697936-UIM-B-01211

 

 

Gas

Gable

 

Vent

Vent

Ventilated

 

 

 

Optional

Attic

 

Top Above

 

Inlet (a)

 

Insulation

 

 

 

Soffit

Outlet

 

Vent

Air (a)

rnaceuF

 

Gas

 

 

 

Water

 

 

Heater

 

 

Ventilated

 

 

Crawl Space

 

 

 

Gas

 

 

 

 

Gable

Vent

 

 

 

 

 

 

 

 

 

Vent

 

 

 

 

 

Ventilated

 

 

 

 

 

Attic

 

 

 

 

 

Top Above

 

 

 

 

 

Insulation

 

 

 

 

Soffit

 

 

 

Outlet

 

Vent

 

 

 

 

 

 

 

Air (b)

 

 

 

 

 

 

 

Heater

Furnace

Inlet

Inlet

Heater

 

Gas

 

 

 

Gas

Inlet

Water

 

 

 

Water

 

 

 

 

 

Air (b)

 

 

Air (a)

Air (b)

 

Gas

Vent

 

Outlet

 

Air (a)

Furnace

Inlet

 

 

Air (a)

FIGURE 36: Outside and Ambient Combustion Air

Air Supply Openings and Ducts

1.An opening may be used in lieu of a duct to provide to provide the outside air supply to an appliance unless otherwise permitted by the authority having jurisdiction. The opening shall be located within 12” (30.5 cm) horizontally from, the burner level of the appliance. Refer to “AIR SOURCE FROM OUTDOORS AND VENT AND SUPPLY AIR SAFETY CHECK” in these instructions for additional information and safety check procedure.

2.The duct shall be either metal, or a material meeting the class 1 requirements of CAN4-S110 Standard for Air Ducts.

3.The duct shall be least the same cross-sectional area as the free area of the air supply inlet opening to which it connects.

4.The duct shall terminate within 12” (30.5 cm) above, and within 24” (61 cm) horizontally from, the burner level of the appliance having the largest input.

5.A square or rectangular shaped duct shall only be used when the required free area of the supply opening is 9 in2 (58.06 cm2) or larger. When a square or rectangular duct is used, its small dimen- sion shall not be less than 3” (7.6 cm).

6.An air inlet supply from outdoors shall be equipped with a means to prevent the direct entry of rain and wind. Such means shall not reduce the required free area of the air supply opening.

7.An air supply inlet opening from the outdoors shall be located not less than 12” (30.5 cm) above the outside grade level.

Combustion Air Source from Outdoors

1.Two permanent openings, one within 12” (30.5 cm) of the top and one within 12” (30.5 cm) of bottom of the confined space, Two per- manent openings, shall communicate directly or by means of ducts with the outdoors, crawl spaces or attic spaces.

2.One permanent openings, commencing within 12” (30.5 cm) of the top of the enclosure shall be permitted where the equipment has clearances of at least 1” (2.54 cm) from the sides and back and 6” (15.2 cm) from the front of the appliance. The opening shall com- municate directly with the outdoors and shall have a minimum free area of:

a.1 square inch per 3000 BTU per hour (322 cm2 per 0.879 kW) of the total input rating of all equipment located in the enclosure.

b.Not less than the sum of all vent connectors in the confined space.

3.The duct shall be least the same cross-sectional area as the free area of the air supply inlet opening to which it connects.

4.The blocking effects of louvers, grilles and screens must be given consideration in calculating free area. If the free area of a specific louver or grille is not known. Refer to Table 11.

Ventilated Combustion Air

The ventilated attic space or a crawl space from which the combustion air is taken must comply with the requirements specified in “AIR SOURCE FROM OUTDOORS” in this instruction or in Section 5.3, Air for Combustion and Ventilation of the National Fuel Gas Code, ANSI Z223.1 (latest edition). This type installation requires two properly sized pipes. One brings combustion air from a properly ventilated attic space or crawl space and a second pipe that extends from the furnace vent connection (top right of unit) to the exterior of the building. Refer to Table 7 for intake pipe sizing, allowable length and elbow usage. Follow all notes, procedures and required materials in the "COMBUSTION AIR/VENT PIPE SIZING" section in these instructions when installing the combustion air pipe from the unit and into a ventilated attic space or crawl space. DO NOT terminate vent pipe in an Attic or Crawl Space.

Ventilated Combustion Air Termination

Refer to Figure 36 for required attic termination for the combustion air intake pipe. For attic termination, use two 90 elbows with the open end in a downward position. Be sure to maintain 12” (30.5 cm) clearance above any insulation, flooring or other material.

A crawl space combustion air installation consists of a straight pipe from the PVC coupling on the burner box that extends into the crawl space and terminates with a 1/4” (6.4 mm) mesh screen and no elbows.

Johnson Controls Unitary Products

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Johnson Controls TM9X*MP installation manual Air Supply Openings and Ducts, Ventilated Combustion Air Termination

TM9X*MP specifications

The Johnson Controls TM9X*MP series represents a significant advancement in the realm of HVAC control systems, positioning itself as a versatile solution for both commercial and residential applications. Renowned for its intelligent design and user-friendly interface, the TM9X*MP series aims to enhance energy efficiency and provide comfort to its users.

One of the standout features of the TM9X*MP series is its advanced communication capabilities. It employs the latest communication protocols, including BACnet and Modbus, which facilitate seamless integration with various building management systems. This connectivity ensures that users can monitor and control their HVAC systems remotely, providing unparalleled convenience and control over their environment.

Further enhancing its adaptability, the TM9X*MP series supports a wide range of HVAC equipment, including heat pumps, rooftop units, and variable air volume systems. This flexibility makes it an ideal choice for diverse applications, catering to the specific needs of different building types and operational requirements.

Energy efficiency is a significant focus of the TM9X*MP series. The system is equipped with advanced algorithms that optimize HVAC performance based on real-time data inputs. By utilizing trends in occupancy and weather forecasts, the TM9X*MP can make informed adjustments to operation schedules and settings, ensuring minimal energy wastage while maintaining optimal comfort levels.

Another notable characteristic of the TM9X*MP series is its intuitive touchscreen interface. This user-centric design makes it easy for operators to navigate through various settings and configurations, reducing the complexity often associated with HVAC controls. The interface can display vital system information, including energy consumption metrics and system diagnostics, empowering users to make informed decisions regarding their HVAC systems.

The TM9X*MP series also prioritizes robustness and reliability. Built with high-quality components, these controllers are designed to withstand varying environmental conditions, ensuring extensive operational longevity. Furthermore, the comprehensive support and resources provided by Johnson Controls augment the TM9X*MP series’ reputation for exceptional service and performance.

In conclusion, the Johnson Controls TM9X*MP series is a versatile and reliable solution for modern HVAC control needs. Its advanced communication capabilities, energy-efficient algorithms, user-friendly interface, and robust design make it a strong contender in the market, catering to the dynamic demands of contemporary heating and cooling applications. Whether for large commercial buildings or smaller residential units, the TM9X*MP series stands out as a top-tier choice for HVAC management.