Carrier WeatherMaker 48FC Series Installation Instructions Manual
  1. Manuals
  2. Brands
  3. Carrier Manuals
  4. Air Conditioner
  5. 48FC Series
  6. Installation instructions manual
Carrier WeatherMaker 48FC Series Installation Instructions Manual

Carrier WeatherMaker 48FC Series Installation Instructions Manual

Single package rooftop with gas heat/electric cooling
Hide thumbs Also See for WeatherMaker 48FC Series:
Table of Contents

Advertisement

Quick Links

CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 3
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . 11
Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . 11
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . 13
Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . 13
Ductwork (When Required) . . . . . . . . . . . . . . . . . 14
Step 8 - Install Outside Air Hood . . . . . . . . . . . . . . 15
Step 9 - Install Flue Hood . . . . . . . . . . . . . . . . . . . . 16
Step 10 - Install Gas Piping . . . . . . . . . . . . . . . . . . 16
Trap and Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Integrated Gas Controller . . . . . . . . . . . . . . . . . . . . . 31
(Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480421-01
Installation Instructions
Page
Printed in U.S.A.
Form No. 48FC-8-14-02SI Rev. A
Single Package Rooftop with
Gas Heat/Electric Cooling
• DEHUM/MECH COOLING (SUBCOOLING) MODE
EconomizerONE (Factory Option) . . . . . . . . . . . . . .35
Step 14 - Install Accessories . . . . . . . . . . . . . . . . .57
Step 15 - Fan Speed Set Up . . . . . . . . . . . . . . . . . .57
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . CL-1

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified service personnel should install, repair, or
service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters and replacing filters. All other operations
should be performed by trained service personnel. When working
on air-conditioning equipment, observe precautions in the
literature, tags and labels attached to the unit, and other safety
precautions that may apply.
Follow all safety codes, including ANSI (American National
Standards Institute) Z223.1. Wear safety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire
extinguisher available for all brazing operations.
It is important to recognize safety information. This is the safety-
alert symbol
. When you see this symbol on the unit and in
instructions or manuals, be alert to the potential for personal
injury.
Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. These words are used with the safety-alert symbol.
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 used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.
Pg 1
WeatherMaker
48FC 08-14
3-24
Replaces: 48FC-8-14-01SI
®

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the WeatherMaker 48FC Series and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Carrier WeatherMaker 48FC Series

Summary of Contents for Carrier WeatherMaker 48FC Series

  • Page 1: Table Of Contents

    ® WeatherMaker 48FC 08-14 Single Package Rooftop with Gas Heat/Electric Cooling Installation Instructions • DEHUM/MECH COOLING (SUBCOOLING) MODE CONTENTS • DEHUMIDIFICATION (HOT GAS REHEAT) MODE Page • REHEAT CONTROL SAFETY CONSIDERATIONS ....1 EconomizerONE (Factory Option) .
  • Page 2 AVERTISSEMENT DANGER RISQUE D’INTOXICATION AU MONOXYDE DE ELECTRICAL SHOCK HAZARD CARBONE Failure to follow this warning will result in personal injury or Si ces directives ne sont pas suivies, cela peut entraîner des death. blessures graves ou une intoxication au monoxyde de carbone pouvant causer la mort, si des produits de combustion Before performing service or maintenance operations on unit, s’infiltrent dans le bâtiment.

  • Page 3: General

    GENERAL Rated Indoor Airflow (cfm) These installation instructions cover the 48FC size 08-14 units Table 1 lists the rated indoor airflow used for the AHRI efficiency with gas heat and electric cooling. Units are pre-wired and pre- rating for the units covered in this document. charged with environmentally balanced Puron (R-410A) refrig- ®...
  • Page 4 Position: 9 10 11 12 13 14 15 16 17 18 Example: Unit Heat Type Packaging Compliance 48 — Gas Heat Packaged Rooftop 0 = Standard 1 = LTL Model Series - WeatherMaker ® FC — Standard Efficiency (EcoBlue™ Technology) Electrical Options A = None C = Non-Fused Disconnect...
  • Page 5 Fig. 2 — Unit Dimensional Drawing – Sizes 08, 09, 12...
  • Page 6 Fig. 2 — Unit Dimensional Drawing – Sizes 08, 09, 12 (cont)
  • Page 7 Fig. 2 — Unit Dimensional Drawing – Sizes 08, 09, 12 (cont)
  • Page 8 Fig. 3 — Unit Dimensional Drawing – Size 14...
  • Page 9 Fig. 3 — Unit Dimensional Drawing – Size 14 (cont)
  • Page 10 Fig. 3 — Unit Dimensional Drawing – Size 14 (cont)

  • Page 11: Installation

    10. Make electrical connections INSTALLATION 11. Install other accessories Step 1 — Plan for Unit Location PAD-MOUNTED INSTALLATION Select a location for the unit and its support system (curb or other) that provides for the minimum clearances required for safety. This Prepare pad and unit supports includes the clearance to combustible surfaces, unit performance Check and tighten the bottom condensate drain connection...
  • Page 12 THIRD ANGLE DIMENSIONS ARE IN INCHES PROJECTION TOLERANCES ON: THIS DOCUMENT AND THE INFORMATION CONTAINED THEREIN IS PROPRIETARY TO CARRIER CORPORATION AND SHALL NOT 1 DEC 2 DEC 3 DEC BE USED OR DISCLOSED TO OTHERS, IN WHOLE OR IN PART, MATERIAL WITHOUT THE WRITTEN AUTHORIZATION OF CARRIER CORPORATION.

  • Page 13: Slab Mount (Horizontal Units Only)

    If a plenum return is used on a vertical unit, the return should be ducted through the roof deck to comply with applicable fire codes. A minimum clearance is not required around ductwork. CAUTION PROPERTY DAMAGE HAZARD Failure to follow this caution may result in damage to roofing in.

  • Page 14: Positioning On Curb

    Position all seal strips in place “B” before installing unit on roof curb 36"-54" Detail “A” as close to this end as possible (914-1371) Duct End See Detail “A” “C” “A” DIMENSIONS MAX WEIGHT UNIT 48FC**08 1265 88.0 2235 40.0 1015 41.5 1055...

  • Page 15: Step 8 - Install Outside Air Hood

    Step 8 — Install Outside Air Hood Removable Horizontal Return Duct Opening Cover ECONOMIZER HOOD PACKAGE REMOVAL  (FACTORY OPTION) The hood is shipped in knock-down form and must be field assembled. The indoor coil access panel is used as the hood top while the hood sides, divider and filter are packaged together, attached to a metal support tray using plastic stretch wrap, and shipped in the return air compart-...

  • Page 16: Economizer Hood Setup

    ECONOMIZER HOOD SETUP NOTE: If the power exhaust accessory is to be installed on the unit, the hood shipped with the unit will not be used and must be discarded. Save the aluminum filter for use in the power exhaust hood assembly.

  • Page 17: Factory-Option Thru-Base Gas Connections

    Table 3 — Natural Gas Supply Line Pressure Ranges 9 in. Minimum Clearance UNIT MODEL UNIT SIZE MIN. MAX. For Panel Removal 4.0 in. wg 13.0 in. wg Regulator * 48FCD/E/F/S/R/T 08, 09, 12, 14 Manual Gas (996 Pa) (3240 Pa) Shutoff Valve * Base Unit Table 4 —...
  • Page 18 Other hardware required to complete the installation of the gas High Voltage supply line will include a manual shutoff valve, a sediment trap Conduit (drip leg), and a ground-joint union. A pressure regulator valve Connector Brass Fitting for may also be required (to convert gas pressure from pounds to 3 to 6 Ton Units inches of pressure).

  • Page 19: Step 11 - Install External Condensate

    Check for gas leaks at the field-installed and factory-installed gas lines after all piping connections have been completed. Use soap-and-water solution (or method specified by local codes and/or regulations). 9" (229 mm) MIN. WARNING Burner Access Panel Failure to follow this warning could result in personal injury, death and/or property damage.

  • Page 20: Step 12 - Make Electrical Connections

    FIELD POWER SUPPLY If equipped with optional powered convenience outlet: The power source leads to the convenience outlet’s transformer primary are not factory connected. Installer must connect these leads accord- ing to required operation of the convenience outlet. If an always- energized convenience outlet operation is desired, connect the source leads to the line side of the unit-mounted disconnect.

  • Page 21: Units With Factory-Installed Non-Fused  Disconnect

    Such operation would invalidate any ap- position (the arrow on the black handle knob is at OFF). plicable Carrier warranty. Insert the shaft with the cross pin on the top of the shaft in the horizontal position.

  • Page 22: Convenience Outlets

    A weatherproof cover is now required by UL standards for the Example: Supply voltage is 230-3-60 factory-installed convenience outlets. This cover cannot be AB = 224-v factory-mounted due to its depth; it must be installed at unit instal- BC = 231-v lation.

  • Page 23: All Units

    208, 230 L2: BLU+YEL H2+H4 Thermostat L1: RED Install a Carrier-approved accessory 2-stage thermostat according Splice BLU+YEL H2+H3 L2: GRA to installation instructions included with the accessory. For com- plete economizer function and 2-stage compressor operation, se-...

  • Page 24: Humidi-Mizer® Control Connections

    This device may be a separate humidistat control (contact closes on rise in space RH above control setpoint) or a combination ther- mostat-humidistat control device such as Carrier’s Edge ® Humidistat Thermidistat™ device with isolated contact set for dehumidifica- tion control.

  • Page 25: Typical Unit Wiring Diagrams

    (see Fig. 39). Connect D1 to the R terminal on the UCB. Connect D2 to the HUM termi- nal on the UCB. Refer to the installation instructions included with the Carrier Edge Pro Thermidistat device for ®...
  • Page 26 Fig. 40 — Typical Control Wiring Diagram, Electro-Mechanical with POL224 – 48FC 08-12, 230/460/575-3-60 Units Shown...
  • Page 27 Fig. 41 — Typical Control Wiring Diagram, SystemVu™ Controller – 48FC 08-12 230/460/575-3-60 Unit Shown...
  • Page 28 Fig. 42 — Typical Power Wiring Diagram, for Units with Electro-Mechanical or SystemVu Controllers – 48FC 08-12, 230/460-3-60 Units Shown...
  • Page 29 Fig. 43 — Typical Control Wiring Diagram, Electro-Mechanical with POL224 – 48FC 14, 230/460/575-3-60 Units Shown...
  • Page 30 Fig. 44 — Typical Power Wiring Diagram, for Units with Electro-Mechanical Controller – 48FC 14, 230-3-60 Unit Shown...

  • Page 31: Integrated Gas Controller

    When the thermostat calls for heating, power is sent to W on the Integrated Gas Controller Integrated Gas Controller (IGC) board. An LED (light emitting di- This unit contains an Integrated Gas Controller (IGC) board. The ode) on the IGC board turns on and remains on during normal op- IGC control board uses a flue gas pressure switch that senses pres- eration.
  • Page 32 UNIT CONTROL BOARD Fig. 47 — Typical IGC Control Wiring Diagram Table 8 — IGC Board LED Alarm Codes a,b,c,d ACTION TAKEN BY FLASH DESCRIPTION RESET METHOD PROBABLE CAUSE CONTROL CODE Normal Operation — — — Hardware Failure No gas heating. Loss of power to the IGC.

  • Page 33: Humidi-Mizer Dehumidification System

    Humidi-MiZer Dehumidification System  DEHUM/MECH COOLING (SUBCOOLING) MODE (Optional) This mode increases the latent heat removal and decreases sen- sible cooling compared to normal cooling. This occurs when Units with the factory-installed Humidi-MiZer system option there is a cooling and dehumidification demands. are capable of providing multiple modes of improved dehu- midification as a variation of the normal cooling cycle.
  • Page 34 Indoor Supply Valve 3-Way Valve Condenser Coil Hot Gas Reheat Coil Outdoor Air Expansion Valve (TXV) Compressor Evaporator Coil = Closed Valve = Open Valve Indoor Return Air = 3-Way Valve Fig. 49 — Subcooling Mode – Humidi-MiZer System for 48FC 08-14 Indoor Supply Valve 3-Way...

  • Page 35: Economizerone (Factory Option)

    the harness are made to the C (24 vac common) and R (24 vac EconomizerONE (Factory Option) power) terminals of the economizer controller. See Fig. 53. ECONOMIZER SETTINGS LED Indication Interface Overview NOTE: If different faulty events occur at the same time, then EconomizerONE sensor/DAC LED lights up following the priority below: Red ...
  • Page 36 Table 10 — LED Indication FREE SENSOR Power STATUS COOLING DAC LED Yellow Yellow Yellow Commissioning mode Blinking Blinking Blinking Power start up Yellow On Yellow On Yellow On Free cooling is running Green On — — Free cooling is available Green —...
  • Page 37 Table 11 — Free Cooling Functions CONTROL MODE SENSORS USED ENABLE FREE COOLING? The outside air dry bulb temperature is compared with the set temperature OA (outside air) temperature sensor Control Mode 1 shutoff setpoint. • Fixed Dry bulb If the outside air dry bulb temperature is below the temperature shutoff MA (Mixed Air) temperature sensor setpoint, then the outside air is used to meet all or part of the cooling demand.
  • Page 38 Table 12 — 1 and 2-Stage Cooling Stage I/O Logic Table 15 — Different Fan Speeds with Different Configured Outputs ECONOMIZER COOLING COOLING CONDITION MET STAGE 1 STAGE 2 FAN TYPE 1-SPEED COOLING 2-STAGE COOLING • Spd H (regardless of •...
  • Page 39 Table 17 — Different Damper Position Settings with Different Configured Outputs (DCV is Enabled) FAN TYPE 1-STAGE COOLING 2-STAGE COOLING • 2VENTMIN H to 2VENTMAX H (regardless of • 2VENTMIN H to 2VENTMAX H (regardless of 1-SPEED FAN cooling demand, OCC=Yes) cooling demand, OCC=Yes) 2VENTMIN L to 2VENTMAXL ...
  • Page 40 Exhaust Fan Operation Users can enable this function only from the Climatix mobile ap- ™ plication if the related function is available in the current mobile Up to two exhaust fans can be connected to the economizer application version. controller. Fault Detection and Diagnostics •...

  • Page 41: Wiring

    WIRING WARNING Failure to follow this caution may result in damage to equipment. Be sure to allow enough time for compressor startup and shutdown between checkout tests so that the compressors do not short-cycle. Mounting Devices Connected to the Economizer Controller Devices like damper actuators, sensors (temperature sensor, humidity sensor, combination temperature and humidity sensor, sensor), thermostats, and exhaust fans can be connected to...
  • Page 42 Table 19 — EconomizerONE Control Wiring Settings LABEL TYPE DESCRIPTION RS485 Modbus A Line A RS485 Modbus B Line B ¬ GND_ISO Earth Ground Type II NTC 10K or 0-10 vdc Mixed or Discharge Air Temperature Sensor Mixed or Discharge Air Temperature Sensor Common Type II NTC 10K or 0-10 vdc Outside Air Temperature Sensor 0-10 vdc or 4-20mA...
  • Page 43 Connecting Peripheral Devices to the Economizer Controller See Fig. 58-62 for wiring details. • Outside Air: Connect to the Mixed or Discharge Air Temperature Sensor OAT and COM terminals of the Outside Air Temperature Sensor device. • Return Air (Differential): Return Air Temperature Sensor Connect to the RAT and S-COM...
  • Page 44 • Outside Combination Temperature/ Humidity: Connect Combo Temperature and Humidity Sensor to the OAT, COM, and OAH terminals of the device. • Combo Temperature and Humidity Sensor Return Combination Temperature/ Humidity: Connect to the RAT, S-COM, and RAH terminals of the device. Fig.

  • Page 45: Setup And Configuration

    SETUP AND CONFIGURATION NOTE: Parameters and display menus may display differently/dynamically if different applications are config- ured. See Tables 20-27. IMPORTANT: Before setup and configuration, it is recommend- ed to obtain some location-based values, such as shutoff points, IMPORTANT: Not all operations are available on the local or utilize the location services in the Climatix ™...
  • Page 46 Table 20 — Status Display PARAMETER DESCRIPTION VALUE 1FREECOOL Indicates whether the system can use outdoor air for free cooling. 1ECON ENAB Indicates whether outdoor air is being used for the first stage of cooling. Indicates whether the space is occupied. If users choose ALWAYS for 6OCC when configuring I/Os, then the parameter value is YES;...
  • Page 47 Table 21 — Parameter Settings — Basic PARAMETER DESCRIPTION RANGE DEFAULT Temperature shutoff setpoint can be obtained automatically if a smartphone or tablet with the mobile application installed on it is connected to the 2 TEMP OFF 48...80°F; increment by 1 63°F network provided by a Wi-Fi/WLAN stick plugged into the economizer controller.
  • Page 48 Table 22 — Parameter Settings — Advanced PARAMETER DESCRIPTION VALUE/RANGE DEFAULT 3FREEZE POS Anti-freeze protection damper position (closed or minimum). 3SD ACT POS Damper position during shutdown (open or closed). MAT sensor location: • Choose MAT if the sensor is installed before the DX (Direct Expansion) coil. 3DIF T LOC •...
  • Page 49 Table 23 — Parameter Settings — I/O Configurations (cont) PARAMETER DESCRIPTION VALUE DEFAULT Choose “COOL 2” if Cooling Stage 2 is available (another compressor is COOL 2 6Y2O COOL 2 connected to the Economizer). Otherwise, choose “NONE”. NONE Auxiliary DO-1. Configurable as: NONE •...

  • Page 50: Installing Optional Hh57Lw001 Single  Outside Air Enthalpy Sensor

    Table 26 — Enter Running State PARAMETER DESCRIPTION 8RUN STATE Change to Running State. Press Enter to confirm the change. 8ENTER RUN? Confirm the change to Running State. Perform factory reset. Press Enter to confirm the reset. (This action resets the controller 8FACTORY DEF password to default: OneBT.) 8DEF CONFIRM?
  • Page 51 Fig. 63 — HH57LW001 Dimensional, Connection and Switching Information Fig. 64 — HH79NZ039 Dry Bulb and Mixed Air Sensor Wiring Actuator Wiring Harness HH79NZ039 Outside Air Temperature Sensor Outside Air Damper Fig. 66 — California Title 24 Zones Fig. 65 — EconomizerONE Component Locations (CRECOMZR108A00 Shown)
  • Page 52 U.S. and Canada I-Codes / ASHRAE Zones Climate Zone 1 Climate Zone 5 and Marine Climate Zone 2 Climate Zone 6 Climate Zone 3 Climate Zone 7 and 8 Climate Zone 4 (Except Marine) Fig. 67 — U.S. and Canada Climate Zones Table 28 —...
  • Page 53 Economizers are shipped standard with an HH79NZ039 outside Table 29 — California Title 24 Regional High Limit air dry bulb sensor (see Fig. 64). System default setting (high temp Dry Bulb Temperature Settings limit) is 63°F (17°C) and has a range of 48°F to 80°F (9°C to REQUIRED HIGH LIMIT 27°C).

  • Page 54: Checkout

    CHECKOUT Status Use the Status menu (refer to Table 20) to check the parameter Inspect all wiring connections at the economizer module’s termi- values for the various devices and sensors configured. nals, and verify compliance with the installation wiring diagrams. For checkout, review the Status of each configured parameter and NOTE: For information about menu navigation and use of the perform the Test Commands tests (refer to Table 25).

  • Page 55: Troubleshooting

    TROUBLESHOOTING For EconomizerONE troubleshooting issues see Table 31. Table 31 — Operating Issues and Concerns SYMPTOM REASON SOLUTION An alarm is displayed on the Sensor, damper, or the whole working Check sensor, damper, or the whole working system following the detailed alarm information. system may not work properly DAC LED is blinking RED Damper slippage...

  • Page 56: Systemvu™ Controller (Factory Option)

    COMPLETING INSTALLATION OF RETURN-AIR SystemVu™ Controller (Factory Option) SMOKE SENSOR For details on operating 48FC**08-14 units equipped with the factory-installed SystemVu controller option, refer to the FC/GC Unscrew the two screws holding the return-air smoke Series Single Package Rooftop Units with SystemVu Controller detector assembly.

  • Page 57: Step 13 - Adjust Factory-Installed Options

    NOTE: The Fan Speed Set Up labels are located on the High Step 13 — Adjust Factory-Installed Options Voltage cover in the Control Box. SMOKE DETECTORS Connect a multimeter to the vdc terminals on the UCB. Smoke detector(s) will be connected at the Unit Control Board Set the Range Switch to either A, B, or C per the Switch (UCB), at terminals marked “Smoke Shutdown.”...
  • Page 58 ESP in. wg Factory Setting: Calculator 9.0 V 3000 Field Setting: 3250 Record field setting here 3500 3750 4000 Switch Range: 4250 4500 4.1 - 7.5 4750 10.0 6.9 - 8.7 5000 7.7 - 10.0 Field Accessories: Economizer * Overlap in A, B, C switch range designed for maximum field adjustment potential.

  • Page 59: Units With Systemvu™ Controls

    UNITS WITH SYSTEMVU™ CONTROLS Use the DOWN arrow key highlight the UNIT CONFIGU- RATIONS menu then press ENTER. On units equipped with the factory-installed SystemVu control- ler, the Fan Speed settings are accessed through the SystemVu Highlight UNIT CONFIGURATIONS then press ENTER. interface.
  • Page 62 © 2024 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480421-01 Printed in U.S.A. Form No. 48FC-8-14-02SI Rev. A Pg 62 3-24 Replaces: 48FC-8-14-01SI...

  • Page 63: Start-Up Checklist

    START-UP CHECKLIST 48FC Packaged Rooftop Units with Gas Heat and Electric Cooling (Remove and use for job file) NOTE: To avoid injury to personnel and damage to equipment or property when completing the procedures listed in this start-up checklist, use good judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preceding sections of this Installation Instruction document.
  • Page 64 (Y/N) _______ 10. Restore set-points for thermostat and humidistat (Y/N) _______ © 2024 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480421-01 Printed in U.S.A.

This manual is also suitable for:

Weathermaker 48fc 08 eriesWeathermaker 48fc 09 seriesWeathermaker 48fc 12 seriesWeathermaker 48fc 14 series

Table of Contents

Save PDF