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48PD05,06
48PG03---16
Gas Heating/Electric Cooling Rooftop Units
with PURONR (R---410A) Refrigerant
User’s Information Manual
NOTETOINSTALLER: SAFETYCONSIDERATIONS
Thismanualshould beleftwith theequipmentowner.
Improper installation, adjustment, alteration, service, maintenance,
or use can cause fire, electrical shock, or other conditions which
TABLEOFCONTENTS
may cause personalinjury orproperty damage. Consult aqualified
SAFETY CONSIDERATIONS ......................... 1
installer, service agenc
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Alwayskeep theunit’s areaclearofcombustible materials. Do not DETERMINETYPEOFUNITCONTROL obstruct the air openings to the unit. Air is required for Theproceduresusedtolightorshutofftheunitdependon thetype combustion and ventilation proper operation. Follow the ofunitcontrol. Thissection willhelp determine thecontrol typeof instruction provided in this book for lighting and shutting down the unit. the unit. Should the gas supply fail to shut off or if overheating Electro--MechanicalControl occurs
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See Fig. 1. for location of gas valve. Refer to Fig. 3 while Step10— Setroomthermostatselectorslightlyaboveroom proceeding with the following steps: temperatureand setsystemswitch to HEAT position to startthe Step1— Turn offtheunitby using theScrolling Marqueeto unit.Theinduced--draftcombustionairfanwillstart.Mainburners puttheunitinto ServiceTestmode.TheScrolling Marqueeis lightwithin30seconds.Indoorblowerwillstartwithin60to90 locatedonthefrontoftheunitcontrolboxbehindthecontrolbox secondsofmai
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OFF ON OFF ON MAIN ON OFF STEP 3 STEP 2 STEP 1 Two-Stage Single-Stage RTU gas valve RTU gas valve On/Off Switch On/Off Switch CONTROL I.D. LABEL CONTROL I.D. LABEL SWITCH (SHIPPED IN “ON” POSITION) SWITCH (SHIPPED IN “ON” POSITION) 1/4˝ X .032˝ MALE SPADE TERMINALS (2) COMMON 1/4˝ X .032˝ MALE SPADE TERMINALS (2) COMMON STEP 6 STEP 4 STEP 5 STEP 7 STEP 9 STEP 8 STEP 10 C08541 Fig.2 -- To LightUnit(Unitswith Electro--MechanicalControl) 4 LOCK-OUT TAG 48PD, 48PG
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MAIN MODE Run Status ON Service Test Temperature Pressures Setpoints Alarm Status Inputs Outputs Configuration ESCAPE ENTER Time Clock Operating Modes Alarms OFF STEP 1 STEP 2 STEP 3 Two-Stage Single-Stage RTU gas valve RTU gas valve On/Off Switch On/Off Switch STEP 4 STEP 6 STEP 5 STEP 7 STEP 9 STEP 8 MODE Run Status Service Test Temperature Pressures Setpoints Inputs Alarm Status Outputs Configuration ESCAPE ENTER Time Clock Operating Modes Alarms STEP 10 C08542 Fig.3 -- To LightUnit(Units
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TOSHUTUNITOFF TOSHUTUNITOFF (UNITSWITHELECTRO--MECHANICAL (UNITSWITHCOMFORTLINKt CONTROL) CONTROL) ! ! WARNING WARNING FIRE HAZARD FIRE HAZARD Failure to follow this warning could result in personal injury, Failure to follow this warning could result in personal injury, death,and/orpropertydamage. death,and/orpropertydamage. Donotturnofftheelectricalpowertounitwithoutfirstturning Donotturnofftheelectricalpowertounitwithoutfirstturning off the gas supply. Should the gas supply fail to shut off or
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MAIN ON OFF STEP 2 STEP 3 STEP 1 Two-Stage Single-Stage RTU gas valve RTU gas valve On/Off Switch On/Off Switch STEP 4 STEP 5 STEP 7 STEP 6 C08543 Fig.4 -- ToShutUnitOff(UnitswithElectro--MechanicalControl) 7 LOCK-OUT TAG 48PD, 48PG
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MAIN ON MODE Run Status Service Test Temperature Pressures Setpoints Inputs Alarm Status Outputs Configuration ESCAPE ENTER Time Clock OFF Operating Modes Alarms STEP 2 STEP 1 STEP 3 Single-Stage Two-Stage RTU gas valve RTU gas valve On/Off Switch On/Off Switch STEP 4 STEP 5 STEP 6 STEP 7 C08544 Fig.5 -- ToShutUnitOff(UnitswithComfortLinktControl) 8 LOCK-OUT TAG 48PD, 48PG
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CONTROL BOX AND COMPRESSOR ACCESS DOOR INDOOR MOTOR ACCESS DOOR OUTDOOR AIR SCREEN CONDENSER COIL ACCESS DOOR GAS SECTION ACCESS DOOR FILTER ACCESS DOOR C08545 Fig.6 -- PanelandFilterLocations(48PG03--07Shown) MAINTAININGYOURUNIT AirFilter(s) Air filters should be checked at least every 3 or 4 weeks and All maintenance should be handled by skilled, experienced changed or cleaned whenever they become dirty. Table 1 indicates personnel.Yourdealercan helpyou establishastandardprocedure. the corr
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Table1–IndoorAirFilterData 10. When you have completed your inspection, follow the start--up procedures in this manual to restore your unit to UNIT FILTER QUANTITY FILTER SIZE operation. SIZE 4 16x20x(2or4)in 11. Observe unit heating operation, and watch the burnerflame 03---07 (406.4x508x[50.8or101.6])mm with the access panel removed to see if it is bright blue. If 4 20x25x(2or4)in 08---14 you observe a suspected malfunction, or that the burner (508x635x[50.8or101.6])mm flames are not bright bl
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Complete Service Instructions can be found in the unit Compressors Installation, Start--Up and ServiceInstructions. All compressors are factory shipped with a normal charge of the correct type refrigerant grade oil. No field lubrication is necessary BEFOREYOUCALLFORSERVICE, except possibly with repair or replacement of refrigerant circuit CHECKFORSEVERALEASILYSOLVED components. PROBLEMS CondenserFan Ifinsufficientheatingorcoolingissuspected: ( )Check for sufficient airflow. Check the air filter
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HEATING & COOLING TO OBTAIN INFORMATION ON PARTS: Consult your installing dealer or classified section of your local telephone directory under the “Heating Equipment” or “Air Conditioning Contractors & Systems” heading for dealer listing by brand name. Have available the Model No., Series Letter, & Serial No. of your equipment to ensure correct replacement part. Copyright 2008 CarrierCorporation, 7310 W. MorrisSt. Indianapolis, IN 46231 CatalogNo:48PDPG---01SO Printed inthe U.S.A. EditionDate:9/
