Duct Work, Filters, Fresh AIR Intake, Condensate Drain

DUCT WORK

All duct work, supply and return, must be properly sized for the design air flow requirement of the equipment. Air Conditioning Contractors of America (ACCA) is an excellent guide to proper sizing. All duct work or portions thereof not in the conditioned space should be properly insulated in order to both conserve energy and prevent condensation or moisture damage.

Refer to Table 10 for maximum static pressure available for duct design.

Design the duct work according to methods given by the Air Conditioning Contractors of America (ACCA). When duct runs through unheated spaces, it should be insulated with a minimum of one inch of insulation. Use insulation with a vapor barrier on the outside of the insulation. Flexible joints should be used to connect the duct work to the equipment in order to keep the noise transmission to a minimum.

A 1/4 inch clearance to combustible material for the first three feet of duct attached to the outlet air frame is required. See Wall Mounting Instructions and Figures 3 and 4 for further details.

Ducts through the walls must be insulated and all joints taped or sealed to prevent air or moisture entering the wall cavity.

Some installations may not require any return air duct. A metallic return air grille is required with installations not requiring a return air duct. The spacing between louvers on the grille shall not be larger than 5/8 inch.

Any grille that meets with 5/8 inch louver criteria may be used. It is recommended that Bard Return Air Grille Kit RG2 through RG5 or RFG2 through RFG5 be installed when no return duct is used. Contact distributor or factory for ordering information. If using a return air filter grille, filters must be of sufficient size to allow a maximum velocity of 400 fpm.

NOTE: If no return air duct is used, applicable installation codes may limit this cabinet to installation only in a single story structure.

FILTERS

A one inch throwaway filter is supplied with each unit. The filter slides into position making it easy to service. This filter can be serviced from the outside by removing the service door. A one inch washable filter and two inch pleated filter are also available as optional accessories. The internal filter brackets are adjustable to accommodate the two inch filter by loosening two (2) screws on each bracket assembly and sliding the brackets apart to the required width and retightening the four (4) screws.

FRESH AIR INTAKE

All units are built with fresh air inlet slots punched in the service panel.

If the unit is equipped with a fresh air damper assembly, the assembly is shipped already attached to the unit. The damper blade is locked in the closed position. To allow the damper to operate, the maximum and minimum blade position stops must be installed. See Figure 2.

All capacity, efficiency and cost of operation information as required for Department of Energy “Energyguide” Fact Sheets is based upon the fresh air blank-off plate in place and is recommended for maximum energy efficiency.

The blank-off plate is available upon request from the factory and is installed in place of the fresh air damper shipped with each unit.

CONDENSATE DRAIN

A plastic drain hose extends from the drain pan at the top of the unit down to the unit base. There are openings in the unit base for the drain hose to pass through. In the event the drain hose is connected to a drain system of some type, it must be an open or vented type system to assure proper drainage.

FIGURE 2

FRESH AIR DAMPER

BLADE IS LOCKED

CLOSED FOR

SHIPPING.

MIS-938

Manual 2100-398 Page 6

WA423, WA381, WA484, WA491, WA602 specifications

Bard is a leading manufacturer in the field of air conditioning and heating solutions, known for its innovative products that cater to both residential and commercial needs. Among their notable models are the Bard WA381, WA602, WA484, WA491, and WA423, each designed with specific features and technologies that enhance efficiency, reliability, and user comfort.

The Bard WA381 is a compact unit that excels in energy efficiency and ease of installation. With a focus on high-performance cooling and heating capacities, this model is ideal for areas requiring reliable temperature control in limited spaces. Its advanced engineering ensures low noise operation, making it suitable for quiet environments, such as libraries and offices. The WA381's user-friendly controls and robust construction make it a favored choice among contractors and users alike.

The WA602 model stands out for its dual functionality, providing both cooling and heating. This unit incorporates state-of-the-art heat pump technology, allowing for year-round comfort. With a high Seasonal Energy Efficiency Ratio (SEER) rating, the WA602 combines cost-effective performance with eco-friendly operation. Its durable design and weather-resistant features ensure long-term reliability, even in harsh environments.

Bard's WA484 offers a seamless blend of performance and versatility. This model is equipped with advanced refrigeration technology, providing superior cooling efficiency. The WA484 is designed to accommodate varying load conditions, making it adaptable to numerous applications. Additionally, its intelligent control systems facilitate easy monitoring and adjustments, promoting optimal energy use and user convenience.

The WA491 is engineered with a focus on energy conservation and performance. With a high Energy Efficiency Ratio (EER), this unit minimizes operational costs while delivering exceptional climate control. The WA491's robust construction includes advanced insulation and weatherproofing, ensuring effective performance in diverse conditions. Furthermore, its features include remote monitoring capabilities, allowing users to manage their heating and cooling systems from anywhere.

Lastly, the WA423 is designed for maximum flexibility and efficiency. This model boasts a compact footprint, making it suitable for various installations. With an emphasis on quiet operation, the WA423 is perfect for settings where noise reduction is critical. It is equipped with modern control systems that optimize performance while reducing energy consumption, making it an eco-friendly choice for users.

Collectively, these Bard models reflect a commitment to quality, efficiency, and user satisfaction, setting the benchmark for heating and cooling solutions in the market.