FIG. 7 - BOTTOM SUPPLY CONNECTION

FIG. 7 - BOTTOM SUPPLY CONNECTION

EXTERNAL SHUT-OFF

WARNING: Natural gas may contain some propane. Propane,

being an excellent solvent, will quickly dissolve white lead or most standard commercial compounds. Therefore, a special pipe compound must be applied when wrought iron or steel pipe is used. Shellac base compounds such as Gaskolac or Stalastic, and compounds such as Rectorseal #5, Cyde’s or John Crane may be used.

4.All piping should be cleaned of dirt and scale by hammering on the outside of the pipe and blowing out the loose dirt and scale. Before initial start-up, be sure that all of the gas lines external to the unit have been purged of air.

5.The gas supply should be a separate line and installed in accordance with all safety codes as prescribed under “Limitations”. After the gas connections have been completed, open the main shut-off valve admitting normal gas pressure to the mains. Check all joints for leaks with soap solution or other material suitable for the purpose.

NEVER USE A FLAME.

6.The furnace and its individual manual shut-off valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.48kPa).

The furnace must be isolated from the gas supply piping system by closing its individual manual shut-off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig (3.48kPa).

7.A 1/8 inch NPT plugged tapping, accessible for test gage connection, must be installed immediately upstream of the gas supply connection to the furnace.

530.18-N11Y

L.P. UNITS, TANKS AND PIPING (DCG Models)

All gas heat units are shipped from the factory equipped for natural gas use only. The unit may be converted in the field for use with L.P./propane gas with accessory kit model number 1NP0418.

All L.P./propane gas equipment must conform to the safety standards of the National Fire Protection Association.

For satisfactory operation, L.P./propane gas pressure must be

8.8inch W.C at the unit under full load. Maintaining proper gas pressure depends on three main factors:

1.The vaporization rate which depends on (a) the tempera- ture of the liquid and (b) the “wetted surface” area of the container or containers.

2.The proper pressure regulation. (Two-stage regulation is recommended from the standpoint of both cost and effi- ciency.)

3.The pressure drop in the lines between regulators and between the second stage regulator and the appliance. Pipe size required will depend on the length of the pipe run and the total load of all appliances.

Complete information regarding tank sizing for vaporization, recommended regulator settings, and pipe sizing is available from most regulator manufacturers and L.P./propane gas suppliers.

L.P./propane gas is an excellent solvent and special pipe compound must be used when assembling piping for this gas as it will quickly dissolve white lead or most standard commercial compounds. Shellac base compounds such as Rectorseal #5 are satisfactory for this type of gas.

Check all connections for leaks when piping is completed, using a soap solution. NEVER USE A FLAME.

Unitary Products Group

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York D2CG300, D2CE Bottom Supply Connection, External Shut-Off, L.P. UNITS, TANKS AND PIPING DCG Models
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D2CG300, D2CE specifications

The York D2CE and D2CG series represent cutting-edge advancements in energy-efficient chiller technology, specifically designed to optimize performance in a variety of commercial and industrial applications. These chillers are known for their ability to deliver reliable cooling while minimizing energy consumption, making them a preferred choice for businesses aiming to reduce their carbon footprint and operational costs.

One of the standout features of the York D2CE and D2CG chillers is their utilization of advanced scroll compressor technology. This technology not only enhances the reliability of the systems but also significantly improves energy efficiency, allowing for lower operational costs. The chillers are built to provide high efficiency across a diverse range of operating conditions, ensuring consistent performance during peak loads.

The D2CE series, designed primarily for air-cooled applications, benefits from a compact and modular design, allowing for flexible installation in tight spaces. Additionally, its quiet operation makes it suitable for use in noise-sensitive environments, such as healthcare facilities and educational institutions. The model is equipped with microprocessor controls that facilitate precise temperature regulation and system diagnostics, ensuring optimal operation.

Conversely, the D2CG series focuses on water-cooled applications, featuring robust construction that accommodates higher cooling capacities. This model also includes advanced heat exchanger technology, which maximizes heat transfer efficiency. The D2CG’s intelligent controls not only help in energy management but also provide remote monitoring capabilities, allowing facility managers to analyze performance and troubleshoot issues from anywhere.

Both models utilize environmentally friendly refrigerants, aligning with global regulations and promoting sustainability. Enhanced filtration options are available, enabling the units to maintain high indoor air quality by minimizing dust and other pollutants.

In addition to their energy-saving attributes, the York D2CE and D2CG chillers are designed for ease of maintenance, with accessible components and modular parts that simplify service procedures. This, coupled with their durable construction, leads to greater longevity and reliability in operation.

In summary, the York D2CE and D2CG chillers are leading examples of modern HVAC engineering, combining efficiency, flexibility, and sustainability. Their innovative technologies and thoughtful design make them an excellent addition to any facility looking to enhance its cooling systems while adhering to environmental standards.
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