Daikin AGZ 140D Manuale Utente

Operating & Maintenance Manual OMM 1166 Group: Chiller Part No. OMM 1166 Effective: April 2013 Supersedes: August 2012 Air-Cooled Scroll Compress

10 AGZ 025D through 190D OMM 1166 Pressure Drop Curves The pressure drop for any given unit is the same regardless of constant or variable flow. On

OMM 1166 AGZ 025D through 190D 11 Table 8, Curve Cross-Reference, Min/Nominal/Max Flows AGZ Model Curve Ref. Variable Flow System Only Fixed Fl

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

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

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 efficie

OMM 1166 AGZ 025D through 190D 15 Table 12, Digital Outputs Description Output Off Output On DO1 Evaporator Water Pump 1 Pump Off Pump On DO2 Alar

16 AGZ 025D through 190D OMM 1166 Digital Outputs Description Output Off Output On DO1 Compressor #2 Compressor Off Compressor On DO2 Compressor #4

OMM 1166 AGZ 025D through 190D 17 Unit Level Setpoints: Description Default Range Mode/Enabling Unit Enable Enable Disable, Enable Network Unit E

18 AGZ 025D through 190D OMM 1166 Description Default Range High Condenser Pressure Unload 4137 KPA(600 PSI) 3241 to 4137 KPA (470 to 600 PSI) Evap

OMM 1166 AGZ 025D through 190D 19 Auto Adjusted Ranges Some settings have different ranges of adjustment based on other settings: Cool LWT 1, C

2 AGZ 025D through 190D OMM 1166 Table of ContentsIntroduction ...3Operating/Standby Limits ...

20 AGZ 025D through 190D OMM 1166 Security All setpoints are protected using passwords. A four-digit password provides operator access to changeabl

OMM 1166 AGZ 025D through 190D 21 Unit Capacity For applying unit capacity limits, an estimate of total unit capacity is needed. Unit capacity wil

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 Ava

OMM 1166 AGZ 025D through 190D 23 T1 - Off to Auto All of the following are required: • Unit Enable = On • No Unit Alarm • A circuit is enabl

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 Sw

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

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 CO

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

28 AGZ 025D through 190D OMM 1166 Four Compressors: Demand Limit Signal (%) Demand Limit (mA) Stage Limit Limit ≥ 75% Limit ≥ 16 mA 1 75% >

OMM 1166 AGZ 025D through 190D 29 Circuit Functions Definitions Refrigerant Saturated Temperature • Refrigerant saturated temperature shall be cal

OMM 1166 AGZ 025D through 190D 3 Introduction General Description NOTE: Vintage changes; this manual covers Revision 0A to the original AGZD version

30 AGZ 025D through 190D OMM 1166 Transitions between these states are shown in the following diagram. OFFRUNPUMPDOWNT3T2T4T1POWER ONT5PREOPENT6 T

OMM 1166 AGZ 025D through 190D 31 Pumpdown Procedure Pumpdown is performed as follows: • If multiple compressors are running, shut off the approp

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 log

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 t

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 con

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

36 AGZ 025D through 190D OMM 1166 For the auto reset occurrences, the alarm will reset automatically when the evaporator state is Run again. This

OMM 1166 AGZ 025D through 190D 37 Reset: This alarm can be cleared manually via the keypad or BAS command when communication between main controll

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 externa

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 short

4 AGZ 025D through 190D OMM 1166 Ambient Air Temperature Limitations Standard/High Ambient Panels The maximum operating ambient temperature for st

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 pr

OMM 1166 AGZ 025D through 190D 41 Low Evaporator Pressure - Unload Trigger: This event is triggered if all of the following are true: • circuit

42 AGZ 025D through 190D OMM 1166 Unit Events Unit Power Restore Trigger: Unit controller is powered up. Action Taken: none. Reset: none. Circuit

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 t

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 disp

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 l

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 pa

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 lin

48 AGZ 025D through 190D OMM 1166 Screen U-2 From Screen U-1 Enter Password No password Operator Links to screen Enter PW R/W R/W Scree

OMM 1166 AGZ 025D through 190D 49 Screen U-6 From Screen U-1 Time Until Restart No password Operator Links to screen Compressor 4 Cycle Time Re

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 an

50 AGZ 025D through 190D OMM 1166 Screen U-11 From Screen U-1 Commission Unit No password Operator Links to screen Modbus Setup U-21 AW

OMM 1166 AGZ 025D through 190D 51 Screen U-14 From Screen U-4, U11 Set-Up No password Operator Links to screen Available Modes R Start Up

52 AGZ 025D through 190D OMM 1166 Screen U-18 From Screen U-4, U-11 LON Setup No password Operator Links to screen Neuron ID R Max Send Tim

OMM 1166 AGZ 025D through 190D 53 Screen U-21 From Screen U-4, U-11 Modbus Setup No password Operator Links to screen Response Delay R/W C

54 AGZ 025D through 190D OMM 1166 Screen U-25 From Screen U-4 Design Conditions No password Operator Links to screen Screen U-25 From Screen U

OMM 1166 AGZ 025D through 190D 55 Screen U-30 From Screen U-7, U-9, U-11 Alarm Active No password Operator Links to screen Active Count R R A

56 AGZ 025D through 190D OMM 1166 Screen U-34 From Screen U-10, U-11 Unit Manual Control No password Operator Links to screen LWT Reset Signal C

OMM 1166 AGZ 025D through 190D 57 Screen Cx-2 From Screen U-9 Circuit x Status/Settings No password Operator Links to screen Evap Leaving Water

58 AGZ 025D through 190D OMM 1166 Screen Cx-3 From Screen U-10, U-11 Circuit x Manual Control No password Operator Links to screen Test Fan Outp

OMM 1166 AGZ 025D through 190D 59 Screen Cx-6 From Screen Cx-1 Condenser No password Operator Links to screen Number of Fans Running * Numb

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 oF oC

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 m

OMM 1166 AGZ 025D through 190D 61 VFD Interface (HMI) The HMI is located in the lower left-hand corner of the unit control panel. It is used t

62 AGZ 025D through 190D OMM 1166 LCD Display Table 16, Display Data No Name Display Content 1 Operation Mode Menus MODE Displayed wh

OMM 1166 AGZ 025D through 190D 63 Table 17, Alarm Content State Content Display Illuminated When the drive detects an alarm or error Flashing

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

OMM 1166 AGZ 025D through 190D 65 Recommended Periodic Inspection !WARNINGElectrical Shock Hazard. Before servicing or inspection equipment, disconn

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

OMM 1166 AGZ 025D through 190D 67 Extended 1. Front seat (close) both condenser liquid line service valves. 2. Put both circuit switches (PS1 an

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 Pumpd

OMM 1166 AGZ 025D through 190D 69 Compressor Communications The communication module, installed in the 20 to 40 ton compressor electrical box, pro

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

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

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

72 AGZ 025D through 190D OMM 1166 The refrigerant (tube) side maximum working pressure is 300 psig (2068 kPa). The water side working pressure is

OMM 1166 AGZ 025D through 190D 73 Unit Maintenance General On initial start-up and periodically during operation, it will be necessary to perform ce

74 AGZ 025D through 190D OMM 1166 Liquid Line Sight Glass The refrigerant sight glasses should be observed periodically (a weekly observation shoul

OMM 1166 AGZ 025D through 190D 75 Service R-410A Refrigerant Terminology Bubble Point: The temperature/pressure where bubbles first appear when hea

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 n

OMM 1166 AGZ 025D through 190D 77 have liquid leave the cylinder and vapor enter the compressor. Overcharging of refrigerant will raise the compres

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

IMM 1078 AGZ 030C through 190C 79 AGZ-D Troubleshooting Chart PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS Compressor Will Not Run 1. Main

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

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

(800) 432-1342 • www.DaikinApplied.com OMM 1166 (4/13) Daikin Applied Training and Development Now that you have made an investment in modern, effic

OMM 1166 AGZ 025D through 190D 9 automatic through the ambient sensing thermostat that energizes the evaporator heater cable for protection against