Carrier 40MBQB12C--3 Hoja de especificaciones descargar pdf (Pagina 21)

UNIT MOUNTING (INDOOR)

Mounting Bracket – The fan coil units are furnished with

mounting brackets or dedicated mounting holes to hang the unit.

Support – Adequate support must be provided to handle the

weight of all fan coils. Refer to the Physical Data section for

weights, and the base unit dimensional drawings.

Unit Leveling – For reliable operation, units should be level in all

planes.

Clearances – Minimum clearance as shown in Fig. 13- 14.

Unit location – Select a location which will provide the best air

circulation for the room. These units should be positioned as high

to have adequate air circulation. The unit return and discharge

should not be obstructed by furniture, curtains, or anything which

may cause the unit to short cycle or air to recycle.

UNIT MOUNTING (OUTDOOR)

Support – A location which can bear the weight of outdoor unit.

Refer to the Physical Data section for weights, and base

dimensional drawings.

Unit Leveling – For reliable operation, units should be level in all

planes.

Clearances – Minimum clearances, as shown in Fig. 14, must be

provided for airflow. The outdoor units are designed for free- blow

applications. Air inlets and outlets should not be restricted.

Unit location – A location which is convenient to installation and

not exposed to strong wind.

SYSTEM OPERATING CONDITIONS

Cooling operating range:

Operating Range

Min / Max °F (°C)

Cooling Heating

Outdoor DB 4 / 122 (-20 / 50) 4 / 86 (-20 / 30)

Indoor DB 63 / 90 (17 / 32) 32 / 86 (0 / 30)

Indoor WB 59 / 84 (15 / 29)

Heating operating range:

Non-Operating Temperature Range

Min / Max °F (°C)

Indoor/O utdoor DB 32 / 86 (0 / 30)

METERING DEVICES

The outdoor unit has multiple electronic expansion valves to

manage the refrigerant flow to the different indoor fan coils

connected to that unit.

REFRIGERANT LINES

General Guidelines:

1. The outdoor units are shipped with full charge of R- 410A

refrigerant. All charges, line sizing, and capacities are based

on runs of 25 ft (7.6 m). For runs over 25 ft (7.6m), consult

long- line section on this page for proper charge

adjustments.

2. Refrige rant li ne s should not be buri ed in the ground. If it is

neces sar y to bury the li nes, not mor e tha n 36 inches (914 mm)

should be buried. Provide a mi ni m um of 6 inch (152 mm)

verti cal r i se to service val ves to prevent r e fri gera nt migr ation.

3. Both lines must be insulated. Use a minimum of ½-inch

(12.7 mm) thick insulation. Closed - cell insulation is

recommended in all long- line applications.

4. Special consideration should be given to isolating

interconnecting tubing from the building structure. Isolate

the tubing so that vibration or noise is not transmitted into

the structure.

Long Line Applications:

S No change in line sizing is required.

Unit

Size

Total Line Length

ftper indoor unit

Additional Charge, oz/ft.

ft (m)

Min Max

10 - 25

(3 - 8)

>25 - 66

(8 - 20)

>66 - 82

(20 - 25)

>82 - 98

(25 - 30)

None 0.16

27 82

0.1636

98 0.16

DRAIN CONNECTIONS

Install drains to meet the local sanitation codes. If adequate gravity

drainage cannot be provided, a field installed condensate pump

accessory should be used. Refer to the Installation Instructions of

the condensate pump for detailed specifications. (Condensate

Pump built- in on Ducted and Cassette indoor units).

NOTE: The high wall fan coils have internal condensate trap.

An external trap is not required.

WIRING

The main power is supplied to the outdoor unit. Four field supplied

connecting cables from the outdoor unit to each of the indoor units

are: L1, L2, Ground, and S for communication between the

outdoor unit and each indoor unit.

CONTROL SYSTEM

The 38MG / 40MA / 40MB unit is equipped with a microprocessor

control to operate the system and give optimum levels of comfort

and operating efficiency.

There are microprocessor boards and thermistors located in both

the indoor and outdoor units. The thermistors monitor the system

operation and control the operating mode. The change in the

settings or the modes of operation, use the factory supplied

wireless remote control.

The 38MG / 40MA / 40MB unit has the following operating

modes:

S Fan Only

S Auto

S Heating (on Heat Pumps only)

S Cooling

S Dehumidification (Dry)

FAN ONLY - In Fan Only mode, the system filters and circulates

the room air without changing the room air temperature.

AUTO - In Auto mode, the system will automatically select one of

the following operating modes: cooling, heating or fan only based

on the difference between the room temperature and the set point

temperature.

HEATING - In the Heating mode, the system heats and filters

room air.

COOLING - When in Cooling mode, the fan runs all the time and

the system cools, dries and filters room air.

DEHUMIDIFICATION (DRY) - in Dehumidification (Dry)

mode, the system dries, filters and slightly cools room temperature.

This mode does not take place of a dehumidifier.

In addition to the above modes that are selected by using the

remote control, the unit can run in emergency mode by using a

manual button. This mode is used when the remote is misplaced or

the batteries in the remote have died. In this mode, the unit will run

in AUTO mode with a predetermined set point (76_F/24.4_C)

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Carrier 40MBQB12C--3 Hoja de especificaciones Pagina 21

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