stagnant within containment systems or drains.
Introduction