AAON RZ Series Installation Operation & Maintenance
  1. Manuals
  2. Brands
  3. AAON Manuals
  4. Air Handlers
  5. RZ Series
  6. Installation operation & maintenance

AAON RZ Series Installation Operation & Maintenance

Packaged rooftop units & outdoor air handling units
Hide thumbs Also See for RZ Series:
Table of Contents

Advertisement

Quick Links

Download this manual
Packaged Rooftop Units & Outdoor Air Handling Units
Installation, Operation,
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings
exactly could result in serious
injury, death or property damage.
Be sure to read and understand
the installation, operation and
service instructions in this manual.
Improper installation, adjustment,
alteration, service or maintenance
can cause serious injury, death or
property damage.
A copy of this IOM must be kept
with the unit.
& Maintenance
o Do not store gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance
o WHAT TO DO IF YOU SMELL GAS
 Do not try to light any appliance.
 Do not touch any electrical switch; do not
use any phone in your building.
 Leave the building immediately.
 Immediately call your gas supplier from 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 Service Technician.
RZ SERIES
WARNING

Advertisement

Table of Contents
loading

Related Manuals for AAON RZ Series

Summary of Contents for AAON RZ Series

  • Page 1 RZ SERIES Packaged Rooftop Units & Outdoor Air Handling Units Installation, Operation, & Maintenance WARNING WARNING o Do not store gasoline or other flammable FIRE OR EXPLOSION HAZARD vapors and liquids in the vicinity of this or any other appliance...

  • Page 3: Table Of Contents

    Table of Contents Table of Contents AAON® RZ Series Features and Options Introduction ..............7 Safety .............................. 8 RZ Series Feature String Nomenclature ..................14 General Information ........................25 Codes and Ordinances ......................26 Receiving Unit .......................... 26 Storage ............................27 Packaged Direct Expansion (DX) Units ...................
  • Page 4 Replacement Parts ........................83 Appendix A - Heat Exchanger Corrosion Resistance ..............84 Appendix B - Thermistor Temperature vs. Resistance Values ............. 86 RZ Series Startup Form ........................ 87 Maintenance Log (E-Coated Coil) ....................94 Literature Change History......................95 G074290 · Rev. A · 200914...
  • Page 5 Table 21 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling Values ....61 Table 22 - Filter Drier Maximum Pressure Drop ..................62 Table 23 - R-410A Refrigerant Temperature-Pressure Chart ..............64 Table 24 - EC Condenser Fan Cycling Options ..................66 Table 26 - RZ Series Filter Sizes ........................ 83...
  • Page 6 Figure 1 - RZ Series Unit Orientation ......................30 Figure 2 - Base Rail Lifting Lug ......................... 31 Figure 3 - 4 Point Lift RZ Series Air-Cooled Condenser Unit ..............32 Figure 4 - 8 Point Lift RZ Series Air-Cooled Condenser Unit ..............33 Figure 5 - Curb Mounting ...........................

  • Page 7: Aaon® Rz Series Features And Options Introduction

    AAON® RZ Series Features and Options Introduction Energy Efficiency Installation and Maintenance  Direct Drive Airfoil Plenum Supply Fans Clogged Filter Switch   Variable Speed R-410A Scroll  Color Coded Wiring Diagram Compressors  Compressors in Isolated Compartment AAON Evaporative Condenser ...

  • Page 8: Safety

    Safety Attention must be paid to the following statements: NOTE - Notes are intended to clarify the unit installation, operation and maintenance. CAUTION - Caution statements are given to prevent actions that may result in equipment damage, property damage, or personal injury. WARNING - Warning statements are given to prevent actions that could result in equipment damage, property damage, personal injury or death.
  • Page 9 WARNING WARNING FIRE, EXPLOSION OR CARBON During installation, testing, servicing, MONOXIDE POISONING HAZARD and troubleshooting of the equipment it may be necessary to work with live Failure to replace proper controls electrical components. Only could result in fire, explosion or qualified licensed electrician...
  • Page 10 WARNING WARNING GROUNDING REQUIRED UNIT HANDLING All field installed wiring must be To prevent injury or death, lifting completed by qualified personnel. equipment capacity must exceed unit Field installed wiring must comply with weight by an adequate safety factor. NEC/CEC, local and state electrical Always test-lift unit not more than 24 code requirements.
  • Page 11 WARNING CAUTION WATER PRESSURE Do not clean DX refrigerant coils with hot water or steam. The use of hot Prior to connection of condensing water or steam on refrigerant coils will water supply, verify water pressure is cause high pressure inside the coil less than maximum pressure shown tubing and damage to the coil.
  • Page 12 WARNING OPEN LOOP APPLICATIONS Failure of the condenser as a result of chemical corrosion is excluded from coverage under AAON Inc. warranties heat exchanger manufacturer’s warranties. WARNING WATER FREEZING Failure of the condenser due to freezing will allow water to enter the...
  • Page 13 1. Startup and service must be performed by 8. Every unit has a unique equipment a Factory Trained Service Technician. nameplate with electrical, operational, unit clearance specifications. 2. Use only with type of the gas approved Always refer to the unit nameplate for for the furnace.

  • Page 14: Rz Series Feature String Nomenclature

    RZ Series Feature String Nomenclature A - 0 0 0 0 0 : N 0 - A A K A Q - J 0 0 - B F T 0 M - 0 0 0 0 0 - Q F - A 0 A A...
  • Page 15 RZ Series Feature String Nomenclature : N 0 - A A K A Q - J 0 0 - B F T 0 M - 0 0 0 0 0 - Q F - A 0 A A 0 0 0 0 0...
  • Page 16 RZ Series Feature String Nomenclature A Q - J 0 0 - B F T 0 M - 0 0 0 0 0 - Q F - A 0 A A N 0 - A A K RZ A - 145 - D...
  • Page 17 RZ Series Feature String Nomenclature A Q - J 0 0 - B RZ A - 145 - D 0 - 3 - C A B 0 A - 0 0 0 0 0 : N 0 - A A K...
  • Page 18 RZ Series Feature String Nomenclature 0 - 3 - C A B 0 A - 0 0 0 0 0 : N 0 - A A K A Q - J 0 0 - B F T 0 M - 0 0 0...
  • Page 19 RZ Series Feature String Nomenclature 0 - 3 - C A B 0 A - 0 0 0 0 0 : N 0 - A A K A Q - J 0 0 - B F T 0 M - 0 0 0...
  • Page 20 RZ Series Feature String Nomenclature 0 - 3 - C A B 0 A - 0 0 0 0 0 : N 0 - A A K A Q - J 0 0 - B F T 0 M - 0 0 0 0 0 - Q F - A...
  • Page 21 RZ Series Feature String Nomenclature 0 - 3 - C A B 0 A - 0 0 0 0 0 : N 0 - A A K A Q - J 0 0 - B F T 0 M - 0 0 0 0 0 - Q F - A 0 A A...
  • Page 22 RZ Series Feature String Nomenclature 0 - 3 - C A B 0 A - 0 0 0 0 0 : N 0 - A A K A Q - J 0 0 - B F T 0 M - 0 0 0 0 0 - Q F - A 0 A A...
  • Page 23 RZ Series Feature String Nomenclature 0 - 3 - C A B 0 A - 0 0 0 0 0 : N 0 - A A K A Q - J 0 0 - B F T 0 M - 0 0 0 0 0 - Q F - A 0 A A...
  • Page 24 Insulation + 6” Base Rail 37: SPECIALS & PAINT B = Premium AAON Gray Paint Exterior D = Premium AAON Gray Paint Exterior + Painted Interior Air Tunnel X = SPA + Premium AAON Gray Paint Exterior 4 = SPA + Special Exterior Paint Color...

  • Page 25: General Information

    Models roofs. a. Certified as a forced air heating system with or without cooling. WARNING b. RZ Series hot water coils are designed for operation with no more than 180°F water at a 150 psig working pressure. Improper installation, adjustment, c.

  • Page 26: Codes And Ordinances

    Codes and Ordinances The RZ Series has been tested and certified WARNING by Intertek (ETL) to the following safety standards: Coils and sheet metal surfaces present sharp edges and care must ANSI Z21.47-2016/CSA 2.3-2016 be taken when working with this Gas-Fired Central Furnaces equipment.

  • Page 27: Storage

    all doors with locks or nuts and bolts to CAUTION prevent unauthorized access. CRANKCASE HEATER Storage OPERATION If installation will not occur immediately following delivery, store equipment in a dry Some units equipped with protected area away from construction traffic compressor crankcase heaters, which and in the proper orientation as marked on the must be energized at least 24 hours...

  • Page 28: Gas Or Electric Heating

    builds up, oil is washed out of the mounted at the heat exchanger and supply compressor, leaving it starved for lubrication. blower areas. Compressor life will be shorted by reduced Adjust airflow after installation to obtain an lubrication and the pumping of excessive air temperature rise within the range amounts of liquid oil and refrigerant.

  • Page 29: Wiring Diagrams

    7 = Heat 7 2880 2333 water. 8 = Heat 8 3420 2770 Installation Table 3 - RZ 145-240 ton Gas Heating AAON equipment is designed to be easily Capacities installed and serviced. Model Gas Heat Option B3 Capacity Locating Units Input...

  • Page 30: Curb Installation

    12” off the Left Side ground/roof. Flue gas is dangerously hot and contains Figure 1 - RZ Series Unit Orientation containments. The user is responsible for determining if vent gases may degrade Condenser coils and fans must be free of any building materials.

  • Page 31: Lifting The Unit

    Construction Standards for curb installation unit to reduce vibration from the unit to the details. building. Lifting the Unit CAUTION CAUTION All roofing work must be performed by competent roofing contractors Incorrect lifting can cause damage to avoid any possible leakage. the unit.

  • Page 32: Figure 3 - 4 Point Lift Rz Series Air-Cooled Condenser Unit

    Figure 3 - 4 Point Lift RZ Series Air-Cooled Condenser Unit...

  • Page 33: Figure 4 - 8 Point Lift Rz Series Air-Cooled Condenser Unit

    Figure 4 - 8 Point Lift RZ Series Air-Cooled Condenser Unit Lifting slot locations are unit specific. Unit must be rigged at all marked lifting points.

  • Page 34: Duct Connection

    Duct Connection Figure 5 - Curb Mounting Figure 6 - Curb Detail Table 6 - Mounting Dimensions Tons 100” 96” 92” 97” 45-140 142” 138” 134” 139” 145-240 Figure 7 - Curb & Steel Mounting Rail with Dimensions...

  • Page 35: Reassembling Split Units

    Reassembling Split Units 6. Apply butyl caulking to all seams and Some RZ Series units are built and shipped in perimeter of splice and to the perimeter of two separate sections. the roof splice cap against the roof of the unit.

  • Page 36: Refrigeration Split Installation Procedure

    2. Next remove the copper caps on each side Refrigeration Split Installation Procedure If a given unit is too large to be shipped on by using a pipe cutter at the brazed joint one truck bed, the unit must be split. If the (Joint A and B).

  • Page 37: Outside Air Rain Hood

    End Flashing Installation CAUTION On RZ Series D and E cabinet units which are 142” wide (RZ-145, 160, 180, 200, 220, 240) All wire terminations MUST BE made the cabinet width will overhang the trailer on before applying power to the unit. The each side.

  • Page 38: Vestibule Exhaust Fan

    above the motorized exhaust. Upon screwing Vestibule Exhaust Fan Prior to unit operation of units with service the rain hood into place over the motorized vestibules the exhaust fan shipping support exhaust, apply a seal of butyl caulking around must be removed from the exterior of the the edges of the rain hood.

  • Page 39: Electrical

    Electrical Verify the unit nameplate agrees with power supply. Connect power and control field wiring as shown on the unit specific wiring diagram provided laminated and attached to the door in the controls compartment. Table 7 - Nameplate Voltage Markings & Tolerances Acceptable Performance Nominal Operating Voltage Range...

  • Page 40: Figure 15 - Power Block

    Note: All units are factory wired for Three phase voltage imbalance will cause 208/230V, 460V, or 575V. If unit is to be motor overheating and premature failure. connected to a 208V supply, the transformer The maximum allowable imbalance is 2%. must be rewired to 208V service.

  • Page 41: Variable Speed Compressors

    25-88 Hz 25-92 Hz Variable Speed Compressors Variable speed compressors with VFD speed control are standard on RZ Series units. Variable speed compressors should not be CAUTION operated outside the factory determined turndown ratio or frequency range. The No variable speed compressor shall factory determined compressor VFD ranges operate below 25 Hz.

  • Page 42: Gas Heating

    Unit Rating Sheet, which shipped. Above 2,000 ft the input rate is can be obtained from the AAON sales adjusted 4% for every 1,000 ft. representative. Table 11 - Natural Gas Maximum Piping Capacities (ft /hr) - Specific Gravity = 0.6, Supply Pressure ≤...

  • Page 43: Piping Sizing Example

    Table 12 - Propane (kBtu/hr) Maximum Piping Capacities Specific Gravity = 1.52, Supply Pressure = 11” w.c., Pressure Drop, 0.5” w.c. Length of Pipe Pipe Size 20 ft 50 ft. 100 ft. 150 ft. 200 ft. 1-1/4” 1495 1-1/2” 2295 1415 2”...

  • Page 44: Piping Supports

    Piping must not be strained or bent. AAON gas fired heat exchangers are designed to be non-condensing. These heat Table 13 - Piping Support Intervals exchangers are mounted downstream of the Support cooling coils.

  • Page 45: Leak Testing

    depending on national and local code DANGER requirements and the application of the final user. This condensate can stain the roof and Do not use open flame or other source it can cause rust in some cases on metal roofs. of ignition for leak testing.

  • Page 46: Rain Hoods

    Installation of the gas heaters must be adjusted to obtain an air temperature rise within the range specified on the rating plate. Rain Hoods Gas heating units include factory provided exterior rain hoods. The hoods are fastened in place with sheet metal screws. Higher heating capacity units will have two banks of gas fired heat exchanges (see Figure 16).

  • Page 47: Draw-Through Coils

    Draw-Through Coils CAUTION Unit must not be operated without a p- trap. Failure to install a p-trap may result in overflow of condensate water into the unit. All drain connections must be used and individually trapped to ensure a minimum amount of condensate accumulation in the drain pans.

  • Page 48: Table 14 - Draw-Through Drain Trap Dimensions

    Table 14 - Draw-Through Drain Trap Dimensions Draw-Through Drain Pan Pressure Trap Dimensions Negative Static (inches of water) (inch) (inch) -0.50 1.50 0.75 -1.00 2.00 1.00 -1.50 2.50 1.25 -2.00 3.00 1.50 -2.50 3.50 1.75 -3.00 4.00 2.00 Figure 19 - Blow-Through Drain Trap -3.50 4.50 2.25...

  • Page 49: Heating Coils

    Heating Coils One or two row hot water and steam heating and preheating coils can be factory installed. All valve controls for heating operation are field supplied and field installed. Water coils should not be subjected to entering air temperatures below 38°F to prevent coil freeze-up.

  • Page 50: Aluminum Energy Recovery Wheel

    Aluminum Energy Recovery Wheel This section is provided to assure the energy recovery feature will be properly setup to perform in accordance with the job specifications for your particular application. Figure 20 - Aluminum Energy Recovery Wheel 1. Monolith energy recovery wheel 2.
  • Page 51 2. Install the purge sector and match its Purge Sector Installation To install a purge sector: cutaways with the mounting holes on 1. Detach brush plate from the profile the profile. They should line up. starting with unscrewing the screws. 3.

  • Page 52: Polymer Energy Recovery Wheel

    The Energy Recovery Cassette consists of a Polymer Energy Recovery Wheel This section is provided to assure the energy frame wheel, wheel drive system, and energy recovery feature will be properly setup to transfer segments. Segments are removable perform in accordance with the job for cleaning or replacement.
  • Page 53 1. Loosen the three purge adjusting screws. 2. Adjust purge sector to the specified If it is necessary to adjust a purge seal to the angle. face of the wheel, loosen the two or three screws along the bearing beam and adjust to the proper distance from the media surface.
  • Page 54 Wheel to Air Seal Clearance Frame Bearing beams shown racked To check wheel to seal clearance; first disconnect power to the unit, in some units the energy recovery wheel assembly can be pulled out from the cabinet to view the air Wheel seals.

  • Page 55: Startup

    MUST BE Curved Fans secured by bending the tabs over from the RZ Series units are equipped with direct drive back side of the wheel and also MUST BE backward curved fan assemblies that are...

  • Page 56: Table 19 - Plenum Fan Set Screw Specifications

    Figure 22 - Air Volume Band If the band is field installed, a hand held pop- rivet tool is recommended for connecting the Figure 24 - Securing Air Volume Band Ends band ends together. Caution must be taken to assure that the band is tightly installed and no For single set screw applications, tighten the damage, denting or alteration to the wheel or set screw to the required torque setting (...

  • Page 57: Back Draft Damper Setup

    The gap tolerances that are allowed between The back draft damper will remain open with the blower and the inlet cone for the RZ no back pressure on the damper. The damper plenum fan blowers are shown in Figure 25. will close completely when back pressure is The inlet cone can be moved as necessary to applied.

  • Page 58: Filters

    wheel turns freely through 360º Filters Do not operate the unit without filters in rotation. place. Unit must be checked for correct filter 2. Before applying power to drive motor, placement during startup. Operation of the confirm wheel segments are fully equipment without filters will result in engaged in wheel frame and segment clogged cooling and heating coils.

  • Page 59: Adjusting Refrigerant Charge

    Before Charging Unit being charged must be at or near full load conditions before adjusting the charge. Units equipped with hot gas reheat must be charged with the hot gas reheat valves closed while the unit is in cooling mode to get the proper charge.

  • Page 60: Checking Evaporator Superheat

    Subtract the measured liquid line temperature CAUTION from the saturated temperature to determine the liquid sub-cooling. Expansion valve must be adjusted to approximately 8-15°F suction Compare calculated sub-cooling to the table superheat. Failure to have sufficient below for the appropriate unit type and superheat will damage...

  • Page 61: Adjusting Sub-Cooling And Superheat Temperatures

    Table 18 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub- Cooling Values Cooling Mode Liquid Sub-Cooling Values(°F) Evaporator Coil Saturation Temperature (°F) Ambient (°F) 9 - 14 8 - 13 8 - 13 7 - 12 5 - 10 10 - 15 9 - 14 9 - 14 8 - 13...

  • Page 62: Refrigerant Filter Driers

    Refrigerant Filter Driers Each refrigerant circuit contains replaceable core liquid line filter drier. Replace when there is excessive pressure drop across the assembly or moisture is indicated in a liquid line sight glass. Table 19 - Filter Drier Maximum Pressure Drop Circuit Loading Max Pressure Drop 100%...

  • Page 63: Suction Filter

    BD filter element for the lowest possible pressure drop. Removing the suction line filter will improve the efficiency and capacity of the unit. AAON installs isolation ball valves on both sides of the suction line filter so the complete system will not have to be reclaimed/evacuated.

  • Page 64: Freeze Stat Startup

    Table 20 - R-410A Refrigerant Temperature-Pressure Chart °F PSIG °F PSIG °F PSIG °F PSIG °F PSIG 78.3 134.7 213.7 321.0 463.2 80.0 137.2 217.1 325.6 469.3 81.8 139.7 220.6 330.2 475.4 83.6 142.2 224.1 334.9 481.6 85.4 144.8 227.7 339.6 487.8 87.2...

  • Page 65: Indirect Gas Heat Startup

    Indirect Gas Heat Startup...

  • Page 66: Vfd Controlled Condenser Fan Startup

    Module is used to maintain a discharge Green - Ground pressure. The VFD should be factory wired to the outputs of the AAON Condenser Head Low control voltage wires out of the motor: Blue – Common Pressure Module. See AAON literature for Yellow –...

  • Page 67: Access Doors

    Access Doors Lockable access doors are provided to the services vestibule and to sections of the unit which may require maintenance or servicing. After startup is completed, if necessary, use locks to prevent unauthorized access. A separate access door is also provided to the evaporator pumping package...

  • Page 68: Operation

    Steam or Hot Water Preheating and Operation Heating Operation Unit operations must be controlled with a unit Valve control for steam and hot water heating controller, never at the main power supply, coils are by others. Heating is accomplished except for emergency or complete shutdown by passing steam or hot water through the of the unit.

  • Page 69: Energy Recovery Wheel Defrost Timer

    Energy Recovery Wheel Defrost Timer Setting Set Mode to D T1 is the on time  Set T1 range to 10m (10 minutes)  The scale should show 0-6 on the dial  Set T1 dial to 3 which equals 30 minutes of run time Figure 33 - Temperature Dial T2 is the off time...

  • Page 70: Maintenance

    Cleaning must only be done by a qualified service agency and only after The combustion ventilation motor will consultation with AAON service enable. The control will automatically supply representative. power to the igniter and the gas valve after...

  • Page 71: Gas Heat Exchanger Removal

    If induced draft blower/motor assembly has Insert heat exchanger into opening so that the to be replaced, care must be taken to provide back of the main plate is against the unit an airtight seal between the blower housing bulkhead. and the burner box.

  • Page 72: Supply Fans

    Cleaning of the drain pans and inside of the Replace filter media monthly. Filters are unit must be done only by qualified located either upstream of the evaporator personnel. coil, upstream of the blow-through supply blowers, or in the final filter position. Replace filters with the size indicated on each Supply Fans filter or as shown in the tables below.
  • Page 73 particles, bio-aerosols, or gases at a concentration high enough to be considered harmful, not suitable for recirculation or transfer to any other space. Class of Air Examples Cleaning Frequency  Offices  Classrooms Class 1 Every 8-10 years  Assembly rooms Clean Air ...

  • Page 74: Figure 35 - Wheel Segment Removal Pattern

    Aluminum Energy Recovery Cleaning Polymer Wheel Segment Installation & To clean, gain access to the aluminum energy Replacement recovery wheel then use the following An uneven number of segments in the wheel methods: will cause the wheel to accelerate in rotation. ...
  • Page 75 5. Holding segment by the two outer corners, press the segment towards the center of the wheel and inwards against the spoke flanges. If hand pressure does not fully seat the segment, insert the flat tip of a screw driver between the wheel rim and outer corners of the segment and apply downward force while guiding the segment into place.
  • Page 76 on the profile. In order to adjust their position unscrew them and place properly. Aluminum Wheel Purge Sector Purge sectors are maintenance-free but their condition, rigidness and cleanliness must be checked every year. Pay attention to the distance of the sector against the recovery wheel matrix.
  • Page 77 screws and recheck clearance with “feeler” below, presenting proper way of replacing segments or increasing belt tension. gauge. 1. Unclip the belt using pliers. Grab the Polymer Wheel Drive Components protruding tongue of the segment to The wheel drive motor bearings are pre- remove and twist it to release the lubricated and no further lubrication is segment from the chain.

  • Page 78: Brazed Plate Heat Exchanger Cleaning

    8. Reinstall diameter seals or hub seal and Polymer Wheel Belt Replacement 1. Obtain access to the pulley side bearing tighten retaining screws. Rotate wheel access plate if bearing access plates are in clockwise direction to determine that provided. Remove two bearing access wheel rotates freely with slight drag on plate retaining screws and the access seals.

  • Page 79: Air-Cooled Condenser

    CAUTION microchannel coils. AAON E-Coated Coil Maintenance Record sheet. High velocity water from a pressure washer or compressed air must only WARNING be used at a very low pressure to prevent fin and/or coil damages.
  • Page 80 (< 100 psi), rinse the coils particulate: continue always work GulfClean ™ Coil Cleaner ; AAON PN: sections/panels. G074480 Continue until all coil areas on the inside of the unit have been rinsed. Note: Coils must...

  • Page 81: Microchannel Coil Cleaning

    #1 Simple Green often. Proper procedure must be followed at Simple Green is available from AAON Parts every cleaning interval. Using improper Supply (Part#...

  • Page 82: Filter Replacement

    AAON testing has determined that unless a chemical has a neutral pH (6-8) it must not be Replace filter media monthly. Filters are used. located upstream of the evaporator coil in the filter and economizer section.

  • Page 83: Replacement Parts

    Appendix Table 22 - RZ Series Filter Sizes Unit Box A Box B Box C Box A 32" Box B 32" Box C 32" MERV 8 Cartridge Cartridge Cartridge Air Cooled Evaporative Filters Filters Filters Filters Filters Filters Condenser Condenser...

  • Page 84: Appendix A - Heat Exchanger Corrosion Resistance

    Appendix A - Heat Exchanger Corrosion Resistance Corrosion Resistance of Copper and Stainless Steel in Brazed Plate Heat Exchangers - Points to Measure and Check in a Water Analysis The resistance guide provides the corrosion resistance of stainless steel type AISI 316 and pure Copper (99.9%) in water, to a number of important chemical factors.
  • Page 85 Water Concentration Time Limits - AISI Copper Nickel Containing (mg/l or ppm) Analyze Before Alloy Alloy Total Hardness 4.0-8.5 No Limit (°dH) < 100 Nitrate (NO No Limit > 100 < 0.2 Iron (Fe) No Limit > 0.2 < 0.2 Aluminum (Al) No Limit >...

  • Page 86: Appendix B - Thermistor Temperature Vs. Resistance Values

    Appendix B - Thermistor Temperature vs. Resistance Values Deg C Deg F Resistance (kOhms) Deg C Deg F Resistance (kOhms) 2889.6 15.07 2087.22 12.73 1522.20 10.79 1121.44 9.20 834.72 7.87 627.28 6.77 475.74 5.85 363.99 5.09 280.82 4.45 218.41 3.87 171.17 3.35 135.14...

  • Page 87: Rz Series Startup Form

    RZ Series Startup Form Date:______________ Job Name:_____________________________________________________________________ Job Address:____________________________________________________________________ ______________________________________________________________________________ Model Number:_________________________________________________________________ Serial Number:_____________________________________________ Tag:______________ Startup Contractor:______________________________________________________________ Contractor Address:________________________________________ Phone:____________ _________________________________________________________ Pre Startup Checklist Installing contractor must verify the following items: 1. Is there any visible shipping damage? 2. Is the unit level? 3.
  • Page 88 Supply Fan Assembly Alignment Check Rotation Nameplate Amps________ Number L1 Volts/Amps L2 Volts/Amps L3 Volts/Amps VFD Frequency________________ VAV Controls_________________ Energy Recovery Wheel Assembly Wheel(s) Spin Freely Check Rotation FLA____________ Number L1 Volts/Amps L2 Volts/Amps L3 Volts/Amps Power Return Assembly Alignment Check Rotation Nameplate Amps________ Number...
  • Page 89 Outside Air/Economizer Dampers Operation Check Damper Actuator Type: Economizer Changeover Type and Operations: Damper Wiring Check Gears Check Unit Configuration Water-Cooled Condenser Air-Cooled Condenser No Water Leaks Evaporative Condenser Condenser Safety Check Water Flow ________GPM Water Inlet Temperature ________°F Water Outlet Temperature ________°F Compressors / DX Cooling Head Suction...
  • Page 90 Ambient DB Temperature ________°F Ambient WB Temperature ________°F Coil Entering Air DB Temperature ________°F Coil Entering Air WB Temp ________°F Coil Leaving Air DB Temperature ________°F Coil Leaving Air WB Temp ________°F Refrigeration System 1 Saturated Line Pressure Sub-cooling Superheat Temperature Temperature Discharge...
  • Page 91 Condenser Fans Alignment Check Rotation Nameplate Amps________ Number L1 Volts/Amps L2 Volts/Amps L3 Volts/Amps VFD Frequency________________ Evaporative Condenser Pumps Check Rotation Number L1 Volts/Amps L2 Volts/Amps L3 Volts/Amps Water/Glycol System 1. Has the entire system been flushed and pressure checked? 2.
  • Page 92 Gas Heating Natural Gas Propane Purge Air from Lines Verify Pilot Spark Stage Manifold Pressure (w.c.) inlet Manifold Pressure (w.c.) outlet Electric Heating Stages__________ Limit Lockout Aux. Limit Lockout Stage Volts/Amps...
  • Page 93 This log must be kept with 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 provide phone help for proper operation and replacement parts.

  • Page 94: Maintenance Log (E-Coated Coil)

    Maintenance Log (E-Coated Coil)

  • Page 95: Literature Change History

    Literature Change History September 2020 Original version...

  • Page 96: G074290 · Rev. A · 200914

    Maintenance G074290 · Rev. A · 200914 It is 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 product without notice, obligation, or liability.

This manual is also suitable for:

Rz-45Rz-55Rz-65Rz-75Rz-90Rz-105 ... Show all

Table of Contents