LEGEND

ALM

Ð Alarm

CCN

Ð Carrier Comfort Network

COMM

Ð Communications

CWFS

Ð Chilled Water (Fluid) Flow Switch

CWP

Ð Chilled Water (Fluid) Pump

CWPI

Ð Chilled Water (Fluid) Pump Interlock

EQUIP

Ð Equipment

GND, GRD Ð Ground

NEC

Ð National Electrical Code (U.S.A.)

TB

Ð Terminal Block

 

Field Power Wiring

Field Control Wiring

Factory-Installed Wiring

NOTES:

1.Factory wiring is in accordance with NEC. Field modi®cations or additions must be in compliance with all appli- cable codes.

2.Wiring for main ®eld supply must be rated 75° C minimum. Use copper for all units. Maximum incoming wire size for each terminal block is 500 kcmil.

3.Power for control circuit should be supplied from a separate source through a ®eld-supplied, fused disconnect with 15 amp maximum protection for all control circuits. Connect control circuit power to terminals 1 and 2 of TB4. Connect neutral side of supply to terminal 2 of TB4. Control circuit conductors for all units must be copper only.

4.Terminals 13 and 14 of TB2 are for ®eld external connection for remote on-off. The contacts must be rated for dry circuit application capable of handling a 24 vac to 50 mA load. Remove jumper between 13 and 14 of TB2 if remote on-off is installed.

5.Terminals 11 and 12 of TB2 are for chilled water ¯ow switch (CWFS) and chilled water pump interlock (CWPI) functions. The contacts must be rated for dry circuit application capable of handling a 24 vac to 50 mA load.

6.Terminals 4 and 5 of TB2 are for control of chilled water pump starter. The maximum load allowed for the chilled water pump relay is 125 va sealed, 1250 va inrush.

7.Terminals 2 and 3 of TB2 are for alarm. The maximum load allowed for the alarm is 125 va sealed, 1250 va inrush.

Fig. 13 Ð Field Control Wiring

25

Page 25
Image 25
Carrier 30HXA, HXC076-186 installation instructions Alm, Ccn, Comm, Cwfs, Cwpi

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.