RQ SERIES Packaged Rooftop Units, Heat Pumps, & Outdoor Air Handling Units Installation, Operation, & Maintenance WARNING FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in serious injury, death or property damage. WARNING o Do not store gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance Improper installation, adjustment, alteration, service or maintenance can cause serious injury, death or property damage.
Table of Contents Safety .............................................................................................................................................. 9 RQ Series Feature String Nomenclature ....................................................................................... 14 General Information ...................................................................................................................... 23 Codes and Ordinances..................................................
Discharge and Suction Line Piping........................................................................................... 49 Heating Coils ............................................................................................................................ 52 Chilled Water Coil .................................................................................................................... 52 Startup ...............................................................................................
Appendix B - Thermistor Temperature vs. Resistance Values ..................................................... 75 RQ Series Startup Form ................................................................................................................ 76 Maintenance Log .......................................................................................................................... 80 Literature Change History...........................................................................................
Index of Tables and Figures Tables: Table 1 - Electric and Gas Heating Capacities ............................................................................. 26 Table 2 - Auxiliary Electric Heating Capacities ........................................................................... 27 Table 3 - Unit Clearances ............................................................................................................. 28 Table 4 - Control Wiring...........................................................
Figures: Figure 1 - Lockable Handle .......................................................................................................... 24 Figure 2 - RQ Series Orientation .................................................................................................. 28 Figure 3 - RQ Cabinet Standard and Power Exhaust Gasket Locations ....................................... 30 Figure 4 - Forklifting an RQ Series Unit from the Side ...............................................................
Safety Attention should 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.
WARNING FIRE, EXPLOSION OR CARBON MONOXIDE POISONING HAZARD Failure to replace proper controls could result in fire, explosion or carbon monoxide poisoning. Failure to follow safety warnings exactly could result in serious injury, death or property damage. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this appliance. WARNING During installation, testing, servicing and troubleshooting of the equipment it may be necessary to work with live electrical components.
WARNING WARNING UNIT HANDLING WATER PRESSURE To prevent injury or death lifting equipment capacity shall exceed unit weight by an adequate safety factor. Always test-lift unit not more than 24 inches high to verify proper center of gravity lift point to avoid unit damage, injury or death. Prior to connection of condensing water supply, verify water pressure is less than maximum pressure shown on unit nameplate.
CAUTION Do not clean DX refrigerant coils with hot water or steam. The use of hot water or steam on refrigerant coils will cause high pressure inside the coil tubing and damage to the coil. CAUTION Door compartments containing hazardous voltage or rotating parts are equipped with door latches to allow locks. Door latch are shipped with nut and bolts requiring tooled access. If you do not replace the shipping hardware with a pad lock always re-install the nut & bolt after closing the door.
4. Provide adequate combustion ventilation air to the furnace. If a vent duct extension is used, a class III approved vent is required. See the Locating Units and Gas Heating sections of the Installation section of the manual. 5. Always install and operate furnace within the intended temperature rise range and duct system external static pressure (ESP) as specified on the unit nameplate. 6. The supply and return air ducts must be derived from the same space.
RQ Series Feature String Nomenclature 15 16 17 18 19 20 21 22 23 14A 14B 7 8 9 10 11 12 13 6A 6B 6C 5A 5B 5C 2 3 4 Unit Feature Options 1A 1B 1C 1D B1 B2 B3 A3 A4 : A1 A2 CONFIG VLT SIZE GEN Model Options RQ – 005 – 3 – V – BB 0 1 – 3 3 4 : A 0 0 0 – D 0 B – P J C – 0 B A – 0 D 0 0 0 0 L – 0 0 – 0 0 B 0 0 0 0 0 B BASE MODEL SERIES AND GENERATION RQ UNIT SIZE 002 = 2 ton Capacity 003 = 3 ton Capacity 004 = 4 ton Capacity 005 = 5 ton Capacity 006 = 6 ton Capacity VOLTAGE 1 = 230V/1Φ/60Hz 2 = 2
RQ Series Feature String Nomenclature RQ–005–3–V–BB0 15 16 17 18 19 20 21 22 23 14A 14B 7 8 9 10 11 12 13 6A 6B 6C 5A 5B 5C 2 3 4 Unit Feature Options 1A 1B 1C 1D B3 B1 B2 : A3 A4 A1 A2 CONFIG VLT SIZE GEN Model Options 1–3 34:A000–D0B–PJC–0BA–0D0000L–00–00B00000B Model Option A: COOLING/HEAT PUMP A3: COIL COATING 0 = Standard 1 = Polymer E-Coated Evap. and Cond. Coils 8 = Polymer E-Coated Cond. Coil 9 = Polymer E-Coated Cooling Coil A = Stainless Steel Evap.
RQ Series Feature String Nomenclature RQ–005–3–V–BB01–334 15 16 17 18 19 20 21 22 23 14A 14B 7 8 9 10 11 12 13 6A 6B 6C 5A 5B 5C 2 3 4 1B 1C 1D Unit Feature Options 1A B3 : B1 B2 A1 A2 A3 A4 CONFIG VLT SIZE GEN Model Options : A000–D0B–PJC–0BA–0D0000L–00–00B00000B Model Option B: HEATING Feature 1: RETURN/OUTSIDE AIR B3: HEATING STAGING 0 = No Heating 1 = 1 Stage 2 = 2 Stage 3 = 3 Stage 4 = 4 Stage 9 = Modulating Gas/SCR Electric A = SCR Electric, 0-10V External Control H = Single Serpe
RQ Series Feature String Nomenclature RQ–005–3–V–BB01–334:A0 15 16 17 18 19 20 21 22 23 14A 14B 7 8 9 10 11 12 13 6A 6B 6C 5A 5B 5C 4 2 3 1B 1C 1D Unit Feature Options 1A : B1 B2 B3 A1 A2 A3 A4 CONFIG VLT SIZE GEN Model Options 0 0–D 0B–PJC–0BA–0D0000L–00–00B00000B Feature 1: RETURN/OUTSIDE AIR Feature 2: OUTSIDE AIR CONTROL 1B: RETURN/EXHAUST AIR BLOWER CONFIGURATION 0 = Standard – None A = 1 Blower + Standard Eff. Motor C = 1 Blower + Premium Eff. Motor E = 1 Blower + Premium Eff.
RQ Series Feature String Nomenclature RQ–005–3–V–BB01–334:A000–D0B–P J C–0 B A–0D0000L–00–00B00000B Feature 4: MAINTENANCE OPTIONS Feature 6: FILTERS 0 = Standard - None A = Field Wired 115V Outlet B = Factory Wired 115V Outlet C = Blower Aux. Contact D = Remote Start/Stop Terminals E = Options A + C F = Options A + D G = Options B + C H = Options B + D J = Options A + C + D K = Options B + C + D L = Options C + D 6A: PRE FILTER 0 = Standard - None A = 2” Pleated - 30% Eff.
RQ Series Feature String Nomenclature RQ–005–3–V–BB01–334:A000–D0B–PJC–0BA–0 15 16 17 18 19 20 21 22 23 14A 14B 12 13 7 8 9 10 11 6A 6B 6C 5A 5B 5C 2 3 4 Unit Feature Options 1A 1B 1C 1D : B1 B2 B3 A1 A2 A3 A4 CONFIG VLT SIZE GEN Model Options D 0 0 00L–00–00B00000B Feature 7: REFRIGERATION CONTROL Feature 9: REFRIGERATION ACCESSORIES 0 = Standard A = 5 Min. Time Delay Relay - Comp.
RQ Series Feature String Nomenclature RQ–005–3–V–BB01–334:A000–D0B–PJC–0BA–0D0000 15 16 17 18 19 20 21 22 23 14A 14B 12 13 7 8 9 10 11 6A 6B 6C 5A 5B 5C 2 3 4 Unit Feature Options 1A 1B 1C 1D : B1 B2 B3 A1 A2 A3 A4 CONFIG VLT SIZE GEN Model Options L –0 0–00B00000B Feature 12: CONTROLS Feature 13: SPECIAL CONTROLS 0 = Standard A = Low Limit Controls B = Phase and Brown Out Protection C = Energy Recovery Wheel Defrost D = Energy Recovery Wheel Rotation Detection E = Compressor Power Facto
RQ Series Feature String Nomenclature RQ–005–3–V–BB01–334:A000–D0B–PJC–0BA–0D0000L–00–0 0 B 0 0 0 0 0B Feature 15: Glycol Percentage Feature 20: CRATING 0 = Standard A = 20% Propylene Glycol B = 40% Propylene Glycol C = Field Adjustable for Glycol Percentage 0 = Standard A = Export Crating B = Export Crating - No Condenser Section Feature 16: INTERIOR CABINET OPTIONS 0 = Standard B = Service Lights Feature 17: EXTERIOR CABINET OPTIONS 0 = Standard A = Base Insulation B = Burglar Bars D = Options A +
RQ Series Feature String Nomenclature 22 23 15 16 17 18 19 20 21 14A 14B 7 8 9 10 11 12 13 6A 6B 6C 5A 5B 5C 2 3 4 Unit Feature Options 1A 1B 1C 1D : B1 B2 B3 A1 A2 A3 A4 CONFIG VLT SIZE GEN Model Options RQ–005–3–V–BB01–334:A000–D0B–PJC–0BA–0D0000L–00–00B00000 B Feature 22: CONTROL VENDORS Feature 23: TYPE 0 = None A = WattMaster Orion Controls System B = JENEsys Control System with Web UI C = WattMaster Orion Controls System with Specials E = Remote Mounted AAON Mini Controller F = JEN
General Information RQ Series packaged rooftop units, heat pumps and outdoor air handling units have been designed for outdoor installation only. Units are assembled, wired, charged and run tested at the factory. Startup and service must be performed by a Factory Trained Service Technician. WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Startup and service must be performed by a Factory Trained Service Technician.
Installation of RQ Series units must conform to the ICC standards of the International Mechanical Code, the International Building Code, and local building, plumbing and waste water codes. 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 & Propane Installation Code CSA B149.1 or B149.2, and Mechanical Refrigeration Code CSA B52.
The warranty card must be completed in full and returned to AAON not more than 3 months after unit is delivered. Storage If installation will not occur immediately following delivery, store equipment in a dry protected area away from construction traffic and in the proper orientation as marked on the packaging with all internal packaging in place. Secure all loose-shipped items.
to the compressor. As the liquid concentration builds up, oil is washed out of the compressor, leaving it starved for lubrication. The compressor life will be seriously shorted by reduced lubrication and the pumping of excessive amounts of liquid oil and refrigerant.
Feature 3 *K = Heat K *L = Heat L *M = Heat M *N = Heat N Table 2 - Auxiliary Electric Heating Capacities kW (208V) kW (230V, 460V, 575V) 7.5 10.0 15.0 20.0 22.5 30.0 30.0 40.0 Wiring Diagrams Unit specific wiring diagrams are laminated and affixed inside the compressor and control compartment door. Condensate Drain Pan Unit requires drain trap to be connected to the condensate drain pan of the unit. Units include one drain pan connection.
Installation AAON equipment has been designed for quick and easy installation. Unit Location The curb should be mounted first and must be located so that duct connections will be clear of structural members of the building. Verify rooftop or foundation can support the total unit weight, including accessory weights.
only. Do not make openings larger than necessary. Set the curb to coincide with the openings. Make sure the curb is level. Unit must be level in both horizontal axes to support the unit and reduce noise and vibration. Be careful to install the provided gasket according to Figure 3 prior to setting the unit on the curb. CAUTION All roofing work should be performed by competent roofing contractors to avoid any possible leakage.
Figure 3 - RQ Cabinet Standard and Power Exhaust Gasket Locations 30
CAUTION Incorrect lifting can cause damage to the unit. Forklifting the Unit Units can be lifted using a forklift. Forks must be 48” in length. Standard units can be lifted from all sides except the outside air side. Units with energy recovery wheels can only be fork lifted from the left or right side. Forks must be perpendicular to unit. When lifting from either side, the forks must extend through to the opposite side of the unit.
Lifting the Unit The RQ Series units must be lifted using the lifting points in the side base rails. A spreader bar must be used to prevent the lifting straps from damaging the unit. The connection points on the spreader bar must be 48”-60” apart. The minimum cable length used to lift a standard length (82” base length) is 72”. The minimum cable length to lift energy recovery units (116” base length) is 96”. The shackles used to connect the cables to the lifting points in the base should be ½” nominal size.
Figure 7 - Lifting Details of a 2-6 ton Energy Recovery Wheel Unit 33
Vertical Duct Connection Note: If outside air will be in contact with the air tunnel base the unit should include the base insulation option or the base must be field insulated. CAUTION Do not drill or punch holes in the base of the unit, from inside the unit or from below the unit to attach ductwork. Leaking may occur if unit base is punctured.
Seismic Curb Installation Using a standard curb with a seismic unit will void the certification of the unit. All mounting details listed must be followed to achieve seismic certification. The AAON unit must be certified 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 must approve building anchorage to unit or curb in compliance with OSP-0180-10.
Figure 10 - Seismic Solid Bottom Curb without Filters Cross Section Figure 11 - Seismic Solid Bottom Curb without Filters Detail A Figure 12 - Seismic Solid Bottom Curb without Filters Detail B 36
Figure 13 - Seismic Rigid Mount Curb Cross Section Horizontal Duct Connection Note: If outside air will be in contact with the air tunnel base the unit should include the base insulation option or the base must be field insulated. 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 the hood. Remove shipping covers and attach duct to flanges provided on the unit.
Figure 15 - RQ Series unit Closed Rain Hood Figure 16 - RQ Series unit Open Rain Hood Metal Mesh Filters Metal mesh outside air filters require installation of the filter rack on the intake of the rain hood. Clips which hold the metal mesh filters in the filter rack should face outward.
Electrical Verify the unit nameplate agrees with power supply. Connect power and control wiring to the unit as shown in Figure 12 and in the unit specific wiring diagram, which shows factory and field wiring and is attached to the inside of the door of the control compartment. Route power and control wiring, separately, through the utility entry in the base of the unit. Do not run power and control signal wires in the same conduit.
the current National Electric Code, ANSI/NFPA 70 or the current Canadian Electrical Code CSA C22.1. Note: All units are factory wired for 208V, 230V, 460V, or 575V. The transformer configuration must be checked by a qualified technician prior to service, especially if unit is to be connected to a 208V or 230V supply. For 208V service interchange the yellow and red conductor on the low voltage control transformer.
Wire control signals to the unit’s low voltage terminal block located in the controls compartment. If any factory installed wiring must be replaced, use a minimum 105°C type AWM insulated conductors. Thermostat Control Wiring If a thermostat is used for unit control, thermostat should be located on an inside wall 4-5 feet above the floor where it will not be subjected to drafts, sun exposure, or heat from electrical fixtures of appliances.
After verifying gas inlet pressure and manifold pressure the service technician must time the gas flow rate through the gas meter with a stopwatch to verify the gas input rate. Unit nameplate input rate value has been calculated at the altitude where the unit was shipped. Above 2,000 ft the input rate is adjusted 4% for every 1,000 ft. Figure 20 - RQ Series Gas Heat Exchanger Maximum Piping Capacities Table 6 - Natural Gas (ft3/hr) - Specific Gravity = 0.6, Supply Pressure ≤ 0.5 psi, Pressure Drop = 0.
From the natural gas maximum capacities table, at 100 ft and 1080 ft3/hr the required minimum pipe size is 2”. A 100 ft pipe run is needed for a 270 MBH propane gas heater. 270 MBH = 270 kBtu/hr From the propane gas maximum capacities table, at 100 ft and 270 kBtu/hr the required minimum pipe size is 1”. Inlet and Manifold Pressures For natural gas units, the minimum inlet gas pressure to the unit is 6” w.c. and maximum inlet gas pressure to the unit is 10.5” w.c.
Additional Gas Piping Considerations Local codes will usually require a field provided and installed manual main shutoff valve and union external to the unit. Main shutoff valve should be labeled. A drip leg should be installed near the unit connection to trap sediment and condensate. Pipe joint compounds used on all gas piping connections should be resistant to liquid petroleum gases.
Leak Testing All components of gas supply system, including manual shut off valves and the piping in the interior of the unit, should be leak tested with a soap solution before operating the appliance and at least on an annual basis thereafter. DANGER LEAK CHECK GAS PIPE The gas pipe in the unit should be checked for leaks before startup. Leak checking is the responsibility of the installing contractor. All connections should be checked for leaks annually after installation.
Common forms of chlorides include: CAUTION 1. Sea water mist entering an open cooling tower system. 2. Contaminated make-up water containing salt water. 3. Disinfecting the water loop with solutions containing sodium hypochlorite. Chlorides will result in a premature failure of the condenser. Failure of the condenser as a result of chemical corrosion is excluded from coverage under AAON warranties and the heat exchanger manufacturer warranties.
WARNING WATER FREEZING Failure of the condenser due to freezing will allow water to enter the refrigerant circuit and will cause extensive damage to the refrigerant circuit components. Any damage to the equipment as a result of water freezing in the condenser is excluded from coverage under AAON warranties and the heat exchanger manufacturer warranties.
Condenser water pump must be field sized and installed between the cooling tower/geothermal loop and self-contained unit. System should be sized in accordance with the ASHRAE Handbook. Use engineering guidelines to maintain equal distances for supply and return piping and limit bend radiuses to maintain balance in the system. Balancing valves, permanent thermometers and gauges may be required. CAUTION WATER PIPING Follow national and local codes when installing water piping.
Piping systems should not exceed 10 ft/sec fluid velocity to ensure tube wall integrity and reduce noise. Condensate Drain Piping 2-6 ton units are equipped with one condensate drain pan connection, on the right side of the unit, and are furnished with a p-trap for field installation. All drain connections must be used and individually trapped to ensure a minimum amount of condensate accumulation in the drain pans. ABS type cement should be used to join the drain pipe connections.
Figure 22 - Post Corner Hole Location Figure 23 - Post Back Hole Location 50
Figure 24 - Post Corner Hole Piping Figure 25 - Post Back Hole Piping 51
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. Hot water and steam coil connections are spun copper tube. Water coils should not be subjected to entering air temperatures below 38°F to prevent coil freeze-up. If air temperature across the coil is going to be below this value, use a glycol solution to match the coldest air expected.
Startup (See back of the manual for startup form.) WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Startup and service must be performed by a Factory Trained Service Technician. WARNING Electric shock hazard. Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts. During startup, it is necessary to perform routine checks on the performance of the unit.
The type of unit and options determine the ranges for liquid sub-cooling and evaporator superheat. Refer to Table 13 below when determining the proper sub-cooling. Checking Liquid Sub-Cooling Measure the temperature of the liquid line as it leaves the condenser coil. 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 coil pressure drop.
The system is undercharged if the superheat is too high and the sub-cooling is too low Correct an undercharged system by adding refrigerant to the system to reduce superheat and raise sub-cooling. If the sub-cooling is correct and the superheat is too high, the TXV may need adjustment to correct the superheat.
°F 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 56 PSIG 78.3 80.0 81.8 83.6 85.4 87.2 89.1 91.0 92.9 94.9 96.8 98.8 100.9 102.9 105.0 107.1 109.2 111.4 113.6 115.8 118.1 120.3 122.7 125.0 127.4 129.8 132.2 Table 15 - R-410A Refrigerant Temperature-Pressure Chart PSIG PSIG PSIG °F °F °F 134.7 213.7 321.0 47 74 101 137.2 217.1 325.6 48 75 102 139.7 220.6 330.2 49 76 103 142.2 224.1 334.9 50 77 104 144.8 227.7 339.6 51 78 105 147.4 231.3 344.4 52 79 106 150.1 234.9 349.
Gas Heater Instructions Figure 26 - Gas Heater Instructions 57
Supply Fan EC Motor Startup Figure 27 - PIN Connectors on EC Supply Fan Motor Electronics Speed adjustment is made by varying the DC voltage on pin 8 (+) & 16 (-). If WattMaster, Mini Controller, or JENEsys control systems are installed on the system then they will provide the 0-10VDC signal for speed control. The controller will be wired directly to pin 8 & 16.
If there is no rotation and/or no speed change, try the following: 1. Check the line-to-line voltage on the fuse block connected to the supply fan motor and ensure it is between 187VAC to 264VAC 2. Turn the potentiometer to 50% 3. Energize the BC relay by making a blower call. 4. Check DC voltage on S1 (-) and S2 (+), 0-10VDC signal on S1 & S2 sets the speed of the motor – thus 0VDC is no speed and 10VDC is full speed. 5.
Operation Unit operations should be controlled with thermostat, or unit controller, never at the main power supply, except for servicing, emergency, or complete shutdown of the unit. Thermostat Operation Heating Thermostat system switch - "Heat" Thermostat fan switch - "Auto" or "On" Thermostat temperature set to desired point. Cooling Thermostat system switch - "Cool" Thermostat fan switch - "Auto" or "On" Thermostat temperature set to desired point.
or by an auxiliary limit mounted in the supply fan compartment. Electric Heating Operation When a call for heating (G and W1, W2, etc.) is made the supply blower motors and electric resistance heaters will energize. Heating is accomplished by passing electrical current through a specified amount of resistance heaters which will produce the required heat.
Maintenance (See back of the manual for maintenance log) At least once each year, a trained, qualified service technician should check out the unit. Fans, evaporator coils, and filters should be inspected at least monthly. Gas Heating WARNING Once a year, before the unit is in operation for the heating season, a qualified service technician should inspect all flue product carrying areas of the furnace and main burners for continued safe operation.
consultation with representative. an AAON service If induced draft blower/motor assembly has to be replaced, care must be taken to provide an airtight seal between the blower housing and the burner box. Reinstallation Ensure that the neoprene gasket is installed around the perimeter of the heat exchanger. Insert heat exchanger into opening so that the back of the main plate is against the unit bulkhead. Gas Heat Exchanger Removal WARNING Electric shock hazard.
Condenser Fan WARNING Electric shock hazard. Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts. WARNING Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury, or loss of life. Startup and service must be performed by a Factory Trained Service Technician. Removal Take off the fan grill by removing the screws that attach it to the top of the unit.
Evacuate the refrigerant system. Weigh in the nameplate refrigerant charge. See Adjusting Refrigerant Charge section to check for proper sub-cooling and superheat of the refrigerant systems. E-Coated Coil Cleaning Documented routine cleaning of e-coated coils is required to maintain coating warranty coverage. Figure 30 - Evaporator Coil Access WARNING Remove screws attaching filter rack to the evaporation coil at the front and back of the coil.
temperature is less than 130°F and pressure is less 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 chlorides and dirt. CAUTION High velocity water from a pressure washer or compressed air should only be used at a very low pressure to prevent fin and/or coil damages. The force of the water or air jet may bend the fin edges and increase airside pressure drop.
Rinse - It is highly recommended that a hose be used, but a pressure washer will damage the fins. The water to be used for the rinse is recommended to be of potable quality, though a lesser quality of water may be used if a small amount of CHLOR*RID DTS is added. Check with CHLOR*RID International, Inc. for recommendations on lesser quality rinse water.
Slide blower assembly (wire frame motor mount, motor, blower wheel, inlet, and sheet-metal slide) out of unit through blower access opening (see Figure 33). Figure 31 - 2-6 ton Supply Fan Remove wire connections from motor. For EC motors unplug the wire harness at the control module that connects to the unit control panel. Through the blower access opening, remove the two 5/16” bolts that connect the blower assembly to the inlet wall (see Figure 32).
measured voltage on the single or three phase lines. Adjust the knob labeled %± to either SINGLE PHASE on the left side of the dial or 3 PHASE on the right side of the dial. After selecting single or three phase set the knob to the percentage of Over or Under voltage desired. A typical over and under voltage percentage is 10%. Adjust the bottom knob labeled RESTART DELAY. For automatic restart after recovery of voltage select from 2 seconds up to 5 minutes.
Variable Capacity Compressor 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 of the controller. For more information on the compressor controller, see Emerson Climate Bulletin AE8-1328.
Figure 36 - Compressor Controller Flash Code Details Filter Replacement Monthly air filter inspection is required to maintain optimum unit efficiency. WARNING Electric shock hazard. Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts. Feature 6A 0 A B It is strongly recommended that filter media be replaced monthly. Filters are located upstream of the evaporator coil in the filter and economizer section.
Table 19 - RQ Series 2-6 ton Unit Filters Quantity / Size Feature 6B 0 2 / 20” x 20” x 2” A B 2 / 20” x 20” x 4” C 2 / 20” x 20” x 2” F G H 2 / 20” x 20” x 4” Type Fiberglass Throwaway, 25% Eff, MERV 4 Pleated, 30% Eff, MERV 8 Pleated, 30% Eff, MERV 8 Permanent Filter Frame Replaceable Media Pleated, 65% Eff, MERV 11 Pleated, 85% Eff, MERV 13 Pleated, 95% Eff, MERV 14 Table 20 - RQ Series 2-6 ton Energy Recovery Wheel Filters Quantity / Size Type 1 / 16” x 16” x 2” With Energy Recovery Wheel Exhau
Appendix A - Heat Exchanger Corrosion Resistance 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. The actual corrosion is a very complex process influenced by many different factors in combination.
Water Containing Total Hardness (°dH) Nitrate (NO3) Iron (Fe) Aluminum (Al) Manganese (Mn) Chloride Content = 10 ppm = 25 ppm = 50 ppm = 80 ppm = 150 ppm = 300 ppm > 300 ppm 74 Concentration (mg/l or ppm) Time Limits Analyze Before AISI 316 SMO 254 Copper Alloy Nickel Alloy 4.0-8.5 No Limit + + + + + + + + + + + + + + + + + + + + + 0 + 0 + 0 + 0 + + + + + + + + < 100 > 100 < 0.2 > 0.2 < 0.2 > 0.2 < 0.1 > 0.
Appendix B - Thermistor Temperature vs. Resistance Values Deg C -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 Deg F -40 -31 -22 -13 -4 5 14 23 32 41 50 59 68 77 86 95 104 113 122 131 140 149 Resistance (kOhms) 2889.6 2087.22 1522.20 1121.44 834.72 627.28 475.74 363.99 280.82 218.41 171.17 135.14 107.44 86.00 69.28 56.16 45.81 37.58 30.99 25.68 21.40 17.
RQ Series Startup Form Job Name:_______________________________________________ Date:______________ Address:______________________________________________________________________ ______________________________________________________________________________ Model Number:_________________________________________________________________ Serial Number:_____________________________________________ Tag:_______________ Startup Contractor:______________________________________________________________ Address:_
Supply Fan Assembly Alignment Number Check Rotation hp Nameplate Amps________ L1 L2 L3 1 Band Size_____________________ VAV Controls_________________ VFD Frequency________________ Energy Recovery Wheel Assembly Wheel Spins Freely Number Check Rotation hp FLA ________ L1 L2 L3 1 Power Exhaust Fan Assembly Alignment Number Check Rotation hp Nameplate Amps________ L1 L2 L3 1 Band Size_____________________ VFD Frequency________________ Outside Air/Economizer Dampers Operation Check Damper W
Compressors/DX Cooling Check Rotation Number L1 L2 L3 Head Pressure PSIG Suction Pressure PSIG Sub-cooling Superheat N/A N/A N/A 1 - Full Capacity 1 - Reduced Capacity Refrigeration System 1 Full Capacity - Cooling Mode Saturated Line Pressure Temperature Temperature Discharge Suction Liquid Refrigeration System 1 Reduced Capacity - Cooling Mode Saturated Line Pressure Temperature Temperature Discharge Suction Liquid N/A Sub-cooling Superheat N/A N/A N/A N/A Refrigeration System 1 Full Capac
Water/Glycol System 1. Has the entire system been flushed and pressure checked? Yes No 2. Has the entire system been filled 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 load? Yes No 6. Has the water piping been insulated? Yes No 7.
Maintenance Log 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. The responsibility for proper startup, maintenance and servicing of the equipment falls to the owner and qualified licensed technician. Entry Date 80 Action Taken Name/Tel.
Literature Change History February 2011 Added information regarding the charging of a heat pump and added additional information regarding freezing water in the heat exchanger. June 2011 Updated filter information. April 2012 Added chilled water, hot water, and steam coil connection sizes. August 2012 Added seismic curb installation instructions. November 2012 Update of the IOM adding information about compressor cycling.
AAON 2425 South Yukon Ave. Tulsa, OK 74107-2728 Phone: 918-583-2266 Fax: 918-583-6094 www.aaon.com RQ Series Installation, Operation & Maintenance R94490 · Rev. D · 130530 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. Copyright © AAON, all rights reserved throughout the world.
