Units with Factory-Installed Disconnect — The factory- installed disconnect is an interlocking, door-type. The discon- nect handle locks the door when it is in the ON position. The disconnect handle must be in the OFF position to open the con- trol box door. The disconnect is located in a separate control box behind the control box door for all units. See Fig. 43.

All field wiring must comply with NEC and all local codes. Wire must be sized based on MCA (Minimum Circuit Amps) on the unit informative plate. See Fig. 44 for power wiring con- nections to the unit disconnect and equipment ground.

DISCONNECT SIZE

QUANTITY...MAXIMUM WIRE SIZE

(MCM)

 

200 Amps

1...300

400 Amps

1...600

600 Amps

2...600

Operating Voltage — Operating voltage to the compressor must be within the voltage range indicated on the unit name- plate. Voltages between phases must be balanced within 2%, and the current must be balanced within 10%. See Tables 7-16 for unit electrical data.

Use the following formula to determine the percentage of voltage imbalance.

Voltage Imbalance

=100 x max voltage deviation from average voltage average voltage

Example: Supply voltage is 460-3-60.

 

AB = 452 v

 

BC = 464 v

 

AC = 455 v

 

Average Voltage =

455 + 464 + 455

3

 

=

1371

 

3

=

457

Determine maximum deviation from average voltage:

(AB) 457 – 452 = 5 v (BC) 464 – 457 = 7 v (AC) 457 – 455 = 2 v

Maximum deviation is 7 v. Determine percent voltage imbalance:

% Voltage Imbalance = 100 x

7

457

= 1.53%

This amount of phase imbalance is satisfactory as it is be- low the maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact local utility immediately.

Unit failure as a result of operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components.

CAUTION

Use care when drilling into corner post to avoid damage to con- denser coil.

Fig. 39 — Disconnect Location — Size 030-050 Units

37

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Carrier ZW, ZN030-105, Z6, 48ZT, Z8075-105, 48ZG installation instructions Disconnect Location Size 030-050 Units
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Z6, 48ZG, 48ZT, ZW, Z8075-105 specifications

The Carrier Z8075-105, Z6, 48ZG, 48ZT, and ZW series of HVAC systems represent a significant advancement in heating, ventilation, and air conditioning technology. These units are specifically designed for enhanced energy efficiency, superior performance, and ultimate comfort in residential and commercial spaces.

The Carrier Z8075-105 model stands out due to its impressive cooling and heating capabilities. It features a high Seasonal Energy Efficiency Ratio (SEER) and Heating Seasonal Performance Factor (HSPF), allowing for reduced energy consumption and lower utility bills. This model is equipped with advanced inverter technology that enables variable speed operation, significantly reducing noise levels and providing consistent temperature control.

Turning to the Z6 model, it is engineered for both robustness and reliability. It incorporates a modular design that allows for easy installation and maintenance. One of its key features is the use of innovative insulation materials that minimize sound levels, making it ideal for noise-sensitive environments. Furthermore, the Z6 series comes with a smart control system that allows users to monitor and adjust settings remotely, further optimizing energy usage.

The 48ZG and 48ZT models are designed with durability in mind. They utilize a fully enclosed compressor system that protects critical components from environmental damage. These models also boast enhanced dehumidification capabilities, making them suitable for humid climates. Equipped with advanced filtration systems, they improve indoor air quality by removing allergens and particulates effectively.

Carrier's ZW series exemplifies cutting-edge technology with its dual fuel capability, which allows the system to switch between a heat pump and a gas furnace, depending on outdoor temperatures. This feature maximizes energy savings while ensuring a comfortable indoor climate year-round. The ZW models also support integration with smart home systems, providing seamless control through mobile apps.

Collectively, these Carrier models are designed to meet the diverse needs of today’s consumers, offering a blend of efficiency, comfort, and intelligent control. Their ability to adapt to various environmental conditions while maintaining optimal performance makes them a leading choice in the HVAC market. With a focus on sustainability, these systems not only offer significant energy savings but also contribute to reducing the carbon footprint. As technology continues to evolve, Carrier remains at the forefront, delivering reliable, innovative HVAC solutions.
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