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EWAD465TZ-SS
Технические данные Страница: 8

Daikin EWAD465TZ-SS [8/75] Options

OPTIONS

One centrifugal pump (low lift) - Hydronic kit consists of: single direct driven centrifugal pump, water filling system with pressure

gauge, safety valve, drain valve. The motor pump is protected by a circuit breaker installed in control panel. The kit is assembled and

wired to the control panel. The pipe and pump are protected from freezing with an additional electrical heater.

One centrifugal pump (high lift) Hydronic kit consists of: single direct driven centrifugal pump, water filling system with pressure

gauge, safety valve, drain valve. The motor pump is protected by a circuit breaker installed in control panel. The kit is assembled and

wired to the control panel. The pipe and pump are protected from freezing with an additional electrical heater.

Two centrifugal pump (low lift) - Hydronic kit consists of: twin direct driven centrifugal pumps, water filling system with pressure

gauge, safety valve, drain valve. The motor pump is protected by a circuit breaker installed in control panel. The kit is assembled and

wired to the control panel. The pipe and pumps are protected from freezing with an additional electrical heater.

Two centrifugal pump (high lift) Hydronic kit consists of: twin direct driven centrifugal pumps, water filling system with pressure

gauge, safety valve, drain valve. The motor pump is protected by a circuit breaker installed in control panel. The kit is assembled and

wired to the control panel. The pipe and pumps are protected from freezing with an additional electrical heater.

Refrigerant leak detection system (available on REDUCED SOUND versions only) Automated permanent refrigerant leak

detection system installed on board. The refrigerant sensors are installed within the compressor acoustic enclosures and are

specifically calibrated for R134a refrigerant. When leaks above a certain concentration are detected, the sensor sends a signal to the

unit controller (a specific alarm is visualized on the unit microprocessor). The automatic shut down and pump down of refrigerant into

the condensing section occurs on the detection of refrigerant leakage. The alarm threshold that triggers automatic pump down upon

detection of refrigerant is set to a maximum of 2000ppm.

ELECTRICAL / CONTROL

Rapid Restart Rapid Restart is the ideal solution for those application where we cannot afford the loose of cooling such as data

centers, health care facilities, process cooling …etc. For this kind of applications, in case of a power failure, chiller equipment are

required to restore the cooling supply to the system as fast as possible.

Standard unit (without the Rapid Restart option) will be starting within 310 seconds after the power is restored and it will be reaching

full load cooling capacity within 20 ÷ 25 minutes (obviously depending on the load demand).

Rapid Restart is allowing the chiller to start as fast as 30 seconds after power is restored and to reach full load cooling capacity in

less than 6 minutes from the unit restart.

For more details about this option please refer to the Control Manual.

Inverter kit for water pump/pumps Inverter kit for unit mounted water pump/pumps (one inverter per each pump). Inverter on

pump/pumps can be used for one of the following purposes:

1. Variable flow systems: water pump velocity controlled by the BMS (0-10 V input signal to the unit). Some recommendations:

a. Minimum evaporator flow rate for single circuit units: 60% of the nominal unit flow rate (nominal unit flow rate is the one

referred to standard conditions: EWT 12/7°C and OAT 35°C).

b. Minimum evaporator flow rate for dual circuit units: 50% of the nominal unit flow rate (nominal unit flow rate is the one referred

to standard conditions: EWT 12/7°C and OAT 35°C).

c. The rate of change in the water flow should not be greater than 10% of the change per minute.

2. Water flow adjustment at start up: the inverter can be used at start-up to adjust the evaporator flow rate to the design value.

Compressors circuit breakers Safety devices that include in a single device all safety functions otherwise provided by standard

fuses and optional thermal relays, such as protection against overcurrent, overload, current unbalance.

Fans speed regulation (+ fan silent mode) - Continuous fan speed regulation of all fans (VFD driven) for improved sound level of

the unit during low ambient temperature operation. At very low temperatures, all fans except the first are switched off thus allowing

unit operation down to -18°C (standard for GOLD and PLATINUM version, optional for SILVER version).

Energy meter - Device installed inside the control box that displays all chiller electrical power parameters at line input such as line

voltage and phase current, input active and reactive power, active and reactive energy, including current limit option. An integrated

RS485 module allows a Modbus communication to an external BMS.

Speedtrol (fan speed control device - ON/OFF - up to -18°C) - Continuous fan speed regulation on the first fan (VFD driven) of

each circuit. It allows unit operation down to -18ºC (available only for SILVER version).

Ground fault relay - To shut down the entire unit if a ground fault condition is detected.

Evaporator flow switch - Supplied separately to be wired and installed on the evaporator water piping (by the customer).

INSTALLATION

Rubber anti vibration mounts - Supplied separately, these are positioned under the base of the unit during installation. Ideal to

reduce the vibrations when the unit is floor mounted.

Spring anti vibration mounts - Supplied separately, these are positioned under the base of the unit during installation. Ideal for

dampening vibrations for installation on roofs and metallic structures.

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Daikin EWAD465TZ-SS [8/75] Options

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