TurboChill™
Chillers
13
TurboChill Water Cooled Technical Manual 9216326 V1.10.0 06_2017
System Configuration
S
G
L
Evaporator/ Condenser
Evaporator Differential Pressure Switch
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Condenser Differential Pressure Switch
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Evaporator Water Temperature Sensors
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Evaporator Water Temperature Sensors
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Dual Pressure Relief Valves
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Standard Feature
○
Optional Feature
–
Feature Not Available
Evaporator and Condenser
Condenser Inlet (Return)
Condenser Outlet (Supply)
Evaporator Outlet (Supply)
Evaporator Inlet (Return)
Image for illustration purposes only
Dual Pressure Relief Valve
An auto resetting pressure relief valve assembly shall be provided for both the evaporator and condenser heat
exchangers, opening on pressure rise above 14 barg. The dual shut-off valve assembly incorporates 2 pressure relief
valves which can be individually shut off via a 3 way valve. This allows the maintenance of individual pressure relief
valves without any requirement for refrigerant evacuation. Pressure relief valves have been sized to ensure that in the
event of fire they can prevent excessive build-up of pressure within the evaporator and condenser. EN13136:2013
section 6.2.1 has been used to size valves accordingly.
External Fire
Fire is a hazard that these units have not been designed to operate under. However, the inclusion of various safety
devices ensures that any damage due to fire is limited via the release of pressure in the form of gas discharge.
If concerns of the ability of the pressure relief valve to discharge in the event of a fire >107°C exist, then it is the
responsibility of the end user to protect the pressure relief valve assembly from excessive external temperatures.
This must however allow the pressure relief valve to discharge effectively and not act as a ‘choke’ (offer any resistance)
when discharging.
Introduction
