Product manual

KPMWC00905-10EN - page 11/24
• Chilled-water reset. Accomplished directly on the unit by resetting the leaving water temperature based on the
return water temperature. A remote 4-20 ma or 1-5 VDC BAS signal can also be used to reset the leaving
water. Raising the chilled water setpoint during periods of light loads dramatically reduces electrical
consumption.
• Demand limit control
. Maximum motor current draw can be set on the panel, or can be adjusted from a remote
4-20 ma or 1-5 VDC BAS signal. This feature controls maximum demand charges during high usage periods.
• Condenser water temperature control.
Capable of four stages of tower fan control plus an optional analog
control of either a three-way tower-bypass valve or variable speed tower-fan motor. Stages are controlled from
condenserwater temperature. The three-way valve can be controlled to a different water temperature or track
the current tower stage. This allows optimum chilled water plant performance based upon specific job
requirements.
• Plotting Historic Trends
. Past operation of the chiller can be plotted as trend lines and even downloaded to
spread sheets for evaluation - a valuable tool for optimizing efficiency.
Connection to BMS
The controller can be connected to BMS (Building Management System) based on the most common protocols as
LONWORKS®, BACnet®, or Modbus®; this is possible through serial cards (not included).
Standard accessories (supplied on basic unit)
Evaporator - 2 passes configuration
Evaporator Victaulic kit – Hydraulic joint with gasket for an easy and quick water connection.
Evaporator water side design pressure 10 bar
20mm evaporator insulation
Condenser – 2 passes configuration
Condenser Victaulic kit – Hydraulic joint with gasket for an easy and quick water connection.
Condenser water side design pressure 10 bar
Electronic expansion valve
High pressure side manometers on evaporator and condneser
Water pressure differential switch on evaporator and condenser - Factory mounted, differential switch is available to
detect evaporator and condenser loss of flow.
Inverter compressor starter – For low inrush current and reduced starting torque.
Double pressure relief valve with diverter
Current limit – To limit maximum absorbed current of the unit whenever is required
Hour run meter
General fault contactor
Set-point reset – The leaving water temperature set-point can be overwritten with the following options: 4-20mA from
external source (by user); outside ambient temperature; evaporator water temperature Δt.
Demand limit – User can limit the load of the unit by 4-20mA signal or by network system
Alarm from external device – Microprocessor is able to receive an alarm signal from an external device (pump etc…).
User can decide if this alarm signal will stop or not the unit.
Options (on request)
Evaporator 1/3 passes – availability of these configurations must be checked on the selection software
Evaporator flange kit - Evaporator flanged connections (150 psig) are available instead of the standard victaulic
connections
Evaporator double flange kit