Installation

Split System Units

The following refrigerant piping and interconnecting wiring instructions apply to unit ventilators with direct ex- pansion type cooling coils used in con- junction with air-cooled condensing units. Reference must also be made to the condensing unit installation and wiring manuals which are shipped with the condensing unit.

Note: The ETL listing mark applied to a unit ventilator does not apply to any associated refrigerant condensing unit.

Refrigerant Piping

Unit ventilators with direct expansion cooling contain a nitrogen holding charge in the evaporator coils. Con- nections are ‘‘pinched-off’’ at the fac- tory.

To connect the condensing unit lines, cut off the stubouts and swage. The condensing unit lines can then be brought into the swage and brazed. Trane recommends the use of nitro- gen purge when brazing refrigerant lines to prevent formation of oxides in the lines.

Install the refrigerant suction and liq- uid lines as described in the condens- ing unit installation instructions. The TXV is factory installed on the Unit Ventilator. Piping should be run straight out through the back of the unit. Access piping knockouts are lo- cated in the rear panels of the unit, as shown in dimensional section of this manual.

Recommended refrigerant line con- nections for various unit combinations are given in Table 7. Typical Superheat Charging Charts are shown in the Trane Service Facts found in the con- densing unit section manual. Refriger- ant charge weights can also be determined with your local Trane sales engineer using a valid Trane Se- lection Program.

Steam Piping

When air, water or another product is heated, the temperature or heat trans- fer rate can be regulated by a modulat- ing steam pressure control valve.

Since pressure and temperature do not vary at the same rate as load, the steam trap capacity, which is deter- mined by the pressure differential be- tween the trap inlet and outlet, may be adequate at full load, but not some lesser load.

There are detailed methods for deter- mining condensate load under various operating conditions. However, in most cases this is not necessary if the coils are piped as shown in Figure 5. Follow the procedure documented in the ASHRAE Systems Handbook, Steam Systems.

Temp. Regulating Valve

 

Coil

To Condensate

 

return

H= 12"

 

minimum

 

Vacuum Equalizer

 

F&TTrap

 

See text for sizing

Gravity flow to vented receiver

Figure 5: Steam piping

UV-SVN03D-EN

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Trane 750 CFM, 1500 CFM manual Split System Units, Refrigerant Piping, Steam Piping
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750 CFM, 1500 CFM specifications

Trane has long been a leader in the heating, ventilation, and air conditioning (HVAC) industry, and among its extensive product range, the Trane 1500 CFM and 750 CFM air handling units stand out due to their innovative design and performance capabilities. These units are engineered to provide exceptional airflow and efficiency, catering to a variety of commercial and industrial environments.

One of the main features of the Trane 1500 CFM and 750 CFM units is their ability to maintain optimal indoor air quality. Both units feature high-efficiency air filters that effectively capture dust, allergens, and other airborne particles, ensuring that the air quality remains high. This is particularly important in commercial spaces, where the health and comfort of occupants is a top priority.

In terms of energy efficiency, the Trane units are equipped with advanced technologies that minimize energy consumption while maximizing cooling and heating performance. The units are designed to comply with the most stringent efficiency standards, making them an environmentally friendly choice. The use of variable speed fans allows for precise control over airflow, further enhancing energy savings by adjusting to the specific demands of the space.

Another notable characteristic of the Trane air handling units is their robust construction. Built with high-quality materials, they are designed to withstand harsh environmental conditions, ensuring durability and reliability over long periods of use. The units come with sound-attenuating features, making them suitable for noise-sensitive environments, while their compact design facilitates easy installation in limited spaces.

Trane also integrates smart technology into its air handling units, enabling connectivity with building management systems (BMS). This feature allows for real-time monitoring and remote control of unit operations, providing facility managers with valuable insights into performance and energy usage. Such connectivity not only improves operational efficiency but also simplifies maintenance tasks by providing timely alerts and diagnostics.

In summary, the Trane 1500 CFM and 750 CFM air handling units are designed with key features that enhance air quality, energy efficiency, and user convenience. Their innovative technologies and durable construction make them a reliable choice for various commercial applications, ensuring a comfortable and healthy indoor environment for all occupants. With Trane's commitment to quality and performance, these units represent the forefront of HVAC technology.
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