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Installation Instructions 50LC Single Package Rooftop Cooling Only with Puronr (R---410A) Refrigerant Sizes: 04, 05, 06 Installation Instructions NOTE: Read the entire instruction manual before starting the installation TABLE OF CONTENTS SAFETY CONSIDERATIONS.................... 2 All Units................................ 19 Convenience Outlets....................... 20 INSTALLATION............................... 6 HACR.................................. 21 Jobsite Survey................................ 6 Factory--Option Thru--Base Connections...... 21 Step 1 --Plan for Unit Location.................. 6 Units without Thru--Base Connections......... 22 Roof Mount............................... 6 Field Control Wiring....................... 22 Step 2 -- Plan for Sequence of Unit Installation...... 6 Thermostat............................... 22 Curb--Mount Installation..................... 6 Unit without Thru--Base Connection Kit....... 22 Pad--Mount Installation...................... 7 Heat Anticipator Settings................... 23 Frame--Mount Installation.................... 7 Electric Heaters............................ 23 Step 3 --Inspect Unit........................... 7 Single Point Boxes & Supplementary Fuses.... 24 Step 4 -- Provide Unit Support................... 7 Single Point Boxes without Fuses............ 24 Roof Curb Mount.......................... 7 Low--Voltage Control Connections............ 24 Slab Mount (Horizontal Units Only)........... 7 Humidi--MiZerR Control Connections.......... 25 Alternate Unit Support (In Lieu of Curb or Slab Mount).............. 7 Humidi--MiZer -- Space RH Controller........ 25 Step 5 --Field Fabricate Ductwork................ 9 EconoMi$er X (Factory Option)............... 27 For Units with Accessory Electric Heaters...... 9 ComfortLINK (Factory Option)............... 27 Step 6 --Rig and Place Unit..................... 9 RTU Open Control System................... 29 Positioning on Curb....................... 10 Supply Air Temperature (SAT) Sensor......... 32 Step 7 -- Convert to Horizontal and Connect Outdoor Air Temperature (OAT) Sensor....... 33 Ductwork........................... 11 EconoMi$er2............................. 33 Step 8 --Install Outside Air Hood............... 11 Field Connections.......................... 33 Economizer Hood Package Removal and Setup — Space Temperature (SPT) Sensors............ 33 Factory Option............................ 11 Indoor Air Quality (CO2)Sensor............. 34 Economizer Hood Hood.................... 12 Outdoor Air Quality Sensor................. 35 Step 9 -- Units with Hinged Panels Only.......... 12 Space Relative Humidity Sensor or Humidistat... 35 Step 10 -- Install External Condensate Trap Smoke Detector/Fire Shutdown (FSD)......... 36 and Line............................ 13 Connecting Discrete Inputs.................. 36 Step 11 --Make Electrical Connections........... 13 Communication Wiring --Protocols............ 37 Field Power Supply........................ 13 General................................. 37 Units with Factory--Installed Non--Fused Disconnect or HACR....................... 18 Local Access............................. 38 Units without Factory--Installed Non--Fused RTU Open Troubleshooting................. 38 Disconnect or HACR...................... 19 Outdoor Air Enthalpy Control................. 39 Differential Enthalpy Control................ 39 ! WARNING Return Air Enthalpy Sensor................. 39 ELECTRICAL SHOCK HAZARD Smoke Detectors........................... 40 Failure to follow this warning could cause personal Step 12 -- Adjust Factory--Installed Options........ 47 injury or death. Step 13 --Install Accessories................... 47 Before performing service or maintenance operations on unit, turn off main power switch to unit and install APPENDIX -- VFD Operation with Remote Keypad.. 48 lock(s) and lockout tag(s). Ensure electrical service to rooftop unit agrees with voltage and amperage listed START--UP CHECKLIST....................... 58 on the unit rating plate. Unit may have more than one power switch. SAFETY CONSIDERATIONS Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical ! WARNING shock or other conditions which may cause personal injury or property damage. Consult a qualified installer, UNIT OPERATION AND SAFETY HAZARD service agency, or your distributor or branch for Failure to follow this warning could cause personal information or assistance. The qualified installer or injury, death and/or equipment damage. 50LC agency must use factory--authorized kits or accessories Puronr (R--410A) refrigerant systems operate at when modifying this product. Refer to the individual higher pressures than standard R--22 systems. Do not instructions packaged with the kits or accessories when use R--22 service equipment or components on Puron installing. refrigerant equipment. Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloths for brazing operations and have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions attached to ! WARNING the unit. Consult local building codes and appropriate PERSONAL INJURY AND ENVIRONMENTAL national electrical codes (in USA, ANSI/NFPA 70, HAZARD National Electrical Code (NEC); in Canada, CSA C22.1) Failure to follow this warning could cause personal for special requirements. injury or death. It is important to recognize safety information. This is the Relieve pressure and recover all refrigerant before safety--alert symbol . When you see this symbol on the system repair or final unit disposal. unit and in instructions or manuals, be alert to the Wear safety glasses and gloves when handling potential for personal injury. refrigerants. Keep torches and other ignition sources away from refrigerants and oils. Understand the signal words DANGER, WARNING, CAUTION, and NOTE. These words are used with the safety--alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or ! CAUTION death. WARNING signifies hazards which could result in CUT HAZARD personal injury or death. CAUTION is used to identify unsafe practices, which may result in minor personal Failure to follow this caution may result in personal injury or product and property damage. NOTE is used to injury. highlight suggestions which will result in enhanced Sheet metal parts may have sharp edges or burrs. Use installation, reliability, or operation. care and wear appropriate protective clothing, safety glasses and gloves when handling parts and servicing air conditioning equipment. 2 Position: 12345678910 11 12 13 14 15 16 17 18 Example: 50LCD006A1A5A0A0A 0 Unit Heat Type Packaging 50 - Electric Cooling/Heating 0 = Standard Packaged Rooftop 1 = LTL Model Series - WeatherExpertTM Electrical Options LC - Ultra High Efficiency A = None B = HACR Circuit Breaker C = Non-Fused Disconnect Heat Options D = Thru-The-Base Connections 0 = Standard, No Electric Heat E = HACR Circuit Breaker D = Low Electric Heat and Thru-The Base Connections E = Medium Electric Heat F = Non-Fused Disconnect and F = High Electric Heat Thru-The-Base Connections Refrig. Systems Options Service Options 0 = Two stage cooling capacity 0 = None A = Two stage cooling capacity 1 = Unpowered Convenience Outlet with Humidi-MiZer System 2 = Powered Convenience Outlet 3 = Hinged Panels 50LC Cooling Tons 4 = Hinged Panels and 04 - 3 ton Unpowered Convenience Outlet 05 - 4 ton 5 = Hinged Panels and 06 - 5 ton Powered Convenience Outlet Sensor Options Air Intake / Exhaust Options A = None A = None B = RA Smoke Detector B = Temperature Economizer with Barometric Relief C = SA Smoke Detector E = Enthalpy Economizer with Barometric Relief D = RA + SA Smoke Detector N = Ultra Low Leak Temperature Economizer E = CO2 with Barometric Relief F = RA Smoke Detector and CO2 R = Ultra Low Leak Enthalpy Economizer with G = SA Smoke Detector and CO2 Barometric Relief H = RA + SA Smoke Detector and CO2 Base Unit Controls Indoor Fan Options 0 = Base Electromechanical Controls 0 = Standard Electrical (Direct) Drive x13 ECM Motor 1 = RTU Open Multi-Protocol Controller 2 = Medium Static Belt Drive with VFD controller 2 = ComfortLink Controls* 3 = High Static Belt Drive with VFD controller Design Revision Coil Options: Fin/Tube (Condenser- Evaporator - Hail Guard) A = Factory Design Revision A = Al/Cu - Al/Cu B = Precoat Al/Cu - Al/Cu Voltage C = E-coat Al/Cu - Al/Cu 1 = 575/3/60 D = E-coat Al/Cu - E-coat Al/Cu 5 = 208-230/3/60 E = Cu/Cu - Al/Cu 6 = 460/3/60 F = Cu/Cu - Cu/Cu M = Al/Cu -Al/Cu — Louvered Hail Guard N = Precoat Al/Cu - Al/Cu — Louvered Hail Guard * Not available for units equipped with Humidi-MiZer P = E-coat Al/Cu - Al/Cu — Louvered Hail Guard Q = E-coat Al/Cu - E-coat Al/Cu — Louvered Hail Guard R = Cu/Cu - Al/Cu — Louvered Hail Guard S = Cu/Cu - Cu/Cu — Louvered Hail Guard C13385 Fig. 1 -- 50LC 04--06 Model Number Nomenclature (Example) 3 50LC Vertical Connections / Economizer Horizontal Connections / Economizer C12098 Fig. 2 -- Dimensional Drawing 4 50LC C12099 Fig. 2 -- Unit Dimensional Drawing (cont.) C D B A C08337 LOCATION DIMENSION CONDITION 48---in (1219 mm) Unit disconnect is mounted on panel 18---in (457 mm) No disconnect, convenience outlet option A 18---in (457) mm Recommended service clearance 12---in (305 mm) Minimum clearance 40---in (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall) B 36---in (914 mm) Surface behind servicer is electrically non---conductive (e.g., wood, fiberglass)
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