Carrier 38VYM Series Installation Manual Download Page 4

38VYM 

R-410A

GB - 3

E N G L I S H

Connections and operating limits

Connections

Table II: Operating limits

WARNING:
During heat pump operation the unit will undergo several defrost cycles to
eliminate ice that might collect on the outdoor unit at very low ambient
temperatures.
In these cycles, fan speed will automatically reduce or stop and cannot be
changed until defrost cycle is completed.

d.b. - dry bulb
w.b. - wet bulb

1)

38VYM-18: 15

°

C

2)

38VYM-18: –5

°

C

Cooling

Maximum conditions

Outdoor temperature 43

°

C

Indoor temperature 32

°

C d.b.; 23

°

C w.b.

Minimum conditions

Outdoor temperature 10

°

(1)

Indoor temperature 21

°

C d.b.; 15

°

C w.b.

Heating

Maximum conditions

Outdoor temperature 24

°

C d.b.; 18

°

C w.b.

Indoor temperature 27

°

C d.b.

Minimum conditions

Outdoor temperature –10

°

(2)

Mains power supply

Nominal single-phase voltage

230V ~ 50 Hz

Operating voltage limits

min. 198V – max. 264V

Outdoor unit

Indoor unit A1

Indoor unit A2

Indoor unit A3

Indoor unit A4

IMPORTANT:
Additional refrigerant charge is unnecessary.
This air conditioner is designed with chargeless specification.
For 38VYM-28 and 38VYM-32 models, connection of only one
indoor unit is not allowed.
Two or more units must be connected.

A4

A3

A2

A1

H

Table I: Connections

38VYM

18

28

32

Indoor unit

A1-A2

A1-A2-A3 A1-A2-A3-A4

Max. height difference

m

10

15

15

Pipe length

  Max m

20

25

25

per unit

Min

 m

2

2

2

Total pipe length

Max

 m

30

50

70

(Minimum number of bends possible)

Minimum number of indoor units

1

2

2

to be connected

(note)

Note: when only one indoor unit is connected, the connection pipe must have

a minimum length of 5 m.

Pipe diameter

Liquid

Gas

Indoor

(Liquid)

(Suction)

38VYM

unit

mm (inches)

mm (inches)

18

A1, A2

6.35 (1/4”)

9.52

(3/8”)

A1

6.35 (1/4”)

12.70 (1/2”) (note 1)

28

A2, A3

6.35 (1/4”)

9.52

(3/8”)

A1, A3

6.35 (1/4”)

12.70 (1/2”) (note 1)

32

A2, A4

6.35 (1/4”)

9.52

(3/8”)

Notes:

1)

When the indoor unit is as large as 009 or the model is 42HQM012,
use Ø 9,52 mm (3/8") pipes supplied with the flare tap adapter.

2)

All fittings are flare type.

3)

Use only refrigeration grade pipes, (Cu DHP type according to
ISO 1337), seamless, degreased, deoxidized and suitable for
operating pressures of at least 4200 kPa and with a burst pressure of
20700 kPa.

Under no circumstances must sanitary type copper pipe be used.

A4

A3

A2

H

A1

Summary of Contents for 38VYM Series

Page 1: ...38VYM L L O Y D S R E G I S TER QUALIT Y A S S U R A N C E IS O 900 1 R 410A INSTALLATION MANUAL...

Page 2: ...70 higher than R 22 Be sure that servicing equipment and replacement components are designed to operate with R 410A R 410A refrigerant cylinders are pink R 410A refrigerant cylinders have a dip tube...

Page 3: ...A mm 800 800 800 B mm 590 800 800 C mm 300 300 300 D mm 508 508 508 E mm 146 146 146 F mm 330 330 330 kg kg 50 64 65 38VYM 28 38VYM 32 Model 38VYM 18 28 32 A mm 100 100 100 B mm 250 250 250 C mm 500...

Page 4: ...s designed with chargeless specification For 38VYM 28 and 38VYM 32 models connection of only one indoor unit is not allowed Two or more units must be connected A4 A3 A2 A1 H Table I Connections 38VYM...

Page 5: ...owed for the mains supply circuit The mains supply must be connected to the outdoor unit Connect indoor and outdoor units with field supplied copper pipes by means of flare connections Use insulated s...

Page 6: ...wet before connection Disconnecting the refrigerant connections after installation as this will cause refrigerant leaks Connecting the condensate drain pipe to the outdoor unit Predominant head winds...

Page 7: ...otect copper tubes during storage Use tools designed for R 410A higher pressure Keep inside clean 2 stage vacuum pump Replace oil regularly No moisture No dust No leak No mineral oil Neat Dry nitrogen...

Page 8: ...the wall using the bracket kit Connect tubing in accordance with the limits shown on Table II Connections Finger tighten the fitting several turns then tighten it with a wrench by applying the tighten...

Page 9: ...vacuum with a vacuum pump connected to the service connection of the suction shut off valve as shown keeping the shut off valves completely shut until a 50 Pa 0 5 mbar vacuum has been reached Now ope...

Page 10: ...1 2 3 A1 A2 1 2 3 1 2 3 A3 A4 A3 1 2 3 Terminal box legend Earth L Live power supply N Neutral power supply 1 Connection indoor outdoor unit 2 Connection indoor outdoor unit 3 Connection indoor outdo...

Page 11: ...th L Live power supply N Neutral power supply 1 Connection indoor outdoor unit 2 Connection indoor outdoor unit 3 Connection indoor outdoor unit Indoor unit Outdoor unit Main switch Time delay fuse or...

Page 12: ...rs to indoor unit A4 This only refers to model 38VYM 32 Make certain the refrigerant pipes and the electrical connection lines between the indoor unit and the outdoor unit have the same colours and re...

Page 13: ...as flashing turns OFF Reconnect the red connector At the end of the test if there is a fault code the yellow LED D800 flashes and the red LEDs that indicate the defect remain ON see table The compress...

Page 14: ...posal in this case after removal the unit must be delivered to an appropriate disposal centre or the original dealer Shut off the liquid valves with the Allen wrench Turn the indoor units ON in coolin...

Page 15: ...io 9 20058 Villasanta MI Italy Tel 039 3636 1 The manufacturer reserves the right to change any product specifications without notice Order No 13812 74M10 January 2003 Supersedes Order No 13812 74M10...

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