Carrier 50PG20-28 Controls, Start-up, Operation, Service And Troubleshooting Instructions

Also see for 48PG20---28: User's information manual User's information manual Installation and service instructions

Carrier 50PG20-28 Controls, Start-up, Operation, Service And Troubleshooting Instructions Manual pdf 7 page image

Orifice Change (48PG Only) -- This unit is factoryassembled for heating operation using natural gas at aal eleva-tion lfom sea level to 2000 ft.Use accessory high altitude kit when installing this unit atan elevation of 2000 to 7000 ft. For elevations above 7000 ft,refer to High Altitude section on page 90 to identit) the correctorifice size for the elevation. Purchase these orifices from yourlocal Carrier dealei_ Follow instructions in accessory Installa-tion Instructions to install the correct orifices.Use accessory LP (liquid propane) gas conversion kit whenconverting this unit for use with LP fuel usage for elevationsup to 7000 ft. For elevations above 7000 ft, ret_r to HighAltitude section on page 90 to identit) the correct orifice sizefor the elevation. Purchase these orifices fiom your localCarrier dealer. Follow instructions in accessory InstallationInstructions to install the correct orifices.Power Supply -- All 208/230-v units are factorywired for 230-v power supply. If the 208/230-v unit is to beconnected to a 208-v power supply, the transformers (TRAN 1,TRAN2 and TRAN3) must be rewired by moving the wirefiom the 230-volt connection and moving to the 200-voltterminal on the primary side of the transibnner. Rei}r to unitlabel dia_am for additional inforlnation.Air Baffles -- The 48/50PG units with Humid-MiZer TMoption are equipped with Motonnastera) control to maintainadequate discha_e pressure for proper unit operation duringlow mnbient operation. Field-fabricated and installed wind bat'-ties may be required. See Optional Humidi-MiZer Dehmnidifi-cation System section on page 45.Accessory Installation -- Check to make sure that allaccessories including space thermostats and sensors havebeen installed and wired as required by the instructions andunit wiring diagrams.AIRFLOW(Cfm)500055006000650070007500800085009000Table 3 -- Fan Performance -- 48PGD020 -- Vertical Supply/Return UnitsRpm590633677722767813859906952AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)0.2 0.8Bhp1.471.822.212.67 A3.173.744.365.05 B5.81 CRpm66370374478682887191595910040.4Bhp1.74211253 A3013534124.77 B547 C625Rpm727764803842883924966100810510.6Bhp2012402843333884.48515587667Rpm786820A 857894933972B 10121053C1095Bhp2.262.673.133.644.214.835.526.267.071.0Rpm840A 872907942B 97910171056C 10961136Bhp2522943423.95453518588664747AIRFLOW(Cfm)500055006000650070007500800085009000A954988B 102410601098C 113711761.2Rpm891921Bhp Rpm277 940321 968370 999B425 1032485 1066551 1101623 C 1138701 1175786 D 1214AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)1.81.4Bhp3.023.483.99 B4.555.175.84 C6.587.38 D8.24Rpm987101410421073110611401176121212501.6Bhp3.273.744.274.855.486.176.927.748.61Rpm10321057B 10841114C 114511781213D12481285Bhp3.52401 B455514579650 D7268098992.0Rpm Bhp1076 3771099 4271125 4831153 5441183 6101215 6821249 7601283 8451319 9.36LEGENDBhp -- Brake Horsepower Input to FanBoldface indicates field-supplied motor/drive requiredNOTES:1 Motor drive ranges:(A) Low Range: 685-939,426 Bhp (208/230 and 460-v), 751-954,575 Bhp (575-v)(B) Mid-Low Range: 949-1206, 5.75 Bhp(C) Mid High Range: 941-1176, 863 Bhp(D) High Range: 1014-1297, 1150 BhpAtt other rpms require field-supplied motor or drive2 See page 30 for general fan performance notes.