MQL Guide Specifications | Enviro 170S5FG instruction

MQL • GUIDE SPECIFICATIONS

2.0Fan decks shall be internally spring isolated (one-inch deflection) with the fan outlet connection to be made using canvas duct.

3.0 Each unit shall have one fan wheel and housing only.

4.0Fan wheels shall be designed for continuous operation at the maximum rated fan speed and motor horsepower. Fan wheels and shafts shall be selected to operate at least 25% below the first critical speed, and shall be statically and dynamically balanced as an assembly.

5.0 Fan shafts shall be solid steel, turned, ground and polished.

6.0Fan bearings shall be self-aligning, non-regreasable (permanent) ball bearing type selected for an aver- age life (L50) of 100,000 hours at design operation conditions, per ANSI Code B3.15.

7.0Fan motor shall be mounted within the fan section casing. Motor shall be NEMA Design B with sizes and electrical characteristics as shown on the equipment schedule.

8.0Fan drive shall be designed for a minimum of 1.15 service factor and shall be factory mounted and aligned. Belt drive package shall be variable-pitch type (constant volume) or fixed-pitch type (variable volume).

D.Coil Sections:

1.0All coils shall have aluminum plate fins mechanically bonded to 1/2-in. OD seamless copper tubes by mechanical expansion. Coils shall be factory leak tested at 450-psig air pressure under water in an illu-

minated test tank. Copper tubes shall be either 0.016” or 0.025” copper tube wall thickness. Coils shall have G90 galvanized steel or stainless steel casings with copper headers and sweat connections.

2.0Chilled water coils shall have a working pressure of 300-psig at 200° F. No turbulence-promoting devices will be permitted inside the tubes. Headers shall have vent connections.

3.0Direct-expansion coils shall be provided with pressure-type brass distributors with solder-type connec- tions. Coils shall be designed and tested in accordance with ANSI/ASHRAE 15.

4.0Hot water coils shall have a working pressure of 300-psig at 200° F. No turbulence-promoting devices will be permitted inside the tubes. Headers shall have vent connections.

5.0Steam distributing coils (standard single tube type) shall have a maximum working pressure of 15-psig at ambient temperatures above 35° F. Tube wall thickness shall be 0.025” as standard.

6.0Electric heat coils for use in blower coil units shall be open coil type, nichrome wire resistance elements, insulated by floating ceramic bushings. Thermal cutouts for primary and secondary over-temperature protection shall be provided to meet UL and NEC requirements. Maximum element watt density shall be 55-watts/sq inch. The manufacturer shall furnish an integral control box. It shall contain primary and sec- ondary control thermal cutouts, relays, airflow switch, and fused control transformer.

E.Filter Sections:

1.0Each filter section shall be designed and constructed to house the specific type of filter specified on the equipment schedule.

2.0Flat filter sections shall accept 2-in. 30% (MERV-6) pleated filters of standard sizes. Sections shall include side access slide rails. Flat filter section shall be arranged with minimum depth in direction of airflow.

3.0Angle filter section shall accept 2-in. 30% (MERV-6) pleated filters of standard sizes arranged in horizon- tal V formation. Sections shall include side access slide rails. Angle filter section shall be arranged with minimum depth in direction of airflow.

F.Damper Sections:

1.0Mixing boxes, filter mixing boxes and economizers shall have parallel blade, interconnecting dampers. Damper blades shall have parallel bends for stiffness and shall be mechanically fastened to steel rods rotating in brass bushings and mounted in rigid galvanized steel frames. Dampers shall be sectionalized to limit blade width, minimize blade warpage, and ensure tight closure.

2.0All dampers for mixing boxes and filter mixing boxes shall be rated with a leakage rate not to exceed 5% of air quantity calculated at 2000 fpm velocity though damper and 4.0-in.wg. pressure difference. Damper blades shall be gasketed and stainless steel perimeter-sealing strips shall be provided. Damper linkage shall be provided and installed with all mixing boxes.

G.Access Sections:

1.0Access sections shall be installed where indicated on the drawings and shall be as specified on the equipment schedule.

2.0 Access sections shall have removable access panels.

26	ENVIRO-TEC

170S5FG specifications

The Enviro 170S5FG is a cutting-edge hybrid vehicle from the renowned Enviro brand, designed to meet the evolving demands of public transportation while prioritizing sustainability and passenger comfort. One of the standout features of the Enviro 170S5FG is its hybrid powertrain, which effectively combines a diesel engine with an electric motor. This dual system significantly reduces emissions while ensuring optimal fuel efficiency. The vehicle is engineered to operate in various urban settings, making it an ideal choice for cities aiming to enhance their environmental impact.

In terms of performance, the 170S5FG boasts impressive acceleration and smooth operations, thanks to its state-of-the-art torque management system. The hybrid technology ensures that the vehicle can switch seamlessly between electric and diesel power, allowing it to conserve energy during low-speed travel, such as in stop-and-go traffic. This feature is particularly beneficial for reducing urban air pollution, as the vehicle emits fewer greenhouse gases compared to traditional diesel-only buses.

Passenger comfort is a priority in the Enviro 170S5FG, reflected in its thoughtfully designed interior. The spacious cabin can accommodate a significant number of passengers, with comfortable seating arrangements and ample standing room. Large windows provide natural light and enhance the overall travel experience. Additionally, the focus on accessibility means that the vehicle is equipped with features such as low floors, ramps, and designated spaces for wheelchairs, ensuring that it caters to all members of the community.

Safety comprises another area of excellence for the Enviro 170S5FG. Equipped with advanced safety technologies, including electronic stability control, anti-lock braking systems, and high-visibility LED lighting, the vehicle prioritizes the protection of passengers and drivers alike. The ergonomic design also includes enhanced visibility for the driver, contributing to safer navigation in complex urban environments.

Moreover, the Enviro 170S5FG incorporates intelligent connectivity features that enhance operational efficiency and passenger convenience. These technologies support real-time tracking and monitoring of bus performance, allowing transit authorities to optimize routes and schedules effectively.

In summary, the Enviro 170S5FG is a forward-thinking solution that combines hybrid technology, passenger-centric design, and advanced safety features. Its commitment to sustainability, performance, and comfort makes it an ideal asset for modern public transportation systems aiming to create greener cities while enhancing the commuter experience.