Carrier 48FC Series Installation Manual

Page 2 - Gas Valve

2 DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices, which may result in minor personal injury or product and property damage. NOTE is...

Page 3 - See Fig. 1 for 48FC model number nomenclature. See Fig. 2 for; Rated Indoor Airflow; rating for the units covered in this document.; WARNING; /8 in. NPT pipe plug must be installed to prevent gas leaks.; Manifold; Table 1 — Rated Indoor Airflow; MODEL NUMBER

3 MODEL NUMBER NOMENCLATURE AND DIMENSIONS See Fig. 1 for 48FC model number nomenclature. See Fig. 2 for unit dimensional drawings. Figure 2 also shows service clearance dimensions. Rated Indoor Airflow Table 1 lists the rated indoor airflow used for the AHRI efficiency rating for the units covered ...

Page 5 - Fig. 2 — Unit Dimensional Drawing

Page 8 - Table 2 — Operating Weights; Base Unit

8 INSTALLATION Jobsite Survey Complete the following checks before installation.1. Consult local building codes and the NEC (National Elec- trical Code) ANSI/NFPA 70 for special installation requirements. 2. Determine unit location (from project plans) or select unit location. 3. Check for possible ...

Page 9 - Fig. 3 — Roof Curb Details

9 Fig. 3 — Roof Curb Details E E 7/16"[11] 4 9/16"[115.5] 1/4" [7.0] 5' 7-3/8" [1711.3] 1' 4-13/16" [427] INSIDE 1-3/4"[44.4] 2-3/8"[61] 1-3/4"[44.5] 1.00"[25.4] "A" 1-3/4"[44.4] 21.74" [552.2] 5.42" [137.7] 11.96" [303.8] 4.96" [126.0]...

Page 10 - Fig. 4 — Unit Leveling Tolerances; Step 5 — Field Fabricate Ductwork; CAUTION

10 NOTE: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasket supplied with the roof curb as shown in Fig. 3. Improperly applied gasket can also result in air leaks and poor unit performance.Curb should be level. This is necessary for unit drain to function pr...

Page 12 - Fig. 8 — Horizontal Duct Panels In Place; Step 8 — Install Outside Air Hood; Fig. 9 — Typical Access Panel Locations; Filter Access Panel

12 Fig. 8 — Horizontal Duct Panels In Place Step 8 — Install Outside Air Hood ECONOMIZER AND TWO-POSITION DAMPER HOOD PACKAGE REMOVAL AND SETUP (FACTORY OPTION)NOTE: Economizer and two-position damper are not available as factory installed options for single phase (-3 voltage code) models. Two-posit...

Page 13 - Step 9 — Units with Hinged Panels Only; Fig. 14 — Compressor Door Latch Location; Step 10 — Install Flue Hood; Fig. 15 — Flue Hood Details; Step 11 — Install Gas Piping; Screw; Compressor Door

13 Fig. 11 — Indoor Coil Access Panel Relocation Fig. 12 — Economizer Hood Construction Fig. 13 — Economizer Filter Installation Step 9 — Units with Hinged Panels Only If the unit does not have hinged panels, skip this step and continue at Step 10 below.Relocate latch shipped inside the compressor c...

Page 15 - Fig. 19 — Gas Line Piping for 3 to 6 Ton Units

15 Fig. 17 — Thru-the-Base Fitting Assembly (Shown in Shipping Position) Fig. 18 — Thru-Base Connection Fittings To prepare the unit for thru-base connections:1. Remove the “L” bracket assembly from the unit.2. Remove connector plate assembly from the “L” bracket and discard the “L” bracket, but ret...

Page 17 - Fig. 23 — Orifice Hole; Step 12 — Install External Condensate Trap and; Fig. 25 — Condensate Drain Pan Piping Details; Step 13 — Make Electrical Connections; Burner; Base Rail

17 Fig. 23 — Orifice Hole 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. 24. Unit airflow configuration does not determine which drain connection to use. Eit...

Page 18 - Field-Install the NFD Shaft and Handle; Fig. 28 — NFD Enclosure Location; Units Without Non-Fused Disconnect Option

18 Fig. 26 — Power Wiring Connections Fig. 27 — Disconnect Switch and Unit UNITS WITH FACTORY-INSTALLED NON-FUSED DISCONNECTThe factory-installed option non-fused disconnect (NFD) switch is located in a weatherproof enclosure located under the main con- trol box. The manual switch handle and shaft a...

Page 19 - Fig. 30 — Convenience Outlet Location; Installing Weatherproof Cover

19 UNITS WITHOUT FACTORY-INSTALLED NON-FUSED DISCONNECT When installing units, provide a disconnect switch per NEC (Na- tional Electrical Code) of adequate size. Disconnect sizing data is provided on the unit informative plate. Locate on unit cabinet or within sight of the unit per national or local...

Page 20 - Non-Powered Convenience Outlet

20 Fig. 32 — Weatherproof Cover — Shipping Location on Units with Factory Installed DDC (Direct Digital Controller) 1. Remove the blank cover plate at the convenience outlet; dis- card the blank cover. 2. Loosen the 2 screws at the GFCI duplex outlet, until approxi- mately 1/2 in. (13 mm) under scre...

Page 21 - Fig. 34 — Powered Convenience Outlet Wiring; Fuse On Power Type

21 Fig. 34 — Powered Convenience Outlet Wiring Fuse On Power Type The factory fuse is a Bussmann ™1 Fusetron ™1 T-15, non-renewable screw-in (Edison base) type plug fuse.Test the GFCI receptacle by pressing the TEST button on the face of the receptacle to trip and open the receptacle. Check for prop...

Page 22 - Fig. 35 — Low-Voltage Thermostat Connections; Thermostat Wiring, Units Without Thru-Base Connection Kit; Fig. 36 — Field Control Wiring Raceway; Humidi-MiZer Space RH Controller; Fig. 37 — Accessory Field-Installed Humidistat; Raceway

22 Fig. 35 — Low-Voltage Thermostat Connections Thermostat Wiring, Units Without Thru-Base Connection Kit Pass the thermostat control wires through the hole provided in the corner post; then feed the wires through the raceway built into the corner post to the control box. Pull the wires over to the ...

Page 23 - Connecting the Carrier Humidistat (HL38MG029); Fig. 39 — Humidistat Connections to UCB; Humidistat

23 Connecting the Carrier Humidistat (HL38MG029) 1. Route the humidistat 2-conductor cable (field-supplied) through the hole provided in the unit corner post. 2. Feed wires through the raceway built into the corner post (refer to Fig. 36) to the 24-v barrier located on the left side of the control b...

Page 28 - Integrated Gas Controller; Fig. 45 — Flue Gas Pressure Switch and Pressure

28 Integrated Gas Controller This unit contains an Integrated Gas Controller (IGC) board. The IGC control board uses a flue gas pressure switch that senses pres- sure drop in the heat exchanger due to the combustion inducer. See Fig. 45. Fig. 45 — Flue Gas Pressure Switch and Pressure Sense Tube (Ty...

Page 29 - Fig. 47 — Typical IGC Control Wiring Diagram; UNIT CONTROL; Table 7 — IGC Board LED Alarm Codes

29 Fig. 47 — Typical IGC Control Wiring Diagram UNIT CONTROL BOARD Table 7 — IGC Board LED Alarm Codes a,b,c,d LED FLASH CODE DESCRIPTION ACTION TAKEN BY CONTROL RESET METHOD PROBABLE CAUSE On Normal Operation — — — Off Hardware Failure No gas heating. — Loss of power to the IGC. Check 5 amp fuse on...

Page 30 - Dehumidification System; Table 8 — Humidi-MiZer System Control Modes

30 Humidi-MiZer ® Dehumidification System (Optional) Units with the factory-installed Humidi-MiZer system option are capable of providing multiple modes of improved dehu- midification as a variation of the normal cooling cycle. The Humidi-MiZer system option includes additional valves in the liquid ...

Page 33 - Interface Overview; NOTE: QR codes in this image are for reference only.

33 EconomizerONE (Factory Option) ECONOMIZER SETTINGS Interface Overview EconomizerONEThis option consists of the following: • Low Leak Economizer Assembly• HH79NZ039 OA (Outdoor Air) Dry Bulb Sensor• HH79NZ039 Mixed Air Sensor• POL224 Controller• 48TC005897 Harness POL224 Economizer Module WiringTh...

Page 34 - Functions; Fig. 59 — Hysteresis Settings; Power; Table 9 — LED Indication; On

34 Fig. 56 — Powering the EconomizerONE Controller Fig. 57 — Menu Structure Descriptions Fig. 58 — LED Indication Functions Free Cooling EconomizingFree cooling uses unconditioned outside air to cool the space di- rectly. The economizer controller enables or disables free cooling after it judges whi...

Page 37 - sensor is connected); FAN TYPE

37 Cooling Delay via Increasing Fan SpeedIf there is cooling demand while outside air is suitable for econo- mizing, then the economizer controller tries to increase fan speed to maximize the use of outside air first. If the cooling demand is not reached within a set time, then mechanical cooling wi...

Page 39 - Mounting Devices Connected to the Economizer Controller; Fig. 60 — EconomizerONE Control Wiring

39 WIRING Mounting Devices Connected to the Economizer Controller Devices like damper actuators, sensors (temperature sensor, humidity sensor, combination temperature and humidity sensor, CO 2 sensor), thermostats, and exhaust fans can be connected to the economizer controller. For information on ho...

Page 40 - Table 18 — EconomizerONE Control Wiring Settings; LABEL

40 Table 18 — EconomizerONE Control Wiring Settings NO. LABEL TYPE DESCRIPTION 1 + RS485 Modbus A Line A 2 - RS485 Modbus B Line B 3 ¬ GND_ISO Earth Ground 4 MAT Type II NTC 10K or 0-10 vdc Mixed or Discharge Air Temperature Sensor 5 COM COM Mixed or Discharge Air Temperature Sensor Common 6 OAT Typ...

Page 41 - Connecting Peripheral Devices to the Economizer Controller; Fig. 61 — Temperature Sensor Connection

41 Connecting Peripheral Devices to the Economizer Controller See Fig. 61-65 for wiring details. Fig. 61 — Temperature Sensor Connection Fig. 62 — Relative Humidity Sensor Connection • Outside Air: Connect to theOAT and COMterminals of thedevice. • Return Air (Differential):Connect to the RATand S-C...

Page 42 - Outside; Connect to the

42 Fig. 63 — Combination Temperature/Humidity Sensor Connection Fig. 64 — CO 2 / Pressure Sensor Connection Fig. 65 — Damper Actuator Connection Outside CombinationTemperature/Humidity: Connectto the OAT, COM,and OAH terminalsof the device. Return CombinationTemperature/Humidity: Connectto the RAT, ...

Page 43 - Administrator

43 SETUP AND CONFIGURATION Set up and configure the economizer controller before putting it into usage. This can be accomplished by using the Climatix ™ mo- bile application or the inbuilt display. After sensor, compressor, thermostat, or actuator is connected to the economizer controller, values/st...

Page 44 - Table 19 — Status Display

44 Table 19 — Status Display PARAMETER DESCRIPTION VALUE 1FREECOOL Indicates whether the system can use outdoor air for free cooling. YES NO 1ECON ENAB Indicates whether outdoor air is being used for the first stage of cooling. 1OCCUPIED Indicates whether the space is occupied. If users choose ALWAY...

Page 45 - Table 20 — Parameter Settings — Basic

45 Table 20 — Parameter Settings — Basic PARAMETER DESCRIPTION RANGE DEFAULT 2 TEMP OFF Temperature shutoff setpoint can be obtained automatically if a smartphone or tablet with the mobile application installed on it is connected to the network provided by a Wi-Fi/WLAN stick plugged into the economi...

Page 47 - Table 23 — Alarm Parameters; Table 24 — Test Commands

47 6Y2O Choose “ COOL 2 ” if Cooling Stage 2 is available (another compressor is connected to the Economizer). Otherwise, choose “ NONE ”. COOL 2 NONE COOL 2 6AUX1-O Auxiliary DO-1. Configurable as: • None. • Exhaust fan (1 or 2). • Alarm output to thermostat (Title 24). NONE ALARM EXHAUST EXHAUST 6...

Page 48 - Enthalpy Control Sensor Configuration; Table 25 — Enter Running State; Table 26 — Enter Configuration State and Restart

48 INSTALLING OPTIONAL HH57LW001 SINGLE OUTSIDE AIR ENTHALPY SENSORWhen using the HH57LW001 enthalpy sensor (see Fig. 66) for outside air changeover, the existing HH79NZ039 dry bulb sensor (see Fig. 67) must be removed. The enthalpy sensor will be mounted in the same location as the dry bulb sensor ...

Page 49 - Actuator

49 Fig. 66 — HH57LW001 Dimensional, Connection and Switching Information Fig. 67 — HH79NZ039 Dry Bulb and Mixed Air Sensor Wiring Fig. 68 — EconomizerONE Component Locations (CRECOMZR108A00 Shown) Fig. 69 — California Title 24 Zones Actuator HH79NZ039Outside Air TemperatureSensor Outside AirDamper W...

Page 51 - Table 28 — California Title 24 Regional High Limit; Table 29 — HH57LW001 Sensor Wiring Terminations

51 Economizers are shipped standard with an HH79NZ039 outside air dry bulb sensor (see Fig. 67). System default setting (high temp limit) is 63°F (17°C) and has a range of 48°F to 80°F (9°C to 27°C). Sensor is factory installed on economizer.NOTE: A second HH79NZ039 sensor is provided for mixed air ...

Page 53 - Table 30 — Operating Issues and Concerns

53 TROUBLESHOOTINGFor EconomizerONE troubleshooting issues see Table 30. Table 30 — Operating Issues and Concerns SYMPTOM REASON SOLUTION An alarm is displayed on the LCD Sensor, damper, or the whole working system may not work properly Check sensor, damper, or the whole working system following the...

Page 54 - Installed Option RTU Open Multi-Protocol Controller Controls,; SystemVu; Series Single Package Rooftop Units with SystemVu Controller; Controller Options; Completing Return Air Smoke Sensor Installation; Shipping Position

54 RTU Open Controller (Factory Option) For details on operating 48FC**04-07 units equipped with the factory-installed RTU Open controller option, refer to the Factory- Installed Option RTU Open Multi-Protocol Controller Controls, Start-Up, Operation and Troubleshooting manual. SystemVu ™ Controller...

Page 56 - Step 16 — Fan Speed Set Up; Fig. 73 — UCB Fan Speed Controls — 3-Phase Units; Fan Speed Set Up Controls

56 Step 16 — Fan Speed Set Up UNITS WITH ELECTROMECHANICAL CONTROLSThe fan speed set up controls are located on the lower section of the Unit Control Board (UCB). See Fig. 73 for the location on 3-phase voltage units or Fig. 74 for the location on single phase voltage units.1. Check the job specific...

Page 57 - Calculator; CFM; Economizer; UNIT MODEL

57 Fig. 76 — Example of Fan Speed Set Up Labels for Electromechanical Controls UNITS WITH SYSTEMVU ™ CONTROLS On units equipped with the factory-installed SystemVu control- ler, the Fan Speed settings are accessed through the SystemVu interface.1. Check the job specifications for the cfm (cubic feet...

Page 58 - RPM; DETERMINE RPM FROM BELOW; UNIT CONFIGURATIONS; IDF VENT SPD -RPM; SETTINGS

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480419-01 Printed in U.S.A. Form No. 48FC-4-7-05SI Rev. B Pg 58 3-24 Replaces: 48FC-4-7-04SI © 2024 Carrier Fig. 77 — Example of Fan Spe...

Page 59 - NOTE: To avoid injury to personnel and damage to equipment or

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480419-01 Printed in U.S.A. Form No. 48FC-4-7-05SI Rev. B Pg CL-1 3-24 Replaces: 48FC-4-7-04SI START-UP CHECKLIST FOR 48FC**04-07 SINGLE...