Bard QH302, QH243, QH602, QH482, QH422 Duct Work, Filters, Supply Duct Connections, Filter Location

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DUCT WORK

Any heat pump is more critical of proper operating charge and an adequate duct system than a straight air conditioning unit. All duct work must be properly sized for the design airflow 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. 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.

The QTEC series heat pump has provision to attach a supply air duct to the top of the unit. Duct connection size is 12 inches x 20 inches. The duct work is field supplied and must be attached in a manner to allow for ease of removal when it becomes necessary to slide the unit out from the wall for service. See Figure 7 for suggested attachment method.

FIGURE 7

SUPPLY DUCT CONNECTIONS

SUPPLY DUCT

TO BE FIELD

SUPPLIED

ATTACHMENT

SCREWS TO

BE FIELD

SUPPLIED

ROOM SIDE

OF QTEC UNIT

DUCT FLANGE

PROVIDED WITH

UNIT

NOTE: Unit cabinet, supply air duct and free blow plenum are approved for “0” clearance to combustible material.

The QTEC series heat pumps are designed for use with free return (non-ducted) and either free blow with the use of QPB Plenum Box or a duct supply air system.

The QPB and QPBHW Plenum Box mounts on top of the unit and has both vertically and horizontally adjustable louvers on the front discharge grille.

For hot water coil option a QPBHWxx-F for free blow or QPBHWxx-D for ducted airflow is used

When used with a ducted supply, a QCX Cabinet Extension can be used to conceal the duct work above the unit to the ceiling. This extends 20" above the unit for a total height above the floor of 10'-7/8". The unit is equipped with a variable speed indoor blower motor which increases in speed with an increase in duct static pressure. The unit will therefore deliver proper rated air flow up to the maximum ESP shown in Table 9. However, for quiet operation of the air system, the duct static should be kept as low as practical, within the guidelines of good duct design.

FILTERS

Two 1-inch throw away filters [(1) 16x16 and (1)

16x20] are supplied with each unit. The filters slide into filter brackets. Refer to Figure 8.

The filters are serviced from the inside of the building by opening the hinged door. This door is attached by 1/4 turn fasteners and one locking latch.

The internal filter brackets are adjustable to accommodate 2-inch filters. The tabs for the 1-inch filters must be bent down to allow the 2-inch filters to slide in place.

FIGURE 8

FILTER LOCATION

FILTERS

RETURN AIR

GRILLE

Manual

2100-420H

Page

11 of 34

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Contents Instructions Models QH243 QH302 QH362 QH422 QH482 QH602 Qtec Series Packaged Heat Pump InstallationContents For More INFORMATION, Contact These Publishers Getting Other Information and PublicationsFactory BUILT-IN Electric Heat Table Qtec Model NomenclatureElectrical Specifications on page 6 a Electrical SpecificationsModel Unit Dimensions Removal of Unit from Skid Shipping DamageUnit Removal from Skid AIR Seal Under Qtec UnitUnit on Appliance Cart Minimum Installation HeightHandling Unit After Removal from Skid GeneralInstallation with Free Blow Plenum Ducted Application Filter Location Duct WorkFilters Supply Duct ConnectionsStandard Rear Drain Optional Side Drain Side View InstallationFresh AIR Intake Condensate DrainUnit Mounting Service LightRear Drain TOP View Removing Locking Screws from Wheels Installation InstructionsMounting the Unit Operating Voltage Range Wiring Main PowerWiring LOW Voltage Wiring Component LocationLOW Voltage Connections for DDC Control LOW Voltage ConnectionsWall Thermostats Thermostat Predominant FeaturesRemote Thermostat Wiring Diagram Thermostat Option Unit Mounted Thermostat Wiring Diagram Thermostat Option Unit Mounted Thermostat Wiring Diagram Thermostat Option Start UP Mist Eliminator Service Service HintsBarometric Fresh AIR Damper Standard Vent OptionsFresh AIR Damper Removal Qerv Removal Heat Pump Control Board HPC Pressure Service PortsSequence of Operation Optional Climate Controls Sequence of OperationDefrost Cycle LOW Pressure Control Bypass TimerTroubleshooting TroubleshootingTemperature F VS Resistance R of Temperature Sensor Solid State Heat Pump Control Troubleshooting ProcedureChecking Temperature Sensor Don’t Troubleshooting GE ECM MotorsReplacing ECM Control Module Troubleshooting GE ECM Motors CONT’DIndoor Blower Performance FAN Blade Setting Dimensions Refrigerant ChargeFAN Blade Setting FAN Blade Dimensions Super Heat AT CompressorModel Temp Pressure Cooling Pressure ALL Temperatures in Degrees FReturn AIR Temperature Entering Outdoor Coil Model Pressure Heating Pressure ALL Temperatures in Degrees F

QH482, QH243, QH302, QH422, QH602 specifications

Bard has established itself as a leader in the heating, ventilation, and air conditioning (HVAC) industry with its innovative line of products, including the Bard QH series. Models such as QH362, QH602, QH422, QH302, and QH243 showcase the perfect blend of performance, efficiency, and advanced technology.

The Bard QH362 is built for both affordability and efficiency, making it ideal for smaller commercial spaces. This model offers a cooling capacity of 36,000 BTUs, providing optimal comfort with minimal energy consumption. Its robust design ensures long-lasting performance, while the air-cooled condenser enhances reliability in various climates.

The QH602 model takes it a step further with enhanced cooling capabilities, boasting a 60,000 BTU rating. This unit is particularly well-suited for larger commercial applications. Its advanced heat pump technology allows for efficient heating and cooling, ensuring indoor comfort year-round. The QH602 features a user-friendly control system that optimizes energy use and simplifies operation.

Next up, the QH422 model is designed for mid-sized commercial environments, offering 42,000 BTUs of cooling power. This model is distinguished by its energy-efficient design, significantly reducing operational costs while maintaining high-performance levels. The QH422 includes a smart thermostat that allows users to monitor and adjust settings remotely, further enhancing energy management.

The QH302 model is perfect for businesses looking for a balance between power and efficiency. With a capacity of 30,000 BTUs, this unit effectively meets the needs of medium-sized spaces. Its compact design allows for easy installation and maintenance, making it a favorite among commercial property managers.

Lastly, the QH243 model rounds out the series with a 24,000 BTU capacity, ideal for smaller commercial applications. This model showcases Bard's commitment to energy efficiency, equipped with environmentally friendly refrigerants and advanced insulation materials that minimize energy loss.

These Bard models feature innovative technologies such as variable-speed fans, which ensure consistent airflow regardless of outdoor conditions. Additionally, noise-reduction technologies provide a quieter operation, creating a more pleasant indoor environment.

In summary, the Bard QH series, including the QH362, QH602, QH422, QH302, and QH243, offers a comprehensive range of HVAC solutions tailored to diverse commercial needs. With their efficient designs, advanced technology, and focus on reliability, these models set the standard for modern heating and cooling equipment.
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