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IOM 1206-1

Unit Controller Operation

Unit Controller Operation

Unit Controller Operation

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 facilitate start-up.

The controller menu structure is separated into three distinct
categories that provide the operator or service technician with
a full description of :

1

current unit status

2

control parameters

3

alarms. Security protection prevents unauthorized
changing of the setpoints and control parameters.

MicroTech III control continuously performs self-diagnostic
checks, monitoring system temperatures, pressures and
protection devices, and will automatically shut down a
compressor or the entire unit should a fault occur. The cause
of the shutdown will be retained in memory and can be easily
displayed in plain English for operator review. The MicroTech
III chiller controller will also retain and display the date/time
the fault occurred. In addition to displaying alarm diagnostics,
the MicroTech III chiller controller also provides the operator
with a warning of limit (pre-alarm) conditions.

Controller Inputs and Outputs

Main Controller

Table 21: Analog Inputs

Table 22: Analog Outputs

Table 23: Digital Inputs

Table 24: Digital Outputs

#

Description

Type

Expected Range

AI1

Evaporator EWT

NTC 10k

340 to 300k

Ω

AI2

Evaporator LWT

NTC 10k

340 to 300k

Ω

AI3

Outside Ambient
Temperature

NTC 10k

340 to 300k

Ω

X1

Demand Limit

4-20 mA

1 to 23 mA

X4

LWT Reset

4-20 mA

1 to 23 mA

#

Description

Output Type

Range

X5

Circuit 1 Fan VFD Speed

Voltage

0 to 10 volts

X6

Circuit 2 Fan VFD Speed

Voltage

0 to 10 volts

Description

Signal Off

Signal On

DI1 External Alarm/Event

External Fault

No External Fault

DI2 Evaporator Flow Switch

No Flow

Flow

DI3

Double Set Point/ Mode
Switch

See sections on Unit Mode Selection and LWT

Target

DI4 Remote Switch

Remote Disable

Remote Enable

DI5 Unit Switch

Unit Disable

Unit Enable

Description

Output Off

Output On

DO1

Evaporator Water 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 Fan Output 3

Fan(s) Off

Fan(s) On

DO6

Circuit 1 Fan Output 4

Fan(s) Off

Fan(s) On

DO7

Circuit 2 Fan Output 1

Fan(s) Off

Fan(s) On

DO8

Circuit 2 Fan Output 2

Fan(s) Off

Fan(s) On

DO9

Circuit 2 Fan Output 3

Fan(s) Off

Fan(s) On

DO10

Circuit 2 Fan Output 4

Fan(s) Off

Fan(s) On

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Содержание AGZ030EH

Страница 1: ...tion Operation and Maintenance Manual IOM 1206 1 Air Cooled Scroll Compressor Chiller Group Chillers Part Number IOM1206 1 Date May 2014 2014 Daikin Applied AGZ030EH AGZ070EH Packaged Chillers R 410A...

Страница 2: ...ll 73 Hazard Identification 2014 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 a...

Страница 3: ...nit leaves the factory Handling Be careful to avoid rough handling of the unit Do not push or pull the unit from anything other than the base Block the pushing vehicle away from the unit to prevent da...

Страница 4: ...s to allow the required unit air flow to reach the coils Failure to do so will result in a capacity reduction and an increase in power consumption No obstructions are allowed above the unit at any hei...

Страница 5: ...requirements are met and service access is provided Pit covers must have abundant open area at least equal to the chiller footprint A solid wall surrounding a unit is substantially a pit and this dat...

Страница 6: ...construction Install pressure gauges in the inlet and outlet water lines to the evaporator Measure pressure drop through the evaporator and compare to flow as shown on page 18 Vibration eliminators a...

Страница 7: ...re required to isolate the unit from the piping during unit servicing 3 Manual or automatic air vent valves at the high points of the system Drains must be installed at the lowest points in the system...

Страница 8: ...m to provide freeze protection Freeze point should be approximately ten degrees F below minimum design ambient temperature 3 The addition of thermostatically controlled heat and insulation to exposed...

Страница 9: ...ed for outdoor installation They can freeze and not indicate a no flow conditions Glycol Solutions The use of a glycol water mixture in the evaporator to prevent freezing will reduce system capacity a...

Страница 10: ...67 484 881 400 548 249 453 205 1022 464 844 383 601 273 496 225 A GZ 045E 3094 1403 3112 1412 1051 477 832 377 676 307 535 243 1021 463 809 367 715 324 567 257 A GZ 050E 3093 1403 3114 1412 1049 476 8...

Страница 11: ...77 398 733 332 588 267 1065 483 854 387 772 350 619 281 A GZ 050E 3317 1505 3338 1514 1098 498 886 402 737 334 595 270 1071 486 864 392 776 352 627 284 A GZ 055E 3334 1512 3356 1522 1102 500 891 404 7...

Страница 12: ...RECESSED GR IP RIBS 500 13NC 2B R4 R 4 VM C V M C RP 4 Rubber in Shear RIS CP 2 Spring Isolator Spring Isolator Kit Numbers Aluminum Fins Copper Fins 030 332320102 332320132 035 332320102 332320132 04...

Страница 13: ...Brown Brown Brown Dk Grn Dk Prpl Dk Prpl Black 030 AGZ E Model Rubber In Shear RIS Mounts Spring Isolator Mountings 035 040 045 050 055 060 065 070 M1 M2 M3 M4 M5 M6 M7 M8 M1 M2 M3 M4 M5 M6 M7 M8 RP...

Страница 14: ...HOLE FOR ATTACHMENT TO CONCRETE 6 TYP 3 4 REMOVABLE ADJUSTING BOLT LIMIT STOPS NOT SHOWN IN TOP VIEW FOR CLARITY 2 7 8 2 1 4 7 6 1 4 1 1 8 8 5 1 8 10 1 4 8 3 8 1 2 5 3 4 1 4 3 8 ELASTOMERIC SNUBBER 3...

Страница 15: ...85 2410 85 2410 85 2410 85 2410 85 2410 Staging 4 Stages If Circuit is in Lead 0 25 50 75 100 0 25 50 75 100 0 23 50 73 100 0 27 50 77 100 0 25 50 75 100 0 25 50 75 100 MICROCHANNEL CONDENSER Coil In...

Страница 16: ...119 110 3119 110 3119 110 3119 Staging 4 Stages If Circuit is in Lead 0 25 50 75 100 0 25 50 75 100 0 25 50 75 100 0 25 50 75 100 0 23 50 73 100 0 27 50 77 100 MICROCHANNEL CONDENSER Coil Inlet Face A...

Страница 17: ...3119 110 3119 152 4309 110 3119 152 4309 Staging 4 Stages If Circuit is in Lead 0 25 50 75 100 0 25 50 75 100 0 25 50 75 100 0 25 50 75 100 0 21 50 71 100 0 28 50 78 100 MICROCHANNEL CONDENSER Coil In...

Страница 18: ...5 8 42 5 154 4 37 7 9 7 112 6 D 45E 40 9 2 3 2 6 6 8 63 9 5 3 4 0 15 8 102 2 13 2 6 5 39 4 170 4 34 4 10 8 102 7 E 50E 46 4 2 7 2 9 7 9 72 5 6 2 4 6 18 5 115 9 15 2 7 3 45 3 193 2 40 0 12 2 119 6 F 55...

Страница 19: ...Limitations 1 Within 10 percent of nameplate rating 2 Voltage unbalance not to exceed 2 with a resultant current unbalance of 6 to 10 times the voltage unbalance per NEMA MG 1 2009 Standard Rev 1 201...

Страница 20: ...2 70 TB2 69 TB2 68 TB2 61 TB2 TB1 22 TB1 1A TO COMPRESSOR S AND FAN MOTORS ALARM BELL RELAY 120 VAC FU5 T1 FU6 CONTROL CIRCUIT FUSE SEE NOTE 1 FU4 REMOTE STOP SWITCH BY OTHERS TB2 TB2 43 83 ALARM BELL...

Страница 21: ...TB2 68 TB2 61 TB2 TB1 22 TB1 1A TO COMPRESSOR S AND FAN MOTORS ALARM BELL RELAY 120 VAC FU5 T1 FU6 CONTROL CIRCUIT FUSE SEE NOTE 1 FU4 REMOTE STOP SWITCH BY OTHERS TB2 TB2 43 83 ALARM BELL OPTION N N...

Страница 22: ...0V 60 90 100 100 1 14 2 0 1 12 1 0 575V 60 75 90 90 1 14 2 0 1 12 1 0 400V 50 94 110 110 1 14 2 0 1 4 300MCM 208V 60 241 250 250 1 2 600MCM 2 3 0 500MCM 230V 60 241 250 250 1 2 600MCM 2 3 0 500MCM 380...

Страница 23: ...1 0 49 60 60 1 14 2 0 1 12 1 0 208V 60 127 150 175 1 14 2 0 1 6 350MCM 127 150 175 1 14 2 0 1 6 350MCM 230V 60 127 150 175 1 14 2 0 1 6 350MCM 127 150 175 1 14 2 0 1 6 350MCM 380V 60 69 90 90 1 14 2 0...

Страница 24: ...ler also provides the operator with a warning of limit pre alarm conditions Controller Inputs and Outputs Main Controller Table 21 Analog Inputs Table 22 Analog Outputs Table 23 Digital Inputs Table 2...

Страница 25: ...cuit 1 or Unit PVM GFP Fault No fault Description Output Off Output On DO1 Compressor 1 Compressor Off Compressor On DO2 Compressor 3 Compressor Off Compressor On DO3 Compressor 5 Compressor Off Compr...

Страница 26: ...34146 Pressure Pressure inputs will be read using 0 to 5 volt ratiometric sensors Nominal voltage range will be 0 5 to 4 5 volts Pressure on the low side will be measured using Daikin part number 3317...

Страница 27: ...ion Power Input Single Point Single Point Multi Point Evap Control 1 Only 1 Only 2 Only Auto 1 Primary 2 Primary Number of Compressors 4 4 6 Expansion Valve Type Thermal Thermal Electronic Fan VFD ena...

Страница 28: ...F 32 22 to 48 9 C 90 to 120 F Condenser Target 67 32 2 C 90 F 32 22 to 48 9 C 90 to 120 F Condenser Target 50 32 2 C 90 F 29 44 to 43 3 C 85 to 110 F Condenser Target 33 29 4 C 85 F 29 44 to 43 3 C 85...

Страница 29: ...ice personnel Operator password 2526 Entering Passwords Passwords are entered on the first screen on the unit controller If the wrong password is entered a message will temporarily appear stating this...

Страница 30: ...in terms of delta T also The term Effective Full Capacity Delta T means the approximate temperature delta that would be observed with the unit running at full capacity for the given flow Nominal flow...

Страница 31: ...itches between cool mode and ice mode if they are available and the control source is set to local The BAS mode request switches between cool mode and ice mode if they are both available and the contr...

Страница 32: ...to 150 seconds Therefore after the control is powered up no compressor can start for 150 seconds In addition the motor protect inputs are ignored during this time so as to avoid tripping a false alarm...

Страница 33: ...to Motor Prot Delay Unit State Auto and MP start up delay is active 3 Off Ice Mode Timer Unit State Off Unit Mode Ice and Ice Delay Active 4 Off OAT Lockout Unit State Off and Low OAT Lockout is activ...

Страница 34: ...ic above is still used When the evaporator is not in the run state the run hours of the pumps will be compared The pump with the least hours will be designated as the primary at this time LWT Target T...

Страница 35: ...ally start first and compressors with more run hours will normally stop first If possible circuits will be balanced in stage If a circuit is unavailable for any reason the other circuit shall be allow...

Страница 36: ...tore Option RapidRestore is an option that can be added to AGZ chillers The general purpose of the option is to allow the capability to restart more quickly and to load faster than normal Enabling The...

Страница 37: ...faster time to full capacity while maintaining stable operation within each circuit Assuming both circuits are able to run the effective unit stage up delay will be 30 to 35 seconds so it will load a...

Страница 38: ...38 IOM 1206 1 Unit Controller Operation Figure 16 Four Compressor Units Power Lost and Restored...

Страница 39: ...IOM 1206 1 39 Unit Controller Operation Figure 17 Four Compressor Units Backup Chiller Constant Power...

Страница 40: ...it Control Logic Circuit Enabling A circuit should be enabled to start if the following conditions are true Circuit switch is closed No circuit alarms are active Circuit Mode set point is set to Enabl...

Страница 41: ...OAT start is initiated if the condenser refrigerant saturated temperature is less than 29 5 C 85 1 F when the first compressor starts Once the compressor starts the circuit is in a low OAT start stat...

Страница 42: ...es below show the outputs energized for each stage Condenser Target A condenser target should be selected from the setpoints based on the number of compressors on the unit and the number of compressor...

Страница 43: ...tage is 0 When the fan stage is greater than 0 the VFD speed signal should be enabled and control the speed as needed Stage Up Compensation In order to create a smoother transition when another fan is...

Страница 44: ...alve maximum position may be increased if after two minutes both the suction superheat is greater than 7 2 C 13 F and the expansion valve has been within 5 of its current maximum position The maximum...

Страница 45: ...a the keypad or via the BAS clear alarm command If active via trigger condition 1 When the alarm occurs due to this trigger it can auto reset the first two times each day with the third occurrence bei...

Страница 46: ...and the extension module is working for 5 seconds or Expansion Valve Type Thermal Unit Problem Alarms Evaporator Pump 1 Failure Trigger Unit is configured with primary and backup pumps pump 1 is runn...

Страница 47: ...ure goes below the Low Evaporator Pressure Unload set point a timer starts If this timer exceeds the freeze time then a freezestat trip occurs If the evaporator pressure rises to the unload set point...

Страница 48: ...r the current day and the count of occurrences for each of the previous 7 days Unit Events Unit Power Restore Trigger Unit controller is powered up Action Taken None Reset None Circuit Events Low Evap...

Страница 49: ...stores the last 50 occurrences or resets that occur When an alarm or event occurs it is put into the first slot in the alarm log and all others are moved down one dropping the last entry The date and...

Страница 50: ...here are lines above and below the currently displayed line The selected line is highlighted Each line on a screen can contain status only information or include changeable data fields setpoints When...

Страница 51: ...iously displayed page If the Back button is repeatedly pressed the display continues to revert one page back along the current navigation path until the main menu is reached When the Menu Home Button...

Страница 52: ...s temperatures values and setpoints The first line is Evap LWT rotate wheel until Cool LWT 1 is highlighted Press the wheel to enter edit mode Rotate wheel until new setpoint is reached then press whe...

Страница 53: ...ber R Alarm Entry 25 R Unit Serial Number R Starter Model Number s Starter Serial Number s BSP Version R Starter Model Numbers Application Version R Circuit 1 R W HMI GUID R Circuit 2 R W OBH GUID R C...

Страница 54: ...to the Motor The AC motor must be connected only to the inverter s output terminals The output terminals are uniquely labeled to differentiate them from the input terminals with the designations U T1...

Страница 55: ...ng this button will return to the Frequency Reference display 3 Moves the cursor to the right Resets the drive to clear a fault situation 4 RUN Key Starts the drive in LOCAL mode 5 Up Arrow Key Scroll...

Страница 56: ...e is assigned to the MEMOBUS Modbus CommunicationInputs of the drive OP Displayed when the frequency reference is assigned to an Option Unit of the drive RP Displayed when the frequency reference is a...

Страница 57: ...r than the operator is selected for Run command and frequency reference control REMOTE During run During deceleration to stop When a Run command is input and frequency reference is 0 Hz While the driv...

Страница 58: ...cator LED flashes Remove the cause of the problem to reset a minor fault or alarm Operation Errors An operation error occurs when parameter settings conflict or do not match hardware settings such as...

Страница 59: ...h III chiller BACnet and LONWORKS ED 15121 Protocol Information for MicroTech III chiller Modbus WARNING Electrical Shock Hazard Before servicing or inspecting the equipment disconnect power to the un...

Страница 60: ...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 fo...

Страница 61: ...both refrigerant circuit discharge valves if applicable 5 If chilled water system is not drained maintain power to the evaporator heater to prevent freezing Maintain heat tracing on the chilled water...

Страница 62: ...mum of 10oF 23 3oC The control looks at the saturated discharge temperature and varies pressure at the target temperature This temperature is established as an input to a setpoint screen labeled Sat C...

Страница 63: ...value Note If a compressor with CoreSense Communications fails in the field the CoreSense module should remain with the failed compressor so the manufacturer s technicians can download the CoreSense...

Страница 64: ...s AGZ 030E through 070E the evaporator is a compact high efficiency dual circuit brazed plate to plate type heat exchanger consisting of parallel stainless steel plates The evaporator is protected wit...

Страница 65: ...the condensing process refrigerant in the coil passes through the micro channel flat tubes resulting in higher efficiency heat transfer from the refrigerant to the airstream In the unlikely occurence...

Страница 66: ...ing is essential to extend the life of an ElectroFin Coated Coil and is required to maintain warranty coverage Coil cleaning shall be part of the unit s regularly scheduled maintenance procedures Fail...

Страница 67: ...hood two inlet screens with filters necessary controls and wiring to allow operation to 125 F 52 C The option can be factory or field installed as a kit It must be supplied on units operating at ambi...

Страница 68: ...review Note 3 X Visually inspect unit for loose or damaged components X Inspect thermal insulation for integrity X Clean and paint as required X Electrical Check terminals for tightness tighten as nec...

Страница 69: ...r pressurize systems with oxygen or ref air mix R 410A R 407C R 134A R 22 are flammable with low air mix Wear protective clothing Impervious gloves and splash goggles should be worn Avoid contact with...

Страница 70: ...charge to the recommended liquid line sub cooling approximately 14 20 degrees F typical Verify the suction superheat 10 degrees F for EEVs and 10 12 degrees F for TXVs at full load conditions Use sta...

Страница 71: ...require replacement of the solenoid coil or of the entire valve assembly The solenoid coil can be checked to see that the stem is magnetized when energized by touching a screwdriver to the top of the...

Страница 72: ...irculation 6 Clean coil 7 Correct Low Discharge Pressure 1 Refrigerant flood back 1 Correct 2 Wind blowing into coil at low ambient 2 Shield coil from direct wind Wind guards are available 3 Faulty co...

Страница 73: ...superheat 3 Crankcase heater burnout 3 Replace crankcase heater Motor Overload Relays or Circuit Breakers Open 1 Low voltage during high load conditions 1 Check supply voltage for excessive line drop...

Страница 74: ...UP PROCEDURE II Pre Start Up Checklist Pre Start Up Checklist All NO checks require an explanation under Description Please check yes or no YES NO A Is the unit free of visible shipping damage corrosi...

Страница 75: ...Air Temperature ________ F C F C M Are all service and liquid line valves open N Have all shipping hold down plates been removed O Has a flow switch been installed per the IM bulletin P Has the chill...

Страница 76: ...quid Line Temperature F C F C Subcooling F C F C G Circuit 2 Refrigerant Temperatures Saturated Evaporator Temperature F C F C Suction Line Temperature F C F C Suction Superheat F C F C Saturated Cond...

Страница 77: ...g kPa psig kPa Q High Pressure Cut Out psig kPa psig kPa R Unit Type S Number of Compressors T Number of Stages U Number of Fan Stages V Software Version VII FOR HEAT RECOVERY CHILLERS ONLY Must Be Ta...

Страница 78: ...Applied equipment is sold pursuant to its standard terms and conditions of sale including Limited Product Warranty Consult your local Daikin Applied representative for warranty details To find your l...

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