Step 2 — Install Piping

Shut off all power to the unit, then lock out and safety-tag all disconnects before proceeding with installation.

Remove refrigerant charge from circuits using an ap- proved refrigerant recovery device before proceeding with installation.

NOTE: The units have 2 circuits. Perform all of the following piping installation procedures on both A and B circuits.

REMOVE MINIMUM LOAD PORT PLUGS AND IN- STALL FITTINGS — Plugs must be removed from these ports and replaced with O-ring seal fittings. Note that plugs were factory-installed with Loctitet 554 or equivalent refrigerant-compatible sealant. Fittings should be installed with similar sealant on threads.

30GXN,R — Cut plug end off of minimum load port braze nipple on discharge line, located between oil separator and con- denser. Remove plug from minimum load port on cooler shell. See Fig. 1. Using thread sealant, install O-ring seal fitting in minimum load port on cooler. Port on nipple in discharge line is reserved for a brazed connection.

30HX — Remove plugs from minimum load ports on the cool- er shell and the condenser shell (30HXC) or oil separator (30HXA). See Fig. 2. Using thread sealant, install O-ring seal fittings in minimum load ports.

INSTALL PIPING — On 30GXN,R units, carefully thread the cooler tube assemblies (P/N 30GX503487) on the O-ring seal fittings installed in the cooler port. Do not tighten. Install field- supplied 5/8-in. OD copper tubing between the tube assembly and the brazed nipple on the discharge line.

On 30HX units, carefully thread the cooler tube assemblies (P/N 30GX503487) and the condenser oil separator tube as- sembly (P/N 30HX402343) on the O-ring seal fittings installed in the cooler and condenser/oil separator ports. Do not tighten. Install field-supplied 5/8-in. OD copper tubing between the tube assemblies on the cooler shell and condenser (30HXC) or oil separator (30HXA).

INSTALL BALL AND SOLENOID VALVES — Using good piping practice, braze ball valve and solenoid valve into 5/8-in. minimum load piping. Fig. 2 shows a typical 30HX installation and Fig. 3A and 3B show a typical 30GXN,R installation, in- cluding valve locations and orientation. Ensure that ball valve is fully open, and that both the ball and solenoid valve are pro- tected from excess heat during brazing process. Wrap wet cloths around valve bodies and tube assembly locking nuts during brazing to prevent damage to the valves and O-rings from heat.

CONNECT PIPING — Lubricate O-rings with a light coating of polyalphaolefin lubricant suitable for R-134a systems. Thread tube assembly nuts onto the O-ring seal fittings until they are finger-tight. Lightly snug the nut with a wrench; DO NOT OVER TIGHTEN. You should be able to feel the O- ring compress on the last 1/4-turn.

IMPORTANT: DO NOT over tighten the O-ring seal nut. Damage will occur to the seal, resulting in leaks.

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Fig. 1 — Installing Fittings, 30GXN,R (Typical Size 080-150, 160 Shown)

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Carrier R080-528 installation instructions Install Piping, Installing Fittings, 30GXN,R Typical Size 080-150, 160 Shown
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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.
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