Payne 45MBFA Floor Console Unit Ductless System

Product Data

The Payne 45MBFA series ductless system is a matched combination of an outdoor condensing unit and an indoor fan coil unit connected by refrigerant tubing and wires. The fan coil can be mounted on the floor or against the wall, offering flexible design solutions for various space requirements, including additions, special space needs, or historical renovations. It serves as an ideal complement to ducted systems where ductwork is impractical or expensive.

The compact indoor fan coil units are attractively styled, unobtrusive, and designed to blend with most room decors. Advanced system components ensure reliable cooling performance with low sound levels. The ductless systems are quiet, eliminating the noise associated with indoor compressors and ductwork. For security, the outdoor and indoor units are connected only by refrigerant piping and wiring, preventing intruders from crawling through ductwork. Outdoor units can be positioned close to an outside wall for protection from weather and vandalism.

Servicing and maintenance are simplified with easy access to the control compartment and draw-thru coil design for quick cleaning. Indoor units feature cleanable filters, self-diagnostics, and a refrigerant leak detection system.

Industry Leading Features / Benefits

• Budget, Energy Savings, and Comfort: A perfect balance for efficient operation and comfort.
• Flexible Installation: Floor or wall-mounted options for various space needs.
• Low Sound Levels: Whisper-quiet operation with no indoor compressors.
• Secure Operation: Limited connections prevent ductwork intrusion and protect outdoor units.
• Simple Servicing and Maintenance: Easy access for cleaning and diagnostics.

Elegant and Compact Design

The unit features flowing lines and an unobtrusive design that fits easily into various interior styles. Its reduced width saves space.

Economical Operation

The ductless system allows individual room heating or cooling, eliminating the need for large supply-air fans or chilled water pumps for underutilized spaces. Energy is saved by moving air only within the required space.

Easy-to-Use Controls

Microprocessor-based controls provide optimal comfort and efficiency. A user-friendly wireless remote control serves as the interface.

Accessories

Accessories like condensate pumps enhance installation flexibility.

Optional Wired Controller

An optional wired controller is available for system operation.

Agency Listings

Systems are listed with AHRI (Air Conditioning, Heating & Refrigeration Institute) and ETL.

Humidity Control

The system efficiently dehumidifies the air to maintain comfortable indoor humidity levels.

Built-in Reliability

Ductless system indoor and outdoor units are designed for years of trouble-free operation. Features include protection against freeze-up, high evaporator temperatures, and a three-minute time delay for compressor startup.

Individual Room Comfort

Each space can be controlled individually. The air sweep feature ensures optimal room air mixing, eliminating hot and cold spots for enhanced occupant comfort. Heat pumps provide year-round comfort.

Model Number Nomenclature

The model number indicates key features such as unit type, system type, capacity, and variation. For example:

• 45: FAN COIL UNIT
• M: MODEL
• BFA: CONSOLE
• Q: HEAT PUMP
• 09/12/16: Capacity (9K, 12K, 16K)
• X: Indoor Unit
• A: VARIATION (STANDARD)
• 3: VOLTAGE (208/230V-1-60)

Standard Features and Accessories

Legend: S - Standard, A - Accessory

Dimensions and Clearances

Diagrams illustrate the unit dimensions and required clearances for proper installation and airflow. Key dimensions include height, width, and depth, with specific clearance requirements noted.

Specifications

Application Data

Unit Selection

Select equipment to either match or is slightly less than the anticipated peak load. This provides better humidity control, fewer unit cycles, and less part-load operation. For units used in spaces with high sensible loads, base equipment selection on unit sensible load, not on total anticipated load. Adjust for anticipated room wet bulb temperature to avoid undersizing equipment.

Unit Mounting (Indoor)

Refer to the unit's installation instructions for further details. Units should be level in all planes. Provide adequate clearance for airflow. Select a location that provides the best air circulation for the room. Units should be positioned on the floor, against the wall for best air circulation. Avoid obstructing the return and discharge with furniture or curtains. Use an outside wall if available for easier piping. Position the unit to face the normal location of room occupants.

Mounting Template: Refer to the unit's installation instructions for details on marking the location of wiring and refrigeration line holes.

Support: Adequate support must be provided for the fan coil unit. Refer to "DIMENSIONS AND CLEARANCES" and "SPECIFICATIONS" for unit weight and mounting bracket locations.

NOTE: Reference the product installation instructions for more information.

Drain Connections

Install drains according to local plumbing codes. An accessory condensate pump may be required if gravity drainage is inadequate. Drain size is 5/8 in (16mm).

Refrigerant Lines

General Refrigerant Line Sizing:

1. Outdoor units are shipped with a full charge of R-454B refrigerant.
2. Refrigerant lines should not be buried. If burial is necessary, no more than 36 inches (914 mm) should be buried. A minimum 6-inch (152 mm) vertical rise to the service valves is required to prevent refrigerant migration.
3. Insulate lines with a minimum of 1/2-inch (12.7 mm) thick closed-cell insulation for long-line applications.
4. Isolate interconnecting tubing from the building structure to prevent vibration or noise transmission.

Wiring

All wires must be sized per NEC (National Electrical Code) or CEC (Canadian Electrical Code) and local codes. Use the Electrical Data table for minimum circuit amps (MCA) and maximum overcurrent protection (MOCP) to size wires and disconnect fuses/breakers correctly.

Recommended Connection Method for Power and Communication Wiring:

The main power is supplied to the outdoor unit. The field supplies 14/3 stranded wire with ground (600V insulation rating) for power/communication wiring between the outdoor and indoor units. This consists of four wires: two for AC power, one for communication (S), and one ground wire. Wiring between indoor and outdoor units is polarity sensitive. BX wire is not recommended. If communication issues arise, a 14/2 stranded shielded wire can be used for L2 and (S), landing the shield to ground at the outdoor unit only.

EQUIPMENT DAMAGE HAZARD: Failure to follow these cautions may result in equipment damage or improper operation. Wires should be sized based on NEC and local codes.

Ensure all wiring is tightly connected to prevent overheating or unit malfunction. No wire should touch refrigerant tubing, the compressor, or moving parts. Disconnecting means must be provided, located within sight, and readily accessible.

Control System

The unit is equipped with a microprocessor control system for safety and optimal comfort. Thermistors in the fan coil air inlet and indoor coil monitor system operation. Heat pump units also have a thermistor on the outdoor coil. These sensors maintain the unit within acceptable parameters and control the operating mode.

Wireless Remote Control

A wireless remote control (RG10L5) is supplied for system operation. It allows control of various functions including mode, temperature, fan speed, and swing. Multiple units can be controlled by a single remote if they are within range.

Wired Remote Control (Optional)

An optional wired remote controller is available for system operation. The kit includes the controller and a connecting cable. The controller displays temperature in °F or °C.

Sound Pressure

SOUND PRESSURE TESTING METHOD: A diagram illustrates the testing method using a microphone positioned at a specific distance and height.

Air Flow Data

NC Curves

Noise Criteria (NC) curves are provided for sizes 9, 12, and 16, illustrating octave band sound pressure levels across different frequencies for various fan speeds (High, Medium, Low).

Air Velocity and Temperature Distributions

Diagrams show cooling and heating airflow velocity distributions and temperature distributions for the unit, illustrating air movement patterns and temperature gradients within the conditioned space.

Wiring Diagram

A detailed wiring diagram for the indoor unit is provided, showing connections for sensors, main board, fan motors, swing motors, and communication interfaces. It also includes wiring details for the outdoor unit and connections for programmable wired controllers.

Refrigerant System Diagram

A diagram illustrates the refrigerant system, showing the indoor heat exchanger, distributor, and connections for refrigerant gas and liquid pipes, along with thermistor locations for temperature sensing.

Display Function

New Console Type

The console display indicates various functions and status indicators, including ECO mode, temperature values, timer settings, defrost, and active clean status. Error codes are displayed for malfunctions.

Safety Features

• Compressor three-minute delay at restart: Prevents rapid cycling upon startup or subsequent restarts.
• Automatic shutoff based on discharge temperature: Protects the compressor if discharge temperature exceeds a limit.
• Inverter module protection: Automatic shutoff based on unit's current, voltage, and temperature.
• Indoor fan delayed operation: Louver and fan operate after a set time or when the louver is in place. Anti-cold wind function regulates fan speed in heating mode.
• Compressor preheating: Activated when outdoor air temperature is low.
• Sensor redundancy and automatic shutoff: Allows continued operation with one malfunctioning sensor, but ceases operation if more than one sensor fails.

Basic Functions

NOTE: CDIFTEMP, HDIFTEMP2, etc., are EEPROM parameters.

FAN MODE

In FAN MODE, the outdoor fan and compressor stop. Temperature control is disabled. The indoor fan speed can be set from 1% to 100% or auto. Louver operations are the same as in COOLING mode. AUTO fan operates as in COOLING mode with a temperature set at 75°F (24°C).

COOL MODE

Indoor Fan Control:

1. In COOLING mode, the indoor fan operates continuously. Fan speed can be set from 1%-100%, or low, medium, high, and auto.
2. Auto fan action in the COOLING mode (Descent curve): Fan speed decreases as the temperature difference (T1-Tsc) decreases.
3. Auto fan action in the COOLING mode (Rise curve): Fan speed increases as the temperature difference (T1-Tsc) increases.

CONDENSER TEMPERATURE PROTECTION: The compressor ceases operation when the condenser temperature exceeds a configured value.

EVAPORATOR TEMPERATURE PROTECTION: The compressor ceases operation when the evaporator temperature exceeds a configured value.

Heating Mode (Heat Pump Units)

Indoor Fan Control:

1. In HEATING mode, the indoor fan operates continuously. Fan speed can be set from 1%-100% or auto.
2. Anti-cold air function: Adjusts fan speed based on the temperature difference (T2) to prevent cold air discharge.
3. Auto fan action in the HEATING mode (Rise curve): Fan speed reduces as the temperature difference (T1-Tsc) increases.
4. Auto fan action in the HEATING mode (Descent curve): Fan speed increases as the temperature difference (T1-Tsc) decreases.

AUTO-MODE

In AUTO-MODE, the unit selects COOLING, HEATING, or FAN-ONLY mode based on T1, Ts, outdoor ambient temperature (T4), and relative humidity (φ).

Guide Specifications

Part 1 - GENERAL

1.01 System Description

Indoor console, direct-expansion fan coils matched with cooling-only or heat pump outdoor units. The unit has automatic restart after power failure, a timer function for auto start/stop, temperature-sensing controls, indoor coil freeze protection, and wireless infrared remote control for set points and operating conditions. Automatic air sweep control and dehumidification mode are standard. Diagnostic functions warn of possible malfunctions.

1.02 Agency Listings

Unit is rated per AHRI Standards 210/240 and listed in the AHRI directory as a matched system.

1.03 Delivery, Storage, And Handling

Units stored and handled per manufacturer's recommendations.

1.04 Warranty (For Inclusion By Specifying Engineer)

Part 2 - PRODUCTS

2.01 Equipment

A. General:

Indoor, direct-expansion, floor-mounted fan coil unit with cooling/heating coil, fan, motor, piping connectors, electrical controls, microprocessor control system, and integral temperature sensing. Includes an integral mounting bracket and hardware.

B. Unit Cabinet:

Attractively styled, high-impact polystyrene cabinet with insulated discharge and inlet grilles for improved thermal and acoustic performance.

C. Fans:

Tangential, direct-drive blower type with air intake in the center and discharge at the top and bottom front. Automatic, motor-driven vertical air sweep is standard and user selectable. Horizontal air direction is manually set.

D. Coil:

Copper tube with aluminum fins and galvanized steel tube sheets. Fins are bonded by mechanical expansion. Specially golden hydrophilic pre-coated for enhanced wet-ability. A drip pan with a drain connection is located under the coil.

E. Motor:

Open drip-proof, permanently lubricated ball bearing motor with inherent overload protection. The fan motor has 4 speeds.

F. Controls:

Microprocessor-based control system manages space temperature, determines optimum fan speed, and performs self-diagnostics. Temperature control ranges from 62°F to 86°F (17°C to 30°C) in 1°F or 1°C increments. Features 46°F Heating Mode (Heating Setback). The wireless remote controller can act as the temperature sensing location.

G. Filters:

Unit includes a filter track with factory-supplied cleanable filters.

H. Electrical Requirements:

Indoor fan motor operates on 208-230V. Power is supplied from the outdoor unit.

I. Operating Characteristics:

The 45MBFA system meets minimum SEER and HSPF at AHRI conditions, as listed in the specifications table.

J. Refrigerant Lines:

Refrigerant lines can be oriented for left, right, or back connection and must be insulated.

K. Refrigerant Leak Detection and Mitigation:

The system includes a Refrigerant Leak Protection System.