Transcript
50TZ/YZ 38FZ/BZ-40TZ/BZ Single-Package Cooling Units and Heat Pumps
Carrier is participating in the Eurovent Certification Programme. Products are as listed in the Eurovent Directory of Certified Products.
Installation, operation and maintenance instructions
1
CONTENTS Page
Page START-UP CHECK LIST
3
PHYSICAL DATA
4
ELECTRICAL DATA
6 27 28 29
AIR DISCHARGE
30
SAFETY CONSIDERATIONS INSTALLATION Siting the unit Rigging Ductwork Condensate and rainwater drainage ELECTRICAL CONNECTIONS Electrical connection between units Thermostat connection REFRIGERANT LINE CONNECTIONS Refrigerant line selection Checks before start-up
2
36 36
START-UP
37
REFRIGERANT SYSTEM DESCRIPTION
37
COMPRESSOR REPLACEMENT
37
DESCRIPTION OF UNIT SAFETY DEVICES Operating limits
37 38
CONTROL SEQUENCE
38
OPTIONS/ACCESSORIES
38
GENERAL MAINTENANCE
38
SERVICE Lubrication Servicing recommendations
38 38 39
TRANSFORMATION TO SPLIT SYSTEM
39
FINAL RECOMMENDATIONS
39
TROUBLESHOOTING CHART
40
5
DIMENSIONS Service area Coordinates for the centre of gravity Weight distribution
FAN PERFORMANCES
REFRIGERANT CHARGE Gas tightness testing and dehydration
31 33 33 33 33 33 34 34 34 34 35 35 36
START-UP CHECK LIST
Start up date: .....................................................................
Equipment sold by: ......................................................................................................................................... Contract No: ..................................................... Installed by: ...................................................................................................................................................... Contract No: ..................................................... Site address: ....................................................................................................................................................................................................................................... Equipment type and serial No:
50TZ/YZ ........................................................................................................................................................................................... 38FZ/BZ ........................................................................................................................................................................................... 40TZ/BZ ........................................................................................................................................................................................
ELECTRICAL DATA: Supply voltage
Ph 1: . ........................ Volts
Ph 2: .................... Volts
Ph 3 .......................Volts
Nominal voltage: .............................................. Volts
% network voltage: .................................................................................................................
Current draw Ph 1: .................................... Amperes
Ph 2: ............................... Amperes
Control circuit voltage: ................................... Volts
Control circuit fuse: ...............................................................................................Amperes
Ph 3: .......................................... Amperes
Main circuit breaker rating: ............................................................................................................................................................................................................ PHYSICAL DATA: Outdoor unit :
Indoor unit :
Entering air temp.: ................................................................ oC Leaving air temp.: ................................................................
o
C
Entering air temp.: ..............................................................
o
C
Leaving air temp.: ..............................................................
o
C
Pressure drop (air): .............................................................. kPa
Pressure drop (air): ............................................................. kPa
Discharge air pressure: ....................................................... Pa
Discharge air pressure: ......................................................
Fan motor input:
Ph. 1: ........................................... Volts
Fan motor input:
Pa
Ph. 1: .......................................... Volts
Ph. 2: ........................................... Volts
Ph. 2: ..........................................Volts
Ph. 3: ........................................... Volts
Ph. 3: .......................................... Volts
SAFETY DEVICE SETTING 38TA UNIT: High pressure switch:
cut-out: ............................................. kPa
cut-in: ............................................................... kPa
Low pressure switch:
cut-out: ............................................. kPa
cut-in: ................................................................. kPa
Step controller:
cut-out 1st step: ............................... oC
cut-in 1st step: .................................................. oC
cut-out 2nd step: .............................. oC
cut-in 2 nd step: ...............................................
o
C
Oil level: ..................................................................................................................................................................................................................................................... Oil visible in sight glass? ......................................................................................................................................................................................................................... ACCESSORIES
Commissioning engineer (name): .......................................................................................................................................................................................................... Customer agreement Name: .......................................................................................... Date: .............................................................................................................................. Remarks: Note: Complete this start-up list at the time of installation
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Table 1 - Physical data 50TZ Nominal cooling capacity*
kW
Operating weight 50TZ 40TZ/BZ 38FZ
kg
Compressor Oil charge Oil type Refrigerant Refrigerant charge**
l
024
036
042
048
060
072
084
6.50
9.11
10.50
12.00
14.80
19.10
22.74
168 58 110
193 63 130
211 71 140
241 76 165
267 87 180
329 116 213
381 120 261
Hermetic reciprocating compressor 1.18 1.50 1.65 Mobil 22 BC POE
1.65
1.65 1.65 Maneurop 160PZ
2.84
kg
R-407C 1.88
3.32
4.56
5.17
7.72
Indoor section (40TZ/BZ) Face area Rows ... fin spacing Test pressure
m2 mm bar
Copper tubes, pretreated aluminium fins 0.20 0.30 0.35 3 ... 1.82 3 ... 2.12 3 ... 2.12 30 30 30
0.39 3 ... 2.12 30
0.41 3 ... 2.12 30
0.61 3 ... 2.12 30
0.61 4 ... 2.12 30
Outdoor section (38FZ) Face area Rows ... fin spacing Test pressure
m2 mm kPa
Copper tubes, pretreated aluminium fins 0.31 0.38 0.45 4 ... 1.82 4 ... 1.82 4 ... 1.82 30 30 30
0.53 5 ... 1.82 30
0.60 5 ...1.59 30
0.70 5 ... 2.12 30
0.76 6 ... 2.12 30
Indoor fan (40TZ/BZ) Nominal air flow Nominal air flow range Nominal static pressure (dry/wet)
l/s l/s Pa
One ... dual-inlet, centrifugal 400 565 340-460 480-650 50-40 60-50
670 570-770 60-50
670 570-770 60-50
950 760-1090 90-80
1320 1050-1520 120-110
1365 1100-1570 120-110
Outdoor fan (38FZ) Nominal air flow Nominal air flow range Nominal static pressure
l/s l/s Pa
One ... dual-inlet, centrifugal 530 800 450-600 680-900 30 30
865 730-940 30
865 730-970 40
1350 1085-1475 50
1650 1320-1800 50
1875 1500-2150 50
Indoor air filter Width x height
mm
One filter, thickness 7 mm, filter class M1 312 x 336 352 x 378 387 x 394
387 x 394
397 x 434
542 x 524
542 x 524
024
036
042
048
060
072
084
kW
6.00
8.22
9.00
11.22
13.95
17.38
20.25
Condensing unit 38FZ Nominal cooling capacity***
2.23
2.83
* Based on an outdoor air dry bulb temperature of 35°C and an indoor air wet bulb temperature of 19°C. ** The refrigerant charge given is for the complete system, but does not include the connection lines. *** Based on an outdoor air dry bulb temperature of 35°C and a dewpoint suction temperature of 7°C.
Table 2 - Physical data 50YZ Nominal cooling capacity* Nominal heating capacity**
kW kW
Operating weight 50YZ 40BZ 38BZ
kg
Compressor Oil charge Oil type Refrigerant Refrigerant charge***
l
024
036
042
048
060
072
084
6.20 6.52
8.90 9.50
10.10 11.30
11.56 12.50
14.34 16.84
19.10 21.80
22.20 25.00
170 58 112
196 63 133
214 71 143
244 76 168
270 87 183
332 116 216
385 120 265
Hermetic reciprocating compressor 1.18 1.50 1.65 Mobil 22 BC POE
1.65
1.65 1.65 Maneurop 160PZ
2.84
kg
R-407C 2.07
3.43
4.87
5.57
7.44
Indoor section (40BZ) Face area Rows ... fin spacing Test pressure
m2 mm bar
Copper tubes, pretreated aluminium fins 0.20 0.30 0.35 3 ... 1.82 3 ... 1.82 3 ...1.82 30 30 30
0.39 3 ... 1.82 30
0.41 3 ... 1.59 30
0.61 3 ... 2.12 30
0.61 4 ... 2.12 30
Outdoor section (38BZ) Face area Rows ... fin spacing Test pressure
m2 mm kPa
Copper tubes, pretreated aluminium fins 0.31 0.38 0.45 4 ... 1,82 4 ... 1.82 4 ... 1.82 30 30 30
0.53 5 ... 1.82 30
0.60 5 ...1.59 30
0.70 5 ... 2.12 30
0.76 6 ... 2.12 30
Indoor fan (40BZ) Nominal air flow Nominal air flow range Nominal static pressure (dry/wet)
l/s l/s Pa
One ... dual inlet, centrifugal 400 565 340-460 480-650 50-40 60-50
670 570-770 60-50
670 570-770 60-50
950 760-1090 90-80
1320 1050-1520 120-110
1365 1100-1570 120-110
Outdoor fan (38BZ) Nominal air flow Nominal air flow range Nominal static pressure
l/s l/s Pa
One ... dual inlet, centrifugal 530 800 450-600 680-900 30 30
865 730-940 30
865 730-970 40
1350 1085-1475 50
1650 1320-1800 50
1875 1500-2150 50
Indoor air filter Width x height
mm
One filter, thickness 7 mm, filter class M1 312 x 336 352 x 378 387 x 394
387 x 394
397 x 434
542 x 524
542 x 524
2.73
3.32
* Based on an outdoor air dry bulb temperature of 35°C and an indoor air wet bulb temperature of 19°C. ** Based on an outdoor air wet bulb temperature of 6°C and an indoor dry bulb temperature of 20°C. *** The refrigerant charge given is for the complete system, but does not include the connection lines.
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Table 3 - Electrical data 50TZ (40TZ/BZ + 38BZ)
024
036
042
048
060
072
084
Nominal voltage (± 10%)*
V
230
400
230
400
230
400
230
400
230
400
230
400
230
Nominal power input**
kW
2.90
2.90
3.99
3.99
4.68
4.68
5.07
5.07
7.37
7.37
10.08
10.08
10.75
400 10.75
Nominal current drawn**
A
13.33
6.30
12.50
8.74
15.58
11.50
16.98
12.23
25.49
18.54
30.12
17.41
33.19
19.18
Effective power input
kW
2.90
2.90
3.89
3.89
4.54
4.54
4.93
4.93
6.96
6.96
9.39
9.39
9.99
9.99
Effective current drawn
A
13.33
6.30
12.19
8.52
15.11
11.16
16.51
11.89
24.07
17.51
28.06
16.22
30.67
17.73
Starting current
A
86
46
99
60
117
72
134
81
159
105
170
90
162
105
Maximum power input***
kW
3.24
3.24
4.53
4.53
5.23
5.23
5.71
5.71
8.00
8.00
10.74
10.74
11.95
11.95
Maximum current drawn***
A
14.88
7.04
14.19
9.92
17.42
12.86
19.13
13.78
27.67
20.13
32.09
18.55
35.93
20.77
* The unit power supply is three phase (except size 024, 230 V, which is single-phase). The fan power supply is single phase, except for sizes 072 and 084 which are three phase. ** Based on an outdoor air dry bulb temperature of 35°C and an indoor temperature of 19°C wet bulb and 27°C dry bulb. *** Based on an outdoor air dry bulb temperature of 46°C and an indoor air wet bulb temperature of 21°C. Note: The effective power input is according to EUROVENT.
Condensing unit 38FZ
024
036
042
048
060
072
084
Nominal voltage (± 10%)*
V
230
400
230
400
230
400
230
400
230
400
230
400
230
400
Nominal power input**
kW
2.45
2.45
3.63
3.63
4.04
4.04
4.51
4.51
6.49
6.49
8.52
8.52
9.16
9.16
Nominal current drawn**
A
11.25
5.32
11.37
7.95
13.45
9.93
15.11
10.89
22.45
16.33
25.46
14.72
28.27
16.34
Effective power input
kW
2.45
2.45
3.63
3.63
4.04
4.04
4.51
4.51
6.26
6.26
8.24
8.24
8.85
8.85
Effective current drawn
A
11.26
5.32
11.38
7.95
13.45
9.93
15.10
10.88
21.65
15.75
24.62
14.23
27.31
15.79
Starting current
A
84.6
44.6
97.1
58.1
114.6
69.6
131.6
78.6
154.8
100.8
166.5
88.0
157.2
102.2
Maximum power input***
kW
3.02
3.02
4.14
4.14
4.66
4.66
5.38
5.38
7.60
7.60
10.06
10.06
10.75
10.75
Maximum current drawn***
A
13.9
6.6
13.0
9.1
15.5
11.5
18.0
13.0
26.3
19.1
30.1
17.4
33.19
19.18
* The unit power supply is three phase (except size 024, 230 V, which is single-phase). The fan power supply is single phase, except for sizes 072 and 084 which are three phase. ** Based on an outdoor air dry bulb temperature of 35°C and a dewpoint suction temperature of 7°C. *** Based on an outdoor air dry bulb temperature of 46°C and a dewpoint suction temperature of 12°C. Note: The effective power input is according to EUROVENT.
Table 4 - Electrical data 50YZ (40BZ + 38BZ)
024
Nominal voltage (± 10%)*
V
Nominal power input Cooling** Heating***
kW
Nominal current drawn Cooling** Heating***
A
Effective power input Cooling Heating
kW
Effective current drawn Cooling Heating
A
Starting current
A
Maximum power input*** Cooling**** Heating*****
kW
Maximum current drawn*** Cooling**** Heating*****
A
036
042
048
060
072
084
230
400
230
400
230
400
230
400
230
400
230
400
230
400
2.74 2.35
2.74 2.35
4.20 3.51
4.20 3.51
4.70 4.00
4.70 4.00
5.04 4.55
5.04 4.55
7.57 6.97
7.57 6.97
10.10 9.07
10.10 9.07
10.92 9.58
10.92 9.58
12.77 11.21
6.04 5.30
13.89 12.00
10.06 8.87
15.79 14.14
11.40 10.60
17.10 15.76
12.43 11.65
25.29 24.09
18.06 17.57
30.00 27.59
17.34 15.95
33.65 30.79
19.45 17.80
2.74 2.35
2.74 2.35
4.10 3.41
4.10 3.41
4.56 3.86
4.56 3.86
4.90 4.41
4.90 4.41
7.16 6.56
7.16 6.56
9.41 8.38
9.41 8.38
10.16 8.82
10.16 8.82
12.76 11.20
6.04 5.30
13.56 11.66
9.82 8.62
15.32 13.65
11.06 10.23
16.63 15.28
12.09 11.30
23.92 22.68
17.08 16.54
27.96 25.50
16.16 14.74
31.14 28.28
18.00 16.35
86
46
99
60
117
72
134
81
159
105
170
90
162
105
3.08 2.78
3.08 2.78
4.65 4.07
4.65 4.07
5.22 4.63
5.22 4.63
5.66 5.09
5.66 5.09
8.26 7.70
8.26 7.70
11.06 10.54
11.06 10.54
12.04 11.87
12.04 11.87
14.17 12.79
6.70 6.05
14.86 13.01
10.54 9.23
17.24 15.29
12.28 10.89
18.23 16.39
12.91 11.61
27.10 25.26
19.03 17.74
32.87 31.32
19.00 18.11
35.94 35.44
20.78 20.48
* The unit power supply is three phase (except size 024, 230 V, which is single-phase). The fan power supply is single phase, except for sizes 072 and 084 which are three phase. ** Based on an outdoor air dry bulb temperature of 35°C and an indoor temperature of 19°C wet bulb. *** Based on an outdoor air wet bulb temperature of 6°C and an indoor temperature of 20°C dry bulb. **** Based on an outdoor air dry bulb temperature of 46°C and an indoor air wet bulb temperature of 21°C. ***** Based on an outdoor air wet bulb temperature of 18°C. Note: The effective power input is according to EUROVENT.
5
Fig. 1 - Dimensions, mm 50TZ/YZ 024
View on indoor air supply/return
Plan view
View on outdoor air supply/return
Evaporator access panel
Condenser air outlet
Compressor access panel
Drain, 3/4" MPT
Control box access panel
Unit supports
Evaporator air inlet
Cable entry
Evaporator air outlet
Main disconnect switch
Condenser air inlet Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
6
Fig. 2 - Dimensions, mm 50TZ/YZ 036
View on indoor air supply/return
Plan view
View on outdoor air supply/return
Evaporator access panel
Condenser air outlet
Compressor access panel
Drain, 3/4" MPT
Control box access panel
Unit supports
Evaporator air inlet
Cable entry
Evaporator air outlet
Main disconnect switch
Condenser air inlet Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
7
Fig. 3 - Dimensions, mm 50TZ/YZ 042
View on indoor air supply/return
Plan view
View on outdoor air supply/return
Evaporator access panel
Condenser air outlet
Compressor access panel
Drain, 3/4" MPT
Control box access panel
Unit supports
Evaporator air inlet
Cable entry
Evaporator air outlet
Main disconnect switch
Condenser air inlet Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
8
Fig. 4 - Dimensions, mm 50TZ/YZ 048
View on indoor air supply/return
Plan view
View on outdoor air supply/return
Evaporator access panel
Condenser air outlet
Compressor access panel
Drain, 3/4" MPT
Control box access panel
Unit supports
Evaporator air inlet
Cable entry
Evaporator air outlet
Main disconnect switch
Condenser air inlet
Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
9
Fig. 5 - Dimensions, mm 50TZ/YZ 060
View on indoor air supply/return
Plan view
View on outdoor air supply/return
Evaporator access panel
Condenser air outlet
Compressor access panel
Drain, 3/4" MPT
Control box access panel
Unit supports
Evaporator air inlet
Cable entry
Evaporator air outlet
Main disconnect switch
Condenser air inlet Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
10
Fig. 6 - Dimensions, mm 50TZ/YZ 072
View on indoor air supply/return
Plan view
View on outdoor air supply/return
Evaporator access panel
Condenser air outlet
Compressor access panel
Drain, 3/4" MPT
Control box access panel
Unit supports
Evaporator air inlet
Cable entry
Evaporator air outlet
Main disconnect switch
Condenser air inlet Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
11
Fig. 7 - Dimensions, mm 50TZ/YZ 084
View on indoor air supply/return
Plan view
View on outdoor air supply/return
Evaporator access panel
Condenser air outlet
Compressor access panel
Drain, 3/4" MPT
Control box access panel
Unit supports
Evaporator air inlet
Cable entry
Evaporator air outlet
Main disconnect switch
Condenser air inlet
Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
12
Fig. 8 - Dimensions, mm 38FZ/BZ 024
View on refrigerant line connection side
Refrigerant line connection
Plan view
View on outdoor air supply/return
Compressor access panel
Condenser air outlet
Control box access panel
Drain, 3/4" MPT
Suction line ø 5/8"
Unit supports
Liquid line ø 3/8"
Cable entry
Condenser air inlet
Main disconnect switch
Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
13
Fig. 9 - Dimensions, mm 38FZ/BZ 036
View on refrigerant line connection side
Refrigerant line connection
Plan view
View on outdoor air supply/return
Compressor access panel
Condenser air outlet
Control box access panel
Drain, 3/4" MPT
Suction line ø 5/8"
Unit supports
Liquid line ø 3/8"
Cable entry
Condenser air inlet
Main disconnect switch
Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
14
Fig. 10 - Dimensions, mm 38FZ/BZ 042
View on refrigerant line connection side
Refrigerant line connection
Plan view
View on outdoor air supply/return
Compressor access panel
Condenser air outlet
Control box access panel
Drain, 3/4" MPT
Suction line ø 5/8"
Unit supports
Liquid line ø 3/8"
Cable entry
Condenser air inlet
Main disconnect switch
Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
15
Fig. 11 - Dimensions, mm 38FZ/BZ 048
View on refrigerant line connection side
Refrigerant line connection
Plan view
View on outdoor air supply/return
Compressor access panel
Condenser air outlet
Control box access panel
Drain, 3/4" MPT
Suction line ø 5/8"
Unit supports
Liquid line ø 3/8"
Cable entry
Condenser air inlet
Main disconnect switch
Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
16
Fig. 12 - Dimensions, mm 38FZ/BZ 060
View on refrigerant line connection side
Refrigerant line connection
Plan view
View on outdoor air supply/return
Compressor access panel
Condenser air outlet
Control box access panel
Drain, 3/4" MPT
Suction line ø 5/8"
Unit supports
Liquid line ø 3/8"
Cable entry
Condenser air inlet
Main disconnect switch
Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
17
Fig. 13 - Dimensions, mm 38FZ/BZ 072
View on refrigerant line connection side
Refrigerant line connection
Plan view
View on outdoor air supply/return
Compressor access panel
Condenser air outlet
Control box access panel
Drain, 3/4" MPT
Suction line ø 5/8"
Unit supports
Liquid line ø 3/8"
Cable entry
Condenser air inlet
Main disconnect switch Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
18
Fig. 14 - Dimensions, mm 38FZ/BZ 084
View on refrigerant line connection side
Refrigerant line connection
Plan view
View on outdoor air supply/return
Compressor access panel
Condenser air outlet
Control box access panel
Drain, 3/4" MPT
Suction line ø 5/8"
Unit supports
Liquid line ø 3/8"
Cable entry
Condenser air inlet
Main disconnect switch
Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
19
Fig. 15 - Dimensions, mm 40BZ 024
View on refrigerant line connection side
Refrigerant line connection
Plan view
View on indoor air supply/return
Compressor access panel
Condenser air outlet
Suction line ø 5/8"
Drain, 3/4" MPT
Liquid line ø 3/8"
Unit supports
Condenser air inlet
Cable entry
Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
20
Fig. 16 - Dimensions, mm 40BZ 036
View on indoor air supply/return
Refrigerant line connection
Plan view
View on refrigerant line connection side
Compressor access panel
Condenser air outlet
Suction line ø 5/8"
Drain, 3/4" MPT
Liquid line ø 3/8"
Unit supports
Condenser air inlet
Cable entry
Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
21
Fig. 17 - Dimensions, mm 40BZ 042
View on indoor air supply/return
Refrigerant line connection
Plan view
View on refrigerant line connection side
Compressor access panel
Condenser air outlet
Suction line ø 5/8"
Drain, 3/4" MPT
Liquid line ø 3/8"
Unit supports
Condenser air inlet
Cable entry
Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
22
Fig. 18 - Dimensions, mm 40BZ 048
View on indoor air supply/return
Refrigerant line connection
Plan view
View on refrigerant line connection side
Compressor access panel
Condenser air outlet
Suction line ø 5/8"
Drain, 3/4" MPT
Liquid line ø 3/8"
Unit supports
Condenser air inlet
Cable entry
Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
23
Fig. 19 - Dimensions, mm 40BZ 060
View on indoor air supply/return
Refrigerant line connection
Plan view
View on refrigerant line connection side
Compressor access panel
Condenser air outlet
Suction line ø 5/8"
Drain, 3/4" MPT
Liquid line ø 3/8"
Unit supports
Condenser air inlet
Cable entry
Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
24
Fig. 20 - Dimensions, mm 40BZ 072
View on indoor air supply/return
Refrigerant line connection
Plan view
View on refrigerant line connection side
Compressor access panel
Condenser air outlet
Suction line ø 5/8"
Drain, 3/4" MPT
Liquid line ø 3/8"
Unit supports
Condenser air inlet
Cable entry
Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
25
Fig. 21 - Dimensions, mm 40TZ/BZ 084
View on indoor air supply/return
Refrigerant line connection
Plan view
View on refrigerant line connection side
Compressor access panel
Condenser air outlet
Suction line ø 5/8"
Drain, 3/4" MPT
Liquid line ø 3/8"
Unit supports
Condenser air inlet
Cable entry
Note: Standard air supply and return
When designing an installation, always use up-to-date drawings, available from your local Carrier office.
26
Fig. 22 - Service area, mm 50TZ/YZ (all sizes)
A: 800 mm B: 500 mm C: 600 mm *D: 500 mm NOTE: * For size 50TZ/YZ 060 D = 600 mm.
Fig. 23 - Service area, mm 38FZ/BZ (all sizes)
A: 800 mm B: 500 mm C: 500 mm
Fig. 24 - Service area, mm 40TZ/BZ (all sizes)
A: 600 mm *B: 500 mm C: 500 mm NOTE: * For size 40BZ 060 B = 600 mm.
27
Fig. 25 - Centre of gravity (approx.) 50TZ/YZ (all sizes)
50TZ/YZ
024
036
042
048
060
072
084
XG* mm YG* mm ZG* mm
443 200 428
461 213 438
522 219 484
559 217 519
595 223 563
695 290 667
710 290 702
* Measured from point
Fig. 26 - Centre of gravity (approx.) 38FZ/BZ (all sizes)
38FZ/BZ
024
036
042
048
060
072
084
XG* mm YG* mm ZG* mm
302 199 340
310 211 357
322 210 424
348 212 458
372 218 500
460 283 600
490 283 610
* Measured from point
Fig. 27 - Centre of gravity (approx.)
40TZ/BZ (all sizes)
40TZ/BZ
024
036
042
048
060
072
084
XG* mm YG* mm ZG* mm
290 223 495
300 238 586
308 240 633
310 232 682
310 235 725
430 275 758
460 277 786
* Measured from point
28
Fig. 28 - Weight distribution, kg (approx.) 50TZ/YZ (all sizes)
Control box
Support points
50TZ 024
036
042
048
060
072
084
19 27 17 42 50 13
21 31 20 48 59 14
25 36 20 52 61 17
28 39 24 60 69 21
33 46 28 65 73 22
41 57 39 75 84 33
49 65 46 86 96 40
Support points
50YZ 024
036
042
048
060
072
084
20 27 18 42 50 13
22 31 21 47 60 15
26 36 20 53 62 17
28 49 25 61 70 21
33 46 28 66 74 23
42 57 39 76 85 33
49 66 47 87 96 40
Fig. 29 - Weight distribution, kg (approx.) 38FZ/BZ (all sizes) Support points
38FZ 024
036
042
048
060
072
084
18 15 43 34
22 18 50 40
27 20 52 41
32 23 65 45
36 27 69 48
43 37 77 55
54 48 91 68
Support points
38BZ 024
036
042
048
060
072
084
18 16 43 34
23 19 51 40
27 20 55 41
33 23 66 46
37 27 70 49
44 37 78 57
55 49 92 69
Control box
Fig. 30 - Weight distribution, kg (approx.) 40TZ/BZ (all sizes)
Support points
40TZ/BZ 024 036
042
048
060
072
084
11 17 18 12
14 19 21 17
15 21 22 18
18 25 25 19
25 32 25 34
25 34 25 36
12 18 20 13
Air Filter
29
Air discharge In these units the air discharge and supply (indoor and outdoor) is factory-set as shown in Fig. 31. Alternative positions are possible, as follows (Fig. 32):
Fig. 32 - Alternative air supply and discharge (except outdoor unit model 084)
Fig. 31 - Standard air supply and discharge
A = Alternative NOTE: In the 50TZ/YZ 060 and 40BZ 060 units the standard indoor air discharge is through this panel. S = Standard NOTE: In the 50TZ/YZ 060 and 40BZ 060 units the standard indoor air discharge is through this panel. Legend Figs. 31 and 32 1 2 3 4 5 6 7 8 9 0 !
Indoor air discharge panel Access panel Indoor fan/motor assembly Air filter panel Access panel Outdoor air discharge panel Access panel Air discharge duct Outdoor fan/motor assembly Outdoor air supply panel Access panel
Indoor unit change a) b)
c) d) e) f) g) h)
Detach discharge panel and access panel . Remove the fan/motor assembly , loosening it from the unit base. In sizes 50TZ/YZ 060 and 40BZ 060 remove the duct. Unscrew the angle irons in the fan/motor assembly . Turn the fan/motor assembly by 180° and attach the angle irons previously removed. Fasten the fan/motor assembly in its new position. Install the discharge panel and the access panel in their new positions. Remove filter panel and access panel . Exchange the position of panels and .
See Figs. 31 and 32.
30
Outdoor unit change a) b) c) d) e) f) g) h)
Detach discharge panel and access panel . Remove the fan/motor assembly , loosening it from the unit base and remove the duct . Unscrew the angle irons in the fan/motor assembly . Turn the fan/motor assembly by 180° and attach the angle irons previously removed. Fasten the fan/motor assembly in its new position. Install the discharge panel and the access panel in their new positions. Remove supply air panel and access panel !. Exchange the position of panels and !.
See Figs. 31 and 32.
Fan performance curves 50TZ/YZ 024ventilador outdoor fan (38BZ/FZ 024) 50TZ/YZ024 exterior (38BZ/FZ024)
275
3 2
250
40 3 30
225
20
200
10
175
420
440
80
500
60
450
40
400
20
350
0 600
300 650
625
Available static pressure, Pa
550
Presión estática disponible, Pa
100
575
300
20
280
10
260 2 475
500
1
60
625
50 40
575
30 2
2
20
0 650
700
2
525
3
60
475 425
3
20
375
0
325 800
750
Available static pressure, Pa
80
Presión estática disponible, Pa
2
Power input, W
575
1
Consumo, W
Available static pressure, Pa
Presión estática disponible, Pa
1
700
100
700
80
650 1
60
600
2 2
40
550
20
500
750
600 550
2
2 60
3
500 450
3
20
400
0
CaudalAir deflow, aire,l/sl/s
750
350 800
Available static disponible, pressure, Pa Pa Presión estática
80
700
900
120
Consumo, Power input,WW
Available staticdisponible, pressure, Pa Pa Presión estática
650
650
850
450 950
50TZ/YZ 048ventilador outdoor fan (38BZ/FZ 048) 50TZ/YZ048 exterior (38BZ/FZ048) 1
1
600
800
CaudalAir deflow, aire, l/sl/s
120
550
475 900
850
1
0 700
50TZ/YZ 048ventilador indoor fan (40BZ(40BZ048) 048) 50TZ/YZ048 interior
40
800
750
CaudalAir deflow, aire,l/sl/s
100
750
120
625
650
525
10
50TZ/YZ 042ventilador outdoor fan (38BZ/FZ 042) 50TZ/YZ042 exterior (38BZ/FZ042)
120
600
675
CaudalAir deflow, aire,l/sl/s
50TZ/YZ 042ventilador indoor fan (40BZ(40BZ042) 042) 50TZ/YZ042 interior
550
240 600
575
70
Air flow, l/s
40
550
1
80
Caudal de aire, l/s
100
525
90
Power input, W W Consumo,
Available static pressure, Pa
Presión estática disponible, Pa
600
550
30
50TZ/YZ 036ventilador outdoor fan (38BZ/FZ 036) 50TZ/YZ036 exterior (38BZ/FZ036)
120
525
320 2
CaudalAir deflow, aire,l/sl/s
50TZ/YZ 036ventilador indoor faninterior (40BZ (40BZ036) 036) 50TZ/YZ036
500
40
0 450
Caudal aire, Airde flow, l/s l/s
475
340 1
Consumo, Power input,W W
400
360
50
Power input, W
380
60
Consumo, W
360
150 460
380 1
750 1
100
700
80
650
2
60
600
40
550
Power input, W Consumo, W
0 340
Available static pressure, Pa
50
300
Presión estática disponible, Pa
1
2
60
70
325
Consumo, Power input,W W
Available static pressure, Pa
Presión estática disponible, Pa
1
70
Power input, W
350
80
Consumo, W
50TZ/YZ 024ventilador indoor faninterior (40BZ (40BZ024) 024) 50TZ/YZ024
1 20 0 700
500
2
750
800
850
900
950
450 1000
Caudal aire, Airde flow, l/s l/s
31
Fan performance curves 50TZ/YZ 060ventilador outdoor fan (38BZ/FZ 060) 50TZ/YZ060 exterior (38BZ/FZ060) 200
Available staticdisponible, pressure, Pa Pa Presión estática
1150 1100
1
160
1050 2
2
1000
3
120
950
3 100
900
80
850
60
800
40
750
20
700
0 750
800
850
900
950
1000
1050
1450 1
160
1400
140
1350 1
120 100
1300 1250
2
2
80
1150
40
1100
20
1050
0 1100
650 1100
1150
1200
50TZ/YZ 072ventilador indoor fan (40BZ(40BZ072) 072) 50TZ/YZ072 interior
1200 1150
100
1100 1050
50
1000
Available static pressure, Pa
1250
Consumo, Power input,WW
Available static pressure, Pa
1300
Presión estática disponible, Pa
Presión estática disponible, Pa
1350
150
950 0 1100
1200
1300
1400
1500
900 1600
1600 1550
140
1500
120
1450
100
1400
80
1350
60
1300
40
1250
20
1200
1400
1500
160
1250 150
1200 1150 1100
100
1050
Available static pressure, Pa
1300
1000
50
Presión estática disponible, Pa
1350 200
Consumo, W W Power input,
Available static pressure, Pa
Presión estática disponible, Pa
1600
1500
1700
0 1
140
1600 2
120
1500 3
100
1300
60
1200 0
40
1100
1 20
1000
1600
900 1600
1700
4
3
1800
1900
Caudal de aire, Air flow, l/s l/s
Air flow, l/s l/s Caudal de aire,
50TZ/YZ 084 (38BZ/FZ 084)
Curve
Speed
Curve
Pulley opening
1
High
0
Closed
15.33
2
Medium
1
1 turn
14.83
2
2 turns
14.33
3
3 turns
13.83
4
4 turns
13.33
Factory setting
1 turn
14.83
32
1400
4
80
0 1500
950
Models 025 to 060
1150 1800
1700
50TZ/YZ 084ventilador outdoor fan (38BZ/FZ 084) 50TZ/YZ084 exterior (38BZ/FZ084) 1400
1400
1000 1450
Air de flow, l/s l/s Caudal aire,
250
1300
1400
160
0 1300
50TZ/YZ 084ventilador indoor faninterior (40TZ/BZ 084) 50TZ/YZ084 (40TZ/BZ084)
1200
1350
180
Caudal de aire, Air flow, l/s l/s
0 1100
1300
50TZ/YZ 072ventilador outdoor fan (38BZ/FZ 072) 50TZ/YZ072 exterior (38BZ/FZ072) 1400
200
1250
Air flow, l/s l/s Caudal de aire,
Air flow, l/s
Caudal de aire, l/s
250
1200
60
Speed r/s
2 2000
2100
900 2200
Consumo, Power input, W W
140
1500
180
Consumo, WW Power input,
1
180
Consumo, W Power input, W
Available static pressure, Pa
Presión estática disponible, Pa
200
Consumo, Power input,W W
50TZ/YZ 060ventilador indoor fan (40BZ(40BZ060) 060) 50TZ/YZ060 interior
SAFETY CONSIDERATIONS
-
Installation and servicing of air conditioning equipment can be hazardous due to system pressure and electrical components.
-
Only trained and qualified service personnel should install, start-up or service air conditioning equipment. Untrained personnel can perform the basic maintenance functions of cleaning and replacing filters.
Rigging 1. When rigging, use spreaders to prevent damage to the panels (see Fig. 33). Avoid violent movements. 2. To prevent damage while in transit, do not remove the unit from the skid until it is at its final location. 3. Never roll or tip the unit more than 15o.
All other operations should be performed by trained service personnel. When working on air conditioning equipment, observe precautions in the literature, tags and labels attached to the unit and other safety precautions that may apply.
Consult all applicable rules and standards which govern the installation of air conditioning equipment. Vibration absorbers should be provided throughout the installation to prevent noise transmission.
IMPORTANT: Make sure that all unit panels are fixed in place before moving. Raise and set down the unit carefully. Fig. 33 - Rigging
Follow all safety codes. Wear safety glasses and work gloves. Use a quenching cloth for unbrazing operations. WARNING: Before performing service or maintenance operations on the unit, turn off the main power switch to the unit. Electrical shock could cause personal injury. All units are designed for ducted installation (indoor and/or outdoor air discharge). If ducts are not used the installer must place a protection grille in the discharge. Only use "Original Spare Parts" for repairs. Special attention must be paid to the correct installation of the spare parts. The parts must always be installed in their original position. During unit operation, some of the refrigerant circuit elements could reach a temperature in excess of 70oC so only trained or qualified personnel should access areas protected by access panels.
Rigging hook
This unit should not be installed in an explosive atmosphere. The unit can operate in normal radioelectric atmospheres in residential, commercial and light industrial installations. For other applications, please consult Carrier. INSTALLATION 1.
2.
Inspect shipment. Inspect the unit. If it is damaged, or if the shipment is incomplete, immediately file a claim with the shipping company. Check that the local power supply agrees with the specification on the unit nameplate.
Siting the unit Check the following points: The location must be able to support the unit operating weight (see Tables 1 and 2). Allow sufficient space for servicing and air flow around the unit (see Figs. 22, 23 and 24). Select a location free of dust or foreign matter which may cause coil clogging. When installing the unit on the ground, select a site which is not subject to flooding (outdoor units).
IMPORTANT: The unit should be correctly levelled to avoid drainage problems. Ductwork (indoor air discharge) The ductwork dimensions should be determined in accordance with the air flow to be carried, and the available static pressure of the unit. It is recommended to observe the following considerations: Whatever type of ductwork is used, it should not be made of materials which are flammable, or give off toxic gases in the event of a fire. The internal surfaces should be smooth, and not contaminate the air which passes through. It is recommended to use sheet metal ducts, adequately insulated to avoid condensation and thermal leakage. At the points where the ducts join the unit, it is recommended to use flexible connections to absorb vibrations, prevent noise inside the ductwork and allow access to the unit. Bends near the unit outlet should be avoided as much as possible. If unavoidable, they should be as slight as possible, and internal deflectors should be used when the duct has large dimensions. 33
NOTE: All duct sizing and design work should be carried out by qualified technicians. Condensate and rainwater drainage The units are supplied with a condensate drain pan with a drain pipe (outside diameter 23 mm). This tube leaves the factory separately wrapped so it is easy to check them. -
Take great care with the drain pipes; these must always be below the connection and be inclined to facilitate drainage (Fig. 34).
Voltage imbalance % = Largest deviation from average voltage Average voltage Example: Nominal supply: 400-3-50 AB = 404 V BC = 399 V AC = 394 V Average voltage =
ATTENTION: Do not make any holes in the unit base, as this may perforate the condensate pan.
Motor
404 + 399 + 394 3
= 399 400 V
Determine maximum deviation from average voltage: Fig. 34 - Drain AB = 404 - 400 = 4 BC = 400 - 399 = 1 AC = 400 - 394 = 6 Drain pipe OD 23 mm
Largest deviation is 6 volts. Percentage voltage imbalance is therefore:
Drain pan
Unit base
Field-supplied
Electrical connections WARNING: To prevent electrical shock or equipment damage, make sure disconnects are open before electrical connections are made. If this action is not taken, personal injury may occur. Field wiring must comply with all applicable codes. Voltage to the unit must be within 10% of the voltage and 10% of the current indicated on the nameplate. Contact your local power company for correction of an incorrect line voltage. Check the voltage before selecting supply wiring fuses and controls. Take special care when making the earth connection. WARNING: Operation of the unit on improper line voltage constitutes abuse and is not covered by the Carrier warranty. IMPORTANT: To ensure the correct unit power supply (cable entry, conductor cross section, protection devices etc.), consult the electrical data table, the wiring diagram supplied with the unit and the applicable standards concerning the installation of air conditioning equipment. The protective earth conductor must be slightly longer than the phases. Never operate a unit if the voltage imbalance exceeds 10%. The following formula must be used to determine the percentage of voltage imbalance. 34
6 400
x 100 = 1.5 %
CAUTION: The installer must provide line protection devices, as required by the applicable legislation. Run the power supply cables to the main disconnect switch of the 50TZ/YZ or 38FZ/BZ unit, and install airtight cable conduits through the knockouts provided for this purpose. Electrical connection between the units (38FZ/BZ and 40TZ/BZ) Make the electrical connection between the 38FZ/BZ outdoor unit and the 40TZ/BZ indoor unit, using correctly sized copper cables for the power supply of the 40TZ/BZ. Refer to the wiring diagram. Thermostat connection Thermostat/unit connection must be via a loom (wire section 1 mm2) manufactured in accordance with the wiring diagram accompanying the unit. Follow the instructions supplied with the control for thermostat assembly and handling. The general rules below should be taken into account: Power supply: 24 V AC Standard connections: R Connection to 24 V L Protection device indication C Common Y1 First stage cooling W1 First stage heating W2 Second stage heating (option) E Emergency heat (option) O Reversing valve* * The O connection is activated in cooling.
NOTE 1: If the thermostat wiring is incorrect, the control will be blocked (red LED on) and all the outlets will be deactivated when unit power is supplied. NOTE 2: The thermostat cable should be independent and separate from any 230 V or 400 V cable.
Suction line: A siphon at the base of the vertical pipe run and intermediate siphons every 8 m or oil separators are needed. Most unfavourable condition: the suction speed in the vertical pipe run must be more than 6 m/s.
Refrigerant line connections (38FZ/BZ and 40TZ/BZ) To guarantee correct unit performance ensure that the line length and number of bends are kept to a minimum. Avoid pipe kinking by using large radius bends.
Fig. 36 - Refrigerant lines option B
Indoor unit Heat pump (discharge) Heat pump
IMPORTANT: Always use refrigerant-grade deoxidized and dehydrated copper tubing between the indoor and outdoor units.
Gas
Liquid line
Cooling (suction line)
Cooling
Before connecting the refrigerant lines carefully follow the steps below: Remove the nitrogen holding charge from the refrigerant circuits. Select the diameter of the copper tubing according the the units installed and according to the distance between the indoor and outdoor units. Use silver alloy rod for soldering purposes, and ensure that this work is done in a nitrogen atmosphere. To avoid oxidation insulate the refrigerant lines adequately. Pull a vacuum in the refrigerant circuit until a pressure of 0.7 mm water column is maintained for at least 2 hours. Charge the refrigerant circuit with the necessary amount of R-407C refrigerant (in accordance with tables 1 and 2 and the length of the refrigerant lines). Check there are no refrigerant leaks. Refrigerant line selection General When designing refrigerant lines the following must be kept in mind: -
Depending on the unit arrangement: Fig. 35 - Refrigerant lines option A
Outdoor unit
Suction line: The intermediate siphon can be omitted. Most unfavourable condition: the suction speed in the vertical pipe run must be more than 6 m/s. For both option A (Figure 34) and option B (Figure 35) the following conditions should be observed: The maximum speed permitted in any line is 15 m/s. Suction line must be insulated and have a 2% slope towards the compressor and the horizontal pipe run. In long pipe runs it may be necessary to adjust the oil charge. If the liquid line flow is downward, it is necessary to install pressure equalizer for heights above 10 m. The liquid should be subcooled by at least 1 K at the restrictor inlet. In this case, if the liquid line flow is upward and the pipe is longer than 15 m, it must be subcooled by 1 K for each 3.5 m in excess of 15 m. For each metre of refrigerant pipe installed, refrigerant has to be added in accordance with table 5. Table 5 - Refrigerant charge (g/m)
Outdoor unit
Heat pump (discharge)
Diameter
3/8"
1/2"
5/8"
3/4"
7/8"
1-1/8"
1-3/8"
Liquid line Suction line
40 6
75 14
120 23
180 34
250 47
420 81
645 123
Heat pump
Liquid line
Cooling (suction line)
Cooling
Indoor unit
35
Sizing
Liquid line: The liquid line diameter can be selected using table 6. Fig. 37 - Suction line Table 6 - Liquid line SP EE
Size
s) m/ D(
024 036 042 048 060 072 084
Total equivalent length Up to 10 m From 10-30 m
From 30-50 m
3/8" 3/8" 3/8" 3/8" 3/8" 5/8" 5/8"
3/8" 1/2" 1/2" 1/2" 5/8" 5/8" 3/4"
3/8" 3/8" 3/8" 1/2" 5/8" 5/8" 5/8"
Necessary checks/precautions before start-up Pressure drop/10 m eqivalent length
-
Fig. 38 - Discharge line -
Ensure that all electrical connections are properly tightened. Ensure that the unit is level and well-supported. Check the condition of the ductwork in case damage has occurred during installation. The air filter should be clean and in place. All the panels should be fitted and firmly secured with the corresponding screws. Make sure that there is sufficient space for servicing and maintenance purposes. Check the drain connections. Ensure that there are no refrigerant leaks. Confirm that the electrical power source agrees with the unit nameplate rating. Make sure that compressors float freely on the mounting springs.
WARNING: The compressors are mounted on vibration isolators. Do not loosen or remove the support mounting bolts. Refrigerant charge
Pressure drop/10 m eqivalent length
Legend: 1 Size 024 2 Size 036 2 Size 042 3 Size 048 4 Size 060 5 Size 072 6 Size 084
From Figure 38, for the selected unit we can obtain the pressure drop corresponding to 10 m of equivalent length for each diameter. For other equivalent lengths, the pressure drop is obtained in direct proportion. The total pressure drop for the line (sum corresponding to the vertical and horizontal pipe runs) must not be higher than 20 kPa.
36
Gas tightness testing and dehydration 50TZ/YZ units are shipped fully charged with refrigerant R-407C ready for operation. If, when the unit is run, symptoms of loss of charge (for example, low pressure switch tripping or abnormally low cooling capacities) are detected, first conduct a leak test followed, if necessary, by a gas tightness test using compressed nitrogen. For the latter all refrigerant must be removed from the circuit. Transfer the refrigerant to a storage tank and then rinse the circuit. For your information, we are listing here some precautions that need to be taken into consideration, when working with these units. Refrigerant guidelines for R-407C Refrigerant R-407C consists of a non-azeotropic blend of 23% of R-32, 25% of R-125 and 52% of R-134a, and is characterised by the fact that at the time of the change in state the temperature of the liquid/vapour mixture is not constant. All checks must be pressure tests, and the appropriate pressure/ temperature ratio table must be used for the interpretation of the values. Leak detection is especially important for units charged with refigerant R-407C. Depending on whether the leak occurs in the liquid or the vapour phase, the proportion of the different components in the mixture remaining in the unit is not the same.
The following basic guidelines must be observed: • Leaks must be repaired immediately by qualified personnel. • Refrigerant must never be discharged to the atmosphere. • Use a refrigerant reclaim unit. • Any loss of oil from the system during maintenance must be stopped immediately and the collected oil must by removed in accordance with applicable regulations 38FZ/BZ and 40TZ/BZ units are supplied with a nitrogen holding charge. This must be removed before soldering the connecting refrigerant lines to the unit. Once the soldering has been completed, the complete refrigerant circuit must be evacuated then the correct quantity of R-407C refrigerant for each system must be charged. WARNING: If any brazing is to be done the refrigerant circuit must be filled with nitrogen. Combustion of refrigerant produces toxic phosgene gas. VERY IMPORTANT: Never use the compressor as a vacuum pump. If more refrigerant is needed add gas very slowly via the suction line. Liquid refrigerant must never be introduced into the suction line. Do not overcharge with refrigerant. START-UP Actual start-up should only be done under the supervision of a qualified refrigeration mechanic. These units incorporate the electronic Master Link II control. The operation and handling of this control is explained in the specific instructions accompanying each unit. Initial checks With the unit in operation, ensure that the values shown on the high and low pressure gauges are within the normal limits. It is advisable to simulate unit shutdown due to high and low pressure, in order to make sure that the pressurestats work properly. To do so, proceed as follows: High pressure shutdown: Completely cover the outdoor air inlet, or disconnect the outdoor fan and motor. The unit should stop at a pressure of 2844 kPa. Low pressure shutdown: Cover the indoor air inlet, or disconnect the indoor fan and motor. Observe the low pressure gauge. The unit should stop at a pressure of 265 kPa. In both cases it is possible to reset the unit through the remote control as previously indicated. Check that the motor and compressor consumptions are approximately the same as those shown on the unit nameplate. Consumption data is also given in Tables 3 and 4.
Refrigerant system description The refrigerant circuit incorporates the following primary elements: Refrigerant-air heat exchanger: made of high quality copper tubes and pretreated aluminium fins, for extra corrosion resistance and greater protection than offered by copper fins. Refrigerant lines: made completely of high quality copper. Metering device. Compressors: hermetic compressors for all units, cooled by suction gas. They incorporate internal protection. Filter drier and Schrader valves. Safety elements: high, low pressurestat. The packaged units are supplied with the exact refrigerant charge. The split-system units are supplied with a nitrogen holding charge which must be evacuated and replaced with the right refrigerant charge for the unit size and the connection lines. Compressor replacement When an internal fault occurs, the compressor must be replaced. This must be done as detailed below: Disconnect the unit from the electrical supply. Remove the panels. Remove the gas from the refrigerant circuit using recovery equipment to avoid harming the atmosphere. Electrically disconnect the compressor. Unbraze or unscrew the suction and discharge lines, taking care not to damage the rest of the components. Remove the fastenings from the compressor. Replace the compressor, ensuring that it contains sufficient oil. Braze or screw in the lines. Connect the compressor according to the wiring diagram. Evacuate the compressor. Fill the refrigerant charge indicated on the nameplate, plus the required charge for the refrigerant connection lines. NOTE: This operation must be done by a qualified technician. Description of unit protection devices The unit includes the following compressor protection devices: Internal compressor protection device to avoid superheat. Short-cycle protection (included on the main electronic board). Outdoor fan motor thermomagnetic switch. High pressurestat: This protects the unit against excessive condensing pressure. The high pressurestat has factory-fixed non-adjustable settings. To check, see section Initial checks. Low pressurestat: This protects the unit against excessive low pressure in the evaporator. The low pressurestat has factory fixed non-adjustable settings. To check, see section Initial checks. CAUTION: When any of these cuts out, the unit stops and will not re-start until the contacts have been reclosed after rectification of the fault.
37
GENERAL MAINTENANCE Table 7 - Pressure switch settings
High pressurestat Low pressurestat
Cut-out
Cut-in
Reset
*2844 kPa *265 kPa
*1863 kPa *363 kPa
Automatic Automatic
* Factory-calibrated
WARNING: Alteration of factory settings other than the design set-point, without manufacturer's authorisation, may void the warranty. Operating limits
ATTENTION: Before starting any servicing or maintenance operation on the unit, make sure that the power supply has been disconnected. A current discharge could cause personal injury. In order to obtain maximum performance from the unit special attention should be paid to the following points: Electrical connections: The supply voltage should be within the limits permitted by the compressor. Ensure that no faulty contacts exist in the terminal blocks, contactor boards, etc. Make sure that all the electrical connections are properly tightened, and that all the electrical components (contactors, relays, etc) are firmly secured to the corresponding rails.
These units have been designed to operate within the following limits: Table 8 - Cooling operation Zone
Air temperature Dry bulb
Wet bulb
Indoor Maximum Minimum
+35°C +19°C
+21°C +14°C
-
Outdoor Maximum Minimum
+46°C +19°C*
-
-
* With the optional head pressure control, the unit can operate with temperatures below 19°C.
Table 9 - Heating operation Zone
Air temperature Dry bulb
Wet bulb
Indoor Maximum
+27°C
-
Outdoor Maximum Minimum
+24°C -15°C*
+18°C -
-
-
Pay special attention to the condition of the connecting cables between the control elements and the electrical box, and to that of the unit power supply cable. They should not be twisted and there should be no slits or notches in the insulation. Check the starting and running consumptions are within the limits specified in the corresponding technical information. Drainage: Frequently check that the drain is not obstructed, and that the condensate pan is clean and level. Inlet filter: This should be cleaned periodically. The frequency depends on the purity of the entering air. The filter may be cleaned with a household vacuum cleaner, or by immersing it in water. Refrigerant circuit: Ensure that there is no leakage of refrigerant or oil from the compressor. Check that the high and low side operating pressures are normal. Make sure that the coils are not dirty. If necessary a filter may be installed in the outdoor air inlet. Check for unusual compressor noise. Controls: Check the operation of all electric controls, high and low pressurestats, etc.
Control sequence
SERVICE
The unit is started and stopped by the remote control N1. If the remote control N1 requires cooling or heating, the built-in compressor short-cycle protection starts counting 3 seconds.
Lubrication
After this time (if high-low pressurestats, indoor and outdoor fan thermal protectors are not tripped) the unit starts up. OPTIONS/ACCESSORIES -
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Head pressure control (option/accessory) Electric resistance heater (option/accessory) Hot water coil (option/accessory) Outdoor air filter (option/accessory) Crankcase heater (option/accessory) - only for 50TZ and 38FZ units.
Both the motors and the fans have factory lubricated and sealed bearings, and need no further lubrication. The compressor has its own oil supply and oil should not be added unless a leak has occurred.
Servicing recommendations
FINAL RECOMMENDATIONS
-
The unit you have purchased has undergone strict quality control procedures before leaving the factory.
-
-
-
Before replacing any of the elements in the cooling circuit, ensure that the entire refrigerant charge is removed from both the high and low pressure sides of the unit. The control elements of the cooling system are highly sensitive. If they need to be replaced, care should be taken not to overheat them with blowlamps whilst soldering. A damp cloth should be wrapped around the component to be soldered, and the flame directed away from the component body. Silver alloy soldering rods should always be used. If the total unit gas charge has to be replaced, the quantity should be as given on the nameplate and the unit should be properly evacuated beforehand. During unit operation all panels should be in place, including the electrical box access panel. If it is necessary to cut the lines of the refrigerant circuit, tube cutters should always be used and never tools which produce burrs. All refrigerant circuit tubing should be of copper, specially made for refrigeration purposes.
All components, including the control systems and electrical equipment, etc., are certified by our Quality Control Department, and tested under the harshest possible operating conditions in our laboratories. However, after leaving the factory, it is possible that one or more of these elements may be damaged due to causes beyond our control. In such an event, the user should not work on any of the internal components, or subject the unit to operating conditions which are not specified in this manual, since serious damage may result and the guarantee would be invalidated. Repair and maintenance work should always be left to the installer. All recommendations concerning unit installation are intended to be as a guideline. The installer should carry out the installation according to the design conditions and should comply with all applicable regulations for air conditioning and refrigeration installations.
Transformation to split system (50TZ/YZ) All units can be changed from a packaged to a split system, as described below: Remove the compressor access panel(s) and the indoor unit access panel(s). Recover the complete refrigerant charge from the high and low pressure sides of each refrigerant circuit, and then create a light vacuum to prevent possible accidents. From the indoor unit at the conduit drill hole remove the neoprene insulation from the suction line(s) until you find the welded joint of both line sections (approximately 70 mm from the base of the indoor unit). Similarly locate the welded joint of the liquid line sections. Separate both lines (suction and liquid lines) by unsoldering them. After completing this operation, plug the ends of both lines to avoid the possible entry of foreign matter. Loosen the indoor fan motor supply cable sleeve. Remove the sleeve. Remove the support that links the two units; there are four screws for the lower part. Loosen the screws and nuts that join the two sections (indoor and outdoor) inside the unit and separate them carefully, to avoid damaging the refrigerant line ends. Connect the refrigerant lines as described earlier in the text.
NOTE: The manufacturer does not accept responsibility for any malfunctions resulting from misuse of the equipment.
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TROUBLESHOOTING CHART A list of possible faults, as well as the probable cause and suggested solutions is shown in Table 10. In the event of a unit malfunction it is recommended to disconnect the power supply and ascertain the cause.
Table 10 - Troubleshooting chart Symptoms Unit does not start
Unit starts and stops frequently
Unit continuously cuts out at low pressure
Unit continuously cuts out at high pressure
Abnormal system noise
Compressor loses oil Water loss
Cause No power supply Main switch open Low line voltage A protection has tripped Contactor stuck open Seized compressor Defective compressor contactor Defective compressor Refrigerant losses COOLING CYCLE: Defective low pressurestat Refrigerant losses Indoor fan does not operate COOLING CYCLE: Defective high pressurestat Blocked filter drier Outdoor fan does not operate HEATING CYCLE: Defective high pressurestat Indoor fan does not operate Piping vibration Noisy compressor Badly fitting panels Leak in system Defective drainage connections
Order No. 15031-20, 11.2001. Supersedes order No.: New Manufacturer reserves the right to change any product specifications without notice.
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Remedy Connect power supply Close switch Check voltage and remedy the deficiency Reset Replace contactor Replace compressor Replace contactor Replace compressor Check and add the necessary quantity Replace pressurestat Check and add the necessary quantity Check fan motor Replace pressurestat Replace filter Check fan motor
Replace pressurestat Check fan motor Support piping Check and change if necessary Install correctly Repair leak Check and tighten if necessary
Manufacturer: Carrier, Guadalajara, Spain Printed on Totally Chlorine-Free Paper. Printed in the Netherlands AM-036920
