Air PreciseAIR PCA Series Installation, Operation And Maintenance Manual Download Page 19 | Manualshive

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IOM-PreciseAIR

Page

19

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50

Item Description
1

Flex duct connection

2

Centrifugal blower

3

Blower motor with adjustable base (one per blower)

4

Thermal or electronic expansion valve

5

DX Evaporator coil

6

Drain pan

Figure 6: AHU Section Internal Components

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Summary of Contents for PreciseAIR PCA Series

Page 1: ...ance IOM PreciseAIR Release Date 11 12 20 PreciseAIR 7 5 to 60 tons Series PPW Packaged Water Cooled DX Unit Series PCA Split System Air Cooled DX Unit Series PPA Packaged Air Cooled DX Unit Series PH...

Page 2: ...2 12 Electrical Drawings and Connections 13 2 13 Main Control Panel Layout and Components 15 2 14 Smoke Detector 16 2 15 Duct Mounted Sensors 16 2 16 Room Mounted Sensors 16 3 Operation 16 3 1 System...

Page 3: ...3 Air Cooled Condensers 40 4 4 Water Cooled Condensers 41 4 5 Filters 42 4 6 Drives sheaves and belts 42 4 7 Blower Bearings 43 4 8 Blower Wheel and Shaft Maintenance 44 4 9 Evaporator Coil 45 4 10 Ma...

Page 4: ...al Drawings Model Designations Series PPW Series PCA Series PPA Series PHW Guide Specifications Series PPW Series PCA Series PPA Series PHW Technical Bulletins o TB 14 Piping Recommendation for Refrig...

Page 5: ...he unit should be performed immediately upon delivery Note and photograph any external damage or other damage due transportation on the freight carrier s forms Inspect the unit itself for internal dam...

Page 6: ...proper balance and rigging before hoisting to desired location 6 Do s and don ts Do Tight the hoist rings screw to the recommended torque value Make sure that the hoist ring is free to pivot and swive...

Page 7: ...ight divided by the number of hoist rings The resultant force can be significantly greater at shallow lifting angles and with unevenly distributed loads L Load experienced by each hoist ring N Number...

Page 8: ...nterval the blower should be checked to ensure that it has remained in an acceptable stored condition The blower and motors should be rotated several times by hand while adding enough grease to replen...

Page 9: ...the dimensions indicated Discharge Sizes Unit size Unit Discharge Opening Size H X W Recommended Duct Size H X W 090 11 X 13 13 X 16 120 13 X 15 16 X 18 180 13 X 15 16 X 18 240 11 X 13 13 X 16 300 13...

Page 10: ...d 1 8 thick DURO 60 neoprene gasket or Tremco Butyl Sealant Installation of all ducts should be done in accordance with Best Practices and SMACNA Recommended Ductwork to Unit connection screws o Self...

Page 11: ...tions in the piping system to purge the air and avoid problems due to the presence of air in the water loop If the unit will remain operational at subfreezing ambient temperatures the water system mus...

Page 12: ...CAUTION Use Piping Strainers To prevent condenser damage pipe strainers must be installed in the water supplies to protect components from water borne debris AIR is not responsible for equipment damag...

Page 13: ...ety regulations Failure to do so may cause death serious personal injury or property damage and will void the warranty of the equipment AIR is not responsible for any damage caused by not following th...

Page 14: ...les colors conventions and any other information that is particular to the design Refer to electrical drawings for specific connections made inside each block or box The main power feeding the equipme...

Page 15: ...IOM PreciseAIR Page 15 of 50 2 13 Main Control Panel Layout and Components Figure 4 Main Control Panel Layout...

Page 16: ...ors should consider the following Mount sensors 5 0 above finished floor Do not locate wall mounted sensor in the direct path of supply air from the supply grilles Do not locate wall mounted sensor ad...

Page 17: ...r with replaceable drier core for durability in the most aggressive environmental applications High and Low Pressure Cutout Switches Each refrigerant circuit is equipped with a high and low pressure c...

Page 18: ...IOM PreciseAIR Page 18 of 50 Item Description 1 AHU Section 2 Compressor Section 3 Filter rack 4 Electrical enclosure 5 Air Filter Figure 5 Components Location...

Page 19: ...0 Item Description 1 Flex duct connection 2 Centrifugal blower 3 Blower motor with adjustable base one per blower 4 Thermal or electronic expansion valve 5 DX Evaporator coil 6 Drain pan Figure 6 AHU...

Page 20: ...Page 20 of 50 Item Description 1 Compressor 2 Sight glass moisture indicator 3 Solenoid valve 4 Filter drier 1 2 3 4 Figure 7 Compressor Section Internal Components Figure 8 Air Cooled Condenser may h...

Page 21: ...er 2 Scroll compressor 3 Filter drier 4 High pressure cutout switch 5 Ball valve with electronic actuator 6 Sight glass moisture indicator 7 Water regulation valve 8 Hose connecting high pressure to w...

Page 22: ...IOM PreciseAIR Page 22 of 50 Item Description 1 Low Pressure Sensor 2 High Pressure Sensor 3 Crankcase Heater 4 Compressor Oil Sight Glass 1 2 3 4 Figure 10 Compressor Details...

Page 23: ...r closes Depending on the size type and destination of the condensing unit fans may be energized individually or in pairs The first fan starts with signal from compressor contactor auxiliary contact 5...

Page 24: ...ntrolled blowers In those cases while in relative humidity control if the temperature leaving the coil is above setpoint even with compressors running at 100 the system will slow down the blowers and...

Page 25: ...systems fitted with Allen Bradley CompactLogix PLC and PanelView Touch HMI Sample graphic displays are shown below Contact AIR for details for your specific unit control system 3 4 Main All main vari...

Page 26: ...IOM PreciseAIR Page 26 of 50 3 5 Compressors Both compressors status are listed Some of the variables on this screen can also be seen on the main screen...

Page 27: ...IOM PreciseAIR Page 27 of 50 3 6 Setpoint Screens...

Page 28: ...IOM PreciseAIR Page 28 of 50...

Page 29: ...ted In those cases press RESET ALARMS pushbutton The equipment will enter a check routine and try to re start Two alarms require special treatment High pressure cut out alarm It requires the operator...

Page 30: ...it returns to the first screen of the loop To access a specific field within a screen press ENTER and the cursor will move and blink next to the value to be changed When the flashing cursor is next to...

Page 31: ...ronment evaporator entering air temperate from sensor mounted on the inlet of the filter rack and evaporator leaving temperature from sensor mounted on the top of the unit with the sensing element beh...

Page 32: ...tive water valve The controller opens the valve to lower the HP and closes the valve to increase the HP When heaters are available this screen displays the heaters variables Heater demand is the power...

Page 33: ...status to ENABLE There are 2 components for humidity control The first one is the humidity setpoint shown here as 40 0 and the differential for when the humidity control should start and stop Start hu...

Page 34: ...mum Output Hz increase divided by Maximum Frequency minus Minimum Frequency times 100 5 60 45 100 33 3 3 8 5 Alarms Alarms are intended to protect the equipment and the people working on it Some alarm...

Page 35: ...cursor to the NO position Using the arrows change it to YES A countdown will start Do not change it back to NO If you do so restart the procedure During the countdown the PLC will de energize the res...

Page 36: ...troubleshooting R_T room temperature R_RH room relative humidity E_In evaporator air entering temperature E_out evaporator air leaving temperature H_out heater air leaving temperature C1_LP compressor...

Page 37: ...Failure 9 Cmp2 Low Pressure Sensor Failure 10 Cmp1 Protection 11 Cmp1 Low Oil Flow 12 Cmp1 Overload SC 13 Cmp1 Low Pressure 14 Cmp1 High Pressure 15 Cmp1 High Pressure Switch 16 Cmp2 Protection 17 Cmp...

Page 38: ...ection is primarily for use with all non screw compressor models where the standard control panel and fault indication is used All systems with the optional PLC or all screw compressor models have a p...

Page 39: ...low charge If charge is low have the system checked for leaks and recharged by a refrigeration service technician 4 2 Evaporator dirty Clean chemically 4 3 Clogged liquid line filter drier Replace ca...

Page 40: ...is recommended to change the oil for the first time after approximately 100 operating hours During oil change also clean oil filters and magnetic plugs for compressors with integrated oil pump After...

Page 41: ...y brush off soft deposits such as algae or silt Use a cleaning agent if necessary Rinse well afterwards Rinse solid coatings such as lime or shell with suitable solvent The use of citric acid is very...

Page 42: ...at any device in the refrigerant line such as copper lines and fittings compressor condenser valves or coils it is important to replace the filter drier core Startup the machine operate for several mi...

Page 43: ...then be adjusted based on the condition of the purged grease The figure below illustrates the decal for ball bearings attached to the blower Observation of the condition of the grease expelled from u...

Page 44: ...l for dirt buildup corrosion and signs of excess stress or fatigue Clean the components and when appropriate apply new coatings Any addition of coatings or weld can create an imbalance Check the balan...

Page 45: ...ions form a foundation of the operations required for this type of equipment However it is not possible to give fixed and precise rules for permanent maintenance procedures capable of keeping all unit...

Page 46: ...vibration X Check for abnormal noise X Check compressor mounting X Compressor oil analysis X Change compressor oil X Y N Refrigeration Cycle Section Location Comment Check crankcase temperature X Che...

Page 47: ...eys and motor mounts X Check all fasteners set screw and locking collars for tightness X Motor fan bearing in good condition X Check airflow safety switch operation X Lubricate bearings X Y N Water Re...

Page 48: ...corrosion at support points bolts or between flanges X Check for coating or painting deterioration X Y N Structural Parts Location Comment Tighten all fasteners X Check all structural components used...

Page 49: ...IOM PreciseAIR Page 49 of 50 4 11 Maintenance Logs...

Page 50: ...ation and Maintenance IOM PreciseAIR Release Date 11 12 20 Advance Industrial Refrigeration 1765 Tobacco Rd Augusta GA 30906 706 364 0010 info air eng com 2020 Advance Industrial Refrigeration Inc All...

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