Danfoss Maneurop NTZ Series Instruction Manual

Maneurop® reciprocating
compressors NTZ
R404A - R507 - 60 Hz
Application guidelines
http://danfoss.us.com/

Application guidelines
3FRCC.PC.002.A4.22
Content
Maneurop® reciprocating compressors..............................................................................................5
Features .................................................................................................................................................................................5
Specications........................................................................................................................................6
Technical specications and nominal ratings..........................................................................................................6
Versions..................................................................................................................................................................................6
Compressor reference ......................................................................................................................................................6
Dimensions ...........................................................................................................................................7
1 cylinder...............................................................................................................................................................................7
2 cylinders.............................................................................................................................................................................8
4 cylinders.............................................................................................................................................................................9
Electrical connections and wiring .....................................................................................................10
Voltage application range.............................................................................................................................................10
Single phase electrical characteristics......................................................................................................................10
Nominal capacitor values and relays.........................................................................................................................10
Single phase motor protection and suggested wiring diagram.....................................................................10
Single phase PSC wiring with trickle circuit ...........................................................................................................11
Single phase CSR wiring with trickle circuit ...........................................................................................................11
Single phase CSR wiring without trickle circuit.....................................................................................................11
Three phase electrical characteristics.......................................................................................................................12
Three phase motor protection and suggested wiring diagram......................................................................12
Wiring diagram with pump-down cycle..................................................................................................................12
Wiring diagram without pump-down cycle...........................................................................................................13
IP rating................................................................................................................................................................................13
Motor protection..............................................................................................................................................................13
Voltage unbalance...........................................................................................................................................................13
Approval and certications ...............................................................................................................14
Approvals and certicates.............................................................................................................................................14
Pressure Equipment Directive 97/23/EC..................................................................................................................14
Low voltage directive 2006/95 EC..............................................................................................................................14
Machine directive 2006/42/EC ....................................................................................................................................14
Internal free volume........................................................................................................................................................14
Operating conditions .........................................................................................................................15
Refrigerants and lubricants ..........................................................................................................................................15
Operating envelope R404A / R507.............................................................................................................................15
Discharge temperature protection............................................................................................................................15
Operating limits................................................................................................................................................................16
System design recommendations.....................................................................................................17
Piping design.....................................................................................................................................................................17
Suction line.........................................................................................................................................................................17
Discharge line....................................................................................................................................................................17
Oil charge and oil separator.........................................................................................................................................18
Filter driers..........................................................................................................................................................................18
Suction pressure control................................................................................................................................................18
Suction line heat exchanger.........................................................................................................................................18
Cycle rate limit...................................................................................................................................................................19
Liquid refrigerant control and charge limits ..........................................................................................................19
O-cycle migration..........................................................................................................................................................19
Liquid oodback during operation ...........................................................................................................................19
Crankcase heater..............................................................................................................................................................20
Liquid line solenoid valve & pump-down ...............................................................................................................20
Suction accumulator.......................................................................................................................................................20

Application guidelines
4FRCC.PC.002.A4.22
Content
Sound and vibration management...................................................................................................21
Sound ...................................................................................................................................................................................21
Vibration..............................................................................................................................................................................21
Installation and service......................................................................................................................22
System cleanliness...........................................................................................................................................................22
Compressor handling, mounting and connection ..............................................................................................22
Compressor connection to the system ....................................................................................................................23
System pressure test .......................................................................................................................................................23
Leak detection...................................................................................................................................................................24
Vacuum pump-down and dehydration procedure .............................................................................................24
Start-up................................................................................................................................................................................24
Refrigerant charging.......................................................................................................................................................25
Oil charge and oil level...................................................................................................................................................25
Installation checks ...........................................................................................................................................................25

Application guidelines
5FRCC.PC.002.A4.22
Maneurop® reciprocating compressors
Features The Maneurop® NTZ series from Danfoss
Commercial Compressors is a range of hermetic
reciprocating compressors for low evaporating
temperature applications. These compressors
replace the former LTZ range.
The NTZ series is engineered as a true low
temperature compressor, optimised at -31°F with
an extended evaporating temperature range
from -49°F up to 14°F. The compressors can be
operated at a return gas temperature (suction
gas temperature) of 68°F even at low evaporating
temperatures.
A liquid injection system is not required. All
components are of high quality and precision to
assure a long product life.
NTZ compressors have a large internal free
volume that helps to reduce the risk of liquid
hammering. The electrical motor is fully suction
gas cooled which means that no additional body
cooling is required and it allows the compressor
to be insulated with an acoustic hood when the
installation requirements call for extra low sound
characteristics.

Application guidelines
6FRCC.PC.002.A4.22
Specifications
Compressor reference
(indicated on the compressor
nameplate)
Technical specications
and nominal ratings
Versions Available equipment version:
• R1: Rotolock suction and discharge connections, 3/8" are oil equalisation connection, threaded
sight glass.
NT Z4L048 A R1 A
Motor voltage code
Z: Polyolester lubricant
Displacement in cm³ / rev.
UL index indicator
NT: New low temperature
reciprocating compressors
Evolution index,
indicating compressor
modications
Equipment version
(R1: Rotolock connections,
oil equalisation connection
and sight glass)
Motor protection
(L: Internal Motor Protection)
Compressor
model Swept volume in3/rev
Displacement Nominal ratings* Number
of
cylinders
Oil
charge
oz
Net
weight
lbs
60 Hz
3500 rpm
m3/hr
60 Hz
Cooling capacity
Btu/h EER
NTZ048 2.93 356 4888 3.93 1 32 46
NTZ068 4.15 504 8185 4.12 1 32 51
NTZ096 5.86 712 9917 4.12 2 61 77
NTZ108 6.59 801 11470 4.01 2 61 77
NTZ136 8.30 1009 15133 3.98 2 61 77
NTZ215 13.12 1594 23363 4.20 4 132 137
NTZ271 16.54 2010 32430 4.37 4 132 141
(*) Motor code 4 operating conditions: R404A, Evap. temp.: -25°F, Cond. temp.: 105°F, RGT: 40°F, SC: 0°F
For full NTZ data details and capacity tables refer to Online Datasheet Generator: www.danfoss.com/odsg

Application guidelines
7FRCC.PC.002.A4.22
Dimensions
1 cylinder
Oil equalisation
3/8”
PTC crankcase heater
0.98
3.85
Schrader
1/4”
10.4
13.1
Suction rotolock
1”1/4
Discharge rotolock
1”
2.68
3.22
4.29 4.65
35° 33°
2.68
Suc
tion 5.78
Discharge 5.59
6.28
0.67
17°
4.84
1.54
Threaded oil
sight glass
All dimensions in inch
141
ø 8.8
2.68
HM8-40
0.91
0.59
Silent block
IP rating: 55 (with cable gland)
Spade connectors
1/4" AMP-AWE
Earth M4-12
Ø 0.83 in
Knock-out Ø 0.83 in
Terminal box
Rotolock connections size Pipe sizing Rotolock valve
Suction Discharge Suction Discharge Suction Discharge
NTZ048
NTZ068 1”1/4 1” 5/8” 1/2” V09 V06

Application guidelines
8FRCC.PC.002.A4.22
Dimensions
2 cylinders
3.85(1)
4.61 (2)
2.37 6.13
8
Suction 7.03
Discharge 6.93
9.91
ø 11.3
16.3
1.28
Threaded oil
sight glass
All dimensions in inch
Schrader
1/4"
PTC
crankcase heater
3.77
0.81
5.71
4.91
7.41
6.73
8
38
3.22 (1)
3.86 (2)
2.9 2.67
10.43
Suction rotolock
1"3/4
Discharge rotolock
1"1/4
Oil equalisation
3/8"
(1) NTZ096 - 108 - 136 except NTZ136-1
(2) NTZ136-1
HM8-40
0.91
0.59
Silent block
IP rating: 55 (with cable gland)
Spade connectors
1/4" AMP-AWE
Earth M4-12
Ø 0.83 in
Knock-out Ø 0.83 in
Terminal box (1)
IP rating: 54 (with cable gland)
Terminal box (2)
Rotolock connections size Pipe sizing Rotolock valve
Suction Discharge Suction Discharge Suction Discharge
NTZ096 - NTZ108 1”3/4 1”1/4 7/8” 3/4” V07 V04
NTZ136 1”3/4 1”1/4 1"1/8” 3/4” V02 V04

Application guidelines
9FRCC.PC.002.A4.22
Dimensions
4 cylinders
Ø 13.9
20.4
4.61
6.10
9.13
3.9
Oil equalisation
3/8"
Mounting hole for
PTC crankcase heater
All dimensions in inch
15°
15°
15°
9.68
8.07
155°
9.68
Suction rotolock
1"3/4
Discharge rotolock
1"1/4
9.2
8.27
4.9
8.23
3.86
3.74
Threaded oil
sight glass
Schrader 1/4 "
1.18
0.75
HM12-50
Silent block
IP rating: 54 (with cable gland)
Terminal box
Rotolock connections size Pipe sizing Rotolock valve
Suction Discharge Suction Discharge Suction Discharge
NTZ215 - NTZ271 1”3/4 1”1/4 1"1/8” 3/4” V02 V04

Application guidelines
10 FRCC.PC.002.A4.22
Electrical connections and wiring
Voltage application range
Single phase electrical
characteristics
Nominal capacitor values
and relays
* PSC: Permanent Split Capacitor
CSR: Capacitor Start Run
(1) Run capacitors: 440 volts
(2) Start capacitors: 330 Volts
Single phase motor
protection and suggested
wiring diagram
Single phase compressor motors are internally
protected by a temperature / current-sensing
bimetallic protector which senses the main and
start winding current as well as motor winding
temperature. If the motor were to be overloaded
and the protector trips, it might take up to several
hours to reset and restart the compressor.
The standard CSR wiring system provides addi-
tional motor torque at start-up, by the use of a
start capacitor in combination with a run capac-
itor. The start capacitor is only connected during
the starting operation and a potential relay
disconnects it after the start sequence. This sytem
can be used for refrigerant circuits with capillary
tubes or expansion valves.
Motor voltage code Nominal voltage Voltage application range
1 208-230 V / 1 / 60 Hz 187 – 253 V
3 200-230 V / 3 / 60 Hz 180 – 253 V
4380-400 V / 3 / 50 Hz
460 V / 3 / 60 Hz 340 – 440 V (50 Hz) 414 – 506 V (60Hz)
5 230 V / 1 / 50 Hz 207 – 253 V
9 380 V / 3 / 60 Hz 342 – 418 V
LRA - Locked Rotor
Current (A) MCC - Maximum Continuous Current (A) Winding resistance (Ω) ( ± 7 % at 68° F)
Motor Code 1 5 1 5 1 5
Winding run start run start
NTZ048 43.7 37 13.2 11 1.32 4.16 1.62 3.95
NTZ068 72 53 21 17 0.94 2.01 1.05 3.19
NTZ096 97 31 0.45 1.84
NTZ108 97 33 0.45 1.84
NTZ136 140 41 0.36 1.73
Models
PSC/CSR* CSR only
Run capacitors (1) Start capacitors (2) Start
relay
(A) µF (C) µF (B) µF
50 Hz NTZ048 20 10 100
RVA6AMKL
NTZ068 20 10 100
60 Hz
NTZ048 15 10 100
NTZ068 25 25 135
NTZ096 30 15 135
NTZ108 30 15 135
NTZ136 30 15 135

Application guidelines
11FRCC.PC.002.A4.22
Electrical connections and wiring
Single phase PSC wiring
with trickle circuit
IOL Motor protector
A & C Run capacitors
C Common
S Start winding (auxiliary)
R Run winding (main)
Single phase CSR wiring
with trickle circuit
IOL Motor protector
A & C Run capacitors
B Start capacitor
C Common
S Start winding (auxiliary)
R Run winding (main)
IOL Motor protector
A + C Run capacitors
B Start capacitor
C Common
S Start winding (auxiliary)
R Run winding (main)
Capacitors A and C are replaced by a
single capacitor of size A + C
Single phase CSR wiring
without trickle circuit