Daikin WGZ030DW Installation, Operation And Maintenance Manual
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Daikin WGZ030DW Installation, Operation And Maintenance Manual

Water-cooled scroll compressor chillers
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Installation, Operation,
and Maintenance Manual
Water-Cooled Scroll Compressor Chillers
WGZ030DW - WGZ200DW, Packaged Water-Cooled Chillers
WGZ030DA - WGZ200DA, Remote Condenser Chillers
30 - 200 Tons (105 - 700 kW)
R-410A
50/60 Hz
IOM 1322
Group: Chiller
Part Number: IOM1322
Date: June 2021

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Summary of Contents for Daikin WGZ030DW

  • Page 1 IOM 1322 and Maintenance Manual Group: Chiller Part Number: IOM1322 Date: June 2021 Water-Cooled Scroll Compressor Chillers WGZ030DW - WGZ200DW, Packaged Water-Cooled Chillers WGZ030DA - WGZ200DA, Remote Condenser Chillers 30 - 200 Tons (105 - 700 kW) R-410A 50/60 Hz...

  • Page 2: Table Of Contents

    Manufactured in an ISO 9001 & ISO 14001 certified facility ©2021 Daikin Applied. Illustrations and data cover the Daikin Applied product at the time of publication and we reserve the right to make changes in design and construction at any time without notice.
  • Page 3 Document Attached: Remote piping approval Notes: The most common problems delaying start-up and affecting unit reliability are: Field installed compressor motor power supply leads too small. Questions: Contact the local Daikin sales representative*. State size, number and type of conductors and conduits installed: From Power supply to chiller * Refer to NFPA 70-2017, Article 440.35...

  • Page 5: Installation And Application Information

    WARNING Polyolester Oil, commonly known as POE oil is a synthetic oil used in many refrigeration systems, and may be present in this Daikin product. POE oil, if ever in contact with PVC/CPVC, will coat the inside wall of PVC/CPVC pipe causing environmental stress fractures. Although there is no PVC/CPVC piping in this product, please keep this in mind when selecting piping materials for your application, as system failure and property damage could result.
  • Page 6 General Description Inspection When the equipment is received, all items should be carefully Daikin Applied WGZ water chillers are designed for indoor checked against the bill of lading to be sure of a complete installations Equipment room temperature for operating and shipment.
  • Page 7 Introduction and Installation Installation Moving the Unit Refer to Lifting/Mounting weights beginning on page NOTE: Installation and maintenance are to be performed only by qualified personnel who are familiar with local The packaged unit skid option is strongly recommended for codes and regulations, and experienced with this type ease of handling and to help prevent damage if a crane is not of equipment.
  • Page 8 Introduction and Installation Placing the Unit The small amount of vibration normally encountered makes this unit particularly desirable for basement or ground floor installations where the unit can be mounted directly to the floor. The floor construction should be such that the unit will not affect the building structure, or transmit noise and vibration into the structure.
  • Page 9 Polyolester Oil, commonly known as POE oil is a synthetic oil used in many made before filling the system. refrigeration systems, and may be present in this Daikin product. POE oil, if ever in contact with PVC/CPVC, will coat the inside wall of PVC/CPVC pipe •...

  • Page 10: Water Piping

    Water Piping Figure 3: Typical Evaporator Field Water Piping (WGZ030 - WGZ130) Figure 4: Typical Evaporator Field Water Piping (WGZ150 - WGZ200) For process applications where the cooling load can change System Water Volume rapidly, additional system water volume is needed. A process example would be the quenching of hot metal objects.
  • Page 11 When glycol is added to the chilled water system for freeze protection, recognize 2. A “paddle” type flow switch is available from Daikin that the refrigerant suction pressure will be lower, cooling Applied (part number 017503300) for field mounting performance less, and water side pressure drop will be and wiring.
  • Page 12 Water Piping Condenser Water Piping Water-cooled condensers can be piped for use with cooling towers, well water, or heat recovery applications. Cooling Arrange the condenser water so the water enters the bottom tower applications must be made with consideration of freeze connection of the condenser.
  • Page 13 Refrigerant Piping Packaged Unit Refrigerant Piping panel with associated sensors and transducers. Models WGZ 150DW to 200DW have two trio-compressors (total of 6) and WGZ 030DW to 130DW have two refrigerant circuits, two a shell-and-tube evaporator. Packaged units are provided with tandem scroll compressors (total of four), a single twocircuited complete refrigerant piping and full operating refrigerant charge brazed plate evaporator, a single two-circuited watercooled...
  • Page 14 Refrigerant Piping Figure 7: Condenser Above Compressor WARNING Improper installation can cause refrigerant migration, flood back, oil loss, refrigerant line corrosion, or mechanical failures. The discharge gas valves, liquid line solenoids, filter- driers, moisture indicators, and expansion valves are all factorymounted as standard equipment with the compressor chiller.
  • Page 15 Service Form SF99006 (current version available from the local sales office) by a pressure drop in the liquid line, the pressure losses due must be submitted to Daikin Technical Response Center and reviewed at to friction and changes in static head should be kept to a least two weeks prior to beginning piping installation.
  • Page 16 Refrigerant Piping Table 4: Recommended Liquid Line Size, R-410A Table 5: Recommended Horizontal or Downflow Discharge Line Size, R-410A IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...
  • Page 17 Refrigerant Piping Relief Valve Piping The size of the discharge pipe from the pressure relief valve should not be less than the size of the pressure relief outlet The ANSI/ASHRAE Standard 15, Safety Standard for (5/8 in. flare). See Figure 9 for pipe size when combining low Refrigeration Systems, specifies that pressure relief valves side relief on compressor suction with the condenser relief...

  • Page 18: Pressure Drop Data

    Pressure Drop Data Water Pressure Drop Water flow rates should be maintained as closely as possible to job design values. The vessel flow rates must fall between the minimum and maximum values shown on the appropriate evaporator and condenser curves. Measure the water pressure drop through the vessels at field-installed pressure taps and check the flow rate using the following tables.
  • Page 19 Pressure Drop Data Table 7: WGZ-D CondenserPressure Drop Data Figure 11: WGZ-D Evaporator Pressure Drop Curves www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...
  • Page 20 Pressure Drop Data Table 8: WGZ-D Evaporator Pressure Drop Data Components Figure 12: Compressor Locations IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...

  • Page 21: Dimensions And Weights - Packaged Units

    Dimensions and Weights - Packaged Units Figure 13: WGZ030DW - 060DW (Packaged) www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...
  • Page 22 Dimensions and Weights - Packaged Units Figure 14: WGZ070DW (Packaged) IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...
  • Page 23 Dimensions and Weights - Packaged Units Figure 15: WGZ080DW - 130DW (Packaged) www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...
  • Page 24 Dimensions and Weights - Packaged Units Figure 16: WGZ150DW - 200DW (Packaged) IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...

  • Page 25: Dimensions And Weights - Condenserless Units

    Dimensions and Weights - Condenserless Units Figure 17: WGZ030DA - 060DA (Condenserless) www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...
  • Page 26 Dimensions and Weights - Condenserless Units Figure 18: WGZ070DA (Condenserless) IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...
  • Page 27 Dimensions and Weights - Condenserless Units Figure 19: WGZ080DA - 130DA (Condenserless) www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...
  • Page 28 Dimensions and Weights - Condenserless Units Figure 20: WGZ150DA - 200DA (Condenserless) (see next page for more dimensions) IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...
  • Page 29 Dimensions and Weights - Condenserless Units Figure 21: WGZ150DA - 200DA (Condenserless) (continued) www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...

  • Page 30: Lifting And Mounting Weights

    Lifting and Mounting Weights Figure 22: Lifting Locations, WGZ030-060D Packaged Table 9: Lifting Weights, WGZ030-060D Packaged Figure 23: Lifting Locations, WGZ070-130D Packaged Table 10: Lifting Weights, WGZ070-130D Packaged IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...
  • Page 31 Lifting and Mounting Weights NOTE: Refer to “Moving the Unit” on page 7 for details on transferring/lifting the unit.Do not lift unit by mounting holes in feet. Figure 24: Lifting Locations, WGZ150-200D Packaged Table 11: Lifting Weights, WGZ150-200D Packaged Figure 25: Lifting Locations, WGZ030-060D Condenserless www.DaikinApplied.com IOM 1322 •...
  • Page 32 Lifting and Mounting Weights Table 12: Lifting Weights, WGZ030-060D Condenserless Figure 26: Lifting Locations, WGZ070-130D Condenserless Table 13: Lifting Weights, WGZ070-130D Condenserless IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...
  • Page 33 Lifting and Mounting Weights Figure 27: Lifting Locations, WGZ150-200D Condenserless Table 14: Lifting Weights, WGZ150-200D Condenserless www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...
  • Page 34 Vibration Isolators It is recommended that isolators be used on all upper level Transfer the unit as indicated under Moving the Unit.“ In installations or in areas where vibration transmission is a all cases, set the unit in place and level. When spring-type consideration.
  • Page 35 Vibration Isolators Table 17: Vibration Isolator Mounting Locations (Packaged Chillers), continued Table 18: Vibration Isolator Mounting Locations (Condenserless Chillers) www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...
  • Page 36 Physical Data - Packaged Units Table 19: Physical Data - WGZ030D - WGZ040D Table 20: Physical Data - WGZ045D - WGZ055D IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...
  • Page 37 Physical Data - Packaged Units Table 21: Physical Data - WGZ060D - WGZ070D Table 22: Physical Data - WGZ080D - WGZ090D www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...
  • Page 38 Physical Data - Packaged Units Table 23: Physical Data - WGZ100D - WGZ130D Table 24: Physical Data - WGZ150D - WGZ200D IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...
  • Page 39 Physical Data - - Units Less Condenser Table 25: Physical Data - WGZ030D - WGZ040D NOTE: Condenser and field piping not included. Table 26: Physical Data - WGZ045D - WGZ055D NOTE: Condenser and field piping not included. Table 27: Physical Data - WGZ060D - WGZ070D NOTE: Condenser and field piping not included.
  • Page 40 Physical Data - - Units Less Condenser Table 28: Physical Data - WGZ080D - WGZ090D NOTE: Condenser and field piping not included. Table 29: Physical Data - WGZ100D - WGZ130D NOTE: Condenser and field piping not included. Table 30: Physical Data - WGZ150D - WGZ200D NOTE: Condenser and field piping not included.
  • Page 41 Electrical Data Electrical Notes Notes for “Electrical Data Single Point” Power: Circuit Breakers 1. If a separate 115V power supply is used for the control The circuit breaker used in the High Short Circuit panel option circuit, then the wire sizing amps is 10 amps for all unit may have a higher trip rating than the unit Maximum Overload sizes.
  • Page 42 Electrical Data Figure 29: Field Wiring Diagram (Packaged Units) IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...
  • Page 43 Electrical Data Figure 30: Field Wiring Diagram (Units less condenser) www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...

  • Page 44: Unit Controller Operation

    Unit Configuration Unit Configuration The chiller units have two refrigerant circuits, Models WGZ 030 to WGZ 130 have two tandem scroll compressors (total of four), a single two-circuited brazed plate evaporator, a single two-circuited watercooled condenser, interconnecting refrigerant piping and a control panel with associated sensors and transducers.
  • Page 45 Unit Configuration Field Wiring Diagrams Figure 32: WGZ030DW – WGZ200DW Field Wiring Diagram (Packaged Unit) www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...
  • Page 46 Unit Configuration Figure 33: WGZ030DA – WGZ200DA Field Wiring Diagram (Remote Condenser) IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...
  • Page 47 Unit Configuration Control Panel Layout Figure 34: Typical Control Panel, 4-Compressor Unit NOTE: 1. Additional space provided in the upper right section for optional multiple point power connection and optional circuit breakers. NOTE: 2. Front door has a slot opening at the top for access to the MicroTech II controller for viewing display and making keypad entries without opening the panel door.
  • Page 48 Unit Controller Operation MicroTech II Controller Equipment Protection The unit is protected by alarms that shut it down and require Controller Software Version manual reset, and also by limit alarms that limit unit operation in response to some out-of-limit condition. Shut down alarms The version installed in a unit can be viewed by pressing the activate an alarm signal that can be wired to a remote device.
  • Page 49 Unit Controller Operation Inputs/Outputs Table 41: Analog Inputs C1 = Refrigerant Circuit #1, C2 = Refrigerant Circuit #2, UT = Unit, *n = Refrig. Dependent NOTE: 1. If Water Cooled = Y, then Entering Condenser. If Water Cooled = N, then Outside Ambient. NOTE: 2.
  • Page 50 Unit Controller Operation Table 43: Digital Inputs The following parameters are digital inputs to this controller. C1 = Refrigerant Circuit #1, C2 = Refrigerant Circuit #2, UT = Unit, *n = Refrigerant Dependent Description Type Signal Signal Unit OFF Switch 0 VAC (Stop) 24 VAC (Auto) Pump Down Switch #1...
  • Page 51 Unit Controller Operation Description Type Load Output OFF Output ON Motor Control Relay #3 = Compr#3 Starter Compressor OFF Compressor ON Condenser Fan #3– Water Cooled =N /Tower Fan Fan Contactor Fan OFF Fan ON #2-Water Cooled=Y Motor Control Relay #5 = Compr#5 (R134a,R410A) Starter Compressor OFF Compressor ON...
  • Page 52 The PW (password) column indicates the password level that must be active in order to change the setpoint. Passwords are as follows: O = Operator [0100] M = Manager [2001] Table 45: Setpoints (setpoints with * are set at Daikin Applied factory) IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...
  • Page 53 Unit Controller Operation NOTE: Temperature sensor SO 5 is Condenser Entering water sensor when Water Cooled = ON and Outdoor Air sensor when Water Cooled = OFF. www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...
  • Page 54 Unit Controller Operation Automatic Adjusted Limits Dynamic Defaults The following are set points that will be limited based on the Some set points will have a particular default value loaded option selected. when another setting is changed. Evaporator Leaving Water Temperature Refrigerant Dependent Defaults Mode Refrigerant Type...
  • Page 55 Unit Controller Operation Low Evaporator Pressure If active via trigger condition 1: When the alarm occurs due to this trigger, it can auto reset Alarm description (as shown on screen): the first two times each day, with the third occurrence being Evap Press Low Cir N manual reset.
  • Page 56 Unit Controller Operation Phase Voltage Protection Action Taken: Normal stop all circuits Reset: This alarm can be cleared manually via the keypad, but Alarm description (as shown on screen): only if the sensor is back in range. Phase/Voltage Cir N Suction Temperature Sensor Fault Trigger: PVM input is low and Phase Voltage set point = enable.
  • Page 57 Unit Controller Operation No Pressure Change at Start Low Evaporator Pressure - Hold Event description (as shown on screen): Alarm description (as shown on screen): Evap Press Low HoldN NoPressChgAtStartN Trigger: Trigger: Circuit has failed twice on a No Pressure Change at Start Condition.
  • Page 58 Unit Controller Operation Suction Temperature Sensor Fail High Condenser Pressure - Unload Event description (as shown on screen): Event description (as shown on screen): CondPressHighUnloadN SuctT Sensor Fail N Trigger: Sensor shorted or open. Trigger: Action Taken: None. This event is triggered if all of the following are true: Reset: N/A •...
  • Page 59 Unit Controller Operation are moved down in the Event Log and the last entry is dropped In all other Unit modes the compressor staging temperatures if 25 earlier event occurrences have been logged. Each Event are calculated as shown below: Log entry includes an event description and a time and date Stage Up Temperature = Cool LWT + (Control Band/2) stamp for the event occurrence.
  • Page 60 Unit Controller Operation Reset Type = 4-20 mA Reset Type = Return (only for TGZ unit, Refrig = R134a) Cooling Mode The Active Leaving Water set point is adjusted by the 4 to 20 The Active Cooling Leaving Water set point is adjusted based mA reset analog input.
  • Page 61 Unit Controller Operation Reset is accomplished by changing the Active Heating Leaving refrigerant. Water set point from the Heat LWT set point to the value of Condenser Saturated Temperature [Heat LWT (-) Heating Maximum Reset set points] as the condenser delta temperature (leaving minus entering) varies Condenser saturated temperature shall be calculated from the from the Heating Start Reset Delta T set point towards 0ºF condenser pressure for each circuit.
  • Page 62 Unit Controller Operation Unit Test Mode Unit Off Control Source Remote Keypad Unit Input Set Point Input Entry Request Enable The unit test mode allows manual testing of controller outputs. Entering this mode requires the following conditions: • Unit Switch = OFF SWITCHES •...
  • Page 63 Unit Controller Operation Low Ambient Lockout Figure 36: Unit State Diagram This feature is only available on air cooled units (WaterCooled=Off).If the OAT drops below the low ambient lockout set point, then all running circuits will do a normal stop. Once the lockout has been triggered, no compressors will start until the OAT rises to the lockout set point plus 5°F.
  • Page 64 Unit Controller Operation Primary/Standby Pump Staging Fantrol The pump designated as primary will start first. If the Fans 1, 3, 5, 7, 9, 11 are for circuit #1, and fans 2, 4, 6, 8, 10, evaporator state is start for a time greater than the recirculate 12 are for circuit 2.
  • Page 65 Unit Controller Operation Normal Operation – Staging Up Condenser Pump and Tower Control – Water Cooled At startup, the first fan will start when the saturated condenser temperature rises above the target. After this, the stage up Condenser pump and cooling tower control logic requires that deadbands apply.
  • Page 66 Unit Controller Operation Primary/Standby Pump Staging Tower Fans The pump designated as primary will start first. If the Tower fan control is active when the unit is set up as condenser state is start for a time greater than the re-circulate water cooled (WaterCooled=On), Tower Control is set to timeout set point and there is no flow, then the primary Temperature, and the condenser pump is in the RUN state.
  • Page 67 Unit Controller Operation Initial Valve Position Number Of Fans ON Active Set Point When the condenser pump is not in the RUN state, the valve Valve Set Point output will be set as a function of entering condenser water Stage #1 ON temperature (ECWT)) per the following graph.
  • Page 68 Unit Controller Operation Stage Down Now is in a low OAT start state for a time equal to the Low OAT Start Time set point. During Low OAT Starts, the freezestat The Stage Down Now flag is set based on the following tests: logic and low evaporator pressure events are disabled.
  • Page 69 Unit Controller Operation allowed to decrease below this value and circuit number one is Description Low Evap Press Time Requirement to continue again allowed to load up. Check #1 15 seconds after start Evap Press >(0.48*Low Evap Press SP) Again its condenser pressure exceeds the High Condenser Check #2 30 seconds after start Evap Press >(0.66*Low Evap Press SP)
  • Page 70 Unit Controller Operation Network Limit Low Ambient Lockout (Water Cooled = NO Only) The maximum unit capacity can be limited by a network signal. This function is only enabled if the unit control source is set If the OAT drops below the low ambient lockout set point, then to network.
  • Page 71 Unit Controller Operation Using the Controller The hot gas bypass valve opening will be delayed for Hot Gas Bypass Time set point seconds (the default is 30 seconds) Getting Started when the first compressor starts on each circuit. There are two basic procedures to learn in order to utilize the MicroTech II controller: EXV Control •...
  • Page 72 Unit Controller Operation Unit Controller Operation MENU Key 6. Use the ARROW keys (now in the edit mode as shown above) to change the setting. The MENU key is used to switch between the shortcut method 7. When the desired value is achieved, press ENTER to (known as the MENU mode and as shown in Figure 8) and enter it and also move the cursor down.
  • Page 73 Unit Controller Operation Menu Descriptions Unit states can be OFF, COOL, GYLCOL, ICE, or ALARM as determined from the Unit Mode setpoint, This section contains information on each screen. The menu screens are in order of the matrix in Figure 10 going from left the Unit Enable, and the presence of an alarm.
  • Page 74 Unit Controller Operation This menu gives the status of digital inputs (D.I.), 1=ON, 0=OFF. Numbers are 1 through 18. See Table 5 on page 19 for number reference. The difference between the three screens above is that water- cooled units and the TGZ units will give the entering condenser water temperature and air-cooled units will give the outside air temperature (OAT).
  • Page 75 Unit Controller Operation www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...
  • Page 76 Unit Controller Operation IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...
  • Page 77 Unit Controller Operation The first Stages ON value is the number of fan stages ON. The second number is the Tower Stages setpoint (0 if Tower Control = None). This screen shows the number of tower fans “on” for each circuit. This screen will show the fans “on” whether they are actually connected to and controlled by the MicroTech II controller or not.
  • Page 78 Unit Controller Operation Water Cooled = Y Only or Either type alarm will light a red light in back of the LEFT- ARROW KEY. The light will go out when the fault is cleared. TGZ Unit (R134a) To clear the fault, scroll down to the last screen and press ENTER.
  • Page 79 Unit Controller Operation • ICE w/GLYCOL, used with ice storage systems, Water-Cooled = OFF allows changing from chilled glycol operation to lower SET UNIT SPs temperature ICE operation. In ICE, the unit runs at full Water Cooled = Off load until the ICE setpoint is reached, at which time the unit shuts off.
  • Page 80 Unit Controller Operation WGZ Unit (R410A) SET UNIT SPs (11) SET UNIT SPs (16) Evap Press Sensor Clg ResType = X Cir 1 Offset XX.X psi Cir 2 Offset XX.X psi Clg MaxRes = XX.X ºF TGZ Unit (Refrig = 134a) The pressure offsets on menus 11 and 12 and the temperature offsets on menus 10, 11 and 12 correct the controller’s display SET UNIT SPs (16)
  • Page 81 Unit Controller Operation This screen can be accessed either through the SET OTHER # of Compressors = 6 menu or by simply pressing the ENTER key while on one of SET COMP SPs (4) the SET screens. The controller will automatically go from the screen with the setting change to this screen.
  • Page 82 Unit Controller Operation Set Air-Cooled Condenser Fans The last action to take place is the shutoff of all compressors running when the LowEvPrStop setting is reached (default is Water-cooled = Off 58 psi). Reducing these time intervals will increase detrimental compressor cycling.
  • Page 83 Unit Controller Operation Condenser pump state Stage ON Temp is the entering condenser water temperature ECWT OR Lift pressure (ECWT) that will turn on tower fan #1 and #2. Default settings Stage up and stage down timer values are 70°F and 75°F. Cold condenser water will improve unit Tower setpoints (Tower Control, Tower Stages, Stage Up Time, efficiency but too cold can cause erratic operation.
  • Page 84 Unit Controller Operation When the Error is > the Valve Deadband setpoint, the valve Operation After Start position analog output (% of full scale) is updated according to When the condenser pump is in the RUN state, the valve the following equation. output shall be controlled in one of two modes as specified New %Position = Old %Position + Increment/10 by the Valve/VFD Control setpoint.
  • Page 85 Unit Controller Operation R410A Water Cooled = OFF TEST UNIT (1) TEST UNIT (5) Alarm Signal =OFF Fan 2=OFF Fan 4=OFF Evap Pump 1 = OFF Fan 6/8=OFF Evap Pump 2 = OFF Fan 10=OFF # of Compressors = 4 TEST UNIT (6) EXV Cir 1= XXX.X % TEST UNIT (2)
  • Page 86 Unit Controller Operation Security Two four-digit passwords provide OPERATOR and MANAGER levels of access to changeable parameters. Either password can be entered using the ENTER PASSWORD screen which can be accessed either through the SET OTHER menu or by simply pressing the ENTER key while on one of the SET screens.
  • Page 87 Unit Controller Operation Parameter Details Units of Measure Parameters will be expressed in different units dependant on the protocol selected. Parameter Modbus BACnet LONworks Type Units Units Units Temperature °F X 10 °F X 10 °C X 100 Pressure PSI X 10 PSI X 10 KPa X 10 Percentage...
  • Page 88 Unit Controller Operation Chiller Mode Applies to Integer 17 and Integer 19. Network Chiller Mode Set Point and Active Chiller Mode use the same numbering scheme to represent ice mode or cool mode. The output representing the mode is shown below for each protocol. Mode LONworks BACnet...
  • Page 89 Unit Controller Operation timer should lapse, then the “ignore network defaults” setting is checked. If this is set low, then the defaults for BAS cool set point, network limit, unit enable, and unit mode will be loaded. If the setting is set high, then no defaults are loaded and the status of the BAS enable set point is restored to the original value.
  • Page 90 Unit Controller Operation Compressor Motor Protection Module Warning Codes (Green LED Flash Code) • Code 1 – Loss of Communication: The module will flash The 20, 26, and 30 HP compressors are equipped with an the green Warning LED one timeindicating the module module that provides protection against: has not communicated with the master controller for •...
  • Page 91 Unit Controller Operation circuit is higher than 5.1K Ohms. The module will lockout When three-phase power has been applied, the input relay the compressor if the number of Code 4 Alerts exceeds the should close and the “run light” should come on. If the relay user configurable number of Code 4 events within a 24 hour does not close, perform the following tests.

  • Page 92: Startup And Shutdown Procedures

    Form” on page 105 within 10 working days to 14. Start-up Daikin Applied as instructed on the form to obtain full warranty benefits. (both included below but modeled 1. Open the compressor discharge shutoff valves until from the WWV IOM) backseated.
  • Page 93 Startup and Shutdown Procedures Weekend or Temporary Shutdown Start-up after Extended Shutdown Move pumpdown switches PS1 and PS2 to the “manual 1. Inspect all equipment to see that it is in satisfactory pumpdown” position. After the compressors have pumped operating condition. down, turn off the chilled water pump.
  • Page 94 The thermal dispersion flow switch supplied by Daikin Applied, NOTE: DO NOT alter or relocate factory installed flow shown in Figure 1, comes as a 2 part unit consisting of a flow switches.
  • Page 95 Startup and Shutdown Procedures Step 2: Once steady state minimum desired operating flow is obtained, perform the ‘Teach’ function on the flow switch. The ‘Teach’ function is initiated by holding down the minus ‘-’ button on the face of the flow switch for 15 seconds. During this 15 second period, LEDs ‘0’...
  • Page 96 Startup and Shutdown Procedures In Step 3, the ‘Teach’ function re-adjusted the flow switch set Figure 49: Display for Flow Below Range point (SP) while flow was at the minimum desired operating flow. The chiller will not operate at this flow because the flow switch is OPEN after performing the ‘Teach’...

  • Page 97: Sequence Of Operation

    Sequence of Operation Sequence of Operation If the LWT stays above 41.5°F, all of three (or 5) remaining compressors will eventually stage on after the Stage Up Timer The following sequence of operation is typical for WGZ water times out between each stage. chiller models.
  • Page 98 Sequence of Operation Figure 52: Staging in Cool and Glycol Mode Automatic Pump Down WGZ units are equipped with single pumpdown control. When Description Occurs When: Action Taken the last compressor running on either circuit is ready to shut Stage #1 ON Lvg Evap T >...
  • Page 99 Sequence of Operation Condenser Fan Control Model AC chillers equipped with air-cooled or evaporative-cooled condensers usually require some form of discharge pressure control. The MicroTech II controller can be programmed to provide this function by cycling condenser fans based on the unit discharge pressure.

  • Page 100: Unit Maintenance

    For more details in the compressor’s equalizing line or on the compressor itself on acceptable oil types, contact your Daikin Applied service Low oil level can cause inadequate lubrication and if oil must be added, use oils referred to in the following Compressor representative.
  • Page 101 Unit Maintenance NOTE: These types of oils can only be used as “Top Off” oils. conditions, phase loss, under/over voltage, and phase reversal. Oil can be added to the compressor through the oil fill Whenever any of these conditions occur, an input relay is hole in the crankcase.
  • Page 102 Unit Maintenance Turn the screw clockwise (when viewed from the adjustment DANGER screw end) to increase the superheat and counterclockwise to LOCKOUT/TAGOUT all power sources prior to servicing the unit. reduce superheat. Allow time for system rebalance after each Disconnect all power before performing any service inside the unit or superheat adjustment.
  • Page 103 Maintenance Schedule www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...

  • Page 104: Troubleshooting Chart

    Troubleshooting Chart IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...

  • Page 105: Warranty Registration Form (Scroll)

    Warranty Registration Form (Scroll) www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...
  • Page 106 Warranty Registration Form (Scroll) IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...
  • Page 107 Warranty Registration Form (Scroll) www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...
  • Page 108 Warranty Registration Form (Scroll) IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...
  • Page 109 Warranty Registration Form (Scroll) www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...
  • Page 110 Warranty Registration Form (Scroll) IOM 1322 • WATER-COOLED SCROLL COMPRESSOR www.DaikinApplied.com...

  • Page 111: Limited Product Warranty

    Limited Product Warranty www.DaikinApplied.com IOM 1322 • WATER-COOLED SCROLL COMPRESSOR...
  • Page 112 Daikin Applied Training and Development Now that you have made an investment in modern, efficient Daikin equipment, its care should be a high priority. For training information on all Daikin HVAC products, please visit us at www.DaikinApplied.com and click on Training, or call 540-248-9646 and ask for the Training Department.

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