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CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 3
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . 7
Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . 8
Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . 8
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . . 8
Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . 10
Step 7 - Convert to Horizontal and Connect . . . . 11
Step 8 - Install Outside Air Hood . . . . . . . . . . . . . . 11
Step 9 - Install Flue Hood . . . . . . . . . . . . . . . . . . . . 12
Step 10 - Install Gas Piping . . . . . . . . . . . . . . . . . . 12
Step 12 - Make Electrical Connections . . . . . . . . . 16
Integrated Gas Controller . . . . . . . . . . . . . . . . . . . . . 27
(Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480422-01
Installation Instructions
Page
Printed in U.S.A.
Form No. 48FC-16-02SI Rev. A
Single Package Rooftop with
Gas Heat/Electric Cooling
EconomizerONE (Factory Option) . . . . . . . . . . . . . .32
SystemVu™ Controller (Factory Option) . . . . . . . . .53
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Step 13 - Adjust Factory-Installed Options . . . . . .54
Step 14 - Install Accessories . . . . . . . . . . . . . . . . .54
Step 15 - Fan Speed Set Up . . . . . . . . . . . . . . . . . .54
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**16
3-24
Replaces: 48FC-16-01SI
®
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Summary of Contents for Carrier WeatherMaker 48FCD16
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Page 1: Table Of Contents
® WeatherMaker 48FC**16 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.
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Page 3: Fire Or Explosion Hazard
GENERAL WARNING These installation instructions cover the 48FC units with gas heat FIRE OR EXPLOSION HAZARD and electric cooling. Units are pre-wired and pre-charged with Failure to follow the safety warnings exactly could result in environmentally balanced Puron ® (R-410A) refrigerant at the serious injury, death or property damage. - 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 — 48FC**16 Unit Dimensional Drawing...
- Page 6 Fig. 2 — 48FC**16 Unit Dimensional Drawing (cont)
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Page 7: Installation
CLEARANCE Service with Service with Operating SURFACE Conductive Barrier Non-conductive Barrier Clearance FRONT 48 in. (1219 mm) 36 in. (914 mm) 18 in. (457 mm) LEFT 48 in. (1219 mm) 42 in. (1067 mm) 18 in. (457 mm) BACK W/O ECONOMIZER 48 in. -
Page 8: Step 2 - Plan For Sequence Of Unit Installation
Step 2 — Plan for Sequence of Unit Installation The support method used for this unit will dictate different se- quences for the steps of unit installation. For example, on curb- mounted units, some accessories must be installed on the unit be- fore the unit is placed on the curb. - Page 9 Fig. 5 — 48FC**16 Roof Curb Details...
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Page 10: Step 6 - Rig And Place Unit
Place All Gasket in Place Before Placing Unit on Roof Curb. (914-1371) “B” 36”-54” “C” Detail “A” Duct End “A” “A” See Detail “A” DIMENSIONS MAX WEIGHT UNIT 48FC**16 2150 116.0 2945 55.5 1410 59.5 1510 NOTE(S): 1. Dimensions in () are in millimeters. 2. -
Page 11: Step 7 - Convert To Horizontal And Connect
Step 7 — Convert to Horizontal and Connect Unit is shipped in the vertical duct configuration. Unit without factory-installed economizer or return air smoke detector option may be field-converted to horizontal ducted configuration using accessory CRDUCTCV002A00. To convert to horizontal config- uration, remove screws from side duct opening covers and remove Remove Hood Parts... -
Page 12: Economizer And Two-Position Damper Hood
ECONOMIZER AND TWO-POSITION DAMPER 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 13: Equipment Damage
NOTE: L'installation de ce générateur de chaleur à des altitudes supérieures à 2000 pi (610 mm) doit être effectuée conformément 9" Minimum Clearance aux instructions accompagnant la trousse de conversion pour For Panel Removal haute altitude fournie avec cet appareil. From Regulator* For natural gas applications, gas pressure at unit gas connection... -
Page 14: All Units
9" (229 mm) MIN. Connector Plate Assembly Thru-Curb Adapter Union Unit Base Rail Gasket Shut Off Valve Drip Fig. 18 — Completing Installation of Thru-the-Base Option NOTE: If gas and/or electrical connections are not going to occur Fig. 20 — Gas Piping with Thru-Curb Accessory at this time, tape or otherwise cover the fittings so that moisture does not get into the building or conduit in the interim. -
Page 15: Install External Condensate Trap And Line
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 ab- sence of local building codes, adhere to the following pertinent recommendations: Avoid low spots in long runs of pipe. -
Page 16: Step 12 - Make Electrical Connections
All units must have an external trap for condensate drainage. Units Without Disconnect Option Install a trap at least 4-in. (102 mm) deep and protect against freeze-up. If drain line is installed downstream from the exter- nal trap, pitch the line away from the unit at 1-in. per 10 ft (25 mm in 3 m) of run. -
Page 17: Field Power Supply
FIELD POWER SUPPLY See Fig. 26. For those units without thru-the-curb power, conduit must be used to route the main power from the condenser end, via the power entry in the corner post of the unit (see Fig. 28 and 29) to either the factory option disconnect or the bottom of the control box. -
Page 18: Units Without Factory-Installed Non-Fused Disconnect
11. Engaging the shaft into the handle socket, re-install (3) hex screws on the NFD enclosure. 12. Re-install the unit front panel. Fig. 32 — Location of Non-Fused Disconnect Enclosure Connect field power supply conductors to LINE side terminals when the switch enclosure cover is removed to attach the handle. Fig. -
Page 19: Convenience Outlets
10%. Use the following formula to determine the percent of voltage imbalance. Operation on improper line voltage or ex- cessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Carrier warranty. Pwd-CO Transformer max voltage deviation from average voltage... -
Page 20: All Units
Non-powered type ALL UNITS Requires the field installation of a general-purpose 125-v 15-A Test the GFCI receptacle by pressing the TEST button on the face circuit powered from a source elsewhere in the building. Observe of the receptacle to trip and open the receptacle. Check for proper national and local codes when selecting wire size, fuse or breaker grounding wires and power line phasing if the GFCI receptacle requirements and disconnect switch size and location. -
Page 21: Humidi-Mizer® Control Connections
This device can be a thermostat (field-supplied) or a SystemVu™ This device may be a separate humidistat control (contact closes controller (available as factory-installed option for use on a Carrier on rise in space RH above control setpoint) or a combination ther- Comfort Network ®... -
Page 22: Typical Unit Wiring Diagrams
R terminal on the UCB. Connect D2 to the HUM termi- Fig. 42 — Edge ® Pro Thermidistat nal on the UCB. Refer to the installation instructions Connecting the Carrier Humidistat (HL38MG029) included with the Carrier Edge Pro Thermidistat device for ® Route the humidistat 2-conductor cable (field-supplied) more information. - Page 23 Fig. 45 — Typical Control Wiring Diagram, Electro-Mechanical with POL224 Controller...
- Page 24 Fig. 46 — Typical Control Wiring Diagram, SystemVu™ Controller...
- Page 25 Fig. 47 — Typical Power Wiring Diagram – 208/230, 460-3-60 Unit Shown...
- Page 26 Fig. 48 — Typical Power Wiring Diagram – 575-3-60 Unit Shown...
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Page 27: 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 28 UNIT CONTROL BOARD Fig. 51 — Typical IGC Control Wiring Diagram a, b, c, d Table 8 — IGC Board LED Alarm Codes ACTION TAKEN BY FLASH DESCRIPTION RESET METHOD PROBABLE CAUSE CONTROL CODE Normal Operation — — — Hardware Failure No gas heating.
- Page 29 Pre-purge: Induced draft motor Ignition: Gas valve and Call for heat: starts and runs for 30 seconds at igniter energize for 2 W terminal is energized. ignition speed, Speed 1. seconds. Rectification: Flame sensor activates for 2 seconds after Gas valve and igniter ignition period.
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Page 30: 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 31 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. 54 — Subcooling Mode – Humidi-MiZer System for 48FC**16 Indoor Supply Valve 3-Way...
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Page 32: Economizerone (Factory Option)
LED Indication EconomizerONE (Factory Option) NOTE: If different faulty events occur at the same time, the ECONOMIZER SETTINGS sensor/DAC LED lights up following this priority: Red Interface Overview Yellow Off. For example, if there is a humidity sensor error and air temperature failure at the same time, the sensor LED EconomizerONE turns red rather than yellow. - Page 33 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 34 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 set point. • Fixed Dry Bulb If the outside air dry bulb temperature is below the temperature shutoff set MA (Mixed Air) temperature sensor point, then the outside air is used to meet all or part of the cooling demand.
- Page 35 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 36 Table 17 — Different Damper Position Setting 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 37 • If Exhaust Fan 2 is connected and configured, then Fault Detection and Diagnostics Exhaust Fan 2 parameter group (L, M, and H) is available, The economizer controller can detect and diagnose free cool- depending on fan configuration. ing faults, sensor operation faults, and damper modulating •...
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Page 38: 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, hu- midity sensor, combination temperature and humidity sensor, CO... - Page 39 Table 19 — Economizer 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 40 Connecting Peripheral Devices to the Economizer Controller See Fig. 63-67 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...
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Page 41: Pressure Sensor Connection
• 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 42: 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 recom- mended to obtain some location-based values, such as shutoff points, or utilize the location services in the Climatix ™... - Page 43 Table 20 — Status Display PARAMETER DESCRIPTION VALUE 1FREECOOL Indicates if the system can use outdoor air for free cooling. 1ECON ENAB Indicates if outdoor air is being used for the first stage of cooling. Indicates if the space is occupied. If users choose ALWAYS for 6OCC when configuring I/Os, the parameter value is YES;...
- Page 44 Table 21 — Parameter Settings — Basic PARAMETER DESCRIPTION RANGE DEFAULT Temperature shutoff set point can be obtained automatically if a smartphone or tablet is connected to the network provided by a Wi-Fi/WLAN stick 2 TEMP OFF plugged into the Economizer Controller and the mobile application is 48...80°F;...
- Page 45 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 46 Table 23 — Parameter Settings — I/O Configurations (cont) PARAMETER DESCRIPTION VALUE DEFAULT Choose ACT FB if feedback signal is available from the connected damper ACT FB 6AUX-AI2 ACT FB actuator. Otherwise, choose NONE. NONE Choose “COOL 2” if Cooling Stage 2 is available (another compressor is COOL 2 6Y2O COOL 2...
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Page 47: 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 48 Fig. 68 — HH57LW001 Dimensional, Connection and Switching Information Fig. 69 — HH79NZ039 Dry Bulb and Mixed Air Sensor Wiring Economizer Actuator Outside Air (This End) Damper Wiring Harness Return Air Damper Fig. 70 — EconomizerONE System Component Locations Fig. 71 — California Title 24 Zones...
- Page 49 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. 72 — U.S. and Canada Climate Zones Table 28 —...
- Page 50 Economizers are shipped standard with an HH79NZ039 outside Table 29 — California Title 24 Regional High Limit air dry bulb sensor (refer to Fig. 69). System default setting (high Dry Bulb Temperature Settings temp limit) is 63°F (17°C) and has a range of 48°F to 80°F (9°C to REQUIRED HIGH LIMIT 27°C).
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Page 51: Checkout
CHECKOUT NOTE: All settings are stored in non-volatile flash memory. Status Inspect all wiring connections at the economizer module’s termi- nals, and verify compliance with the installation wiring diagrams. Use the Status menu (refer to Table 20) to check the parameter For checkout, review the Status of each configured parameter and values for the various devices and sensors configured. -
Page 52: 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 53: Systemvu™ Controller (Factory Option)
ADDITIONAL APPLICATION DATA SystemVu™ Controller (Factory Option) For details on operating 48FC**16 units equipped with the Refer to the application data sheet titled “Factory-Installed Smoke factory-installed SystemVu controller option, refer to the FC/GC Detector, for Small and Medium Rooftop Units 2 to 25 Tons” for Series Single Package Rooftop Units with SystemVu Controller discussions on additional control features of these smoke detectors Controls, Start-up, Operation and Troubleshooting manual. -
Page 54: 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 55 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.
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Page 56: 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 58 © 2024 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480422-01 Printed in U.S.A. Form No. 48FC-16-02SI Rev. A Pg 58 3-24 Replaces: 48FC-16-01SI...
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Page 59: Preliminary Information
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 60 (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. 04-53480422-01 Printed in U.S.A.
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