Carrier 33ZCVAVTRM, 33ZCFANTRM, 33ZCSECTRM specifications Damper Configuration

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AIR

FLOW

CW TO OPEN, CCW TO CLOSE

AIR

FLOW

CCW TO OPEN, CW TO CLOSE

Fig. 7 — Damper Configuration

Connect the Power Transformer — An individual, field-supplied, 24 vac power transformer is recommended for each zone controller. If multiple zone controllers are powered from one power transformer (100 va maximum for UL [Under- writers’ Laboratories] Class 2 conformance), maintain polarity on the power input terminals. All transformer secondaries are required to be grounded. Use only stranded copper conductors for all wiring to the zone controller. Wiring connections must be made in accordance with NEC (National Electrical Code) and local codes. Ground the transformer at the transformer lo- cation. Provide an 18-gage, green, chassis ground wire at the terminal.

The power supply is 24 vac ± 10% at 40 va (50/60 Hz).

For 33ZCVAVTRM zone controllers, the power require- ment sizing allows for accessory water valves and for electric heat contactor(s). Water valves are limited to 15 va on both two-position and modulating hot water. The electric heat con- tactor(s) are limited to 10 va (holding) each.

For 33ZCFANTRM zone controllers, the power require- ment sizing allows for accessory water valves and for the fan contactor. Water valves are limited to 8 va on both two-position and modulating hot water. The fan contactor is limited to 11 va (holding).

NOTE: If a water valve or electric heat contactor exceeds these limits, or external contactors are required for electric heat, then it is recommended a 60 va transformer be used. The maximum rating for any output is 20 va.

NOTE: Do not run sensor or communication wiring in the same conduit with line-voltage wiring.

NOTE: An accessory conduit box (part no. 33ZCCONBOX) is available for conduit wiring connections to the zone controller.

Perform the following steps to connect the power transformer:

1.Install the field-supplied transformer in an electrical enclosure that conforms to NEC and local codes.

2.Connect 24 vac from the transformer as shown in the applicable wiring diagram (Fig. 8A-J).

Connect Airflow Pickups — The zone controller de- termines velocity pressure by obtaining the difference between high and low duct pressure from two airflow pickups. The pickups are connected to barb fittings on the zone controller with 1/4-in. polyethylene tubing. All piping for this purpose must conform to local codes.

Figure 9 indicates the positions of the two barb fittings.

Perform the following steps to install and connect the air- flow pickups:

1.Select a location on the air handler’s supply air duct where the airflow pickups will be installed. The loca- tion should be one where there are at least three duct diameters of straight duct upstream of the pickups. If this requirement is not met, stable airflow measure- ments may not be possible.

2.Mount the field-supplied airflow pickup(s) in the duct, following the manufacturer's directions. Two individ- ual pickups may be used, one for high pressure airflow and one for low pressure airflow. A dual pickup, which combines the two functions, may also be used. When using individual pickups, make sure that the one for high pressure airflow faces upstream, in the direction the air is coming from, and the one for low pressure airflow faces downstream, in the direction the air is going to.

3.Use field-supplied 1/4-in. tubing (rated for the applica- tion) to connect the high pressure airflow pickup to barb fitting P1 on the pressure transducer. At the zone controller, the P1 fitting is on the side with the filter installed. Be careful to avoid sharp bends in the tubing, because malfunctions may occur if the tubing is bent too sharply. Use at least 2 ft of tubing for reading stability.

4.Use field-supplied 1/4-in. tubing (rated for the applica- tion) to connect the low pressure airflow pickup to barb fitting P2 on the pressure transducer. Be careful to avoid sharp bends in the tubing, because malfunctions may occur if the tubing is bent too sharply. Use at least 2 feet of tubing for stability.

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Contents Installation, Start-Up Configuration Instructions General Typical Carrier Linkage System HF23BJ042 → Zone Controller Physical Details 33ZCFANTRM Shown→ Single Duct Air Terminal Zone Controller → VAV Fan Terminal Zone ControllerZone Controller Damper Configuration Low Low Yel Blu Ora Red Wht Com SPT HF23BJ042 PAT Yel → J Zone Controller Wiring Dual Duct Applications Zone Controller Wiring Dual Duct Applications → Install Sensors Airflow Pickup Installation Space Temperature Sensor Wiring Communication Bus Wiring to Zone Controller Primary Air Temperature Sensor Part Number 33ZCSENPAT Indoor Air Quality CO2 Sensor → Supply Air Temperature Probe Part No Zcsensat LocationsVentilation Rated Based on CO2 Set Point → Indoor Air Quality Sensor WiringColor Code Recommendations Recommended CablesHumidity Sensor Wiring → Remote Occupancy Wiring Communication Bus Wiring → Typical Water Valve and Sensor InstallationInitial Operation and Test Perform the following → Points Display Screen Configuration→ Alarm Limit Configuration Screen Default Value Display range Network Access Read/WritePPM → Linkage Coordinator Configuration Screen = low, 3 = high Occupancy Schedule Information Screen → Set Point Screen Airflow Service Configuration ScreenRange Default Value Rndsz Terminal Service Configuration ScreenClockwise Rotation Range Options Service Configuration Screen Default Value NormalPpm parts per million Srndsz Secondary Damper Service Configuration ScreenCOOLING, Heating → Linkage Maintenance Screen Occupancy Maintenance Screen Commissioning Mode Display Range → Zone Air Balance/Commissioning Table → Zone Maintenance Table Read/Write Page Copyright 1999 Carrier Corporation

33ZCSECTRM, 33ZCVAVTRM, 33ZCFANTRM specifications

The Carrier 33ZCFANTRM, 33ZCSECTRM, and 33ZCVAVTRM are advanced air conditioning units designed for commercial and light industrial applications. These models represent Carrier's commitment to innovation and energy efficiency, offering unbeatable performance while ensuring minimal environmental impact.

One of the main features of the Carrier 33ZCFANTRM series is its outstanding energy efficiency. These units are designed to meet or exceed Energy Efficiency Ratio (EER) standards, which translates to reduced energy consumption and lower utility bills for users. The implementation of variable speed drive technology allows for precise control of airflow and cooling, enabling the units to adapt to varying load requirements seamlessly. This not only enhances comfort levels but also optimizes energy use.

In terms of design, the Carrier 33ZCSECTRM model stands out with its compact footprint, making it ideal for installation in tight spaces. It features a robust chassis made from high-quality materials that ensure durability and resistance to harsh outdoor conditions. Additionally, the unit is equipped with sound-dampening technology, resulting in quieter operation compared to many traditional systems.

The 33ZCVAVTRM model takes versatility to the next level by incorporating advanced Variable Air Volume (VAV) technology. This allows for customized airflow delivery, ensuring that different areas of a building can be conditioned to meet specific comfort needs. The VAV system helps maintain optimal indoor air quality by continuously monitoring and adjusting airflows based on real-time demand.

Each model also features advanced controls which integrate seamlessly with building management systems. This connectivity provides users with powerful tools for monitoring system performance, enabling predictive maintenance and improving overall operational efficiency.

Moreover, the Carrier 33ZC series employs environmentally friendly refrigerants, which aligns with global sustainability goals. The use of these refrigerants contributes to a lower carbon footprint while still delivering exceptional cooling capacity.

Overall, the Carrier 33ZCFANTRM, 33ZCSECTRM, and 33ZCVAVTRM models epitomize Carrier's innovative spirit, combining cutting-edge technology with superior performance features. These units are well-suited to meet the rigorous demands of diverse commercial applications, promoting both comfort and efficiency in today's dynamic work environments. As businesses evolve, the need for reliable, efficient, and adaptable HVAC solutions becomes paramount, and these Carrier models stand ready to meet that challenge head-on.
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