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Carrier WeatherMaker 48A020, Installation Instructions Manual

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Carrier WeatherMaker 48A020 Installation Instructions Manual Download Page 40

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53480274-01

Printed in U.S.A.

Form 48A-21SI

Pg 40 

11-21

Replaces: 48A-20SI

© 2021 Carrier

Summary of Contents for WeatherMaker 48A020

Page 1: ...ls and filters and replacing filters All other operations should be performed by trained service personnel When working on air conditioning equipment observe precautions in the literature tags and labels attached to the unit and other safety precautions that may apply Follow all safety codes Wear safety glasses and work gloves Use quenching cloth for unbrazing operations Have fire extinguisher ava...

Page 2: ...products into the building Check that furnace vent and air intake terminal s are not obstructed in any way during all seasons AVERTISSEMENT RISQUE D INTOXICATION AU MONOXYDE DE CARBONE Si ces directives ne sont pas suivies cela peut entraîner des blessures graves ou une intoxication au monoxyde de carbone pouvant causer la mort si des produits de combustion s infiltrent dans le bâtiment Vérifier q...

Page 3: ...acing on top of the roof deck before building insulation and roofing installation occur Place the material inside the curb and for 4 to 8 ft beyond the unit perimeter dependent upon unit size larger units require a wider apron outside the curb Openings in the pad should only be large enough for the supply and return ducts An alternate approach is to use two layers of gypsum board with staggered se...

Page 4: ...d unit Attach existing ductwork to roof curb instead of unit Four lifting lugs are provided on the unit base rails as shown in Fig 5 13 Refer to rigging instructions on unit POSITIONING Maintain clearance per Fig 5 13 around and above unit to pro vide minimum distance from combustible materials proper air flow and service access Do not install unit in an indoor location Do not locate unit air inle...

Page 5: ...AS HEAT ONLY NOTES 1 Unless otherwise specified all dimensions are to outside of part 2 Roof curb accessory CRRFCURB005A00 is shipped disassembled 3 All roof curb parts are to be 14 ga galvanized steel 4 Dimensions in are in millimeters All other dimensions are in inches ...

Page 6: ...1 Unless otherwise specified all dimensions are to outside of part 2 Roof curb accessory CRRFCURB006A00 is shipped disassembled 3 All roof curb parts are to be 14 ga galvanized steel 4 Dimensions in are in millimeters All other dimensions are in inches ...

Page 7: ...ES 1 Unless otherwise specified all dimensions are to outside of part 2 Roof curb accessory CRRFCURB014A00 is shipped disassembled 3 All roof curb parts are to be 14 ga galvanized steel 4 Dimensions in are in millimeters All other dimensions are in inches ...

Page 8: ...8 Fig 5 Base Unit Dimensions 48A2 A3 A6 A7020 035 7 DIMENSIONS ARE IN INCHES MM ...

Page 9: ...side 10 0 3048 for removal of evaporator coil 4 Bottom ducts are designed to be attached to accessory roof curb If unit is mounted on dunnage it is recommended that the ducts be supported by cross braces as done on accessory roof curb 5 Dimensions in are in millimeters All other dimensions are in inches Operating weight includes largest indoor fan motor micro channel heat exchanger modulating powe...

Page 10: ...10 Fig 7 Base Unit Dimensions 48A4 A5 A8 A9020 035 6 DIMENSIONS ARE IN INCHES MM ...

Page 11: ...Top of units no overhang Condenser coil 4 0 1219 Economizer side 6 0 1829 Heat side 4 0 1219 Filter access side 10 0 3048 for removal of evaporator coil 4 For smaller service and operational clear ances contact Carrier application engineer ing department 5 Bottom ducts are designed to be attached to accessory roof curb If unit is mounted on dunnage it is recommended that the ducts be supported by ...

Page 12: ...8 162 90 4138 17 47 444 43 43 1103 92 63 2353 141 86 3603 7 50 190 19 06 484 17 91 455 42 31 1075 18 25 464 45 44 1154 OPENING 31 25 795 OPENING HOOD REMOVED DAMPER OPENING WITH HOOD WITH PANEL PANEL REMOVED VIEW A A NO POWER EXHAUST OR BAROMETRIC RELIEF INDOOR BLOWER ACCESS PANEL HEAT SECTION ACCESS PANEL MCHX COILS V F D OVERALL LIFTING SHIPPING DIM LIFTING POSITION BASE FRAME TYP 4 PLACES ECONO...

Page 13: ...LD POWER 89 6 97 177 0 13 20 335 3 5 12 130 0 12 93 328 3 150 47 3822 0 12 63 320 8 43 43 1103 92 63 2353 141 86 3603 7 50 190 19 06 484 17 91 455 VIEW A A INDOOR BLOWER ACCESS PANEL HEAT SECTION ACCESS PANEL MCHX COILS V F D OVERALL LIFTING SHIPPING DIM LIFTING POSITION BASE FRAME TYP 4 PLACES ECONOMIZER HOODS HOODS FIELD INSTALLED INCLUDED WITH UNIT 3 REQ D INDOOR MOTOR ACCESS DOOR HINGED FILTER...

Page 14: ... 25 NPT DRAIN CONN BASE FRAME LIFTING POSITION OVERALL LIFTING SHIPPING DIM MAIN CONTROL BOX INSIDE BASE RAILS 1 375 35 DIA HOLE IN LIFTING LUG V F D V F D VIEW A A A A 3 50 89 NPT FIELD POWER SUPPLY AIR 75 19 NPT LOW VOLTAGE 73 12 1857 42 56 1081 20 18 513 2 10 53 82 02 2083 2 99 76 8 05 204 24 40 620 29 40 747 85 09 2161 311 28 7906 6 22 72 577 94 00 2388 91 50 2324 88 00 2235 49 53 1258 133 69 ...

Page 15: ...HEAT SECTION ACCESS PANEL INDOOR BLOWER ACCESS PANEL CONDENSER COIL BOTH SIDES MAIN CONTROL BOX V F D V F D A A 3 50 89 NPT FIELD POWER 75 19 NPT LOW VOLTAGE LOW SOUND OUTDOOR FAN OPTION ONLY ALL FAN POSITIONS STANDARD OUTDOOR FAN HOOD REMOVED DAMPER OPENING WITH HOOD WITH PANEL PANEL REMOVED VIEW A A NO POWER EXHAUST OR BAROMETRIC RELIEF OVERALL LIFTING SHIPPING DIM LIFTING POSITION BASE FRAME TY...

Page 16: ...48A4 A5 A7 A8 D M S 060 8426 14 1 5 8 3 9 1 4 1763 2072 2259 2333 48A4 A5 A7 A8 E N T 060 8676 13 7 1 4 3 7 1 4 2000 2126 2134 2417 50A2 A3 A6 A7 060 8311 15 5 3 7 3 8 1710 1663 2433 2504 50A4 A5 A7 A8 060 8526 14 8 1 2 3 11 1 8 1613 2078 2484 2351 BASE UNIT WEIGHTS SEE NOTE 7 LB Kg 060 48A2D A3D A6D A7D 7066 3205 48A2E A3E A6E A7E 7306 3314 48A4D A5D A8D A9D 7106 3223 48A4E A5E A8E A9E 7356 3337 ...

Page 17: ...200 Motor Pulley Pitch Diameter 4 8 4 4 5 7 5 2 6 1 5 5 4 4 4 9 5 9 4 4 5 7 5 9 Nominal Motor Shaft Diameter in 11 8 13 8 15 8 11 8 13 8 15 8 13 8 15 8 15 8 13 8 15 8 15 8 Fan Pulley Pitch Diameter in 12 4 8 6 9 1 12 4 11 1 8 7 9 4 8 1 8 7 9 0 9 1 8 7 Nominal Fan Shaft Diameter in 115 16 115 16 115 16 115 16 Belt Quantity 1 2 2 1 1 2 2 2 2 2 2 2 Belt Type BX56 BX50 5VX530 BX56 5VX570 5VX530 BX50 5...

Page 18: ... 6 2 6 7 5 3 5 9 6 5 Nominal Motor Shaft Diameter in 15 8 15 8 17 8 15 8 15 8 17 8 15 8 17 8 17 8 17 8 17 8 21 8 Fan Pulley Pitch Diameter in 8 7 8 7 8 7 9 5 9 5 11 1 9 5 9 5 9 5 9 1 9 5 9 5 Nominal Fan Shaft Diameter in 115 16 115 16 115 16 115 16 Belt Quantity 2 2 2 2 2 2 2 2 2 3 3 3 Belt Type 5VX500 5VX530 5VX550 5VX530 5VX550 5VX590 5VX550 5VX570 5VX570 5VX530 5VX550 5VX570 Belt Length in 50 5...

Page 19: ...ating Power Exhaust 500 500 500 500 500 500 500 725 Electric Heat 110 110 110 110 110 110 110 165 Cu Tube Aluminum Fin Condenser Coil 100 100 100 150 150 187 317 26 Cu Tube Cu Fin Condenser Coil 263 263 263 370 370 512 751 677 OA Hood Crate Packaging Less Hoods Weight 45 45 45 45 45 45 45 45 Packaging Only Outdoor Air Hoods Filters included with unit 170 170 170 170 170 170 170 255 Hail Guards 73 ...

Page 20: ... 5 B 1 625 2B5V86 8 7 B 1 9375 2 5VX530 9 027 10 1 375 848 2BK50 4 4 NONE 1 375 2B5V94 9 4 B 1 9375 2 BX50 8 15 1 625 1059 2B5V56 4 9 B 1 625 2B5V90 8 1 B 1 9375 2 5VX530 10 20 1 625 1187 2B5V58 5 9 B 1 625 2B5V86 8 7 B 1 9375 2 5VX530 11 030 10 1 375 856 2BK50 4 4 H 1 375 2B5V94 9 0 B 1 9375 2 BX50 8 15 1 625 1096 2B5V56 5 7 B 1 625 2B5V90 9 1 B 1 9375 2 5VX530 9 20 1 625 1187 2B5V58 5 9 B 1 625 ...

Page 21: ...27 2227 2227 2227 2227 2227 2227 2227 2227 2227 2227 2227 2227 2227 2227 2227 2227 2227 2227 2227 2227 2227 2227 2227 2227 4106 4106 4106 4106 4106 4106 INCHES 97 2 96 1 95 6 93 6 92 7 92 3 95 2 94 0 93 6 91 6 90 6 90 3 95 9 94 8 94 2 92 7 91 7 91 3 121 8 120 3 118 8 116 5 115 1 113 9 119 5 118 1 116 6 114 3 112 9 111 7 184 9 177 6 170 4 176 5 169 6 163 3 MM 2469 2441 2428 2379 2354 2344 2417 2389...

Page 22: ...onnect to the unit with a single duct for all supply openings and with a single duct for all return openings Splitting of the airflow into branch ducts should not be done at the unit Sufficient duct length should be used prior to branching to ensure the air temperatures are well mixed within the ductwork See Fig 7 8 10 and 11 for duct opening dimen sions Secure all ducts to building structure Air ...

Page 23: ...lab Mount Shown Step 7 Install Gas Piping Unit is equipped for use with natural gas Installation must con form with local building codes or in the absence of local codes with the National Fuel Gas Code ANSI Z223 1 Install manual gas shutoff valve with a 1 8 in NPT pressure tap for test gage connection at unit Field gas piping must include sedi ment trap and union See Fig 22 A 1 8 in NPT is also lo...

Page 24: ...le for use with aluminum or copper wire See Fig 23 Units have circuit breakers for compressors fan motors and control circuit The unit must be electrically grounded in accordance with local codes or in absence of local codes with NEC ANSI C1 latest year Fig 23 Field Power Wiring Connections FIELD POWER SUPPLY Unit is factory wired for voltage shown on unit nameplate Field wiring can be brought int...

Page 25: ...tion on improper line voltage or ex cessive phase imbalance constitutes abuse and may cause damage to electrical components On 208 230 v units transformers 1 5 are wired for 230 v If 208 230 v unit is to be run with 208 v power supply the transformers must be rewired as follows For transformer 1 move the black wire connected to terminal H2 and connect it to terminal H3 For transformers 2 4 used fo...

Page 26: ...ith T55 and T56 space temperature sensors that use a 10K thermistor The T56 sensor also has the capability for a con figurable temperature set point offset For variable air volume ap plications only the T55 sensor can be used Install sensor according to the installation instructions included with accessory sensor Locate sensor assembly on a solid interior wall in the conditioned space to sense ave...

Page 27: ...Override If the control is being used with a non Carrier building manage ment system it supports the use of the remote IAQ override switch This should be connected to TB6 terminal 13 and 14 Use of this will require the optional controls expansion module Remote Economizer Position Control The ComfortLink controls will normally control the position of the economizer but it can also support field con...

Page 28: ...s of hood sides being sure to cover mounting holes See Fig 31 6 Apply black seal strip provided to back of hood top mount ing flange Seal strip of hood top mounting flange must press tightly against seal strip of hood side mounting flanges See Fig 31 7 Attach gray foam strip provided to block off baffle on outer face of flange See Fig 32 8 Remove the screws on each end and along top of the outdoor...

Page 29: ...36 Correctly Assembled Bottom Filter Assembly Sizes 040 060 Only Fig 37 Flange and Mounting Angle Pointing Down Fig 38 Bottom Filters Installed with Flange Pointing Down TOP HOOD SIDE HOOD CROSSMEMBER SEAL STRIP BLOCKOFF BAFFLE GRAY FOAM STRIP BLOCK OFF BAFFLE FILTER ASSEMBLY MOUNTING ANGLE FASTENED TO BOTTOM OF FILTER ASSEMBLY FLANGE POINTING DOWN FILTER ASSEMBLY MOUNTING ANGLE FASTENED TO BOTTOM...

Page 30: ...pping Brackets and extra screws are shipped in shrink wrap around the dampers If ordered each unit will have 4 48A020 050 units or 6 48A060 units power exhaust blowers and motors or barometric relief dampers 1 Remove 9 screws holding each damper assembly in place See Fig 43 Each damper assembly is secured with 3 screws on each side and 3 screws along the bottom Save screws 2 Pivot each damper asse...

Page 31: ...TION END 23 28 TYP 42 62 TYP LOCATION BAROMETRIC RELIEF OR POWER EXHAUST SIDE 2 23 28 SIDE 1 42 62 J BOX R A S A NOTE When converting to side return make sure to relocate the return air sensors humidity sensors and smoke detectors The section between the power exhaust and the unit may not always contain return air NOTES 1 Unless otherwise specified all dimensions are to outside of part 2 Dimension...

Page 32: ...th each accessory Configuration of the controls for these accessories as well as the factory installed options can be found in the Controls Start up Operation Service and Troubleshooting book The following is a list of some of the common accessories Thermostats and space temperature sensors LP liquid propane conversion kit Accessory barometric relief damper Accessory power exhaust Non modulating t...

Page 33: ...ot require baffles LEGEND MCHX Microchannel Heat Exchanger RTPF Round Tube Plate Fin Heat Exchanger UNIT SIZE 48A QUANTITY DIMENSION A in mm 020 035 1 78 125 0 125 1984 3 036 050 2 78 125 0 125 1984 3 060 2 118 0 125 2997 3 SIZES 020 035 SIZES 036 050 AND 060 RTPF ...

Page 34: ...rometric relief 3 Run the return air ductwork up to the openings One single duct is recommended to connect to the unit over the return air openings See Fig 46 The return duct must incorporate a minimum 3 4 in flange for connection to the unit cabinet The unit does not have duct flanges for this conversion Side Supply and Return Units 48A4 A5 A8 A9 with Field Installed Power Exhaust in Return Duct ...

Page 35: ...on with the network by viewing a module status report Perform a Modstat using the i Vu tools Field Assistant To install a BT485 terminator push the BT485 terminator on to the BT485 connector located near the BACnet connector NOTE The BT485 terminator has no polarity associated with it To order a BT485 terminator consult Commercial Products i Vu Open Control System Master Prices MS TP WIRING RECOMM...

Page 36: ...tance CL2P TC foam FEP plenum rated See MS TP Installation Guide for specifications W221P 22227 25160PV CLP0520LC 24 AWG single twisted shielded pair low capacitance CL2P TC foam FEP plenum rated See MS TP Installation Guide for specifications W241P 2000F 82841 25120 OR RNET 4 conductor unshielded CMP 18 AWG plenum rated W184C 2099BLB 6302UE 21450 CLP0442 BACnet SHIELD n c NET NET PORT S1 BACnet M...

Page 37: ...alues SPECIFICATION RECOMMMENDATION CABLE Single twisted pair low capacitance CL2P 22 AWG 7x30 TC foam FEP plenum rated cable CONDUCTOR 22 or 24 AWG stranded copper tin plated INSULATION Foamed FEP 0 015 in 0 381 mm wall 0 060 in 1 524 mm O D COLOR CODE Black White TWIST LAY 2 in 50 8 mm lay on pair 6 twists foot 20 twists meter nominal SHIELDING Aluminum Mylar shield with 24 AWG TC drain wire JAC...

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Page 40: ... the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53480274 01 Printed in U S A Form 48A 21SI Pg 40 11 21 Replaces 48A 20SI 2021 Carrier ...

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