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48KC
Single Package Rooftop
Gas Heating/Electric Cooling Unit
with Puronr (R---410A) Refrigerant
Sizes: 04, 05, 06
NOTE: Read the entire instruction manual before starting
the installation
TABLE OF CONTENTS
SAFETY CONSIDERATIONS
Rated Indoor Airflow (cfm)
INSTALLATION
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Jobsite Survey
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Step 1 - - Plan for Unit Location
Roof Mount
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Step 2 - - Plan for Sequence of Unit Installation
Curb- - Mount Installation
Pad- - Mount Installation
Frame- - Mount Installation
Step 3 - - Inspect Unit
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Step 4 - - Provide Unit Support
Roof Curb Mount
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Slab Mount (Horizontal Units Only)
Alternate Unit Support
(In Lieu of Curb or Slab Mount)
Step 5 - - Field Fabricate Ductwork
Step 6 - - Rig and Place Unit
Positioning on Curb
Step 7 - - Convert to Horizontal & Connect Ductwork
Step 8 - - Install Outside Air Hood
Economizer and Two Position Damper Hood
Package Removal and Setup — Factory Option
Economizer Hood and Two- - Position Hood
Step 9 - - Units with Hinged Panels Only
Step 10 - - Install Flue Hood
Step 11 - - Install Gas Piping
Factory- - Option Thru- - Base Connections
(Gas Connections)
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Step 12 - - Install External Condensate Trap and Line
Step 13 - - Make Electrical Connections
Field Power Supply
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Units with Factory- - Installed
Non- - Fused Disconnect
Units without Factory- - Installed
Non- - Fused Disconnect
All Units
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Convenience Outlets
Installation Instructions
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Factory- - Option Thru- - Base Connections
(Electrical Connections)
Units without Thru- - Base Connections
Field Control Wiring
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Thermostat
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Unit without Thru- - Base Connection Kit
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Heat Anticipator Settings
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Humidi- - MiZer
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Humidi- - MiZer - - Space RH Controller
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EconoMi$er
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PremierLinkt (Factory Option)
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Supply Air Temperature (SAT) Sensor
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Outdoor Air Temperature (OAT) Sensor
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EconoMi$er2
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Field Connections
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Space Sensors
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Connect Thermostat
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Configure the Unit for Thermostat Mode
Economizer Controls
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Indoor Air Quality (CO
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Outdoor Air Quality Sensor
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Space Relative Humidity Sensor or
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Humidistat Connections
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Smoke Detector/Fire Shutdown (FSD)
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Filter Status Switch
Supply Fan Status Switch
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Remote Occupied Switch
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Power Exhaust (output)
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CCN Communication Bus
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RTU Open Control System
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Supply Air Temperature (SAT) Sensor
Outdoor Air Temperature (OAT) Sensor
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EconoMi$er2
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Field Connections
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Space Temperature (SPT) Sensors
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Indoor Air Quality (CO
Outdoor Air Quality Sensor
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Space Humidity Sensor or Humidistat
Smoke Detector/Fire Shutdown (FSD)
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Connecting Discrete Inputs
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Communication Wiring - - Protocols
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R
Control Connections
R
X (Factory- - Installed Option)
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Related Manuals for Carrier 48KC A/B04 Series
Summary of Contents for Carrier 48KC A/B04 Series
- Page 1 48KC Single Package Rooftop Gas Heating/Electric Cooling Unit with Puronr (R---410A) Refrigerant Sizes: 04, 05, 06 Installation Instructions NOTE: Read the entire instruction manual before starting Factory- - Option Thru- - Base Connections the installation (Electrical Connections) ....TABLE OF CONTENTS Units without Thru- - Base Connections .
- Page 2 General ....... . . WARNING Local Access ......RTU Open Troubleshooting .
- Page 3 WARNING CAUTION CUT HAZARD UNIT OPERATION AND SAFETY HAZARD Failure to follow this caution may result in personal Failure to follow this warning could cause personal injury. injury, death and/or equipment damage. Sheet metal parts may have sharp edges or burrs. Use Puronr (R- - 410A) refrigerant systems operate at care and wear appropriate protective clothing, safety higher pressures than standard R- - 22 systems.
- Page 4 Position: 9 10 11 12 13 14 15 16 17 18 – Example: Unit Heat Type Factory Assigned 48 - Gas Heat Packaged Rooftop 0 = Standard 1 = LTL Model Series - WeatherMaker ® KC - Standard 14 SEER Efficiency Electrical Options A = None C = Non-Fused Disconnect...
- Page 5 C14238 Fig. 2 - - Unit Dimensional Drawing...
- Page 6 C14239 Fig. 2 - - Unit Dimensional Drawing (cont.)
- Page 7 C08337 LOCATION DIMENSION CONDITION 48--- in (1219 mm) Unit disconnect is mounted on panel 18--- in (457 mm) No disconnect, convenience outlet option 18--- in (457) mm Recommended service clearance 12--- in (305 mm) Minimum clearance 42--- in (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall) 36--- in (914 mm) Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass)
- Page 8 INSTALLATION products could enter the building, and at least 4 ft (1.2 m) from any adjacent building (or per local code). Locate the Jobsite Survey flue assembly at least 10 ft (3.05 m) from an adjacent unit’s fresh air intake hood if within 3 ft (0.91 m) of same Complete the following checks before installation.
- Page 9 Pad- - mounted Installation — not to the unit. The accessory thru- - the- - base power and gas connection package must be installed before the unit Prepare pad and unit supports is set on the roof curb. If field- - installed thru- - the- - roof Check and tighten the bottom condensate drain curb gas connections are desired, use factory- - supplied connection plug...
- Page 10 C13310 Fig. 5 - - Roof Curb Details...
- Page 11 Step 6 — Rig and Place Unit further details see “Step 12 - - Install External Condensate Trap and Line” on page 17. Keep unit upright and do not drop. Spreader bars are required. Rollers may be used to move unit across a roof. CAUTION Level by using unit frame as a reference.
- Page 12 Positioning on Curb — Do not cover or obscure visibility to the unit’s informative data plate when insulating horizontal ductwork. Position unit on roof curb so that the following clearances are maintained: 1/4 in. (6.4 mm) clearance between the Step 8 — Install Outside Air Hood roof curb and the base rail inside the front and rear, 0.0 in.
- Page 13 4. Carefully lift the hood assembly (with metal tray) 3. Remove the shipping tape holding the economizer through the filter access opening and assemble per the barometric relief damper in place (economizer only). steps outlined in Economizer Hood and Two–Position 4.
- Page 14 Step 10 — Install Flue Hood Table 3 – Liquid Propane Supply Line Pressure Ranges Flue hood is shipped screwed to the basepan beside the UNIT MODEL UNIT SIZE burner compartment access panel. Remove from shipping 11.0 in. wg 13.0 in. wg 48KCD/E/S/R* 04, 05, 06 location and using screws provided, install flue hood and...
- Page 15 9” MINIMUM CLEARANCE FOR PANEL REMOVAL REGULATOR MANUAL GAS SHUTOFF VALVE BASE UNIT 48” MINIMUM DRIP LEG PER NFGC BASE RAIL FIELD-FABRICATED BRASS FITTING SUPPORT EMBOSSMENT ROOF FOR 3-6 TON UNITS BRACKET SUPPORT CURB FROM C13411 LEGEND Fig. 17 - - Gas Line Piping for 3 to 5 Ton Units Only NFGC –...
- Page 16 4. Pressure- - test all gas piping in accordance with local and national plumbing and gas codes before connect- ing piping to unit. 9” (229mm) min NOTE: Pressure test the gas supply system after the gas supply piping is connected to the gas valve. The supply Burner piping must be disconnected from the gas valve during the Access...
- Page 17 Step 12 — Install External Condensate Trap Step 13 — Make Electrical Connections and Line WARNING The unit has one -in. condensate drain connection on the end of the condensate pan and an alternate connection ELECTRICAL SHOCK HAZARD on the bottom. See Fig. 22. Unit airflow configuration does not determine which drain connection to use.
- Page 18 Units Without Non-Fused Disconnect Option (1-ph IFM) Disconnect Disconnect 208/230-1-60 208/230-3-60 460-3-60 575-3-60 Units With Non-Fused Disconnect Option C12278 Fig. 26 - - Location of Non- - Fused Disconnect Enclosure To field install the NFD shaft and handle: 1. Remove the unit front pane (see Fig. 2). Optional Factory Disconnect...
- Page 19 Units Without Factory- - Installed Pwd-CO Transformer Non- - Fused Disconnect — Convenience Outlet GFCI When installing units, provide a disconnect switch per NEC (National Electrical Code) of adequate size. Disconnect sizing data is provided on the unit informative Pwd-CO plate.
- Page 20 Non- - powered type: This type requires the field Code Article 210, Branch Circuits, for use of convenience installation of a general- - purpose 125- - volt 15- - A circuit outlets. powered from a source elsewhere in the building. Observe Fuse on power type: The factory fuse is a Bussman national and local codes when selecting wire size, fuse or “Fusetron”...
- Page 21 PremierLink controller (available as factory- - installed Note 2: Y2 to Y2 connection required on single-stage cooling units when option or as field- - installed accessory, for use on a Carrier integrated economizer function is desired. Comfort Network or as a stand alone control) or the RTU...
- Page 22 (units with PremierLinkt control). To connect the Carrier humidistat (HL38MG029): 1. Route the humidistat 2- - conductor cable (field- - sup- plied) through the hole provided in the unit corner post.
- Page 23 C14242 Fig. 36 - - Typical Humidi- - MiZer Adaptive Dehumidification System Humidistat Wiring EDGE Pro THERMIDISTAT Unit CTB THERMOSTAT O/W2/B SRTN Humidi-MiZer™ FIOP *Connection not required. C09298 Fig. 37 - - Typical Rooftop Unit with Humidi- - MiZer Adaptive Dehumidification System with EDGE Pro Thermidistat Device...
- Page 24 EconoMi$er X (Factory- -Installed Option) For details on operating 48KC units equipped with the factory- - installed EconoMi$er option, refer Factory- - Installed Economizers for TC/TCQ/HC/HCQ/ LC/KC/KCQ Rooftop Units, 3 to 27.5 Nominal Tons. Economizer Supplement Related to California Title 24 (Catalog No.
- Page 25 FIOP/accessory EconoMi$er 2 package. function of the standard unit control board. CCN service The PremierLink controller requires the use of a Carrier access tools include System Pilott, Touch Pilott and electronic thermostat or a CCN connection for time Service Tool.
- Page 26 C14245 Fig. 41 - - PremierLink Wiring Schematic...
- Page 27 C14246 Fig. 42 - - PremierLink Wiring Schematic with Humidi- - MiZer...
- Page 28 Supply Air Temperature (SAT) Sensor — NOTE: The sensor must be mounted in the discharge airstream downstream of the cooling coil and any heating On FIOP- - equipped 48KC unit, the unit is supplied with a devices. Be sure the probe tip does not come in contact supply- - air temperature (SAT) sensor (33ZCSENSAT).
- Page 29 LEGEND: --- Space Temperature Sensor FSD --- Fire Shutdown --- Space Temperature Sensor IAQ --- Indoor Air Quality (CO --- Carrier Comfort Network (communication bus) OAQ --- Outdoor Air Quality (CO CMPSAFE --- Compressor Safety RH --- Relative Humidity FILTER...
- Page 30 Space Sensors — J6-7 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 J6-6 provides a signal of space temperature to the PremierLink Jumper control.
- Page 31 Economizer Controls IAQ Sensor Indoor Air Quality (CO ) Sensor — J5-5 The indoor air quality sensor accessory monitors space J5-3 carbon dioxide (CO ) levels. This information is used to 24 VAC monitor IAQ levels. Several types of sensors are available, C08636 Fig.
- Page 32 Space Relative Humidity Sensor or Humidistat The sensor must be mounted vertically on the wall. The Connections — Carrier logo should be orientated correctly when the sensor is properly mounted. NOTE: The accessory space relative humidity sensor and Avoid corner locations. Allow at least 4 ft between the humidistat are not available for single phase (- - 3 voltage sensor and any corner.
- Page 33 4000 ft, with no more than 60 total J4-6 devices on any 1000- - ft section. Optically isolated RS- - 485 repeaters are required every 1000 ft. C08118 Fig. 56 - - PremierLink Wiring Fan Pressure Switch NOTE: Carrier device default is 9600 band. Connection...
- Page 34 Communications Bus Wire Specifications: The CCN Connecting CCN bus: Communication Bus wiring is field- - supplied and NOTE: When connecting the communication bus cable, field- - installed. It consists of shielded 3- - conductor cable a color code system for the entire network is with drain (ground) wire.
- Page 35 RTU Open Control System The RTU Open controller is an integrated component of the Carrier rooftop unit. Its internal application programming provides optimum performance and energy efficiency. RTU The RTU Open control is factory- - mounted in the 48KC Open enables the unit to run in 100% stand- - alone control unit’s main control box, to the left of the CTB.
- Page 36 C14247 Fig. 61 - - RTU Open System Control Wiring Diagram...
- Page 37 C14248 Fig. 62 - - RTU Open System Control Wiring Diagram with Humidi- - MiZer...
- Page 38 Refer to the input configuration and accessory sections of the RTU Open Multi ---Protocol Controller Controls, Start ---Up, Operation and Troubleshooting manual for more detail. The RTU Open controller requires the use of a Carrier Outdoor Air Temperature (OAT) Sensor —...
- Page 39 Space Temperature (SPT) Sensors — for internal connections at the T- - 59. Connect the SEN There are two types of SPT sensors available from Carrier, terminal (BLU) to RTU Open J20- - 1. Connect the COM resistive input non-communicating (T55, T56, and T59) terminal (BRN) to J20- - 2.
- Page 40 Space Relative Humidity Sensor or Humidistat — Do not mount the IAQ sensor in drafty areas such as near supply ducts, open windows, fans, or over heat sources. NOTE: The accessory space relative humidity sensor and Allow at least 3 ft (0.9 m) between the sensor and any humidistat are not available for single phase (- - 3 voltage corner.
- Page 41 J4-1 or J4-4 + 24 VDC Supply Voltage J4-2 or J4-5 (-)4 to 20 mA Current Loop Output to RTU Open Relative Humidity Sensor (Polarized Male Connector) SPAN ZERO 4-20 GND 0-5V 0-10V C12756 Fig. 69 - - Duct Relative Humidity Sensor Typical Wiring Humidistat: The accessory humidistat provides the RTU Fan Status: The fan status accessory is a field- - installed Open insight to the relative humidity in the space.
- Page 42 Communication Wiring - - Protocols The RTU Open can be set to communicate on four different protocols: BACnet, Modbus, N2, and LonWorks. Switch 3 (SW3) on the board is used to set protocol and General — baud rate. Switches 1 and 2 (SW1 and SW2) are used to Protocols are the communication languages spoken by set the board’s network address.
- Page 43 Local Access Field Assistant Field Assistant is a computer program included with the Wall Mounted Equipment Touch purchase of the Tech Tool Kit (USB-TKIT). This is a field Tech Tool to set-up, service, or download application The Equipment Touch is a wall mounted interface used to software to the RTU Open controller and includes a USB connect to the RTU Open to access the control Link Cable.
- Page 44 Table 12 – LEDs The LEDs on the RTU Open show the status of certain functions If this LED is on... Status is... Power The RTU Open has power The RTU Open is receiving data from the network segment The RTU Open is transmitting data over the network segment The binary output is active The Run and Error LEDs indicate control module and network status If Run LED shows...
- Page 45 Return Air Enthalpy Sensor — Return Air Smoke Detector Mount the return- - air enthalpy sensor (33SENTSEN) in (as shipped) the return- - air section of the economizer. The return air sensor wired enthalpy controller (33CSENTHSW). See Fig. 75. PL6-1 (24-V) –...
- Page 48 Legend and Notes for Table 13 LEGEND: Example: Supply voltage is 230-3-60 BRKR --- Circuit breaker AB = 224 v --- Convenience outlet --- Direct drive (indoor fan motor) BC = 231 v DISC --- Disconnect AC = 226 v --- Full load amps --- Indoor fan motor (224 + 231 + 226)
- Page 49 C09302 Fig. 78 - - EconoMi$er IV Wiring Step 14 — Adjust Factory- -Installed Options Manual outside air damper Two- - Position motorized outside air damper Smoke Detectors — EconoMi$er X (with control) Smoke detector(s) will be connected at the Controls EconoMi$er IV (with control) Connections Board, terminals...
- Page 50 Catalog No: 48KC ---4---6---02SI ECarrier Corporation 2018 Edition Date: 4/18 Printed in U.S.A. Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. Replaces: 48KC--- 4--- 6--- 01SI...
- Page 51 UNIT START-UP CHECKLIST (Remove and Store in 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 judgement, follow safe practices, and adhere to the safety considerations/information as outlined in the preceding sections of this Installation Instructions document.
- Page 52 GENERAL j ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS (IF EQUIPPED) j VERIFY SMOKE DETECTOR UNIT SHUTDOWN BY UTILIZING MAGNET TEST III. HUMIDI- -MIZER SYSTEM START-UP NOTE: Units equipped with RTU- - Open controls have Service Test menus or modes that can assist with the Humidi- - MiZer System Start- - Up function and provide the means to make the observations listed for this start- - up.
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