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AAON RN Series, Руководство по установке, эксплуатации и обслуживанию

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82 

VFD Controlled Condenser Fan Startup  

With Customer Provided Unit Controls the 
VFD’s are factory provided and factory 
programmed. VFD’s  receives input from 
pressure transducers on each refrigerant 
circuit and vary the fan speed based on the 
pressure inputs to maintain a discharge 
(head) pressure.  Standard pressure setpoint 
is 340 psi for standard air-cooled systems 
and 400 psi for modulating hot gas reheat 
air-cooled systems. 
 
With WattMaster Unit Controls the 
WattMaster Condenser Head Pressure 
Module is used to maintain a discharge 
pressure. The VFD should be factory wired 
to the outputs of the WattMaster Condenser 
Head Pressure Module. See WattMaster 
literature for additional information. 
(http://www.orioncontrols.com). 
 
With JENEsys Unit Controls the controller 
directly modulates the VFD to maintain a 
discharge pressure. 
 
 

 

 

Содержание RN Series

Страница 1: ...om a phone remote from the building Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department o Startup and service must be performed by a Factory Trained S...

Страница 2: ......

Страница 3: ...nd 30 ton Units 46 Electrical 47 Variable Speed Compressors 49 Thermostat Control Wiring 49 Gas Heating 50 Piping Sizing Examples 51 Inlet and Manifold Pressures 52 Gas Pressure Regulator Overpressure...

Страница 4: ...r Hot Water Preheating and Heating Operation 84 Modulating Electric Preheat 84 Chilled Water or Non Compressorized DX Cooling Operation 84 Maintenance 85 Gas Heating 85 Gas Heat Exchanger Removal 86 D...

Страница 5: ...able 19 SMO 254 Brazed Plate Heat Exchanger Water Connections 57 Table 20 Steam Coil Connection Sizes 59 Table 21 Hot Water Coil Connection Sizes 59 Table 22 Chilled Water Coil Connection Sizes 59 Tab...

Страница 6: ...30 ton Energy Recovery Wheel or Power Return Unit37 Figure 12 Lifting Details of a 26 31 50 60 and 70 ton Unit 38 Figure 13 Lifting Details of a 55 65 and 75 140 ton Unit 38 Figure 14 Duct Connection...

Страница 7: ...76 Figure 43 Gas Heater Instructions 80 Figure 44 Gas Heat Exchanger 86 Figure 45 Removal of a Condenser Fan Assembly 87 Figure 46 Evaporator Coil Access 88 Figure 47 9 25 and 30 ton Supply Fan 91 Fi...

Страница 8: ...lt in dangerous operation serious injury death or property damage Before servicing disconnect all electrical power to the furnace More than one disconnect may be provided When servicing controls label...

Страница 9: ...to the unit has been disconnected and fan wheel has stopped rotating WARNING During installation testing servicing and troubleshooting of the equipment it may be necessary to work with live electrical...

Страница 10: ...checked using suction and discharge gauges Fan motor rotation should be checked for proper operation Alterations should only be made at the unit power connection CAUTION Failure to properly drain and...

Страница 11: ...rdware with a pad lock always re install the nut bolt after closing the door CAUTION Do not clean DX refrigerant coils with hot water or steam The use of hot water or steam on refrigerant coils will c...

Страница 12: ...truction setup Verify furnace operating conditions including input rate temperature rise and ESP 8 Every unit has a unique equipment nameplate with electrical operational and unit clearance specificat...

Страница 13: ...3 60Hz 4 575V 3 60Hz 6 380V 3 50Hz 8 208V 3 60Hz 9 208V 1 60Hz 0 Standard Vertical Discharge and Return INTERIOR PROTECTION A Interior Corrosion Protection Vertical Discharge and Return Model Option...

Страница 14: ...4 Stage 1 Stage Auxiliary Heat E Modulating Lead VCC 1 Stage Aux Heat F Modulating All VCC 1 Stage Aux Heat H Single Serpentine 8 fpi J Half Serpentine 8 fpi K Single Serpentine 10 fpi L Half Serpenti...

Страница 15: ...Serpentine 12 fpi N Half Serpentine 12 fpi Feature 1 RETURN OUTSIDE AIR 0 Manually Adjustable OA Opening RA Opening 1A RETURN OUTSIDE AIR SECTION A Economizer B Econ Power Exhaust C Econ Power Return...

Страница 16: ...kward Curved Plenum D 22 Backward Curved Plenum F 27 Backward Curved Plenum G 22 Direct Drive Axial Flow H 35 5 Direct Drive Axial Flow J 15 BC Plenum 50 Width with Banding K 18 5 BC Plenum 70 Width w...

Страница 17: ...Enthalpy CO2 Override R DDC Actuator CO2 Override S Dual Minimum Position Potentiometers Fully Mod Act Sensible Limit T Dual Minimum Position Potentiometers Fully Mod Act Enthalpy Limit U 2 Position...

Страница 18: ...Backward Curved Plenum N 13 5 BC Plenum 70 Width P 24 BC Plenum 60 Width Q 27 BC Plenum 60 Width R 22 Backward Curved Plenum S 22 BC Plenum 70 Width T 17 Backward Curved Plenum U 17 BC Plenum 70 Widt...

Страница 19: ...E 2 Options C D E 3 Options A B C D 4 Options A B C E 5 Options A B D E 6 Options A C D E 7 Options B C D E 8 Options A B C D E 0 Standard Feature 8 REFRIGERATION OPTIONS A Hot Gas Bypass Lead Stage o...

Страница 20: ...Options A H K Options B H L Options C H M Options D H N Options A B H P Options A C H Q Options A B C H 0 Standard Feature 12 CONTROLS A Low Limit Controls B Phase and Brown Out Protection C Energy Re...

Страница 21: ...Zone Unit Controller VAV Cool VAV Heat 4 Field Installed DDC Controls by Others 5 Field Installed DDC Controls Furnished by Others with Isolation Relays 6 Factory Installed DDC Controls Furnished by O...

Страница 22: ...Standard None Feature 21 WATER COOLED CONDENSER A Balancing Valves B Water Flow Switch C Motorized Shut off Valve D Head Pressure Control E Options A B F Options A C G Options A D H Options B C J Opt...

Страница 23: ...BB 0 2 3 8 4 A0 0 0 D 0 B DEH 0 BA 0 D 0 0 0 0 L 0 0 0 0 B 0 0 0 0 0 B GEN Model Options Unit Feature Options B Standard AAON Gray Paint Feature 23 TYPE U Special Pricing Authorization Special Paint X...

Страница 24: ...hout cooling b Certified for outdoor installation only c Certified for installation on a combustible roof with a minimum of 12 high curb Certification of Cooling Models a Certified as a commercial cen...

Страница 25: ...b requirements If repairs must be made to damaged goods then the factory should be notified before any repair action is taken in order to protect the warranty Certain equipment alteration repair and m...

Страница 26: ...e may occur when power is restored If power to the unit must be off for more than an hour turn the thermostat system switch to OFF or turn the unit off at the control panel and leave the unit off unti...

Страница 27: ...air while operating If this amount of air is greatly reduced approximately 1 3 during the heating season the gas heat exchanger or electric heating coil may overheat and may cut the burner or heater...

Страница 28: ...0 1920 0 Wiring Diagrams Unit specific wiring diagrams are laminated and affixed inside the controls compartment door Condensate Drain Pan Unit requires drain traps to be connected to the condensate d...

Страница 29: ...Location Unit Size 6 8 and 10 tons Front Controls Side 48 Back Outside Air 36 Left Side 6 Right Side 48 Top Unobstructed Units with a water cooled condenser or chilled water coil require 48 of cleara...

Страница 30: ...c heating Units with hydronic heating require 70 right side access for service Figure 3 RN Series D Cabinet 26 31 50 60 and 70 tons Table 6 E Cabinet Unit Clearances Location Unit Size 55 65 and 75 14...

Страница 31: ...inch must be maintained between the outside edges of the duct and combustible material in accordance with National Fire Protection Association Standard No 90A Provide flashings or enclosure between st...

Страница 32: ...32 Figure 5 RN Series 6 8 and 10 ton Unit Gasket Locations...

Страница 33: ...33 Figure 6 RN Series 9 and 11 15 ton Unit Gasket Locations...

Страница 34: ...34 Figure 7 RN Series 16 25 and 30 ton Unit Gasket Locations...

Страница 35: ...35 Figure 8 RN Series 26 31 50 60 and 70 ton Unit Gasket Locations...

Страница 36: ...d 30 tons Lifting the Unit If cables or chains are used to hoist the unit they must be the same length Minimum cable length is 99 for 6 25 and 30 ton units and 180 for 26 and 31 50 60 and 70 ton units...

Страница 37: ...Lower the unit until the unit skirt fits around the curb Some units are designed to overhang the curb Take care that any recessed base rails fit around the curb Make sure the unit is properly seated o...

Страница 38: ...38 Figure 12 Lifting Details of a 26 31 50 60 and 70 ton Unit Figure 13 Lifting Details of a 55 65 and 75 140 ton Unit...

Страница 39: ...ld include the base insulation option or the base must be field insulated D and E cabinet 26 and 31 140 tons units include base insulation standard Figure 14 Duct Connection Do not drill or punch hole...

Страница 40: ...to ICC ES AC156 when using a seismic curb for seismic certifications to apply Any deviations or modifications to the unit or curb will void all seismic certification Structural engineer of record mus...

Страница 41: ...41 Figure 16 Seismic Solid Bottom Curb without Filters Cross Section Figure 17 Seismic Solid Bottom Curb without Filters Detail A Figure 18 Seismic Solid Bottom Curb without Filters Detail B...

Страница 42: ...42 Figure 19 Seismic Rigid Mount Curb...

Страница 43: ...old down and become a condenser coil shipping cover on 90 140 ton RN Series units with copper tube and aluminum fin condenser coils Condenser hail guards must be opened before startup of the unit Figu...

Страница 44: ...quirements 6 25 and 30 ton Units Remove the two screws at the bottom of the rain hood that secure it in the shipping position Remove the screws that attach the side pieces of the hood to the top of th...

Страница 45: ...n Rain Hood End Flashing Installation On RN Series E cabinet units that are 142 wide RN 55 65 75 90 105 120 130 140 the cabinet width will overhang the shipping trailer on each side In order to secure...

Страница 46: ...the intake of the rain hood Clips which hold the metal mesh filters in the filter rack should face outward Figure 26 Rain Hood with Metal Mesh Filter Rack Installation In order to prevent water leakag...

Страница 47: ...e unit base in the front left hand corner in the unit controls compartment The utility entry on 55 65 and 75 140 ton units is located in the center front of the unit See unit drawing for specific loca...

Страница 48: ...nt has been completed by the manufacturer and cannot be modified without effecting the unit s agency safety certification Supply voltage must be within the min max range shown on the unit nameplate Av...

Страница 49: ...per operation Control voltage returning from controller circuit must be a minimum of 21 VAC To assure proper wiring use the following chart to determine the allowable wiring distances Table 8 Control...

Страница 50: ...in accordance with local codes or in the absence of local codes installation must conform to the current United States National Fuel Gas Code ANSI Z223 1 NFPA 54 or the current Canada National Fuel P...

Страница 51: ...5 160 135 1 1 4 950 580 400 325 280 1 1 2 1460 900 620 500 430 2 2750 1680 1150 950 800 2 1 2 4350 2650 1850 1500 1280 Table 15 Propane kBtu hr Maximum Piping Capacities Specific Gravity 1 52 Supply P...

Страница 52: ...3 w c and less than 2 psi 55 4 w c Regulators must comply with the latest edition of the Standard for Line Pressure Regulators ANSI Z21 80 CSA 6 22 Both a gas pressure regulator and overpressure prote...

Страница 53: ...tions The condensate drain connection is located next to the gas entry location For 6 50 60 and 70 ton units the heat exchanger condensate drain connection from the unit is a 5 8 barbed nylon elbow co...

Страница 54: ...r loop temperature of 70 F Open Loop Applications This product contains one or more refrigerant to water heat exchangers made of 316 Stainless Steel 316 Stainless Steel is subject to severe corrosion...

Страница 55: ...ore refrigerant to water heat exchangers A refrigerant to water heat exchanger contains refrigerant in one passage and water in another passage Water is subject to freezing at 32 F When water freezes...

Страница 56: ...e Glycol Propylene Glycol 20 18 F 19 F 30 7 F 9 F 40 7 F 6 F 50 28 F 27 F Water loop piping runs through unheated areas or outside the building should be insulated Water Piping Installing contractor m...

Страница 57: ...rainer with a minimum of 20 Mesh ahead of the condenser inlet to prevent condenser fouling and internal tube damage Mineral content of the condenser water must be controlled All makeup water has miner...

Страница 58: ...type cement should be used to join the drain pipe connections Drainage of condensate directly onto the roof may be acceptable in certain areas refer to local codes If condensate is to drain directly...

Страница 59: ...1 3 8 016 018 020 025 030 1 5 8 026 031 040 050 060 070 2 1 8 standard 1 3 8 preheat coil 055 065 075 090 105 120 130 140 2 1 8 Chilled Water Coil Four or six row chilled water cooling coils can be f...

Страница 60: ...crolling through the following displays 1 LAT Measured leaving air temperature LAT average of LAT A and B probes MOD Modulation rate currently being applied to stage one SCR 2 WKGset Working LAT setpo...

Страница 61: ...s 0 indicates normal operation 1 6 corresponds to stages 1 6 being forced on Stage 1 the SCR is forced to 50 System Setting Screens These screens are access by pressing the up button and then entering...

Страница 62: ...N 60 kW P 70 kW 4 Q 80 kW R 90 kW 5 S 100 kW T 110 kW 6 U 120 kW 4 LATset Leaving air temperature setpoint Range 35 F 80 F and the default is 50 F 5 OATset Outside air temperature setpoint Range 35 F...

Страница 63: ...ort 3 OAT sensor open short 4 Leaving air temp over limit 5 Cooling down after hi limit event 6 LAT below low limit 7 Stage 1 only recovery after mechanical limit 8 Shutdown after too many hi limit ev...

Страница 64: ...rs and preheat discharge supply air temperature sensors are factory installed and wired to the preheat controller Electric preheat has maximum operating outside air temperature of 60 F and a maximum p...

Страница 65: ...rotates at approximately 30 RPM If the wheel does not rotate when power is applied it may be necessary to readjust the diameter air seals Air Seal Adjustments Pile type air seals across both sides of...

Страница 66: ...are All cassettes should be lifted by the bearing support beam Holes are provided on both sides of the bearing support beams to facilitate rigging as shown in the following illustration Lifting Hole L...

Страница 67: ...ss surface of segment to separate polymer strips for better cleaning action Rinse dirty solution from segment and remove excess water before reinstalling in wheel Air Seals Four adjustable diameter se...

Страница 68: ...nch dimension C racking must be corrected to ensure that drive belt will not disengage from wheel Operation Startup Procedure 1 By hand turn wheel clockwise as viewed from the pulley side to verify wh...

Страница 69: ...e for segment removal 1 Unlock two segment retainers one on each side of the selected segment opening 2 With the embedded stiffener facing the motor side insert the nose of the segment between the hub...

Страница 70: ...ate 2 Using hexagonal wrench loosen set screw in bearing locking collar Using light hammer and drift in drift pin hole tap collar in the direction of wheel rotation to unlock collar Remove collar 3 Us...

Страница 71: ...71 12 Apply power to wheel and ensure that the wheel rotates freely without interference Belt Replacement...

Страница 72: ...rogram in AAON ECat to determine the new band size for the required cfm and static pressure The following photos of a wheel are provided for practical guidelines only in order to identify the air band...

Страница 73: ...ECat Step 2 Maintain the balance of fan Mark the HUB RET castings across a single joint so the fan can be reassembled in the same orientation Mark the location of any balancing weight Balancing weigh...

Страница 74: ...o the shaft and typically contains either setscrews or a center tapered hole where the bushing inserts Location A is with the bushing mount on air inlet side of the fan Location B is with the bushing...

Страница 75: ...heir previous locations Tighten bolts in a cross pattern to 5 6 ft lbs of torque Power Return and Exhaust Axial Flow Fans 26 and 31 140 tons Blade Pitch Angle Setting Instructions Step 1 Determine the...

Страница 76: ...ce the key in the shaft make sure the screw on the bushing is aligned over the key and then tighten the screw to 9 ft lbs torque Filters Do not operate the unit without filters in place Unit should be...

Страница 77: ...Sub Cooling Read the gauge pressure at the liquid line close to the point where the temperature was taken You must use liquid line pressure as it will vary from discharge pressure due to condenser coi...

Страница 78: ...erheat Temperatures Correct an overcharged system by reducing the amount of refrigerant in the system to lower the sub cooling The system is undercharged if the superheat is too high and the sub cooli...

Страница 79: ...0 611 9 381 7 31 98 8 56 2 61 172 5 103 5 91 277 6 171 0 121 422 5 263 5 32 100 9 57 5 62 175 4 105 4 92 281 7 173 7 122 428 2 267 1 33 102 9 58 8 63 178 4 107 3 93 285 9 176 4 123 433 9 270 7 34 105...

Страница 80: ...80 Gas Heater Instructions Figure 43 Gas Heater Instructions...

Страница 81: ...ormation http www orioncontrols com With JENEsys Unit Controls the controller modulates the ECM to maintain head pressure Note High voltage wires out of the motor Black Brown 1 Phase Line Voltage Gree...

Страница 82: ...re setpoint is 340 psi for standard air cooled systems and 400 psi for modulating hot gas reheat air cooled systems With WattMaster Unit Controls the WattMaster Condenser Head Pressure Module is used...

Страница 83: ...the heating season Night and Weekend Unoccupied Operation Packaged DX Cooling Operation and Control When a call for cooling G and Y1 Y2 etc is made the supply blower motors and compressors will energ...

Страница 84: ...move power from all contactors Steam or Hot Water Preheating and Heating Operation Valve control for steam and hot water heating coils are by others Heating is accomplished by passing steam or hot wat...

Страница 85: ...extensions are used they must meet category III requirements This appliance contains a wire screen at the vent outlet Each heating season prior to placing the appliance in heat mode maintenance check...

Страница 86: ...n the heat exchanger If flexible gas piping in the unit must be replaced connectors cannot be reused only new connectors must be used Connect wiring per the wiring diagram on the controls compartment...

Страница 87: ...ntrol panel Attach the orifice to the condenser assembly using all of the points where screws were removed Reconnect the fan motor wires Attach the fan grill at all of the points where screws were rem...

Страница 88: ...ss side coil blank off panels upstream of the coil Reinstall economizer damper assembly if necessary Connect the suction and liquid copper connections to the evaporator coil Reinstall the TXV bulbs on...

Страница 89: ...is less than 130 F and pressure is than 900 psig to avoid damaging the fin edges An elevated water temperature not to exceed 130 F will reduce surface tension increasing the ability to remove chlorid...

Страница 90: ...tted After the substrate has been thoroughly wetted the salts will be soluble and is now only necessary to rinse them off Rinse It is highly recommended that a hose be used as a pressure washer will d...

Страница 91: ...an opening Remove the brace located at the fan opening Remove the six bolts that connect the motor mount to the blower frame Two bolts are on the angle on the back of the motor mount box two are on th...

Страница 92: ...s 10 Adjust the bottom knob labeled RESTART DELAY For automatic restart after recovery of voltage select from 2 seconds up to 5 minutes After recovery of line voltage this is how long the monitor will...

Страница 93: ...ssor Controller Units with variable capacity scroll compressors may include the following compressor controller The following is an explanation of the terminals and troubleshooting alert flash codes o...

Страница 94: ...12 sec 3 sec 80 5 00 100 0 15 sec 0 sec 100 Figure 51 Compressor Controller Flash Code Details Filter Replacement Monthly air filter inspection is required to maintain optimum unit efficiency It is st...

Страница 95: ...ide Air C 2 49 x 20 x 5 16 Lint Screen with RAB Feature A2 Q R 3 47 x 12 x 5 16 Table 32 16 25 and 30 ton Pre Filters Feature 6A Quantity Size Type 0 No Pre Filters A 6 20 x 25 x 2 Pleated 30 Eff MERV...

Страница 96: ...H No Pre Filters A A B C F G H 15 20 x 24 x 2 5 16 x 20 x 2 Pleated 30 Eff MERV 8 B A B C F G H 56 20 x 20 x 1 Metal Mesh Outside Air C A C 8 40 x 18 8 20 x 18 Lint Screen C B F G H 1 60 x 16 3 60 x...

Страница 97: ...Filter Frame Replaceable Media with RAB Feature A2 Q R 2 20 x 20 x 2 and 1 12 x 24 x 2 F 4 16 x 20 x 4 Pleated 65 Eff MERV 11 G Pleated 85 Eff MERV 13 H Pleated 95 Eff MERV 14 Table 39 9 and 11 ton U...

Страница 98: ...2 x 24 x 2 F 4 20 x 25 x 4 Pleated 65 Eff MERV 11 G Pleated 85 Eff MERV 13 H Pleated 95 Eff MERV 14 Table 41 16 25 and 30 ton Unit Filters Feature 6B Quantity Size Type 0 6 20 x 25 x 2 Pleated 30 Eff...

Страница 99: ...24 x 4 Pleated 95 Eff MERV 14 with RAB Feature A2 Q R 16 12 x 24 x 4 Table 43 50 60 and 70 ton Unit Filters Feature 6B Quantity Size Type 0 24 12 x 24 x 2 Pleated 30 Eff MERV 8 B 24 12 x 24 x 4 Pleate...

Страница 100: ...1 25 x 16 x 4 Pleated 30 Eff MERV 8 With Energy Recovery Wheel Exhaust Air Filters Feature 6A D F G OA 1 25 x 16 x 2 EA 1 25 x 16 x 2 Table 47 9 and 11 15 ton Energy Recovery Wheel Filters Feature 1A...

Страница 101: ...Feature 1A Quantity Size Type F G H J Q R S T 10 24 x 24 x 2 Pleated 30 Eff MERV 8 With Energy Recovery Wheel Exhaust Air Filters Feature 6A D G OA 10 24 x 24 x 2 EA 14 25 x 16 x 2 U V W Y Z 1 2 3 10...

Страница 102: ...ream side of the cooling coil Replacement Parts Parts for AAON equipment may be obtained from AAON at www aaonparts com When ordering parts reference the unit serial number and part number AAON Warran...

Страница 103: ...orrosion problems may occur especially when more factors are valued 0 Use is not recommended Water Containing Concentration mg l or ppm Time Limits Analyze Before AISI 316 SMO 254 Copper Alloy Nickel...

Страница 104: ...it 0 2 0 Manganese Mn 0 1 No Limit 0 1 0 Chloride Content Chloride Content Maximum Temperature 60 C 140 F 80 C 176 F 120 C 248 F 130 C 266 F 10 ppm SS 304 SS 304 SS 304 SS 316 25 ppm SS 304 SS 304 SS...

Страница 105: ...107 44 25 77 86 00 30 86 69 28 35 95 56 16 40 104 45 81 45 113 37 58 50 122 30 99 55 131 25 68 60 140 21 40 65 149 17 91 Deg C Deg F Resistance kOhms 70 158 15 07 75 167 12 73 80 176 10 79 85 185 9 2...

Страница 106: ...vel Yes No 3 Are the unit clearances adequate for service and operation Yes No 4 Do all access doors open freely and are the handles operational Yes No 5 Have all electrical connections been tested fo...

Страница 107: ...nomizer Changeover Type and Operations Damper Wiring Check Gears Check Ambient Temperature Ambient Dry Bulb Temperature ________ F Ambient Wet Bulb Temperature ________ F Unit Configuration Water Cool...

Страница 108: ...d N A Refrigeration System 4 Cooling Mode Pressure Saturated Temperature Line Temperature Sub cooling Superheat Discharge N A N A Suction N A Liquid N A Refrigeration System 1 Heating Mode Heat Pump o...

Страница 109: ...ed with fluid Yes No 3 Has air been bled from the heat exchangers and piping Yes No 4 Is the glycol the proper type and concentration N A if water Yes No 5 Is there a minimum load of 50 of the design...

Страница 110: ...th the unit It is the responsibility of the owner and or maintenance service contractor to document any service repair or adjustments AAON Service and Warranty Departments are available to advise and...

Страница 111: ...R79510 June 2009 Update of the IOM making corrections to some of the values in the tables of Appendix A and adding e coated coil cleaning instructions August 2009 Update of the IOM correcting the Gas...

Страница 112: ...VFD controlled and ECM driven condenser fan information November 2012 Update of the IOM adding information about compressor cycling June 2013 Added options to the feature string added curb gasket inf...

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Страница 116: ...the intent of AAON to provide accurate and current product information However in the interest of product improvement AAON reserves the right to change pricing specifications and or design of its pro...

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