references
Water-cooled chillers
HYDROCIAT
DESCRIPTION
HYDROCIAT LW - LWP
Compressors
Accessible hermetic twin screw type Optimised profile of rotors ensuring high efficiency Electrical motor incorporated with star-delta starter Integral electronic protection of motor Control of the phase balance and rotation direction Integrated overpressure valve Discharge temperature control Lubrication under controlled pressure 3-stage integrated oil separator Crankcase heater Thin filter at suction Discharge valve Slide for modulating continued output capacity control Assembly on antivibration mounts
Electrics box
IP 21 Electrical supply 400 V - 3 ph. - 50 Hz + earth (-10% / +10%) Main fused isolator with outside handle Transformer for control circuit Compressor motors contactors Compressor motors protection by fused circuit breakers (depending on sizes of compressors). General earth connection Phase controller (reversal, loss, over and under voltage)
Electronic module with microprocessor XTRACONNECT2
With the following main functions : Chilled water or hot water temperature control Possibility of water temperature variation according to the outside temperature (water law) Low temperature ice storage control Second setpoint management Complete management of compressors with start-up sequence, timer and runtime balancing Self-adjusting and proactive functions with adjustment of settings drift control Continuous capacity reduction according to cooling or heating requirements Compressors anti-short cycle protection Management of machine's operating limitations depending on outdoor temperature Automatic switching from heating/cooling depending on outdoor temperatures Control and optimisation of operating parameters Diagnosis of operation and fault states Diagnosis and storage of the last 20 faults with operating readings at the time the fault occured Master/slave management of two machines in parallel with balancing of the running times and automatic changeover if a fault occurs on one machine Machine timer programming Display and access of operating parameters via a multilingual LCD screen with 4 lines of 24 characters
Evaporator
Direct-expansion shell and tube High-efficiency copper tube bundle Steel shell Corrosion-resistant baffles Closed-cell thermal insulation foam
Water-cooled condenser
High performance copper tubes bundle Carbon steel shell Carbon steel tubular plates Removable cast iron headers Safety valves on the refrigerant circuits
HPS (High Power System) on models LW/LWP...HPS
The HPS system allows a significant increase in the cooling capacity, improving the performance coefficients EER and ESEER of your installation, particulary in part load, and therefore ensuring an optimal operation of the unit all year round.
Refrigerant accessories
Filter dryers with rechargeable cartridges Liquid sight glasses Solenoid valves on liquid refrigerant lines Electronic expansion valves
Safety and regulation devices
HP/LP pressure sensors Low and high pressure safety valves Chilled water control sensor (inlet or outlet) External temperature sensor Evaporator antifreeze sensor Compressors discharge sensor Evaporator water flow switch
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HEAT PUMPS- AIR CONDITIONING - REFRIGERATION - AIR HANDLING - HEAT EXCHANGE - NA 17.01 A