c.Regulate flow to condenser with a supply line valve. If pump is a non-overloading type, the valve may be fully closed while pump is running. For average scale deposit, allow solution to remain in condenser over- night. For heavy scale deposit, allow 24 hours.

d.Drain condenser and flush with clean water.

(1607 kPa) for R-407C units. Charge to a clear sight glass.

90MU004 UNITS R--22

Figure 10 Forced Circulation Method

5.9Refrigerant Charging

90MA/MF --These units are shipped with a full operating charge. If recharging is necessary (complete charge lost), weigh in amount of refrigerant indicated on unit nameplate and in Table 1, Table 3 or Table 2.

If unit has partial charge, it must be recharged by removing existing charge and recharging by weighing in the required amount of refrigerant.

90MU004 & 006 --These units, used with remote condensers, are shipped with a holding charge only. To charge:

a. Open discharge and liquid service valves. b. Leak test, reclaim refrigerant and evacuate.

c. Using standard refrigerant charging techniques and charging charts (Figure 11) add refrigerant as re- quired to maintain proper operating conditions.

90MU008 & 012 --These units, used with remote condensers, are shipped with a holding charge only. To charge:

a. Open discharge line, liquid line, compressor dis- charge and compressor suction service valves.

b. Leak test, reclaim refrigerant and evacuate.

c.Add sufficient refrigerant vapor to permit continuous operation after starting unit.

d.Start unit. Using standard charging techniques, add refrigerant as required to maintain normal operating conditions. Use charging chart supplied with con- denser, if available. If information is not available, block off enough of condenser or set water regulating valve as applicable to maintain a discharge pressure of 220 psig (1517 kPa) for R-22 units or 233 psig

90MU006 UNITS R--22

90MU004 UNITS R--407C

 

2758

-- PSIG

400

 

 

(TEA = TEMPERATURE, ENTERING AIR)

-- kPa

 

 

 

 

 

TEA120F/49C

2620

380

 

 

 

 

 

 

PRESS

2482

PRESS

360

 

 

 

 

 

TEA110F/43C

2344

340

 

 

 

 

 

DISCHARGE

2206

DISCHARGE

320

 

 

 

 

 

TEA100F/38C

2069

300

 

 

 

 

 

TEA90F/32C

1930

280

 

 

 

 

 

 

 

 

 

 

TEA80F/27C

1793

260

 

 

 

 

 

COMPRESSOR

1655

COMPRESSOR

240

 

 

 

 

 

TEA70F/21C

1517

220

 

 

 

 

 

TEA60F/16C

1379

200

 

 

 

 

 

 

1241

180

 

 

 

 

 

 

 

 

 

70

75

80

85

90

95

100PSIG

 

 

 

483 517

552

587

622

655

690kPa

COMPRESSOR SUCTION PRESSURE

90MU006 UNITS R--407C

 

 

 

 

2758

-- PSIG

400

 

 

(TEA = TEMPERATURE, ENTERING AIR)

-- kPa

 

 

 

 

 

TEA110F/43C

2620

380

 

 

 

 

 

PRESS

2482

PRESS

360

 

 

 

 

 

TEA100F/38C

2344

340

 

 

 

 

 

DISCHARGE

2206

DISCHARGE

320

 

 

 

 

 

TEA90F/32C

2069

300

 

 

 

 

 

1930

280

 

 

 

 

 

TEA80F/27C

1793

260

 

 

 

 

 

COMPRESSOR

1655

COMPRESSOR

240

 

 

 

 

 

TEA70F/21C

1517

220

 

 

 

 

 

 

 

 

 

 

TEA60F/16C

1379

200

 

 

 

 

 

1241

180

75

80

85

90

95

100PSIG

 

 

 

70

 

 

 

483 517

552

587

622

655

690kPa

 

 

 

 

COMPRESSOR SUCTION PRESSURE

Figure 11 Charging Charts

11

62--10458--00

Page 17
Image 17
Carrier 90MA/MF/MU manual Forced Circulation Method Refrigerant Charging

90MA/MF/MU specifications

The Carrier 90MA/MF/MU series represents a significant advancement in HVAC technology, designed for commercial applications needing reliability, efficiency, and precision in climate control. These units are renowned for their ability to cater to varying thermal loads while minimizing energy consumption, making them an ideal choice for various settings including offices, retail spaces, and industrial facilities.

One of the standout features of the Carrier 90MA/MF/MU series is its impressive energy efficiency. The equipment is designed with advanced thermodynamic principles to ensure maximum heat transfer and minimal energy loss. With high Seasonal Energy Efficiency Ratios (SEER) and Energy Efficiency Ratios (EER), these units help building owners achieve higher energy savings compared to traditional HVAC systems.

Another significant characteristic of the 90MA/MF/MU series is the integration of advanced control technologies. The units come equipped with sophisticated microprocessor-based controls that allow for precise temperature management and enhance overall system performance. Features like modulating capabilities and variable speed fans provide superior comfort levels by continuously adjusting to the changing environmental conditions.

The 90MA series also emphasizes quiet operation, which is critical for commercial environments. The innovative design includes insulation and vibration dampening technologies that reduce noise levels, ensuring a comfortable working atmosphere.

Durability and reliability are also central to the design of the Carrier 90MA/MF/MU series. These units are engineered with high-quality materials and components, including robust compressors and corrosion-resistant finishes that withstand harsh weather conditions. This durability extends the lifespan of the units, thus reducing maintenance costs and downtime.

In terms of versatility, the 90MA/MF/MU series offers a broad range of configurations and options, including various sizes and capacities. This flexibility allows for tailored solutions that meet the specific needs of different applications, from large commercial buildings to smaller retail outlets.

The series also supports environmentally friendly refrigerants that comply with global standards, marking Carrier’s commitment to sustainable practices. This approach not only reduces environmental impact but also positions businesses favorably in the eyes of eco-conscious consumers.

Overall, the Carrier 90MA/MF/MU series stands out as a pinnacle of efficiency, performance, and reliability in the commercial HVAC market. Its advanced technologies and thoughtful design cater to the diverse needs of modern businesses while promoting a sustainable and comfortable indoor environment.