Daikin EWAD620-C17C-SS, Service Manual

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General Outline ESIE10-01
1–12 Part 1 – System Outline
3
11
4
5
Regulation type
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Propor in derivative regulation on the leaving water evaporator output probe.
Condensing pressure
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Condensing pressure can be controlled in according to the entering air temperature to the
condenser coil. The fans can be managed either with steps, or with a 0/10 V modulating signal or
with a mixed 0/10 V + Steps strategy to cover all possible operational conditions.
MicroTech III
MicroTech III built-in terminal has the following features.
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164x44 dots liquid crystal display with white back lighting. Supports Unicode fonts for multi-lingual.
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Key-pad consisting of 3 keys.
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Push'n'Roll control for an increased usability.
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Memory to protect the data.
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General faults alarm relays.
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Password access to modify the setting.
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Application security to prevent application tampering or hardware usability with third party
applications.
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Service report displaying all running hours and general conditions.
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Alarm history memory to allow an easy fault analysis.
Supervising systems (on request)
MicroTech III remote control
MicroTech III is able to communicate to BMS (Building Management System) based on the most
common protocols as:
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ModbusRTU.
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LonWorks, now also based on the international 8040 Standard Chiller Profile and LonMark
Technology.
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BacNet BTP certified over IP and MS/TP (class 4) (Native).
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Ethernet TCP/IP.
Standard
accessories
(supplied on basic
unit) Wye-Delta Compressors starter (Y-D) - For low inrush current and reduced starting torque.
Double set-point - Dual leaving water temperature set-points.
Fans thermal overload relays - Safety devices against fan motor overloading in addition to the
normal protection envisaged by the electrical windings.
Phase monitor - The phase monitor controls that phases sequence is correct and controls phase loss.
Evaporator Victaulic kit on water connection - Hydraulic joint with gasket for an easy and quick
water connection.
20 mm evaporator insulation.
Evaporator electric heater - Electric heater controlled by a thermostat to protect the evaporator from
freezing down to -28°C ambient temperature, providing the power supply is on.
Electronic Expansion Valve.
Discharge line shut off valves - Installed on the discharge port of the compressor to facilitate
maintenance operation.
Outside ambient temperature sensor and reset of leaving water temperature set-point.