Couplings

16.Lubricate male half diaphragm and synthetic rubber seal with refrigerant oil. Thread coupling halves together by hand to insure proper mating of threads. Be sure to hold the coupling firmly to prevent movement of the coupling and tubing. Failure to do so could tear out the diaphragm causing a blockage of the system. Use proper size wrenches (on coupling body hex and on union nut) and tighten until coupling bodies ”bottom” or a definite resistance is felt.

CAUTION

After starting to tighten up the fitting, never try to back it off or take it apart.

17.Using a marker or ink pen, mark a line lengthwise from the coupling union nut to the bulkhead. Then tighten an additional 1/4 turn. The misalignment of the line will show the amount the coupling has been tightened. This final 1/4 turn is necessary to insure the formation of leakproof joint. If a torque wrench is used, the torque values shown in Table 5 are recommended.

TABLE 5

Coupling Size	Feet Pounds

-6	10 - 12

-10	35 - 45

-11	35 - 45

-12	50 - 65

18.Leak test all connections using an electronic leak detector or a halide torch.

19.When tubing is installed in attics or drop ceilings, insulate the couplings on the larger tube thoroughly with 3/8” wall thickness, closed cell sponge tube insulation or equivalent. Failure to insulate will result in water damage to ceiling since the fitting will “sweat” and drop water on the ceiling.

Manual 2100-346 Page 8

HAC601-BD040, HAC481-BD040, HAC181-AD040, HAC361-AD040, HAC481-AD040 specifications

The Bard HAC series, specifically the HAC421-AD040, HAC241-AD040, HAC301-AD040, HAC601-AD040, and HAC481-AD040 models, represents a versatile and robust selection of commercial heating and cooling systems designed for a variety of applications. These units are known for their efficiency, reliability, and innovative features, making them ideal for business, industrial, and institutional use.

One of the standout characteristics of the Bard HAC series is its energy efficiency. Each model is built to operate at high efficiency levels, which helps to reduce energy costs and contributes positively to environmental sustainability. The units typically feature advanced technology such as dual-fuel operation, allowing them to run on electricity and gas, providing flexibility in cost management depending on energy prices.

The HVAC systems are designed with the user experience in mind, incorporating easy-to-use digital controls. These controls provide users with the ability to adjust settings precisely and monitor system performance easily, contributing to improved comfort levels in any space. Additionally, the HAC series is known for its quiet operation, reducing noise pollution and creating a serene environment conducive to productivity.

Durability is another key aspect of the Bard HAC series. Built with high-quality materials, these units are designed to withstand the rigors of commercial use. Protective coatings and robust construction make them suitable for various applications, from schools and hospitals to warehouses and retail spaces.

Another important feature is their compact design, which allows for easy installation in tight spaces. This attribute is particularly valuable for urban environments where space is at a premium. The units also have a range of customizable options, including various sizes and heating and cooling capacities, ensuring that they can meet specific operational needs.

Bard HVAC also places an emphasis on ease of maintenance. With easily accessible components and straightforward design, routine upkeep can be performed quickly, minimizing downtime and reducing operational costs.

In conclusion, the Bard HAC421-AD040, HAC241-AD040, HAC301-AD040, HAC601-AD040, and HAC481-AD040 models are exemplary choices for those seeking a dependable, efficient, and adaptable heating and cooling solution. With their energy efficiency, user-friendly technology, durability, space-saving designs, and ease of maintenance, these units stand out as leading options for commercial HVAC needs.