Carrier 40MBAB Installation Instructions Manual
Carrier 40MBAB Installation Instructions Manual

Carrier 40MBAB Installation Instructions Manual

Air handler unit ductless system
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40MBAB
Air Handler Unit Ductless System
Sizes 18K to 60K
Fig. 1 -Air Handler
NOTE: Read the entire instruction manual before starting the
installation.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
HEATER PACKAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION REQUIREMENTS. . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Step 1 - Check Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Step 2 - Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Step 3 - Mount Electric Heater (Optional) . . . . . . . . . . . . . . . . . . . . 10
Step 4 - Installing Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Step 5 - Condensate Drains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Step 6 - Refrigerant Piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Step 7 - Evacuate Coil and Tubing System . . . . . . . . . . . . . . . . . . . 18
Step 8 - Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
INDOOR UNIT WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
WIRING REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
ELECTRICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
TEST RUN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
SYSTEM CHECKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
START-UP PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Scan to access French documentation:
Installation Instructions
A220687
PAGE
Specifications subject to change without notice.

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance, or
use can cause explosion, fire, electrical shock, or other conditions
which may cause death, personal injury or property damage. Consult a
qualified installer, service agency, or your distributor or branch for
information or assistance. The qualified installer or agency must use
factory-authorized kits or accessories when modifying this product.
Refer to the individual instructions packaged with kits or accessories
when installing.
Follow all safety codes. Wear safety glasses, protective clothing and
work gloves. Have a fire extinguisher available. Read these
instructions thoroughly and follow all warnings or cautions included
in the literature and attached to the unit. Consult the local building
codes and the current editions of the National Electrical Code (NEC)
NFPA 70.
In Canada, refer to the current editions of the Canadian Electrical
Code CSA C22.2 No. 60335-2-40. Recognize safety information.
This is the safety-alert symbol
unit and in instruction manuals, be of the potential for personal injury.
Understand the signal words DANGER, WARNING, and
CAUTION. 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.
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or
death. Before installing or servicing the unit, always turn off all
power to the unit. There may be more than one disconnect switch.
Turn off accessory heater power if applicable. Lock out and tag the
switch with a suitable warning label.
CAUTION
CUT HAZARD
Failure to follow this caution may result in personal injury. Sheet
metal parts may have sharp edges or burrs. Use care and wear
appropriate protective clothing and gloves when handling parts.
. When you see this symbol on the

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Summary of Contents for Carrier 40MBAB

  • Page 1: Table Of Contents

    40MBAB Air Handler Unit Ductless System Sizes 18K to 60K Installation Instructions SAFETY CONSIDERATIONS Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause death, personal injury or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance.
  • Page 2: Introduction

    40MBAB: Installation Instructions INTRODUCTION ACCESSORIES The system is shipped with the following accessories (see Table 2). Use The Air Handler models are R-410A Fan Coils designed for all of the installation parts and accessories to install the system. Improper installation flexibility allowing multi-position installation up-flow, installation may result in water leakage, electrical shock and fire, or cause down-flow, horizontal right and horizontal left.
  • Page 3: Dimensions

    40MBAB: Installation Instructions DIMENSIONS Duct Dimensions Duct Dimensions A220787 Fig. 4 —Dimensions Table 3 — Dimensions Dimensions Model A (Height) B (Depth) C (Width) 45in 21in 17.5in 15.75in 10.25in 23in 18K-24K (1143mm) (534mm) (445mm) (400mm) (260mm) (585mm) 49in 21in 21in 19.31in...
  • Page 4: Installation Requirements

    40MBAB: Installation Instructions INSTALLATION REQUIREMENTS Review the following information before installing the unit: NOTE: DO NOT install the indoor or outdoor units in a location with special environmental conditions. For those applications, contact • Do not install the indoor units near a direct source of heat such as your Ductless representative.
  • Page 5: Step 2 - Mount Unit

    40MBAB: Installation Instructions Step 2 - Mount Unit A. Upflow or Horizontal-Left Installation The unit can stand or lie on the floor, or hang from a ceiling or a wall. The units can be installed in a vertical Upflow or horizontal (left) Allow space for wiring, piping, and servicing the unit.
  • Page 6 40MBAB: Installation Instructions B. Downflow or Horizontal-Right Installation For the Horizontal Right installation and the Vertical Downflow 3. Remove the evaporator cover plate. installation, the direction of the evaporator should be changed and the drain pan should be removed first.
  • Page 7 40MBAB: Installation Instructions 5. Remove the T1, T2 temperature sensor wire ties. 7. Adjust the mounting parts positions. A220779 Fig. 17 — Adjust the Mounting Parts Position 8. Reinstall the evaporator and drain pan. A220776 Fig. 15 — Remove the T1, T2 Temperature Sensor 6.
  • Page 8 40MBAB: Installation Instructions 9. Reinstall the T1, T2 temperature sensor plug and tie up the 10. The evaporator is assembled in place. temperature sensor wires. NOTE: The wire body needs to pass through the wire groove from the water receiving tray and be placed firmly on the hook of the water receiving tray hook.
  • Page 9: Vertical Downflow

    40MBAB: Installation Instructions VERTICAL DOWNFLOW 13. Reassemble the upper cover. Figure is an illustration for the air handler’s vertical downflow. A220784 Fig. 22 —Reassemble the upper cover 14. Reinstall the filter and the filter cover plate. A220788 Fig. 24 — Downflow Illustration A220789 Fig.
  • Page 10: Step 3 - Mount Electric Heater (Optional)

    40MBAB: Installation Instructions Step 3 - Mount Electric Heater (Optional) INSTALLATION REQUIREMENTS NOTE: Installation of Auxiliary Electric Heat Module should be Table 6 — Accessories completed before installing the discharge ductwork to insure proper alignment of the inside support brackets.
  • Page 11 40MBAB: Installation Instructions 2. Remove the terminal block and power cord. 6. Tighten the screws. 3. Loosen the screws. 4. Remove the electric auxiliary heating cover. A220795 Fig. 29 — Tighten the Screws 7. Wiring according to the wiring template.
  • Page 12 40MBAB: Installation Instructions ELECTRIC AUXILIARY HEATING WIRING DIAGRAM A220797 Fig. 31 — Electric Auxiliary Heating Wiring Diagram Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 13 40MBAB: Installation Instructions ELECTRIC AUXILIARY HEATING WIRING DIAGRAM (CONT) A220798 Fig. 32 —Electric Auxiliary Heating Wiring Diagram Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 14: Step 4 - Installing Ductwork

    40MBAB: Installation Instructions DUCTWORK ACOUSTICAL TREATMENT Table 8 — Specifications Metal duct systems that do not have a 90 degree elbow and 10ft (3m) of No. of No. of No. of main duct to first branch takeoff may require internal acoustical No.
  • Page 15: Step 5 - Condensate Drains

    40MBAB: Installation Instructions Step 5 - Condensate Drains The drainpipe is used to drain water away from the unit. Improper installation may cause unit and property damage. CAUTION A220801 • Insulate all piping to prevent condensation, which could lead to Fig.
  • Page 16: Step 6 - Refrigerant Piping

    40MBAB: Installation Instructions Step 6 - Refrigerant Piping IMPORTANT: Both refrigerant lines must be insulated separately. • The minimum refrigerant line length between the indoor and 90° Oblique Rough Warped outdoor units is 10 ft. (3 m). • Table 9 lists the pipe sizes for the indoor unit. Refer to the outdoor unit’s installation instructions for the additional allowed piping...
  • Page 17 40MBAB: Installation Instructions NOTE: Use both a backup wrench and a torque wrench when connecting or disconnecting pipes to or from the unit. Flare block Pipe A220808 Fig. 41 —Flare Block f. Place the flaring tool onto the form. g. Turn the handle of the flaring tool clockwise until the pipe is fully A220813 flared.
  • Page 18: Step 7 - Evacuate Coil And Tubing System

    40MBAB: Installation Instructions Step 7 - Evacuate Coil and Tubing System Evacuation Evacuation of the system removes air or nitrogen (non-condensables) as well CAUTION as moisture. A proper vacuum will assure a tight, dry system before charging with refrigerant. The two methods used to evacuate a system are the deep vacuum method and the triple vacuum method.
  • Page 19: Step 8 - Electrical Connections

    40MBAB: Installation Instructions Step 8 - Electrical Connections Before proceeding with electrical connections, make certain that the supply voltage, frequency, phase, and ampacity are as specified on the unit rating plate. Review the unit wiring label for proper field high and low voltage wiring.
  • Page 20: Wiring Requirements

    40MBAB: Installation Instructions SIZES 36-60 (LIGHT-COMMERCIAL MODELS) Circuit Breaker RECOMMENDED CONNECTION METHOD FOR POWER AND COMMUNICATION WIRING Electrical heater unit power wires Power and Communication Wiring: The main power is supplied to the outdoor unit. The field supplied power wiring from the outdoor unit to the...
  • Page 21: Electrical Data

    40MBAB: Installation Instructions ELECTRICAL DATA Table 13 — Electrical Data INDOOR FAN MAX FUSE CB AMP UNIT SIZE V-PH-HZ 0.33 0.33 0.50 Refer to outdoor unit installation instructions – 208-230/1/60 0.50 Indoor unit powered by the outdoor unit 0.75 286.5 CONNECTION DIAGRAMS AND CONTROL METHODS The air handler fan coil unit can be controlled mainly through the following methods.
  • Page 22: Alarm Warning

    40MBAB: Installation Instructions Fig. 57 —Optional Function Wiring for 36K-60K Residential Units L1(1) L2(2) S(3) A220825 Fig. 55 —Control and Power Terminal on Indoor Unit (Sizes 18K, 24K, 30K, 36K) Non-Light Commercial Models A220826 Fig. 56 —Control and Power Terminal on Indoor Unit...
  • Page 23: Control Logic

    40MBAB: Installation Instructions Humidification Control Wiring 54-1 DIP Switch Disconnect then short-circuit to achieve partition, control or dehumidification. Dehumidification control requires a indirect humidifier at DH and R. Set 54-1 to OFF. When the humidity rises and exceeds the set value of the humidifier, the...
  • Page 24: Dip Switch Definitions

    40MBAB: Installation Instructions DIP SWITCH DEFINITIONS •SW2-1: This dial code can control the temperature difference when the electric heating is turned on. OFF: 4°F(2°C), default; ON: 2°F(1°C), 3-level temperature setting, consistent with user thermostat setting. Note: When E/AUX controls electric heating, there is no temperature difference, and it starts directly.
  • Page 25 40MBAB: Installation Instructions Table 16 — Turbo, High, Medium, Low Air Volume Parameters The PWM Static Air volume The PWM Static Air volume The PWM Static Air volume The PWM Static Air volume The PWM Static Air volume The PWM...
  • Page 26: Test Run

    40MBAB: Installation Instructions TEST RUN SYSTEM CHECKS 1. Conceal the tubing where possible. BEFORE THE TEST RUN 2. Ensure the drain tube slopes downward along its entire length. A test run must be performed after the entire system has been completely 3.
  • Page 27: Troubleshooting

    40MBAB: Installation Instructions TROUBLESHOOTING For ease of service, the systems are equipped with diagnostic code display LEDs on some outdoor units. The outdoor diagnostic display consists of two LEDs (red and green) on the outdoor unit board and is limited to a few errors. The indoor diagnostic display is a digital readout on the display panel. If possible, always check the diagnostic codes displayed on the indoor unit first before consulting a service technician.
  • Page 28 40MBAB: Installation Instructions © 2022 Carrier. All rights reserved. Edition Date: 06/22 Catalog No: 40MBAB-02SI Replaces: 40MBAB-01SI Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

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