Carrier 38YY...G Installation manual

38GL_M…G /
38YY(S)_M…G
INSTALLATION MANUAL
For operation and maintenance instructions of this unit as well as installation
instructions of the indoor unit, refer to the relevant manuals.
Contents
Page
Dimensions and weight .................................................................................................................
2
Minimum clearances .....................................................................................................................
3
Connections ..................................................................................................................................
3/5
Operating limits .............................................................................................................................
5
General information .......................................................................................................................
6
Warnings: avoid .............................................................................................................................
7
Refrigerant connections ................................................................................................................
8/10
Electrical connections ...................................................................................................................
11/16
Electrical data ................................................................................................................................
16
Pump down and check the refrigerant charge ..............................................................................
17/18
Unit maintenance and troubleshooting .........................................................................................
19
Diagnostics and testing .................................................................................................................
20
Accessories ...................................................................................................................................
20
ENGLISH
38GL_M…G / 38YY(S)_M…G
Cooling only and heat pump multisplit system outdoor units
R-410A – QUICK REFERENCE GUIDE
• R-410A refrigerant operates at 50%-70% higher pressures 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 which allows liquid to flow out of cylinder in an
upright position.
• In case of maintenance, R-410A systems should be charged with refrigerant in liquid phase.
Use a commercial type metering device in the manifold hose in order to vaporize the liquid
refrigerant before it enters in the unit.
• The R-410A, as for other HFC, is only compatible with oils chosen by the compressor
manufacturer. For this reason, for the type of oil to be used, always refer to the plate on the
compressor and the unit.
• A vacuum pump is not enough to remove moisture from oil.
• POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
• Never open system to atmosphere while it is under vacuum.
• When the system must be opened for service, break vacuum with dry nitrogen and replace filter
driers.
• Do not vent R-410A into the atmosphere.
• Use only Carrier matching indoor units (Table I).
GB - 1
38GL_M…G / 38YY(S)_M…G
Dimensions and weight
Table I
Cooling
only
models
Hi-Wall
42PHQ-N
38GL2M12G
38GL2M18G
38GL2M24G
38GL2M36G
38GL2M48G
38GL3M21G
38GL3M30G
38GL4M24G
Console
42PHQ-P
Cassette
42VMC-N
009 - 012
009 - 012
009 - 012
009
009
009
012
012
012
018
018
018
024
024
024
009 - 012
009 - 012
009 - 012
009 - 012 - 018 009 - 012 - 018 009 - 012 - 018
009 - 012
009 - 012
009 - 012
Heat
pump
models
Hi-Wall
42PHQ-N
38YY2M18G
38YY2M21G
38YY2M24G
38YY(S)2M36G
38YY(S)2M48G
009
009 - 012
012
018
024
Satellite
Power
40KMC-N
40SMC-N
40DMC
012
012
018
024
012
012 - 018
012
009 - 012
009
012
018
024
009 - 012
009 - 012 - 018
009 - 012
018
024
-
supply
230V ~ 50Hz
Console
Cassette
Satellite
42PHQ-P
42VMC-N
40KMC-N
40SMC-N
40DMC
009
009 - 012
012
018
024
009
009 - 012
012
018
024
012
012
018
024
009
009 - 012
012
018
024
018
024
Power
supply
230V ~ 50Hz
Dimensions and weight
A
A
A
A
B
B
B
B
E
D
E
E
D
F
kg
Heat pump
models
A
mm
B
mm
C
mm
D
mm
E
mm
F
mm
kg
GB - 2
kg
E
E
D
E
Ø 8,5
F
C
F
C
38GL2M18G
38GL2M24G
38GL3M21G
38YY2M18G
38GL2M12G
kg
D
Ø 8,5
Ø 8,5
C
Cooling only
models
A
mm
B
mm
C
mm
D
mm
E
mm
F
mm
E
E
38GL3M30G
38GL4M24G
38YY2M21G
38YY2M24G
F
C
38GL2M36G
38GL2M48G
38YY(S)2M36G
38YY(S)2M48G
38GL2M12G 38GL2M18G 38GL2M24G 38GL3M21G 38GL3M30G 38GL4M24G 38GL2M36G 38GL2M48G
660
504
220
390
135
250
800
590
300
508
146
330
800
590
300
508
146
330
800
590
300
508
146
330
800
803
300
508
146
330
800
803
300
508
146
330
800
1264
300
508
146
330
800
1264
300
508
146
330
39
55
58
58
75
69
109
112
38YY(S)2M36G
38YY(S)2M48G
38YY2M18G
38YY2M21G
38YY2M24G
800
1264
300
508
146
330
800
1264
300
508
146
330
800
590
300
508
146
330
800
803
300
508
146
330
800
803
300
508
146
330
112
119
59
69
71
38GL_M…G / 38YY(S)_M…G
Minimum clearances and connections
ENGLISH
Minimum clearances
D
A
C
B
E
A
E
F
F
Models
38GL2M18G
38GL2M24G
38GL3M21G
38GL3M30G
38GL4M24G
38YY2M18G
38GL2M12G
A
B
C
D
E
F
D
38GL2M36G
38GL2M48G
38YY2M21G
38YY2M24G
38YY(S)2M36G
38YY(S)2M48G
mm
50
100
100
mm
250
250
250
mm
500
500
500
mm
50
50
100
mm
470
470
670
mm
400
400
400
Connections
A1
A1
A1
A2
A1
A
A2
A2
B1
A2
B
B
B
B2
38GL2M12G
38GL2M18G
38GL2M24G
38GL3M21G
38GL3M30G
38GL4M24G
A
A
A
A
B
B
B
B
38GL2M36G
38GL2M48G
38YY2M18G
38YY2M21G
38YY2M24G
38YY(S)2M36G
38YY(S)2M48G
GB - 3
38GL_M…G / 38YY(S)_M…G
Connections
Model
38GL
Pipe diameter
Liquid
Gas
(Liquid)
(Suction)
mm (inches)
mm
(inches)
Indoor
unit
Model
38YY(S)
Indoor
unit
Pipe diameter
Liquid
Gas
(Liquid)
(Suction)
mm (inches)
mm
(inches)
2M12G
A1
A2
6.35
6.35
(1/4")
(1/4")
9.52
12.70
(3/8")
(1/2") (note 1)
2M18G
A
B
6.35
6.35
(1/4")
(1/4")
9.52
9.52
(3/8")
(3/8")
2M18G
A
B
6.35
6.35
(1/4")
(1/4")
9.52
9.52
(3/8")
(3/8")
2M21G
A
B
6.35
6.35
(1/4")
(1/4")
9.52
12.70
(3/8")
(1/2")
2M24G
A
B
6.35
6.35
(1/4")
(1/4")
12.70
12.70
(1/2")
(1/2")
2M24G
A
B
6.35
6.35
(1/4")
(1/4")
12.70
12.70
(1/2")
(1/2")
3M21G
A1
A2
B
6.35
6.35
6.35
(1/4")
(1/4")
(1/4")
9.52
12.70
9.52
(3/8")
(1/2") (note 1)
(3/8")
2M36G
A
B
6.35
6.35
(1/4")
(1/4")
12.70
12.70
(1/2")
(1/2")
2M48G
A
B
6.35
6.35
(1/4")
(1/4")
12.70
12.70
(1/2")(note 2)
(1/2")(note 2)
3M30G
A1
A2
B
6.35
6.35
6.35
(1/4")
(1/4")
(1/4")
9.52
12.70
12.70
(3/8")
(1/2") (note 1)
(1/2")
4M24G
A1
A2
B1
B2
6.35
6.35
6.35
6.35
(1/4")
(1/4")
(1/4")
(1/4")
9.52
12.70
9.52
12.70
(3/8")
(1/2") (note 1)
(3/8")
(1/2") (note 1)
2M36G
A
B
6.35
6.35
(1/4")
(1/4")
12.70
12.70
(1/2")
(1/2")
2M48G
A
B
6.35
6.35
(1/4")
(1/4")
12.70
12.70
(1/2") (note 2)
(1/2") (note 2)
Notes
1) When the indoor unit is as large as 009, use Ø 9,52 mm (3/8") pipes supplied with the flare tap adapter.
Important: do not connect the indoor unit size 012 to circuit B.
2) When the indoor unit is provided with a 15.87 mm (5/8") refrigerant connection, use Ø 12.70 mm pipes supplied with flare tap adapter.
3) All fittings are flare type.
4) 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.
Under no circumstances must sanitary type annealed copper pipe be used.
햳 A / A1
햴 A2
L1
햶 B2
햵 B / B1
L4
L3
L2
H
H
H
H
햲
L3
햲
L2
H
L1
햳 A/A
GB - 4
1
H
H
L4 H
햶 B2
1
햵B/B
햴 A2
햲
햳
햴
햵
햶
Outdoor unit
Indoor unit circuit A
Indoor unit circuit A
Indoor unit circuit B
Indoor unit circuit B
38GL_M…G / 38YY(S)_M…G
Connections and operating limits
ENGLISH
Table II: Connections
Model
38GL
2M12G
2M18G
2M24G
3M21G
3M30G
4M24G
2M36G
2M48G
Hm
5
5
5
5
5(1) / 10 (2)
5
10
15
Max. pipe
L1 m
–
15
15
–
–
–
30
40
length
L2 m
–
–
–
–
–
–
30
40
L3 m
–
15
15
15
30
–
–
–
L1 + L2 m
15
–
–
15
15
30
60
80
Max. height difference
L3 + L4 m
–
–
–
–
–
30
–
–
Min. pipe
L1 m
–
1.5
1.5
–
–
–
3.0
3.0
length
L2 m
Difference max
–
–
–
–
–
–
–
–
L3 m
L1 + L2 m
L3 + L4 m
L1 - L2 m
–
1.5
–
5
1.5
–
–
–
1.5
–
–
–
1.5
1.5
–
5
1.5
1.5
–
5
–
1.5
1.5
5
3.0
–
–
–
3.0
–
–
–
L3 - L4 m
–
–
–
–
–
5
–
–
Model
YY(S)
2M36G
2M48G
2M18G
2M21G
Hm
10
15
5
5
5
L1 m
30
40
15
15
15
L2 m
30
40
15
15
15
Max. height difference
Max. pipe length
L1 + L2 m
60
80
30
30
30
L1 m
3,0
3,0
3,0
3,0
3,0
L2 m
3,0
3,0
3,0
3,0
3,0
Min. pipe length
Note
2M24G
(1): Circuit A1 and A2
(2): Circuit B
Table III: Operating limits (1)
Outdoor temperature °C Indoor temperature °C
Cooling (2)
Maximum conditions
Applicable
d.b.
w.b.
d.b.
w.b.
43
–
32
23
All multisplit units
21 (3)
–
21
15
38GL2M18G; 38GL2M24G; 38GL3M21G
38GL2M12G
38GL3M30G; 38GL4M24G
Minimum conditions
Heating
(2)
Maximum conditions
Minimum conditions
15
–
21
15
38GL2M36G(4); 38GL2M48G(4);
38YY2M18G; 38YY2M36G;38YY2M48G;
38YY2M21G;38YY2M24G.
-10
–
21
15
38YYS2M36G;38YYS2M48G.
24
18
27
–
All heat pump
-15
-17
20
–
multisplit units
Notes: (1) Data referred to the outdoor unit only.
(2)
According to prEN 14511-5.
(3)
Thanks to the high pressure regulation kit, the unit can also be
used with outdoor temperatures up to +10°C (see table VI
"Accessories" for kit availability).
(4)
Thanks to the high pressure regulation kit, the unit can also be
used with outdoor temperatures up to -10°C (see table VI
"Accessories" for kit availability).
d.b. - dry bulb ;
WARNING:
During heat pump operation unit will undergo several defrost cycles to
eliminate ice that might possibly collect on the outdoor unit in very low
ambient temperatures.
In these cycles, fan speed will automatically reduce and cannot be
varied until defrost cycle is completed.
w.b. - wet bulb
GB - 5
38GL_M…G / 38YY(S)_M…G
General information
Read this instruction manual thoroughly before starting the
installation.
R-410A systems operate at higher pressures than standard
R-22 systems. Do not use R-22 service equipment or
components on R-410A equipment.
• This unit complies with low-voltage (EEC/73/23) and electromagnetic compatibility (EEC/89/336) directives.
• Check that the impedance of the mains power supply is in
conformance with the unit power input indicated in the
electric data table V (EN 61000-3-11).
• The installation must be carried out by a qualified installer.
• Follow all current national safety code requirements. In particular
ensure that a properly sized and connected ground wire is in place.
• Check that voltage and frequency of the mains power supply are
those required; the available power must be adequate to operate
any other possible appliances connected to the same line.
Also ensure that national safety code requirements have been
followed 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 seamless
refrigeration grade pipe only, (Cu DHP type according to
ISO1337), degreased and deoxidized, suitable for operating
pressures of at least 4200 kPa and for burst pressure of at
least 20700 kPa. Under no circumstances must sanitary type
copper pipe be used.
• After installation thoroughly test the system operation and explain
all system functions to the owner.
• Leave this manual with the owner for consultation during future
periodic maintenance.
• Use this unit only for factory approved applications: the unit is
suitable for outdoor installation.
• This installation manual describes the installation procedures of
the outdoor unit of a residential split system consisting of two units
manufactured by Carrier. Consult factory or a qualified system
engineer prior to connecting this unit to any other manufacturer's
indoor unit. Coupling units which have different control systems,
may cause irreversible damage and void the warranty protection.
The manufacturer declines any liability for system malfunction
resulting from unapproved coupling.
IMPORTANT:
During the unit installation make first refrigerant connections
and then electrical connections. If unit is uninstalled first
disconnect electrical cables, then refrigerant connections.
WARNING:
Disconnect the mains power supply switch before servicing
the system or handling any internal parts of the unit.
All mains supply circuits must be disconnected.
• The manufacturer declines any liability for damage resulting from
modifications or errors in the electrical or refrigerant connections.
• Failure to observe the installation instructions or use of the unit
under conditions other than those indicated in Table III “Operating
limits”, will immediately void the unit warranty.
• Failure to observe electric safety codes may cause a fire hazard in
case of short circuits.
• Inspect equipment for damage due to improper transportation or
handling: file an immediate claim with the shipping company.
Do not install or use damaged units.
• In case of any malfunctioning turn the unit off, disconnect the
mains power supply and contact a qualified service engineer.
• This equipment contains R-410A refrigerant, a substance that is
not depleting the ozone layer.
• All of the manufacturing and packaging materials used for
your new appliance are compatible with the environment and
can be recycled.
• Dispose of the packaging material in accordance with local
requirements.
• This equipment contains refrigerant that must be disposed of in a
proper manner. When disposing of the unit after its operational
life, remove it carefully. The unit must then be delivered to an
appropriate disposal center or to the original equipment dealer.
GB - 6
• Carefully recover refrigerant within this unit before final disposal or
when servicing. Never vent refrigerant to atmosphere.
Use approved recovery equipment for R-410A refrigerant.
Do not use R-22 equipment.
Choosing the installation site
Positions to avoid:
• Exposed to direct sun.
• Too close to sources of heat radiation, vapour or flammable gas.
• Particularly dusty areas.
Recommendations:
• Choose a position protected from opposing winds.
• Choose a position sheltered from direct sun.
• Choose an area where air outlet and unit noise will not bother
your neighbours.
• Choose a position that allows for the clearances required.
• Floor structure should be adequately strong to support unit weight
and minimize vibration transmission.
• Consider a position which will not obstruct passageways or doors.
A mm
B mm
Unit installation
Model
2M12G
All the other
models
A
390
B
250
508
330
�
� No. 4 Ø 8 mm pins.
� Protrusion height from the
support surface max. 20 mm.
• Fix the unit with locally purchased bolts buried in the block to
prevent overturning due to strong gusts of wind.
햲
햳
햴
햲 100 mm min
햳 20 mm gradient
햴 Gravel-filled trench
• For heat pump models, unit must be adequately raised above
floor surface.
햵
햶
햵 Drain fitting
햶 Vinyl pipe
• To empty the condensate water to a drain while operating in
heating mode, insert the drain fitting into the hole underneath on
the centre of the base and use a vinyl pipe with a 16 mm inside
diameter. It must not be used at temperatures below 0°C (not
available for low temperature versions).
Snow
• If the unit is installed in areas where heavy snowfalls may occur, it
is necessary to raise its level at least 200 mm above the usual
snow level or alternatively to use the outdoor unit bracket kit.
38GL_M…G / 38YY(S)_M…G
Warnings: avoid....
ENGLISH
Disconnecting the refrigerant connections after installation:
thiis will cause refrigerant leaks.
Connecting the condensate drain pipe to the outdoor unit.
Excessive height difference between indoor and outdoor unit (see
Table II "Connections"). Excessive distance between indoor and
outdoor units. (see Table II "Connections").
Predominant head winds.
Unnecessary turns and bends in the connecting pipes.
Multiple unit installation with units facing each other.
Any slack in the electrical connections.
Insulating the connecting pipes only partially, which will cause
dripping. Dripping into passageways.
Flattening or kinking of refrigerant or condensate pipes.
Any obstruction of the unit air outlet and intake or any obstacle that
is too close (see minimum clearances required).
Installation on grassy ground or soft surfaces (in these cases a
solid foundation must be included).
Soiling of pipe ends.
Allowing piping to get wet before connection.
GB - 7
38GL_M…G / 38YY(S)_M…G
Refrigerant connections
No moisture.
No dust.
Charge liquid-no gas.
No leak.
No mineral oil.
Copper tubes during storage.
Neat.
1/2” UNF (R-410A)
7/16” UNF (R-22)
Use tools designed for R-410A higher pressure.
Keep inside clean.
Dry nitrogen brazing.
Min.
– 100 kPa
(– 755 mmHg)
Vacuum.
GB - 8
2-stage vacuum pump. Replace oil regularly.
38GL_M…G / 38YY(S)_M…G
Refrigerant connections
ENGLISH
Flaring the ends of the tubing
Remove protective caps from copper tube ends.
Position tube end downward, cut the tube to the requested length
and remove the burrs with a reamer.
Do not leave system open to atmosphere any longer than
minimum required for installation.
Oil in the compressor is extremely susceptible to moisture
absorption.
Always keep ends of tubing sealed during installation.
Charge refrigerant only in liquid phase (bottle turned upside down
or using the specific connection on bottle; see pages 5 and 8).
L
L
Remove flare nuts from the unit connections and place them on
the tube end.
Flare the tube with the flaring tool.
Where required, the unit must be charged with additional
refrigerant.
Additional charge must be added using electronic scales and the
service port (5/16") on the suction line.
Connection to unit
Flare end must not have any burrs or imperfections.
The length of the flared walls must be uniform.
햴
햴 Adjustable wrench
or torque wrench
2
Insufficient tightening torque will cause gas leaks.
Overtightening the fittings will damage the tube flaring and
cause gas leaks.
1
The unit can be installed:
햲 on the floor;
햳 on 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 tightening torque indicated in the table.
Valve
1/4”
3/8”
1/2”
Flare nut
Wrench mm
Nm
17
18
22
42
26
55
• Make certain the refrigerant pipes and the electrical
connection lines between the indoor and the outdoor unit have
the same colours and reference codes (A, A1, A2, B, B1, B2)
using the special adhesive references supplied.
Tightening torque
Valve cap
Pressure port cap
Wrench mm
Nm
Wrench mm
Nm
23
20
18
16 - 18
23
20
18
16 - 18
29
40
18
16 - 18
Valve needle
Wrench mm
Nm
Allen (hex.) 5
9
Allen (hex.) 5
9
Allen (hex.) 5
13
Pressure port
Wrench mm
Nm
–
0.34
–
0.34
–
0.34
GB - 9
38GL_M…G / 38YY(S)_M…G
Refrigerant connections
!
햸
햶 햹
햸
햷
햻
햻
햸
햹
햻
햵
햺
햻
햸
햹
햸
햳햲
햴
햹
햹
햴
햽
햲
햳
햴
햵
햶
햷
햸
햹
햺
햻
햽
햾
Three-way valve
Needle valve
Valve cap
Valve needle
Two-way valve
Allen (hex. head) wrench
Gas line (large diameter)
Liquid line (small diameter)
Flare nut
Indoor unit
Outdoor unit
Vacuum pump
햾
Air drain
Repeat the air drain procedure for every indoor unit installed.
헁
Use only a vacuum pump to purge air from the piping.
NEVER use the system compressor as a vacuum pump.
햿
NEVER use the unit refrigerant gas to purge the connecting
pipes.
No additional refrigerant has been provided in the unit for this
purpose.
Remove the caps from the two and three-way valves.
Create a 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 -100 Pa (-1 bar) vacuum
has been reached.
Now open the two-way valve for 3 sec., then quickly shut it to
check for possible leaks.
!
After the leak check, fully open the two and three-way
valves. Do not go beyond the valve stop limit.
Replace caps and check for leaks.
GB - 10
헀
햿 Pipe
헀 Pipe insulation
헁 Fastening tape
Once all connections have been completed, check for leaks by
using a leak detector specific for HFC refrigerants.
Finally wrap the valves and pipes with anti-condensate insulation
and tighten this with tape, without exerting too much pressure on
the insulation.
Repair and cover any possible cracks in the insulation.
Fix the pipes to the wall with hooks or conduits.
38GL_M…G / 38YY(S)_M…G
Electrical connections
ENGLISH
Mod. 38GL2M12G
A2
쐃
L N NY
A1
쐃
L N NY
R C Y
A2
230V ~ 50Hz
L N R C Y
A1
쐋 쐏
L N R C Y R C Y
A1
A2
햲
쐇
햵햵
Mod. 38GL2M18G - 38GL2M24G
B
쐃
L N NY
R C Y
A2
A
햲
쐃
L N NY
230V ~ 50Hz
L N R C Y
A1
햵햵
쐋 쐏
L N R C Y R C Y
A
B
쐇
WARNING!
The system power supply must always be made
through the outdoor unit.
If the indoor units are provided with heaters, their
power supply must be ensured by indoor sections.
10
120
1
Terminal box legend
L
N
R
C
Y
Earth
Live power supply
Neutral power supply
Live connection indoor/outdoor unit
Neutral connection indoor/outdoor unit
Compressor interlocking contact
10
100
4
햲 Mains supply connecting cable (field wiring).
햵 Connecting cable Outdoor unit – Indoor unit
(R - C - Y - ) - (field wiring).
쐃 Indoor unit
쐇 Outdoor unit
쐋 Main switch
쐏 Time-delay fuse or circuit breaker
(see table V "Electrical data").
GB - 11
38GL_M…G / 38YY(S)_M…G
Electrical connections
Mod. 38GL3M21G
A2
B
쐃
L N N Y
A1
쐃
R C Y R C Y
A2
B
L N N Y
230V ~ 50Hz
L N R C Y
A1
쐃
L N N Y
쐋 쐏
L N R C Y R C Y R C Y
A1
A2
B
햲
햵
햵
햵
쐇
Mod. 38GL3M30G
L N R C Y
R C Y
A1
L N R C Y
A2
B
쐃
A2
L N NY
햲
햵햵
햲
B
햵
R C Y
쐃
A1
쐃
쐋 쐏
230V ~ 50Hz
230V ~ 50Hz
L N NY
쐋 쐏
L N R C Y
B
L N R C Y R C Y
A1
A2
WARNING!
쐇
The system power supply must always be made
through the outdoor unit.
If the indoor units are provided with heaters, their
power supply must be ensured by indoor sections.
10
120
1
Terminal box legend
L
N
R
C
Y
Earth
Live power supply
Neutral power supply
Live connection indoor/outdoor unit
Neutral connection indoor/outdoor unit
Compressor interlocking contact
GB - 12
10
100
4
햲 Mains supply connecting cable (field wiring)
햵 Connecting cable Outdoor unit – Indoor unit
(R - C - Y - ) - (field wiring)
쐃 Indoor unit
쐇 Outdoor unit
쐋 Main switch
쐏 Time-delay fuse or circuit breaker
(see table V "Electrical data")
38GL_M…G / 38YY(S)_M…G
Electrical connections
ENGLISH
Mod. 38GL4M24G
L N
R C Y
A1
R C Y
B2
R C Y R C Y
A2
B1
쐃
A2
쐃
L N N Y
쐃
A1
쐃
L N N Y
햵 햵
햵 햵
230V ~ 50Hz
햲
B1
L N N Y
B2
L N N Y
쐋 쐏
R C Y R C Y R C Y R C Y
A1
A2
B1
B2
L N
쐇
Mod. 38GL2M36G - 38GL2M48G
L N R C Y
L N R C Y
A
B
A
쐃
B
R C Y
햲
햵
쐋 쐏
R C Y
230V ~ 50Hz
햵
230V ~ 50Hz
햲
쐃
쐋 쐏
WARNING!
The system power supply must always be made through
the outdoor unit by means of two independent mains
power supplies.
If the indoor units are provided with heaters, their power
supply must be ensured by indoor sections.
Terminal box legend
10
L N R C Y
A
쐇
120
1
Earth
L
Live power supply
N
Neutral power supply
R
Live connection indoor/outdoor unit
C
Neutral connection indoor/outdoor unit
Y
Compressor interlocking contact
PCB External electronic card
10
L N R C Y
B
100
4
햲 Mains supply connecting cable
(field wiring)
햵 Connecting cable Outdoor unit – Indoor unit
(R - C - Y - ) - (field wiring)
쐃 Indoor unit
쐇 Outdoor unit
쐋 Main switch
쐏 Time-delay fuse or circuit breaker
(see table V "Electrical data")
GB - 13
38GL_M…G / 38YY(S)_M…G
Electrical connections
Mod. 38YY2M18G - 38YY2M21G - 38YY2M24G
R C Y O W2
R C Y O W2
A
B
L N
햲
햴햳
햳햴
쐃
A
쐃
230V ~ 50Hz
L N N Y O W2
B
L N N Y O W2
쐋 쐏
R C Y O W2
A
L N
R C Y O W2
B
쐇
WARNING!
The system power supply must always be made through the outdoor
unit.
If the indoor units are provided with heaters, their power supply must
be ensured by indoor sections.
Indoor units which are connected to the heat pump units need the
“Multisplit” configuration by remote controller.
The two heat pump circuits can operate simultaneously only in the
same mode (all circuits operating in the Cooling or Heating mode).
Terminal box legend
L
N
R
C
Y
O
W2
Earth
Live power supply
Neutral power supply
Live connection indoor/outdoor unit
Neutral connection indoor/outdoor unit
Compressor interlocking contact
Reversing valve control (Heat pump only)
Outdoor fan signal (Heat pump only)
GB - 14
10
120
1
10
100
2
3
햲 Mains supply connecting cable (field wiring)
햳 Connecting cable Outdoor unit – Indoor unit
) - (field wiring)
(R - C 햴 Connecting cable Outdoor unit – Indoor unit
(Y - O - W2) - (field wiring)
쐃 Indoor unit
쐇 Outdoor unit
쐋 Main switch
쐏 Time-delay fuse or circuit breaker
(see table V "Electrical data")
38GL_M…G / 38YY(S)_M…G
Electrical connections
ENGLISH
Mod. 38YY(S)2M36G - 38YY(S)2M48G
L N R C Y O W2
L N R C Y O W2
A
B
햳햴
햲
햳햴
쐃
쐃
R C Y O W2 S
R C Y O W2 S
쐋 쐏
230V ~ 50Hz
230V ~ 50Hz
햲
L N R C Y O W2
A
쐋
쐇
L N R C Y O W2
B
PCB
WARNING!
The system power supply must always be made through the outdoor
unit by means of two independent mains power supplies.
If the indoor units are provided with heaters, their power supply must
be ensured by indoor sections.
Indoor units which are connected to the heat pump units need the
“Multisplit” configuration by remote controller.
The two heat pump circuits can operate simultaneously only in the
same mode (all circuits operating in the Cooling or Heating mode).
The system will not operate if circuit “A” is not energized.
Terminal box legend
10
Earth
L
Live power supply
N
Neutral power supply
R
Live connection indoor/outdoor unit
C
Neutral connection indoor/outdoor unit
Y
Compressor interlocking contact
PCB External electronic card
O
Reversing valve control (Heat pump only)
W2 Outdoor fan signal (Heat pump only)
120
1
10
100
2
3
햲 Mains supply connecting cable (field wiring)
햳 Connecting cable Outdoor unit – Indoor unit
(R - C - ) - (field wiring)
햴 Connecting cable Outdoor unit – Indoor unit
(Y - O - W2) - (field wiring)
쐃 Indoor unit
쐇 Outdoor unit
쐋 Main switch
쐏 Time-delay fuse or circuit breaker
(see table V "Electrical data")
GB - 15
38GL_M…G / 38YY(S)_M…G
Electrical connections and electrical data
• Make electrical connections between units prior to proceeding to
mains supply unit connection.
• Before proceeding with the unit connection to the mains supply
locate live L and neutral N, then make connections as shown in
the wiring diagram.
• According to the installation instructions, the disconnecting
switches from the mains power supply should have a contact gap
(4 mm) such that total disconnection can be ensured under the
conditions provided for by overvoltage class III.
• The mains supply indoor unit – outdoor unit connecting cable
must be H07 RN-F (60245IEC66), type synthetic rubber insulation
with neoprene coating.
• Make certain the refrigerant pipes and the electrical
connection lines between the indoor unit and the outdoor
unit have the same colours and reference codes (A, A1, A2,
B, B1, B2) using the special adhesive references supplied.
Note:
All field electrical connections are the responsibility of the
installer.
Remove electric box cover.
Connect the wires to the terminals according to the wiring diagram
and firmly tighten.
IMPORTANT:
Make ground connection prior to any other electrical
connections.
Note:
After connections have been completed, replace electric box cover.
Table V: Electrical data
Power input
Starting
current
(3)
Cooling
(2)
Main power
connections (5)
Heating
Nominal conditions
Nominal conditions
Peak conditions
Peak conditions
Time230V ~ 50Hz
230V ~ 50Hz
198V ~ 50Hz
198V ~ 50Hz
PrEN14511-5
PrEN14511-5
PrEN14511-5
PrEN14511-5
delay fuse
indoor 27°C d.b. 19°C w.b. indoor 32°C d.b. 23°C w.b. indoor 27°C d.b. 19°C w.b.
indoor 27°C
gL type
outdoor 35°C d.b. 24°C w.b. outdoor 43°C d.b. 32°C w.b. outdoor 35°C d.b. 24°C w.b. outdoor 24°C d.b. 18°C w.b.
Wire
size
(4-5)
2
Indoor/Outdoor unit
connections
Wire size (4-5)
R
C
O
W2
---
Cooling only
A
A
W
A
W
A
W
A
W
A
mm
38GL2M12G
30
6.6
1460
9.5
1850
---
---
---
---
16
2.5
1.0 1.0 1.0 1.0 ---
38GL2M18G
30
9.0
2040
11.7
2500
---
---
---
---
20
2.5
1.0 1.0 1.0 1.0 ---
---
38GL2M24G
30
10.9
2560
16.4
3250
---
---
---
---
25
2.5
1.0 1.0 1.0 1.0 ---
---
30
10.8
2450
16.3
3180
---
---
---
---
25
2.5
1.0 1.0 1.0 1.0 ---
---
30
5.8
1310
8.3
1600
---
---
---
---
16
2.5
1.0 1.0 1.0 1.0 --1.0 1.0 1.0 1.0 ---
38GL3M21G
(7)
38GL3M30G
(8)
mm
Y
2
50
9.0
2020
12.4
2420
---
---
---
---
20
2.5
38GL4M24G
30
11.3
2580
16.6
3230
---
---
---
---
25
2.5
1.0 1.0 1.0 1.0 ---
---
38GL2M36G(7)
50
8.7
2000
12.1
2410
---
---
---
---
20
2.5
1.0 1.0 1.0 1.0 ---
---
38GL2M48G(7)
60
11.0
2430
15.3
3000
---
---
---
---
25
2.5
1.0 1.0 1.0 1.0 ---
---
Heat pump
A
A
W
A
W
A
W
A
W
A
mm 2
mm 2
38YY2M18G
50
8.5
1920
11.7
2300
7.9
1810
10.5
2060
20
2.5
1.0 1.0 1.0 1.0 1.0 1.0
38YY2M21G
55
9.5
2180
14.2
2760
10.1
2280
15.0
2880
25
2.5
1.0 1.0 1.0 1.0 1.0 1.0
60
10.6
2470
15.9
3140
10.5
2410
15.7
3060
25
2.5
1.0 1.0 1.0 1.0 1.0 1.0
38YY(S)2M36G
38YY2M24G
(6)
50
8.3
1920
11.7
2370
8.0
1830
11.7
2300
20
2.5
1.0 1.0 1.0 1.0 1.0 1.0
38YY(S)2M48G
(6)
60
10.6
2320
12.5
2730
12.5
2780
14.6
2810
25
2.5
1.0 1.0 1.0 1.0 1.0 1.0
Notes: 1.
2.
3.
4.
5.
6.
7.
8.
9.
GB - 16
Unit is suitable for outdoor installation.
Data referred to the outdoor unit only.
Starting current duration is usually lower than 1 sec.
The section of the cables refers to cables with a maximum length of 15 metres.
The mains supply indoor unit – outdoor unit connecting cable must be H07 RN-F (60245IEC66), type synthetic rubber insulation with
neoprene coating.
If the indoor unit is provided with an electric heater, consult indoor unit installation manual for correct sizing of the wires.
Electrical input refer to each one of the two mains supplies.
Circuit A1 - A2
Circuit B
38GL_M…G / 38YY(S)_M…G
Pump Down and check the refrigerant charge
ENGLISH
Refrigerant charge control
38GL2M12G
38GL2M18G - 38GL2M24G - 38GL2M36G - 38GL2M48G
햾
헁
햽
햲
헂
햲
햻
햻
햷
햵
햳
햳
햺
햹
햶
햵
햷
햴
38GL3M21G - 38GL3M30G
헂
햾
햶
햸
햽
햲
햻
햲 Outdoor unit
Gas
햳 Circuit A compressor
햴 Circuit B compressor
햷
햴
햵
햸
햶
Liquid + Gas
햵 Outdoor unit coil
햶 Filter
햺
햷 Expansion device (Capillary)
햹
햹 Distributor
Liquid
햸 Expansion device (Accurater)
햺 Solenoid valve
햻 Service valve
햽 Indoor unit coil A1
햾 Indoor unit coil A2
햳
햿 Indoor unit coil B1
헀 Indoor unit coilB2
헁 Indoor unit coil A
햶
햷
헂 Indoor unit coil B
Pump Down
Check the refrigerant charge
Pump down is an operation intended to collect all the system
refrigerant in the outdoor unit.
This operation must be carried out before disconnecting the
refrigerant tubing in order to avoid refrigerant loss to the
atmosphere, if it becomes necessary to disconnect the
refrigerant connections for unit repair, removal or disposal; in
this case, after removal, unit must be delivered to an
appropriate disposal centre or the original dealer.
• This check becomes necessary after any refrigerant leak due to
incorrect connection, or after replacement of the compressor.
Shut off the liquid valve with the Allen wrench.
Turn the system on in cooling with fan operating at high velocity.
(Compressor will immediately start, provided 3 minutes have
elapsed since the last stop).
After 2 minutes of operation, shut the suction valve with the same
wrench.
Turn the system off and switch mains supply off.
Disconnect tubing.
After disconnection, protect valves and tubing ends from dust.
• The best method to correctly charge refrigerant is to
completely empty the refrigerant circuit using refrigerant
recovery equipment.
Then charge the exact quantity of refrigerant according to the
data shown on the unit nameplate, using a balance
(see page 8).
• R-410A refrigerant cylinders contain a dip tube which allows
liquid refrigerant to flow from the cylinder in an upright
position.
Charge R-410A units with cylinder in upright position and a
commercial-type metering device in manifold hose in order to
vaporize the liquid refrigerant before it enters in the unit.
Charge refrigerant into suction-line.
GB - 17
38GL_M…G / 38YY(S)_M…G
Check the refrigerant charge
Refrigerant charge control
38GL4M24G
햿
햾
햲 Outdoor unit
햳 Circuit A compressor
햴 Circuit B compressor
헀
햵 Outdoor unit coil
햽
햲
햶 Filter
햷 Expansion device (Capillary)
햸 Expansion device (Accurater)
햻
햹 Distributor
햺 Solenoid valve
햻 Service valve
햽 Indoor unit coil A1
햷
햴
햾 Indoor unit coil A2
햿 Indoor unit coil B1
햺
헀 Indoor unit coilB2
헁 Indoor unit coil A
헂 Indoor unit coil B
햹
햵
Gas
Liquid + Gas
햳
햶
Liquid
햷
Heat pump unit
Cooling cycle mod. 38YY - 38YY(S)
Heating cycle mod. 38YY - 38YY(S)
헁
헂
햲
헁
햲
햻
햻
햳
햳
햵
햵
햴
햴
햶
GB - 18
헂
햸
햶
햶
햸
햶
38GL_M…G / 38YY(S)_M…G
Unit maintenance and troubleshooting
Unit maintenance
The following maintenance operations must be carried out by
qualified personnel.
Cleaning the coil
When necessary, proceed as follows for more careful cleaning of
the coil:
Switch the mains supply OFF.
Remove unit top cover by losening holding screws and lifting the
cover.
ENGLISH
• Mains voltage wrong (too high or too low).
• Condenser coil obstructed; remove obstructions.
• Outdoor fan off; check cause and repair.
• Run capacitor faulty; check and replace.
• Refrigerant circuit clogged; check and remove obstructions.
• Faulty reversing valve; replace it.
• Expansion device clogged or covered with ice; drain refrigerant
(see note 1), evacuate and recharge.
Compressor runs continuously:
• Unit selected too small for actual air conditioning needs.
• Indoor temperature selection too low (cooling) or too high (heat
pump heating); check temperature selection.
• Refrigerant charge low; check and add refrigerant.
• Condenser fan faulty; replace.
• Air or other non condensable gases in the circuit; drain
refrigerant (see note 1), evacuate and recharge.
• Obstructions at air intake or dirty indoor unit filters; remove
obstruction or clean filter.
Ice on the outdoor coil (heat pump heating):
• Outdoor fan is off; check for cause and repair.
• Wrong electrical connection between indoor and outdoor units;
check and repair the electric connections.
• Check the correct positioning and connection of the outdoor coil
sensors.
Discharge pressure too high:
• Outdoor coil dirty or obstructed; clean or remove obstructions.
• Condenser fan faulty; replace.
• Refrigerant charge too high; drain some refrigerant (see note 1).
• Air or other non-condensable gases in the circuit; drain
refrigerant (see note 1), evacuate and recharge.
Carefully clean the coil with a vacuum cleaner from inside to
outside.
With the same vacuum cleaner, dust the inside of the fan
compartment and the fan blades. Avoid any damage to the blades
which may cause future vibrations and noise.
Replace the unit cover and tighten the screws.
If the unit is started for the first time after a long period
during which it has been disconnected from the mains power
supply (for heat pump units only).
Energize the system by pressing the main switch, but do not start
the system (the remote controller must be in the OFF position).
Do not de-energize the unit during the operating season.
Troubleshooting
Before starting troubleshooting check the correct operation
of all fuses installed on the electronic cards (if any).
Compressor and fan of the outdoor unit do not start:
• Unit is not energized; check the mains power connections.
• Main switch OFF; check and put to the ON position.
• Main switch fuses have blown; replace.
• Wait for 3 minutes; compressor cycling protection is on.
• Accessory pressure switch open; check and eliminate cause.
• Mains voltage too low.
• Electrical connections loose or wrong; check and repair.
Compressor will not start, but outdoor fan is running:
• Electrical connections of compressor loose or wrong; check and
repair.
• Compressor burnt out, seized or protection device on; check for
the cause and replace compressor if necessary.
• Faulty run capacitor for the single-phase models; replace it.
Compressor starts, but stops due to its overtemperature
protection (other than stops caused by the normal operation
of the thermostat):
• Wrong refrigerant charge (excessive or low) or air or other non
condensable gases in the circuit; drain refrigerant (see note 1),
evacuate and recharge.
Discharge pressure too low:
• Refrigerant charge too low; add refrigerant.
• Outdoor coil dirty or obstructed; clean or remove obstructions.
• Indoor unit air filter dirty; clean filter.
Suction pressure too high:
• Refrigerant charge too high; drain some refrigerant (see note 1).
• Internal high pressure relief valve open; check for cause and
repair.
Suction pressure too low:
• Refrigerant charge too low; add refrigerant.
• Evaporator coil covered with ice; see the following points.
• Air circulation on the evaporator unit not sufficient; check for the
cause and repair.
• Expansion device or suction line clogged: check and repair.
• Outdoor unit fan does not stop during defrosting (heat pump
heating); check the connections.
Outdoor fan motor runs always at low speed:
• The cable is not connected to the card; check connections
between the temperature sensor and the card.
• Faulty temperature sensor; replace the sensor.
• Faulty electronic card; replace it.
Outdoor fan motor runs always at high speed:
• Short-circuited temperature sensor; replace the sensor.
• Faulty electronic card; replace it.
Outdoor fan does off or starts and stops due to its
overtemperature protection:
• Faulty fan motor capacitor; replace it.
• Electrical connections to the fan motor are loose; check and
tighten connections.
• Fan motor burnt-out; replace it.
• Fan motor bearings seized; check for cause and repair.
• Expansion device clogged or covered with ice; drain refrigerant
(see note 1), evacuate and recharge.
Note 1:
Do not release refrigerant to the atmosphere; use
refrigerant recovery equipment.
GB - 19
38GL_M…G / 38YY(S)_M…G
Diagnostics
The electronic control made on the unit ensures continuous
monitoring of the unit operation and in case of wrong operation an
alarm is generated. This alarm is signalled by the red LED (D6),
which the electronic card is provided with. Moreover, an alarm log is
stored into the electronic card memory, and it will be identified by a
code. The memory contains a maximum of 6 alarms. Dip Switch 4
OFF[1] (S1): if no alarm is generated, the red LED blinks to indicate
normal operation (1 second ON and 1 second OFF). In the event of
an alarm, the red LED OFF blinks for 2.5 sec. and then for a
number of times equal to the number of the alarm code, for 0.5
Description
Action
Alarm
reset
mode
1
2
No alarm stored.
Faulty outdoor air
temperature sensor.
No action
Unit is stopped
Automatic
Automatic
3
Circuit “A” coil
temperature sensor is faulty.
Unit is stopped
Automatic
4
Circuit “B” coil
temperature sensor is faulty.
Unit is stopped
Automatic
5
Parameter diagnostics
Unit is stopped
Automatic
6
Wrong input signal
Unit is stopped
Automatic
Alarm
code
[1]
seconds ON and for 0.5 seconds OFF. The code sequence is
followed by 2 seconds during which the LED is OFF. When the last
alarm is coded the alarm sequence will start from the first alarm
being detected.
The diagnostics indicates the detected alarms but not their number.
Dip Switch 4 ON (S1): the log of the alarms contained in the
memory is signalled by the red LED that blinks as many times as
the alarm code number. If no alarms are detected, the code being
signalled is “1”. There follows a list describing the possible cause of
each alarm code:
Possible cause
No cause
Sensor is out-of-scale, or not
connected to the card, sensor wires
are cut or sensor is faulty.
Sensor is out-of-scale, or not
connected to the card, sensor wires
are cut or sensor is faulty.
Sensor is out-of-scale, or not
connected to the card, sensor wires
are cut or sensor is faulty.
EEprom “U11” is faulty or wrongly installed on
the card. Card end of line test aborted.
Cables Y-O-W2 reversed on the
connection terminal block or on the “J4” card.
Indoor units not configured as multisplit units.
Position selected at the factory.
Connector
J4
Electronic card
Example of alarm code 2 followed by alarm code 3:
Pause
of 2.5
sec.
Alarm Pause
code
of 2
2
sec.
Led off
Alarm
code 3
Pause
of 2
sec.
EEprom
U11
Led D6
Dip
switch
S1
Led on
WARNING: By passing Dip Witch 4 (S1) from the ON to the OFF position for three times in 5 seconds, the alarm log is cancelled.
At the end of this operation, put the Dip Switch 4 (S1) in the OFF position.
Testing
• To operate testing follow the instructions contained in the indoor
units installation manual.
• For multisplit systems testing can be carried out only if made on
one circuit at a time.
Table VI: Accessories
Description
Wall bracket kit
Wall bracket kit
PTC starting kit
Low temperature kit
Low temperature kit
Low temperature kit
(1): 1 part - (2): two parts
GB - 20
Part number
38GL_M…G
38YY-M...G
2M12G 2M18G 2M24G 2M36G 2M48G 3M21G 3M30G 4M24G 2M18G 2M24G
앬
38YL-900---002-40
앬
앬
앬
앬
38YL-900---001-40
앬(1)
앬 (2)
앬 (2)
앬 (2)
앬 (1)
앬 (2)
38YL-900---010-40
앬(1)
앬 (1)
38GLX9001
(1)
앬
38GLX9002
38GLX9004
앬(2)
앬 (2)
앬 (1)
앬(1)
L010127H20 - 1105
Via R. Sanzio, 9 - 20058 Villasanta (MI) Italy - Tel. 039/3636.1
The manufacturer reserves the right to change any product specifications without notice.
November, 2005.
Printed in Italy