4
1 - INTRODUCTION
The AquaForce Puretec
TM
30XBEZE and 30XBPZE units are
designed to cool water for the air conditioning of buildings and
industrial processes.
Prior to the initial start-up of the 30XB(E/P)ZE units, the people
involved in the on-site installation, start-up, operation, and
maintenance of this unit should be thoroughly familiar with these
instructions and the specific project data for the installation site.
They are designed for an operating life of 15 years by assuming
a 75% utilisation factor; that is approximately 100,000 operating
hours.
The 30XB(E/P)ZE liquid chillers are designed to provide a very high
level of safety during installation, start-up, operation and
maintenance. They will provide safe and reliable service when
operated within their application range.
This manual provides the necessary information to familiarize
yourself with the control system before performing start-up
procedures. The procedures in this manual are arranged in the
sequence required for machine installation, start-up, operation
and maintenance.
Always ensure that all required safety measures are followed,
including those in this document, such as, wearing protective
clothing (gloves, ear defenders, safety glasses and shoes), using
appropriate tools, employing qualified and skilled technicians
(electricians, refrigeration engineers) and following local
regulations.
To find out, if these products comply with European directives
(machine safety, low voltage, electromagnetic compatibility,
equipment under pressure etc.) check the declarations of
conformity for these products.
1.1 - Installation safety considerations
According to ISO-817, R1234ze(E) is classified in safety group
A2L: lower flammability. One of the characteristic of this refrigerant
is the absence of flammable mixture with air under 21°C of
ambiance and controlled humidity conditions. However when
humidity or temperature goes up, this refrigerant can become
flammable and can represent a potential danger if flammability
risks are not properly mitigated within the near vincinity of the unit
or in the machine room installation.
Local building codes and safety standards shall be followed.
In absence of local codes and standards, please refer to EN-378
(2012) (Safety requirements for substances classified A2) or to
ISO-5149 (2014) (for substances classified A2L) as a guide.
Customer shall obtain approval from the local building authorities.
Carrier also provides additional guidelines for the safe use of
R1234ze(E) refrigerant that should be added to the requirements
of safety standards and building codes to insure that the risks are
minimised to acceptable levels.
For further details on physical properties, flammability & toxicity
characteristics, hazards Identification, installation safety
requirements, etc., refer to standards such as:
-
SHRAE 34, EN 378, ISO-817 and ISO-5149
-
European union’s REACH database (Registration, Evaluation,
Authorization and Restriction of Chemicals)
Operations have to be performed by qualified and fully trained
technicians for flammable refrigerant using and associated risks
(see EN 378-4, annex E).
Use a portable gas detector for any intervention on the unit.
Due to R1234ze(E) mild flammability, a 0.5m perimeter around
the unit is considered as ATEX zone 2 (see chapter 3 - Dimensions,
clearances). In this area, no ignition source must be present (see
EN 378-2, Annex K).
If an ignition source is identified, an additional ventilation shall be
installed.
Define a non smoking area around the unit.
30XB(E/P)ZE chillers are classified as “Indirect heat exchange
system”. They are intended to be installed in open air in a restricted
access location (category “c” according to ISO-5149 and EN-378).
Access to the unit must be reserved to authorised personnel,
qualified and trained in monitoring and maintenance. The access
limitation device (e.g. cut-off, enclosure) is under the customer’s
responsibility.
The unit shall be installed in a location where the air flow is free
and the minimum distance from a building opening is 6 meters.
No refrigerant charge restriction applies (Class III - open air or
machinery room and occupation category “c”) with R1234ze(E).
For more details, refer to the standard EN-378-1. This category
shall be confirmed by the customer.
After the unit has been received, when it is ready to be installed
or reinstalled, and before it is started up, it must be inspected for
damage. Check that the refrigerant circuit(s) is (are) intact,
especially that no components or pipes have shifted (e.g. following
a shock). If in doubt, carry out a leak tightness check and verify
with the manufacturer that the circuit integrity has not been
impaired. If damage is detected upon receipt, immediately file a
claim with the shipping company.
An appropriate fire extinguisher shall be accessible and visible in
the unit installation area.
Carrier strongly recommends employing a specialised
company to unload the machine.
Do not remove the skid or the packaging until the unit is in
its final position. These units can be moved with a fork lift
truck, as long as the forks are positioned in the right place
and direction on the unit.
The units can also be lifted with slings, using only the
designated lifting points marked on the unit.
These units are not designed to be lifted from above. Use
slings with the correct capacity, and always follow the lifting
instructions on the certified drawings supplied with the unit.
Safety is only guaranteed, if these instructions are carefully
followed. If this is not the case, there is a risk of material
deterioration and injuries to personnel.
RELATED TO PROTECTION DEVICE
Check that the protective devices are well installed before
operating the unit.
DO NOT COVER ANY PROTECTION DEVICES.
This applies to relief valves (if used) in the refrigerant or heat
transfer medium circuits. Check if the original protection
plugs are still present at the valve outlets. These plugs are
generally made of plastic and should not be used. If they are
still present, please remove them. Install devices at the valve
outlets or drain piping that prevent the penetration of foreign
bodies (dust, building debris, etc.) and atmospheric agents
(water can form rust or ice). These devices, as well as the
drain piping, must not impair operation and not lead to a
pressure drop that is higher than 10% of the control pressure.
