Daikin EWAD TZ-B Operation Manual

Also see for EWAD TZ: Installation, operation and maintenance Installation, operation and maintenance manual

Contents

Daikin EWAD TZ-B Operation Manual Manual pdf 10 page image

Air and Water cooled inverter chillers and heat pumpD-EOMZC00105-17ENOperation Manual10/84EWAD TZ - EWAD TZ B -EWWD VZAir and Water cooled inverter chillers andheat pump1.5 Available Controls1.5.1 Evaporator pumpsThe controller can regulate one or two evaporator pumps and takes care of automatic change-over betweenpumps. It’s also possible to prioritize the pumps and temporarily disable one of the two. The controller is alsoable to control the pump speeds if the pumps are equipped with inverters.1.5.2 Condenser pumps (W/C units only)The controller can regulate one or two condenser pumps and takes care of automatic change-over betweenpumps. It’s also possible to prioritize the pumps and temporarily disable one of the two.1.5.3 CompressorsThe controller can regulate one or two compressors installed on one or two independent refrigerant circuit (onecompressor per circuit). All the safeties of each compressor will be managed by the controller. Embeddedinverter safeties are handled by the inverter onboard electronic and only notified to the UC.1.5.4 Expansion ValveThe controller can regulate an electronic expansion valve per each refrigerant circuit. Microtech® III embeddedlogic will always guarantee the best operation for the refrigerant circuit.1.5.5 Switchbox Pressurization fan for HFO units (W/C only)In case of water cooled units which are installed in plant rooms it’s required to pressurize the switchbox toavoid refrigerant accumulation that could lead to dangerous operations of the unit. To avoid this apressurization fan will maintain a constant air circulation inside the switchbox. This fan will be always runningwhen the internal temperature will exceed 23°C. Any drop in the delta pressure between the inside and theambient will generate a stop of the unit to re-establish a safe condition for the users.1.6 Customer Terminal Block ConnectionsThe contacts below are available at the user’s terminal block referred as MC24 or MC230 in the wiring diagram.The following table summarizes the connections at the user’s terminal block.DescriptionTerminalsEWADTZTerminalsEWADTZ BTerminalsEWWDVZNotesEvaporator Flow Switch (mandatory) 708, 724 708, 724 708, 724 24 Vdc digital inputCondenser Flow Switch - - 888, 890 24 Vdc digital inputDouble setpoint 703, 728 703,728 703, 728 24 Vdc digital inputCurrent limit enable 884, 885 885, 891 - 24 Vdc digital inputExternal Fault 881,884 881, 884 542, 501 24 Vdc digital inputRapid Restart Enable (optional) 764, 765 - 764, 765 24 Vdc digital inputBack-up chiller (optional) 764, 763 - - 24 Vdc digital inputLOC/BMS selection (optional) 894, 895 881-1, 834 894, 895 24 Vdc digital inputOn-Off Remote 540, 541 540, 541 703, 749 230 Vac digital inputHeat/Cool Remote - - 892, 893Leak Detector Output - - 552, 553General Alarm 525, 526 525, 526 525, 526 NO digital output (24…230 Vac ext supply)Compressor #1 status 512, 513 512, 513 - NO digital output (24…230 Vac ext supply)Compressor #2 status 514, 515 514, 515 - NO digital output (24…230 Vac ext supply)Alarm Circuit #1 (optional) 560, 561 892, 896 564, 565 NO digital output (24…230 Vac ext supply)Alarm Circuit #2 (optional) 560, 562 894, 899 565, 566 NO digital output (24…230 Vac ext supply)Evaporator Pump #1 start 806, 805 501, 530 527, 528 NO digital output (24 Vdc internal supply)Evaporator Pump #2 start 806, 807 501, 531 559, 560 NO digital output (24 Vdc internal supply)Condenser Pump #1 start - - 550, 551 NO digital output (24 Vdc internal supply)Condenser Pump #2 start - - 559, 562 NO digital output (24 Vdc internal supply)Demand Limit 888, 889 888, 889 887, 889 4-20 mA analog inputCurrent Limit (optional) 886, 890 887, 886 - 4-20 mA analog inputSetpoint Override 886, 887 890, 886 886, 887 4-20 mA analog inputPump VFD Signal (optional) 882, 883 - -