Daikin McQuay AGZ-D 25 Скачать руководство пользователя страница 77 | Manualshive

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OMM 1087-1

AGZ 025D through 190D

77

have liquid leave the cylinder and vapor enter
the compressor.

Overcharging of refrigerant will raise the
compressor discharge pressure due to filling of
the condenser tubes with excess refrigerant.

Service Issues

With R-410A, fractionalization, if due to leaks
and recharge has a minimal effect on
performance or operation.

Special tools will be required due to higher
refrigerant pressures with R-410A. Oil-less/hp
recovery units, hp recovery cylinders (DOT
approved w/525# relief), gauge manifold 30”-
250 psi low/0-800 psi high, hoses w/800 psi
working & 4,000 psi burst.

All filter driers and replacement components
must be rated POE oils and for the refrigerant
pressure (R-410A 600psig typical).

R-410A compressor internal relief is 600-650
psid.

Brazed connections only. No StayBrite or
solder connections (solder should never be
used with any refrigerant). K or L type
refrigeration tubing only. Use nitrogen purge.
Higher R-410A pressures and smaller molecule
size make workmanship more critical.

R-410A must be charged from cylinder as a
liquid unless entire cylinder is used. Use a
Refrigerant flow restrictor if charging liquid to
suction or to a system at pressure below a
saturated temperature of 32° F.

EPA recovery and handling requirements for
R-410A are the same as R-22.

Cooling the recovery cylinder will speed
recovery and lessen stress on recovery
equipment.

!

WARNING

Service on this equipment is to be performed by qualified refrigeration personnel
familiar with equipment operation, maintenance, correct servicing procedures, and the
safety hazards inherent in this work. Causes for repeated tripping of equipment
protection controls must be investigated and corrected.

Disconnect all power before doing any service inside the unit.

Servicing this equipment must comply with the requirements set forth by the EPA in
regards to refrigerant reclamation and venting.

Filter-Driers

Replace the filter-drier any time excessive
pressure drop is read across the filter-drier

and/or when bubbles occur in the sight glass
with normal subcooling. The maximum
recommended pressure drops across the filter-
drier are shown in

The filter-drier should also be changed if the
moisture indicating liquid line sight glass
indicates excess moisture in the system.

During the first few months of operation the
filter-drier replacement can be necessary if the
pressure drop across the filter-drier exceeds the
values listed in the paragraph above. Any
residual particles from the condenser tubing,
compressor and miscellaneous components are
swept by the refrigerant into the liquid line and
are caught by the filter-drier.

PERCENT CIRCUIT

LOADING (%)

MAXIMUM RECOMMENDED
PRESSUREDROP ACROSS
FILTER DRIER PSIG (KPA)

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Содержание AGZ-D 25

Страница 1: ...d Maintenance Manual OMM 1087 1 Group Chiller Part Number OMM 1087 Effective August 2012 Supersedes May 2012 Air Cooled Scroll Compressor Chiller AGZ D 25 to 190 Tons 50 60 Hertz R 410A Software Versi...

Страница 2: ...ng the Controller 44 Navigating 45 Menus 47 Optional Low Ambient Fan VFD 60 VFD Interface HMI 61 Recommended Periodic Inspection 65 Optional BAS Interface 65 Startup 66 Operation 68 Unit Maintenance 7...

Страница 3: ...compressor lead lag to alternate the compressor starting sequence and sequenced starting of compressors The electrical control center includes all equipment protection and operating controls necessary...

Страница 4: ...ter flow through the evaporator as the load changes Daikin McQuay chillers are designed for this duty provided that the rate of change in water flow is slow and the minimum and maximum flow rates for...

Страница 5: ...glycol from the freezing point tables below It is recommended that a minimum of 25 solution by weight be used for protection against corrosion or that additional compatible inhibitors be added Concent...

Страница 6: ...han sea level refer to Table 6 and Table 7 Evaporator Temperature Drop Factors Performance tables are based on a 10 F 5 C temperature drop through the evaporator Adjustment factors for applications wi...

Страница 7: ...10 5 6 0 998 1 009 0 995 1 007 0 982 1 003 0 959 0 996 12 6 7 1 007 1 011 1 004 1 010 0 991 1 006 0 967 0 998 14 7 7 1 014 1 014 1 011 1 013 0 998 1 009 0 974 1 001 16 8 9 1 022 1 016 1 018 1 014 1 00...

Страница 8: ...025 0 949 1 014 0 879 0 995 16 8 9 1 006 1 031 0 992 1 027 0 952 1 016 0 882 0 996 8000 feet 6 3 3 0 979 1 034 0 966 1 031 0 927 1 019 0 859 1 000 8 4 4 0 984 1 036 0 971 1 032 0 932 1 021 0 863 1 002...

Страница 9: ...eze 15 F to 60 F 9 4 C to 15 6 C Chilled water Delta T range 6 degrees F to 16 degrees F 3 3 degrees C to 8 9 degrees C Part load minimum flow for variable flow systems varies with unit size see Table...

Страница 10: ...ge for curve cross reference See following page for curve cross reference and min max flow rates AGZ Water Pressure Drop A B B C C D D E E F F G G H H I I J J K K L L M M N N O O P P Q Q R R S S T T U...

Страница 11: ...84 2 5 1 5 3 15 3 134 6 12 5 8 5 37 3 215 4 30 5 13 6 91 0 H 065D 87 2 4 5 5 5 13 4 139 4 11 0 8 8 32 8 223 1 26 9 14 1 80 1 I 070D 96 2 5 4 6 1 16 2 153 8 13 3 9 7 39 6 246 1 32 5 15 5 96 8 J 075D 10...

Страница 12: ...12 AGZ 025D through 190D OMM 1087 1 Figure 2 Typical Field Control Wiring...

Страница 13: ...election 22 Unit States 22 Start Delays 23 Evaporator Pump Control 24 Leaving Water Temperature LWT Reset Target 25 Unit Capacity Control 26 Unit Capacity Overrides 27 Circuit Control Functions 29 Cir...

Страница 14: ...n 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 a...

Страница 15: ...it Enable X7 Circuit 1 MHP Switch Fault No fault X8 Circuit 1 Motor Protection Fault No fault DI1 Circuit 1 or Unit PVM GFP Fault No fault Digital Outputs Description Output Off Output On DO1 Compress...

Страница 16: ...1 M1 EXV Stepper Coil 1 M2 M2 EXV Stepper Coil 2 Sensor Information Temperature All temperature sensors will be McQuay part number 1934146 Pressure Pressure inputs will be read using 0 to 5 volt ratio...

Страница 17: ...Demand Limit Enable Off Off On Network Capacity Limit 100 0 to 100 LWT Reset Enable Off Off On Configuration Power Input Single Point Single Point Multi Point Evap Control 1 Only 1 Only 2 Only Auto 1...

Страница 18: ...Target 100 37 8 C 100 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...

Страница 19: ...to 115 PSI Special Set Point Operations The following setpoints are not changeable unless the unit switch is off Available Modes Number of Compressors Expansion Valve Type Number of Fans Fan VFD Enabl...

Страница 20: ...roller setpoints may be changed If the operator attempts to edit a setpoint for which the necessary password level is not active no action will be taken Once a password has been entered it remains val...

Страница 21: ...ature LWT target Control Band LWT target 3 9 C If the unit is configured for use with glycol the compressor staging temperatures are calculated as shown below Stage Up Temperature LWT target Control B...

Страница 22: ...changing modes of operation inadvertently while the chiller is running Unit Mode is set according to the following table Control Source Set Point Mode Input BAS Request Available Modes Set Point Unit...

Страница 23: ...avoid tripping a false alarm Ice Mode Start Delay An adjustable start to start ice delay timer will limit the frequency with which the chiller may start in Ice mode The timer starts when the first com...

Страница 24: ...o max pulldown rate has been met or exceeded 16 Auto Unit Cap Limit Unit State Auto unit capacity limit has been met or exceeded 17 Auto High Ambient Limit 18 Config Changed Reboot Required A configur...

Страница 25: ...e greater than the recirculate timeout set point and there is no flow then the primary pump will shut off and the standby pump will start When the evaporator is in the run state if flow is lost for mo...

Страница 26: ...bed in following sections must be applied as described Compressor Staging in Cool Mode The first compressor on the unit should be started when evaporator LWT is higher than the Startup Temperature Add...

Страница 27: ...art Within that circuit the available compressor with the least starts will be next to start if starts are equal the one with the least run hours will be next to start if run hours are equal the lowes...

Страница 28: ...0 Limit 83 3 5 83 3 Limit 66 7 4 66 7 Limit 50 3 50 Limit 33 3 2 33 3 Limit 1 Maximum LWT Pulldown Rate The maximum rate at which the leaving water temperature can drop shall be limited by the Maximum...

Страница 29: ...ow Evaporator Pressure Unload set point The equation is as follows Pumpdown pressure Low Evap Pressure Unload set point 103KPA 15 PSI Circuit Control Logic Circuit Enabling A circuit should be enabled...

Страница 30: ...commanded to stop Unit State Pumpdown Circuit switch is open Circuit mode is disable Circuit Pumpdown alarm is active T4 Pumpdown to Off Any of the following are required Evaporator Pressure Pumpdown...

Страница 31: ...hutdown Multiple Low Ambient Start attempts are allowed On the third failed Low Ambient Start attempt the Restart Alarm is triggered and the circuit will not attempt to restart until the Restart alarm...

Страница 32: ...ling of power to the chiller This means that if power is cycled the cycle timers should not be active These timers may be cleared via a setting on the human machine interface HMI Condenser Fan Control...

Страница 33: ...one through four should use their respective dead bands Stages five through seven should all use Stage Down Dead Band 4 When the saturated condenser refrigerant temperature is below the target the act...

Страница 34: ...ll and tube type evaporator When staging down a compressor the maximum position is reduced by 10 for one minute to prevent liquid from getting to compressors After this initial one minute delay the va...

Страница 35: ...arms are classified in the following sections per the Global Chiller Protocol Standard using the Fault Problem Warning scheme When any Unit Fault Alarm is active the alarm digital output should be tur...

Страница 36: ...conditions no longer exist Evaporator LWT Sensor Fault Trigger Sensor shorted or open Action Taken Normal stop all circuits Reset This alarm can be cleared manually via the keypad or BAS command but o...

Страница 37: ...e keypad or BAS command when communication between main controller and the extension module is working for 5 seconds or Expansion Valve Type Thermal Unit Problem Alarms Low Ambient Lockout No longer a...

Страница 38: ...reset is enabled For this alarm out of range is considered to be a signal less than 3mA or more than 21mA Action Taken Cannot use LWT reset function Reset Auto clear when LWT reset is disabled or LWT...

Страница 39: ...he evaporator pressure sensor fault is active Action Taken Rapid stop circuit Reset This alarm can be cleared manually via the keypad if the evaporator pressure is above 137 9 KPA 20 PSI High Condense...

Страница 40: ...s alarm can be cleared manually via the keypad or BAS command but only if the sensor is back in range Suction Temperature Sensor Fault Trigger Sensor shorted or open and Expansion Valve Type Electroni...

Страница 41: ...if the circuit is no longer in the run state High Condenser Pressure Unload Trigger This event is triggered if all of the following are true circuit state Run more than one compressor is running on th...

Страница 42: ...porator Pressure Unload set point for a time greater than half of the current freezestat time circuit is not currently in a low OAT start it has been at least 30 seconds since a compressor has started...

Страница 43: ...t Log An Event Log similar to the Alarm Log stores the last 50 event occurrences Each Event Log entry includes an event description and a time and date stamp for the event occurrence plus the count of...

Страница 44: ...ins a menu title a parameter such as a value or a setpoint or a link which will have an arrow in the right of the line to a further menu The first line visible on each display includes the menu title...

Страница 45: ...which can also be accessed by pressing the Menu Button The navigating wheel is the only navigating device necessary although the MENU ALARM and BACK buttons can provide shortcuts as explained later Pa...

Страница 46: ...the wheel again cause the new value to be saved and the keypad display to leave the edit mode and return to the navigation mode A parameter with an R is read only it is giving a value or description...

Страница 47: ...creen the linked screen is indicated in the rightmost column Example the Enter Password screen links to screen U 2 For each screen the screen s from which you can navigate to it is also shown on the s...

Страница 48: ...3 Set Up R U 14 Temperatures R U 15 Date Time Schedules R U 16 Power Conservation R U 17 LON Setup R U 18 BACnet IP Setup R U 19 BACnet MSTP Setup R U 20 Modbus Setup R U 21 AWM Setup R U 22 Configura...

Страница 49: ...ervice Support Reference R R Screen U 9 From Screen U 1 Review Operation No password Operator Links to screen Alarm Active U 30 Alarm Log U 31 Unit Status Settings U 33 Circuit 1 Status Settings Cx 2...

Страница 50: ...sion R R Application Version R R HMI GUID R R OBH GUID R R Screen U 13 From Screen U 4 Status Settings No password Operator Links to screen Unit Status R Next Compressor On R Next Compressor Off R Chi...

Страница 51: ...elta T R Active Set Point R Start Up Temperature R Shut Down Temperature R Stage Up Temperature R Stage Down Temperature R Pulldown Rate Outside Air Temperature R Cool LWT Setpoint 1 R W Cool LWT Setp...

Страница 52: ...sk R Actual Gateway R Given IP Address R W Given Mask R W Given Gateway R W Unit Support R W NC Dev 1 R W NC Dev 2 R W BACnet BSP R Screen U 20 From Screen U 4 U 11 BACnet MSTP Setup No password Opera...

Страница 53: ...ssword Operator Links to screen Apply Changes Number Of Compressors Expansion Valve Type Number Of Fans Fan VFD Enable Power Configuration Comm Module 1 Type Comm Module 2 Type Comm Module 3 Type Scre...

Страница 54: ...re Shutdown Setpoint Low Ambient Start Time Evaporator Water Freeze Evaporator Flow Proof Evap Recirculate Timeout Screen U 27 From Screen U 4 U 11 Calibrate Sensors No password Operator Links to scre...

Страница 55: ...nit Status Settings No password Operator Links to screen Actual Time Actual Date Unit Status Unit Mode Unit Capacity Evap Leaving Water Temp Evap Entering Water Temp Active Set Point Pulldown Rate Out...

Страница 56: ...reen U 37 From Screen U 32 Circuit 1 Event Log No password Operator Links to screen Event Selection R W Day Selection R W Count R Last Occurrence R Screen U 38 From Screen U 32 Circuit 1 Event Log No...

Страница 57: ...n Hours Number Of Starts Last Compressor Start Last Compressor Stop Compressor 5 6 Run Hours Number Of Starts Last Compressor Start Last Compressor Stop Condenser Number of Fans Running Stage Up Error...

Страница 58: ...olenoid Output State Hot Gas Bypass Output State Fan Output 1 State Fan Output 2 State Fan Output 3 State Fan Output 4 State Fan Output 5 State Fan VFD Speed Screen Cx 4 From Screen Cx 1 Data No passw...

Страница 59: ...et 100 Cond Target 67 Cond Target 50 Cond Target 33 Screen Cx 7 From Screen Cx 1 EXV No password Operator Links to screen EXV State Suction Superheat Superheat Target EXV Control Mode EXV Position Eva...

Страница 60: ...the Motor WARNING Avoid swapping any 2 of the 3 motor lead connections which will cause reversal of the motor direction In applications where reversed rotation could cause equipment damage or personne...

Страница 61: ...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 Scrolls up to...

Страница 62: ...d 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 assigned to t...

Страница 63: ...an 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 drive wa...

Страница 64: ...i function contact outputs do not operate The drive will not operate the motor until the error has been reset Correct the settings that caused the operation error to clear the error Tuning Errors Tuni...

Страница 65: ...ntactors and relays for excessive noise Check for over or undervoltage Inspect for signs of overheating such as melted or cracked insulation Replace damaged parts Optional BAS Interface The AGZ chille...

Страница 66: ...control band before the MicroTech III controller will stage on cooling 4 Set the Evap Delta T and the Start Delta T as a starting point 5 Put both pumpdown switches PS1 and PS2 to the ON position 6 P...

Страница 67: ...ll water strainers before placing the chiller into service Pre Startup Refrigerant Piping Checkout 1 Check all exposed brazed joints for evidence of leaks Joints may have been damaged during shipping...

Страница 68: ...air handler load Note The hot gas bypass valve cannot generate a 100 false load The pressure regulating valves are a Sporlan HGBE 8 75 150 7 8 ODF on models AGZ 025 to 065 and Sporlan HGBE 8 75 150 1...

Страница 69: ...element may indicate a wet condition It is recommended that the equipment operate for about 12 hours to allow the system to reach equilibrium before deciding if the system requires a change of drier c...

Страница 70: ...ultant should administer the proper testing and evaluate compatibility Models AGZ 140C through 180C The evaporator is direct expansion shell and tube type with water flowing in the baffled shell side...

Страница 71: ......

Страница 72: ...tlets Use caution when applying such cleaners as they can contain potentially harmful chemicals Care should be taken not to damage the fins during cleaning The coils should be thoroughly rinsed to rem...

Страница 73: ...ement color If the sight glass does not indicate a dry condition after about 12 hours of operation the circuit should be pumped down and the filter drier changed or verify moisture content by performi...

Страница 74: ...es all weekly and monthly operations 3 Log readings can be taken daily for a higher level of unit observation 4 Coil cleaning can be required more frequently in areas with a high level of airborne par...

Страница 75: ...proved R 410A with 400 psig rating Open cylinders slowly Avoid rough handling of cylinders and secure as appropriate Cap when not in use Do not overfill recovery cylinders or overcharge units Check ga...

Страница 76: ...rge the unit Locate and repair any refrigerant leaks Soap works well to show bubbles at medium size leaks but electronic leak detectors are needed to locate small leaks Charging or check valves should...

Страница 77: ...e the same as R 22 Cooling the recovery cylinder will speed recovery and lessen stress on recovery equipment WARNING Service on this equipment is to be performed by qualified refrigeration personnel f...

Страница 78: ...78 AGZ 025D through 190D OMM 1087 1 Table 22 Filter Drier Pressure Drop PERCENT CIRCUIT LOADING MAXIMUM RECOMMENDED PRESSUREDROP ACROSS FILTER DRIER PSIG KPA 100 10 69 75 8 55 2 50 5 34 5 25 4 27 6...

Страница 79: ...ere is no power to the coil The solenoid coil can be removed from the valve body without opening the refrigerant piping after pumpdown For personal safety shut off and lock out the unit power The coil...

Страница 80: ...recirculation 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...

Страница 81: ......

Страница 82: ...e line drop 2 Defective or grounded wiring in motor 2 Replace compressor motor 3 Loose power wiring or burnt contactors 4 High condenser temperature 5 Power line fault causing unbalanced voltage 3 Che...

Страница 83: ......

Страница 84: ...ing or call 540 248 9646 to speak with the Training Department Warranty All Daikin McQuay equipment is sold pursuant to McQuay International standard terms and conditions of sale including Limited Pro...

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