Table of Contents
Advertisement
Quick Links
45MBAAQ
Air Handler Unit Ductless System
Sizes 18K - 60K
Fig. 1 - 45MBAA Unit Sizes 18K - 60K
NOTE: Read the entire instruction manual before starting the
installation. Images are for illustration purposes only.
Actual models may differ slightly.
Installation Instructions
Specifications subject to change without notice.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS........................................................2
ACCESSORIES................................................................................11
MODEL NUMBERS........................................................................11
DIMENSIONS..................................................................................12
ELECTRICAL DATA......................................................................12
INSTALLATION .............................................................................13
Step 1 - Check Equipment ................................................................13
Step 2 - Mount Unit ..........................................................................13
Step 3 - Mount Positions...................................................................14
Step 4 - Select Installation Location.................................................15
Step 5 - Preparation and Precaution for Installation.........................16
Step 6 - Connecting the Wire and Pipes ...........................................19
Step 7 - Refrigerant Piping ...............................................................24
REFRIGERANT PIPING CONNECTION......................................26
AIR-HANDLER REFRIGERANT PIPING CONNECTION..........27
CONNECTION DIAGRAM ............................................................31
WIRING DIAGRAMS .....................................................................33
WIRELESS REMOTE CONTROLLER INSTALLATION............36
STALLATION .................................................................................36
SETTING UP AIRFLOW AND STATIC PRESSURE...................37
FAN PERFORMANCE....................................................................38
TROUBLESHOOTING ...................................................................48
DUCTLESS START-UP CHECKLIST - Single Zone ....................51
PAGE
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for Carrier 45MBAAQ
Summary of Contents for Carrier 45MBAAQ
-
Page 1: Table Of Contents
45MBAAQ Air Handler Unit Ductless System Sizes 18K - 60K Installation Instructions TABLE OF CONTENTS PAGE SAFETY CONSIDERATIONS............2 ACCESSORIES................11 MODEL NUMBERS................11 DIMENSIONS..................12 ELECTRICAL DATA..............12 INSTALLATION ................13 Step 1 - Check Equipment ..............13 Step 2 - Mount Unit ................13 Step 3 - Mount Positions..............14 Step 4 - Select Installation Location..........15... -
Page 2: Safety Considerations
45MBAAQ: Installation Instructions SAFETY CONSIDERATIONS CAUTION Installing, starting up, and servicing air- conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures, etc.). EQUIPMENT DAMAGE HAZARD Only trained, qualified installers and service mechanics should install, Failure to follow this caution may result in equipment damage or start- up, and service this equipment. - Page 3 45MBAAQ: Installation Instructions WARNING WARNING Turn off the air conditioner and disconnect the power before FOR FLAMMABLE REFRIGERANTS performing any installation or repairing. Failure to do so can cause Do not use means to accelerate the defrosting process or to clean, electric shock.
- Page 4 45MBAAQ: Installation Instructions Table 2 — A (min) Ho, release height ft (m) Mc or Mrel (lbs(kgs) ≤ 7.2 (2.2) 7.5 (2.3) 7.9 (2.4) 8.5 (2.6) 9.2 (2.8) 9.8 (3.0) ≤ 3.91 (1.776) 12 (1.10) 4.0 (1.8) 60 (5.53) 57 (5.29) 55 (5.07)
- Page 5 45MBAAQ: Installation Instructions NOTE ON FUSE SPECIFICATIONS WARNING • The air conditioner’s circuit board (PCB) may be designed with a fuse to provide overcurrent protection. This fuse must be replaces with identical component. FOR FLAMMABLE REFRIGERANTS • The specifications of the fuse, if equipped, are printed on the circuit board, examples of such are T5A/250VAC and T10A/250VAC.
- Page 6 45MBAAQ: Installation Instructions COMPATIBILITY Table 5 — Compatibility MULTIZONE HEAT PUMP OUTDOOR UNIT 37MGRAQ18CA3 37MGHAQ18CA3 37MGRAQ24DA3 37MGHAQ24DA3 37MGRAQ30EA3 37MGHAQ30EA3 37MGHAQ48FA3 37MGHAQ55FA3 Indoor Unit 37MGRAQ36EA3 37MGHAQ36EA3 37MGRAQ48FA3 37MGRAQ55FA3 45MBAAQ18XB3 ● ● ● ● ● ● ● 45MBAAQ24XB3 ● ● ● ●...
- Page 7 45MBAAQ: Installation Instructions 1. Installation (where refrigerant pipes are allowed) the minimum floor area of the room shall be mentioned in the form Any person who is involved with working on or breaking into a of a table or a single figure without reference to a formula; after...
- Page 8 45MBAAQ: Installation Instructions 7. Checking for presence of refrigerant 12. Checks to electrical devices The area shall be checked with an appropriate refrigerant detector Repair and maintenance to electrical components shall include initial prior to and during work, to ensure the technician is aware of safety checks and component inspection procedures.
- Page 9 45MBAAQ: Installation Instructions 15. Removal and evacuation Become familiar with the equipment and its operation. When breaking into the refrigerant circuit to make repairs - or for b. Isolate system electrically any other purpose conventional procedures shall be used. However, c.
- Page 10 45MBAAQ: Installation Instructions 20. Unventilated Areas Marking of equipment using signs. Signs for similar appliances used in a work area are generally addressed by local An unventilated area where the appliance using FLAMMABLE regulations and give the minimum requirements for the REFRIGERANTS is installed shall be so constructed that should provision of safety and/or health signs for a work location.
-
Page 11: Accessories
45MBAAQ: Installation Instructions ACCESSORIES The system is shipped with the following accessories. Use all of the installation parts and accessories to install the system. Improper installation may result in water leakage, electrical shock and fire, or cause the equipment to fail. Keep the installation manual in a safe place and do not discard any other accessories until the installation has been completed. -
Page 12: Dimensions
45MBAAQ: Installation Instructions DIMENSIONS Table 10 — Dimensions MODEL (BTU/H) 18K/24K 30K/36K 48K/60K DIMENSIONS inch 1143 1245 1346 inch inch 17-1/2 21-1/50 24-1/2 inch 15-3/4 19-5/16 22-27/32 inch 10-1/4 10-1/4 10-1/4 Unit: Inch/mm) Recommended filter size Depth Thickness Width Fig. 3 — Filter Table 11 —... -
Page 13: Installation
45MBAAQ: Installation Instructions INSTALLATION Step 1 - Check Equipment Step 2 - Mount Unit Unpack the unit and move to the final location. Remove the carton, taking The unit can stand or lie on the floor, or hang from a ceiling or a wall. -
Page 14: Step 3 - Mount Positions
45MBAAQ: Installation Instructions Step 3 - Mount Positions The units can be installed in a vertical (down and up) and horizontal (right and left) configuration. Fig. 5 — Vertical Installations At least 5in(46cm) Horizontal Fig. 6 — Horizontal Installations NOTE: For horizontal installations, a secondary drain pan (not supplied) must be installed. -
Page 15: Step 4 - Select Installation Location
45MBAAQ: Installation Instructions Step 4 - Select Installation Location CAUTION Install the indoor and outdoor units, cables and wires at least 3-1/5ft (1m) from televisions or radios to prevent static or image distortion. Depending on the appliances, a 3-1/5ft (1m) distance may not be sufficient. -
Page 16: Step 5 - Preparation And Precaution For Installation
45MBAAQ: Installation Instructions Step 5 - Preparation and Precaution for Recommended Distances Between the Indoor Unit Installation The distance between the mounted indoor unit should meet the specifications illustrated in Figure 9. WARNING Horizontal Installation There must be an airtight seal between the bottom of the air handler and the return air plenum. -
Page 17: Installation Position Requirements
45MBAAQ: Installation Instructions Installation Position Requirements Vertical installations Horizontal installations Fig. 11 —Vertical and Horizontal Installations NOTE FOR DUCT CONNECTIONS: The duct should be The duct should be insulated The duct should be a The duct should be assembled according to using a Vapor Barrier. - Page 18 45MBAAQ: Installation Instructions Installation Direction Selection The units can be installed in a vertical (down and up) and horizontal (right and left) configuration. At least 5in(127mm) Vertical up Horizontal Fig. 13 — Vertical or Horizontal NOTE: For horizontal installation a secondary drain pan (not supplied) must be installed 5” below the bottom of the air handler for proper drainage.
-
Page 19: Step 6 - Connecting The Wire And Pipes
45MBAAQ: Installation Instructions Step 6 - Connecting the Wire and Pipes Follow these steps to perform installation and installation. vertical down horizontal right 1. Open the upper cover. 2. Open the cover of the electronic control box. 3. Connect the wire according to the wiring diagram. - Page 20 45MBAAQ: Installation Instructions Step 4 Step 5 Indication of the position of each Unplug temperature sensors T1,T2,refrigerant temperature temperature sensor detection sensor from the control board. of the evaporator, confirm your T1: IDU room temp. sensor(T1) model. T2: IDU coil temp. sensor(T2)
- Page 21 45MBAAQ: Installation Instructions Step 7 Remove the evaporator and drain pan and rotate 180° Step 10 (when your equipment need to be vertical downed Reinstall T1, T2, T2A, T2B configuration). sensor plugs and electronic expansion valve (EEV) and tie up the sensor wires.
- Page 22 45MBAAQ: Installation Instructions Step 13 Step 11 Reinstall the evaporator cover plate. The evaporator is assembled in place. Step 12 Use cable ties to attach the room temperature sensor. Step 14 cable Connect the wire according to the wiring diagram.
- Page 23 45MBAAQ: Installation Instructions NOTE ON PURCHASING PIPES: Installation requires PVC pipe or other suitable material per local and national codes, which CAUTION can be obtained at your local hardware store or dealer. FOR ALL PIPES INSTALLATION WARNING Insulate all piping to prevent condensation, which could lead to water damage.
-
Page 24: Step 7 - Refrigerant Piping
45MBAAQ: Installation Instructions Step 7 - Refrigerant Piping IMPORTANT: Suction line must be insulated. • The minimum refrigerant line length between the indoor and 90° Oblique Rough Warped outdoor units is 10 ft. (3 m). • Table 13 lists the pipe sizes for the indoor unit. Refer to the outdoor unit’s installation instructions for the additional allowed piping... - Page 25 45MBAAQ: Installation Instructions NOTE: While bundling these items together, DO NOT intertwine or cross the signal cable with any other wiring. 90 ° ± 4 13. Thread this lineset through the wall to connect to the indoor unit. 14. Refer to the liquid line and gas line connection O.D. sizes in Table 13 based on the model being installed.
-
Page 26: Vertical Installations
45MBAAQ: Installation Instructions Vertical Installations REFRIGERANT PIPING CONNECTION These units operate with a negative pressure at the drain connections and a drain trap is required. Install the trap as close as possible to the unit. WARNING Ensure the top of the trap is below the connection to the drain pan to allow complete drainage of the pan. -
Page 27: Air-Handler Refrigerant Piping Connection
45MBAAQ: Installation Instructions AIR-HANDLER REFRIGERANT PIPING CONNECTION Flare Connection Insulation sleeve After the unit is installed, wrap the piping and brass fitting with foam tape. You need to wrap all the connected copper pipes, nuts and other metal parts into the insulation. - Page 28 45MBAAQ: Installation Instructions Installation of Electric Auxiliary Heat Module (Only For Heat Function Models) NOTE: Installation must be performed by an licensed contractor. Make the necessary precaution when performing the installation operation. Table 17 — Model Size Selection Table 16 — Accessories...
-
Page 29: Installation Preparation
45MBAAQ: Installation Instructions Installation Preparation Before installation, please confirm the electric auxiliary heat module and Step 3 supplied accessories are complete and free of any damage. Do not Remove the terminal block and power wires, attempt to install if damage is present. - Page 30 45MBAAQ: Installation Instructions Indoor Unit Confirmation Step 5 NOTE: Electric auxiliary heating wiring diagram packed with the accessories. If the branch circuit wire length exceeds 100 ft, Tighten the mounting screws. consult NEC 210-19a to determine maximum wire length. Use 2% voltage drop.
-
Page 31: Connection Diagram
45MBAAQ: Installation Instructions CONNECTION DIAGRAM 208/230V~60Hz Power Supply L1 L2 OUTDOOR Main Power to Signal High Power Supply Indoor Unit UNIT Voltage 208/230V 208/230V Fig. 26 — Connection Diagram (208/230V) Sizes 18K - 36K (XB3) 208/230V~60Hz Power Supply L1 L2... - Page 32 45MBAAQ: Installation Instructions Specific Wiring Methods WARNING Please refer to the wiring nameplate for the wiring method. Do not connect the power cord to the communication line, as this may damage the system. Connection method A(recommend): Connection method B: Refer to the wiring method of internal and...
-
Page 33: Wiring Diagrams
45MBAAQ: Installation Instructions WIRING DIAGRAMS Fig. 29 — Sizes 18K- 24K Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. - Page 34 45MBAAQ: Installation Instructions Fig. 30 — Sizes 30K, 36K (XB3) Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
-
Page 35: Wiring Overview
45MBAAQ: Installation Instructions Fig. 31 — Sizes 36K (XA3), 48K and 60K Wiring Overview Circuit breaker Circuit breaker Electrical heater unit power wires Fig. 32 — Wiring Overview Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. -
Page 36: Wireless Remote Controller Installation
45MBAAQ: Installation Instructions WIRELESS REMOTE CONTROLLER OPTIONAL WIRED WALL-MOUNTED INSTALLATION REMOTE CONTROL INSTALLATION The wired remote controller comes with the following items: • A set of installation instructions and owner's manuals • 3 M4X20 Screws to mount on the wall •... -
Page 37: Setting Up Airflow And Static Pressure
45MBAAQ: Installation Instructions SETTING UP AIRFLOW AND STATIC PRESSURE Accessing the INQUIRY Mode Remote Controller Service Mode Set Up CAUTION NOTE: While in the INQUIRY mode, refer to the following instructions to enter SERVICE mode for the applicable codes. Below is a list of INQUIRY modes and serviceable functions. -
Page 38: Fan Performance
45MBAAQ: Installation Instructions FAN PERFORMANCE Vertical, Horizontal Right, Horizontal Left Setting of air volume through service mode: • See Remote Controller Service Mode Set Up on page 37 to access the SERVICE mode through the INQUIRY mode. • Use the UP and DOWN arrow buttons on the remote, scroll to CODE 23-Maximum Cooling Fan Speed for Cooling fan speed changes and CODE 25-Maximum Heating Fan Speed for Heating Fan Speed changes. - Page 39 45MBAAQ: Installation Instructions COOLING Default TURBO HIGH MIDDLE COOLING Default -19~-40 TURBO HIGH MIDDLE COOLING Default +9~+20 TURBO HIGH MIDDLE HEATING Default TURBO HIGH MIDDLE HEATING Default -17~-40 TURBO HIGH MIDDLE HEATING Default +14~+20 TURBO HIGH MIDDLE Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
- Page 40 45MBAAQ: Installation Instructions 1000 0.1 0.148 0.2 External static pressure (in.w.c.) COOLING Default TURBO HIGH MIDDLE COOLING Default TURBO HIGH MIDDLE COOLING Default TURBO 1008 1028 1048 1068 1071 1071 HIGH 1014 MIDDLE COOLING Default +17~+20 TURBO 1071 1071 1071...
- Page 41 45MBAAQ: Installation Instructions 30K (CONT) HEATING Default TURBO HIGH MIDDLE HEATING Default TURBO HIGH MIDDLE HEATING Default -24~-40 TURBO 1018 1038 HIGH MIDDLE HEATING Default +14~+20 TURBO 1058 1071 1071 1071 1071 1071 1071 1071 HIGH 1016 1036 1053 1053...
- Page 42 45MBAAQ: Installation Instructions 1200 1000 0.148 External static pressure (in.w.c.) COOLING Default TURBO 1188 1168 1148 1128 1108 1088 1068 1048 1028 1008 HIGH 1082 1062 1042 1022 1002 MIDDLE COOLING Default TURBO 1188 HIGH 1082 MIDDLE COOLING Default TURBO...
- Page 43 45MBAAQ: Installation Instructions 36K CONT HEATING Default TURBO 1112 1092 1072 1052 1032 1012 HIGH 1059 1039 1019 MIDDLE HEATING Default TURBO 1112 HIGH 1059 MIDDLE HEATING Default -33~-40 TURBO 1112 HIGH 1059 MIDDLE HEATING Default TURBO 1112 1132 1152...
- Page 44 45MBAAQ: Installation Instructions 1600 1400 1200 1000 0.15 External static pressure (in.w.c.) COOLING Default TURBO 1600 1566 1532 1498 1464 1430 1396 1362 1328 1294 1260 HIGH 1471 1437 1403 1369 1335 1301 1267 1233 1199 1165 1131 MIDDLE 1282...
- Page 45 45MBAAQ: Installation Instructions 48K CONT HEATING Default TURBO 1600 1566 1532 1498 1464 1430 1396 1362 1328 1294 1260 HIGH 1382 1348 1314 1280 1246 1212 1178 1144 1110 1076 1042 MIDDLE 1141 1107 1073 1039 1005 HEATING Default TURBO...
- Page 46 45MBAAQ: Installation Instructions 1800 1600 1400 1200 1000 0.148 External static pressure (in.w.c.) COOLING Default TURBO 1806 1786 1766 1746 1726 1706 1686 1666 1646 1626 1606 HIGH 1582 1562 1542 1522 1502 1482 1462 1442 1422 1402 1382 MIDDLE...
- Page 47 45MBAAQ: Installation Instructions 60K CONT HEATING Default TURBO 1659 1639 1619 1599 1579 1559 1539 1519 1499 1479 1459 HIGH 1582 1562 1542 1522 1502 1482 1462 1442 1422 1402 1382 MIDDLE 1247 1227 1207 1187 1167 1147 1127 1107...
-
Page 48: Troubleshooting
45MBAAQ: Installation Instructions TROUBLESHOOTING Table 20 — Error Codes Display Malfunction and Protection Indication ODU Fan Speed Out of Control EC07 ODU EEPROM Parameter Error EC51 ODU Coil Temperature Sensor(T3) error EC52 ODU Ambient Temperature Sensor (T4) Error EC53 EC54 COMP. - Page 49 45MBAAQ: Installation Instructions COMMON ISSUES Table 22 — Common Issues ISSUE POSSIBLE CAUSE The Unit has a 3-minute protection feature that prevents the unit from overloading. The unit can- Unit does not turn on when pressing ON/OFF. not be restarted within three minutes of being turned off.
- Page 50 PH(xx), PL(xx), PC(xx) NOTE: If your problem persists after performing the checks and diagnostics above, turn off your unit immediately and contact an authorized service center. © 2024 Carrier. All rights reserved. Edition Date: 09/24 Catalog No: 45MBAAQ-01SI Replaces: NEW...
-
Page 51: Ductless Start-Up Checklist - Single Zone
45MBAAQ: Installation Instructions DUCTLESS START-UP CHECKLIST - Single Zone Installation Data Site Address:_______________________________________________________________________________________________________ City:________________________________________________________ State:___________ Zip Code:__________________ Installing Contractor:______________________________________________________ Contractor Contact #: ( ) _____-___________ Job Name:_______________________________________________________________ Start-up Date:_____________________________ Distributor:_______________________________________________________________ System Details UNITS MODEL NO. SERIAL NO. CONTROLLER OUTDOOR UNIT... -
Page 52: Performance Check
Outdoor Unit Error Code: Wall Controller: 24V Interface: Comments: __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ © 2024 Carrier. All rights reserved. Edition Date: 09/24 Catalog No: 45MBAAQ-01SI Replaces: NEW Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Need help?
Do you have a question about the 45MBAAQ and is the answer not in the manual?
Questions and answers