Carrier 38YG Technical information

50VZ/PZ
38VZ/PZ+40PZ
Vertical Air-Cooled
Split-System Cooling Units
and Heat Pumps
Installation, operation and maintenance instructions
1
CONTENTS
START-UP CHECKLIST ................................................................................................................................................................. 3
PHYSICAL DATA ............................................................................................................................................................................. 4
ELECTRICAL DATA ....................................................................................................................................................................... 5
DIMENSIONS ................................................................................................................................................................................... 6
Service area, mm ............................................................................................................................................................................... 13
Centre of gravity, mm ........................................................................................................................................................................ 14
Weight distribution, kg ...................................................................................................................................................................... 15
Repositioning unit air discharge ........................................................................................................................................................ 16
FAN PERFORMANCE ................................................................................................................................................................... 18
SAFETY CONSIDERATIONS ...................................................................................................................................................... 26
INSTALLATION ............................................................................................................................................................................. 26
Siting the unit .................................................................................................................................................................................... 26
Ductwork (indoor air discharge) ........................................................................................................................................................ 27
Condensate drainage .......................................................................................................................................................................... 27
ELECTRICAL CONNECTIONS ................................................................................................................................................. 28
Refrigerant line connections (38VZ/PZ and 40PZ) ........................................................................................................................... 29
Refrigerant line selection ................................................................................................................................................................... 29
Sizing ................................................................................................................................................................................................. 30
REFRIGERANT CHARGE ........................................................................................................................................................... 31
START-UP ........................................................................................................................................................................................ 31
REFRIGERANT SYSTEM DESCRIPTION ............................................................................................................................... 31
COMPRESSOR REPLACEMENT .............................................................................................................................................. 31
DESCRIPTION OF UNIT PROTECTION DEVICES .............................................................................................................. 32
Operating limits ................................................................................................................................................................................. 32
OPTIONS AND ACCESSORIES .................................................................................................................................................. 32
Hot water heating coil ....................................................................................................................................................................... 32
Electric resistance heaters .................................................................................................................................................................. 33
GENERAL MAINTENANCE ....................................................................................................................................................... 34
SERVICE ......................................................................................................................................................................................... 34
TRANSFORMATION TO SPLIT SYSTEM (50VZ/PZ units) ................................................................................................... 35
FINAL RECOMMENDATIONS ................................................................................................................................................... 35
TROUBLESHOOTING CHART .................................................................................................................................................. 36
2
START-UP CHECK LIST
Start up date: ...................................................................
Equipment sold by: ..................................................................................................................................... Contract No: .................................................
Installed by: .................................................................................................................................................. Contract No: .................................................
Site address: .............................................................................................................................................................................................................................
Equipment type and serial No:
50VZ/PZ...........................................................................................................................................................................
38VZ/PZ............................................................................................................................................................................
40PZ..................................................................................................................................................................................
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: ........................................................................................
Ph 3: .......................................... Amperes
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:
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
3
Table 1 - Physical data
50VZ (40PZ/38VZ)
Nom. cooling capacity*
kW
Unit weight
50VZ
40PZ
38VZ
kg
Compressor
Oil charge
Oil type
Refrigerant
Refrigerant charge**
l
025
030
031
040
045
055
065
075
22.74
29.75
27.80
35.05
45.21
53.90
63.89
74.35
230
78
152
390
140
250
402
150
252
410
150
260
618
230
388
842
297
545
894
317
577
943
335
608
1033
365
668
3.9
1.8 x 2
Scroll
4x2
4x2
Mobil EAL Arctic 22CC
4x2
4x2
6.6 x 2
Maneurop 160SZ
7.43
Hermetic reciprocating
1.8
3.9
Maneurop 160PZ
R-407C
3.80
3.80 x 2
4.70 x 2
6.70 x 2
8.80 x 2
9.40 x 2
11.0 x 2
Copper tubes, aluminium fins
0.34
0.64
0.69
3...551
4...472
4...472
30
30
30
0.69
4...472
30
0.84
4...472
30
1.10
4...551
30
1.10
6...472
30
1.34
6...551
30
1.34
6...551
30
Copper tubes, aluminium fins
0.49
0.87
0.87
5...551
4...551
5...551
30
30
30
0.87
5...551
30
1.19
5...551
30
1.73
5...551
30
1.73
6...551
30
2.12
6…551
30
2.12
6...551
30
Evaporator fan (40PZ)
Quantity
Nominal air flow
l/s
Air flow range
l/s
Nominal static pressure (dry/wet) Pa
Double inlet centrifugal type
1
2
2
960
1490
1690
768-1152
1192-1788 1352-2028
90/70
90/70
120/100
2
1690
1352-2028
120/100
2
2190
1752-2628
140/120
2
2640
2112-3168
170/150
2
2910
2328-3492
180/160
2
3140
2512-3768
200/180
2
3530
2824-4236
210/180
Condenser fan (38VZ)
Quantity
Nominal air flow
Air flow range
Nominal static pressure
l/s
l/s
Pa
Double inlet centrifugal type
1
2
2
1470
3020
2780
1176-1764 2416-3624 2224-3336
50
50
60
2
2780
2224-3336
60
2
3610
2888-4332
60
2
4580
3664-5496
75
2
5080
4064-6096
100
2
6030
4824-7236
100
2
6890
5512-8268
100
mm
mm
Filter class M1
1
2
800x443
596x540
15
15
2
596x590
15
2
716x590
15
3
676x587
15
3
616x587
15
3
749x587
15
3
749x587
15
015
025
030
031
040
045
055
065
075
kW
13.47
19.97
27.02
24.80
32.54
40.30
48.21
59.13
71.10
Evaporator section (40PZ)
Face area
Rows...fins/m
Test pressure
Condenser section (38VZ)
Face area
Rows...fins/m
Test pressure
Air filter
Quantity
Width x height
Thickness
kg
015
14.60
m2
bar
m2
bar
Condensing unit 38VZ***
Nom. cooling capacity
6.62
2
596x590
15
*
Based on an outdoor air temperature of 35°C db and an indoor air temperature of 19°C wb
** The refrigerant charge given is for the complete system, but excludes the connection lines.
*** Based on an outdoor air dry bulb temperature of 35°C and a dewpoint suction temperature of 7°C.
50PZ (40PZ/38PZ)
015
025
030
031
040
045
055
065
075
Nom. cooling capacity*
kW
13.42
21.81
28.50
27.70
34.36
43.60
52.51
61.94
72.58
Nom. heating capacity**
kW
15.76
25.02
30.58
30.20
39.15
50.18
57.43
66.60
83.06
Unit weight
50PZ
40PZ
38PZ
kg
238
78
160
400
140
260
412
150
262
427
150
277
638
230
408
864
297
567
919
317
602
968
335
633
1058
365
693
3.9
1.8 x 2
Scroll
4x2
4x2
Mobil EAL Arctic 22CC
4x2
4x2
6.6 x 2
Maneurop 160SZ
7.71
Compressor
Oil charge
Oil type
Refrigerant
Refrigerant charge***
l
R-407C
4.02
3.94 x 2
5.40 x 2
7.50 x 2
9.20 x 2
9.50 x 2
11.20 x 2
Copper tubes, aluminium fins
0.34
0.64
0.69
3...551
4...472
4...472
30
30
30
0.69
4...472
30
0.84
4...472
30
1.10
4...551
30
1.10
6...472
30
1.34
6...551
30
1.34
6...551
30
Copper tubes, aluminium fins
0.49
0.87
0.87
5...551
4...551
5...551
30
30
30
0.87
5...551
30
1.19
5...551
30
1.73
5...551
30
1.73
6...551
30
2.12
6…551
30
2.12
6...551
30
Indoor fan (40PZ)
Quantity
Nominal air flow
l/s
Air flow range
l/s
Nominal static pressure (dry/wet) Pa
Double inlet centrifugal type
1
2
2
960
1490
1690
768-1152
1192-1788 1352-2028
90/70
90/70
120/100
2
1690
1352-2028
120/100
2
2190
1752-2628
140/120
2
2640
2112-3168
170/150
2
2910
2328-3492
180/160
2
3140
2512-3768
200/180
2
3530
2824-4236
210/180
Outdoor fan (38PZ)
Quantity
Nominal air flow
Air flow range
Nominal static pressure
l/s
l/s
Pa
Double inlet centrifugal type
1
2
2
1470
3020
2780
1176-1764 2416-3624 2224-3336
50
50
60
2
2780
2224-3336
60
2
3610
2888-4332
60
2
4580
3664-5496
75
2
5080
4064-6096
100
2
6030
4824-7236
100
2
6890
5512-8268
100
mm
mm
Filter class M1
1
2
800x443
596x540
15
15
2
596x590
15
2
716x590
15
3
676x587
15
3
616x587
15
3
749x587
15
3
749x587
15
Indoor section (40PZ)
Face area
Rows...fins/m
Test pressure
Outdoor section (38PZ)
Face area
Rows...fins/m
Test pressure
Air filter
Quantity
Width x height
Thickness
kg
Hermetic reciprocating
1.8
3.9
Maneurop 160PZ
m2
bar
m2
bar
7.20
2
596x590
15
*
Based on an outdoor air temperature of 35°C db and an indoor air temperature of 19°C wb
** Based on an outdoor air temperature of 6°C wb and an indoor air temperature of 20°C db.
*** The refrigerant charge given is for the complete system, but excludes the connection lines.
4
Table 2 - Electrical data
50VZ (40PZ/38VZ)
015
025
030
031
040
045
055
065
075
Nominal voltage ±10%*
V
230
400
230
400
230
400
230
400
230
400
230
400
230
400
230
400
230
400
Nominal power input**
kW
7.3
7.3
11.1
11.1
14.0
14.0
14.6
14.6
18.1
18.1
21.4
21.4
25.4
25.4
30.0
30.0
37.6
37.6
Nominal current drawn**
A
23.8
13.8
33.1
19.1
39.4
22.8
44.9
26.0
52.6
30.4
64.9
37.5
74.3
43.0
87.8
50.8
122.1 67.1
Effective power input
kW
6.8
6.8
10.2
10.2
13.0
13.0
13.6
13.6
16.8
16.8
19.0
19.0
22.2
22.2
26.1
26.1
33.1
Effective current drawn
A
21.6
12.5
30.5
17.6
37.0
21.4
41.9
24.2
56.5
32.6
57.9
33.4
70.0
40.5
76.6
44.3
102.0 59.0
Starting current
A
139.5 80.0
174.1 106.3 219.0 133.3 165.9 95.3
235.2 134.0 278.4 156.7 329.1 187.8 384.5 219.0 450.1 256.0
Maximum power input***
kW
7.9
7.9
12.2
12.2
15.5
15.5
16.1
16.1
21.8
21.8
25.2
25.2
29.6
29.6
35.0
35.0
44.2
24.2
14.0
35.5
20.5
43.2
25.0
49.5
28.6
66.6
38.5
73.1
42.2
88.8
51.3
99.7
57.6
129.5 74.8
Maximum current drawn*** A
Condensing unit 38VZ
015
025
030
031
040
045
055
065
33.1
44.2
075
Nominal voltage ±10%*
V
230
400
230
400
230
400
230
400
230
400
230
400
230
400
230
400
230
400
Nominal power input+
kW
6.5
6.5
10.1
10.1
12.8
12.8
13.2
13.2
16.7
16.7
19.4
19.4
23.0
23.0
26.9
26.9
34.7
34.7
Nominal current drawn+
A
20.6
11.9
29.9
17.3
36.6
21.2
37.8
21.9
56.2
32.5
59.4
34.3
72.7
42.0
79.1
45.7
106.6 61.6
Effective power input
kW
6.3
6.3
9.6
9.6
12.3
12.3
12.7
12.7
16.0
16.0
18.3
18.3
21.4
21.4
25.0
25.0
32.5
32.5
Effective current drawn
A
20.1
11.6
28.5
16.5
35.4
20.4
36.4
21.1
54.0
31.2
56.0
32.4
67.6
39.1
73.5
42.5
99.9
57.7
Starting current
A
136.7 78.4
170.1 104.0 214.1 130.5 161.1 92.5
226.9 129.2 270.9 151.2 319.2 180.9 372.2 211.9 434.2 246.8
Maximum power input++
kW
7.7
7.7
11.5
11.5
14.9
14.9
15.3
15.3
20.6
20.6
24.0
24.0
29.1
29.1
33.8
33.8
43.9
23.5
13.6
33.5
19.4
41.4
23.9
42.5
24.5
62.9
36.4
69.4
40.1
87.4
50.5
96.2
55.6
128.5 74.3
Maximum current drawn++ A
43.9
*
All units are built for 3-phase, 50 Hz supply.
** 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 dry bulb temperature of 46°C and an indoor air wet bulb temperature of 21°C.
+
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.
50PZ (40PZ/38PZ)
015
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
025
030
031
040
045
055
065
075
230
400
230
400
230
400
230
400
230
400
230
400
230
400
230
400
230
400
7.2
6.6
7.2
6.6
11.2
11.1
11.2
11.1
13.6
12.4
13.6
12.4
14.6
12.7
14.6
12.7
18.1
17.5
18.1
17.5
21.6
20.8
21.6
20.8
25.4
23.7
25.4
23.7
30.2
27.1
30.2
27.1
38.5
34.3
38.5
34.3
23.7
22.5
13.7
13.0
33.2
33.2
19.2
19.2
38.4
35.8
22.2
20.7
46.0
41.5
26.6
24.0
55.0
52.2
31.8
30.2
66.1
63.7
38.2
36.8
73.3
70.7
42.4
40.9
88.0
82.0
50.9
47.4
118.5 68.6
109.8 63.5
6.7
6.1
6.7
6.1
10.3
10.3
10.3
10.3
12.5
11.4
12.5
11.4
13.6
11.6
13.6
11.6
16.8
16.2
16.8
16.2
19.1
18.4
19.1
18.4
22.2
20.5
22.2
20.5
26.3
23.2
26.3
23.2
34.1
29.8
22.1
20.8
12.7
12.0
30.5
30.8
17.7
17.8
35.3
32.9
20.4
19.0
42.8
37.9
24.8
21.9
51.0
48.3
29.5
28.0
59.4
56.4
33.8
32.6
64.1
61.2
37.1
35.4
76.6
70.2
44.3
40.6
105.0 60.8
95.4 55.2
34.1
29.8
139.5 80.0
174.1 106.3 219.0 133.3 165.9 95.3
235.2 134.0 278.4 156.7 329.1 187.8 384.5 219.0 450.1 256.0
8.0
7.5
8.0
7.5
12.4
13.1
12.4
13.1
15.2
15.8
15.2
15.8
16.3
14.4
16.3
14.4
21.6
20.3
21.6
20.3
25.3
23.7
25.3
23.7
30.4
28.1
30.4
28.1
34.9
32.8
26.3
25.6
15.2
14.8
36.8
39.2
21.3
22.7
42.9
45.6
24.8
26.4
51.4
47.1
29.7
27.2
65.6
60.6
37.9
35.0
77.4
72.6
44.7
41.9
87.7
83.8
50.7
48.5
101.7 58.8
99.2 57.4
34.9
32.8
44.5
41.6
44.5
41.6
137.0 79.3
133.2 77.0
*
All units are built for 3-phase, 50 Hz supply.
** 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 air dry bulb temperature of 21°C.
+
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 dry bulb temperature of 18°C.
Effective power input in accordance with EUROVENT.
5
Fig. 1 - Dimensions, mm
50VZ/PZ 015
Optional
discharge
Transport skid
Power connection
38VZ/PZ 015
Optional discharge
Cable inlet
Transport skid
Drain 3/4" gas
40PZ 015
Optional discharge
Cable inlet
Drain
Transport skid
When designing an installation, always use up-to-date drawings, available from your local Carrier office
6
Fig. 2 - Dimensions, mm
50VZ/PZ 025
Optional
discharge
Transport skid
Power connection
38VZ/PZ 025
Optional discharge
Cable inlet
Transport skid
Drain 3/4" gas
40PZ 025
Optional discharge
Cable inlet
Transport skid
Drain
When designing an installation, always use up-to-date drawings, available from your local Carrier office
7
Fig. 3 - Dimensions, mm
Optional discharge
50VZ/PZ 030
Transport skid
Power connection
38VZ/PZ 030
Optional discharge
Cable inlet
Transport skid
Drain 3/4" gas
40PZ 030
Optional discharge
Cable inlet
Transport skid
Drain
When designing an installation, always use up-to-date drawings, available from your local Carrier office
8
Fig. 4 - Dimensions, mm
50VZ/PZ 031
Optional
discharge
Transport skid
Power connection
38VZ/PZ 031
Optional discharge
Cable inlet
Transport skid
Drain 3/4" gas
40PZ 031
Optional discharge
Cable inlet
Transport skid
Drain
When designing an installation, always use up-to-date drawings, available from your local Carrier office
9
Fig. 5 - Dimensions, mm
50VZ/PZ 040
Optional
discharge
Transport skid
Power connection
38VZ/PZ 040
Optional discharge
Cable inlet
Transport skid
Drain 3/4" gas
40PZ 040
Optional discharge
Cable inlet
Transport skid
Drain
When designing an installation, always use up-to-date drawings, available from your local Carrier office
10
Fig. 6 - Dimensions, mm
50VZ/PZ 045-055
Optional
discharge
Transport skid
Power connection
38VZ/PZ 045-055
Optional discharge
Cable inlet
Transport skid
Drain 3/4" gas
40PZ 045-055
Optional discharge
Cable inlet
Transport skid
Drain
When designing an installation, always use up-to-date drawings, available from your local Carrier office
11
Fig. 7 - Dimensions, mm
50VZ/PZ 065-075
Optional
discharge
Transport skid
Power connection
38VZ/PZ 065-075
Optional discharge
Cable inlet
Transport skid
Drain 3/4" gas
40PZ 065-075
Optional discharge
Cable inlet
Transport skid
Drain
When designing an installation, always use up-to-date drawings, available from your local Carrier office
12
Fig. 8 - Service area, mm
50VZ/PZ
38VZ/PZ
40PZ
*
**
Service space behind the unit depends on whether or not the unit is installed with outdoor air ducts. It is also necessary to leave space for cleaning and inspection of the outdoor heat
exchanger.
Space for removal of the air filter and the indoor or outdoor section belt and pulley transmission is required on the right and left hand side.
13
Fig. 9 - Centre of gravity, mm (approx.)
50VZ/PZ (all sizes)
1
50VZ/PZ
015
025
030
031
040
045
055
065
075
XG
YG
ZG
381
583
526
627
772
434
639
758
448
723
743
444
858
703
450
1116
755
525
1122
773
527
1324
767
521
1359
781
527
Measured from point
Fig. 10 - Centre of gravity, mm (approx.)
38VZ/PZ (all sizes)
▲Y
Z
▲
1
38VZ/PZ
015
025
030
031
040
045
055
065
075
XG
YG
ZG
349
382
586
583
552
479
595
518
493
707
509
485
831
498
463
1081
512
542
1085
509
556
1289
495
566
1313
489
577
▲
Measured from point
X
Fig. 11 - Centre of gravity, mm (approx.)
Z
▲
40PZ (all sizes)
▲Y
1
▲
X
40PZ
015
025
030
031
040
045
055
065
075
XG
YG
ZG
499
230
301
771
296
286
776
314
307
776
314
307
982
308
389
1261
341
452
1257
338
417
1453
337
360
1510
333
364
Measured from point
Fig. 12 - Weight distribution, kg (approx.)
50VZ/PZ (all sizes)
Support
points
Support
points
Control box
50VZ
015
025
030
031
040
045
055
065
075
45
81
37
67
70
106
84
130
68
127
72
135
106
125
82
97
164
178
132
144
178
267
158
239
190
281
171
252
215
276
198
254
235
302
217
279
50PZ
015
025
030
031
040
045
055
065
075
47
83
39
69
72
109
86
133
70
130
74
138
110
129
87
101
169
183
137
149
184
272
164
244
196
287
178
258
221
282
205
260
241
308
224
285
Fig. 13 - Weight distribution, kg (approx.)
38VZ/PZ (all sizes)
Support
points
Support
points
Control box
38VZ
015
025
030
031
040
045
055
065
075
38
49
35
30
62
82
58
48
63
80
59
50
66
81
60
53
115
128
83
62
131
146
136
132
134
151
154
138
151
164
152
141
166
180
167
155
38PZ
015
025
030
031
040
045
055
065
075
40
51
37
32
64
84
61
51
65
82
62
53
70
85
64
58
120
133
88
67
136
151
142
138
141
157
160
144
157
170
158
148
172
186
173
162
Fig. 14 - Weight distribution, kg (approx.)
40PZ (all sizes)
Support
points
Air filters
40PZ
015
025
030
031
040
045
055
065
075
14
27
14
23
32
34
36
38
35
36
39
40
35
36
39
40
54
55
59
62
45
48
103
101
50
54
107
106
56
55
113
111
64
63
120
118
Indoor air discharge (50VZ/PZ)
Indoor air discharge (40PZ)
The 50VZ/PZ units leave the factory with the indoor unit air
discharge set to vertical, as indicated in the dimensional figures. It
can be changed to horizontal discharge by following the steps
below:
The 40PZ units leave the factory with the air discharge set to
horizontal, as indicated in the dimensional figures. It can be
changed to vertical discharge by following the steps below:
Change from vertical to horizontal discharge without
changing the position of the motor
a. Detach the side access panels .
b. Remove the drive belt(s) (only sizes 50VZ/PZ 015,
045, 055, 065, 075).
c. Detach rear blanking plate and fan supply air ducts .
d. Detach the fans from the reinforcement flanges of the
upper panel and from the U-bracket .
e. Detach the U-bracket from the angle iron attached to
the base . Remove the U-bracket .
f. Install the fans, attaching them to the reinforcement
flanges of the rear panel and base support .
g. Install strengthening support , attaching it between the
fan and the roof (only sizes 50VZ/PZ 045-055-065-075).
h. Install blanking plate in the upper panel and fan supply
air ducts in the unit rear panel.
i. Replace the drive belt(s) and ensure that the tension and
alignment are correct (only sizes 50VZ/PZ 015, 045, 055,
065, 075).
j. Replace the access panels .
Change from horizontal to vertical discharge without
changing the position of the motor
a. Detach the side access panels .
b. Remove the drive belt(s) (only sizes 40PZ 015, 045,
055, 065, 075).
c. Detach top blanking plate and fan supply air ducts .
d. Detach strengthening support between the fan and the
roof (only sizes 40PZ 045-055-065-075). Discard the
support.
e. Detach the fans from the reinforcement flanges of the rear
panel and from base support .
f. Install U-bracket , included with the unit, by attaching it
to base support .
g. Install the fans, attaching them to the reinforcement
flanges of the upper panel and to U-bracket .
h. Install blanking plate in the rear panel and fan supply
air ducts in the upper unit panel.
i. Replace the drive belt(s) and ensure that the tension and
alignment are correct (only units 40PZ 015, 045, 055, 065,
075).
j. Replace the access panels .
See figures 15 and 16.
See figures 15 and 16.
Change from vertical to horizontal discharge with changing
the position of the motor
a. Detach the side access panels .
b. Remove the drive belt(s) .
c. Detach rear blanking plate and fan supply air ducts .
d. Detach the fans from the reinforcement flanges of the
upper panel and from the U-bracket .
e. Detach the U-bracket from the angle iron attached to
the base . Remove the U-bracket .
f. For units 50VZ/PZ 025, 030, 031 and 040 change the
motor to the other fan.
g. For units 50VZ/PZ 045, 055, 065 and 075 detach the drive
base together with the motor and reposition it on the
opposite side.
h. Remove the fan pulley and reposition it on the other
side.
i. Install the fans, attaching them to the reinforcement
flanges of the rear panel and base support .
j. Install strengthening support , attaching it between the
fan and the roof (only sizes 50VZ/PZ 045-055-065-075).
k. Install blanking plate in the upper panel and fan supply
air ducts in the unit rear panel.
l. Replace the drive belt(s) and ensure that the tension and
alignment are correct.
m. Replace the access panels .
Change from horizontal to vertical discharge with
changing the position of the motor
a. Detach the side access panels .
b. Remove the drive belt(s) .
c. Detach top blanking plate and fan supply air ducts .
d. Detach strengthening support between the fan and the
roof (only sizes 40PZ 045-055-065-075). Discard the
support.
e. Detach the fans from the reinforcement flanges of the rear
panel and from base support .
f. Install U-bracket , included with the unit, by attaching it
to base support .
g. For units 40PZ 025, 030, 031, 040 change the motor to the
other fan.
h. For units 40PZ 045, 055, 065, 075 detach the drive base
together with the motor and reposition it on the opposite
side.
i. Remove the fan pulley and reposition it on the other
side.
j. Install the fans, attaching them to the reinforcement
flanges of the upper panel and to U-bracket .
k. Install blanking plate in the rear panel and fan supply
air ducts in the upper unit panel.
l. Replace the drive belt(s) and ensure that the tension and
alignment are correct.
m. Replace the access panels .
See figures 15 and 16.
See figures 15 and 16.
16
Fig. 15 - Repositioning unit air discharge
(50VZ/PZ 025, 030, 031, 040
40PZ 025, 030, 031, 040)
Front view
Side view (vertical discharge)
Rear view
Side view (horizontal discharge)
Legend
Side access panel
Rear discharge panel
Top panel
Angle iron attached to the base
U-bracket
Blanking plate
Fan supply air ducts
Drive belt(s)
Fan pulley
Fig. 16 - Repositioning unit air discharge
(50VZ/PZ 015, 045, 055, 065, 075
40PZ 015, 045, 055, 065, 075)
Front view
Side view (vertical discharge)
Rear view
Side view (horizontal discharge)
Legend
Side access panel
Rear discharge panel
Top panel
Angle iron attached to the base
U-bracket
Blanking plate
Fan supply air ducts
Drive belt(s)
Fan pulley
Strengthening support
17
Fan performance
Power input, kW
Available static pressure, Pa
50VZ/PZ 015 outdoor fan (38VZ/PZ 015) standard
transmission
Air flow, l/s
Indoor fan
Outdoor fan
Pulley open
Standard
r/s
Superior
r/s
0
1
2
3
4
5
Factory
Closed
1
2
3
4
5
3.5
19.6
18.75
18.33
17.67
17
16.33
17.33
23.08
22.18
21.28
20.38
19.5
18.6
18
Power input, kW
Power input, kW
Available static pressure, Pa
Air flow, l/s
Air flow, l/s
Curve
Available static pressure, Pa
50VZ/PZ 015 indoor fan (40PZ 015) optional larger
transmission
50VZ/PZ 015 indoor fan (40PZ 015) standard
transmission
Standard
r/s
15.25
Superior
r/s
Fan performance
Air flow, l/s
Air flow, l/s
Air flow, l/s
Power input, kW
Available static pressure, Pa
50VZ/PZ 025 outdoor fan (38PV/PZ 025) optional
larger transmission
Power input, kW
Available static pressure, Pa
50VZ/PZ 025 outdoor fan (38VZ/PZ 025) standard
transmission
Indoor fan
Power input, kW
Power input, kW
Available static pressure, Pa
Available static pressure, Pa
50VZ/PZ 025 indoor fan (40PZ 025) optional larger
transmission
50VZ/PZ 025 indoor fan (40PZ 025) standard
transmission
Air flow, l/s
Outdoor fan
Curve
Pulley open
Standard
r/s
Superior
r/s
Standard
r/s
Superior
r/s
0
1
2
3
4
5
Factory
Closed
1
2
3
4
5
3.5/2*
19.8
18.33
17.58
16.83
16.08
15.33
16.45
20.5
19.83
19.16
18.5
17.83
17.16
17.42
16.66
15.92
15.16
14.42
13.66
15.92
19.33
18.46
17.6
16.73
15.86
15
* The first value is for the indoor unit pulley; the second value is for the outdoor unit
pulley
19
Fan performance
Air flow, l/s
Air flow, l/s
Air flow, l/s
Power input, kW
Available static pressure, Pa
Air flow, l/s
Outdoor fan
Curve
Pulley open
Standard
r/s
Superior
r/s
Standard
r/s
Superior
r/s
0
1
2
3
4
5
Factory
Closed
1
2
3
4
5
2.5/2*
19.33
18.5
17.66
16.92
15.83
14.92
17.29
21.76
20.76
19.76
18.76
17.76
16.76
18.2
17.36
16.53
15.7
14.86
14.03
16.53
20.5
19.58
18.66
17.75
16.83
15.92
* The first value is for the indoor unit pulley; the second value is for the outdoor unit
pulley
20
50VZ/PZ 030/031 outdoor fan (38PV/PZ 030/031)
optional larger transmission
Power input, kW
Available static pressure, Pa
50VZ/PZ 030/031 outdoor fan (38VZ/PZ 030/031)
standard transmission
Indoor fan
Power input, kW
Power input, kW
Available static pressure, Pa
Available static pressure, Pa
50VZ/PZ 030/031 indoor fan (40PZ 030/031) optional
larger transmission
50VZ/PZ 030/031 indoor fan (40PZ 030/031) standard
transmission
Fan performance
Air flow, l/s
Air flow, l/s
Air flow, l/s
Power input, kW
Available static pressure, Pa
50VZ/PZ 040 outdoor fan (38PV/PZ 040) optional
larger transmission
Power input, kW
Available static pressure, Pa
50VZ/PZ 040 outdoor fan (38VZ/PZ 040) standard
transmission
Indoor fan
Power input, kW
Power input, kW
Available static pressure, Pa
Available static pressure, Pa
50VZ/PZ 040 indoor fan (40PZ 040) optional larger
transmission
50VZ/PZ 040 indoor fan (40PZ 040) standard
transmission
Air flow, l/s
Outdoor fan
Curve
Pulley open
Standard
r/s
Superior
r/s
Standard
r/s
Superior
r/s
0
1
2
3
4
5
Factory
Closed
1
2
3
4
5
2.5/2.5*
21.92
21.08
20.25
19.42
18.5
17.58
19.84
24.33
23.42
22.5
21.58
20.66
19.75
15
14.5
14
13.5
13
12.5
13.75
17
16.33
15.66
15
14.33
13.66
* The first value is for the indoor unit pulley; the second value is for the outdoor unit
pulley
21
Fan performance
Air flow, l/s
Air flow, l/s
Air flow, l/s
Power input, kW
Available static pressure, Pa
Air flow, l/s
Outdoor fan
Curve
Pulley open
Standard
r/s
Superior
r/s
Standard
r/s
Superior
r/s
0
1
2
3
4
5
Factory
Closed
1
2
3
4
5
3/3*
19.5
18.66
17.92
17.16
16.42
15.66
17.16
21.33
20.58
19.83
19.08
18.33
17.58
12.25
11.75
11.25
10.75
10.25
9.75
10.75
12.83
12.33
11.83
11.33
10.83
10.33
* The first value is for the indoor unit pulley; the second value is for the outdoor unit
pulley
22
50VZ/PZ 045 outdoor fan (38PV/PZ 045) optional
larger transmission
Power input, kW
Available static pressure, Pa
50VZ/PZ 045 outdoor fan (38VZ/PZ 045) standard
transmission
Indoor fan
Power input, kW
Power input, kW
Available static pressure, Pa
Available static pressure, Pa
50VZ/PZ 045 indoor fan (40PZ 045) optional larger
transmission
50VZ/PZ 045 indoor fan (40PZ 045) standard
transmission
Fan performance
Air flow, l/s
Air flow, l/s
Air flow, l/s
Power input, kW
Available static pressure, Pa
50VZ/PZ 055 outdoor fan (38PV/PZ 055) optional
larger transmission
Power input, kW
Available static pressure, Pa
50VZ/PZ 055 outdoor fan (38VZ/PZ 055) standard
transmission
Indoor fan
Power input, kW
Power input, kW
Available static pressure, Pa
Available static pressure, Pa
50VZ/PZ 055 indoor fan (40PZ 055) optional larger
transmission
50VZ/PZ 055 indoor fan (40PZ 055) standard
transmission
Air flow, l/s
Outdoor fan
Curve
Pulley open
Standard
r/s
Superior
r/s
Standard
r/s
Superior
r/s
0
1
2
3
4
5
Factory
Closed
1
2
3
4
5
4/2*
21.16
20.42
19.66
18.92
18.16
17.42
18.16
22.75
22
21.16
20.42
19.58
18.83
13
12.5
12
11.5
11
10.5
12
15
14.5
14
13.5
13
12.5
* The first value is for the indoor unit pulley; the second value is for the outdoor unit
pulley
23
Fan performance
Air flow, l/s
Air flow, l/s
Air flow, l/s
Power input, kW
Available static pressure, Pa
Air flow, l/s
Outdoor fan
Curve
Pulley open
Standard
r/s
Superior
r/s
Standard
r/s
Superior
r/s
0
1
2
3
4
5
Factory
Closed
1
2
3
4
5
3.5/2*
21.5
20.66
19.83
19
18.16
17.33
18.58
22.66
21.9
21.13
20.36
19.6
18.83
12.75
12.25
11.75
11.25
10.83
10.42
11.75
14.33
13.83
13.33
12.73
12.33
11.83
* The first value is for the indoor unit pulley; the second value is for the outdoor unit
pulley
24
50VZ/PZ 065 outdoor fan (38PV/PZ 065) optional
larger transmission
Power input, kW
Available static pressure, Pa
50VZ/PZ 065 outdoor fan (38VZ/PZ 065) standard
transmission
Indoor fan
Power input, kW
Power input, kW
Available static pressure, Pa
Available static pressure, Pa
50VZ/PZ 065 indoor fan (40PZ 065) optional larger
transmission
50VZ/PZ 065 indoor fan (40PZ 065) standard
transmission
Fan performance
Air flow, l/s
Air flow, l/s
Air flow, l/s
Power input, kW
Available static pressure, Pa
50VZ/PZ 075 outdoor fan (38PV/PZ 075) optional
larger transmission
Power input, kW
Available static pressure, Pa
50VZ/PZ 075 outdoor fan (38VZ/PZ 075) standard
transmission
Indoor fan
Power input, kW
Power input, kW
Available static pressure, Pa
Available static pressure, Pa
50VZ/PZ 075 indoor fan (40PZ 075) optional larger
transmission
50VZ/PZ 075 indoor fan (40PZ 075) standard
transmission
Air flow, l/s
Outdoor fan
Curve
Pulley open
Standard
r/s
Superior
r/s
Standard
r/s
Superior
r/s
0
1
2
3
4
5
Factory
Closed
1
2
3
4
5
3/2.5*
22.66
21.9
21.13
20.36
19.6
18.83
20.36
23.58
22.75
21.92
21.08
20.25
19.42
14.33
13.83
13.33
12.83
12.33
11.83
13.08
15
14.5
14
13.5
13
12.5
* The first value is for the indoor unit pulley; the second value is for the outdoor unit
pulley
25
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.
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.
-
When installing the unit on the ground, select a site which
is not subject to flooding (outdoor unit).
Consult all applicable rules and standards which govern
the installation of air conditioning equipment.
Both the indoor and the outdoor unit are supplied with
transport skids. These skids must be removed, except
when vibration absorbers are installed.
Rigging
1. When rigging, use spreaders to prevent damage to the
panels. 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 15°.
IMPORTANT: Make sure that all unit panels are fixed in place
before moving. Raise and set down the unit carefully.
Follow all safety codes. Wear safety glasses and work gloves.
Use a quenching cloth for unbrazing operations.
Fig. 17 - Rigging (50VZ/PZ)
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 for use when repairing "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 70°C so only trained or
qualified personnel should access areas protected by access
panels.
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 Table 1).
Allow sufficient space for servicing and air flow around
the unit (see Fig. 8).
Select a location free of dust or foreign matter which may
cause coil clogging.
26
A
Fig. 18 - Rigging (38VZ/PZ)
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. The different air flows and static pressures which
each unit can supply, are shown in the fan performance tables.
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 which 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
which are adequately insulated to avoid condensation and
thermal leakage.
At the points where the ducts join the unit, it is
recommended to use flexible connections which 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.
NOTE: All duct sizing and design work should be carried out
by qualified technicians.
A
A
Fig. 19 - Rigging (40PZ)
Condensate drainage
50VZ/PZ and 38VZ/PZ units
The indoor unit evacuates condensate water via the condensate
pan of the outdoor heat exchanger (38VZ/PZ) which incorporates two male ø 3/4" gas drain connections, one for each
side of the unit. Depending on the installation site, either of
these drains can be used, and the unused drain should be plugged.
40PZ units
These units incorporate a condensate pan with a drain pipewith
an outside diameter of 25 mm.
The connection to the drain pipe can be vertical (Fig. 20) or
horizontal (Fig. 21).
•
•
Vertical drain: Remove the prepunched knockout(s) in the
unit base.
Horizontal drain: Remove the prepunched knockout(s) in
the side of the unit base.
Fig. 20 - Vertical drain (40PZ)
Drain pipe OD 25 mm
Drain pan
Unit base
Field-supplied
A
IMPORTANT: The unit should be correctly levelled.
27
Fig. 21 - Horizontal drain (40PZ)
Example:
Drain pipe OD 25 mm
Nominal supply: 400-3-50
Drain pan
Unit base
Field-supplied
AB = 404 V
BC = 399 V
AC = 394 V
Average voltage =
404 + 399 + 394
3
= 399 = 400 V
Determine maximum deviation from average voltage:
Electrical connections
AB = 404 - 400 = 4
BC = 400 - 399 = 1
AC = 400 - 394 = 6
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.
Largest deviation is 6 volts. Percentage voltage imbalance is
therefore:
The unit power supply cables must not be lighter than normal
flexible polychloroprene covering cable (designation H05 RN-F).
6
400
Route all cables through the conduits incorporated in the unit
(50VZ/PZ or 38VZ/PZ) to the main disconnect switch terminals
(see wiring diagram).
VERY MPORTANT: The installer must protect the unit power
supply line with automatic disconnect devices, a thermalmagnetic switch and a differential disconnect switch, suitable
for the installation and in according with applicable legislation.
Voltage to the unit must be within 2% of the voltage and 10%
of the current indicated on the nameplate. Contact your local
power company for correction of an incorrect line voltage.
Take special care when making the earth connection. This
cable must be connected first and it must be longer than
the power cable.
WARNING: Operation of the unit on improper line voltage
constitutes abuse and is not covered by the Carrier warranty.
IMPORTANT: To ensure the correct power supply, it is necessary
to first determine the cable section. This must take into account
the unit electrical data (see electrical data table) and the line
length (max. permissible voltage drop 5%).
If the unit includes electric heat, this must be taken into account
for the supply line sizing.
x 100 = 1.5%
Electrical connection between the units (38VZ/PZ and
40PZ)
The general power supply for the complete system (indoor and
outdoor unit) must be made via the outdoor unit (38VZ/PZ).
Consult the wiring diagram that is supplied with the units. This
will show all power connections to be made between the 38VZ/
PZ unit and the 40PZ unit.
The unit connection cables must not be lighter than normal
flexible polychloroprene covering cable (designation H05 RN-F)
with a wire section that is adequate for the 40PZ unit power
consumption.
The power supply for the electric heater of the indoor unit must
be provided from the main disconnect switch.
Thermostat connection
Never operate a unit if the voltage imbalance exceeds 2%. The
following formula must be used to determine the percentage of
voltage imbalance.
Thermostat/unit connection must be via a loom (wire section
1 mm2) manufactured in accordance with the wiring diagram
accompanying the unit.
Voltage imbalance % =
Largest deviation from average voltage
Average voltage
Follow the instructions supplied with the control for thermostat
assembly and handling.
The general rules below should be taken into account:
28
NOTE 1: This control is compatible with any kind of
electromechanical or electronic control (without anticipation
resistors) with the following features:
Voltage at 24 V AC
50VZ units standard connections:
R
Connection to 24 V
L
Protection device indication
C
Common 24 V
G
Ventilation
Y1
First stage cooling
Y2
Second stage cooling
W1 First stage heating (option)
W2 Second stage heating (option)
Refrigerant line selection
General
When designing refrigerant lines the following must be kept in
mind:
-
Depending on the unit arrangement:
Fig. 22 - Refrigerant lines option A
Outdoor unit
Heat pump (discharge line)
50PZ units standard connections:
R
Connection to 24 V
L
Protection device indication
C
Common 24 V
G
Ventilation
Y1
First stage (cooling/heating)
Y2
Second stage (cooling/heating)
W1 First stage heating (option)
O
Reversing valve*
* The O connection is activated in cooling.
NOTE 2: 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 3: The thermostat cables should be separate from any
220 V or 380 V cable.
Refrigerant line connections (38VZ/PZ and 40PZ)
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.
IMPORTANT: Always use refrigerant-grade deoxidized and
dehydrated copper tubing between the indoor and outdoor
units.
Gas line
Cooling (suction line)
Heat pump
Liquid line
Cooling
Indoor unit
Suction/discharge 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.
Fig. 23 - Refrigerant lines option B
Indoor unit
Heat pump
Liquid line
Cooling
Heat pump (discharge line)
Gas line
Cooling (suction line)
Outdoor unit
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
6.9 Pa is maintained for at least 2 hours.
Charge the refrigerant circuit with the necessary amount
of R-407C refrigerant (in accordance with table 1 and the
length of the refrigerant lines).
Check there are no refrigerant leaks.
Suction/discharge line:
For heat pumps a siphon is required in the base of the
vertical pipe run.
The intermediate siphon can be omitted.
For cooling only units siphons are not required.
Most unfavourable condition: the suction/discharge
speed in the vertical pipe run must be more than 6 m/s.
29
Fig. 25 - Discharge line
SP
For both option A (Figure 22) and option B (Figure 23) 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.
Subcooling can be contained in the liquid and suction
lines (maximum 15 m) of the units.
For each metre of refrigerant pipe installed, refrigerant has
to be added in accordance with table 3.
EE
D(
m/s
)
Table 3 - Refrigerant charge (g/m)
Diameter
1/2"
5/8"
3/4"
7/8"
1-1/8"
1-3/8"
Liquid line
75
120
180
250
420
645
Suction line
14
23
34
47
81
123
Sizing
Suction/discharge line
The gas line is the suction line in cooling and the discharge
line in heat pump operation. Its diameter is calculated for the
most unfavourable condition. This can be as a suction or as a
discharge line and has to be checked afterwards for the other
line type.
For example, in the configuration shown in option A (the suction
speed will produce the most unfavourable condition, and the
gas line diameter will be calculated for suction. Afterwards, the
calculation should be checked for discharge. The diameter
calculation for suction and discharge lines is done in the same
way using the corresponding drawing (see Figs. 24 and 25).
Fig. 24 - Suction line
Legend:
38VZ/PZ 015 + 40PZ 015
38VZ/PZ 031 + 40PZ 031
38VZ/PZ 030 + 40PZ 030
38VZ/PZ 055 + 40PZ 055
38VZ/PZ 040 + 40PZ 040
38VZ/PZ 065 + 40PZ 065
38VZ/PZ 025 + 40PZ 025
38VZ/PZ 045 + 40PZ 045
38VZ/PZ 075 + 40PZ 075
From Figures 24 and 25, 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.
Liquid line:
The liquid line diameter can be selected using table 4.
)
m/s
D(
EE
SP
Table 4 - Liquid line
Models
38VZ/PZ 015 + 40PZ 015
38VZ/PZ 025 + 40PZ 025
38VZ/PZ 030 + 40PZ 030
38VZ/PZ 031 + 40PZ 031
38VZ/PZ 040 + 40PZ 040
38VZ/PZ 045 + 40PZ 045
38VZ/PZ 055 + 40PZ 055
38VZ/PZ 065 + 40PZ 065
38VZ/PZ 075 + 40PZ 075
Total equivalent length
Up to 10 m
From 10-30 m
From 30-50 m
5/8"
5/8"
5/8"
5/8"
5/8"
5/8"
5/8"
5/8"
3/4"
5/8"
5/8"
3/4"
5/8"
5/8"
5/8"
3/4"
3/4"
7/8"
5/8"
3/4"
3/4"
5/8"
5/8"
3/4"
3/4"
7/8"
7/8"
Necessary checks/precautions before start-up
Legend:
38VZ/PZ 015 + 40PZ 015
38VZ/PZ 031 + 40PZ 031
38VZ/PZ 030 + 40PZ 030
38VZ/PZ 055 + 40PZ 055
38VZ/PZ 040 + 40PZ 040
38VZ/PZ 065 + 40PZ 065
38VZ/PZ 025 + 40PZ 025
38VZ/PZ 045 + 40PZ 045
38VZ/PZ 075 + 40PZ 075
30
-
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.
-
Check for proper fan rotation.
Refrigerant charge
Gas tightness testing and dehydration
50VZ/PZ 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
38VZ/PZ and 40PZ 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.
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 include the
Master Link II electronic control. The operation of the control
is explained in the 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, after a reasonable time, 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 Table 2.
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.
Expansion valve or metering device.
Compressors: hermetic reciprocating or scroll
compressors depending on model, cooled by suction gas.
They incorporate internal protection.
Filter drier and Schrader valves.
Safety elements: high, low pressurestat.
All units are supplied with the correct 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
WARNING: If any brazing is to be done the refrigerant circuit
must be filled with nitrogen. Combustion of refrigerant
produces toxic phosgene gas.
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.
31
-
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 in the refrigerant charge indicated on the nameplate,
plus the required charge for the refrigerant connection
lines, if the system is a split system.
NOTE: This operation must be done by a qualified technician.
Description of unit protection devices
The unit includes the following unit protection devices:
Internal compressor protector to avoid overheating.
Short-cycle protection (included in the main electronic
board).
Outdoor fan motor thermomagnetic switch.
Indoor 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.
Table 7 - Heat pump operation
Zone
Air temperature
Dry bulb
Wet bulb
Indoor
Maximum
27°C
-
Outdoor
Maximum
Minimum
24°C
-15°C
18°C
-
OPTIONS AND ACCESSORIES
Head pressure control kit
Electric heating
Compressor crankcase heater (standard on 50PZ)
Hot water coil
Economizer
Outdoor air filter
User interface
Protection grille
Minimum opening potentiometer
Volt-free contacts
Optional communications
Return air sensor
Superior drive
38VZ/PZ for vertical discharge
Cut-out
Cut-in
Reset
*2844 kPa
*265 kPa
1863 kPa
363 kPa
Automatic
Automatic
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.
32
kW* 9.6 17.5 19.6 19.6 27.3 33.4 35.3 41
43.8
l/s
0.46 0.84 0.94 0.94 1.31 1.60 1.69 1.96 2.09
kPa 13
20
14.5 14.5 13.5 21
23
33.5 37.5
* Indoor air temperature 20°C and entering/leaving water temperature 50°C/45°C.
Table 9
WARNING: Alteration of factory settings other than the design
set-point, without manufacturer's authorisation, may void the
warranty.
Zone
x
x
015 025 030 031 040 045 055 065 075
Heating capacity
Water flow
Pressure drop
Heating capacity
Water flow
Pressure drop
Table 6 - Cooling operation
x
x
Table 8
Unit
These units have been designed to operate within the following
limits:
x
x
x
x
x
x
x
x
x
The heating coil performances are in accordance with Eurovent
conditions and are shown in tables 8 and 9.
* Factory-fitted
Operating limits
x
x
x
x
x
x
This option/accessory consists of the water heating coil, the air
flow equalising plate, the side access panel and fixing
components.
Unit
High pressurestat
Low pressurestat
Accessory
x
x
x
x
Hot water heating coil
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.
Table 5 - Pressure switch settings
Option
015 025 030 031 040 045 055 065 075
kW* 15.2 27.9 30.4 30.4 43.4 51.5 54.6 63.9 68.5
l/s
0.36 0.67 0.72 0.72 1.04 1.23 1.31 1.52 1.64
kPa 9
13
9
9
9
13
14.5 21
24
* Indoor air temperature 20°C and entering/leaving water temperature 70°C/60°C.
Water connection
The entering and leaving water connections are all threaded
male gas connections with the diameters shown in Table 10.
Table 10
Unit
015
025
030
Ø connection
1”
1”
1-1/4” 1-1/4” 1-1/4” 1-1/2” 1-1/2” 1-1/2” 1-1/2”
031
040
045
055
065
075
Installation
The standard installation of the water heating coil is made by
positioning the connection manifolds on the same side as the
motor of the evaporator unit. If necessary, it can be connected
to the opposite side. In this case the coil must be turned by 180°.
The installation sequence is as follows:
a. Disconnect the power supply to the unit.
b. Remove the side access panels.
c. Loosely screw in the 4 screws provided to attach the
heating coil to the headers of the evaporator coil (leaving
a free space of 3-4 mm untightened).
d. Install the heating coil, inserting the semi-attached screws
in the grooves of the headers.
e. Fix the 4 screws provided to attach the heating coil.
f. Install the perforated plate in the upper part of the coil,
covering the space that remains between the coil and the
unit top panel.
g. Connect heating coil sensor BT4 to terminals 39 and 40 of
the indoor unit terminal box, and from here to terminals
39 and 40 of the outdoor unit.
h. Change the position of dipswitch 3 on the main board AO
to position “ON”.
i. For water heating coils with a proportional valve an
extension board A2 must be installed and connected in
accordance with the wiring diagram for this option. In all
cases, both for the all-or-nothing control valve and for
the proportional valve the elctrical conections must be
made in accordance with the wiring diagram.
j. Install the blanking plate, supplied with the coil, on the corresponding side, after punching out the prepunched holes for
the entering and leaving water connections of the manifolds.
Table 11
Model
Unit
015 025 030 031 040 045 055 065 075
6 kW
Cooling only
Heat pump
x
x
12 kW
Cooling only
Heat pump
x
x
15 kW
Cooling only
Heat pump
18 kW
Cooling only
Heat pump
18 (9+9) kW*
Cooling only
Heat pump
x
x
x
x
x
x
x
x
x
x
x
x
x
x
24 (12+12) kW* Cooling only
Heat pump
x
* 2-stage heating
Fig. 26
x
x
x
x
x
x
x
Electric resistance heaters
This option/accessory consists of a frame with shielded electric
heaters and a control box, incorporated in the same frame, with
all electrical and protection components required to guarantee
total safety. For the available capacities see Table 11.
Fig. 27
Installation
The standard installation of the electric heating coil is made by
positioning the control box on the same side as the motor of
the evaporator unit.
If necessary, it can be positioned on the opposite side. In this
case the coil must be turned by 180°.
VERY IMPORTANT: If the coil is installed on the opposite side,
it is NECESSARY to change the position of the two thermal
protectors to the opposite longitudinal beam, i.e. the thermal
protectors must always be positioned in the upper part of the
coil.
The installation sequence is as follows:
a. Disconnect the power supply to the unit.
b. Remove the side access panels.
c. Loosely screw in the 4 screws provided to attach the
electric heater to the headers of the evaporator coil
(leaving a free space of 3-4 mm untightened).
d. Install the electric heater, inserting the semi-attached
screws in the grooves of the headers.
e. Fix the 4 screws provided to attach the electric heater.
f. Make all electrical connections in accordance with the
wiring diagram supplied with this option.
g. Install the blanking plates in their correct positions.
33
GENERAL MAINTENANCE
SERVICE
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.
Indoor fan air adjustment
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
±10% of the nominal voltage limits.
-
-
-
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.
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 air 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 an optional filter
may be placed at the outdoor air inlet. Check for unusual
compressor noise.
Controls: Check the operation of all electric controls,
high and low pressurestats, etc.
The drive is factory set in accordance with the tables on pages
18-25. When indoor pressure and air flow requirements differ
from nominal ratings, the motor pulley can be adjusted for
different available static pressure values.
To change the fan speed (see Fig. 28):
1. Move the motor along its track in order to remove the
belt.
2. Loosen the pulley setscrews and rotate as necessary.
3. Tighten the setscrews .
4. Replace the belt(s) in the channel of the pulley.
5. Tighten the belt(s), using the tension screw nut and
washer .
To align fan and motor pulleys:
1. Loosen fan pulley setscrews. Slide fan pulley along the
pulley shaft and align with the motor using a ruler,
making sure that it is parallel to the belt.
2. Tighten the fan pulley setscrews.
To adjust the belt tension, loosen the motor mounting plate
bolts and slide the motor mounting plate until the belt is as
shown in Fig. 29.
Fig. 28 - Fan speed adjustment
Legend
1
Motor support
2
Motor pulley
3
Setscrews
4
Motor
5
Belt
6
Tensioning screw
7
Fan pulley
8
Fan scroll
34
Fig. 29 - To align fan and motor pulleys
Transformation to split system (50VZ/PZ units)
All units can be changed from a packaged to a split system, as
described below:
-
-
1
2
3
4
5
6
7
Fixed flange
Setscrews
Movable flange
Straight-edge must be parallel with belt
Motor and fan shafts must be parallel
Pulleys
Motor and fan shafts must be parallel
-
Lubrication
-
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.
-
Disconnect the unit from the power supply.
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 air filters.
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.
Make the electrical connections.
FINAL RECOMMENDATIONS
Servicing recommendations
-
-
-
-
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.
The unit you have purchased has undergone strict quality
control procedures before leaving the factory.
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.
NOTE: The manufacturer does not accept responsibility for
any malfunctions resulting from misuse of the equipment.
35
TROUBLESHOOTING CHART
A list of possible faults, as well as the probable cause and suggested solutions is shown in Table 12. In the event of a unit
malfunction it is recommended to disconnect the power supply and ascertain the cause.
Table 12 - 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
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. 15021-20, 11.2000. Supersedes order No.: New
Manufacturer reserves the right to change any product specifications without notice.
Remedy
Connect power supply
Close switch
Check voltage and remedy the deficiency
Reset
Replace contactor
Replace compressor
Replace contactor
Replace compressor
Reclaim the charge, pull a vacuum, recharge
the system with the quantity indicated on the
name plate
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
Printed on Totally Chlorine-Free Paper.
Printed in the Netherlands
AM-036918