Step 2 Ð Rig and Mount Unit

MOUNTING ON GROUND Ð Mount unit on a solid, level concrete pad. Position unit so water or ice from roof does not fall directly into unit. Field-fabricated stacking kits can be used when units are to be stacked. If conditions or local codes require unit to be fastened to a pad, 6 ®eld-supplied tiedown bolts should be used and fastened through slots pro- vided in unit mounting feet.

MOUNTING ON ROOF Ð Mount unit on level platform or frame at least 6 in. (154 mm) above roof surface. Isolate unit and tubing from structure.

RIGGING

Be sure unit panels are securely in place prior to rigging.

Keep unit upright. Lift unit using sling. Use cardboard or padding under sling, and spreader bars to prevent sling dam- age to unit. See Fig. 3. See Fig. 2 for center of gravity ref- erence. Install unit so coil does not face into prevailing winds. If this is not possible and constant winds above 25 mph are expected, use ®eld-fabricated wind baffle.

NOTE: Field-fabricated wind baffles should be used on all units with accessory low-ambient control.

Field-fabricated snow stand may be used to raise unit when operation will be required during the winter. Units may also be wall mounted using the accessory wall mounting kit.

Step 3 Ð Complete Refrigerant Piping Connec-

tions Ð Outdoor units may be connected to indoor units using ®eld-supplied tubing of refrigerant grade and condi- tion. See Tables 1A and 1B for correct line sizes. Do not use less than 10 ft (3 m) of interconnecting tubing.

DO NOT BURY MORE THAN 36 IN. (922 mm) OF REFRIGERANT PIPE IN THE GROUND. If any sec- tion of pipe is buried, there must be a 6 in. (154 m) ver- tical rise to the valve connections on the outdoor unit. If more than the recommended length is buried, refrig- erant may migrate to the cooler, buried section during extended periods of system shutdown. This causes refrigerant slugging and could damage compressor at start-up.

When more than 50 ft (15.2 m) of interconnecting tubing and more than 30 ft (9.1 m) of vertical lift is used, refer to Part 3 of the Carrier System Design Manual for design de- tails, or contact your local distributor.

If either refrigerant tubing or indoor coil is exposed to at- mospheric conditions for longer than 5 minutes, it must be evacuated to 1000 microns to eliminate contamination and moisture in the system.

Run refrigerant tubes as directly as possible, avoiding un- necessary turns and bends. Suspend refrigerant tubes so they do not damage insulation on vapor tube and do not transmit vibration to the structure. Also, when passing refrigerant tubes through the wall, seal opening so that vibration is not trans- mitted to structure. Leave some slack in refrigerant tubes be- tween structure and outdoor unit to absorb vibration. Refer to separate indoor unit installation instructions for addi- tional information.

CHECK ACCURATER CONTROL Ð The correct AccuRater (bypass type) refrigerant control is required for cooling system capacity optimization. An AccuRater device

Fig. 3 Ð Lifting Unit with Sling

with ®eld-replaceable piston should be supplied with the in- door unit. Refer to AccuRater metering device table in sepa- rate indoor unit installation instructions to determine the correct AccuRater piston size required for the condenser/evaporator system being installed.

Note that one of 2 types of the AccuRater devices can be found on the indoor unit. See Fig. 4. Do not interchange com- ponents between AccuRater device types. Matching of out- door unit with indoor unit may require ®eld replacement of piston. Replace piston, if required, before connecting refrig- erant lines. Piston replacement instructions are included in the indoor unit installation instructions. After system in- stallation is complete, see Refrigerant charging section on page 8 to check and/or adjust refrigerant charge.

The 38HDL018-060 units may also be installed with units using a thermostatic expansion valve (TXV). If a TXV is used, be sure to remove the piston from the indoor coil. See installation instructions shipped with the TXV for proper po- sitioning and adjustment.

TYPE A (BYPASS TYPE)

TYPE B

NOTE: Arrow on AccuRater body points in free-¯ow direction, away from the indoor coil.

Fig. 4 Ð AccuRater Metering Device Components

MAKE PIPING SWEAT CONNECTIONS Ð Remove plas- tic caps from liquid and suction service valves. Use refrig- erant grade tubing. Service valves are closed from the fac- tory and ready for brazing. After wrapping the service valve

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Carrier 38HDL018-060 specifications Rig and Mount Unit, Complete Refrigerant Piping Connec
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38HDL018-060 specifications

The Carrier 38HDL018-060 is a prominent model in the world of commercial HVAC solutions, offering exceptional performance, efficiency, and reliability for a variety of applications, including offices, retail spaces, and industrial environments. With a range of capacities from 1.5 tons to 5 tons, the 38HDL series serves diverse heating and cooling needs, making it a versatile option for many building types.

One of the standout features of the Carrier 38HDL018-060 is its advanced Scroll compressor technology. This technology is known for its energy efficiency and quieter operation compared to traditional reciprocating compressors. By optimizing the refrigeration cycle, the Scroll compressor enhances the overall system performance, providing consistent temperature control while minimizing energy consumption.

The unit also incorporates a vertical air discharge design, allowing for flexible installation and improved airflow distribution. This design minimizes air stratification, ensuring that conditioned air reaches every corner of the space effectively. Furthermore, the 38HDL series is equipped with a reliable multi-speed fan that adapts its operation based on the specific cooling or heating demand, further optimizing energy use and maintaining indoor comfort levels.

In terms of technology, the Carrier 38HDL018-060 features a microprocessor-based control system. This intelligent control allows for precise temperature management and system diagnostics, enabling easier maintenance and ensuring the longevity of the unit. Additionally, the unit can be integrated with Carrier’s advanced building automation systems for streamlined control across larger facilities, further enhancing operational efficiency.

The 38HDL series is also designed with durability in mind. It features a rugged aluminum cabinet that stands up to harsh environmental conditions while providing excellent insulation to improve overall efficiency. The corrosion-resistant coatings contribute to the longevity of the finned coil and other critical components, ensuring reliable performance over time.

Overall, the Carrier 38HDL018-060 exemplifies modern HVAC technology, blending efficiency, durability, and advanced control features to create a solution that meets the demands of today’s commercial buildings. Whether for new construction or retrofitting an existing system, the 38HDL series offers the reliability and performance required to create a comfortable indoor environment.
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