Bard 1 W48A1, W42L Important Installer Note, High Pressure Switch, Phase Monitor, Service Hints

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START UP (Continued)

IMPORTANT INSTALLER NOTE

For improved start up performance wash the indoor coil with a dish washing detergent.

HIGH PRESSURE SWITCH

All W**A/W**L wall mounted air conditioner series models are supplied with a remote reset for the high and low pressure switch. If tripped, this pressure switch may be reset by turning the thermostat off then back on again.

THREE PHASE SCROLL COMPRESSOR START UP INFORMATION

Scroll compressors, like several other types of compressors, will only compress in one rotational direction. Direction of rotation is not an issue with single phase compressors since they will always start and run in the proper direction.

However, three phase compressors will rotate in either direction depending upon phasing of the power. Since there is a 50-50 chance of connecting power in such a way as to cause rotation in the reverse direction, verification of proper rotation must be made. Verification of proper rotation direction is made by observing that suction pressure drops and discharge pressure rises when the compressor is energized. Reverse rotation also results in an elevated sound level over that with correct rotation, as well as substantially reduced current draw compared to tabulated values.

Verification of proper rotation must be made at the time the equipment is put into service. If improper rotation is corrected at this time, there will be no negative impact on the durability of the compressor. However, reverse operation for over one hour may have a negative impact on the bearing due to oil pump out.

NOTE: If compressor is allowed to run in reverse rotation for several minutes, the compressor’s internal protector will trip.

All three phase compressors are wired identically internally. As a result, once the correct phasing is determined for a specific system or installation, connecting properly phased power leads to the same Fusite terminal should maintain proper rotation direction.

The direction of rotation of the compressor may be changed by reversing any two line connections to the unit.

PHASE MONITOR

All units with three phase scroll compressors are equipped with a 3 phase line monitor to prevent compressor damage due to phase reversal.

The phase monitor in this unit is equipped with two LEDs. If the Y signal is present at the phase monitor and phases are correct the green LED will light.

If phases are reversed, the red fault LED will be lit and compressor operation is inhibited.

If a fault condition occurs, reverse two of the supply leads to the unit. Do not reverse any of the unit factory wires as damage may occur.

CONDENSER FAN OPERATION

Applies to W42, W48, W60 and W70 models only. The condenser fan motor on 230/208 volt, one and three phase, 60 HZ units is a two-speed motor that comes factory wired on high speed for peak performance. If ambient conditions permit, it can be reconnected to low speed (red wire) for lower sound level. See wiring diagram.

50 HZ models must have fan wired on low speed. These models are factory wired on low speed.

SERVICE HINTS

1.Caution owner/operator to maintain clean air filters at all times. Also, not to needlessly close off supply and return air registers. This reduces airflow through the system, which shortens equipment service life as well as increasing operating costs.

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

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

Manual

2100-508A

Page

16 of 25

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Contents Bard Manufacturing Company, Inc Contents Getting Other Information and Publications For More INFORMATION, Contact These PublishersGeneral Shipping DamageAIR Conditioner Wall Mount Model Nomenclature Duct Work FiltersFresh AIR Intake Condensate DrainWall Mounting Information Mounting the UnitRight W Unit Left UnitMounting Instructions W30A1, W30L1, W36A1, W36L1 W42A1, W42L1, W48A1, W48L1, W60A1, W60L1, W70A1, W70L1 Electric Heat Clearance Wall Mounting Instructions Common Wall Mounting Installations Free AIR Flow Ducted Supply No Duct Return AT UnitWiring LOW Voltage Wiring Wiring Main PowerTAP Range Safety Practices Topping OFF System ChargeImportant Installer Note High Pressure SwitchThree Phase Scroll Compressor Start UP Information Phase MonitorSequence of Operation Pressure Service PortsCompressor Control Module Removal of FAN Shroud FAN Blade Setting DimensionsRefrigerant Charge Cooling Pressure Table 100 105 110 115 120Electrical Specifications W**A Series Electrical Specifications W**L Series Indoor Blower Performance Recommended AirflowMaximum ESP of Operation Electric Heat only Electric Heat Optional Accessories Vent & Control Options W18, W24 W30, W36 W42, W48, W60, W70
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W70A1, W70L1, W42L, 1 W48A1 specifications

The Bard range of products, specifically the W24L1, W48L1, W42L1, W70A1, and W60A1 models, showcases advanced engineering aimed at providing efficient heating and cooling solutions. Each model comes with distinctive features and technologies tailored to meet various residential and commercial needs.

Starting with the W24L1 model, it is designed for compact spaces while delivering powerful performance. Its heating capacity is optimal for smaller areas, making it suitable for residential applications. The W24L1 incorporates advanced inverter technology, ensuring energy efficiency and reducing operational costs. This model is equipped with a user-friendly interface, enabling easy control and monitoring of settings.

Next is the W48L1, which offers increased capacity for larger spaces. This model is characterized by its robust build and enhanced airflow system that ensures uniform heating and cooling throughout the environment. The W48L1 utilizes environmentally friendly refrigerants, highlighting Bard’s commitment to sustainability. Its smart technology integration allows for seamless compatibility with smart home systems, providing added convenience for users.

The W42L1 model stands out for its versatility in both heating and cooling applications. It is engineered with high-efficiency components, which contribute to lower energy consumption. Features like programmable thermostats and variable speed fans enhance user comfort and adjust to varying demand. The W42L1 also comes with a durable construction, ensuring longevity and reliability even in challenging conditions.

For those demanding even higher performance, the W70A1 model caters to significant heating and cooling requirements. This unit is designed to tackle extreme weather conditions and is often favored for industrial applications. The W70A1 employs advanced heat exchanger technology, improving efficiency and reducing energy loss. Moreover, its rugged design enables operation in harsh environments without compromising performance.

Lastly, the W60A1 represents a harmonious blend of efficiency and power. It is particularly well-suited for mid-sized applications, combining the best features from the other models. The W60A1 integrates sophisticated microprocessor controls that optimize performance while ensuring compatibility with emerging smart technology platforms. Its energy-efficient design means lower operating costs while delivering impressive comfort levels.

In summary, Bard's W24L1, W48L1, W42L1, W70A1, and W60A1 models are engineered to deliver superior heating and cooling solutions across a variety of environments. With a focus on energy efficiency, advanced technologies, and user-friendly interfaces, these models exemplify Bard's commitment to innovation and sustainability in climate control systems.
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