PRIMARY AIR INLET

UNIT WITH ELECTRIC REHEAT

2 FT. MIN.

AIR

TERMINAL

UNIT

ZC

HEAT

SAT

UNIT WITH OCTOPUS

PRIMARY

AIR INLET

ZC — Zone Controller

 

 

2 FT. MIN.

 

AIR

OCTOPUS

TERMINAL

 

UNIT

 

ZC

HEAT

SAT

Fig. 17 — Supply Air Temperature Probe (Part No. 33ZCSENSAT) Locations

The CO2 sensors (33ZCSENCO2) factory set for a range of 0 to 2000 ppm and a linear voltage output of 0 to 10 vdc. Figure 19 shows ventilation rates for various CO2 set points when outside air with a typical CO2 level of 350 ppm is used. Refer to the instructions supplied with the CO2 sensor for elec- trical requirements and terminal locations. The zone controller requires 24 vac 25 va transformer to provide power to the sensor.

To convert the CO2 sensor into a duct-mounted CO2 sensor, the duct-mounted aspirator (33ZCASPCO2) will need to be purchased.

To accurately monitor the quality of the air in the condi- tioned air space, locate the sensor near the return air grille so it senses the concentration of CO2 leaving the space. The sensor should be mounted in a location to avoid direct breath contact.

Do not mount the space sensor in drafty areas such as near supply ducts, open windows, fans, or over heat sources. Allow at least 3 ft between the sensor and any corner. Avoid mounting the sensor where it is influenced by the supply air; the sensor gives inaccurate readings if the supply air is blown directly onto the sensor or if the supply air does not have a chance to mix with the room air before it is drawn into the return air stream.

5.625

(14.3)

3.25

(8.3)

1.125

(2.9)

5

(12.7)

0.25

(0.8)

To accurately monitor the quality of the air in the return air duct, locate the sensor at least 6 in. upstream or 15 in. down- stream of a 90 degree turn in the duct. The downstream loca- tion is preferred. Mount the sensor in the center of the duct.

IMPORTANT: If the sensor is mounted in the return air duct, readjust the mixed-air dampers to allow a small amount of air to flow past the return air damper when- ever the mixing box is fully open to the outside air. If the damper is not properly adjusted to provide this mini- mum airflow, the sensor may not detect the indoor-air quality during the economizer cycle.

Fig. 18 — Indoor Air Quality (CO2) Sensor

(33ZCSENCO2)

303

24

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Image 24
Carrier 33ZCFANTRM, 33ZCVAVTRM → Supply Air Temperature Probe Part No Zcsensat Locations, Indoor Air Quality CO2 Sensor

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.