Refrigerant Charge

The 38HDF and 38QRF units can be matched with multiple outdoor units and thus additional charge might be required when matched with the 40QNC or 40QNQ units.

Table 6 – Additional Charge

Additional Charge lb (kg)

Unit Size

38HDF

38QRF

018

1.2 (0.55)

0.8 (0.36)

024

1.0 (0.45)

0.5 (0.23)

030

2.4 (1.1)

0

036

0

0

Note:The above additional charge is required amount for line lengths up to 25 ft (7.6 m). For line lengths exceeding 25 ft (7.6 m), additional charge will be required. Refer to the Duct Free Splits Long Line Guide.

Metering Device

The metering device(s) for these systems is a type B Accurator installed with the outdoor unit. One Accurator is required for the cooling only system and two are required for the heat pump systems. The Accurators are supplied with the outdoor unit. However, since the same outdoor unit can be matched with multiple indoor units, the correct Accurator must be selected. Refer to Table 7 for the correct Accurator size.

Table 7 – Accurator Sizes

System Type

Size

Cooling

Heating

Accurator

Accurator

 

 

 

018

49

---

Cooling Only

024

55

---

030

63

---

 

 

036

70

---

 

018

49

45

Heat Pumps

024

55

49

030

63

53

 

 

036

70

63

Power and Connecting Cables - Field Supplied

Power:

SThe indoor and outdoor units require a dedicated power supply. S Consult local building codes, NEC (National Electric Code) or

CEC (Canadian Electric Code) for any special requirements.

S Use Table 8 for the electrical requirements for the outdoor units and Table 9 for the indoor units to correctly size the cables and disconnect switches.

Table 8 – 38HDF / QRF Electrical Requirements

Unit

 

38HDF

38QRF

Voltage

Min Ckt Amps/

Min Ckt Amps/

Size

Fuse HACR Bkr

Fuse HACR Bkr

 

 

 

Amps

Amps

018

208/230---1---60

12.1/20

12.1/20

024

208/230---1---60

16.8/25

16.8/25

030

208/230---1---60

18.4/30

18.4/30

036

208/230---1---60

23.8/40

23.8/40

036

208/230---3---60

18.0/30

18.0/30

036

460---3---60

8.3/15

8.3/15

Table 9 – 40QNC / QNQ Electrical Requirements

Unit

 

40QNC

40QNQ

Voltage

Min Ckt Amps/

Min Ckt Amps/

Size

Fuse HACR Bkr

Fuse HACR Bkr

 

 

 

Amps

Amps

018

208/230---1---60

0.48/15

0.48/15

024

208/230---1---60

0.48/15

0.48/15

030

208/230---1---60

0.48/15

0.48/15

036

208/230---1---60

0.55/15

0.55/15

Control Wiring

Thermostat wires should be used for control wiring between the indoor and outdoor units. A two conductor cable is required for the cooling only units and a seven conductor cable is required on heat pumps. 18 AWG is recommended for any length up to 50 ft (15.2 m). 16 AWG is recommended for lengths between 50 and 200 ft (15.2 and 61.0 m).

User Interface

The indoor unit is supplied with a wireless remote control. The following accessories are also available

SWall mounted control. Up to 6 units can be daisy chained and controlled by one wired control.

SZone manager capable of controlling up to 32 units divided up to 8 different zones.

Operating Range

Ensure that the system operates within the application guidelines shown in Table 10.

Cooling Operating Range

 

Maximum

Minimum

 

DB ° F (° C)

WB ° F (° C)

DB ° F (° C)

WB ° F (° C)

Outdoor

125 (51.7)

--- ---

55 (12.8)

--- ---

Unit

 

 

 

 

Indoor

90 (32.2)

74 (23.3)

62 (17.0)

56 (13)

Unit

 

 

 

 

Heating Operating Range

 

Maximum

Minimum

 

DB ° F (° C)

WB ° F (° C)

DB ° F (° C)

WB ° F (° C)

Outdoor

75 (23.9)

67 (19.4)

17 ( ---8.3)

--- ---

Unit

 

 

 

 

Indoor

81 (27.2)

--- ---

62 (17.0)

--- ---

Unit

 

 

 

 

Accessories

An extensive list of field installed accessories is available for both indoor and outdoor units. Identify what accessories, if any, are required for the application at hand and consult the separate installation instructions for the accessories. Some of the accessories, especially on the indoor units, can be installed much easier if planned ahead.

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Carrier 40QNC, 40QNQ Power and Connecting Cables Field Supplied, User Interface, Operating Range, Accessories

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.