Waterside Piping Arrangements

Mechanical Specifications

Condensate Drain Connections The condensate drain is internally trapped. Condensate drain connections are on the unit’s left side. Connect condensate drain piping to the 1 1/4“ NPT female fitting, using at least 7/8” OD copper or 3/4“ OD iron pipe. Pitch the condensate line downward a minimum of 1/2” for each 10' of horizontal run, away from the unit. Be sure to install the condensate drain “P” trap drain plug. Before starting the unit, fill the trap with water to prevent negative pressure in the fan section from impeding condensate flow.To facilitate drain pipe cleaning, install plugged tees in place of 90°elbows.

General Waterside Recommendations: Cooling Towers

Cooling tower control affects the unit cycle rates. Condenser water temperature swings from 10-15°F may cause excessive compressor, water valve, and unit cycling. Be sure to set the tower controls to minimize compressor/ unit cycling.

Table I-MR-1. Water Connection Sizes.

Unit Size	Direct Condenser	Factory	Piped
SCWG 20-35	1-1/2 NPT	2-1/2	NPT

Install a condenser water pump between the cooling tower (either open or closed) and the self-contained unit. Lay out the remainder of the system’s condenser piping in reverse returns.This helps balance the system by equalizing the length of supply and return pipes. Multistory buildings may use a direct return system with balancing valves at each floor.

Install the supply riser and its return in close proximity. Furnish both with permanent thermometers to check the waterside balance during start-up and routine maintenance checks.

Also, include strainers at each pump inlet and unit. Install drain valves at the riser’s base to allow drainage points for system flushing during start-up and routine maintenance. For condenser draining and header removal, include a shutoff/ balancing valve on the entering and leaving waterside pipes, drain tees, and unions of each unit. Also, install a shutoff valve on the unit entering water pipe for condenser draining.

Note: Unit does not have floor drains.

WaterTemperature Requirements Do not allow the entering water temperature to go below 54°F (12.2°C) on units with constant water flow (basic piping). This will cause the compressors to shut down and the mechanical cooling function will lockout. However, the economizer (if enabled) will continue to function.The compressors will reset when the entering water temperature reaches 58°F (15°C).

Units with variable water flow (intremediate piping) have a modulating condensing pressure control valve that allows compressor operation down to entering water temperatures of 35°F (2°C).

For more information on constant and variable water flow, see the Sequence of Operation section of this manual.

Note: Units with a waterside economizer can be set from the human interface panel for variable or constant water flow.

Figure I-MR-2. Condenser water piping components for cooling tower system

Figure I-MR-3. Direct condenser connections.

SCXG-SVX01B-EN

SCXG-SVX01B-EN specifications

The Trane SCXG-SVX01B-EN is an advanced variable refrigerant flow (VRF) system designed to provide efficient and flexible heating and cooling solutions for commercial and residential applications. This system exemplifies Trane's commitment to innovation, energy efficiency, and ease of installation, making it a standout choice in the industry.

One of the main features of the SCXG-SVX01B-EN is its ability to deliver precise temperature control across multiple zones. The system utilizes a modular design that allows for the connection of multiple indoor units to a single outdoor unit, enabling simultaneous heating and cooling in different areas of a building. This zoned comfort not only enhances occupant satisfaction but also contributes to energy savings by allowing for targeted climate control where it is most needed.

Trane's VRF technology is complemented by its inverter-driven compressors, which adjust their speed according to the demand for heating or cooling. This means that the system operates more efficiently than traditional systems by consuming less energy during partial load conditions. The SCXG-SVX01B-EN also integrates advanced heat recovery capabilities, allowing it to transfer heat from one zone to another, further optimizing energy usage.

The unit's compact design simplifies installation, making it suitable for both retrofit projects and new constructions. The flexible piping layout supports various configurations, allowing easy adaptation to the building's architecture. The model also incorporates intelligent controls, offering a user-friendly interface that enhances operational flexibility and promotes energy management.

In addition to its performance features, the Trane SCXG-SVX01B-EN emphasizes sustainability. It uses advanced refrigerants with low global warming potential (GWP), aligning with environmental regulations and helping to minimize the system's ecological footprint. The durable construction of the system ensures longevity and reliability, reducing maintenance costs and enhancing overall operational efficiency.

Finally, Trane supports its products with comprehensive warranties and a network of service professionals, ensuring that customers have access to expert assistance throughout the life cycle of their system. The SCXG-SVX01B-EN represents a blend of technology, efficiency, and versatility, making it an ideal choice for those seeking an effective heating and cooling solution.

Trane SCXG-SVX01B-EN manual Waterside Piping Arrangements, Table I-MR-1. Water Connection Sizes

Models: SCXG-SVX01B-EN

Mechanical Specifications

Table I-MR-1. Water Connection Sizes.