START UP AND OPERATION

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 ZR*3 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 terminals should maintain proper rotation direction.

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

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 for constant air circulation.

HEATING – A circuit R-W1 is completed on each heating cycle energizing electric heat if so equipped.

START UP NOTES

For improved start up performance, wash the indoor coil with dishwasher detergent

COMPRESSOR CONTROL MODULE

The compressor control is an anti-short cycle/lockout timer with high and low pressure switch monitoring and alarm output.

ADJUSTABLE DELAY-ON-MAKE AND BREAK TIMER

On a call for compressor operation the delay-on-makeperiod begins which will be 10% of the delay-on-breaksetting. 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-on-break timer starts and prevents restart until the delay-on-break and delay-on-make periods have expired.

HIGH PRESSURE SWITCH AND LOCKOUT SEQUENCE (Standard Feature)

If the high pressure switch opens, the compressor contactor will de-energize immediately. The lockout timer will go into a soft lockout and stay in soft lockout until the high pressure switch closes and the delay-on-make time has expired. If the high pressure switch opens again in this same operating cycle the unit will go into manual lockout condition and the alarm circuit will energize. Recycling the wall thermostat resets the manual lockout.

LOW PRESSURE SWITCH, BYPASS, AND LOCKOUT SEQUENCE

NOTE: The low pressure switch is an optional control and the bypass and lockout sequence are part of the standard compressor control module.

If the low pressure switch opens for more that 120 seconds, the compressor contactor will de-energize and go into a soft lockout. Regardless the state of the low pressure switch, the contactor will reenergize after the delay-on-make time delay has expired. If the low pressure switch remains open or opens again for longer than 120 seconds the unit will go into manual lockout condition and the alarm circuit will energize. Recycling the wall thermostat resets the manual lockout.

Manual 2100-324 Page 12

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Bard P1060A1, P1148A1 Start UP and Operation, Three Phase Scroll Compressor Start UP Information, Sequence of Operation
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P1060A1, P1142A3, P1148A1 specifications

Bard P1148A1, P1142A3, and P1060A1 are high-performance vascular access products designed to meet the diverse needs of medical professionals in various healthcare settings. These devices, developed by Bard, are renowned for their innovative technologies and superior characteristics that enhance patient care and facilitate clinical procedures.

The Bard P1148A1 is a peripherally inserted central catheter (PICC) designed for long-term intravenous therapy, including chemotherapy and antibiotics. Its key features include a strong yet flexible design that allows for easy insertion and maintenance of the catheter over extended periods. The P1148A1 utilizes advanced materials that minimize the risk of thrombosis and infection, pivotal considerations in central line management. The catheter is equipped with a specialized tip configuration that promotes optimal blood flow and reduces complications.

Moving to the Bard P1142A3, this device serves a similar purpose but incorporates unique technologies that enhance its usability. The P1142A3 boasts a hydrophilic coating which facilitates smoother insertions and reduces friction during catheter placements. This is particularly valuable in pediatric and geriatric populations, where gentler approaches are essential. Additionally, the P1142A3 is engineered with multiple lumens, allowing simultaneous administration of fluids, medications, and blood products. This multipurpose functionality enhances efficiency in clinical settings, reducing the need for multiple venipunctures.

On the other hand, the Bard P1060A1 is designed with a focus on short-term vascular access. This catheter is particularly effective for emergency situations and critical care, offering rapid placement and reliable performance. One of its main characteristics is a streamlined design that minimizes the overall footprint, making it an ideal choice for patients with limited vein access. The P1060A1 is also equipped with a safety mechanism that reduces the risk of accidental needlesticks, addressing a critical safety concern in medical environments.

Overall, Bard's P1148A1, P1142A3, and P1060A1 products exemplify innovation in vascular access technology. With features designed to enhance insertion techniques, improve patient outcomes, and ensure safety in healthcare settings, these catheters stand as key tools in modern medical practice. Their robust design and advanced materials align with the needs of both healthcare providers and patients, making them essential components of effective vascular access strategies.
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