Mounting Unit on Wall

The units can also be mounted on the wall using the accessory mounting kit.

Complete Outdoor Refrigerant Piping Connec- tions

Follow the following general guidelines:

1.Use refrigerant grade field – supplied tubing. Refer to Table 4 for the correct line sizes.

2.Do not use less than 10 ft (93.05 m) of interconnecting tubing.

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

If any section of pipe is buried, there must be a 6 in. (152.4

mm)vertical rise to the valve connections on the outdoor unit. If more than the recommended length is buried, refrigerant may migrate to cooler, buried section during extended periods of system shutdown. This causes refrigerant slugging and could possibly damage the compressor at start-up.

When more than 80 ft (24.4 m) of interconnecting tubing is used, consult the Duct-Free Split System Long Line Application Guide for required accessories.

3.Insulate both lines. A minimum of 1/2 inch foam pipe insu- lation is recommended.

4.Run the refrigerant tubes as directly as possible and avoid unnecessary turns and bends.

5.Suspend refrigerant tubes to avoid damage to insulation or tubes so they do not transmit vibration to the structure.

6.When passing refrigerant tubes through the wall, seal the opening so rain and insects do not enter the structure. Leave some slack in refrigerant tubes between structure and out- door unit to absorb vibration.

NOTE: A fusible plug is located in unit suction line; do not cap this plug. If local codes require additional safety devices, install as directed.

Connection at Outdoor Unit

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

To prevent damage to unit or service valves observe the following:

SA brazing shield MUST be used.

SWrap service valves with wet cloth or use a heat sink material.

38HDF Units:

1.Assemble the connector tube to the factory supplied filter drier by:

a.Braze the field supplied connector to the inlet of the filter drier (see Fig. 17)

b.Braze the factory supplied flare connector to the outlet end of the filter drier (see Fig.17)

A09499

Fig. 17 - 38HDF018-036 Connector Tube Assembly

2.Assemble the Accurator body (see Fig. 18) using the correct factory supplied piston (refer to Table 7) .

NOTE: Arrow on AccuRater body points in free flow direction, away from the indoor coil.

A09501

Fig. 18 - AccuRater (bypass type) Metering Device

Components

3.Attach the complete Accurator assembly to the flare connec- tion end of the filter drier

4.Braze the completed filter drier/Accurator assembly to the liquid service valve.

5.Connect the field supplied line set to the filter drier/Accura- tor assembly and the suction valve. A sweat connection is required at the suction valve and flare connection is required for the mixed phase line.

6.Insulate any exposed areas between the line set and the li- quid valve.

8

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Carrier 40QNQ, 40QNC Complete Outdoor Refrigerant Piping Connec- tions, Mounting Unit on Wall, Connection at Outdoor Unit
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40QNQ, 40QNC specifications

The Carrier 40QNC and 40QNQ are advanced rooftop packaged units designed for efficient heating and cooling in commercial applications. These units are particularly known for their reliability, versatility, and energy-efficient performance, making them a preferred choice for building owners and HVAC professionals alike.

One of the standout features of the Carrier 40QNC and 40QNQ units is their variable-speed technology. This innovative system allows for precise control of airflow and temperature, ensuring that indoor environments maintain consistent comfort levels while minimizing energy consumption. The variable-speed compressor operates at different speeds based on the cooling demand, leading to reduced energy costs and improved overall efficiency.

In terms of energy performance, both models boast high Seasonal Energy Efficiency Ratios (SEER) and Heating Seasonal Performance Factors (HSPF). This not only contributes to lower energy bills but also helps in meeting energy efficiency standards and regulations in various regions. This makes the 40QNC and 40QNQ ideal for environmentally conscious building projects aiming for sustainability.

Another notable feature is the advanced microchannel coil technology utilized in these units. Microchannel coils are lighter, more compact, and provide enhanced heat exchange capabilities compared to traditional coils. This technology contributes to a more efficient refrigerant flow and ultimately leads to improved performance and durability of the unit.

Moreover, both models come equipped with a robust control system that enhances user interface. With smart thermostat compatibility, users can easily manage their building's climate remotely, ensuring optimal comfort and energy management. These systems are designed to integrate seamlessly with building management systems (BMS), allowing for greater control and optimization.

The construction of the Carrier 40QNC and 40QNQ also deserves mention. The units are built with durable materials designed to withstand harsh weather conditions, providing longevity and reliability. Additionally, the low sound levels produced by these units make them suitable for noise-sensitive settings, ensuring comfort without disruptive operation.

In summary, the Carrier 40QNC and 40QNQ are exemplary rooftop packaged units that combine advanced technology, energy efficiency, and reliable performance. Their variable-speed operation, microchannel coil technology, and robust control systems make them ideal solutions for commercial heating and cooling needs, catering to both comfort and sustainability.
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