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48TJ016-028
Single-Package Rooftop Units
Electric Cooling/Gas Heating
Installation, Start-Up and
Service Instructions
CONTENTS
precautions in the literature, tags and labels attached to the unit,
and other safety precautions that may apply.
Page
Follow all safety codes. Wear safety glasses and work
SAFETY CONSIDERATIONS ...................... l
gloves. Use quenching cloth for unbrazing operations. Have
INSTALLATION ................................ 2-31
fire extinguishers available for all brazin
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INSTALLATION Step 2 -- Rig and Place Unit -- Do not diop unit; keep upright. Use spreader bras over unit to prevent sling or Inspect unit for transportation dmnage. If &_mage is found, cable &image. Rollers may be used to move unit across a roof. file claim with transportation agency. Level by using unit frame as a refelence; leveling tolerance is Step 1 -- Provide Unit Support _+1/1_ in. per linear fl in any direction. See Fig. 3 for additiomfl information. Unit operating weight is shown in Tab
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DESCRIPTION PKG. NO. REF. HEIGHT CRRFCURBOIOAO0 1"- 2" (305) Standard Curb 14" High CRRFCURBO11AO0 2'- 0" (610) Standard Curb for Units Requiring High Installation CURB CRRFCURBO12AO0 2'- 0" (610) Side Supply and Return Curb for High Installation NO-E5_ 1, ROOF CURB ACCESSORY IS SHIPPED DISASSEMBLED. 2. IN5ULATED PANEL5_ 1_ THICK NEOPRENE COATED I-I/2 LS DENSITY S'-I0 I/2" =I PLAN VIEW OF ROOF CURB --OUTLINEGPUN,T 3. DIMEN51ON5 iN ( ) ARE IN MILLIMETER5, 4. I:zZ_>DIRECTiON OF AIR FLOW 5, ROOFCU
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I0'-0" (3048) ,SPREADERBARS "DETAIL A" 3'-7 112" (t t 05) _ _RIGGING HOOK UNIT BASE RAIL SEE "DETAIL A' NOTES: 1. Dimensions in ( ) are in millimeters. 2. Refer to Fig. 4 and 5 for unit operating weights. 3. Remove boards at ends of unit and runners prior to rigging, 4. Rig by inserting hooks into unit base rails as shown. Use corner post from packaging to protect coil from damage, Use bumper boards for spreader bars on all units. 5. Weights do not include optional economizer, Add 90 Ib (41 kg)
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STD UNIT ECONOMIZER CORNER CORNER CORNER CORNER DIM A DIM B DIM C UNIT WEIGHT WEIGHT A B C D ft-in, mm if-in, mm ft-in, mm Ib kg Ib kg Ib kg Ib kg Ib kg Ib kg 48TJD, 3-5 1041 3-5 1041 1-10 559 TJF016 1650 748 90 41 423 192 386 175 403 183 438 199 48TJD, 3-3 991 3-7 1092 1-8 508 TJF020 1800 816 90 41 432 196 410 186 461 209 472 214 NOTES: 1. Refer to print for roof curb accessory dimensions. 2. Dimensions in ( ) are in millimeters. 3. _ Center of Gravity. 4. E_ Direction of airflow. 5. Ductwork t
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BTD UNIT ECONOMIZER CORNER CORNER CORNER CORNER DIM A DIM B DIM C UNIT WEIGHT WEIGHT A B C D ft-in, mm ft-in, mm ft-in, mm Ib kg Ib kg Ib kg Ib kg Ib kg Ib kg 48TJD, 3-2 965 3-5 1041 1-8 508 TJF024 1850 839 90 41 443 201 406 184 476 216 525 238 48TJ D, 3-2 965 3-8 1041 1-8 508 TJF028 2000 907 90 41 471 214 428 194 526 239 574 260 NOTES: 1. Refer to print for roof curb accessory dimensions. 2. Dimensions in ( ) are in millimeters• 3. _ Center of Gravity. 4. E_ Direction of airflow• 5. Ductwork to
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Table 1 -- Physical Data 016D/F UNIT 48TJ 020D/F 024D/F 028D/F 208/230, 460 v I 575 v NOMINAL CAPACITY (tons) 15 18 20 25 OPERATING WEIGHT (Ib) 1650 1800 1850 2000 Economizer 90 90 90 90 Roof Curb 200 200 200 200 COMPRESSOR Scroll 1...SM120, 1...SM120, 1...SM161, Quantity,.,Model (Ckt 1, Ckt 2) 2_.SR*942AE 1_.SR*782AE 1._SM110 1_.SM120 Number of Refrigerant Circuits 2 2 2 2 Oil (oz) (Ckt 1, Ckt 2) 90, 90 110, 72 110,110 112, 110 Stages of Capacity Control (%) 50/50 60/40 52/48 56/44 REFRIGERANT
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Table 1 -- Physical Data (cont) UNIT 48TJ 016D/F O20D/F 024D/F 028D/F FURNACE SECTION 190 190 190 190 Rollout Switch Cutout Temp (F)t Burner Orifice Diameter (in....drill size) Natural Gas 0.1285-.30/0.136-.29 0.1285.-30/0.136-.29 0.1285.-30/0.136-.29 0.1285_.30/0.136...29 Thermostat Heat Anticipator Setting (amps) 0.98 0.98 0.98 0.98 208/230, 575 Stage 1 0.44 0.44 0.44 0.44 Stage 2 460 v 0.80 0.80 0.80 0.80 Stage 1 0.44 0.44 0.44 0.44 Stage 2 Gas Input Stage 1 172,000/225,000 206,000/270,000 20
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Step 3 -- Field Fabricate Ductwork -- Secure all Step 5 -- Install Flue Hood and Wind Baffle -- ducts to building structure. Use flexible duct connectors be- Flue hood and wind baffle are shipped secured under main tween unit and ducts as required. Insulate and weatherproof all control box. To install, secure flue hood to access panel. See external ductwork, joints, and roof openings with counter Fig. 9. The wind baffle is then installed over the flue hood. flashing and mastic in accordance with
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INDUCED DRAFT Step 7 -- Orifice Change -- This unit is factory as- MOTOR sembledfor heating operation using natund gas at an elevation from sea level to 2000 ft. This unit uses orifice type LH32RFnnn, where "nnn" indicates the orifice size based on drill size diameter in thousands of an inch. HIGH ELEVATION (Above 2000 ft) -- Use accessory high altitude kit when inst_dling this unit at an elewttion of 2000 to 7000 ft. For elevations above 7000 ft, refer to Table 2 to identi- fy the correct orifi
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Tlansformer no. 1 is wired for 230-v unit. If 208/230-v unit Step 8 -- Install Gas Piping -- Unit is equipped for use with natured gas. Installation must conform with loc_d is to be run with 208-v power supply, the transformer must be rewired as follows: building codes or. in the absence of loc_d codes, with the National Fuel Gas Code, ANSI Z223.1. 1. Remove cap fiom red (208 v) wire. Install field-supplied manu_d gas shutoff valve with a lh-in. 2. Remove cap from orange (230 v) spliced wire. NP
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OPTIONAL NON-FUSED DISCONNECT -- On units with THERMOSTAT ASSEMBLY the optiomfl non-fused disconnect, incoming power will be wired into the disconnect switch. Refer to Fig. 16 for wiring for 100 and 200 amp disconnect switches. Units with an MOCP under 100 will use the 100 amp disconnect switch. Units with an MOCP over 100 will use the 200 amp discon- nect switch. Refer to the applicable disconnect wMng diagram. _ Z Z Lu q z cc o _, cc I To prevent breakage during shipping, the disconnect handle
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Table 5 -- Electrical Data NOMINAL VOLTAGE COMPRESSOR POWER COMBUSTION POWER OFM UNIT IFM EXHAUST FAN MOTOR SUPPLY VOLTAGE RANGE No. 1 No, 2 48TJ FLA FLA LRA FLA MCA MOCP* (3Ph, 60Hz) Min Max RLA LRA RLA LRA Q_ Hp FLA(ea) Hp 0.57 74/74 90/90 208/230 187 253 25.6 190 25.6 190 3 0.5 1.7 3.7 10.5/11.0 4.6 18.8 0.57 79/79 100/100 0.30 38 50 016 460 414 508 13.5 95 13.5 95 3 0.5 0.8 3.7 4.8 (15 Tons) 2.3 6.0 0.30 40 50 0.57 30 35 575 518 632 10.2 75 10.2 75 3 0.5 0.8 3.0 3.9 2.1 4.8 0.57 32 40 0.87 8
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Step 10 -- Make Outdoor-Air Inlet Adjust- OUTDOOR-AIR HOOD AND ments MOUNTING BRACKETS MANUAL OUTDOOR-AIR DAMPER -- All units (except those equipped with a factory-inst_dled economizer) have a manual outdoor-air &tmper to provide ventilation ail: Damper can be preset to admit up to 25% outdoor air into return-tdr compartment. To adjust, loosen secunng screws and move &tmper to desired setting, then retighten screws to secure dmnper (see Fig. 17). 25% ADJUSTABLE AIR DAMPER / F[_ER PACKAGEAN[ ol H
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Step 12 -- Install All Accessories-- Install all Install Motormaster [ Controls -- Only one Motormaster I field-installed accessories. Refer to the accessoly installation control is required per unit. The Motormaster I control must be used in conjunction with the Accessory 0° F Ix_w Ambient Kit instructions included with each accessory. (purchased separately). The Motormaster [ device controls out- MOTORMASTER® I CONTROL INSTALLATION door fan no. 1 while outdoor fans no. 2 and 3 are sequenced of
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MOTORMASTER® V CONTROL INSTALLATION FROM FUSE BLOCK (48TJ024,028 UNITS) >- ca Install Field-Fabricated Wind Baflles -- Wind baflles must be field-fabricated for all units to ensure proper cooling cycle 10 o---1 operation at low ambient temperatures. See Fig. 21 for baflle details. Use 20-gage, galvanized sheet metal, or similar corro- u 1.2 1.3 sion-resistant metal for baffles. Use field-supplied screws to at- tach baffles to unit. Screws should be l/4-in, diameter and 5/8-in. long. Drill requir
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Step 13 --Adjust Factory-Installed Options into the fan section, down along the back side of the fan, and _dong the fan deck over to the supply-air opening. PREMIERLINK TM CONTROL -- The PrelnierLink control- The SAT probe is wire-tied to the supply-air opening (on the ler is available as a special order from the facto U and is com- horizontal opening end) in its shipping position. Remove the patible with the Ctmier Comfort Network® (CCN) system. sensor for installation. Re-position the sensor i
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_] BLUE _Lu PremierLink RRN (_ BRN Control BLK (_ BLK COM GRN BRN WHT i ORN BRN • BRN BRN CO_'_ SAT w• _ VlO • VlO BRN COM [_ BRN RED RED _ BLU COM BRN BLU DDC OAT PNK CONF{OL GRN GRN_ RED RED _ YEL YEL : RED RED _ BLU BLU RED RED FT FsD WriT WHT _ RED RED T _ PNK RED C_ ] _ORN ORN _ _' NOT ] L_ RED __ RED _ _ ECONO USED ] RELAYS IIII IIIII IIIIIIII IIIIIIIIIIIIII Y1 L Y2 I RJo " Wl ,RA , II R,O, RED RED , RED w2 =_-T_ 'w.z / J_ _'"EO BLU W_T _1_O_,NR_o q I (_-- WNT CL01 TB_1 I I I ' _F,ELD [_ _
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Table 8 -- PremierLink TM Sensor Usage OUTDOOR AIR RETURN AIR OUTDOOR AIR RETURN AIR APPLICATION TEMPERATURE SENSOR TEMPERATURE SENSOR ENTHALPY SENSOR ENTHALPY SENSOR DifferentialDryBulb Temperature with Required -- PremierLink* Included-- 33ZCT55SPT -- -- (PremierLink HH79NZ039 or Equivalent requires 4-20mA Actuator) Single Enthalpy with Required -- PremierLink* 33CSENTHSW (PremierLink Included -- -- (HH57ZC003) -- requires 4-20mA NotUsed or Actuator) HH57AC077 Differential Enthalpy Required --
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fSensor Thermistor Thermistor _ S Humidi_ Sensor I Fig. 26 -- Enthalpy SwitchlReceiver Dimensions Fig. 27 -- Enthalpy Sensor Dimensions (33CSENTHSW) (33CSENTSEN) / o ....... _(OR UNIT GROUND) \ *Used with Differential Enthalpy Control only, TM Fig. 28 -- Typical Wiring Schematic -- Carrier Rooftop Unit with PremierLink Controls 20
