Carrier WeatherExpert 50N2 Manuel d'installation

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

10Table 5 — Return Fan Drive DataTable 6 — Refrigerant ChargeFANMOTOR HPMOTOR RPMMOTOR SHAFT SIZE (in.)FAN RPMFAN SHAFT SIZE (in.)DRIVE SHEAVE BROWNIN

11Fig. 2 — Roof Curb 0'-1"[25.4] 0'-3"[76.2] 0'-1 3/4"[44]"D" SUPPORTSEE CONDENSERSECTION 10'-8 7/8"

12Step 6 — Install Field-Fabricated DuctworkField-fabricated ductwork for vertical supply/vertical returnunits must be attached to the roof curb, or t

13NOTES:2. DIMENSIONS ARE IN INCHES [ MILLIMETERS].3. ROOF CURB: 14 GA.[VA03-56] STL. ROOF CURB PANS: 16 GA. [VA03-56] STL. CROSS SUPPORTS: 14 G

14Fig. 4 — Gasket Location on Roof Curb SUPPLYRETURN12345 ALONG SUPPLY SECTION END RAILa48-872455Fig. 5 — Gasket Location — Condenser Section Roof Cur

15NOTE: Rig with 8 cables and spread with minimum (2) 148" spreader bars.ALL PANELS MUST BE IN PLACE WHEN RIGGING.CAUTION - NOTICE TO RIGGERS:A (

16NOTE: Rig with 10 cables and spread with minimum 148" spreader bars.ALL PANELS MUST BE IN PLACE WHEN RIGGING.CAUTION - NOTICE TO RIGGERS:75 14,

17NOTE: Rig with 4 cables and spread with (2) 148" spreader bars.ALL PANELS MUST BE IN PLACE WHEN RIGGING.CAUTION - NOTICE TO RIGGERS:A (in.)B (i

18Fig. 9 — Weight Distribution and Center of Gravity1A300BCond End 0 0Return End0024NOMINAL CAPACITY(tons)CORNER WEIGHTS (lb)TOTAL (lb)CENTER OF GRAVI

19Fig. 10 — 50N Unit Sizes N, P, Q (75-105 Ton Nominal Capacity)A50-8823

2INSTALLATIONStep 1 — Perform Jobsite Survey — Completethe following checks before installation.1. Consult local building codes and the NEC (Nation

20Fig. 10 — 50N Unit Sizes N, P, Q (75-105 Ton Nominal Capacity) (cont)NOMINAL CAPACITY/EFFICIENCYEXTENDED CHASSISSUPPLY FANFIELD USE FILTER SECTIONBL

21Fig. 11 — 50N Unit Sizes R, S, T (120-150 Ton Nominal Capacity)a50-8824

22Fig. 11 — 50N Unit Sizes R, S, T (120-150 Ton Nominal Capacity) (cont)NOMINAL CAPACITY/EFFICIENCYEXTENDED CHASSISFIELD USE FILTER SECTIONBLANK SECTI

23Step 9 — Install Outdoor Hoods — Unit sizes 75to 105 nominal tons have three hoods on both sides. Unit sizes120 to 150 nominal tons have four hoods

24Step 11 — Make Field Electrical ConnectionsPOWER WIRING — Units are factory wired for the voltageshown on the unit nameplate. The main terminal bloc

25Operating Voltage — Operating voltage to the unit must bewithin the voltage range indicated on the unit nameplate. Volt-ages between phases must be

26Table 7 — Motor Limits LEGEND NOTE:Extensive motor and electrical testing on the Carrier units hasensured that the full ho

27Step 12 — Connect Air Pressure Tubing — Be-fore options such as the variable frequency drive (VFD) and/ormodulating power exhaust can operate proper

28 Fig. 23 — Control Box Component Arrangementa48-8731

29Step 16 — Install Supply-Air Thermistors —Supply-air thermistors are a field-installed, factory-pro-vided component. Three supply-air thermistors ar

3ABCDEFa48-8682MINIMUM SPACING (ft)UNIT A B C D E F48 Series12 8 12 10 10 1050 Series10 8 8 10 10 10Fig. 1 — Multiple Unit Minimum Separation

30Table 8 — SGC Thermistor DesignationsSGC — Staged Gas ControllerTwo-Piece Unit Fit Up1. Locate and remove split parts package from return sec-tion o

31Table 10 — 120-150 Nominal Ton Units Parts ListITEM COMPONENT NUMBER QUANTITY COMPONENT NAME COMPONENT QUALIFIER1 48NG501939 2 RAIL, MOUNTING SPLIT,

32L BRACKETSa50-8881Fig. 30 — L Bracket RemovalINSTALL TAR TAPE ON ENTIRE BASE RAIL EDGEA50-8882Fig. 31 — Tar Tape Locationa50-8883Fig. 32 — Secure Ba

33TOP CAPSEND CAPSTOP COVERa50-8887Fig. 36 — Main Unit and Return Section Top Cover AssembliesRUN GROUND WIRE (GRN/YEL)FROM JUNCTION BOX TOCROSS RAIL

34CONTROLS INSTALLATIONConstant Volume (CV) / Staged Air Volume(SAV™) Units — The 50N units may be used in applica-tions with additional control featu

35 Route thermostat cable or equivalent leads of colored wirefrom subbase terminals through conduit into the low voltageconnections in the main contro

36Fig. 42 — Space Temperature Averaging WiringNOTE: Use T-55 sensor only.REDBLKSENSOR 1SENSOR 2SENSOR 3SENSOR 4SENSOR 1SENSOR 2SENSOR 4SENSOR 5SENSOR

37FIELD INSTALLED (FIELDSUPPLIED) JUMPER WHENENTHALPY SWITCH NOT USEDRCBJ465Fig. 44 — Outdoor Air Enthalpy Switch Wiringa48-8478MBBJ878TB201Fig. 45 —

38Fig. 47 — Fan Status Switch WiringRXBJ4a48-8741Fig. 48 — Space and Return Air Humidity Sensor WiringCEMJ6OA HUMIDITY4 - 20 maSPACE HUMIDITY4 - 20 ma

39REDBRNFig. 49 — Return Air CO2 Sensor Wiringa48-8483Fig. 50 — Return Air Smoke Detector WiringTB201TB20112PL45-1PL45-3PL45-2PL45-6PL45-5PL45-4a48-87

4Table 1 — Physical Data 50N Sizes N-T (75-150 Tons Nominal Capacity) LEGEND * Base unit includes: economizer dampers and h

40RCB J4TB 202141516171819Fig. 52 — Purge, Evacuation, and Pressurization Wiringa48-8486TB201MBBJ5Fig. 53 — CCN Connectionsa48-8487

41Carrier Comfort Network® (CCN) Interface —The 50N Series units can be connected to the CCN system ifdesired. The communication bus wiring is supplie

42MS/TP WIRING RECOMMENDATIONS — Recommen-dations are shown in Tables 12 and 13. The wire jacket and ULtemperature rating specifications list two acc

43Table 12 — MS/TP Wiring Recommendations LEGENDTable 13 — Open System Wiring Specifications and Recommended Vendors

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

5Table 1 — Physical Data 50N Sizes N-T (75-150 Tons Nominal Capacity) (cont) BASE UNIT N P Q R S TNOMINAL CAPACITY (tons) 7

6Table 1 — Physical Data 50N Sizes N-T (75-150 Tons Nominal Capacity) (cont) LEGENDBASE UNIT N P Q R S TNOMINAL CAPACITY (to

7Table 2 — Operating Weights of Options and Accessories (lb) LEGENDNOTE: Please refer to E-CAT for selection.OPTION OR ACCES

8Table 2 — Operating Weights of Options and Accessories (lb) (cont) LEGENDNOTE: Please refer to E-CAT for selection.OPTION O

9Table 3 — Supply Fan and Drive DataTable 4 — Power Exhaust Fan and Drive DataFANMOTOR HPMOTOR RPMMOTOR SHAFT SIZE (in.)FAN RPMFAN SHAFT SIZE (in.)DRI