York DHMF24CSM42Q1 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.
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Additional rating information can be found at
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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 DHMF24CSM42Q1 Specifications

General

Phase	1
Frequency	60 Hz
Refrigerant	R-410A
Cooling Capacity	24000 BTU
HSPF	9.0
Voltage	208/230V
Heating Capacity	24000 BTU
Operating Temperature (Heating)	5°F to 75°F

Summary

Product Description

Key Product Features

Nomenclature Guide

Product Specifications

Air Conditioner Specifications

Detailed technical data for air conditioner models, including performance and dimensions.

Heat Pump Specifications

Detailed technical data for heat pump models, including performance and dimensions.

Performance Characteristics

Operation Characteristic Curves

Graphs illustrating compressor current vs. frequency for cooling and heating modes.

Capacity Variation Ratio

Charts showing capacity ratio changes based on outdoor temperature.

Operational Data and Sound Levels

Operation Data Table

Table of operating conditions, pressures, temperatures, and frequencies for various models.

Sound Level Data

Noise level measurements for indoor and outdoor units at different operating speeds.

Construction and Dimensions

Indoor Unit Dimensions

Visual representation and measurements for indoor unit components.

Outdoor Unit Dimensions

Visual representation and measurements for outdoor unit components.

Refrigerant System Diagrams

Cooling Only Models Diagram

Schematic showing refrigerant flow for cooling-only configurations.

Heat Pump Models Diagram

Schematic showing refrigerant flow for heat pump configurations.

24K Model Refrigerant Diagrams

Refrigerant system diagrams specific to the 24K model series.

Wiring Diagrams

Electrical Data and Wiring Schematics

Details on electrical components, symbols, and wiring for units.

Indoor and Outdoor Unit Wiring

Specific wiring configurations for 09K/12K and 18K/24K units.

Heat Pump Wiring Diagrams

Wiring schematics for outdoor heat pump units.

Control Operation Descriptions

Temperature & Current Parameters

Defines key temperature and current parameters used in system operations.

Basic Functions and Cooling Mode

Explains compressor restart delays and cooling mode operation logic.

Heating & Dehumidification Modes

Details operation logic for heating, dehumidification, and defrost modes.

Protection Functions and Faults

Overload & Discharge Temp Protection

Outlines protections against excessive tube temperature and high discharge temperature.

Communication, Module & Overload Protection

Details protections for communication faults, module issues, and overload conditions.

Temperature Sensor Faults

Lists faults related to open or short-circuited temperature sensors.

Resistance Tables

Indoor/Outdoor Temperature Sensor Resistance

Maps temperature to resistance for indoor/outdoor ambient and tube sensors.

Outdoor Discharge Temperature Sensor Resistance

Maps temperature to resistance for the outdoor discharge temperature sensor.

Indoor Unit Removal Procedure

Filter and Display Removal Steps

Steps for removing the air filter and display unit.

Panel and Louver Removal Steps

Steps for removing the front panel and horizontal louver.

Electric Box and Front Case Removal Steps

Steps for removing the electric box cover and front case.

Evaporator and Motor Removal Steps

Procedures for removing electric box, water tray, evaporator, and motor.

Blade and Cushion Rubber Removal Steps

Steps for removing cross flow blade, motor, and cushion rubber.

Outdoor Unit Removal Procedure

Top Cover, Grille, and Panel Removal Steps

Steps for removing top cover, grille, and main panel of the outdoor unit.

Guard Grille, Handle, and Side Plate Removal Steps

Steps for removing guard grille, handle, and right side plate.

Electric Box and Side Plate Removal Steps

Steps for removing electric box and left side plate.

Motor, Valve, and Gas/Liquid Valve Removal Steps

Procedures for removing motor, 4-way valve, and gas/liquid valves.

Compressor and Condenser Removal Steps

Steps for removing compressor, isolation sheet, and condenser assembly.

Accessories Catalog

Other and Mounting Accessories

Lists of additional accessories like remote controls, filters, and mounting hardware.

Linesets and Fittings

Catalog of various lineset configurations and fittings for installation.