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50SS018-060
50SX024-060
Single-Package Cooling Units
Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS .................1-12
General......................................1
RECEIVING AND INSTALLATION ...........13-26
Step 1 — Check Equipment..................13
• IDENTIFY UNIT
• INSPECT SHIPMENT
Step 2 — Provide Unit Support ..............13
• ROOF CURB
• SLAB MOUNT
Step 3 — Provide Clearances ................13
Step 4 — Rig and Place Unit.................13
• UN
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REQUIREDCLEARANCESTOCOMBUSTIBLEMATERIAL —in.(mm) Unit Top ................................14 (356) Duct Side of Unit ............................2 (51) Side Opposite Ducts ........................14 (356) Bottom of Unit.................................0 Vertical Discharge First 12 in. (305) of Supply Duct .......1 (25) NECESSARY REQUIRED CLEARANCES — in. (mm) Between Units, Control Box Side ................42 (1067) Unit and Ungrounded Surfaces, Control Box Side ......36 (914) Unit and Block or
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REQUIREDCLEARANCESTOCOMBUSTIBLEMATERIAL —in.(mm) Unit Top ................................14 (356) Duct Side of Unit ............................2 (51) Side Opposite Ducts ........................14 (356) Bottom of Unit.................................0 Vertical Discharge First 12 in. (305) of Supply Duct .......1 (25) NECESSARY REQUIRED CLEARANCES — in. (mm) Between Units, Control Box Side ................42 (1067) Unit and Ungrounded Surfaces, Control Box Side ......36 (914) Unit and Block or
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REQUIRED CLEARANCES TO COMBUSTIBLE MATERIAL — in. (mm) Unit Top ....................................14 (356) CENTER OF GRAVITY (in./mm) Duct Side of Unit.................................2 (51) UNIT Side Opposite Ducts .............................14 (356) 50SS XY Z Bottom of Unit.....................................0 048 21.9/555 19.6/498 13.4/341 Vertical Discharge First 12 in. (305) of Supply Duct...............1 (25) 060 22.2/565 19.8/503 13.4/340 NECESSARY REQUIRED CLEARANCES — in. (mm) Betw
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REQUIRED CLEARANCES TO COMBUSTIBLE MATERIAL — in. (mm) CENTER OF GRAVITY (in./mm) UNIT Unit Top..................................14 (356) 50SS XY Z Duct Side of Unit ..............................2 (51) Side Opposite Ducts ...........................14 (356) 048 21.7/550 19.7/501 15.7/400 Bottom of Unit ..................................0 060 22.0/560 19.9/506 15.7/399 Vertical Discharge First 12 in. (305) of Supply Duct ............1 (25) NECESSARY REQUIRED CLEARANCES — in. (mm) LEGEND Between
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REQUIREDCLEARANCESTOCOMBUSTIBLEMATERIAL—in.(mm) LEGEND Unit Top ................................14 (356) CG — Center of Gravity NEC — National Electrical Code Duct Side of Unit ............................2 (51) COND — Condenser REQ’D — Required Side Opposite Ducts ........................14 (356) MAT’L — Material Bottom of Unit.................................0 Vertical Discharge First 12 in. (305) of Supply Duct .......1 (25) NECESSARY REQUIRED CLEARANCES — in. (mm) Between Units, Control Box
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REQUIREDCLEARANCESTOCOMBUSTIBLEMATERIAL—in.(mm) LEGEND Unit Top ................................14 (356) CG — Center of Gravity NEC — National Electrical Code Duct Side of Unit ............................2 (51) COND — Condenser REQ’D — Required Side Opposite Ducts ........................14 (356) MAT’L — Material Bottom of Unit.................................0 Vertical Discharge First 12 in. (305) of Supply Duct .......1 (25) NECESSARY REQUIRED CLEARANCES — in. (mm) Between Units, Control Box
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Fig. 8 — Dimensions; Units 50SX042-060 Without Base Rail 8
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LEGEND CG — Center of Gravity NEC — National Electrical Code COND — Condenser REQ’D — Required MAT’L — Material REQUIRED CLEARANCES TO COMBUSTIBLE MATERIAL — in. (mm) Unit Top ........................................14 (356) Duct Side of Unit ...................................2 (51) Side Opposite Ducts ...............................14 (356) Bottom of Unit.........................................0 Vertical Discharge First 12 in. (305) of Supply Duct ...........1 (25) NECESSARY REQUIRED CLEARANC
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Fig. 9 — Dimensions; Units 50SX042-060 With Optional Base Rail 10
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LEGEND CG — Center of Gravity NEC — National Electrical Code COND — Condenser REQ’D — Required MAT’L — Material REQUIRED CLEARANCES TO COMBUSTIBLE MATERIAL — in. (mm) Unit Top ........................................14 (356) Duct Side of Unit ...................................2 (51) Side Opposite Ducts ...............................14 (356) Bottom of Unit.........................................0 Vertical Discharge First 12 in. (305) of Supply Duct ...........1 (25) NECESSARY REQUIRED CLEARANC
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PART NUMBER ‘‘A’’ CPRFCURB001A00 89 [203] FLAT CPRFCURB002A00 119 [279] CURB CPRFCURB003A00 149 [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 gage steel. 5. Attach ductwork to curb (flanges of duct rest on curb). 6. Service clearance 4 ft on each side. 7. direction of airflow. 8. Insulated panels, 1-in. thick, fiberglass 1-lb density. Fig. 10 —
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RECEIVING AND INSTALLATION Step 1 — Check Equipment Do not restrict condenser airflow. An air restriction at either the outdoor-air inlet or the fan discharge can be IDENTIFYUNIT—Theunitmodelnumberandserialnum- detrimental to compressor life. ber are stamped on the unit identification plate. Check this information against shipping papers. Do not place the unit where water, ice, or snow from an overhang or roof will damage or flood the unit. Do not INSPECTSHIPMENT—Inspectforshippingdamagewhile insta
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NOTICE TO RIGGERS Hook rigging shackles through holes in lifting brackets, as shown in Detail‘‘A,’’liftingbracketstobecenteredaroundtheunitcenterofgravity.Use wood top skid when rigging, to prevent rigging straps from damaging unit. All panels must be in place when rigging. SHIPPING WEIGHT A B C UNIT SIZE 50SS Lb Kg in. mm in. mm in. mm 3 1 018 260 118 36 ⁄4 934 18 457 24 ⁄8 613 3 3 1 024 289 131 36 ⁄4 934 16 ⁄4 426 24 ⁄8 613 3 5 1 030 306 139 36 ⁄4 934 16 ⁄16 415 24 ⁄8 613 3 1 1 036 322 146 36
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Table 1 — Physical Data — Unit 50SS UNIT 50SS 018 024 030 036 042 048 060 REFRIGERANT R-22 Metering Device Acutrol™ System Charge (lb) 2.60 2.75 3.40 4.30 5.20 6.50 7.00 OPERATING WEIGHT (lb) Without Base Rails 208 237 254 270 300 332 359 With Optional Base Rails 228 257 274 290 320 352 379 COMPRESSOR TYPE Rotary Reciprocating Reciprocating Reciprocating Reciprocating Scroll Scroll EVAPORATOR FAN Centrifugal — Direct Drive Speeds 2 3332 2 2 Nominal Rpm 825 1075 1100 1100 1100 1100 1100 Diameter
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andAirConditioningContractorsAssociation(ACCA)mini- Step5—SelectandInstallDuctwork— Thede- mum installation standards for residential heating and air sign and installation of the duct system must be in accor- conditioning systems. dancewiththestandardsoftheNFPA(NationalFireProtec- tion Association) for installation of nonresidence-type air • Secure all ducts to building structure. Flash, weather- conditioningandventilatingsystems,NFPA90Aorresidence- proof, and vibration-isolate duct openings in
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ACCESS PANEL (REMOVE SCREWS) Fig. 15 — Evaporator Coil Access Panel Fig. 16 — Basepan Insulation Over Vertical Duct Opening 5. Remove indoor blower access panel (Fig. 18). 6. Disconnectevaporator-fanmotorleadsfromevaporator- fan relay and unit contactor. Carefully disengage wire tie containing evaporator-fan motor leads from the unit control box (Fig. 19). 7. Removescrews(Fig.20)securingevaporatorblowerhous- ingtoblowershelfandcarefullyslideoutblowerhous- ing.Thereisafillerbracketattachedtotheblo
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Fig. 21 — Basepan Insulation Over Vertical Discharge Opening INDOOR BLOWER ACCESS PANEL (REMOVE SCREWS) Fig. 18 — Indoor Blower Access Panel WIRE TIE CONTACTOR RELAY Fig. 22 — Insulation and Cover Removed from Vertical Discharge Opening CONVERTING HORIZONTALDISCHARGE UNITS TO DOWNFLOW (VERTICAL) DISCHARGE — ICM (Inte- gratedControlMotor)UNITS—Unitsareshippedinahori- zontalconfiguration.Toconvertahorizontalunitfordown- flow (vertical) discharge, perform the following steps: Fig. 19 — Fan Motor Lead
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7. Removescrewssecuringblowershelftoductpanel.Dis- 13. Orient blower housing for vertical airflow (blower mo- card the blower shelf. tor adjacent to horizontal duct opening). See Fig. 25. Reconnecttheplugassemblies.Slideblowerhousinginto 8. Locatelancesinbasepaninsulationthatareplacedover vertical opening making sure the flanges on the blower the perimeter of the vertical discharge opening cover side plates engage the tabs in the unit basepan. (Fig. 21). Resistance will be felt as the blower housi
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4. Seethefollowingcaution.Usingremainingholesinduct flanges as templates, drill the remaining holes with the no. 26 (.147-in.) drill. BLOWER SHELF 1 Donotdrilldeeperthan ⁄2-in.intoshadedareashown in Fig. 26. Damage to refrigerant coil could result. FILLER BRACKET 5. Fullysecuretheductflangesusingtheremainingscrews provided. RACEWAY 3 The finished kit installation accommodates a 14 ⁄4-in. x 3 14 ⁄4-in. duct. PLUG ASSEMBLIES Fig. 24 — Filler Bracket and Blower Shelf 1 NOTE: Do not drill more than ⁄2-
