Carrier PACKAGE ROOFTOP 48HC- User Manual

9 A-B 0.5” (13) B-C 1.0” (25) A-C 1.0” (25) MAXIMUM ALLOWABLE DIFFERENCE IN. (MM) C06110 Fig. 5 -- Unit Leveling Tolerances Step 5 — Field Fabricate Ductwork Cabinet return-air static pressure (a negative condition) shall not exceed 0.35 in. wg (87 Pa) with economizer or 0.45 in. wg (112 Pa) without...

10 Positioning on Curb — Position unit on roof curb so that the following clearances are maintained: 1 / 4 in. (6.4 mm) clearance between the roof curb and the base rail inside the front and rear, 0.0 in. clearance between the roof curb and the base rail inside on the duct end of the unit. This will...

11 Hood Parts Plastic Tie WrapQty (2) Screws for Metal TrayQty (2) C08639 Fig. 9 -- Economizer and Two--Position Damper Hood Parts Location 4. Carefully lift the hood assembly (with metal tray) through the filter access opening and assemble per the steps outlined in Economizer Hood and Two–Position ...

12 C12101 Fig. 13 -- Compressor Door Latch Location Step 10 — Install Flue Hood Flue hood is shipped screwed to the basepan beside the burner compartment access panel. Remove from shipping location and using screws provided, install flue hood and screen in location shown in Fig. 14. BLOWERACCESSPANE...

13 LEGEND * Field supplied. NOTE: Follow all local codes. NFGC – National Fuel Gas Code STEEL PIPE NOMINAL DIAMETER (in.) SPACING OF SUPPORTS X DIMENSION (ft) 1 / 2 3 / 4 or 1 1 1 / 4 or larger 68 10 X BASE UNIT BASE RAIL ROOF CURB 9” MINIMUM CLEARANCEFOR PANEL REMOVAL MANUAL GASSHUTOFF VALVE * GASR...

14 DripLeg Shut Off Valve Union Thru-Curb Adapter BurnerAccessPanel 9” (229mm) min Unit Base Rail C07470 Fig. 19 -- Gas Piping C08018 Fig. 20 -- Gas Piping Thru--Base Connections When installing the gas supply line, observe local codes pertaining to gas pipe installations. Refer to the NFPA 54/ANSI ...

15 Step 12 — Install External Condensate Trap and Line The unit has one 3 / 4 -in. condensate drain connection on the end of the condensate pan and an alternate connection on the bottom. See Fig. 22. Unit airflow configuration does not determine which drain connection to use. Either drain connection...

16 C 11 23 Disconnect per NEC 208/230-1-60 or Disconnect per NEC 11 13 13 23 L1 L2 L3 TB C IFC Direct Drive IFM 208/230-3-60 460-3-60575-3-60 Units Without Single Point Box, Disconnect or HACR Option Units With Disconnect or HACR Option L1 L2 L3 2 4 6 1 5 Optional Disconnect Switch Disconnect factor...

17 C12280 Fig. 28 -- Location of HACR Enclosure To field install the HACR shaft and handle: 1. Remove the unit front panel (see Fig. 2).2. Remove (3) hex screws on the HACR enclosure -- (2) on the face of the cover and (1) on the left side cover. 3. Remove the front cover of the HACR enclosure.4. Ma...

19 C08283 UNIT VOLTAGE CONNECT AS PRIMARY CONNECTIONS TRANSFORMER TERMINALS 208, 230 240 L1: RED +YEL L2: BLU + GRA H1 + H3 H2 + H4 460 480 L1: RED Splice BLU + YEL L2: GRA H1 H2 + H3 H4 575 600 L1: RED L2: GRA H1 H2 Fig. 32 -- Powered Convenience Outlet Wiring Fuse on power type: The factory fuse i...

20 Units without Thru--Base Connections — 1. Install power wiring conduit through side panel open- ings. Install conduit between disconnect and control box. 2. Install power lines to terminal connections as shown in Fig. 24. Voltage to compressor terminals during operation must be within voltage ran...

21 Humidi--MiZer R Control Connections Humidi--MiZer – Space RH Controller —NOTE : The Humidi--MiZer is a factory installed option which is only available for units equipped with belt--drivemotors. Humidi--MiZer is not available for single phase (--3 voltage code) models.The Humidi--MiZer dehumidifi...

22 HUMIDISTAT C101272 Fig. 39 -- Typical Humidi--MiZer R Adaptive Dehumidification System Humidistat Wiring Rc Rh W1 G Y2 C O/W2/B Y1 OAT RRS SRTN HUM D1D2 V+ Vg X* C G W2 W1 Y2 Y1 R EDGE Pro THERMIDISTAT Unit CTB THERMOSTAT *Connection not required. Humidi-MiZer™ FIOP C09298 Fig. 40 -- Typical Roof...

23 Low Ambient Control (Factory Option) If the unit comes with Electro--Mechanical (EM) control, then no adjustment is necessary. If the unit comes with PremierLink t or RTU Open control option, then refer to its installation control manual for details on adjusting “Cooling Lock--Out” setting and co...

28 PremierLink t (Factory--Option) C08199 Fig. 46 -- PremierLink Controller The PremierLink controller (see Fig. 46) is compatible with Carrier Comfort Network r (CCN) devices. This control is designed to allow users the access and ability to change factory--defined settings, thus expanding the func...

31 Supply Air Temperature (SAT) Sensor — On FIOP--equipped 48HC unit, the unit is supplied with a supply--air temperature (SAT) sensor (33ZCSENSAT). This sensor is a tubular probe type, approx 6--inches (152 mm) in length. It is a nominal 10--k ohm thermistor. The SAT is factory--wired. The SAT prob...

33 Space Sensors — The PremierLink controller is factory--shipped configured for Space Sensor Mode. A Carrier T--55 or T--56 space sensor must be used. T--55 space temperature sensor provides a signal of space temperature to the PremierLink control. T--56 provides same space temperature signal plus ...

34 Economizer Controls Indoor Air Quality (CO 2 ) Sensor — The indoor air quality sensor accessory monitors space carbon dioxide (CO 2 ) levels. This information is used to monitor IAQ levels. Several types of sensors are available, for wall mounting in the space or in return duct, with and without ...

35 Space Relative Humidity Sensor or Humidistat Connections —NOTE : The accessory space relative humidity sensor and humidistat are not available for single phase (--3 voltage code) models. Space Relative Humidity Sensor connections: The accessory space relative humidity sensor (33ZCSENSRH-01) is in...

37 Communications Bus Wire Specifications: The CCN Communication Bus wiring is field--supplied and field--installed. It consists of shielded 3--conductor cable with drain (ground) wire. The cable selected must be identical to the CCN Communication Bus wire used for the entire network. See Table 6 fo...

38 RTU Open Control System The RTU Open control is factory--mounted in the 48HC unit’s main control box, to the left of the CTB. See Fig. 68. Factory wiring is completed through harnesses connected to the CTB. Field connections for RTU Open sensors will be made at the Phoenix connectors on the RTU O...

41 Table 8 – RTU Open Controller Inputs and Outputs POINT NAME BACnet OBJECT NAME TYPE OF I/O CONNECTION PIN NUMBER(S) DEDICATED INPUTS Space Temp / Zone Temp zone_temp AI (10K Thermistor) J20 --- 1, 2 Supply Air Temperature sa_temp AI (10K Thermistor) J2 --- 1, 2 Outdoor Air Temperature oa_temp AI ...

42 Field Connections Field connections for accessory sensors and input devices are made the RTU Open, at plugs J1, J2, J4, J5, J11 and J20. All field control wiring that connects to the RTU Open must be routed through the raceway built into the corner post as shown in Fig. 36. The raceway provides t...

44 Relative Humidity Sensor (Polarized Male Connector) J4-1 or J4-4 + 24 VDC Supply Voltage J4-2 or J4-5 (-) 4 to 20 mA Current Loop Output to RTU-OPEN 4-20 VAC GND 0-5V mA or or VDC 0-10V SPAN ZERO C10839 Fig. 77 -- Duct Relative Humidity Sensor Typical Wiring Humidistat: The accessory humidistat p...

45 Communication Wiring -- Protocols General — Protocols are the communication languages spoken by control devices. The main purpose of a protocol is to communicate information in the most efficient method possible. Different protocols exist to provide different kinds of information for different ap...

46 Local Access BACview 6 Handheld: The BACview 6 is a keypad/display interface used to connect to the RTU Open to access the control information, read sensor values, and test the RTU, see Fig. 81. This is an accessory interface that does not come with the RTU Open controller and can only be used at...

47 Table 9 – LEDs The LEDs on the RTU Open show the status of certain functions If this LED is on... Status is... Power RTU Open has power Rx RTU Open is receiving data from the network segment Tx RTU Open is transmitting data over the network segment DO# The digital output is active The Run and Err...

48 To wire the return air enthalpy sensor, perform the following: 1. Use a 2--conductor, 18 or 20 AWG, twisted pair cable to connect the return air enthalpy sensor to the enthalpy controller. 2. Connect the field--supplied RED wire to (+) spade connector on the return air enthalpy sensor and the (+)...

49 Ta bl e1 0–U ni tW ir e/ F us e orH A C R B re ak erS iz in gD at a. UNIT NOM. V --- P h --- H z IFM TYP E NO C .O .or UNP W R C .O . w/ P W RD C.O . NO P. E . w/ P. E. (pwr d fr /uni t) NO P. E. w/ P. E .(pwr d fr /unit) MC A FU SE or HAC R BRK R DI SC .S IZ E MC A FU S E or HA CR BRKR DI SC .S ...

53 53 Legend and Notes for Tables 10 and 11 LEGEND: BD --- Belt drive indoor fan motor BRKR --- Circuit breaker CO --- Convenient outlet DD --- Direct drive indoor fan motor DISC --- Disconnect FLA --- Full load amps IFM --- Indoor fan motor LRA --- Locked rotor amps MCA --- Minimum circuit amps PE ...

54 C09302 Fig. 86 -- EconoMi$er IV Wiring Step 14 — Adjust Factory--Installed Options Smoke Detectors — Smoke detector(s) will be connected at the Controls Connections Board, at terminals marked “Smoke Shutdown”. Cut jumper JMP 3 when ready to energize unit. EconoMi$er IV Occupancy Switch — Refer to...

55 START-UP CHECKLIST (Remove and Store in Job File) I. PRELIMINARY INFORMATION MODEL NO.: SERIAL NO.: DATE: TECHNICIAN: II. PRE-START-UP (insert checkmark in box as each item is completed) j VERIFY THAT JOBSITE VOLTAGE AGREES WITH VOLTAGE LISTED ON RATING PLATE j VERIFY THAT ALL PACKAGING MATERIALS...

56 j VERIFY THAT 3-PHASE FAN MOTOR AND BLOWER ARE ROTATING IN CORRECT DIRECTION. j VERIFY THAT 3-PHASE SCROLL COMPRESSOR IS ROTATING IN THE CORRECT DIRECTION j VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS GENERAL j SET ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO MATCH JOB REQUIREMENTS (IF ...