Bard W48H1 Important Installer Note, High & LOW Pressure Switch, Phase Monitor, Service Hints

Page 16

START UP (Continued)

IMPORTANT INSTALLER NOTE

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

HIGH & LOW PRESSURE SWITCH

All W**H 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 ZP 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 and W60 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

2100-511

Page

16 of 27

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Contents W18H1 W24H1 W30H1 W36H1 W42H1 W48H1 W60H1 Contents Getting Other Information and Publications For More INFORMATION, Contact These PublishersGeneral Shipping DamageHeat Pump Wall Mount Model Nomenclature Duct Work FiltersFresh AIR Intake Condensate DrainWall Mounting Information Mounting the UnitRight Unit Supply ReturnW18H1, W24H1 Mountinginstructions W30H1, W36H1 Mountinginstructions W42H1, W48H1, W60H1 Mountinginstructions Electric Heat Clearance W30H1, W36H1, W42H1, W48H1, W60H1Wall Mounting Instructions Common Wall Mounting Installations Wiring LOW Voltage Wiring Wiring Main PowerTAP Range Safety Practices Topping OFF System ChargeImportant Installer Note High & LOW Pressure SwitchThree Phase Scroll Compressor Start UP Information Phase MonitorSequence of Operation Pressure Service PortsDefrost Cycle Defrost Control Board Solid State Heat Pump Control Troubleshootingprocedure TroubleshootingChecking Temperature Sensor Outside Unit Circuit Temperature F VS. Resistance R of Temperature SensorRemoval of FAN Shroud FAN Blade Setting DimensionsRefrigerant Charge Heating Pressures ALL Temperatures F Cooling Pressure TableElectrical Specifications W**H Series Recommendedairflow Indoor Blower PerformanceTables Maximum ESP of Operation Electric Heat only Electric HeatOptional Accessories Heater Kits Circuit Breaker Wmcb & Pull Disconnect WmpdVent & Control Options W18, W24 W30, W36 W42, W48, W60
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W60H1, W18H1, W48H1, W30H1, W42H1 specifications

The Bard W24H1D, W24H1, W30H1D, W36H1, and W48H1D are advanced wall-mounted heating and cooling units that exemplify efficiency, performance, and adaptability. These models are particularly suited for residential and light commercial applications, providing excellent temperature control in a variety of settings.

One of the distinguishing features of these Bard units is their robust heat pump technology, which offers both heating and cooling capabilities. This dual-functionality enables users to regulate indoor climates effectively throughout different seasons. Bard's heat pumps are designed for high efficiency, helping to reduce energy consumption and lower utility bills while maintaining comfort.

The W24H1D and W24H1 models are suited for spaces requiring moderate heating and cooling, with their compact design allowing for easy installation in tight spaces. They provide a heating capacity of 24,000 BTU and are capable of delivering exceptional performance even in colder climates. The W30H1D, on the other hand, elevates this performance with a slightly higher output of 30,000 BTU, making it ideal for larger areas or environments with intensified temperature control needs.

For larger applications, the W36H1 and W48H1D models stand out with their impressive heating capacities of 36,000 BTU and 48,000 BTU, respectively. These units are engineered to tackle larger installations with ease, ensuring warmth during harsh winters and refreshing cool air in sweltering summers. The robust construction of these models also contributes to their durability and longevity, making them a cost-effective investment over time.

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A standout characteristic of the Bard line is their quiet operation. Utilizing sound-dampening technology, these units are designed to minimize noise levels, making them suitable for residential settings where peace and tranquility are essential.

Moreover, Bard’s commitment to efficiency is evident in the design of these units. They adhere to strict energy efficiency guidelines, including the Energy Efficiency Ratio (EER) and Seasonal Energy Efficiency Ratio (SEER) ratings. This attention to energy efficiency not only benefits the environment but also assures users of lower operational costs.

In summary, the Bard W24H1D, W24H1, W30H1D, W36H1, and W48H1D models provide versatile, efficient heating and cooling solutions suitable for various applications. With their advanced technologies and user-friendly features, these units stand out in the HVAC market, offering reliability and comfort year-round.
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