Mitsubishi Electric CITY MULTI PDFY-P24NMU-E User Manual

CITY MULTI
DATA U5
SYSTEM DESIGN H SERIES
SYSTEM DESIGN H SERIES
1. Electrical work.................................................................................................................................................. 4 - 68
1-1.General cautions ....................................................................................................................................... 4 - 68
1-2.Power supply for Indoor unit and Outdoor unit .......................................................................................... 4 - 69
1-3.Power cable specifications ........................................................................................................................ 4 - 71
1-4.Power supply examples............................................................................................................................. 4 - 72
2. M-NET control.................................................................................................................................................. 4 - 74
2-1.Transmission cable length limitation.......................................................................................................... 4 - 74
2-2.Transmission cable specifications............................................................................................................. 4 - 75
2-3.System configuration restrictions............................................................................................................... 4 - 76
2-4.Address setting.......................................................................................................................................... 4 - 79
3. Piping Design................................................................................................................................................... 4 - 90
3-1.R410A Piping material............................................................................................................................... 4 - 90
3-2.Piping Design ............................................................................................................................................ 4 - 91
3-3.Refrigerant charging calculation................................................................................................................ 4 - 93
4. Outdoor Installation.......................................................................................................................................... 4 - 94
4-1.Requirement on installation site ................................................................................................................ 4 - 94
4-2.Spacing...................................................................................................................................................... 4 - 95
4-3.Piping direction.......................................................................................................................................... 4 - 97
4-4.Weather countermeasure.......................................................................................................................... 4 - 102
5. Caution for refrigerant leakage ........................................................................................................................ 4 - 103
5-1.Refrigerant property................................................................................................................................... 4 - 103
5-2.Confirm the Critical concentration and take countermeasure.................................................................... 4 - 103
4 - 67

Mitsubishi Electric CITY MULTI PDFY-P24NMU-E Specifications

General

Model	PDFY-P24NMU-E
Series	CITY MULTI
Refrigerant	R410A
Type	Ceiling Concealed Duct
Power Supply	220-240V, 50 Hz, 1 Phase
Operating Temperature (Cooling)	18°C to 46°C
Operating Temperature (Heating)	-15°C to 24°C

Summary

Electrical Work

General Cautions for Electrical Work

Guidelines for safe and proper electrical installation and wiring practices.

Power Supply for Indoor and Outdoor Units

Details on electrical characteristics and power supply requirements for indoor and outdoor units.

Electrical Characteristics of Outdoor Unit (Cooling Mode)

Specific electrical data for outdoor units in cooling mode, including voltage and current ratings.

Power Cable Specifications

Requirements and specifications for power supply cables used in the system.

Power Supply Examples

Illustrative examples of power supply configurations for different system setups.

M-NET Control

Transmission Cable Length Limitation

Guidelines on maximum lengths for transmission cables to ensure signal integrity.

Transmission Cable Specifications

Details on the types and sizes of transmission cables suitable for M-NET communication.

System Configuration Restrictions

Constraints and rules for configuring the M-NET system, including unit quantities and controller limits.

Address Setting

Procedures and rules for setting unit addresses and connection numbers in the system.

Piping Design

R410A Piping Material

Specifications for copper piping materials used for R410A refrigerant systems.

Piping Design Guidelines

Guidelines and rules for designing the refrigerant piping layout for the system.

Refrigerant Charging Calculation

Method for calculating the additional refrigerant charge based on piping length and size.

Outdoor Installation

Requirement on Installation Site

Criteria for selecting a suitable location for outdoor unit installation to ensure proper operation.

Spacing Requirements

Required clearances and spacing around the outdoor unit for installation and maintenance.

Piping Direction and Handling

Guidance on handling refrigerant pipes during installation, including lifting and routing.

Weather Countermeasures

Measures to protect the outdoor unit from weather conditions like snow and wind.

Caution for Refrigerant Leakage

Refrigerant Property Information

Information on the properties of R410A refrigerant, including its density and flammability.

Critical Concentration and Countermeasures

Procedures to assess refrigerant concentration and implement countermeasures against leakage.