Daikin AGZ 140D- Manuals

Page 2 - Table of Contents; MicroTech; Our facility is; ISO Certified

2 AGZ 025D through 190D OMM 1166 Table of Contents Introduction ........................................3 Operating/Standby Limits ............................ 9 Pressure Drop Curves ........................9 Minimum Allowable Flow Rates ................. 9 Pressure Drop Curves ........................

Page 3 - Introduction; General Description; NOTE: Vintage changes; this manual covers; Nomenclature; A G Z - XXX D H; Hazard Identification Information; CAUTION

OMM 1166 AGZ 025D through 190D 3 Introduction General Description NOTE: Vintage changes ; this manual covers Revision 0A to the original AGZD version “00”. The units are very close in appearance but can be differentiated by their nameplate. Version OO name plate is AGZ……….E10 Revision OA nameplate i...

Page 4 - Standard/High Ambient Panels; units for high ambient operation (105; Water Flow Limitations; Variable Speed Pumping; Daikin

4 AGZ 025D through 190D OMM 1166 Ambient Air Temperature Limitations Standard/High Ambient Panels The maximum operating ambient temperature for standard units is 104 ° F (40 ° C). AGZ-D units for high ambient operation (105 ° F to 125 ° F maximum) require the addition of the High Ambient Control Pan...

Page 5 - Glycol Solutions; Capacity; Flow; Pressure drop; Pressure Drop; Power; Power; Table 2, Ethylene Glycol Factors for Models AGZ 025D to 130D

OMM 1166 AGZ 025D through 190D 5 Glycol Solutions The use of a glycol/water mixture in the evaporator to prevent freezing reduces system capacity and efficiency, as well as increase pressure drop. The system capacity, required glycol solution flow rate, and pressure drop with glycol may be calculate...

Page 6 - Altitude Correction Factors

6 AGZ 025D through 190D OMM 1166 Table 4, Ethylene Glycol Factors for Models AGZ 140D to 190D % E.G. Freeze Point Capacity Power Flow PD o F o C 10 26 -3.3 0.994 0.998 1.038 1.101 20 18 -7.8 0.982 0.995 1.063 1.224 30 7 -13.9 0.970 0.992 1.095 1.358 40 -7 -21.7 0.955 0.987 1.134 1.536 50 -28 -33.3 0...

Page 7 - Table 6, Capacity and Power Derates, Models AGZ 025D to 130D

OMM 1166 AGZ 025D through 190D 7 Table 6, Capacity and Power Derates, Models AGZ 025D to 130D Altitude Chilled Water Delta T Fouling Factor 0.0001 (0.0176) 0.00025 (0.044) 0.00075 (0.132) 0.00175 (0.308) °F °C Cap. Power Cap. Power Cap. Power Cap. Power Sea Level 6 3.3 0.978 0.993 0.975 0.991 0.963 ...

Page 8 - Table 7, Capacity and Power Derates, Models AGZ 140D to 190D; Evaporator Freeze Protection

8 AGZ 025D through 190D OMM 1166 Table 7, Capacity and Power Derates, Models AGZ 140D to 190D Altitude Chilled Water Delta T Fouling Factor 0.0001 (0.0176) 0.00025 (0.044) 0.00075 (0.132) 0.00175 (0.308) °F °C Cap. Power Cap. Power Cap. Power Cap. Power Sea Level 6 3.3 0.990 0.997 0.976 0.994 0.937 ...

Page 9 - Operating/Standby Limits; Pressure Drop Curves; Minimum Allowable Flow Rates; Constant-Chilled Water Flow Systems; full load

OMM 1166 AGZ 025D through 190D 9 automatic through the ambient sensing thermostat that energizes the evaporator heater cable for protection against freeze-up. Unless the evaporator is drained in the winter, the disconnect switch to the evaporator heater must not be open. Operating/Standby Limits • M...

Page 12 - Figure 2, Typical Field Control Wiring

12 AGZ 025D through 190D OMM 1166 Figure 2, Typical Field Control Wiring

Page 13 - Controller Section Table of Contents; Unit Capacity Overrides.........................................................................27

OMM 1166 AGZ 025D through 190D 13 MicroTech  III Controller Controller Section Table of Contents Overview ........................................................................................................................14 Controller Inputs and Outputs ...........................................

Page 14 - Overview; current unit status; Controller Inputs and Outputs; Main Controller; Table 9, Analog Inputs; Table 10, Analog Outputs

14 AGZ 025D through 190D OMM 1166 Overview The MicroTech® III controller’s state-of-the-art design not only permits the chiller to run more efficiently, but also can simplify troubleshooting if a system failure occurs. Every MicroTech IIII controller is programmed and tested prior to shipment to fac...

Page 15 - Table 12, Digital Outputs; Compressor Module 1; Compressor Module 2; Analog Inputs; Note; open, MHP Switch input will also be open.

OMM 1166 AGZ 025D through 190D 15 Table 12, Digital Outputs Description Output Off Output On DO1 Evaporator W ater Pump 1 Pump Off Pump On DO2 Alarm Indicator Alarm Not Active Alarm Active DO3 Circuit 1 Fan Output 1 Fan(s) Off Fan(s) On DO4 Circuit 1 Fan Output 2 Fan(s) Off Fan(s) On DO5 Circuit 1 F...

Page 16 - Actuator Information; Daikin Applied; Setpoints; Default

16 AGZ 025D through 190D OMM 1166 Digital Outputs Description Output Off Output On DO1 Compressor #2 Compressor Off Compressor On DO2 Compressor #4 Compressor Off Compressor On DO3 Compressor #6 Compressor Off Compressor On DO5 Circuit 2 Hot Gas Bypass SV Solenoid Closed Solenoid Open DO6 Circuit 2 ...

Page 17 - Unit Level Setpoints:

OMM 1166 AGZ 025D through 190D 17 Unit Level Setpoints: Description Default Range Mode/Enabling Unit Enable Enable Disable, Enable Network Unit Enable Disable Disable, Enable Control source Local Local, Network Available Modes Cool Cool, Cool w/Glycol, Cool/Ice w/Glycol Ice, Test Network Mode Comman...

Page 19 - Auto Adjusted Ranges; Special Set Point Operations; Available Modes

OMM 1166 AGZ 025D through 190D 19 Auto Adjusted Ranges Some settings have different ranges of adjustment based on other settings: Cool LWT 1, Cool LWT 2, and Network Cool Set Point Available Mode Selection Range W ithout Glycol 4.4 to 15.6 °C (39.9 to 60.1 °F) W ith Glycol -9.5 to 15.6 °C (14.9 to 6...

Page 20 - Security; Entering Passwords; Passwords are entered on the first screen on the unit controller,; Editing Setpoints; Unit Functions; Definitions; LWT Slope; LWT – LWT target

20 AGZ 025D through 190D OMM 1166 Security All setpoints are protected using passwords. A four-digit password provides operator access to changeable parameters. Service level passwords are reserved for authorized service personnel. . Operator password: 5321 Entering Passwords Passwords are entered o...

Page 21 - The Control Band is calculated as follows:; Staging Temperatures; If the unit is configured for use without glycol:; Unit Enable; Unit is enabled according to the following table

OMM 1166 AGZ 025D through 190D 21 Unit Capacity For applying unit capacity limits, an estimate of total unit capacity is needed. Unit capacity will be based on the estimated circuit capacities. The unit capacity is the number of compressors running (on circuits that are not pumping down) divided by ...

Page 22 - Unit Mode Selection; Unit Mode is set according to the following table:; Glycol Configuration; Unit States; The unit will always be in one of three states:

22 AGZ 025D through 190D OMM 1166 Unit Mode Selection The operating mode of the unit is determined by setpoints and inputs to the chiller. The Available Modes Set Point determines what modes of operation can be used. This set point also determines whether the unit is configured for glycol use. The C...

Page 24 - Evaporator Pump Control; Start – Pump is on, water loop is being recirculated.; Requires any of the following

24 AGZ 025D through 190D OMM 1166 Enum Status Conditions 6 Off:Keypad Disable Unit State = Off and Unit Enable Set Point = Disable 7 Off:Remote Switch Unit State = Off and Remote Switch is open 8 Off:BAS Disable Unit State = Off, Control Source = Network, and BAS Enable = false 9 Off:Unit Switch Uni...

Page 25 - Auto Control; LWT Target

OMM 1166 AGZ 025D through 190D 25 T3 – Run to Off Requires all of the following • Unit state is Off • LWT is higher than the Evap Freeze set point or LWT sensor fault is active T4 – Start to Off Requires all of the following • Unit state is Off • LWT is higher than the Evap Freeze set point or LWT s...

Page 26 - Unit Capacity Control; Compressor Staging in Cool Mode; Stage Up Delay

26 AGZ 025D through 190D OMM 1166 Local OFF COOL/ICE w/Glycol Cool Set Point 1 Local ON COOL/ICE w/Glycol Ice Set Point Network COOL COOL/ICE w/Glycol BAS Cool Set Point Network ICE COOL/ICE w/Glycol BAS Ice Set Point Local ICE w/Glycol Ice Set Point Network ICE w/Glycol BAS Ice Set Point Leaving Wa...

Page 27 - Staging Sequence; Next To Start; Unit Capacity Overrides; Demand Limit

OMM 1166 AGZ 025D through 190D 27 Compressor Staging in Ice Mode The first compressor on the unit should be started when evaporator LWT is higher than the Startup Temperature. Additional compressors should be started as quickly as possible with respect to the Stage Up Delay. The unit should shut dow...

Page 28 - Network Limit

28 AGZ 025D through 190D OMM 1166 Four Compressors: Demand Limit Signal (%) Demand Limit (mA) Stage Limit Limit ≥ 75% Limit ≥ 16 mA 1 75% > Limit ≥ 50% 16 mA > Limit ≥ 12 mA 2 50% > Limit ≥ 25% 12 mA > Limit ≥ 8 mA 3 25% > Limit 8 mA > Limit 4 Six Compressors: Demand Limit Signal (...

Page 29 - Circuit Functions; Evaporator Approach = LWT – Evaporator Saturated Temperature; Circuit Control Logic

OMM 1166 AGZ 025D through 190D 29 Circuit Functions Definitions Refrigerant Saturated Temperature • Refrigerant saturated temperature shall be calculated from the pressure sensor readings for each circuit. Evaporator Approach The evaporator approach shall be calculated for each circuit. The equation...

Page 31 - Pumpdown Procedure; Turn off hot gas output and liquid line output; Low Ambient Starts; Compressor Control

OMM 1166 AGZ 025D through 190D 31 Pumpdown Procedure Pumpdown is performed as follows: • If multiple compressors are running, shut off the appropriate compressors based on sequencing logic and leave only one running • Turn off hot gas output and liquid line output • Keep running until evaporator pre...

Page 32 - A compressor should be turned off if any of the following occur:; Cycle Timers; Condenser Fan Control; Fan Staging

32 AGZ 025D through 190D OMM 1166 Starting a Compressor A compressor should start if it receives a start command from the unit capacity control logic. Stopping a Compressor A compressor should be turned off if any of the following occur: • Unit capacity control logic commands it off • An unload alar...

Page 33 - Four stage down dead bands shall be used.; VFD; VFD State

OMM 1166 AGZ 025D through 190D 33 Condenser Target A condenser target should be selected from the setpoints based on the number of compressors on the unit and the number of compressors running. Each stage of capacity on a circuit will use a different condensing target set point. A minimum condenser ...

Page 34 - EXV Control; EXV Position Range; Manual Control

34 AGZ 025D through 190D OMM 1166 EXV Control Auto Control Any time the circuit is not in the run state, the EXV position should be 0. The EXV control state should display that the EXV state is closed when this is the case. While a circuit is in the run state, the EXV should go into superheat contro...

Page 35 - Alarms; Evaporator Flow Loss

OMM 1166 AGZ 025D through 190D 35 Liquid Line Solenoid Valve The liquid line solenoid output should be on when the circuit state is either Pre-open or Run. This output should be off at all other times. Hot Gas Bypass Solenoid Valve This output shall be on when circuit state is Run and one compressor...

Page 37 - Unit Problem Alarms; Low Ambient Lockout (No longer an alarm from version 251699201 on)

OMM 1166 AGZ 025D through 190D 37 Reset: This alarm can be cleared manually via the keypad or BAS command when communication between main controller and the extension module is working for 5 seconds. EXV Module 1 Comm Failure Trigger: Expansion Valve Type = Electronic and c ommunication with the I/O...

Page 38 - Unit Warning Alarms; External Event; Circuit Fault Alarms; Low Evaporator Pressure

38 AGZ 025D through 190D OMM 1166 Unit Warning Alarms External Event Trigger: External Alarm/Event input is open for at least 5 seconds and external fault is configured as an event. Action Taken: None . Reset: Auto clear when digital input is closed. Bad Demand Limit Input Trigger: Demand limit inpu...

Page 39 - Freeze time; High Condenser Pressure

OMM 1166 AGZ 025D through 190D 39 Freezestat logic allows the circuit to run for varying times at low pressures. The lower the pressure, the shorter the time the compressor can run. This time is calculated as follows: Freeze error = Low Evaporator Pressure Unload – Evaporator Pressure Freeze time = ...

Page 40 - Circuit Events; Low Evaporator Pressure - Hold

40 AGZ 025D through 190D OMM 1166 No Pressure Change After Start Trigger: After start of compressor, at least a 7 KPA (1 PSI) drop in evaporator pressure OR 35 KPA (5.1 PSI) increase in condenser pressure has not occurred after 30 seconds. The actual alarm will not be triggered until the second occu...

Page 41 - Circuit Warning Alarms; Failed Pumpdown; Events

OMM 1166 AGZ 025D through 190D 41 Low Evaporator Pressure - Unload Trigger: This event is triggered if all of the following are true: • circuit state = Run • more than one compressor is running on the circuit • evaporator pressure <= Low Evaporator Pressure - Unload set point for a time greater t...

Page 42 - Unit Events; Unit Power Restore

42 AGZ 025D through 190D OMM 1166 Unit Events Unit Power Restore Trigger: Unit controller is powered up. Action Taken: none. Reset: none. Circuit Events Low Evaporator Pressure - Hold Trigger: This event is triggered if all of the following are true: • circuit state = Run • evaporator pressure <=...

Page 43 - Alarm Logs; NOTE; refer to; Active Alarms; Clearing Alarms

OMM 1166 AGZ 025D through 190D 43 Action Taken: Stage off one compressor on the circuit every 10 seconds while condenser pressure is higher than the unload set point, except the last one. Inhibit staging more compressors on until the condition resets. Reset: While still running, the event will be re...

Page 44 - Using the Controller; Figure 3, Unit Controller; The left most position of the title line includes an “up” arrow

44 AGZ 025D through 190D OMM 1166 Using the Controller Figure 3, Unit Controller The keypad/display consists of a 5-line by 22-character display, three buttons (keys) and a “push and roll” navigation wheel. There is an Alarm Button, Menu (Home) Button, and a Back Button. The wheel is used to navigat...

Page 45 - Navigating; Passwords; Enter passwords from the Main Menu:; Password Entry Page

OMM 1166 AGZ 025D through 190D 45 When the cursor is on a line the highlights will look like this: If line contains a changeable value> If the line contains status-only information> Or a line in a menu may be a link to further menus. This is often referred to as a jump line, meaning pushing th...

Page 46 - Navigation Mode; Figure 6; Edit Mode; Example 1

46 AGZ 025D through 190D OMM 1166 Navigation Mode When the navigation wheel is turned clockwise, the cursor moves to the next line (down) on the page. When the wheel is turned counter-clockwise the cursor moves to the previous line (up) on the page. The faster the wheel is turned the faster the curs...

Page 47 - Menus; Screen Navigational Links:; Table 13, Menu Screens

OMM 1166 AGZ 025D through 190D 47 Example 3; Clear an Alarm, from the Main Menu scroll down to the Alarms line. Note the arrow indicating this line is a link. Press the wheel to jump to the next menu Alarms There are two lines here; Alarm Active and Alarm Log. Alarms are cleared from the Active Alar...

Page 60 - Optional Low Ambient Fan VFD; The optional VFD fan control is used for unit operation below 35; What is an Inverter?; Do not to switch off power to the inverter

60 AGZ 025D through 190D OMM 1166 Optional Low Ambient Fan VFD The optional VFD fan control is used for unit operation below 35 ° F (2 ° C) down to a minimum of -10 ° F (-23 ° C). The control looks at the saturated discharge temperature and varies the fan speed to hold the temperature (pressure) at ...

Page 62 - LCD Display; Table 16, Display Data

62 AGZ 025D through 190D OMM 1166 LCD Display Table 16, Display Data No Name Display Content 1 Operation Mode Menus MODE Displayed when in Mode Selection. MONITR Displayed when in Monitor Mode. VERIFY Indicates the Verify Menu PRMSET Displayed when in Parameter Setting Mode. A.TUNE Displayed during ...

Page 63 - Table 17, Alarm Content; Table 18, LO/RE LED and RUN LED Indictors

OMM 1166 AGZ 025D through 190D 63 Table 17, Alarm Content State Content Display Illuminated W hen the drive detects an alarm or error Flashing W hen an alarm occurs W hen an oPE is detected W hen a fault or error occurs during Auto-Tuning Off Normal operation (no fault or alarm) Table 18, LO/RE LED ...

Page 64 - Table 20 Fault Reset Methods

64 AGZ 025D through 190D OMM 1166 Table 19, Types of Alarms, Faults, and Errors Type Drive Response Faults When the drive detects a fault: • The digital operator displays text indicating the specific fault and the ALM indicator LED remains lit until the fault is reset. • The fault interrupts drive o...

Page 65 - Recommended Periodic Inspection; Table 21, Periodic Inspection Checklist; Optional BAS Interface; They can also be found and downloaded on; IM 966-1, BACnet® IP Communication Module; Communication Module; ED 15121, Protocol Information for MicroTech III chiller, Modbus

OMM 1166 AGZ 025D through 190D 65 Recommended Periodic Inspection ! WARNING Electrical Shock Hazard. Before servicing or inspection equipment, disconnect power to the unit.The internal capacitor remains charged after power is turned off. W ait at least the amount of time specified on the drive befor...

Page 66 - Startup; Shutdown

66 AGZ 025D through 190D OMM 1166 Startup Pre Start-up The chiller must be inspected to ensure no components became loose or damaged during shipping or installation. Start-Up Refer to the MicroTech III Controller section beginning on page 13 to become familiar with its operation before starting chil...

Page 67 - Extended; Front seat (close) both condenser liquid line service valves.; Pre Startup Water Piping Checkout; Check the pump operation and vent all air from the system.; Pre Startup Refrigerant Piping Checkout

OMM 1166 AGZ 025D through 190D 67 Extended 1. Front seat (close) both condenser liquid line service valves. 2. Put both circuit switches (PS1 and PS2) to the OFF position (Pumpdown and Stop position). 3. After the compressors have stopped, put System Switch (SW1) to the OFF position (emergency stop)...

Page 68 - Operation; The hot gas bypass valve cannot generate a 100% false load.

68 AGZ 025D through 190D OMM 1166 3. Put System Switch (S1) to the Emergency Stop position. 4. Put both circuit #1 & #2 switches to the Pumpdown and Stop position. 5. Apply power to the unit. The panel Alarm Light will stay on until S1 is closed. Ignore the Alarm Light for the check out period. ...

Page 69 - Compressor Communications; OPERATION; Warnings and Alerts

OMM 1166 AGZ 025D through 190D 69 Compressor Communications The communication module, installed in the 20 to 40 ton compressor electrical box, provides advanced diagnostics, protection, and communications that enhance compressor performance and reliability. Features include motor temperature protect...

Page 70 - System Adjustment

70 AGZ 025D through 190D OMM 1166 will lockout the compressor and a power cycle or Modbus reset command will be required to clear the lockout. Code 3 – Short Cycling: The module will flash the red Alert LED three times indicating the compressor is locked out due to short cycling. Once locked out the...

Page 71 - Crankcase Heaters

OMM 1166 AGZ 025D through 190D 71 about 12 hours to allow the system to reach equilibrium before deciding if the system requires a change of drier cores. Bubbles in the sight glass at constant full load indicates a shortage of refrigerant, a plugged filter-drier, or a restriction in the liquid line....

Page 73 - Unit Maintenance; DANGER

OMM 1166 AGZ 025D through 190D 73 Unit Maintenance General On initial start-up and periodically during operation, it will be necessary to perform certain routine service checks. Among these are checking the liquid line sight glasses, taking condensing and suction pressure readings, and checking to s...

Page 74 - Liquid Line Sight Glass; Planned Maintenance Schedule

74 AGZ 025D through 190D OMM 1166 Liquid Line Sight Glass The refrigerant sight glasses should be observed periodically (a weekly observation should be adequate.) A clear glass of liquid indicates that there is subcooled refrigerant charge in the system. Bubbling refrigerant in the sight glass, duri...

Page 75 - Service; Refrigerant Terminology; Miscibility; Safety

OMM 1166 AGZ 025D through 190D 75 Service R-410A Refrigerant Terminology Bubble Point: The temperature/pressure where bubbles first appear when heat is added to a liquid refrigerant. Used to measure sub-cooling. Dew Point: The temperature/pressure where droplets first appear when heat is removed fro...

Page 76 - Refrigerant Charging

76 AGZ 025D through 190D OMM 1166 certain polymers (e.g. PVC/CPVC and polycarbonate piping) Use only the manufacturer’s recommended oil. Use only new sealed metal containers of oil to insure quality. Buy smaller containers to prevent waste and contamination. Use only filter driers designed for POE a...

Page 78 - Liquid Line Solenoid Valve; Evaporator

78 AGZ 025D through 190D OMM 1166 Liquid Line Solenoid Valve The liquid line solenoid valves that shut off refrigerant flow in the event of a power failure do not normally require any maintenance. The solenoids can, however, require replacement of the solenoid coil or of the entire valve assembly. T...

Page 79 - AGZ-D Troubleshooting Chart

IMM 1078 AGZ 030C through 190C 79 AGZ-D Troubleshooting Chart PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS Compressor Will Not Run 1. Main switch. 1. Close switch. 2. Fuse blown. circuit breakers open 2. Check electrical circuits and motor windings for shorts or grounds. Investigate for possibl...

Page 80 - Warranty Statement; Limited Warranty; All

PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS Compressor Oil Level Too High Or Too Low 1. Oil hang-up in piping 1. Review refrigerant piping and correct. 2. Low oil level 2. Check and add oil. 3. Loose fitting on oil line 3. Check and tighten system. 4. Level too high 4. Adjust thermal expansion...