LEGEND

 

 

C

Ð Contactor

GCS

Ð Ground Current Sensor

SW

Ð Switch

CB

Ð Circuit Breaker

GND

Ð Ground

TB

Ð Terminal Block

CM

Ð Control Module

NC

Ð Normally Closed

TDR

Ð Time Delay Relay

COM

Ð Common

NEUT

Ð Neutral

THERM Ð Termistor

CR

Ð Control Relay

NO

Ð Normally Open

TRAN

Ð Transformer

Fig. 20 Ð 30HW Control Box Components Label

PRE-START-UP

IMPORTANT: Before beginning Start-Up, complete Start-Up Checklist on pages CL-1 to CL-4. This check- list assures proper start-up of a unit, and provides a record of unit condition, application requirements, sys- tem information, and operation at initial start-up.

ELECTRIC SHOCK HAZARD

Open all disconnects before servicing this equipment. There may be more than one disconnect.

Initial Check

IMPORTANT: Electrical power source must agree with unit nameplate rating. Do not start the chiller, even momentarily, until the following checks have been completed.

1.Check all auxiliary components, such as cooling tower (if used), chilled liquid and condenser water pumps, air- handling equipment, or other equipment to which the chiller supplies liquid. Consult manufacturer's instructions.

2.Be sure ¯ow switch is properly installed and set. See instructions packaged with ¯ow switch accessory.

3.Set the temperature controller deadband as speci®ed in Tables 5 and 6. Set point should be at the desired cooler leaving ¯uid temperature. Refer to Chilled Fluid Tem- perature Controller section on page 29 for additional dead- band setting information.

4.Backseat (open) compressor suction and discharge shut- off valves. Crack open valves (one turn in) to allow some pressure to each test gage (if installed).

5.Backseat (open) liquid line shutoff valve(s).

6.Open valve to capillaries from ¯uid regulating valve (when used).

7.Fill chilled ¯uid liquid circuit with clean water or other noncorrosive ¯uid to be cooled. Bleed all air out of the high points of the system. Set ¯ow rate according to job requirements. See Table 3. If the chilled water is to be maintained at a temperature below 40 F (4.4 C), a brine of sufficient concentration must be used to prevent freeze-up at anticipated suction temperatures.

8.Open supply valve (or ®ll cooling tower, if used) for condenser water.

9.Check tightness of all electrical connections.

25

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Carrier 30HL050, 30HW018-040, 30HK040-060 specifications Pre-Start-Up, Initial Check, Electric Shock Hazard, Neut
Page 24 Page 26

30HK040-060, 060, 30HL050, 30HW018-040 specifications

The Carrier 30HW018-040, 30HL050, 060, and 30HK040-060 series represents a range of advanced rooftop units designed to meet the diverse heating and cooling needs of commercial buildings. Renowned for their efficiency and performance, these units incorporate cutting-edge technologies to improve operational effectiveness and reduce energy consumption.

One of the standout features of the Carrier 30HW series is its high-efficiency scroll compressors, which are engineered to provide exceptional cooling capacity while minimizing energy usage. These compressors operate quietly and ensure smooth performance across varying loads. Additionally, the units utilize advanced microprocessor controls that enhance system efficiency by enabling precise temperature regulation and optimizing energy consumption based on real-time weather conditions.

Another important aspect of the 30HL series is its ability to provide reliable heating and cooling capabilities even in extreme weather conditions. With robust heat exchangers and a range of variable-speed fans, these units can efficiently circulate air while maintaining optimal indoor comfort levels. Variable-speed technology not only enhances comfort but also improves energy savings, as the system can adjust its output based on occupancy and external temperature fluctuations.

The 30HK series, specifically designed for high-performance applications, features enhanced filtration systems which improve indoor air quality. These systems are capable of accommodating various filter types, ensuring that airborne contaminants are effectively captured. This makes the 30HK a suitable choice for environments where air quality is a priority, such as schools, hospitals, and commercial offices.

Moreover, all units in the 30HW, 30HL, and 30HK series are designed with ease of maintenance in mind. Removable panels and easy access points allow for quick servicing and reduces downtime. The compact design also ensures that installation is straightforward, making them a preferred choice for many contractors.

In summary, Carrier's 30HW018-040, 30HL050, 060, and 30HK040-060 series are integral solutions in the HVAC market, combining energy efficiency, advanced controls, and superior air quality features. These rooftop units are tailored for commercial applications, providing reliable heating and cooling solutions while prioritizing comfort and sustainability. Through continuous innovation, Carrier remains at the forefront of HVAC technology, ensuring that their products meet the evolving demands of the industry.
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