Gas Piping (48 Series Units Only) Ð Unit is equipped for use with natural gas only. Installation must conform with local building codes, or in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1.

A 1¤8-in. NPT tapping plug, accessible for test gage con- nection, must be ®eld installed immediately upstream of gas supply connection to unit, but after manual gas valve. See Fig. 34. Natural gas pressure at unit gas connection must not be less than 5 in. wg or greater than 13 in. wg.

Size gas supply piping for 0.5 in. wg maximum pressure drop. Do not use supply pipe smaller than unit gas connection.

Disconnect gas piping from unit when leak testing at pressures greater than 0.5 psig. Pressures greater than

0.5psig will cause gas valve damage resulting in a haz- ardous condition. If gas valve is subjected to pressure greater than 0.5 psig, it must be replaced.

Installing Flue/Inlet Hoods (48MP Units Only)

ÐThe ¯ue/inlet hoods are shipped in a bag taped to the basepan in the gas section of the unit.

UNITS SIZES 62LAND 70M Ð The high heat units (48MPE), have 3 ¯ue hoods, 3 ¯ue de¯ector hoods, and one inlet air hood to be ®eld installed. See Fig. 35. The low heat units (48MPD) have 2 ¯ue hoods, 2 ¯ue de¯ector hoods, and one inlet air hood.

Remove the shipping block offs and shipping tape from the ¯ue openings in the access panel and the corner post. The inlet hood is shipped unassembled and must be as- sembled before mounting to the access panel. See Fig. 36. Install inlet screen on inlet hood using speed clips and screws provided.

Attach the ¯ue hoods to access panel and corner post us- ing screws provided. See Fig. 37. Hoods go over each com- bustion air outlet.

Install the ¯ue de¯ector baffle inside the ¯ue de¯ector hood. See Fig. 38. Install ¯ue de¯ector hoods over each ¯ue hood.

UNIT SIZES 82N, 90P, and 10R Ð The high heat units (48MPE), have 3 ¯ue hoods and 3 ¯ue de¯ector hoods to be ®eld installed. See Fig. 35. The low heat units (48MPD), have 2 ¯ue hoods and 2 ¯ue de¯ector hoods.

Remove the shipping block offs and shipping tape from the ¯ue openings in the access panel and the corner post.

Attach the ¯ue hoods to access panel and corner post us- ing screws provided. See Fig. 37. Hoods go over each com- bustion air outlet.

Install the ¯ue de¯ector baffle inside the ¯ue de¯ector hood. See Fig. 38. Install the ¯ue de¯ector hoods over each ¯ue hood.

*NPT plug is ®eld supplied. NOTE: Follow all local codes.

Fig. 34 Ð Gas Piping Details

INLET HOOD

GAS HEAT

(62L AND 70M

SECTION

SIZES ONLY)

PANEL

FLUE HOOD

AND FLUE

DEFLECTOR

HOOD

HIGH HEAT

UNITS ONLY

Fig. 35 Ð Flue and Inlet Hood Locations

(48MP Units Only)

INLET HOOD

INLET HOOD

SIDE PLATE (TYP EACH SIDE)

Fig. 36 Ð Inlet Hood Assembly

Fig. 37 Ð Flue Hood

26

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Carrier 48MPD, MPE62L-10R, 50MP62L-10R specifications Installing Flue/Inlet Hoods 48MP Units Only, Gas Piping Details
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MPE62L-10R, 50MP62L-10R, 48MPD specifications

The Carrier 48MPD, 50MP62L-10R, and MPE62L-10R are advanced rooftop packaged units designed for a variety of commercial HVAC applications. These systems offer a compelling blend of energy efficiency, versatility, and high performance, making them ideal choices for businesses looking to enhance their indoor climate control.

One of the standout features of the Carrier 48MPD series is its high efficiency rating, which significantly reduces operational costs while minimizing environmental impact. The unit utilizes advanced scroll compressors that provide reliable and efficient cooling capabilities, ensuring optimal temperature regulation regardless of outdoor conditions. This innovative design also contributes to quieter operation, enhancing indoor comfort without disruptive noise levels.

The Carrier 50MP62L-10R model boasts superior cooling and heating capabilities, equipped with a multi-speed fan system that allows for tailored airflow to suit specific project requirements. This model's economizer feature is pivotal for harnessing outside air to offset mechanical cooling, leading to further energy savings, particularly in moderate weather conditions. Additionally, the unit's dual-fuel capability enhances its operational flexibility, allowing it to switch between electric and gas heating sources depending on efficiency needs.

In terms of control technologies, the MPE62L-10R is equipped with Carrier's advanced Smart Evaporator Control, which ensures precise humidity management while optimizing energy consumption. This model also integrates seamlessly with building automation systems, enabling remote monitoring and adjustments for greater operational oversight and efficiency. The intuitive user interface simplifies system programming and operation, making it accessible even for those without extensive technical backgrounds.

Another important characteristic of these units is their robust construction, designed to withstand challenging weather conditions and ensure longevity. The use of high-quality materials and components means lower maintenance costs over time.

Overall, the Carrier 48MPD, 50MP62L-10R, and MPE62L-10R represent a well-engineered suite of HVAC solutions that excel in efficiency, adaptability, and user-friendliness, establishing themselves as leading choices for commercial indoor climate management. With their blend of innovative technology and solid performance, these systems are well-suited to meet the diverse needs of modern commercial spaces.
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