Carrier SINGLE PACKAGE ROOFTOP 48HC Installation Instructions Manual

Also see for 48TC*D: Service and maintenance instructions Installation instructions

16To assemble the outside air hood:1. Remove hood top panel from shipping position onunit end.2. Install four angles to the upper end panel using thescrews provided.3. Apply seal strip to mating flanges on the side platesof the hood (see Fig. 14).Apply Seal Stripsto the back ofthese flangesApply Seal Stripto the front ofthis flangeApply Seal Stripto the front ofthis flangeApply Seal Stripto the back ofthis flangeSeal StripsApply Seal Stripsto the back ofthese surfaces772 213444 4565 6Item # Description Qty1 Angles 42 Side Plates 23 Hood 14 Outdoor Air Screens 45 Side Filter Supports 26 Side Drip Angles 27 Top Diverters 2C09079Fig. 14 -- Hood Part Identification and Seal StripApplication Areas4. Secure side plates to panel using the screws provided.5. Apply seal strip to mating flange of the hood (seeFig. 14).6. Secure top flange using screws provided in kit.7. Install outdoor air screens by sliding them into thechannel formed by the four angles installed in step 2.Make sure that the screens extend across the entirelength of the hood.8. Install side filter supports using the screws provided.9. Install side drip angles using the screws provided.10. Run a continuous length of seal strip across the hoodcovering the engagement holes in the lower hood.11. Install top diverter using the screws provided.12. On units with barometric relief, remove screws at bot-tom of relief damper. Do not discard damper door.C09090Fig. 15 -- Hood Assembly – CompletedStep 9 — Install Flue Hood and Combustion AirHoodThe flue hood is shipped screwed to the fan deck insidethe burner compartment. Remove the burner access paneland then remove the flue hood from its shipping location.Using the screws provided, install flue hood in thelocation shown in Fig. 16.The combustion air hood is attached to the back of theburner access panel. Remove the two screws securing thehood to the back of the burner access panel. Using the twoscrews, re--attach the hood to the front of the burneraccess panel as shown in Fig. 16.Flue HoodCombustionAir HoodC10744Fig. 16 -- Flue Hood and Combustion Air Hood DetailsStep 10 — Install Gas PipingInstallation of the gas piping must be in accordance withlocal building codes and with applicable national codes.In U.S.A., refer to NFPA 54/ANSI Z223.1 National FuelGas Code (NFGC). In Canada, installation must beaccordance with the CAN/CSA B149.1 and CAN/CSAB149.2 installation codes for gas burning appliances.This unit is factory equipped for use with Natural Gas fuelat elevations up to 2000 ft (610 m) above sea level. Unitmay be field converted for operation at elevations above2000 ft (610 m) and/or for use with liquefied petroleumfuel. See accessory kit installation instructions regardingthese accessories.NOTE: Furnace gas input rate on rating plate is forinstallation up to 2000 ft (610 m) above sea level. InU.S.A. the input rating for altitudes above 2000 ft (610 m)must be derated by 4% for each 1000 ft (305 m) above sealevel. In Canada the input rating must be derated by 10%for altitudes of 2000 ft (610 m) to 4500 ft (1372 m) abovesea level.For natural gas applications, gas pressure at unit gasconnection must not be less than 5 in. wg (1246 Pa) orgreater than 13 in. wg (3240 Pa) while the unit isoperating. For liquified petroleum applications, the gaspressure must not be less than 11 in. wg (2740 Pa) orgreater than 13 in. wg (3240 Pa) at the unit connection.Gas Supply Line —The gas supply pipe enters the unit adjacent to the burneraccess panel on the front side of the unit, through thegrommeted hole. The gas connection to the unit is madeto the 3 / 4 in. FPT gas inlet port on the unit gas valve.Table 2 lists typical 3 / 4 inch NPT (National Pipe Thread)field supplied pipe fittings required for Thru--Base gassupply, starting from the unit gas valve (see Fig. 17).48HC