Daikin EWAD740C-SS Сервис мануал онлайн [19/304] 525205

ESIE10-01 General Outline

Part 1 – System Outline 1–13

Compressor hour run meter.

General fault - Alarm relay.

Set-point reset - The leaving water temperature set-point can be overwritten with the following

options: 4-20 mA from external source (by user); outside ambient temperature; evaporator water

temperature Δt.

Demand limit - User can limit the load of the unit by 4-20 mA 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 or will not stop the unit.

Main switch interlock door.

Emergency stop.

Fans circuit breakers - Safety device against motor overloading and short circuit.

Options (on

request)

Total heat recovery - Produced with plate to plate heat exchangers to produce hot water.

Partial heat recovery - Produced with plate to plate heat exchangers installed between the

compressor discharge and the condenser coil, allowing to produce hot water.

Soft starter - Electronic starting device to reduce the mechanical stress during compressor start-up.

Brine version - Allows the unit to operate down to -8°C leaving liquid temperature (antifreeze

required).

Compressor thermal overload relays - Safety devices against compressor motor overloading. This

device together with internal motor protection (standard) guarantee the best safety system for

compressor motor.

Under/Over Voltage - This device controls the voltage value of power supply and stops the chiller if

the value exceeds the allowed operating limits.

Ampere / Volt meter - Device installed inside the control box showing ampere and volt values.

Capacitors for power factor correction - To increase the operating power factor of the unit at

nominal operating conditions. The capacitors are "dry" self-regenerating type with over pressure

disconnecting safety device insulated with a no toxic dielectric mix with no PCB or PCT.

Current limit - To limit maximum absorbed current of the unit whenever is required.

Fan speed regulation - To control the fan speed revolution for smooth operating control of the unit.

This option improves the sound level of the unit during low ambient temperature operation.

Speedtrol - Continuous fan speed modulation on the first fan of each circuit. It allows the unit to work

with air temperature down to -18°C.

Condenser coil guards.

Compressor and evaporator area guards.

Cu-Cu condensing coils - To give better protection against corrosion by aggressive environments.

Cu-Cu-Sn condensing coils - To give better protection against corrosion in aggressive environments

and by salty air.

Alucoat condensing coils - Fins are protected by a special acrylic paint with a high resistance to

corrosion.