Carrier 38MGRQ48E3 Specifications

38MGR

Multi-zone Outdoor Unit Ductless System Sizes 18, 24, 30, 36 and 48

Product Data

Fig. 1 − 18K

Fig. 2 − 24K and 30K

INDUSTRY LEADING

FEATURES / BENEFITS

A competitively priced and creative solution to design problems.

The 38MGR ductless inverter driven multi−zone system provides individual comfort control for up to 5 separate zones. Two, three, four or five space−saving High Wall, Cassette, Ducted Style or Floor Console fan coils can be matched with one outdoor heat pump. The indoor fan coils are connected to the outdoor unit by refrigerant tubing and wires.

The different styles of indoor units can be mounted in several locations to accommodate the application. This selection of fan coils permits inexpensive and creative solutions to design problems such as:

SWhen adding air conditioning to spaces that are heated by hydronic or electric heat and have no ductwork.

SHistorical renovations or any application where preserving the look of the original structure is essential.

SCommercial add−on jobs where the existing air conditioning system cannot be stretched.

These compact indoor fan coil units take up very little space in the room and do not obstruct windows. The fan coils are attractively styled to blend with most room decors.

Advanced system components incorporate innovative technology to provide reliable cooling and heating performance at low sound levels.

Fig. 3 − 36K and 48K

NOTE: Images for illustration purposes only. Actual models may be slightly different.

Inverter Technology

The inverter driven compressor is designed to run at various input power frequencies (Hz) which controls the compressor’s motor speed.

Even Temperature – The control package, including the inverter, monitors the outdoor and indoor temperatures as they relate to the selected indoor set point and adjusts the compressor speed to match the load and keep the system operating continuously rather than cycling and creating temperature swings. This translates to higher comfort levels for the occupants.

Rapid Pull Down/Warm−Up – Comfort is increased by the inverter system’s ability to ramp up the compressor speed enabling the system to reach the user selected room temperature set point quicker.

Humidity Control – Running the system for longer periods and continuously varying the compressor speed enhances the humidity control.

Individual Room Comfort

Maximum comfort is provided because each space can be controlled individually based on the usage pattern.

Low Sound Levels

When noise is a concern, ductless systems are the answer. The indoor units are whisper quiet. There are no compressors indoors, either in the conditioned space or directly over it, and there is none of the noise usually generated by air being forced through the ductwork.

When sound ordinances and proximity to neighbors demand quiet operation, the 38MGR unit is the right choice. With the inverter technology, these units run at lower speeds most of the time resulting in reduced sound levels.

Inverter Technology – Enhanced Economical Operation

Ductless systems are inherently economical to operate. Individual rooms are heated or cooled only when required, and since the air is delivered directly to the space, there is no need to use additional energy to move the air in the ductwork. This economical operation is enhanced further when the inverter system output matches the load resulting in a more efficient system.

Easy−To−Use Controls

The multi−zone systems have microprocessor−based controls to provide the ultimate in comfort and efficiency. The user friendly wired and wireless remote controls provide the interface between the user and the unit.

Secure Operation

If security is an issue, outdoor and indoor units are connected only by refrigerant piping and wiring to prevent intruders from crawling through ductwork or wall openings. In addition, since the 38MGR can be installed close to an outside wall, coils are protected from vandals and severe weather.

Fast Installation

This compact ductless system is simple to install. A mounting bracket is included with the indoor units and only wires and piping need to run between the indoor and outdoor units. These units are fast and easy to install ensuring minimal disruption to customers in homes or the workplace. This makes the 38MGR systems the equipment of choice for retrofit applications.

Simple Servicing and Maintenance

Removing the top panel of the outdoor unit provides immediate access to the control compartment, providing the service technician access to the diagnostic LEDs to facilitate the troubleshooting process. In addition, the draw−thru design of the outdoor unit means that dirt accumulates on the outside surface of the coil. Coils can be cleaned quickly from the inside using a pressure hose and detergent.

On the indoor units, service and maintenance expense is reduced due to the permanent easy to clean filters. Also, error codes are displayed on the front panel to alert the user to certain system malfunctions

Built−in Reliability

Ductless system indoor and outdoor units are designed to provide years of trouble−free operation.

Both the indoor and outdoor units are well protected. Whenever the microprocessor detects abnormal conditions, the unit stops and an error code appears.

Inverter systems provide additional reliability due to the soft start. This refers to the ability of the inverter to start the compressor motor using reduced voltage and reduced current. This feature is beneficial from an electrical standpoint (eliminates current spikes) as well as an overall reliability standpoint due to reduced stress on all associated system components.

Agency Listings

All systems are listed with AHRI (Air conditioning, Heating, and Refrigeration Institute) and are ETL certified per UL 1995 standard.

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MODEL NUMBER NOMENCLATURE

OUTDOOR UNIT

38

MG

R

Q

18

B

- - 3

38 = OUTDOOR UNIT

MG = ALL

UNIT TYPE

R = OUTDOOR UNIT

SYSTEM TYPE

Q = HEAT PUMP

NOMINAL CAPACITY 18 - 1 1/2 TONS

24 - 2 TONS

30 - 21/2 TONS

36 - 3 TONS

48 - 4 TONS

Use of the AHRI Certified TM Mark indicates a manufacturer’s participation in the program For verification

of certification for individual products, go to www.ahridirectory.org.

VOLTAGE

3 = 208/230-1-60

NOT USED

MAXIMUM NUMBER OF FAN COIL UNITS THAT CAN BE CONNECTED TO THE OUTDOOR UNIT

B = 1:2

C = 1:3

D = 1:4

E = 1:5

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STANDARD FEATURES AND ACCESSORIES

Ease of Installation
Low Voltage Controls	S
Comfort Features
Microprocessor Control	S
Auto Restart Function	S
Auto Changeover	S
Energy Saving Features
Inverter Driven Compressor	S
46° F Heating Mode (Heating Setback)	S
Safety And Reliability
3 Minute Time Delay For Compressor	S
High Compressor Discharge Temperature	S
Low Voltage Protection	S
Compressor Overload Protection	S
Compressor Over Current Protection	S
IPM Module Protection	S
Aluminum Blue Hydrophilic pre-coated fins	S
Ease of Service
Diagnostic	S
Error Messages Displayed On Front Panel	S
Application Flexibility
Crankcase Heater	S
Basepan Heater	S

Legend

S Standard

A Accessory

Outdoor Units

Crankcase Heater

The crankcase heater is standard on all unit sizes. Heater clamps must be placed around the compressor oil stump.

Base pan Heater

The base pan heater is standard on all unit sizes.

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DIMENSIONS − OUTDOOR

																	UNIT SIZE																																			18									24																																				30																																				36																											48
		Height																																								in (mm)										27.6 (703)									31.89 (810)																																				31.89 (810)																																				52.48 (1333)																											52.48 (1333)
			Width																																							in (mm)										33.27 (845)									37.24 (946)																																				37.24 (946)																																				41.14 (1045)																											41.14 (1045)
		Depth																																								in (mm)										13.19 (335)									15.20 (386)																																				15.20 (386)																																				14.96 (380)																											14.96 (380)
Weight-Net																																										lbs (kg)										105.8 (48)									149.9 (68)																																				156.5 (71)																																				223.8 (101.5)																											223.8 (101.5)

Fig. 4 − Outdoor Dimensions Size 18

NOTE: Master valves are not available on the size 18 unit.

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DIMENSIONS − OUTDOOR (CONTINUED)

Master Valve

Liquid Line

Master Valve

Suction Line

Fig. 5 − Outdoor Dimensions Size 24

Master Valve	Master Valve
Liquid Line	Suction Line

Fig. 6 − Outdoor Dimensions Size 30

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DIMENSIONS − OUTDOOR (CONTINUED)

Master Valve

Liquid Line

Master Valve

Suction Line

Fig. 7 − Outdoor Dimensions Size 36

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DIMENSIONS − OUTDOOR (CONTINUED)

Master Valve	Master Valve
Liquid Line	Suction Line

Fig. 8 − Outdoor Dimensions Size 48

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CLEARANCES − OUTDOOR

A

Air-inlet

E

D	B	C

Air-outlet

Fig. 9 − Clearances Outdoor

	UNIT	MINIMUM VALUE
		in. (mm)
	A	24 (609)
	B	24 (609)
	C	24 (609)
	D	4 (101)
	E	6 (152)

NOTE: Outdoor Unit must be mounted at least 2in (50mm) above the maximum anticipated snow depth.

COMPATIBILITY TABLE

	INDOOR UNIT				OUTDOOR UNIT
			38MGRQ18B--3 38MGRQ24C--3		38MGRQ30D--3	38MGRQ36D--3	38MGRQ48E--3
		40MAQB09B--3	•	•	•	•	•
	High Wall	40MAQB12B--3	•	•	•	•	•
		40MAQB18B--3		•	•	•	•
		40MAQB24B--3			•	•	•
		40MBQB09C--3	•	•	•	•	•
	Cassette	40MBQB12C--3	•	•	•	•	•
		40MBQB18C--3		•	•	•	•
		40MBQB09D--3	•	•	•	•	•
	Ducted	40MBQB12D--3	•	•	•	•	•
		40MBQB18D--3		•	•	•	•
		40MBQB24D--3			•	•	•
	Floor	40MBQB09F--3	•	•	•	•	•
	Console	40MBQB12F--3	•	•	•	•	•

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