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Chillers
Design Features & Information
Pressure Relief Valve Discharge Piping
Considerations must be made when designing pipework for PRV venting. This must be designed in accordance to
EN378-3 Section 5.8 Piping and ducting.
● Caution must be taken to ensure excessive pressure drop in the pipework is avoided.
● All piping and ventilation ducting which passes through walls, ceilings and floors of machinery rooms, shall be sealed
where it passes through the walls or floors. The sealing shall have fire resisting properties at least equivalent to the
wall, ceiling or floor.
● Discharge pipes from relief valves, safety valves and fusible plugs may diffuse the charge into the air by adequate
means but away from any air intake to the building or discharge into an adequate quantity of a suitable absorbing
material.
● Relief devices for refrigerant in group A1 (R134a refrigerant) may discharge into the machinery room provided the
system charge is less that the limit set in Annex C of prEN378-1:2016. Such discharges of refrigerant should take
place so that persons and property are not endangered.
● Compression fittings must not be used for the discharge piping.
Water System
Chilled water pipe work and ancillary components must be installed in accordance with:
● National and local water supply company standards.
● The manufacturer's instructions are followed when fitting ancillary components.
● The system liquid is treated to prevent corrosion and algae forming.
● The schematic is referred to as a guide to ancillary recommendations.
The unit water connections are NOT designed to support external pipe work, pipe work MUST be
CAUTION
supported separately.
Standard Recommended Installation
General
The following diagram illustrates the minimum component installation requirements. A wide range of optional extras are
available to suit various applications.
The following installation recommendations should be adhered to. Failure to do this may invalidate
CAUTION
the chiller warranty.
The water flow commissioning valve set is not shown in the diagram, as the valve can be fitted elsewhere within the
chilled water circuit.
1
Filter 20 mesh.
2
Pump.
3
Pressure sensor.
4
Flow switch.
5
Flushing bypass leg.
6
Shut off valve.
7
Pressure gauge.
Full design water flow must be maintained at all times. Variable water flow is not recommended
CAUTION
and will invalidate warranty. The correct operation of the flow proving device is critical if the chiller
warranty is to be valid.
TurboChill™ R513A Air Cooled and FreeCool
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Chiller Technical Manual 7525371 V1.3.0_06_2019
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