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Summary of Contents for Daikin EWAD120MBYNN1
- Page 1 OPERATION MANUAL Packaged air-cooled water chillers EWAD120MBYNN1 EWAD150MBYNN1 EWAD170MBYNN1 EWAD240MBYNN1 EWAD300MBYNN1 EWAD340MBYNN1...
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Page 2: Table Of Contents
The EWAD Nominal air flow 1920 /min) units can be combined with Daikin fan coil units or air handling units No. of motors x output 8 x 550 8 x 1020 8 x 1020 (kW) for air conditioning purposes. -
Page 3: Description
ESCRIPTION The EWAD air-cooled water chillers are available in 6 standard sizes. EWAD120~170 15+19 1000 1000 1000 1000 1000 EWAD240~340 4 10 15+19 EWAD120~170 EWAD240~340 Figure - Main components Evaporator Air purge evaporator Field wiring intake Condenser Leaving water temperature sensor (R4T) Main isolator switch (optional - S13S) Compressor 1 (M1C) Entering water temperature sensor (R3T) -
Page 4: Function Of The Main Components
Function of the main components Y11S Y21S S2PH S15PH S1PH S14PH Y15S Y25S Y14S Y24S EWAD120~170 EWAD240~340 Figure - Functional diagram Water outlet Safety valve Flowswitch Evaporator Strainer Condenser Water inlet Drier/charge valve Standard Compressor Liquid stop valve Dual pressure relief valve Suction stop valve (optional) Sightglass Standard (see A) or optional dual... -
Page 5: Internal Wiring - Parts Table
Fan motor thermal protector (part safety devices) H1P .... * ..Indication lamp general operation The condenser fan motors are equipped with thermal protectors H2P .... * ..Indication lamp alarm (Q*F). The protectors are activated when the temperature H3P,H4P..* ..Indication lamp operation compressor 1, becomes too high. -
Page 6: Before Operation
S14PH,S15PH ..High pressure switch circuit 1, circuit 2 11 Air inlet/outlet TC01~TC04....Optocoupler (analog to digital signal) Check that the air inlet and outlet of the unit is not obstructed by paper sheets, cardboard, or any other material. TR1 ......Transfo control circuit TR2 ......Transfo supply controller + digital inputs 12 Power supply voltage V1.... -
Page 7: Operation
PERATION key, to enter the user password menu. key, to enter the DICN menu, also referred to as network The EWAD units are equipped with a digital controller offering a user- menu. friendly way to set up, use and maintain the unit. key, has no effect on EWAD units. - Page 8 Switching the unit on Consulting actual operational information Press the J key on the controller. Enter the readout menu. Refer to the chapter "How to enter a menu" on page Depending on wheter or not a remote ON/OFF switch has been configured (refer to the installation manual), the following...
- Page 9 Adjusting the temperature setpoint Resetting the unit The unit provides definition and selection of four independent The units are equipped with three kinds of safety devices: unit temperature setpoints. Two setpoints are reserved for inlet control, safeties, circuit safeties and network safeties. the other two are reserved for outlet control.
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Page 10: Advanced Features Of The Digital Controller
Advanced features of the digital controller To define the pump control settings. This chapter gives an overview and a brief functional description of the screens provided by the different menus. In the following chapter, you will find how you can set up and configure the unit using the To define the schedule timer. - Page 11 Safeties menu Info menu The "safeties" menu provides useful information for trouble shooting To consult time and date information. purposes. The following screens contain basic information. To consult information about the unit safety which caused the shutdown. To consult additional information about the unit such as the unit type and the refrigerant used.
- Page 12 Defining and activating the control mode To check the status of the fanspeed relays circuit 2 (only The unit is equipped with a thermostat which controls the cooling EWAD240~340). capacity of the unit. Three different control modes exist: To check the status of the pump, the manual control mode: the operator controls the capacity alarm and the evaporator heater voltage himself -...
- Page 13 Defining the pump control settings Defining the floating setpoint settings screen of the user settings menu allows the user screen of the user settings menu allows to define the pump-leadtime and pump-lagtime. the active setpoint to be modified in function of the ambient. The source and settings of the floating setpoint can be configured by the : used to define the time that the pump must run user.
- Page 14 Tasks of the timers menu • : The unit is considered as a unit and its function is then also simular to a unit defined as , but this Checking the actual value of the software timers unit however, will only come into operation if: another unit is in alarm another unit is in mode...
- Page 15 Tasks of the safeties menu Tasks of the input/output menu Listing activated safeties and checking the unit status Checking the status of the inputs and outputs If the alarm buzzer is activated and the user presses the p key, the The input/output menu provides a means of checking the status of controller automatically enters the safeties menu.
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Page 16: Troubleshooting
The changeable analog inputs are: Overview of safety messages : indicates the status of the analog input Message safety menu Symptom : indicates the status of the analog input : indicates the status of the analog input : indicates the status of the analog input To check the inputs and outputs, proceed as follows: Enter the . - Page 17 Symptom 4: The circuit does not start up Symptom 5.4: Fan thermal protector is activated OSSIBLE CAUSES ORRECTIVE ACTION OSSIBLE CAUSES ORRECTIVE ACTION One of the following safety devices is Check on the controller and refer to Mechanical failure (fan is blocked). Check that the fan rotates freely.
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Page 18: Maintenance
Maintenance activities Symptom 7: Unit runs continuously and the water temperature remains higher than the temperature set on the controller OSSIBLE CAUSES ORRECTIVE ACTION The wiring and power supply must be checked by a licensed electrician. The temperature setting on the Check and adjust the temperature controller is too low. - Page 19 NNEX NNEX Thermostat parameters Schedule timer example Inlet water temperature control MARCH The figure below shows the thermostat diagram in case of inlet water temperature control. Fast load up Slow load up No action Slow load down To come to the schedule above following settings have to be made: Fast load down Setpoint The default value and the upper and lower limits of the thermostat...
- Page 20 NNEX NNEX Floating setpoint working Free cooling working The diagram and table below show the default value and the upper Free cooling on ambient temperature and lower limits of the floating setpoint parameters on the evaporator. Max, value free cooling state 5°C ambient temperature °C...
- Page 21 V - S NNEX OFTWARE STRUCTURE EWAD120~340MBYNN Operation manual Packaged air-cooled water chillers 4PW22683-1...
- Page 22 Zandvoordestraat 300, B-8400 Oostende, Belgium 4PW22683-1...
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