Carrier 50VZ Manual

1
50VZ/PZ
38VZ/PZ+40PZ
Vertical Air-Cooled
Split-System Cooling Units
and Heat Pumps
Installation, operation and maintenance instructions

2
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

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 Ph 3: .......................................... Amperes
Control circuit voltage: ................................... Volts Control circuit fuse: ........................................................................................ Amperes
Main circuit breaker rating: ............................................................................................................................................................................................................
PHYSICAL DATA:
Outdoor unit : Indoor unit:
Entering air temp.: ................................................................ oC Entering air temp.: .............................................................. oC
Leaving air temp.: ................................................................ oC Leaving air temp.: .............................................................. oC
Pressure drop (air): .............................................................. kPa Pressure drop (air): ............................................................. kPa
Discharge air pressure: ....................................................... Pa Discharge air pressure: ...................................................... Pa
Fan motor input: Ph. 1: ........................................... Volts Fan motor input: 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: ............................................... oC
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

4
Table 1 - Physical data
50VZ (40PZ/38VZ) 015 025 030 031 040 045 055 065 075
Nom. cooling capacity* kW 14.60 22.74 29.75 27.80 35.05 45.21 53.90 63.89 74.35
Unit weight kg
50VZ 230 390 402 410 618 842 894 943 1033
40PZ 78 140 150 150 230 297 317 335 365
38VZ 152 250 252 260 388 545 577 608 668
Compressor Hermetic reciprocating Scroll
Oil charge l 1.8 3.9 3.9 1.8 x 2 4 x 2 4 x 2 4 x 2 4 x 2 6.6 x 2
Oil type Maneurop 160PZ Mobil EAL Arctic 22CC Maneurop 160SZ
Refrigerant R-407C
Refrigerant charge** kg 3.80 6.62 7.43 3.80 x 2 4.70 x 2 6.70 x 2 8.80 x 2 9.40 x 2 11.0 x 2
Evaporator section (40PZ) Copper tubes, aluminium fins
Face area m20.34 0.64 0.69 0.69 0.84 1.10 1.10 1.34 1.34
Rows...fins/m 3...551 4...472 4...472 4...472 4...472 4...551 6...472 6...551 6...551
Test pressure bar 30 30 30 30 30 30 30 30 30
Condenser section (38VZ) Copper tubes, aluminium fins
Face area m20.49 0.87 0.87 0.87 1.19 1.73 1.73 2.12 2.12
Rows...fins/m 5...551 4...551 5...551 5...551 5...551 5...551 6...551 6…551 6...551
Test pressure bar 30 30 30 30 30 30 30 30 30
Evaporator fan (40PZ) Double inlet centrifugal type
Quantity 1 2 2 2 2 2 2 2 2
Nominal air flow l/s 960 1490 1690 1690 2190 2640 2910 3140 3530
Air flow range l/s 768-1152 1192-1788 1352-2028 1352-2028 1752-2628 2112-3168 2328-3492 2512-3768 2824-4236
Nominal static pressure (dry/wet) Pa 90/70 90/70 120/100 120/100 140/120 170/150 180/160 200/180 210/180
Condenser fan (38VZ) Double inlet centrifugal type
Quantity 1 2 2 2 2 2 2 2 2
Nominal air flow l/s 1470 3020 2780 2780 3610 4580 5080 6030 6890
Air flow range l/s 1176-1764 2416-3624 2224-3336 2224-3336 2888-4332 3664-5496 4064-6096 4824-7236 5512-8268
Nominal static pressure Pa 50 50 60 60 60 75 100 100 100
Air filter Filter class M1
Quantity 1 2 2 2 2 3 3 3 3
Width x height mm 800x443 596x540 596x590 596x590 716x590 676x587 616x587 749x587 749x587
Thickness mm 15 15 15 15 15 15 15 15 15
Condensing unit 38VZ*** 015 025 030 031 040 045 055 065 075
Nom. cooling capacity kW 13.47 19.97 27.02 24.80 32.54 40.30 48.21 59.13 71.10
* 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 kg
50PZ 238 400 412 427 638 864 919 968 1058
40PZ 78 140 150 150 230 297 317 335 365
38PZ 160 260 262 277 408 567 602 633 693
Compressor Hermetic reciprocating Scroll
Oil charge l 1.8 3.9 3.9 1.8 x 2 4 x 2 4 x 2 4 x 2 4 x 2 6.6 x 2
Oil type Maneurop 160PZ Mobil EAL Arctic 22CC Maneurop 160SZ
Refrigerant R-407C
Refrigerant charge*** kg 4.02 7.20 7.71 3.94 x 2 5.40 x 2 7.50 x 2 9.20 x 2 9.50 x 2 11.20 x 2
Indoor section (40PZ) Copper tubes, aluminium fins
Face area m20.34 0.64 0.69 0.69 0.84 1.10 1.10 1.34 1.34
Rows...fins/m 3...551 4...472 4...472 4...472 4...472 4...551 6...472 6...551 6...551
Test pressure bar 30 30 30 30 30 30 30 30 30
Outdoor section (38PZ) Copper tubes, aluminium fins
Face area m20.49 0.87 0.87 0.87 1.19 1.73 1.73 2.12 2.12
Rows...fins/m 5...551 4...551 5...551 5...551 5...551 5...551 6...551 6…551 6...551
Test pressure bar 30 30 30 30 30 30 30 30 30
Indoor fan (40PZ) Double inlet centrifugal type
Quantity 1 2 2 2 2 2 2 2 2
Nominal air flow l/s 960 1490 1690 1690 2190 2640 2910 3140 3530
Air flow range l/s 768-1152 1192-1788 1352-2028 1352-2028 1752-2628 2112-3168 2328-3492 2512-3768 2824-4236
Nominal static pressure (dry/wet) Pa 90/70 90/70 120/100 120/100 140/120 170/150 180/160 200/180 210/180
Outdoor fan (38PZ) Double inlet centrifugal type
Quantity 1 2 2 2 2 2 2 2 2
Nominal air flow l/s 1470 3020 2780 2780 3610 4580 5080 6030 6890
Air flow range l/s 1176-1764 2416-3624 2224-3336 2224-3336 2888-4332 3664-5496 4064-6096 4824-7236 5512-8268
Nominal static pressure Pa 50 50 60 60 60 75 100 100 100
Air filter Filter class M1
Quantity 1 2 2 2 2 3 3 3 3
Width x height mm 800x443 596x540 596x590 596x590 716x590 676x587 616x587 749x587 749x587
Thickness mm 15 15 15 15 15 15 15 15 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.

5
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 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 44.2
Maximum current drawn*** A 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
Condensing unit 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 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 43.9
Maximum current drawn++ A 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
* 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) 015 025 030 031 040 045 055 065 075
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
Cooling** 7.2 7.2 11.2 11.2 13.6 13.6 14.6 14.6 18.1 18.1 21.6 21.6 25.4 25.4 30.2 30.2 38.5 38.5
Heating*** 6.6 6.6 11.1 11.1 12.4 12.4 12.7 12.7 17.5 17.5 20.8 20.8 23.7 23.7 27.1 27.1 34.3 34.3
Nominal current drawn A
Cooling** 23.7 13.7 33.2 19.2 38.4 22.2 46.0 26.6 55.0 31.8 66.1 38.2 73.3 42.4 88.0 50.9 118.5 68.6
Heating*** 22.5 13.0 33.2 19.2 35.8 20.7 41.5 24.0 52.2 30.2 63.7 36.8 70.7 40.9 82.0 47.4 109.8 63.5
Effective power input kW
Cooling 6.7 6.7 10.3 10.3 12.5 12.5 13.6 13.6 16.8 16.8 19.1 19.1 22.2 22.2 26.3 26.3 34.1 34.1
Heating 6.1 6.1 10.3 10.3 11.4 11.4 11.6 11.6 16.2 16.2 18.4 18.4 20.5 20.5 23.2 23.2 29.8 29.8
Effective current drawn A
Cooling 22.1 12.7 30.5 17.7 35.3 20.4 42.8 24.8 51.0 29.5 59.4 33.8 64.1 37.1 76.6 44.3 105.0 60.8
Heating 20.8 12.0 30.8 17.8 32.9 19.0 37.9 21.9 48.3 28.0 56.4 32.6 61.2 35.4 70.2 40.6 95.4 55.2
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
Cooling+8.0 8.0 12.4 12.4 15.2 15.2 16.3 16.3 21.6 21.6 25.3 25.3 30.4 30.4 34.9 34.9 44.5 44.5
Heating++ 7.5 7.5 13.1 13.1 15.8 15.8 14.4 14.4 20.3 20.3 23.7 23.7 28.1 28.1 32.8 32.8 41.6 41.6
Maximum current drawn A
Cooling+26.3 15.2 36.8 21.3 42.9 24.8 51.4 29.7 65.6 37.9 77.4 44.7 87.7 50.7 101.7 58.8 137.0 79.3
Heating++ 25.6 14.8 39.2 22.7 45.6 26.4 47.1 27.2 60.6 35.0 72.6 41.9 83.8 48.5 99.2 57.4 133.2 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.

6
Fig. 1 - Dimensions, mm
50VZ/PZ 015
38VZ/PZ 015
Optional discharge
40PZ 015
Optional
discharge
Power connection
Drain 3/4" gas
Cable inlet
Optional discharge
Transport skid
Drain
Cable inlet
Transport skid
Transport skid
When designing an installation, always use up-to-date drawings, available from your local Carrier office

7
Fig. 2 - Dimensions, mm
50VZ/PZ 025
38VZ/PZ 025 Optional discharge
40PZ 025
Optional discharge
Power connection
Optional
discharge
Drain 3/4" gas
Cable inlet
Transport skid
Drain
Cable inlet
When designing an installation, always use up-to-date drawings, available from your local Carrier office
Transport skid
Transport skid

8
Fig. 3 - Dimensions, mm
50VZ/PZ 030
Optional discharge
38VZ/PZ 030 Optional discharge
40PZ 030 Optional discharge
Power connection
Drain 3/4" gas
Cable inlet
Transport skid
Drain
Cable inlet
When designing an installation, always use up-to-date drawings, available from your local Carrier office
Transport skid
Transport skid

9
Fig. 4 - Dimensions, mm
50VZ/PZ 031
38VZ/PZ 031
Optional discharge
40PZ 031
Optional
discharge
Power connection
Drain 3/4" gas
Cable inlet
Optional discharge
Transport skid
Drain
Cable inlet
When designing an installation, always use up-to-date drawings, available from your local Carrier office
Transport skid
Transport skid

10
Fig. 5 - Dimensions, mm
50VZ/PZ 040
Optional
discharge
38VZ/PZ 040
Optional discharge
40PZ 040
Optional discharge
Power connection
Cable inlet
Drain 3/4" gas
Cable inlet
Drain
Transport skid
When designing an installation, always use up-to-date drawings, available from your local Carrier office
Transport skid
Transport skid

11
Fig. 6 - Dimensions, mm
50VZ/PZ 045-055
Optional
discharge
38VZ/PZ 045-055
Optional discharge
40PZ 045-055
Optional discharge
Power connection
Cable inlet
Drain 3/4" gas
Cable inlet
Drain
Transport skid
When designing an installation, always use up-to-date drawings, available from your local Carrier office
Transport skid
Transport skid

12
Fig. 7 - Dimensions, mm
50VZ/PZ 065-075
Optional
discharge
38VZ/PZ 065-075
Optional discharge
40PZ 065-075
Optional discharge
Power connection
Cable inlet
Drain 3/4" gas
Cable inlet
Drain
Transport skid
When designing an installation, always use up-to-date drawings, available from your local Carrier office
Transport skid
Transport skid

13
Fig. 8 - Service area, mm
50VZ/PZ
* 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.
38VZ/PZ
40PZ

Fig. 9 - Centre of gravity, mm (approx.)
50VZ/PZ (all sizes)
Fig. 10 - Centre of gravity, mm (approx.)
38VZ/PZ (all sizes)
Fig. 11 - Centre of gravity, mm (approx.)
40PZ (all sizes)
50VZ/PZ 015 025 030 031 040 045 055 065 075
XG 381 627 639 723 858 1116 1122 1324 1359
YG 583 772 758 743 703 755 773 767 781
ZG 526 434 448 444 450 525 527 521 527
Measured from point
38VZ/PZ 015 025 030 031 040 045 055 065 075
XG 349 583 595 707 831 1081 1085 1289 1313
YG 382 552 518 509 498 512 509 495 489
ZG 586 479 493 485 463 542 556 566 577
Measured from point
40PZ 015 025 030 031 040 045 055 065 075
XG 499 771 776 776 982 1261 1257 1453 1510
YG 230 296 314 314 308 341 338 337 333
ZG 301 286 307 307 389 452 417 360 364
Measured from point
11
11
1
11
11
1
11
11
1
▲
X
▲
Y
▲
Z
▲
Z
X
▲
▲
Y

Fig. 12 - Weight distribution, kg (approx.)
50VZ/PZ (all sizes)
Fig. 13 - Weight distribution, kg (approx.)
38VZ/PZ (all sizes)
Control box
Control box
Support 50VZ
points 015 025 030 031 040 045 055 065 075
45 70 68 106 164 178 190 215 235
81 106 127 125 178 267 281 276 302
37 84 72 82 132 158 171 198 217
67 130 135 97 144 239 252 254 279
Support 50PZ
points 015 025 030 031 040 045 055 065 075
47 72 70 110 169 184 196 221 241
83 109 130 129 183 272 287 282 308
39 86 74 87 137 164 178 205 224
69 133 138 101 149 244 258 260 285
Support 38VZ
points 015 025 030 031 040 045 055 065 075
38 62 63 66 115 131 134 151 166
49 82 80 81 128 146 151 164 180
35 58 59 60 83 136 154 152 167
30 48 50 53 62 132 138 141 155
Support 38PZ
points 015 025 030 031 040 045 055 065 075
40 64 65 70 120 136 141 157 172
51 84 82 85 133 151 157 170 186
37 61 62 64 88 142 160 158 173
32 51 53 58 67 138 144 148 162
Fig. 14 - Weight distribution, kg (approx.)
40PZ (all sizes)
Air filters
Support 40PZ
points 015 025 030 031 040 045 055 065 075
14 32 35 35 54 45 50 56 64
27 34 36 36 55 48 54 55 63
14 36 39 39 59 103 107 113 120
23 38 40 40 62 101 106 111 118

16
Indoor air discharge (50VZ/PZ)
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:
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 .
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 .
See figures 15 and 16.
Indoor air discharge (40PZ)
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 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.
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.

17
Fig. 15 - Repositioning unit air discharge
(50VZ/PZ 025, 030, 031, 040
40PZ 025, 030, 031, 040)
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)
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
Front view
Front view
Rear view
Side view (vertical discharge) Side view (horizontal discharge)
Rear view
Side view (vertical discharge) Side view (horizontal discharge)

18
Fan performance
50VZ/PZ 015 indoor fan (40PZ 015) standard
transmission
50VZ/PZ 015 indoor fan (40PZ 015) optional larger
transmission
50VZ/PZ 015 outdoor fan (38VZ/PZ 015) standard
transmission
Indoor fan Outdoor fan
Curve Pulley open Standard Superior Standard Superior
r/s r/s r/s r/s
0 Closed 19.6 23.08
1 1 18.75 22.18
2 2 18.33 21.28
3 3 17.67 20.38
4 4 17 19.5
5 5 16.33 18.6
Factory 3.5 17.33 15.25
Available static pressure, Pa
Available static pressure, Pa
Available static pressure, Pa
Air flow, l/s
Power input, kW
Air flow, l/s
Power input, kW
Air flow, l/s
Power input, kW

19
Fan performance
50VZ/PZ 025 indoor fan (40PZ 025) standard
transmission
50VZ/PZ 025 indoor fan (40PZ 025) optional larger
transmission
50VZ/PZ 025 outdoor fan (38VZ/PZ 025) standard
transmission
Indoor fan Outdoor fan
Curve Pulley open Standard Superior Standard Superior
r/s r/s r/s r/s
0 Closed 19.8 20.5 17.42 19.33
1 1 18.33 19.83 16.66 18.46
2 2 17.58 19.16 15.92 17.6
3 3 16.83 18.5 15.16 16.73
4 4 16.08 17.83 14.42 15.86
5 5 15.33 17.16 13.66 15
Factory 3.5/2* 16.45 15.92
* The first value is for the indoor unit pulley; the second value is for the outdoor unit
pulley
Available static pressure, Pa
50VZ/PZ 025 outdoor fan (38PV/PZ 025) optional
larger transmission
Air flow, l/s
Power input, kW
Available static pressure, Pa
Air flow, l/s
Power input, kW
Available static pressure, Pa
Air flow, l/s
Power input, kW
Available static pressure, Pa
Air flow, l/s
Power input, kW

20
Fan performance
50VZ/PZ 030/031 indoor fan (40PZ 030/031) standard
transmission
50VZ/PZ 030/031 indoor fan (40PZ 030/031) optional
larger transmission
50VZ/PZ 030/031 outdoor fan (38VZ/PZ 030/031)
standard transmission
Indoor fan Outdoor fan
Curve Pulley open Standard Superior Standard Superior
r/s r/s r/s r/s
0 Closed 19.33 21.76 18.2 20.5
1 1 18.5 20.76 17.36 19.58
2 2 17.66 19.76 16.53 18.66
3 3 16.92 18.76 15.7 17.75
4 4 15.83 17.76 14.86 16.83
5 5 14.92 16.76 14.03 15.92
Factory 2.5/2* 17.29 16.53
* The first value is for the indoor unit pulley; the second value is for the outdoor unit
pulley
50VZ/PZ 030/031 outdoor fan (38PV/PZ 030/031)
optional larger transmission
Available static pressure, Pa
Air flow, l/s
Power input, kW
Available static pressure, Pa
Air flow, l/s
Power input, kW
Available static pressure, Pa
Air flow, l/s
Power input, kW
Available static pressure, Pa
Air flow, l/s
Power input, kW