Carrier 38MURA User manual

Specifications subject to change without notice.

Fig. 1 —Sizes 18K, 18K HH, 24K, 24K HH, 30K,

30K HH, 36K

Fig. 2 —Sizes 36K HH, 48K, 48K HH, 60K, 60K HH

NOTES: Read the entire instruction manual before starting the

installation. Images are for illustration purposes only.

Actual models may differ slightly. HH Denotes High Heat

Models.

TABLE OF CONTENTS

PAGE

SAFETY CONSIDERATIONS........................................................2

MODEL NUMBER AND ACCESSORIES.....................................3

DIMENSIONS..................................................................................4

CLEARANCES ................................................................................8

INSTALLATION REQUIREMENTS .............................................9

INSTALLATION .............................................................................9

Step 1 - Check Equipment ................................................................9

Step 2 - Mount Unit ..........................................................................9

Step 3 - Condensate Drain Installation .............................................10

Step 4 - Operating Ambient..............................................................10

Step 5 - Refrigerant Piping Connections ..........................................10

Step 6 - Electrical Connections - Dip Switch Configuration............13

Step 7 - Evacuate Coil And Tubing System .....................................15

ELECTRICAL DATA......................................................................16

24V CONNECTION DIAGRAMS ..................................................16

START-UP .......................................................................................18

CARE AND MAINTENANCE........................................................18

TROUBLESHOOTING ...................................................................18

OUTDOOR UNIT DIAGNOSTIC GUIDES ...................................19

CROSSOVER SOLUTIONS............................................................20

Installation Instruction

38MURA

Residential Single Zone Heat Pump System

Sizes 18 to 60

38MURA: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

SAFETY CONSIDERATIONS

Installing, starting up, and servicing air- conditioning equipment can be

hazardous due to system pressures, electrical components, and equipment

location (roofs, elevated structures, etc.).

Only trained, qualified installers and service mechanics should install,

start- up, and service this equipment.

Untrained personnel can perform basic maintenance functions such as

coil cleaning. All other operations should be performed by trained service

personnel only.

When working on the equipment, observe the precautions in the

literature and on tags, stickers, and labels attached to the equipment.

Follow all safety codes.Wear safety glasses and work gloves. Keep a

quenching cloth and a fire extinguisher nearby when brazing. Use care in

handling, rigging, and setting bulky equipment.

Read these instructions thoroughly and follow all warnings or cautions

included in the literature and attached to the unit. Consult local building

codes and National Electrical Code (NEC) for special requirements.

Recognize safety information.

This is the safety - alert symbol . When you see this symbol on the unit

and in instructions or manuals, be alert to the potential for personal injury.

Understand these signal words: DANGER, WA R N I N G , and CAUTION.

These words are used with the safety- alert symbol.

DANGER identifies the most serious hazards which will result in severe

personal injury or death.

WARNING signifies hazards which could result in personal injury or

death.

CAUTION is used to identify unsafe practices which may result in minor

personal injury or product and property damage.

NOTE is used to highlight suggestions which will result in enhanced

installation, reliability, or operation.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or

death.

Before installing, modifying, or servicing system, the main

electrical disconnect switch must be in the OFF position. There

may be more than 1 disconnect switch. Lock out and tag switch

with a suitable warning label.

WA R N I N G

EXPLOSION HAZARD

Failure to follow this warning could

result in death, serious personal injury,

and/or property damage.

Never use air or gases containing oxygen

for leak testing or operating refrigerant

compressors. Pressurized mixtures of air

or gases containing oxygen can lead to an

explosion.

WAR NI NG

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or

improper operation.

Do not bury more than 36 in. (914 mm) of refrigerant pipe in the

ground. If any section of pipe is buried, there must be a 6 in. (152

mm) vertical rise to the valve connections on the outdoor units. If

more than the recommended length is buried, refrigerant may

migrate to the cooler buried section during extended periods of

system shutdown. This causes refrigerant slugging and could

possibly damage the compressor at start-up.

CAUTION

38MURA: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

MODEL NUMBER AND ACCESSORIES

The system is shipped with the following accessories. Use all of the

installation parts and accessories to install the system. Improper

installation may result in water leakage, electrical shock and fire, or cause

the equipment to fail. Keep the installation manual in a safe place and do

not discard any other accessories until the installation work has been

completed.

Table 1 — Accessories

Table 2 — Suction Line and Liquid Line Flare to Braze

Fig. 3 — Outdoor Unit

NOTE:

- If the outdoor unit is higher than the indoor unit, prevent rain

from flowing into the indoor unit along the connection pipe by

making a downward arc in the connection pipe before it enters

the wall to the indoor unit. This ensures that rain drips from

the connection pipe before it enters the wall.

- Piping and the interconnecting wiring are field supplied.

- Figure 3 is only a sketch. The actual model may differ slightly.

Table 3 lists the units covered in this document.

Table 3 — Unit Sizes

PART

NO. PART NAME QTY.

1 Outdoor unit 1

- Literature package including installation instructions 1

-Mounting pads for the outdoor unit (helps with vibration

prevention during unit operation) 4

-DrainJoint 1

-DrainHose 1

- Flare to Braze Adapter (See Table 2) 2

- Suction Line Reducer (Some models, see Table 2) 1

Model # Suction Line Flare

to Braze Adapter

Liquid Line Flare

to Braze Adapter

Suction Line Flare

to Flare Reducer

38MURAQ18AA3 5/8” flare

to 3/4” braze

3/8” flare

to 3/8” braze

5/8” flare

to 3/4” flare

38MURAQ24AA3 5/8” flare

to 3/4” braze

3/8” flare

to 3/8” braze

5/8” flare

to 3/4” flare

38MURAQ30AA3 3/4” flare

to 3/4” braze

3/8” flare

to 3/8” braze -

38MURAQ36AA3 3/4” flare

to 3/4” braze

3/8” flare

to 3/8” braze -

38MURAQ48AA3 3/4” flare

to 3/4” braze

3/8” flare

to 3/8” braze -

38MURAQ60AA3 7/8” flare

to 7/8” braze

3/8” flare

to 3/8” braze -

38MURAQ18AB3 5/8” flare

to 3/4” braze

3/8” flare to

3/8” braze

5/8” flare

to 3/4” flare

38MURAQ24AB3 3/4” flare

to 3/4” braze

3/8” flare

to 3/8” braze -

38MURAQ30AB3 3/4” flare

to 3/4” braze

3/8” flare

to 3/8” braze -

38MURAQ36AB3 3/4” flare

to 3/4” braze

3/8” flare

to 3/8” braze -

38MURAQ48AB3 3/4” flare

to 3/4” braze

3/8” flare

to 3/8” braze -

38MURAQ60AB3 7/8” flare

to 7/8” braze

3/8” flare

to 3/8” braze -

Ŷ2XWGRRUXQLW



CBP

SYSTEM TONS BTUH VOLTAGE -

PHASE OUTDOOR MODEL

1.50 18,000 208/230-1 38MURAQ18AA3

1.50 18,000 208/230-1 38MURAQ18AB3

2.00 24,000 208/230-1 38MURAQ24AA3

2.00 24,000 208/230-1 38MURAQ24AB3

2.50 30,000 208/230-1 38MURAQ30AA3

2.50 30,000 208/230-1 38MURAQ30AB3

3.00 36,000 208/230-1 38MURAQ36AA3

3.00 36,000 208/230-1 38MURAQ36AB3

4.00 48,000 208/230-1 38MURAQ48AA3

4.00 48,000 208/230-1 38MURAQ48AB3

5.00 60,000 208/230-1 38MURAQ60AA3

5.00 60,000 208/230-1 38MURAQ60AB3

38MURA: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

DIMENSIONS

Table 4 — Dimensions

Fig. 4 — Size 18K

System

Size

(208/230V) Packaging

Height (H)

in (mm)

Width (W)

in (mm)

Depth (D)

in (mm)

Net Weight

lbs. (kg)

Height (H)

in (mm)

Width (W)

in (mm)

Depth (D)

in (mm)

Net Weight

lbs. (kg)

18K 21.81 (554) 31.69 (805) 12.99 (330) 75.84 (34.4) 24.21 (615) 36.02 (915) 14.57 (370) 81.35 (36.9)

18K High

Heat 26.50 (673) 35.04 (890) 13.29 (338) 102.95 (46.7) 29.13 (740) 39.17 (995) 15.67 (398) 109.79 (49.8)

24K 26.50 (673) 35.04 (890) 13.29 (338) 102.29 (46.4) 29.13 (740) 39.17 (995) 15.67 (398) 109.79 (49.8)

24K High

Heat 31.89 (810) 37.24 (946) 16.02 (407) 136.69 (62) 34.84 (885) 42.91 (1090) 19.69 (500) 145.50 (36)

30K 31.89 (810) 37.24 (946) 16.02 (407) 141.76 (64.3) 34.84 (885) 42.91 (1090) 19.69 (500) 151.46 (68.7)

30K High

Heat 31.89 (810) 37.24 (946) 16.02 (407) 159.83 (72.5) 34.84 (885) 42.91 (1090) 19.69 (500) 169.75 (77)

36K 31.89 (810) 37.24 (946) 16.02 (407) 151.68 (68.8) 34.84 (885) 42.91 (1090) 19.69 (500) 161.16 (73.1)

36K High

Heat 52.48 (1333) 37.48 (952) 16.34 (415)

227.07 (103)

58.27 (1480) 43.11 (1095) 19.49 (495)

255.73 (116)

48K 52.48 (1333) 37.48 (952) 16.34 (415)

217.59 (98.7)

58.27 (1480) 43.11 (1095) 19.49 (495)

248.68 (112.8)

48K High

Heat 52.48 (1333) 37.48 (952) 16.34 (415)

220.24 (99.9)

58.27 (1480) 43.11 (1095) 19.49 (495)

248.90 (112.9)

60K 52.48 (1333) 37.48 (952) 16.34 (415)

217.15 (98.5)

58.27 (1480) 43.11 (1095) 19.49 (495)

248.46 (112.7)

60K High

Heat 52.48 (1333) 37.48 (952) 16.34 (415) 239.86 (108.8) 58.27 (1480) 43.11 (1095) 19.49 (495) 271.61 (123.2)

DETAIL

SCALE2:1

334.162

13.16

894.715

35.23

663

26.1

890.603

35.06

71.521

2.82

337.562

13.29

73.517

2.89

122.053

4.81

6.026

0.24

0.43

672.787

26.49

379.586

14.94

346.674

13.65

106.051

4.18

38MURA: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

DIMENSIONS (CONT)

Fig. 5 — Sizes 18K HH / 24K

4.18

[106.051]

4.81

[122.053]

26.49

[672.787]

0.43

[11]

13.29

[337.562] DETAIL A

SCALE 2:1

2.89

[73.517]

R 0.24

[6.026]

35.23

[894.71

26.1

[663]

35.06

[890.603]

2.82

[71.521]

14.94

[379.58

13.16

[334.16

13.65

[346.67

38MURA: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

DIMENSIONS (CONT)

Fig. 6 — Sizes 24K HH / 30K / 30K HH / 36K

38MURA: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

DIMENSIONS (CONT)

Fig. 7 — Sizes 36K HH / 48K / 48K HH / 60K / 60K HH

41(1045) W1

37.5(952) W

15.9(404) B

17.6(448) C

52.5(1333) H

16.3(415) D

25(634) A

.9(74)

27.9(708)

38.4(976)

38MURA: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

CLEARANCES

Fig. 8 — Clearances

Table 5 — Clearance Dimensions

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

Fig. 9 —Clearances for multiple units

UNIT MINIMUM VALUE

IN. (MM)

A 24 (610)

B 24 (610)

C 24 (610)

D 4 (101)

E 4 (101)

Air inlet

Air outlet

59in (150cm)

or more on a

multiple parallel

unit arrangement

24in (61cm) or more on a single parallel unit arrangement

59in (150cm)

or more when

facing each other

Blowing into the air-inlet of other

condenser shall be avoided.

24in (60cm)

or more

19in (48cm) or more on

a multiple parallel unit

arrangement 4in (10cm)

or more on a single

parallel unit arrangement

9.8in (25cm) or more for proper airflow

24in (61cm) or more is recommended

for service

59in (150cm)

or more when

facing each other

Blowing into the air-inlet of other

condenser shall be avoided.

59in (150cm)

or more

38MURA: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

INSTALLATION REQUIREMENTS

• A location which is convenient to installation and not exposed to

strong winds.

• A location which can bear the weight of the outdoor unit and where

the outdoor unit can be mounted in a level position.

• A location which provides appropriate clearances (see Fig. 8).

• Allow sufficient space for airflow and service of the unit. See Fig. 8

for the required minimum distances between the unit or walls.

NOTE: DO NOT install the indoor or outdoor units in a location with

special environmental conditions.

INSTALLATION

Step 1 - Check Equipment

Unpack the unit and move to the final location. Remove the carton, taking

care not to damage the unit. Inspect the equipment for damage prior to

installation. File a claim with the shipping company if the shipment is

damaged or incomplete.

Locate the unit rating plate which contains the proper installation

information. Check the rating plate to ensure the unit matches the job

specifications.

Step 2 - Mount Unit

1. Select the installation location of the outdoor unit following the

installation requirements. To prevent high wind exposure, install the

outdoor unit with the air inlet side facing the wall (see fig 10).

Fig. 10 — High Wind Installation

2. Use a rigid base to support the unit in a level position. If conditions or

local codes require the unit be attached to a pad, tie down bolts should

be used and fastened through knockouts provided in unit base pan. For

hurricane tie downs, contact distributor for details and PE (Professional

Engineer) Certification, if required.

PRODUCT INSTALLATION

• Installation must be performed by an authorized dealer or

specialist. A defective installation can cause water leakage,

electrical shock, or fire.

• The installation must be performed according to the installation

instructions. Improper installation can cause water leakage,

electrical shock, or fire. (In North America, installation must be

performed in accordance with the requirements of NEC or CEC

by authorized personnel only.)

• Contact an authorized service technician for repair or

maintenance of this unit. This appliance must be installed in

accordance with local codes.

• Only use the included accessories, parts, and specified parts for

installation. Using non-standard parts can cause water leakage,

electrical shock, fire, or unit failure.

• To prevent exposure to wind, install the outdoor unit with its air

inlet side facing the wall

• Install drainage piping according to the instructions in this

manual. Improper drainage may cause water damage to your

home and property.

•DO NOT install the unit in a location that may be exposed to

combustible gas leaks. If combustible gas accumulates around

the unit, it may cause a fire.

•DO NOT turn on the power until all work has been completed.

• When moving or relocating the system, consult experienced

service technicians for the disconnection and re-installation of

the unit.

WA R N I N G

Strong

wind

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or

improper operation.

In regions with snowfall and cold temperatures, avoid installing

the outdoor unit in areas where it can be covered by snow.

Blocking the air intake may result in reduced airflow, significantly

reduced performance and damage to the equipment.

CAUTION

38MURA: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Step 3 - Condensate Drain Installation

NOTE: Install drains must meet local sanitation codes.

Install the outdoor unit drain joint

Fit the seal into the drain joint, then insert the drain joint into the base pan

hole of the outdoor unit. Rotate 90° to securely assemble them. Connect

the drain joint with an extension drain hose to avoid condensate from

draining off the outdoor unit during the heating mode.

Fig. 11 — Drain Joint

NOTE: Images are for illustration purposes only.

NOTE: Basepan built-in with multiple holes for proper draining

during defrost. For applications where it is required to seal

these holes, and re-direct the condensate drain, rubber plugs

are available through RCD.

Table 6 — Base Pan Rubber Plugs

Step 4 - Operating Ambient

Step 5 - Refrigerant Piping Connections

Table 7 — Piping and Refrigerant

Base pan hole of

outdoor unit

Drain fitting

Seal

OUTDOOR UNIT MODEL

NUMBER

PER UNIT

BASE PAN RUBBER PLUGS

RCD PART NUMBER

38MURAQ18AA3

38MURAQ18AB3

38MURAQ24AA3

38MURAQ24AB3

38MURAQ30AA3

38MURAQ30AB3

38MURAQ36AA3

38MURAQ36AB3

38MURAQ48AA3

38MURAQ48AB3

38MURAQ60AA3

38MURAQ60AB3

12600801A00077

EQUIPMENT DAMAGE HAZARD

In cold climates, ensure the drain hose is as vertical as possible to

ensure swift water drainage. If water drains too slowly, it can freeze

in the hose and flood the unit.

CAUTION

OPERATING RANGE AND HUMIDITY HIGH HEAT

MODELS

REGULAR

MODELS

Operating Range

Cooling Outdoor

Min - Max DB

°F -22~130 5~130

°C -30~55 -15~55

Heating Outdoor

Min - Max DB

°F -22~86 -5~86

°C -30~30 -15~30

Operating Humidity % 0~80 0~80

System Size 18K 18K High

Heat 24K 24K High

Heat 30K 30K High

Heat 36K 36K High

Heat 48K 48K High

Heat 60K 60K High

Heat

(208/230 V)

Min. Piping Length ft.(m) 9.8 (3)

Standard Piping Length ft.(m) 24.6 (7.5)

Max. outdoor-indoor

height difference

(OU higher than IU)

ft.(m) 65.6 (20) 65.6 (20) 82 (25) 82 (25) 82 (25) 82 (25) 98.4 (30) 98.4 (30) 98.4 (30) 98.4 (30) 98.4 (30) 98.4 (30)

Max. outdoor-indoor

height difference

(IU higher than OU)

ft.(m) 65.6 (20) 65.6 (20) 82 (25) 82 (25) 82 (25) 82 (25) 98.4 (30) 98.4 (30) 98.4 (30) 98.4 (30) 98.4 (30) 98.4 (30)

Suction Pipe

(size - connection type) in (mm) ø3/4” (19) ø3/4” (19) ø3/4” (19) ø3/4” (19) ø3/4” (19) ø3/4” (19) ø3/4” (19) ø3/4” (19) ø3/4” (19) ø3/4” (19) ø7/8” (22) ø7/8” (22)

Liquid Pipe (

size-connection) in (mm) ø3/8” (9.52)

Refrigerant Type Type R410A

Charge Amount lb. (kg) 3.53 (1.6) 5.07 (2.3) 4.63 (2.1) 6.39 (2.9) 6.72 (3.05) 8.38 (3.8) 8.16 (3.7) 10.36 (4.7) 10.4 (4.7) 10.58 (4.8) 10.8 (4.9) 10.58 (4.8)

Total Maximum Piping

Length per system ft. (m 98.4(30) 98.4(30) 164 (50) 164 (50) 164 (50) 164 (50) 213 (65) 213 (65) 213 (65) 213 (65) 213 (65) 213 (65)

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