LPCA 055-060-070-075-085-090-100-115 125-135-150-170HMB

Microprocessor controller
All units are equipped with an electronic programmable control
system. This allows complete management of all the functions of
the unit and ensures protection of all vital parts. It has a
diagnostics function, permitting easy and straightforward
understanding of all the possible failures and malfunctions of the
unit. All functions and indicators appear on the LCD screen. Over
150 programmable parameters offer complete unit management.
Critical parameters that require control are:
ñ Start-up shut down time of compressor.
ñ Time delay.
ñ Protection against multiple start-up.
ñ Water pump time delay in reference to compressor operation.
ñ Inlet/outlet water temperature.
ñ Air heat exchanger temperature.
Controlled operational parameters
ñ Water temperature adjustment in the inlet side during summer
operation*.
ñ Water outlet temperature adjustment in summer operation**.
ñ Water temperature adjustment in the inlet side during winter
operation*.
ñ Water outlet temperature adjustment in winter operation*.
ñ Compressor capacity control.
Controlled fault parameters
ñ Low suction pressure per refrigerant circuit.
ñ High discharge pressure per refrigerant circuit.
ñ Compressor overload.
ñ Fan motor overload.
ñ Water pump overload.
ñ Flow switch fault.
ñ Water sensor error due to bad contact or sensor failure.
ñ Error reading in water outlet low temperature.
ñ Compressor operating hour reading.
In addition the control also includes
ñ Self diagnostic error of all electronic control sensors.
ñ Remote on/ off switch.
ñ Remote alarm indication capability.
ñ Remote cool/heat selector switch.
ñ History of operation points and fault codes**.
ñ Password access code.
Refrigerant circuit
The units have multiple refrigerant circuits depending on the size
one per tandem compressor.
Each circuit consists of the following:
ñ Thermal expansion valve.
ñ Filter drier with a replaceable core.
ñ Shut off valves.
ñ Two way solenoid valve.
ñ Sight glass for checking the liquid lines.
ñ 4-way reversing valve.
ñ Suction accumulator.
ñ Liquid receiver.
ñ Check valve.
ñ High and low pressure gauges for each refrigerant circuit,
easily viewed.
ñ Service valves.
ñ Unit protection is provided by a high pressure switch with
manual reset, low pressure protection is a low-pressure
switch with auto reset.
ñ Flexible refrigerant pipe on the compressor discharge and
suction lines to avoid vibration and noise.
Optional accessories
Microprocessor controller options
ñ BMS module interface kit for Bacnet, Lon Works and Trend
connection**.
ñ BMS interface kit for Modbus connection.
ñ Connection via internet using a device converting the Carel
protocol to 10Mb/s TCP/IP ethernet protocol**.
ñ Possibility to send and receive messages using a GSM
modem**.
ñ Communication card through RS232 / RS485 serial ports.
ñ Extended memory card for up to five thousands messages**.
ñ Extended memory card 1&2 MB**.
ñ Parallel chiller operation with standard controller for units
with a maximum of eight compressors**.
ñ Microprocessor parameter reprogramming card.
ñ Compressor running current**.
ñ Self diagnostic and adaptive control**.
Other unit accessories/option
ñ R407c or R22 refrigerant.
ñ Condenser fins made of copper or prepainted aluminum, and
Blygold treatment for corrosion protection.
ñ Glycol for chilled water temperature down to –5 o C.
ñ Continuous linear fan speed regulation.
ñ High pressure relief valve on compressor discharge.
ñ A-meter, V-meter.
ñ Compressor noise reduction jacket.
ñ Electrical board ventilation fan.
ñ Water heat exchanger antifreezing electrical heater.
ñ Other custom built options upon request.
* For models 055-085
** For models 090 – 170
Interklima Hydronic systems
LPCA 055-170HMB ñ R407c/Tandem Scroll 5