Smoke Detector Locations, Supply Air

Air is introduced to the duct smoke detector sensor’s sensing chamber through a sampling tube that extends into the HVAC duct and is directed back into the ventilation system through a (shorter) exhaust tube. The difference in air pressure between the two tubes pulls the sampled air through the sensing chamber. When a sufficient amount of smoke is detected in the sensing chamber, the sensor signals an alarm state and the controller automatically takes the appropriate action to shut down fans and blowers, change over air handling systems, notify the fire alarm control panel, etc.

		The sensor uses a process called differential sensing to
		prevent gradual environmental changes from triggering
		false alarms. A rapid change in environmental conditions,
		such as smoke from a fire, causes the sensor to signal an
		such as smoke from a fire, causes the sensor to signal an
	548J*14D	alarm state but dust and debris accumulated over time
		does not.
		For installations using two sensors, the duct smoke
		For installations using two sensors, the duct smoke
		detector does not differentiate which sensor signals an
		alarm or trouble condition.
		Smoke Detector Locations
		Smoke Detector Locations
		Supply Air —
		The Supply Air smoke detector sensor is located to the
		left of the unit’s indoor (supply) fan. See Fig. 51. Access
		is through the left side blower access panel. There is no
		sampling tube used at this location. The sampling tube
		inlet extends through the side plate of the fan housing
		(into a high pressure area). The controller is located on a
		bracket to the right of the return filter, accessed through
		the lift-off filter panel.

Smoke Detector Sensor

C08245

Fig. 51 - Typical Supply Air Smoke Detector Sensor

Location

Return Air without Economizer —

The sampling tube is located across the return air opening on the unit basepan. See Fig. 52. The holes in the sampling tube face downward, into the return air stream. The sampling tube is connected via tubing to the return air sensor that is mounted on a bracket high on the partition between return filter and controller location. (This sensor is shipped in a flat-mounting location. Installation requires that this sensor be relocated to its operating location and the tubing to the sampling tube be connected. See “Completing Installation of Return Air Smoke Sensor:” on page 29 for details.)

Return Air with Economizer —

The sampling tube is inserted through the side plates of the economizer housing, placing it across the return air opening on the unit basepan. See Fig. 52. The holes in the sampling tube face downward, into the return air stream. The sampling tube is connected via tubing to the return air sensor that is mounted on a bracket high on the partition between return filter and controller location. (This sensor is shipped in a flat-mounting location. Installation requires that this sensor be relocated to its operating location and the tubing to the sampling tube be connected. See the following installation procedure.)

Flexible

Exhaust Tube

Return Air

Sampling Tube

C10330

Fig. 52 - Return Air Sampling Tube Location

548J*14D specifications

The Bryant 548J*14D is a highly efficient and versatile air conditioning unit designed to meet the varying demands of residential and light commercial applications. This model stands out due to its advanced engineering, energy-saving features, and reliable performance, making it an ideal choice for homeowners looking to enhance comfort without compromising on energy efficiency.

One of the main features of the Bryant 548J*14D is its excellent SEER (Seasonal Energy Efficiency Ratio) rating, which signifies its ability to provide cooling while consuming less energy. Optimized for efficiency, this unit employs a high-efficiency compressor that adjusts its output based on cooling demands, allowing it to use only the energy necessary to maintain a comfortable environment.

The unit’s all-aluminum evaporator coil ensures durability and resistance to corrosion, contributing to its longer lifespan and consistent performance. Additionally, the Bryant 548J*14D incorporates advanced refrigeration technologies for maximum heat transfer efficiency. This technology not only enhances cooling performance but also improves overall system reliability.

A key characteristic of the Bryant 548J*14D is its Whisper Series technology designed for quiet operation. The low-noise design minimizes sound levels, allowing for unobtrusive cooling in residential spaces while still ensuring effective airflow and cooling capacity. This makes it particularly favorable for installation in bedrooms and other noise-sensitive areas.

Another noteworthy aspect of the Bryant 548J*14D is its compatibility with the MyBryant smartphone app, which enables homeowners to monitor and control their HVAC systems remotely. This connectivity offers convenience and helps to optimize energy usage, as users can adjust settings based on their schedules and preferences.

Furthermore, the Bryant 548J*14D is designed with a robustness that allows it to withstand diverse weather conditions, ensuring reliable performance even in extreme climates. The unit’s compact design eases installation in various settings, whether it's on rooftops, near walls, or on concrete pads.

In summary, the Bryant 548J*14D is a cutting-edge air conditioning unit that combines energy efficiency, quiet operation, and advanced technologies. With its robust construction, smart features, and reliable performance, it stands as a valuable solution for anyone looking to enhance comfort and save on energy costs in their homes or light commercial environments.

Bryant 548J*14D Smoke Detector Locations, Supply Air, Return Air with Economizer

Models: 548J*14D