Airedale TurboChill FreeCool 200kW - 1830kW - Manual (Page 5)

5 Chiller Technical Manual 7525355 V1.1.0_04_2013
Introduction
Chillers TurboChill™ Air Cooled and FreeCool
Environmental Considerations
Freeze Protection
Airedale recommends the following actions to help protect the unit during low temperature operation. This also includes
the units subject to low ambient temperatures.
Units with supply water temperatures below +5°C
Glycol is recommended when a supply water temperature of +5°C or below is required or when static water can be
exposed to freezing temperatures.
Units subject to ambient temperatures lower than 0°C, a minimum of 1 of the following is required:
1. Glycol of an appropriate concentration (1) is used within the system to ensure adequate protection.
Please ensure that the concentration is capable of protection at least 3°C lower than the minimum operating
ambient.
2.
Ensure water / glycol solution is constantly circulated through all waterside pipework and coils to avoid static
water from freezing.
3. Ensure that pumps are started and running even during shut down periods, when the ambient is within 3°C of
the solution freeze point (1) (i.e. if the solution freezes at 0°C, the pump must be operating at 3°C ambient). (2)
4. Additional trace heating is provided for interconnecting pipework.
(1) Refer to your glycol supplier for details.
(2) If this option is selected with flooded evaporators, an actuated suction ball valve must be fitted to protect the
compressor from liquid migration.
Free Cooling Chillers
A minimum of 20% glycol concentration must be applied to all free cooling chillers. Concentration should be increased
so that its capable of protection at least 3°C lower than the minimum operating ambient.
Environmental Policy
It is our policy to:
•
Take a proactive approach to resolve environmental issues and ensure compliance with regulatory requirements
• Train personnel in sound environmental practices
• Pursue opportunities to conserve resources, prevent pollution and eliminate waste
• Manufacture products in a responsible manner with minimum impact on the environment
• Reduce our use of chemicals and minimise their release to the environment
• Measure, control and verify environmental performance through internal and external audits
• Continually improve our environmental performance
CE Directive
Airedale certify that the equipment detailed in this manual conforms with the following EC Directives:
Electromagnetic Compatibility Directive (EMC) 2004/108/EC
Low Voltage Directive (LVD) 2006/95/EC
Machinery Directive (MD) 89/392/EEC version 2006/42/EC
Pressure Equipment Directive (PED) 97/23/EC
To comply with these directives appropriate national & harmonised standards have been applied. These are listed on the
Declaration of Conformity, supplied with each product.
Occupancy Note
When placing a chiller the occupancy of the surrounding area needs to be classified in accordance with EN 378-
1:2008+A2:2012 section 4.2. In most cases the level of occupancy for a chiller would be ‘Authorised occupancy C’ as
described in EN 378-1:2008+A2:2012 section 4.2.5 Table 1. This level needs to be confirmed by the customer.
Given that an air-cooled chiller can be classified as an ‘indirect system’ in accordance with EN 378-1:2008+A2:2012
section 4.1.3 and the R134a refrigerant falls into refrigerant safety group A1, EN 378-1:2008+A2:2012 Table E.1, no
charge limitations apply if the level of occupancy is ‘C’. Please refer to EN 378-1:2008+A2:2012 Table C.1 for further
details.