Parts list

GB WT05383X01

Air-Conditioners For Building Application

External Heater Adapter

PAC-YU25HT

Installation Manual

R410A Series

This manual describes installation of the External Heater Adapter that connects to CITY MULTI air conditioner R410A series indoor unit. This products is the special wiring parts to drive an electric heater with the air conditioner. Please refer to the technical manual for details. For your safety, be sure to read firstly “ 1 Safety Precaution ” described below thoroughly and then install the PAC-YU25HT.

Safety Precaution

●The following two symbols are used to denote dangers that may be caused by incorrect use.

WARNING This symbol denotes what could lead to serious injury or death if your misuse the PAC-YU25HT.

CAUTION This symbol denotes what could lead to a personal injury or property damage if you misuse the PAC-YU25HT.

●After reading this instruction manual, keep it in a place where the end user can find it anytime he or she wants to it. When someone moves, repairs or uses the PAC-YU25HT, make sure that this manual is forwarded to the final user.

WARNING

Ask your dealer or technical representative to install the unit.

Any deficiency caused by your own installation may result in an electric shock or fire.

Ensure that installation work is done correctly following this instruc- tion manual

Any deficiency caused by installation may result in an electric shock or fire.

Firmly connect the wiring using the specified cables.

Carefully check that the cables do not exert any forces on the termi- nals.

Improper wiring connections may produce heat and possibly a fire.

Never modify or repair the PAC-YU25HT.

Any deficiency caused by your modification or repair may result in an elec- tric shock or fire.

Consult with your dealer about repair.

All electrical work must be performed by a licenced technician, ac- cording to local regulations and the instructions given in this manual. Any lack of electric circuit or any deficiency caused by installation may result in an electric shock or fire.

Do not move and re-install the PAC-YU25HT yourself.

Any deficiency caused by installation may result in an electric shock or fire. Ask your distributor or special vendor for moving and installation.

Stop the operation if any malfunction occurs.

If malfunction occurs (burning smell, etc.) stop the operation and turn off the power supply. Contact your dealer or technical representative. If the controller continues to operate after a malfunction occurs, this may cause damage, electric shock or fire.

Do not turn on the main power until installation has been completed.

Doing so may result in electric shock or fire.

Leave sufficient space between heater and indoor unit to allow for air movement to prevent the indoor unit from overheating.

If they are installed too closely and the indoor unit temperature exceeds 40 ˚C, malfunctions or fire may result.

Keep the heater clean to keep the indoor unit from sucking in accu- mulated dust on the heater.

Dust particles that enter the indoor unit may cause fire.

When air conditioner and heater are configured to perform an inter- locked operation, do not use any other type of cables except this ex- ternal heater adapter (PAC-YU25HT).

The use of any other type of cables may result in malfunctions or fire.

Do not build a heater into the indoor unit.

Doing so may result in fire.

CAUTION

Do not install in any place exposed to flammable gas leakage. Flammable gases accumulated around the body of PAC-YU25HT may cause an explosion.

Do not use in any special environment.

Using in any place exposed to oil (inculuding machine oil), steam and sul- furic gas may deteriorate the performance significantly or give damage to the component parts.

Wire so that it does not receive any tension.

Tension may cause wire breakage, heating or fire.

Do not install in any place where acidic or alkaline solution or special spray are often used.

Doing so may cause an electric shock or malfunction.

Do not install in any steamy place such a bathroom or kitchen.

Avoid any place where moisture is condensed into dew. Doing so may cause an electric shock or malfunction.

Do not wash with water.

Doing so may cause an electric shock or malfunction.

Do not install in any place at a temperature of more than 40˚C (104˚F) or less than 0˚C (32˚F) or exposed to direct sunlight.

Check that the following parts are included in the package.
(1)	External output cable (with a yellow connector)	2 in total
	Two types of cables with different connectors are included.
(2)	Panel heater connector	3 in total
	1 White : 1
	2 Green: 2 (2 types)

PAC-YU25HT specifications

Mitsubishi Electronics has long been a leader in the field of climate control technologies, and the PAC-YU25HT is a testament to their commitment to innovation and efficiency. Designed primarily for use in commercial and industrial applications, this advanced air conditioning unit offers a range of features that ensure optimal performance and reliability.

At the heart of the PAC-YU25HT is its powerful inverter technology, which allows for variable speed operation. This means that the unit can adjust its cooling output according to the needs of the environment. By efficiently modulating the compressor speed, the PAC-YU25HT not only provides optimal temperature control but also minimizes energy consumption, making it an environmentally friendly choice.

One of the standout features of the PAC-YU25HT is its high cooling capacity, making it suitable for larger spaces. With a capacity of 25 kW, it can effectively manage the cooling needs of extensive commercial environments, ensuring comfort for occupants even in the warmest conditions. The unit is also equipped with a sophisticated air filtration system. This system effectively captures dust, pollen, and other allergens, improving indoor air quality and creating a healthier environment.

The PAC-YU25HT is designed with user convenience in mind. Its intuitive control interface allows for easy operation and monitoring, providing users with the flexibility to set their preferred cooling schedules. Moreover, the unit is compatible with a range of smart building technologies, enabling it to be integrated into existing building management systems for enhanced functionality.

Robust and durable, the PAC-YU25HT is built to withstand harsh environmental conditions. Its high-quality materials and construction ensure longevity and reliability, making it a worthwhile investment for businesses looking to enhance their climate control systems.

In addition, Mitsubishi's commitment to innovation is evident in the PAC-YU25HT's low noise operation. The unit is designed to operate quietly, making it ideal for environments where noise reduction is crucial, such as offices or conference rooms.

In summary, the Mitsubishi Electronics PAC-YU25HT combines high capacity, energy efficiency, and advanced technology, making it an exceptional choice for commercial and industrial cooling solutions. With its user-friendly features and robust design, it continues to set the standard for modern air conditioning systems.