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Carrier 48SS manual

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Table of contents for the manual

  • Page 1

    Single-Package Rooftop Products with Energy-Saving Features • direct spark ignition • low sound levels • 81% AFUE on most units • 10 SEER Features/Benefits One-piece heating and cooling units with low installation costs, depend- able performance, and easy maintenance Easy installation Factory-assembled package is a compact, fully self-cont[...]

  • Page 2

    Energy-saving, dir ect-spark igni- tion saves gas by operating only when the room ther mostat calls for heating. Standard units are fur nished with natural gas controls. A low- cost, field-installed kit for propane conversion is available for all units. Monoport inshot bur ners produce precise air-to-gas mixture which provides for clean and effic[...]

  • Page 3

    T able of contents Page Features/Benefits .................................................. 1 , 2 Model Number Nomenclature ........................................ 3 ARI Capacities .................................................... 4 , 5 Physical Data ...................................................... 6 Options and Accessories ............[...]

  • Page 4

    ARI* capacities COOLING CAP ACITIES AND EFFICIENCIES UNIT 48SS NOMINAL TONS ST ANDARD CFM NET COOLING† CAP ACITIES SEER† SOUND RA TINGS** (Bels) 018040 1 1 ⁄ 2 600 17,000 10.0 7.4 024040 024060 2 800 24,000 10.0 7.6 030040 030060 030080 2 1 ⁄ 2 1000 29,200 10.0 8.0 036060 036080 036100 036120 3 1200 36,000 10.0 8.0 042060 042080 042100 0421[...]

  • Page 5

    HEA TING CAP ACITIES AND EFFICIENCIES UNIT 48SS HEA TING INPUT (Btuh) OUTPUT CAP ACITY (Btuh) TEMPERA TURE RISE RANGE (°F) AFUE (%) CSE (%) 018040 024040 030040 40,000 32,800 20-50 20-50 20-50 81 81 81 76.5 76.5 76.5 024060 030060 036060 042060 60,000 48,600 25-55 25-55 25-55 25-55 81 81 81 81 77.5 77.5 77.5 77.5 030080 036080 042080 048080 060080[...]

  • Page 6

    Physical data UNIT SIZE 48SS 018040 024040 024060 030040 030060 030080 036060 036080 036100 036120 NOMINAL CAP ACITY (ton) 1 1 ⁄ 2 22 2 1 ⁄ 2 2 1 ⁄ 2 2 1 ⁄ 2 3333 OPERA TING WEIGHT (lb) Without Base Rail 272 303 315 320 324 324 336 336 348 348 With Optional Base Rail 296 327 339 344 356 356 360 360 372 372 COMPRESSORS Rotary Reciprocating Q[...]

  • Page 7

    Options and accessories Factory-installed options Unit with base rail provides holes for rigging and forklifts as well as an elevated mounting frame that gives additional structural support for horizontal installations. Ideal for light commercial applications. Downflow option unit is shipped from factory configured for vertical ductwork connectio[...]

  • Page 8

    Base unit dimensions REQ’D CLEARANCES FOR SERVICING. in. (mm) Duct panel ........................ 0 Unit top ....................... 3 6 (914) Side opposite ducts .................. 3 6 (914) Compressor access .................. 3 6 (914) (Except for NEC requirements) REQ’D CLEARANCES TO COMBUSTIBLE MA T’L. in. (mm) Maximum extension of overh[...]

  • Page 9

    48SS018-042 WITH OPTIONAL BASE RAIL REQ’D CLEARANCES FOR SERVICING. in. (mm) Duct panel ........................ 0 Unit top ...................... 3 6 (914) Side opposite ducts ................. 3 6 (914) Compressor access ................. 3 6 (914) (Except for NEC requirements) REQ’D CLEARANCES TO COMBUSTIBLE MA T’L. in. (mm) Maximum extens[...]

  • Page 10

    Base unit dimensions (cont) 48SS048,060 WITHOUT OPTIONAL BASE RAIL REQ’D CLEARANCES FOR SERVICING. in. (mm) Duct panel ....................... 0 Unit top ...................... 3 6 (914) Side opposite ducts ................ 3 6 (914) Compressor access ................ 3 6 (914) (Except for NEC requirements) REQ’D CLEARANCES T O COMBUSTIBLE MA T[...]

  • Page 11

    48SS048,060 WITH OPTIONAL BASE RAIL REQ’D CLEARANCES FOR SERVICING. in. (mm) Duct panel ........................ 0 Unit top ...................... 3 6 (914) Side opposite ducts ................. 3 6 (914) Compressor access ................. 3 6 (914) (Except for NEC requirements) REQ’D CLEARANCES TO COMBUSTIBLE MA T’L. in. (mm) Maximum extens[...]

  • Page 12

    Accessory dimensions ROOF CURB DIMENSIONS P ART NUMBER ‘ ‘A ’’ 48SS CPRFCURB001A00 8 9 [203] CPRFCURB002A00 1 1 9 [279] CPRFCURB003A00 14 9 [356] NOTES: 1. Roof curb must be set up for unit being installed. 2. Seal strip must be applied as required for unit being installed. 3. Dimensions in [ ] are in millimeters. 4. Roof curb is made of 16[...]

  • Page 13

    Selection procedure (with example) I Deter mine cooling and heating requir ements at design conditions: Given: Required Cooling Capacity (TC) ...... 34,000 Btuh Sensible Heat Capacity (SHC) ....... 24,000 Btuh Required Heating Capacity .......... 60,000 Btuh Condenser Entering-Air T emperature ........ 9 5 F Indoor-Air T emperature ....... 8 0 F ed[...]

  • Page 14

    Performance data COOLING CAP ACITIES 48SS018 TEMP (F) AIR ENT COND EV AP AIR — CFM/BF 525/0.10 600/0.12 675/0.13 Evap Air — Ewb (F) 62 67 72 62 67 72 62 67 72 85 TC 15.8 17.4 19.0 16.0 17.6 19.2 16.1 17.8 19.3 SHC 13.6 1 1.2 8.7 14.4 1 1.8 9.0 15.1 12.4 9.2 kW 1.76 1.80 1.85 1.81 1.86 1.90 1.86 1.91 1.95 95 TC 15.3 16.9 18.5 15.5 17.0 18.7 15.6[...]

  • Page 15

    COOLING CAP ACITIES (cont) 48SS048 TEMP (F) AIR ENT COND EV AP AIR — CFM/BF 1400/0.08 1600/0.10 1800/0.11 Evap Air — Ewb (F) 62 67 72 62 67 72 62 67 72 85 TC 43.8 48.3 52.9 44.5 49.1 53.7 45.1 49.6 53.9 SHC 39.4 32.7 25.6 41.9 34.6 26.4 44.1 36.4 27.1 kW 4.76 4.85 4.95 4.87 4.97 5.07 4.99 5.08 5.17 95 TC 41.9 46.4 50.9 42.6 47.0 51.7 43.3 47.5 [...]

  • Page 16

    Performance data (cont) DR Y COIL AIR DELIVERY* — HORIZONT AL DISCHARGE (Deduct 10% for 208 v) UNIT SIZE 48SS MOTOR SPEED 230 AND 460 VOL T HORIZONT AL DISCHARGE External Static Pressure (in. wg) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 018 Low W atts 230 225 220 210 195 170 ————— C f m 7 6 0 7 4 5 7 2 5 6 9 5 6 4 0 5 4 0 ———?[...]

  • Page 17

    DR Y COIL AIR DELIVERY* — VER TICAL DISCHARGE (Deduct 10% for 208 v) UNIT SIZE 48SS MOTOR SPEED 230 AND 460 VOL T VERTICAL DISCHARGE External Static Pressure (in. wg) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 018 Low W atts — 295 251 223 201 176 149 124 — — — Cfm — 821 817 753 665 536 343 164 — — — High W atts 401 376 346 322 29[...]

  • Page 18

    Performance data (cont) WET COIL PRESSURE DROP UNIT SIZE AIRFLOW (cfm) PRESSURE DROP (in. wg) 018 600 0.069 700 0.082 800 0.102 900 0.1 16 024 600 0.039 700 0.058 800 0.075 900 0.088 030 900 0.088 1000 0.095 1200 0.123 036 1000 0.068 1200 0.088 1400 0.108 1600 0.123 042 1000 0.048 1200 0.069 1400 0.088 1600 0.102 048 1400 0.068 1600 0.075 1800 0.08[...]

  • Page 19

    T ypical piping and wiring Power Wiring Control Wiring Outdoor Airflow Indoor Airflow NEC — National Electrical Code HORIZONT AL DISCHARGE DOWNFLOW DISCHARGE CEILING SUPPL Y -AIR FLEXIBLE DUCT ROOF-MOUNTING CURB ROOF RETURN-AIR FLEXIBLE DUCT 19[...]

  • Page 20

    Application data Condensate trap — A 2-in. condensate trap must be field supplied. Ductwork — Secure downflow discharge ductwork to roof curb. For horizontal discharge applications, attach duct- work to unit with flanges. T o convert a unit to downflow dischar ge or horizon- tal discharge — Units are equipped with factory-installed duct co[...]

  • Page 21

    T ypical control wiring schematic, 48SS018-060; 208/230-1-60 LEGEND AW G — American Wire Gage BR — Blower Relay C— Contactor CAP — Capacitor CH — Crankcase Heater COMP — Compressor Motor CR — Combustion Relay EQUIP — Equipment FL — Fuse Link FS — Flame Sensor FU — Fuse GND — Ground GVR — Gas V alve Relay HS — Hall Effect[...]

  • Page 22

    T ypical control wiring schematic, 48SS030-060; 208/230-3-60 LEGEND AW G — American Wire Gage BR — Blower Relay C— Contactor CAP — Capacitor CH — Crankcase Heater COMP — Compressor Motor CR — Combustion Relay EQUIP — Equipment FL — Fuse Link FS — Flame Sensor FU — Fuse GND — Ground GVR — Gas V alve Relay HS — Hall Effect[...]

  • Page 23

    T ypical control wiring schematic, 48SS036-060; 460-3-60 LEGEND AW G — American Wire Gage BR — Blower Relay C— Contactor CAP — Capacitor CH — Crankcase Heater COMP — Compressor Motor CR — Combustion Relay EQUIP — Equipment FS — Flame Sensor FU — Fuse GND — Ground GVR — Gas V alve Relay HS — Hall Effect Sensor HV TRAN — H[...]

  • Page 24

    Electrical data UNIT 48SS V -PH-HZ VOL T AGE RANGE COMPRESSOR COND FA N MOTOR INDOOR FA N POWER SUPPL Y A W G6 0C MIN WIRE SIZE† MAX WIRE LENGTH (ft) Min Max RLA LRA FLA FLA MCA MOCP* 018 208/230-1-60 187 253 7.6 45 0.7 1.8 12.0 15 14 75 024 208/230-1-60 187 253 12.4 61 0.7 2.0 18.2 30 12 80 030 208/230-1-60 187 253 14.4 82 1.4 2.0 21.8 30 10 100[...]

  • Page 25

    Controls Sequence of operation Heating — On a call for heating, ter minal ‘‘W’’ of the ther- mostat is energized, starting the induced-draft motor . When the hall-effect sensor on the induced-draft motor senses that it has reached the required speed, the bur ner sequence be- gins. This function is per for med by the integrated control boa[...]

  • Page 26

    Guide specifications Packaged Heating/Cooling Units Constant V olume Application HV AC Guide Specifications Size Range: 1 1 ⁄ 2 to 5 T ons, Nominal Cooling 40,000 to 140,000 Btuh, Nominal Input Heating Carrier Model Number: 48SS Part 1 — General 1.01 SYSTEM DESCRIPTION Outdoor rooftop mounted, gas heating/electric cool- ing unit utilizing a r[...]

  • Page 27

    I. Operating Characteristics: 1. Unit shall be capable of starting and running at 125 F ambient outdoor temperature per maxi- mum load criteria of ARI Standard 210/240. 2. Compressor with standard controls shall be ca- pable of operation in cooling down to 40 F am- bient outdoor temperature. 3. Unit provided with fan time delay to prevent cold air [...]

  • Page 28

    Carrier Corporation • Syracuse, New Y ork 13221 9-98 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 Ta b 1 a 6 a Page 28 Catalog No. 524-890 Printed in U.S.A. PC 1 1 1 Form 48SS-4PD Replaces: 48SS-3PD[...]