START UP

IMPORTANT INSTALLER NOTE

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

CRANKCASE HEATERS

These units are not provided with crankcase heat. These units utilize scroll compressors which do not require crankcase heat in this application.

HIGH PRESSURE SWITCH

The models are supplied with a remote reset high 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 ZR3 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.

SERVICE HINTS

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

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

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

SEQUENCE OF OPERATION

COOLING – Circuit R-Y makes at thermostat pulling in compressor contactor, starting the compressor and outdoor motor. The G (indoor motor) circuit is automatically completed on any call for cooling operation or can be energized by manual fan switch on subbase of constant air circulation. On all 230 volt units there is a one minute off delay on the blower motor. 460 volt models do not have an off delay.

COMPRESSOR CONTROL MODULE

The compressor control module is standard on the models covered by this manual. The compressor control is an anti-short cycle/lockout timer with high and low pressure switch monitoring and alarm relay output.

Adjustable Delay On Make And Break Timer

On initial power up or any time power is interrupted to the unit the delay on make period begins which will be 2 minutes plus 10% of the delay on break setting. When the delay on make is complete and the high pressure switch (and low pressure switch if employed) is closed, the compressor contactor is energized. Upon shutdown the delay or break timer starts and prevents restart until the delay on break and delay on make periods have expired.

During routine operation of the unit with no power interruptions the compressor will operate on demand with no delay.

Manual 2100-348 Page 15

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Bard WA6022, WA6023, WA602N, WA4823, WA4822 installation instructions Start UP
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WA4822, WA4823, WA6022, WA602N, WA6023 specifications

Bard is a renowned name in the HVAC industry, and their models WA4823, WA4822, WA602N, WA6022, and WA6023 reflect a commitment to providing efficient and reliable heating and cooling solutions. Each model is designed with specific features and technologies that cater to varying needs, making them suitable for residential and commercial applications.

The WA4823 and WA4822 are part of Bard's high-efficiency wall-mounted air conditioning units, engineered to maximize comfort while minimizing energy consumption. The WA4823 offers a cooling capacity of 23,000 BTUs, making it ideal for larger spaces. Its unique design includes a high-efficiency scroll compressor and a multi-speed fan that adjusts airflow according to the needs of the environment. This model also features a built-in thermostat and an easy-access filter, ensuring optimal air quality and minimal maintenance.

The WA4822, slightly smaller with a cooling capacity of 22,000 BTUs, shares many features with the WA4823. Both units are equipped with a robust insulation system that significantly reduces sound levels, providing a quiet and comfortable indoor environment. Additionally, they utilize eco-friendly refrigerants, contributing to lower greenhouse gas emissions.

The WA602N, WA6022, and WA6023 models are designed for larger applications, offering advanced cooling solutions. The WA602N is particularly noteworthy for its patented technology that enhances energy efficiency while delivering powerful cooling performance. With a cooling capacity of 6,000 BTUs, it features a durable exterior designed to withstand outdoor elements, making it suitable for external installations.

The WA6022 and WA6023 offer slightly higher capacities, catering to larger spaces with demands for cooling. Both models come equipped with advanced climate control technologies, including programmable thermostats and energy-saving modes that adjust the system's operation based on occupancy. These features not only optimize comfort but also provide significant savings on energy bills.

In summary, Bard's WA4823, WA4822, WA602N, WA6022, and WA6023 models stand out for their efficiency, advanced technology, and user-friendly features. Their design emphasizes quiet operation, eco-friendly refrigerants, and robust construction, making them reliable choices for both residential and commercial environments. With a strong focus on energy conservation and comfort, Bard's units are shaping the future of HVAC solutions.
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