Carrier 48TC**16- Manual

7 A-B 0.5” (13) B-C 1.0” (25) A-C 1.0” (25) MAXIMUM ALLOWABLE DIFFERENCE IN. (MM) A B C C10001 Fig. 4 -- Unit Leveling Tolerances Step 5 — Field Fabricate Ductwork NOTE : Cabinet return-air static pressure (a negative condition) shall not exceed 0.35 in. wg (87 Pa) witheconomizer or 0.45 in. wg (112...

8 Positioning on Curb — For full perimeter curbs CRRFCURB074A00 and 075A00, the clearance between the roof curb and the front and rear base rails should be 1 / 4 in (6.4 mm). The clearance between the curb and the end base rails should be 1 / 2 in (13 mm). For retrofit applications with curbs CRRFCU...

9 Step 8 — Install Outside Air Hood Economizer Hood Removal and Setup -- Factory Option — 1. The hood is shipped in knock--down form and located in the return air compartment. It is attached to the economizer using two plastic tie--wraps. 2. To gain access to the hood, remove the filter access panel...

10 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 ...

11 Step 10 — Install Gas Piping Installation of the gas piping must be accordance with local building codes and with applicable national codes. In U.S.A., refer to NFPA 54/ANSI Z223.1 National Fuel Gas Code (NFGC). In Canada, installation must be accordance with the CAN/CSA B149.1 and CAN/CSA B149.2...

12 NOTE : If gas and/or electrical connections are not going to occur at this time, tape or otherwise cover the fittings so thatmoisture does not get into the building or conduit in theinterim. GASKET CONNECTORPLATEASSEMBLY C10906 Fig. 18 -- Completing Installation of Thru--the--Base Option The thru...

13 When installing the gas supply line, observe local codes pertaining to gas pipe installations. Refer to the NFPA 54/ANSI Z223.1 NFGC latest edition (in Canada, CAN/CSA B149.1). In the absence of local building codes, adhere to the following pertinent recommendations: 1. Avoid low spots in long ru...

14 The piping for the condensate drain and external trap can be completed after the unit is in place. See Fig. 25. NOTE: Trap should be deep enough to offset maximum unit static difference. A 4” (102) trap is recommended . MINIMUM PITCH 1” (25mm) PER 10’ (3m) OF LINE BASE RAIL OPEN VENT TO ROOF DRAI...

15 C10854 Fig. 29 -- Mounting Position for Field Disconnects (up to 100A) Field power wires are connected to the unit at line--side pressure lugs at the main terminal block (TB1) or at factory--installed option non--fused disconnect switch. Max wire size is #2 AWG (copper only). (See Fig. 31.) NOTE ...

16 Units Without Disconnect Option Units With Disconnect Option 2 4 6 1 3 5 L1 L2 L3 Optional Disconnect Switch Disconnect factory test leads; discard. Factory Wiring 11 12 13 L1 L2 L3 TB1 208/230-3-60 460-3-60575-3-60 Disconnect per NEC C10015 Fig. 31 -- Power Wiring Connections Convenience Outlets...

17 Test the GFCI receptacle by pressing the TEST button on the face of the receptacle to trip and open the receptacle. Check for proper grounding wires and power line phasing if the GFCI receptacle does not trip as required. Press the RESET button to clear the tripped condition. C08283 UNIT VOLTAGE ...

19 X C G W2 C W2 G W1 O/B/Y2 Y2 R W1 R Y1 Y1 THERMOSTAT (see Note) Note: Typical multi-function marking. Follow manufacturer’s configuration instructions to select Y2. Do not configure for O output. Field Wiring Central Terminal Board Typical Thermostat Connections C10903 Fig. 38 -- Typical Low--Vol...

20 Humidi--MiZer R Control Connections Humidi--MiZer – Space RH Controller —NOTE : The Humidi--MiZer is a factory installed option. The Humidi--MiZer dehumidification system requires a field--supplied and --installed space relative humidity control device. This device may be a separate humidistat co...

21 HUMIDISTAT C11201 Fig. 42 -- 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. 43 -- Typical Rooft...

22 PremierLink t (Factory Option) C08199 Fig. 44 -- PremierLink Controller NOTE : Refer to Form 33CS--67SI for complete PremierLink configuration, operating sequences andtroubleshooting information. Have a copy of this manualavailable at unit start--up.The PremierLink controller (see Fig. 44) is com...

25 Supply Air Temperature (SAT) Sensor — On FIOP--equipped 48TC**16 units, the unit is supplied with a supply--air temperature (SAT) sensor (33ZCSENSAT). This sensor is a tubular probe type, approx 6--inches (12.7 mm) in length. It is a nominal 10--k ohm thermistor. The SAT is factory--wired. The SA...

27 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 ...

28 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 L...

29 SEN J5-2 J5-3 COM 13 11 TB3 TB3 IAQ Sensor PL 24 VAC C10285 Fig. 57 -- Outdoor CO 2 Sensor Connections Space Relative Humidity Sensor or Humidistat Connections —Space Relative Humidity Sensor connections: The accessory space relative humidity sensor (33ZCSENSRH-01) is installed on an interior wal...

30 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**16 units equipped with factory--installed Smoke Detector(s), the s...

31 CCN Communication Bus — The PremierLink controller connects to the bus in a daisy chain arrangement. Negative pins on each component must be connected to respective negative pins, and likewise, positive pins on each component must be connected to respective positive pins. The controller signal pi...

32 RTU Open Control System The RTU Open control is factory--mounted in the 48TC**16 unit’s main control box, to the left of the CTB. See Fig. 66. 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 R...

35 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 ...

36 Space Temperature (SPT) Sensors — There are two types of SPT sensors available from Carrier, resistive input non-communicating (T55, T56, and T59) and Rnet communicating (SPS, SPPL, SPP, and SPPF) sensors. Each type has a variety of options consisting of: timed override button, set point adjustme...

38 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. 75 -- Duct Relative Humidity Sensor Typical Wiring Humidistat: The accessory humidistat p...

39 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...

40 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. 79. This is an accessory interface that does not come with the RTU Open controller and can only be used ...

41 Table 9 – LEDs The LEDs on the RTU Open Control Board (see Fig. 65) 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 out...

42 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 en- thalpy controller. 2. Connect the field--supplied RED wire to (+) spade con- nector on the return air enthalpy sensor and the...

43 Air is introduced to the duct smoke detector sensor’s sensing chamber through a sampling tube that extends into the HVAC duct and is directed back into the ventilation system through a (shorter) exhaust tube. The difference in air pressure between the two tubes pulls the sampled air through the s...

44 Completing Installation of Return Air Smoke Sensor: 1. Unscrew the two screws holding the Return Air Sensor detector plate. See Fig. 85. 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...

45 Table 10 – Unit Wire/Fuse or HACR Breaker Sizing Data UN IT NOM. V --- Ph --- Hz IFM TYPE COMBUSTION FAN MOTOR POWER EXHAUST NO C.O. or UNPWR C.O. FLA FLA NO P.E. w/ P.E. (pwrd fr/ unit) MCA FUSE or HACR BRKR DISC. SIZE MCA FUSE or HACR BRKR DISC. SIZE FLA LRA FLA LRA 48TC* D 16 208/230--- 3--- 6...

46 Economizer 2 Position Damper Unit Without Economizer or2 Position Damper C10333 Fig. 87 -- EconoMi$er t IV Wiring Step 13 — Adjust Factory--Installed Options Smoke Detectors — Smoke detector(s) will be connected at the Central Terminal Board (CTB), at terminals marked “Smoke Shutdown”. Remove jum...