Carrier HXC076-186 30HXA System Charge for Start-Up, Unit Circuit a Circuit B Charge 30HXA

Page 27

30HXC UNITS Ð The 30HXC units are shipped from the factory with a full charge of R-134a. Unit should not need to be charged at installation unless a leak was detected in Step 6 Ð Leak Test Unit section on page 26. If dehydration and recharging is necessary, use industry standard practices or refer to Carrier Standard Services Techniques Manual as required.

30HXA UNITS Ð The 30HXA units are shipped with a hold- ing charge of R-134a. The complete charge for the 30HXA, the remote condenser(s), and interconnecting piping must be ®eld supplied.

To charge the 30HXA systems:

1.Add liquid charge into the cooler using the 1¤4-in. Schrader- type ®tting located on the tube going into the bottom of the cooler. This ®tting is located between the elec- tronic expansion valve (EXV) (076-146 units) or the economizer (161-186 units) and the cooler. Add approxi- mately 2 lb/nominal ton (0.9 kg/nominal kW). This amount of charge should be sufficient to allow the unit to start. The approximate system charges are shown in Table 6.

2.Raise the compressor discharge to approximately 125 F (51.7 C) saturated discharge temperature (185 psig [1276 kPa]) by throttling the condenser air (or water) in- take. Add charge until there is approximately 18 to 20 F (10.0 to 11.1 C) of system subcooling (saturated dis- charge temperature − actual temperature entering the EXV).

NOTE: On the units equipped with economizers (30HXA161-186), the EXV is located inside the econo- mizer so the temperature must be measured entering the economizer (tube entering bottom of economizer).

3.Check for a clear sight glass. If the unit is not fully loaded, the sight glass might be ¯ashing. This is normal for a partially-loaded unit.

Table 6 Ð 30HXA System Charge for

Start-Up

UNIT

CIRCUIT A

CIRCUIT B

CHARGE

CHARGE

30HXA

Lb

Kg

Lb

Kg

 

076

75

34.0

75

34.0

086

94

42.6

80

36.3

096

114

51.7

80

36.3

106

134

60.8

80

36.3

116

137

62.1

95

43.1

126

137

62.1

116

52.6

136

147

66.7

125

56.7

146

161

73.0

132

59.9

161

190

86.2

132

59.9

171

154

69.9

186

84.4

186

186

84.4

186

84.4

27

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Contents Installation Instructions Base Unit Dimensions, 30HXC076-146 Units Base Unit Dimensions, 30HXC161-186 Units Base Unit Dimensions, 30HXA076-146 Units Base Unit Dimensions, 30HXA161-186 Units Unit Mounting Plate no 30HXA Unit Mounting Plate no 30HXCÐ Physical Data, English Ð Physical Data, SI Page Page Saturated Pressure Discharge Temp Discharge Line 2 F 1.1 C Drop Saturated Temperature ExampleSaturated Pressure Liquid Temp 134a Psig KPa 100 37.7 124.3 857 195.936.7 120.1 828 190.2 R-134a Discharge Line Sizing, 30HXA Units Page Voltage Power Circuit Control Circuit ICF Unit Ð Unit Electrical Data, 30HXC UnitsMCA Mocp 208/230 460 575 380 346²² 380/415 Ð Unit Electrical Data, 30HXC Units*MCA RLAÐ Unit Electrical Data, 30HXA Units Ð Unit Electrical Data, 30HXA Units* Ð Compressor Electrical Data, 30HXC Units Unit Size Nameplate Compressor Numbers 30HXCRLA LRA 161-WD 126-WD136-WD 146-WD186-WD Unit Size Nameplate Compressor Numbers 30HXA Ð Compressor Electrical Data, 30HXA Units460-60 115.4 820 94.8 685 NEC EquipCwfs ALMCCN CommInstall Accessories Unit Circuit a Circuit B Charge 30HXA 30HXA System Charge for Start-UpPackaged Service Training

30HXA, HXC076-186 specifications

The Carrier 30HXA and 30HXC series is a notable line of chillers designed for commercial applications, providing advanced cooling solutions for various buildings and infrastructures. These models are known for their reliability and efficiency, making them a preferred choice for building managers and facilities engineers.

One of the key features of the Carrier 30HXA and 30HXC series is their use of high-efficiency, variable-speed scroll compressors. This technology allows the chillers to adjust their cooling output based on the actual demand, resulting in significant energy savings, especially during periods of partial load. This responsiveness not only leads to lower operational costs but also reduces wear and tear on the equipment, extending its lifespan.

Another critical aspect of these chillers is their eco-friendly refrigerant options. The 30HXA and 30HXC models utilize R-410A refrigerant, which has a lower environmental impact compared to traditional refrigerants. This commitment to sustainability aligns with modern regulations and climate goals, making these chillers an environmentally responsible choice.

Both series offer a wide range of cooling capacities, from 76,000 to 186,000 BTU/h, catering to various commercial needs. The compact design and modular configurations of these chillers allow for easy installation and integration into existing systems, facilitating retrofits and upgrades without significant disruption.

The 30HXA and 30HXC chillers also feature advanced controls that enhance their operational efficiency. The integrated controls allow for easy monitoring and adjustments, enabling users to optimize performance and minimize energy consumption. Additionally, they can easily interface with building management systems (BMS), providing real-time data and improved operational insights.

Durability is another hallmark of the Carrier 30HXA and 30HXC series. Built with corrosion-resistant materials and designed to withstand harsh weather conditions, these chillers ensure reliable performance in various environments. The robust construction further enhances their longevity, providing consistent cooling solutions for years.

In summary, the Carrier 30HXA and 30HXC series chillers offer advanced technology, eco-friendly refrigerants, energy efficiency through variable-speed compressors, and durable construction. These features come together to provide a reliable and effective cooling solution for a wide range of commercial applications, ensuring comfort and performance while supporting sustainability goals.
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