Maintenance, C00030, C00032, C00031

				(042) 60HZ CHARGING CHART	OUTDOOR TEMP
				(042) 60HZ CHARGING CHART	° F	° C
					° F	° C
	689	100			125	52
					125	52
					115	46
PRESSURE (KILOPASCALS)					105	41
	620	LINE PRESSURE (PSIG)	90		95	35
					95	35
					85	29
	551		80		75	24
					65	18
	483		70		55	13
	483		70
					45	7

SUCTION LINE	414	SUCTION	60
	345		50

	276		40
	207		30

20.0	30.0	40.0	50.0	60.0	70.0	80.0
	SUCTION LINE TEMPERATURE (°F)

-7	-1	4	10	16	21	27
	SUCTION LINE TEMPERATURE (°C)					50JS500091

C00030

Fig. 27ÐCooling Charging Chart, 50JS 042 Units

				(060) 60HZ CHARGING CHART	OUTDOOR TEMP
				(060) 60HZ CHARGING CHART	° F	° C
					° F	° C
	689	100
PRESSURE (KILOPASCALS)					125	52
	620		90		115	46
	620	LINE PRESSURE (PSIG)	90		105	41
					95	35
					85	29
	551		80		75	24
					75	24
					65	18
	483		70		55	13
					45	7

SUCTION LINE	414	SUCTION	60
	345		50

	276		40
	207		30

20.0	30.0	40.0	50.0	60.0	70.0	80.0
	SUCTION LINE TEMPERATURE (°F)

-7	-1	4	10	16	21	27
	SUCTION LINE TEMPERATURE (°C)					50JS500093

C00032

Fig. 29ÐCooling Charging Chart, 50JS 060 Units

To change the speed of the blower motor (BM), remove the fan motor speed leg lead from the blower relay (BR). This wire is attached to IGC terminal BM for single-phase and 3-phase units. To change the speed, remove and replace with lead for desired blower motor speed. Insulate the removed lead to avoid contact with chassis parts.

For 460-v GE MotorsÐThe motor leads are color coded as follows:

3-SPEED Black = high Violet = jumper Orange = medium Red = low

				(048) 60HZ CHARGING CHART	OUTDOOR TEMP
				(048) 60HZ CHARGING CHART	° F	° C
					° F	° C
	689	100			125	52
					125	52
PRESSURE (KILOPASCALS)					115	46
	620		90		105	41
	620	LINE PRESSURE (PSIG)	90		95	35
					95	35
					85	29
	551		80		75	24
					75	24
	483		70		65	18
					55	13

SUCTION LINE	414	SUCTION	60		45	7
					45	7
	345		50

	276		40
	207		30

20.0	30.0	40.0	50.0	60.0	70.0	80.0
	SUCTION LINE TEMPERATURE (°F)

-7	-1	4	10	16	21	27
	SUCTION LINE TEMPERATURE (°C)					50JS500092

C00031

Fig. 28ÐCooling Charging Chart, 50JS 048 Units

To change the speed of the blower motor (BM), remove fan motor speed lead from the blower relay (BR) and replace with the lead for the desired blower motor speed. The motor speed lead is attached to terminal BM. For low and medium speeds black must be connected to the jumper wire. Insulate removed lead end to avoid contact with chassis parts. To select high speed on 460-v GE motors, separate the black female quick connect (QC) from the jumper lead male quick connect (QC) and connect the black lead to the BR. Insulate the jumper to avoid contact with any chassis parts.

MAINTENANCE

To ensure continuing high performance, and to minimize the possibility of premature equipment failure, periodic maintenance must be performed on this equipment. This heat pump unit should be inspected at least once each year by a qualified service person. To troubleshoot unit, refer to Table 5.

NOTE TO EQUIPMENT OWNER: Consult your local dealer about the availability of a maintenance contract.

The ability to properly perform maintenance on this equip- ment requires certain expertise, mechanical skills, tools and equipment. If you do not possess these, do not attempt to perform any maintenance on this equipment, other than those procedures recommended in the User's Manual. FAILURE TO HEED THIS WARNING COULD RESULT IN SERI- OUS INJURY OR DEATH AND POSSIBLE DAMAGE TO THIS EQUIPMENT.

50JS specifications

The Carrier 50JS is a high-performance rooftop unit designed for commercial applications, combining advanced technology with energy efficiency to deliver optimal heating and cooling performance. Its compact design allows for easy installation, making it an ideal choice for various settings such as retail spaces, schools, and office buildings.

One of the standout features of the Carrier 50JS is its innovative energy efficiency. Equipped with a high-efficiency scroll compressor, it significantly reduces energy consumption while providing reliable climate control. This model boasts a commendable SEER (Seasonal Energy Efficiency Ratio) rating, which translates to lower utility bills and a reduced carbon footprint, meeting modern energy efficiency standards.

The 50JS unit utilizes R-410A refrigerant, an environmentally friendly option that contributes to its low global warming potential compared to traditional refrigerants. This aligns with Carrier's commitment to sustainability and reducing environmental impact.

Another significant characteristic of the 50JS is its advanced controls and intelligent building integration capabilities. The unit comes with a microprocessor-based control system that allows for precise temperature management and can be easily integrated into building automation systems. This feature enhances user experience, providing real-time data and better management of HVAC operations.

Noise reduction technology is also a key design focus of the Carrier 50JS. The unit incorporates sound-attenuating materials and features that minimize operational noise, making it suitable for noise-sensitive environments like offices and educational institutions.

In terms of air quality, the 50JS offers various filtration options, including high-efficiency filters that remove airborne particulates. This results in cleaner, healthier indoor air, which is crucial for occupant comfort and well-being.

Furthermore, the rooftop unit is built to withstand harsh weather conditions, featuring a durable cabinet constructed from galvanized steel with a corrosion-resistant finish. This enhances the unit's longevity and reliability over time.

In conclusion, the Carrier 50JS rooftop unit stands out in the commercial HVAC market due to its energy efficiency, advanced controls, quiet operation, and robust design. It represents a blend of state-of-the-art technology and practical features, making it a preferred choice for those looking to invest in reliable and sustainable climate control solutions.