AAON RM Series, Installation Instructions Manual

Page 1: ... STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE EXTINGUISH ANY OPEN FLAME DO NOT TOUCH ANY ELECTRICAL SWITCH DO NOT TRY TO LIGHT ANY APPLIANCE DO NOT USE ANY PHONE IN YOUR BUILDING IMMEDIATELY CALL YOUR GAS SUPPLIER FROM A NEIGHBOR S PHONE FOLLOW THE GAS SUPPLIER S INSTRUCTIONS IF YOU CANNOT REACH YOUR GAS SUPPLIER CALL THE FIRE DEPARTMEN...

Page 2: ...ns COMPRESSOR CHECKOUT PROCEDURE 21 IGNITION CONTROL CHECKOUT PROCEDURE 22 FACTORY START UP FORM 23 Owner should pay particular attention to the words NOTE CAUTION AND WARNING NOTES are intended to clarify or make the installation easier CAUTIONS are given to prevent equipment damage WARNINGS are given to alert owner that personal injury and or equipment damage may result if installation procedure...

Page 3: ... checked for damage that might have occurred in transit If damage is found it should be noted on the carrier s Freight Bill A request for inspection by carrier s agent should be made in writing at once CODES AND ORDINANCES System should be sized in accordance with National Warm Air Heating and Air Conditioning Association Literature or the Guide of American Society of Heating Refrigeration and Air...

Page 4: ...G If due to safety switch shut off or gas supply shut off failure ALWAYS CLOSE MANUAL GAS VALVE TO UNIT PRIOR TO ANY ELECTRICAL SERVICE PROLONGED OVERHEATING OF THE HEAT EXCHANGER WILL SHORTEN ITS LIFE WARNING Improper installation adjustment alter ation service or maintenance can cause property dam age personal injury or loss of life Installation and service must be performed by a qualified insta...

Page 5: ...ng These systems include liquid line filter driers expansion valves and fully hermetic compressors Compressors are equipped with a positive pressure forced lubrication system The air cooled condenser coil s are constructed of copper tubes and mechanically bonded aluminum fins and air is pulled through by propeller fans The evaporator coil is draw through type constructed of copper tubes and mechan...

Page 6: ...UNIT OR FROM BELOW TO ATTACH DUCTWORK LEAKING MAY OCCUR IF UNIT BASE IS PUNCTURED INSTALLATION DETAIL A ACOUSTIC CURB FIELD SUPPLIED WOOD NAILER GASKET ROOF DECK ROOFING MATERIAL COUNTER FLASHING STRUCTURAL STEEL RIGID INSULATION CANT STRIP SOLIDBOTTOM ACOUSTIC CURB DUCT FLEX CONNECTOR 12 12 12 12 12 12 12 12 12 12 12 12 12 12 WARNING INSULATION MATERIALS MAY BE COMBUSTIBLE WOOD NAILER DETAIL A DU...

Page 7: ... through which combustion products might en ter the building Unit location must assure combustion and ventilation air flows are never obstructed Never point flue discharge in direction of fresh air intake for other equipment Improper installation adjustment alteration service or maintenance can cause property damage personal injury or loss of life Installation and service must be performed by a qu...

Page 8: ...stion Lift hood to the open position seal flange and secure with sheet metal screws Air hoods may vary according to unit size and options The illustration shown is for practical guidelines for all outside air hoods Outdoor air intake adjustments should be made accord ing building ventilation or local code requirements NOTE All units are factory wired for 208 230 460 or 575 volt If unit is to be co...

Page 9: ...loor level Nominal Iron Pipe Size Inches 10 50 100 200 GAS PIPING CAPACITIES 3 4 278 115 79 55 1 520 215 150 100 1 1 4 1050 440 305 210 1 1 2 1600 670 460 320 2 3050 1270 870 610 2 1 2 4800 2000 1400 980 LENGTH OF PIPE FEET Max Capacity of Gas Pipe in Cubic Ft Per Hour At gas pressure of 0 5 PSIG or less and a pressure drop of 0 5 inches of water Specific gravity 0 60 UNIT SIZE TONS INPUT MBH GAS ...

Page 10: ...operation flames should be ob served as blue with slight or no yellow tipping There should be no sign of flames floating or lifting off or away from the main burners NOTE In case emergency shut down is required turn off the main manual gas shut off valve and disconnect main electrical power to unit These devices should be properly labeled by the installer IMPORTANT NOTICE All gas fired heat exchan...

Page 11: ... the control system and any gas control which has been under water OPERATING INSTRUCTIONS 5 Open control access panel 6 Push in gas control knob slightly and turn clockwise to OFF NOTE Knob cannot be turned to OFF unless knob is pushed in slightly Do not force 7 WAIT five 5 minutes to clear out any gas Then smell for gas including near the floor If you smell gas STOP Follow B in the safety informa...

Page 12: ...an airtight seal between the blower housing and the burner box must be restored High temperature silicone sealant must be used to ensure a good seal 4 GAS BURNERS THE BURNERS SHOULD NEVER REQUIRE CLEANING If cleaning is necessary it indicates faulty operation of the unit The cleaning should be done only by a qualified service agency after consultation with an AAON Service Representative If the gas...

Page 13: ...Adjust thermostat to a low temperature setting to open contacts The main gas flames should be extinguished NOTE The evaporator blower is controlled by the ignition system In the fan Auto mode the blower comes on 45 seconds after flame is proved and goes off 120 seconds after the thermostat opens HEATING ELECTRIC 1 Set thermostat in the heat mode 2 Set thermostat to call for heat to engage all elec...

Page 14: ...64 Customer Service Department COMMON CAUSES OF REDUCED AIR FLOW A DIRTYFILTERS Filtersmustbeinspectedand replaced on a regular basis It is strongly recommended that the media be replaced monthly Clean filters are your best protection against premature system break down Do not operate the unit without the filters in place Operation of the unit without filters will result in a clogged evaporator co...

Page 15: ...cy NOTE CHARTREFLECTSSTANDARDFACTORYSUPPLIEDFILTERSANDSIZES CONTACTFACTORYFORSPECIALOPTIONALFILTERPACKAGES FILTERS FILTERS SHOULD BE REPLACED EVERY 30 DAYS OR AS REQUIRED FILTER SIZE UNIT SIZE 16 x 20 Standard 2 Throwaway 4 6 4 2 5 6 7 8 10 13 15 16 30 16 x 20 Optional 2 or 4 Pleated 20 x 25 Optional 2 or 4 Pleated 6 6 4 6 IT IS IMPORTANT TO KEEP COILS BLOWER AND FILTERS CLEAN FILTER INSTALLATION ...

Page 16: ...heck limit controls for open 5 Check continuity of differential pressure switch with motor turning If open replace differential pressure switch 6 Defective ignition control 1 Thermostat not calling for heat 2 Relay not closing No power to motor 3 Motor stuck or winding open 4 Internal motor overload open 1 Unit blower not coming on Check fan control 2 Blower motor running backward 3 Filters dirty ...

Page 17: ...rmal protector open in motor 2 Motor run capacitor open or shorted 3 Motor failed 4 Fan or shaft stuck 1 Overload thermal protector open in motor 2 Relay not closing 3 Motor failed 4 Capacitor shorted or open PSC motors only 5 Stuck shaft or blower wheel 1 Check for low refrigeration charge 2 Compressor overload setting 3 Ambient temperature too low 4 Filters dirty or air flow restricted 5 Evapora...

Page 18: ...erature rise entering and leaving unit to determine if adequate water is flowing SYSTEM OFF SERVICING Continued COOLING CHILLED WATER EVAPORATOR BLOWER WILL NOT RUN ROOFTOP UNIT REPLACEMENT PARTS Replacement parts for AAON equipment may be obtained from AAON When ordering parts always reference the unit model number serial number and part number AAON Inc Customer Service Department 2425 South Yuko...

Page 19: ...ve power from all contactors If additional heating is required a second set of elements can be turned on by W2 OPTIONAL When available the electric heat can be sequenced to provide a constant discharge air tempera ture 4 Steam or Hot Water This option adds a steam coil down stream of the cooling coil if supplied Connections and controls are provided by others B COOLING 1 Packaged Units When the th...

Page 20: ...s and operates until the unit is shut off or the economizer goes back to minimum position The end switch located on the economizer outside air dampersection isfieldadjustabletoallowfordifferences in building design The switch engages and disengages the power exhaust motor s through a contactor The end switch is included in the 24 VAC circuit B Fullmodulatingeconomizer afullmodulatingpower exhaust ...

Page 21: ...PANEL NOT SET FOR COOLING COMPRESSOR DOESN T RUN REPLACE COMPRESSOR REPLACE COMPRESSOR MOTOR WINDING OPEN POWER TO COMPRESSOR ALL 3 LEGS COMPRESSOR DOESN T HUM IF COMPRESSOR DOME IS HOT IT MAY BE LOCKED OUT ON INTERNAL OVERLOAD WAIT FOR RESET IT COULD TAKE AS LONG AS 2 HOURS REPLACE LEADS BROKEN LEADS NO POWER TO COMPRESSOR COMPRESSOR HUMS CONTACTOR CLOSED POWER TO CONTACTOR ALL 3 LEGS LOW AIR CON...

Page 22: ...PARK IS PRESENT BUT BURNER WILL NOT LIGHT NO CHECK GAS SUPPLY FOR OBSTRUCTIONS OR CLOSED VALVES REPLACE GAS VALVE NO IS IGNITION CONTROL LOCKED OUT CHECK TRANSFORMER AND OR THERMOSTAT FOR MALFUNCTION REPLACE AS NECESSARY REPLACE OPEN LIMIT YES YES NO RESET BY TURNING THE THERMOSTAT TO OFF THEN BACK TO HEAT IS SPARK GAP 0 10 YES REGAP TO 0 10 IS ELECTRODE CERAMIC CRACKED OR BROKEN NO YES NO REPLACE...

Page 23: ...G TEST AMB TEMP F Head Pressure PSIG Crankcase Heater Amps Suction Pressure PSIG 5 6 7 8 MOTOR MAKE AMPS 1 2 3 4 3 Ø 1 Ø 8 5 6 7 L1 L2 L3 NAMEPLATE AMPS NAMEPLATE AMPS CHECK FAN ROTATION VAV CONTROLS CHECK FAN ROTATION AUTO AIR BALANCE Open Outside Air Hood if applicable Tighten All Set Screws On Pulleys Bearings Fans Additional Checks and Notes START UP TECHNICIAN START UP VERIFIED BY CONDENSER A...

Page 24: ...24 RM SERIES INSTALLATION INSTRUCTION MANUAL AAON Inc 2425 South Yukon Tulsa Oklahoma 74107 ph 918 583 2266 fax 918 583 6094 R15690 7 03 AAON ...