SPACE TEMPERATURE SENSOR (T-56) — The space tem- perature sensor (P/N 33ZCT56SPT) wires are connected to terminals in the unit main control box.

CAUTION

Jumper MUST be in place between pins 1 and 3, 3 and 4 or inaccurate readings could result.

To connect the space temperature sensor, see Fig. 68.

COMMUNICATING SPACE TEMPERATURE SENSOR (T-58) — The communicating space temperature sensor (P/N 33ZCT58SPT) is wired to the Carrier Comfort Network® (CCN) connections on TB202.

SPACE TEMPERATURE AVERAGING — Applications that require averaging using multiple space temperature sensors can be satisfied using either 4 or 9 sensors as shown in Fig. 69.

NOTE: Only Carrier sensors may be used for standard T-55 space averaging. Sensors must be used in multiples of 1, 4, and 9 only, with total sensors wiring not to exceed 1000 ft. How- ever, space temperature reset can be accomplished with only one sensor.

NOTE: Do not use T-56 sensors for space temperature averag- ing because the 5-degree offset function will not work in a multiple sensor application.

HEAT INTERLOCK RELAY (VAV Units Only — Not Neces- sary For Digital Air Volume Applications) — Variable air vol- ume (VAV) units using optimal start (morning warm-up) and/ or occupied heating require that room terminals be controlled to the fully open position when the unit goes into Heating mode. The HIR (heat interlock relay) function is provided for this control. When the unit goes into Heating mode, the HIR is energized to provide switch closure or opening (depending on how the field-supplied power source is set up) to open the room terminals. The field connections for the HIR are at TB201 ter- minals 7 and 8. See Fig. 70.

Option and Accessory Control Wiring — The Z Series units may be used in applications with additional control features, options, or accessories. Refer to the Controls and Troubleshooting manual for more information concerning installation and configuration of options and accessories. Figures 70-80 contain wiring information on the following features:

heat interlock relay (Fig. 70)

outdoor air enthalpy switch (Fig. 71)

CO2 space sensor (Fig. 72)

filter status switch (Fig. 73)

fan status switch (Fig. 74)

space humidity sensor (Fig. 75)

return air humidity sensor (Fig. 75)

return air CO2 sensor (Fig. 76)

return air smoke detector (Fig. 77)

smoke control — fire shutdown (Fig. 78)

smoke control — purge (Fig. 79)

smoke control — evacuation (Fig. 79)

smoke control — pressurization (Fig. 79)

CCN connections (Fig. 80)

Carrier Comfort Network (CCN) Interface — The 48ZN,ZW,Z8 units can be connected to the CCN system if de- sired. The communication bus wiring is supplied and installed in the field. It consists of shielded, 3-conductor cable with shield wire.

The system elements are connected to the communication bus in a daisy chain arrangement. The positive pin of each

system element communication connector must be wired to the positive pins of the system element on either side of it, the negative pins must be wired to the negative pins, and the signal pins must be wired to signal ground pins. Wiring connections for the CCN system should be made at the terminal block using the screw terminals. The board also contains an RJ14 CCN plug that can be used to connect a Navigator™ device or field service computer. There is also another RJ14 LEN (Local Equipment Network) connection that is used to download soft- ware. Consult CCN Contractor’s Manual for further information.

NOTE: Conductors and drain wire must be 20 AWG minimum stranded, tinned copper. Individual conductors must be insu- lated with PVC, PVC/nylon, vinyl, Teflon, or polyethylene. An aluminum/polyester 100% foil shield and an outer jacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a minimum operating temperature range of –4 to 140 F (–20 C to 60 C) is required. See Table 20 for cables that meet the requirements.

Table 20 — CCN Connection Approved

Shielded Cables

MANUFACTURER

CABLE PART NO.

Alpha

2413 or 5463

American

A22503

Belden

8772

Columbia

02525

IMPORTANT: When connecting the CCN communica- tion bus to a system element, use a color coding system for the entire network to simplify installation and checkout.

The following color code is recommended:

SIGNAL

CCN BUS CONDUCTOR

COMM1 PLUG

TYPE

INSULATION COLOR

PIN NO.

+

RED

1

GROUND

WHITE

2

BLACK

3

NOTE: If a cable with a different color scheme is selected, a similar color code should be adopted for the entire network.

At each system element, the shields of its communication bus cables must be tied together. If the communication bus is entirely within one building, the resulting continuous field must be connected to a ground at one point only. If the commu- nication bus cable exits from one building and enters another, the shields must be connected to grounds at the lightning suppressor in each building where the cable enters or exits the building (one point per building only).

To connect the unit to the network (Fig. 80):

1.Turn off power to the control box.

2.Cut the CCN wire and strip the ends of the red (+), white (ground) and black (–) conductors. (If a different network color scheme is used, substitute appropriate colors.)

3.Wire the CCN to the screw terminals on the COMM board as follows (Fig. 80):

a.Secure the red (+) wire to CCN screw terminal + on the COMM board.

b.Secure the white (ground) wire to CCN screw terminal C on the COMM board.

c.Secure the black (–) wire to CCN screw terminal – on the COMM board.

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Carrier ZN030-105, ZW, Z6, 48ZT, Z8075-105, 48ZG installation instructions CCN Connection Approved Shielded Cables

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.