Fig. 2 — Installing Fittings and Valves, 30HX (Typical)

30GXN,R UNITS ONLY — Using good brazing practice, braze the 5/8-in. minimum load tubing to the copper nipple on the discharge line (minimum load port) between the condenser coil and oil separator. See Fig. 1, 3A and 3B.

Step 3 — Dehydrate and Recharge Circuit —

When piping has been completed, leak test the assembly. If one of the O-ring seal fittings leaks, slowly tighten the O-ring nut until the leak stops. If this does not fix the leak, the connec- tion must be reinstalled using a new O-ring in the fitting. Con- tact your Carrier representative for assistance in locating these parts.

After leak testing, evacuate, dehydrate, and recharge the cir- cuit using an approved refrigerant recovery device. Correct type and amount of refrigerant are listed on unit nameplate and in base unit documentation.

Step 4 — Install Control Wiring

Be sure all power to the unit is off before proceeding. Lock out and safety-tag all disconnects.

Wires between field-installed components and unit control box must be enclosed in field-supplied conduit. Follow all local

codes and NEC (National Electrical Code, U.S.A.). Wire size must be no. 16 AWG (American Wire Gage) (1.5 mm2) mini- mum. See Fig. 4 and 5 for field wiring.

30HX UNITS — Remove the screws holding the right-side access panel to the unit control box. Open the right-side access panel.

Route wires through field-supplied conduit and attach the conduit to the unit control box, using a suitable conduit fitting and one of the available 7/8-in. knockout openings. Attach the other end of the conduit to the solenoid valve, using a suitable fitting. Repeat for the other circuit. See Fig. 4.

30GXN,R UNITS —Route the field-supplied water proof con- duit from the solenoid valves to the control box at the end of the unit. See Fig. 4 and 5.

ALL UNITS — Using good wiring practice, connect a white wire from the solenoid valve on circuit A to a white wire from the solenoid valve on circuit B. Connect both wires to TB2-9 (30HX) or TB4-2 (30GX).

Connect a pink wire to the solenoid valve on circuit A.

Connect a gray wire to the solenoid valve on circuit B. Con- nect both the pink and gray wires to TB5-9 for all units.

Figure 4 shows the correct location of the wiring connection points on the chiller.

3

Page 2 Page 4
Page 3
Image 3
Carrier 30GXN, R080-528 installation instructions Dehydrate and Recharge Circuit, Install Control Wiring
Page 2 Page 4

30GXN, R080-528 specifications

The Carrier R080-528,30GXN is a cutting-edge rooftop air conditioning unit from Carrier, a pioneer in HVAC technology. This model is designed for commercial use, providing reliable and efficient cooling solutions for various applications. With a strong emphasis on performance, durability, and energy efficiency, the R080-528,30GXN has become a preferred choice for businesses seeking comfort without excessive energy costs.

One of the standout features of the R080-528,30GXN is its robust cooling capacity, making it suitable for medium to large-sized commercial spaces. The unit integrates advanced scroll compressor technology that ensures consistent performance while minimizing energy consumption. This compressor design not only enhances efficiency but also extends the lifespan of the equipment.

In terms of energy efficiency, the R080-528,30GXN is equipped with an innovative high-efficiency coil system. This aids in maximizing heat exchange while decreasing energy use. The unit also meets or exceeds local energy efficiency standards, making it an environmentally responsible choice for business owners.

The Carrier R080-528,30GXN is built with advanced controls and smart technology. It offers a user-friendly digital thermostat, enabling precise temperature management and programmable settings. The built-in diagnostics further simplify maintenance and troubleshooting, allowing for proactive management of the system and reducing downtime.

The installation of the R080-528,30GXN is streamlined thanks to its flexible design, allowing for curb mounting on rooftops. Its compact structure ensures that it can fit into tight spaces without compromising performance. The unit also features durable construction, with corrosion-resistant materials, ensuring it withstands harsh weather conditions and requires minimal maintenance.

Among its standout characteristics are low sound levels, which enhance the comfort of occupants. The R080-528 is designed with sound attenuation features that significantly reduce operational noise, making it an ideal choice for locations where noise is a concern, such as office buildings and educational facilities.

In summary, the Carrier R080-528,30GXN combines powerful cooling capabilities with advanced technologies, energy efficiency, and user-friendly features. Its robust design, smart controls, and quiet operation make it an excellent solution for commercial air conditioning needs, offering long-term comfort and reliability for businesses.
Top Page Image Contents