York DHMF24NWM42Q1 User Manual

LX SERIES
DUCTLESS SINGLE-SPLIT
AIR CONDITIONERS AND HEAT PUMPS
16 SEER – 1 PHASE
3/4 THRU 2 NOMINAL TONS
MODELS: DCMF/DHMF
Due to continuous product improvement, specifications
are subject to change without notice.
Visit us on the web at
www.upgnet.com
Additional rating information can be found at
www.ahridirectory.org
WARRANTY SUMMARY*
Standard 2-Years limited parts warranty.
Standard 6-Years limited compressor warranty.
TECHNICAL
GUIDE
TECHNICAL
GUIDE
FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE
923178-UTG-B-0114
DESCRIPTION
The Single-Split Series are ductless climate systems. They are
designed with a matching indoor unit for optimum performance and effi-
ciency. These climate systems are supported with accessories and doc-
uments to serve specific functions.
FEATURES
Variable Frequency Rotary Compressor - Twin rotary inverter compressor
on all models features high efficiency operation that modulates down to 15
Hz and as high as 120 Hz for reduced vibration and quiet operation. Brush-
less DC motor uses powerful Neodymium magnets that are approximately
15-20 times stronger than ferrite magnets used in conventional AC compres-
sors. The DC Inverter Control provides continuous operation, while adjusting
capacity according to room temperature. The accurate sensing of cooling or
heating loads prevents frequent changes in capacity and ensures efficient,
economical operation.
Low Ambient Cooling Operation Down to 5 °F - This feature allows for a
space to be air-conditioned even in outdoor temperatures as low as 5 °F.
This cooling ability is important when dealing with server equipment rooms,
surveillance mechanical rooms, restaurant kitchens, fitness centers, and
more.
Load Variation Management System - The outdoor coil thermistor continu-
ously monitors the temperature and communicates with the microprocessor.
Depending on the temperature measured, the compressor will be allowed to
increase the frequency if needed to meet the load or reduce frequency as
the load is reduced.
High Pressure Discharge Temperature - The compressor discharge line
thermistor continuously monitors the temperature and communicates with
the microprocessor. Depending on the temperature measured, the compres-
sor will be allowed to increase the frequency to meet the load or is forced to
run at the current or reduced frequency. If the temperature gets excessively
high, the compressor will be de-energized.
Defrost Control (Heat Pump Models) - Defrost cycle is automatically
enabled if there is a build-up of frost on the outdoor coil. Outdoor fan and
indoor blower operation is terminated during the defrost cycle. H1 is dis-
played on the indoor unit panel on the front cover during a defrost cycle.
Reversing Valve (Heat Pump Models) - 4-way interchange reversing valve
effects a rapid change in direction of refrigerant flow resulting in quick
changeover from cooling to heating and vice versa. Valve operates on sys-
tem pressure differential between outdoor unit and indoor unit.
R-410A Refrigerant - Unit is pre-charged with R410A refrigerant that uses
PVE refrigerant oil. Polyvinyl ether (PVE) is an innovative refrigerant oil spe-
cially formulated for hydrofluorocarbon (HFC) refrigeration systems. In addi-
tion to providing lubricating properties, it also has a number of other applied
advantages that help to increase the reliability of the refrigeration systems
where it is applied.
Refrigerant Line Connections, Service Valve - Outdoor units are designed
with easy service and maintenance in mind. Maintenance points are located
behind easy-access panels, to make installation and service a breeze for a
trained technician. Flare connection lines are located on side of unit cabinet.
Fully serviceable brass service valve prevents corrosion and provide access
to refrigerant system. Shut-off valve that can be fully shut off while 2-way
suction/vapor valve (with service port) may be front seated to manage refrig-
erant charge while servicing system.
Air Deflection Louvers - Horizontal louvers default to the cooling or heating
position when the unit is operating. Horizontal louvers can be set to a preset
oscillating range or fixed position from the wireless remote control. Full oscil-
lating is the default setting when button is pushed. Vertical louvers can be
manually adjusted to direct the airflow for optimal comfort.
Indoor Coil Freeze Protection - The indoor coil thermistor monitors the coil
temperature continuously. Any time the coil temperature drops below 30°F,
the compressor and the outdoor fan (30 seconds later) will be switched off
until the coil temperature rises above 43°F and the compressor has been off
for a minimum of 3 minutes.
I FEEL Function - When I FEEL is activated, the system will satisfy the cool-
ing or heating temperature setpoint where the remote control is located.
When I FEEL is deactivated, the system will satisfy the cooling or heating
temperature setpoint where the indoor unit is located. This feature provides
homeowners with optimum comfort whether they are near or far from the
indoor unit.
Hot Heat Pump (cold air prevention) - In heating mode, the indoor fan will
be delayed from 1 to 3 minutes to allow refrigerant to warm up and avoid
cold blow. This may occur during:
• Initial start-up of a heating cycle
• Immediately after completion of an Auto mode operation
• Heating under extremely low indoor temperatures

York DHMF24NWM42Q1 Specifications

General

Brand	York
Model	DHMF24NWM42Q1
Category	Air Conditioner
Language	English

Summary

Product Overview and Features

Description

Summarizes the product series and its intended applications.

Key Features

Details the operational capabilities, technologies, and performance aspects of the units.

Product Nomenclature

Model Code Breakdown

Explains the meaning and significance of each character in the product model number.

Air Conditioner Specifications

AC General Specifications

Covers rated voltage, frequency, capacity, SEER, airflow, and EER for AC units.

AC Indoor Unit Specifications

Details indoor unit dimensions, fan specifications, and performance metrics.

Air Conditioner Outdoor Unit Specifications

AC Outdoor Unit General Specs

Covers compressor type, operating temperature ranges, condenser, and refrigerant specs.

AC Outdoor Unit Performance

Details airflow, noise levels, refrigerant charge, and connection pipe data.

Heat Pump Specifications

HP General Specifications

Covers rated voltage, capacity, SEER/HSPF, airflow, and EER for heat pump units.

Heat Pump Outdoor Unit Specifications

HP Outdoor Unit Performance

Details airflow, noise levels, refrigerant charge, and connection pipe data for outdoor heat pump units.

Product Operation Characteristic Curves

Cooling and Heating Current Curves

Illustrates the relationship between compressor frequency and current draw.

Product Capacity Variation Ratios

Cooling Capacity vs. Outdoor Temp

Illustrates how cooling capacity changes with varying outdoor temperatures.

Heating Capacity vs. Outdoor Temp

Illustrates how heating capacity changes with varying outdoor temperatures.

Operation Data and Sound Levels

Cooling and Heating Operation Data

Provides key operational parameters under different temperature and pressure conditions.

Sound Level Data

Details the noise levels produced by indoor and outdoor units during operation.

Construction Views and Dimensions

Indoor Unit Dimensions and Weights

Provides physical dimensions and unit gross weights for the indoor units.

Outdoor Unit Dimensions and Weights

Provides physical dimensions and unit gross weights for the outdoor units.

Refrigerant System Diagrams

Cooling Only Model Diagrams

Illustrates the refrigerant flow path for cooling-only models.

Heat Pump Model Diagrams

Illustrates the refrigerant flow path for heat pump models.

24K Refrigerant System Diagrams

24K Cooling Only Diagrams

Shows refrigerant flow diagrams specific to 24K cooling-only units.

24K Heat Pump Diagrams

Shows refrigerant flow diagrams specific to 24K heat pump units.

Wiring Diagrams

Electrical Data and Symbols

Explains wire colors, electrical symbols, and component identification.

Indoor and Outdoor Unit Wiring

Details the electrical connections and schematics for both indoor and outdoor units.

Model-Specific Wiring Diagrams

09K/12K Indoor Unit Wiring

Wiring schematic specific to the 09K and 12K indoor unit models.

18K/24K Outdoor Unit Wiring

Wiring schematic specific to the 18K and 24K outdoor unit models.

Wiring Diagrams for Other Configurations

18K/24K Indoor Unit Wiring

Wiring schematic specific to the 18K and 24K indoor unit models.

09K/12K Outdoor Heat Pump Wiring

Wiring schematic specific to the 09K and 12K outdoor heat pump models.

Heat Pump Wiring Diagrams

09K/12K Indoor Heat Pump Wiring

Wiring schematic specific to the 09K and 12K indoor heat pump units.

18K/24K Outdoor Heat Pump Wiring

Wiring schematic specific to the 18K and 24K outdoor heat pump units.

Control Operation Details

Temperature and Current Parameters

Defines key parameters like preset, ambient, and coil temperatures used for operation.

Basic Operational Functions

Explains fundamental operational rules, such as compressor restart delay and minimum run times.

Cooling Mode Operation

Describes how cooling mode is activated, controlled, and maintained.

Cooling Mode Protection

Details safety protections implemented during cooling operation, including antifreeze and current limits.

Mode Operations and Protections

Dehumidification and Heating Modes

Explains operation and settings for dehumidification and heating modes, including cold air prevention.

Defrost Mode Operation

Details the conditions, process, and sequence of events for defrost cycles in heating mode.

AUTO Mode Operation

Describes how the system automatically selects between cooling, heating, and fan modes based on temperature.

System Protection and Fault Handling

Common Protection Functions

Covers overload, discharge temperature, communication, module, and voltage protections.

Temperature Sensor Faults

Outlines faults detected from open or short-circuited temperature sensors.

Resistance Tables for Ambient Sensors

Ambient Temperature Sensor Resistance Data

Provides resistance values (kΩ) for ambient temperature sensors at various temperatures (°F).

Resistance Tables for Tube Sensors

Tube Temperature Sensor Resistance Data

Provides resistance values (kΩ) for tube temperature sensors at various temperatures (°F).

Resistance Tables for Discharge Sensor

Outdoor Discharge Temperature Sensor Data

Provides resistance values (kΩ) for the outdoor discharge temperature sensor at various temperatures (°F).

Indoor Unit Removal Procedure

Initial Disassembly Steps

Covers initial steps like opening the panel, removing filters, and the display unit.

Indoor Unit Disassembly Steps

Panel and Louvre Removal

Details how to remove the main panel and the horizontal louvers.

Electric Box Cover Removal

Instructions for removing the top cover of the electric box.

Indoor Unit Component Removal

Front Case and Earthing Wire Removal

Steps for removing the front case and the earthing wire.

Electric Box Cover Removal

Instructions for removing the cover of the electric box.

Indoor Unit Component Removal (Continued)

Temperature Sensor and Electric Box Removal

Procedures for removing the indoor temperature sensor and the main electric box.

Water Tray and Pipe Separation

Steps to detach the water tray and disconnect the refrigerant pipes.

Indoor Unit Component Removal (Continued)

Pipe-Stopping Plate and Damping Board Removal

Steps for removing internal mounting plates like the pipe-stopping plate and damping board.

Evaporator and Motor Fixing Plate Removal

Procedures for removing the evaporator assembly and the motor fixing plate.

Indoor Unit Component Removal (Continued)

Cross Flow Blade and Motor Removal

Steps for removing the cross flow blade and the fan motor assembly.

Cushion Rubber Removal

Details on removing the cushion rubber components from the unit.

Outdoor Unit Removal Procedure

Initial Outdoor Unit Disassembly

Covers removal of the top cover, front side plate, and grille.

Outdoor Unit Component Removal

Grille, Handle, and Side Plate Removal

Steps for removing external panels like the guard grille, handle, and right side plate.

Electric Box Cover Removal

Instructions for accessing the outdoor unit's main electrical compartment.

Outdoor Unit Component Removal (Continued)

Electric Box and Side Plate Removal

Procedures for removing the electric box and the left side plate.

Axial Flow Blade Removal

Steps for removing the outdoor fan's axial flow blade.

Outdoor Unit Component Removal (Continued)

Motor and Motor Support Removal

Procedures for removing the fan motor and its support assembly.

Valve Removal Procedures

Details on removing the 4-way valve, gas valve, and liquid valve.

Outdoor Unit Component Removal (Continued)

Compressor and Isolation Sheet Removal

Steps for removing the compressor, isolation sheet, and support plate.

Chassis and Condenser Removal

Procedures for separating the main chassis from the condenser unit.

Accessories and Parts List

Other Accessories

Lists miscellaneous accessories such as remote controls and filters.

Mounting Accessories

Lists accessories used for unit installation and mounting, including pads and brackets.

Linesets and Fittings

Lists various refrigerant line sets, connectors, and fittings for installation.