Carrier 48TC- Manuals

10 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) withou...

11 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 back, 0.0 in. clearance between the roof curb and the base rail inside on the duct end of the unit. This will...

12 Two Position Damper Hood Removal and Setup -- Factory Option 1. The hood is shipped in knock--down form and assembled to a metal support tray using plastic stretch wrap. Located in the return air compartment, the assembly’s metal tray is attached to the basepan and also attached to the damper usi...

13 Economizer Hood and Two--Position Hood —NOTE : If the power exhaust accessory is to be installed on the unit, the hood shipped with the unit will not beused and must be discarded. Save the aluminum filter for use in the power exhaust hood assembly. 1. The indoor coil access panel will be used as ...

14 2000 ft (610 m) and/or for use with liquefied petroleum fuel. See accessory kit installation instructions regarding these accessories. NOTE : Furance gas input rate on rating plate is for installation up to 2000 ft (610 m) above sea level. In U.S.A. the input rating for altitudes above 2000 ft (6...

16 FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in personal injury, death and/or property damage. S Connect gas pipe to unit using a backup wrench to avoid damaging gas controls. S Never purge a gas line into a combustion chamber. S Never test for gas leaks with an open flame...

17 Step 12 — Make Electrical Connections ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Do not use gas piping as an electrical ground. Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury ...

18 C IFC Disconnect factory test leadsand discard. 13 13 L1 L2 L3 208/230-3-60 460-3-60575-3-60 Units Without Disconnect Option Units With Disconnect Option 1 3 5 2 4 6 L1 L2 L3 Factory Wiring Disconnect per NEC Optional Disconnect Switch 11 C09349 Fig. 24 -- Power Wiring Connections Convenience Out...

21 PremierLink t (Factory--Option) — C08199 Fig. 30 -- PremierLink Controller The PremierLink controller (see Fig. 30) 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 fu...

27 The CO 2 sensors are all factory set for a range of 0 to 2000 ppm and a linear mA output of 4 to 20. Refer to the instructions supplied with the CO 2 sensor for electrical requirements and terminal locations. See Fig. 40 for typical CO 2 sensor wiring schematic. 8 7 6 5 4 3 2 1 2 1 H G 24 VAC OR ...

28 Smoke Detector/Fire Shutdown (FSD) — This function is available only when PremierLink is configured for (Space) Sensor Mode. The unit is factory--wired for PremierLink FSD operation when PremierLink is factory--installed. On 48TC*D units equipped with factory--installed Smoke Detector(s), the smo...

29 may not exceed 4000 ft, with no more than 60 total devices on any 1000--ft section. Optically isolated RS--485 repeaters are required every 1000 ft. NOTE : Carrier device default is 9600 band. COMMUNICATION BUS WIRE SPECIFICATIONS — The CCN Communication Bus wiring is field--supplied and field--i...

32 Table 8 – RTU--MP Controller Inputs and Outputs POINT NAME BACnet OBJECT NAME TYPE OF I/O CONNECTION PIN NUMBERS INPUTS Space Temperature Sensor sptsens AI (10K Thermistor) J20 --- 1, 2 Supply Air Temperature sat AI (10K Thermistor) J2 --- 1, 2 Local Outside Air Temperature Sensor oatsens AI (10K...

33 high-- and low--voltage wiring. Pass the control wires through the hole provided in the corner post, then feed the wires thorough the raceway to the RTU--MP. Connect to the wires to the removable Phoenix connectors and then reconnect the connectors to the board. Space Temperature (SPT) Sensors A ...

34 in the space or in return duct, with and without LCD display, and in combination with space temperature sensors. Sensors use infrared technology to measure the levels of CO 2 present in the space air. The CO 2 sensors are all factory set for a range of 0 to 2000 ppm and a linear mA output of 4 to...

35 5, 8, or 9 to Remote Occupancy and normally open (N/O) or normally closed (N/C).Also set MENU → Schedules → occupancy source to DI on/off. Input 8 or 9 is recommended for easy of installation. Refer to Fig. 49 and Table 8 for wire terminations at J5. Power Exhaust (output) Connect the accessory P...

36 Local Access BACview 6 Handheld The BACview 6 is a keypad/display interface used to connect to the RTU--MP to access the control information, read sensor values, and test the RTU, see Fig. 59. This is an accessory interface that does not come with the MP controller and can only be used at the uni...

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

38 SMOKE DETECTORS Smoke detectors are available as factory--installed options on 48TC*D models. Smoke detectors may be specified for Supply Air only or for Return Air without or with economizer or in combination of Supply Air and Return Air. Return Air smoke detectors are arranged for vertical retu...

39 The sensor uses a process called differential sensing to prevent gradual environmental changes from triggering false alarms. A rapid change in environmental conditions, such as smoke from a fire, causes the sensor to signal an alarm state but dust and debris accumulated over time does not. For in...

40 Completing Installation of Return Air Smoke Sensor: 1. Unscrew the two screws holding the Return Air Sensor detector plate. See Fig. 65. Save the screws. 2. Remove the Return Air Sensor and its detector plate.3. Rotate the detector plate so the sensor is facing out- wards and the sampling tube co...

41 Step 13 — Humidi--MiZer t – Space RH Controller — The Humidi--MiZer dehumidification system requires a field--supplied and --installed space relative humidity control device. This device may be a separate humidistat control (contact closes on rise in space RH above control setpoint) or a combinat...

42 POWER 24 VAC NCNO RJ-45 RJ-45 10 6 DDC HUMIDISTAT C09606 Fig. 69 -- Typical Humidi--MiZer 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™...

43 Table 10 – Unit Wire/MOCP Sizing Data UN IT NOM. V --- Ph --- Hz IFM TYPE COMBUSTION FAN MOTOR FLA POWER EXHAUST FLA NO C.O. or UNPWRD C.O. NO P.E. w/ P.E. (pwrd fr/ unit) MCA MOCP DISC. SIZE MCA MOCP DISC. SIZE FLA LRA FLA LRA 48TC* D 08 208/230 --- 3 --- 60 STD 0.48 3.8 38.8 50 41 193 42.6 50 4...

45 Legend and Notes for Table 10 LEGEND: CO --- Convenient outlet DISC --- Disconnect FLA --- Full load amps IFM --- Indoor fan motor LRA --- Locked rotor amps MCA --- Minimum circuit amps MOCP --- Maximum over current protection PE --- Power exhaust UNPWR CO --- Unpowered convenient outlet NOTES : ...

46 Economizer 2 Position Damper Unit Without Economizer or2 Position Damper C08631 Fig. 71 -- EconoMi$er t 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”. Remove jumpe...