Bard QH362, QH243, QH602, QH482, QH422, QH302 Service Hints, Mist Eliminator Service

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SERVICE HINTS

1.Caution user to maintain clean air filters at all times. Also, not to needlessly close off supply air registers. This may reduce airflow through the system, which shortens equipment service life as well as increasing operating costs and noise levels.

2.Switching to heating cycle at 75°F or higher outside temperature may cause a nuisance trip of the remote reset high pressure switch. Turn thermostat off, then on to reset the high pressure switch.

3.The heat pump wall thermostats perform multiple functions. Be sure that all function switches are correctly set for the desired operating mode before trying to diagnose any reported service problems.

4.Check all power fuses or circuit breakers to be sure they are the correct rating.

5.Periodic cleaning of the outdoor coil to permit full and unrestricted airflow circulation is essential.

6.Some service requires the need to remove the unit from the wall including replacement of the indoor coil and/or the outdoor coil. Also, servicing the outdoor fan motor or fan blade will require removing the unit from the wall if the unit is installed at a height that is not easily accessible from the outside of the building.

In order to remove the unit from the wall the following procedure must be used:

a.Turn off power to the unit at the remote location. Some units may have more than one power supply.

b.Disconnect field wiring at unit terminal block and remove from unit.

c.Disconnect condensate drain.

d.Remove the lower skirting around the unit.

e.Remove wall mounting brackets from wall on each side of the unit.

f.If unit is attached to duct work, remove upper cabinet extension by removing the top center screw only from the cabinet side panel.

g.Remove screws that attach the duct work to the unit flanges.

This unit is equipped with four rollers mounted to the base. For ease of pulling unit out from the wall, you may want to remove the bottom service door which requires removal of the return air panel, and grip the front flange of the base pan then pull straight out.

7.Annual maintenance is required to make sure that all of the systems are functioning properly.

a.Check to make sure that the drains are not obstructed in any way.

b.Remove any debris in the condenser section of the unit.

c.Inspect and clean mist eliminator as described below.

d.Inspect and wash outdoor coil as necessary.

MIST ELIMINATOR SERVICE

A mist eliminator is supplied with the wall sleeve. The mist eliminator is constructed of an aluminum frame and mesh. The mist eliminator is located in the top section of the wall sleeve and can be removed from the inside of the building without removing the unit from the wall. This requires that the ventilation package must be removed.

It is recommended that the mist eliminator be inspected annually and serviced as required. The mist eliminator can be inspected from the outside of the building by looking through the outdoor grille. The mist eliminator can be serviced from the outside by using a vacuum cleaner. The outdoor grille must be removed. Use the vacuum to remove dirt and debris from the surface of the mist eliminator. If additional cleaning is required, the mist eliminator will have to be removed from the sleeve.

The ventilation package will have to be removed to gain access to the mist eliminator. If the blank off plate option is used, it is not necessary to service the mist eliminator. The steps necessary to remove each of the vent options are listed on the following pages.

The mist eliminator can be cleaned by washing with soap and water. The excess water should be shaken off the mist eliminator before it is reinstalled.

Manual

2100-420H

Page

22 of 34

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Contents Qtec Series Packaged Heat Pump Installation Instructions Models QH243 QH302 QH362 QH422 QH482 QH602Contents Getting Other Information and Publications For More INFORMATION, Contact These PublishersQtec Model Nomenclature Factory BUILT-IN Electric Heat TableElectrical Specifications Electrical Specifications on page 6 aModel Unit Dimensions AIR Seal Under Qtec Unit Shipping DamageUnit Removal from Skid Removal of Unit from SkidGeneral Minimum Installation HeightHandling Unit After Removal from Skid Unit on Appliance CartInstallation with Free Blow Plenum Ducted Application Supply Duct Connections Duct WorkFilters Filter LocationCondensate Drain Optional Side Drain Side View InstallationFresh AIR Intake Standard Rear DrainRear Drain TOP View Service LightUnit Mounting Mounting the Unit Installation InstructionsRemoving Locking Screws from Wheels Component Location Wiring Main PowerWiring LOW Voltage Wiring Operating Voltage RangeLOW Voltage Connections LOW Voltage Connections for DDC ControlThermostat Predominant Features Wall ThermostatsRemote Thermostat Wiring Diagram Thermostat Option Unit Mounted Thermostat Wiring Diagram Thermostat Option Unit Mounted Thermostat Wiring Diagram Thermostat Option Start UP Service Hints Mist Eliminator ServiceVent Options Barometric Fresh AIR Damper StandardFresh AIR Damper Removal Qerv Removal Optional Climate Controls Sequence of Operation Pressure Service PortsSequence of Operation Heat Pump Control Board HPCLOW Pressure Control Bypass Timer Defrost CycleTroubleshooting TroubleshootingChecking Temperature Sensor Solid State Heat Pump Control Troubleshooting ProcedureTemperature F VS Resistance R of Temperature Sensor Troubleshooting GE ECM Motors Don’tTroubleshooting GE ECM Motors CONT’D Replacing ECM Control ModuleSuper Heat AT Compressor FAN Blade Setting Dimensions Refrigerant ChargeFAN Blade Setting FAN Blade Dimensions Indoor Blower PerformanceCooling Pressure ALL Temperatures in Degrees F Model Temp PressureHeating Pressure ALL Temperatures in Degrees F Return AIR Temperature Entering Outdoor Coil Model Pressure

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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