Danfoss 120H1446 User guide

120H1446
Danfoss
Brand
Danfoss
Model
120H1446
Type
User guide
Danfoss scroll compressors
DSF270 to 530
Single and manifold
50Hz - R32
Application guidelines
www.danfoss.com
Content
GENERAL INFORMATION ........................ 4
PRODUCT INFORMATION .......................5
Features.....................................................5
Overview ..................................................................... 5
How do IDVs work? .................................................. 5
Compressor model designation .............6
Nomenclature ........................................................... 6
Technical specications ........................... 7
50 Hz data Single compressor ............................. 7
Performances 50 Hz R32 Single compressor . 7
Tandem and trio performances .......................... 8
Dimensions ...............................................9
Single compressors ................................................. 9
Connection Details ................................................10
Tandem assemblies .............................................. 11
Trio assemblies ........................................................ 12
Electrical data, connections and wiring 13
Motor voltage ..........................................................13
Wiring connections ............................................... 13
IP rating ......................................................................14
Terminal box temperature ..................................14
Three phase electrical characteristics ............ 14
Motor protection....................................................15
Approval and certicates ......................17
Low voltage directive ...........................................17
Machines directive ................................................ 17
Pressure equipment directive ........................... 17
Internal free volume.............................................. 17
SYSTEM DESIGN .....................................18
Design piping .........................................18
General requirements ..........................................18
Tandem and trio requirements ......................... 19
Suction washer position ......................................20
Design compressor mounting ..........................21
General requirements ..........................................21
Single requirements..............................................21
DSF540E to DSF1590T ...........................................21
Manage oil in the circuit ........................22
Requirement ............................................................22
System evaluation .................................................22
Test, criteria and solutions .................................. 22
Manage sound and vibration ................23
Compressor sound radiation .............................23
Mechanical vibrations .......................................... 24
Gas pulsation ........................................................... 24
Manage operating envelope ................. 25
Requirement ............................................................25
High and low pressure protection ................... 25
Discharge temperature protection .................25
System evaluation .................................................26
Test, criteria and solutions .................................. 26
Manage superheat .................................27
Requirement ............................................................ 27
System evaluation .................................................27
Test, criteria and solutions .................................. 27
Manage o cycle migration ...................29
Requirement ............................................................29
System evaluation .................................................29
Provide power supply and electrical
protection ...............................................31
Wiring information ................................................ 31
Soft starts .................................................................. 33
Control logic ...........................................34
Safety control logic requirements ................... 34
Cycle rate limit requirements ............................34
Oil management logic recommendations ...34
Defrost logic recommendations / Reversible
systems ......................................................................34
Pump-down logic recommendations ............35
Reduce moisture in the system .............36
Requirements ..........................................................36
Solutions ...................................................................36
INTEGRATION INTO SYSTEM ................37
Assembly line procedure ....................... 37
Compressor storage ..............................................37
Compressor holding charge ..............................37
Handling ...................................................................37
Piping assembly......................................................38
System pressure test and leak detection ......38
Vacuum evacuation and moisture removal 39
Refrigerant charging .............................................39
Dielectric strength and insulation resistance
tests ............................................................................. 39
Commissioning .......................................40
Preliminary check...................................................40
Initial start-up ..........................................................40
System monitoring ................................................40
Dismantal and disposal ....................................... 41
ORDERING INFORMATION ...................42
Packaging ...............................................42
Ordering codes .......................................43
Accessories .............................................. 46
3AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
General Information
Danfoss scroll compressors are designed and
manufactured according to the state of the art
and to valid European regulations. Particular
emphasis has been placed on safety and
reliability. Related instructions are highlighted
with the following icons:
This icon indicates instructions to avoid
safety risk.
This icon indicates instructions to avoid
reliability risk.
The purpose of this guideline is to help
customers qualify compressors in the unit.
You are strongly advise to follow these
instructions. For any deviation from the
guidelines, please contact Danfoss Technical
Support. In any case, Danfoss accepts no
liability as a result of the improper integration
of the compressor into the unit by the system
manufacturer.
R
Refrigerant When choosing a refrigerant, dierent aspects
must be taken into consideration:
• Legislation (now and in the future)
• Safety
• Application envelope in relation to expected
running conditions
• Compressor capacity and eciency
• Compressor manufacturer recommendations &
Guidelines
Additional points could inuence the nal
choice:
• Environmental considerations
• Standardisation of refrigerants and lubricants
• Refrigerant cost
• Refrigerant availability
The DSF compressors can be used with
refrigerant R32
R32 is a pure HFC refrigerant with a zero Ozone
Depletion Potential (ODP=0) and a low Global
Warming Potential (GWP: 677/AR5; 675/AR4).
R32 leads to higher discharge temperatures than
R410A but it oers higher cooling capacities and
better eciencies compared to R410A
R32 is classied A2L with low ammability
properties. Please refer to European regulations
and directives about the use of refrigerant of the
A2L safety group (EN378, EN60335). Outside
Europe refer to the local regulation
R32
4 AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
DSF series scroll compressor benet from
an improved design to achieve the highest
eciency and increased life time.
Features
Danfoss Intermediate Discharge Valves (IDVs)
are located close to the discharge side of the
compressor. They reduce excessive compression
of refrigerant under part-load conditions while
maintaining the same cooling capacity. The IDVs
open when discharge pressure falls below the
built-in optimization point. They adapt the eort
of the motor to the varying load and pressure
conditions in the system, thus reducing the eort
of the motor and its electrical consumption
and improving the system’s seasonal energy
eciency.
How do IDVs work?
Overview
PRODUCT Information
Intermediate discharge valves (IDVs)
increase seasonal eciency
Heat shield lowers the heat transfer
between discharge and suction gas
and the sound level
Internal Non Return Valve (INRV)
prevents excessive leak rate from
high pressure side
Lead free polymer bearings improve
behavior under poor lubrication
conditions
Integrated discharge gas
temperature protection (DGT)
Patented motor cap for optimal
motor cooling
Organ pipe masters oil circulation
in manifold conguration.
Patented gas path ow with
gas intake design induce higher
resistance to liquid slugging
5AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Compressor model designation
Danfoss scroll compressor DSF for R32 is available
as single compressor and can be assembled
in tandem or trio combinations. The example
below presents the compressor nomenclature
which equals the technical reference as shown
on the compressor nameplate. Code numbers
for ordering are listed in section “Ordering
information”.
Nomenclature
Family, lubricant
& refrigerant
DSF: Scroll, POE lubricant,
R32
Motor protection
A: Electronic module, 24V AC,
B: Electronic module, 110-240V,
Suction and discharge connections
A: Brazed connections
Family,
lubricant
& refrigerant
Nominal
capacity
Approvals Voltage Version Evolution
index
Evolution index
A~Z
A4DSF AAB530
Motor voltage code
4: 400V/3/50 Hz
Motor index
Nominal capacity
in thousand Btu/h at 60Hz
ARI conditions
6 AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Technical specications
50 Hz data
Single compressor
Performances 50 Hz R32
Single compressor
Model
Swept volume Displacement (50 Hz) Displacement (60 Hz) Oil charge Net weight
cm
3
/rev cu.in/rev m
3
/h cu.ft/h m
3
/h cu.ft/h dm
3
oz kg lbs
DSF270 227.6 13.89 39.6 1398 - - 6.1 206 114 251
DSF325 276.2 16.85 48.1 1699 - - 6.1 206 117 258
DSF485 407. 2 24.85 70.9 2502 - - 6.1 206 176 388
DSF530 442.6 27.01 77 2719 - - 6.1 206 176 388
Model
Nominal cooling
capacity
Power
input
COP E.E.R.
W Btu/h kW W/W Btu/h/W
50 Hz
DSF270 60037 204853 17.98 3.34 11.40
DSF325 72501 247380 21.50 3.37 11.51
DSF485 107102 365443 31.67 3.38 11.54
DSF530 116998 399209 34.27 3.41 11.65
Displacement at nominal speed: 2900rpm at 50 Hz
Net weight with oil charge
TR: Ton of Refrigeration, Standard rating conditions Evaporating temperature: 5°C (41°F), Condensing temperature: 50°C (122°F), Superheat: 10K (18°F), Subcooling: 0K (0°F)
EER: Energy Eciency Ratio
COP: Coecient Of Performance
Subject to modication without prior notication.
Data given for motor code 4 compressor with above conditions
For regular updates and detailed capacities, please refer to Coolselector®2 www.coolselector.danfoss.com
7AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Technical specications
The impact of manifolding on compressor
performances depends widely of the customer
system itself. Therefore, it would be unrealistic
to provide data that corresponds accurately to
a particular system. In rst approach, to support
compressors selection at full load, the manifold
performances can be considered as the sum of
capacities of the compressors composing the
manifold. For better accuracy, the customer
should integrate the appropriate weighing
coecients according to his system very pressure
drops and part load levels.
Tandem and trio
performances
8 AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Dimensions
Single compressors
Compressor model
D H H1 H2 L1 L2 L3
Outline drawing number
mm inch mm inch mm inch mm inch mm inch mm inch mm inch
DSF270 320 12.6 653 25.71 302 11.87 618 24.33 427 16.81 371 14.61 371 14.61
8556208
DSF325 320 12.6 653 25.71 302 11.87 618 24.33 427 16.81 371 14.61 371 14.61
DSF485 333 13.11 726 28.58 302 11.87 667 26.26 429 16.89 371 14.61 371 14.61
8556198
DSF530 333 13.11 726 28.58 302 11.87 667 26.26 429 16.89 371 14.61 371 14.61
L1
L3
L2
Ø D
H
H2
H1
L2
H
H2
H1
Ø D
L3
L1
9AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Dimensions
Connection Details
DSF270-325 DSF485-530
Suction connection Brazed 1"5/8 Brazed 1"5/8
Discharge connection Brazed 1"1/8 Brazed 1"3/8
Oil sight glass Threaded (1"1/8 – 18 UNEF)
Oil equalization connection Rotolock 2"1/4
Oil drain connection Female ¼" Flare incorporating a Schrader valve
Low pressure gauge port (Shrader) Male ¼" Flare incorporating a Schrader valve
10 AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Tandem assemblies
H
L
L1
H1
D
D
H
L
L1
H1
L1
H1
H
L
D
Dimensions
Tandem model
Composition
Cp1 + Cp2
L D H L1 H1
Outline drawing number
mm inch mm inch mm inch mm inch mm inch
DSF540E DSF270+DSF270 1025 40.35 527 20.75 701 27.6 535 21.06 211 8.31
8556228
DSF595U DSF270+DSF325 1025 40.35 527 20.75 701 27.6 535 21.06 211 8.31
8556228
DSF650E DSF325+DSF325 1025 40.35 527 20.75 701 27.6 535 21.06 211 8.31
8556228
DSF800U DSF270+DSF530 1025 40.35 546 21.5 774 30.5 535 21.06 211 8.31
8556207
DSF970E DSF485+DSF485 1025 40.35 553 21.77 774 30.5 640 25.2 211 8.31
8556205
DSF855U DSF325+DSF530 1025 40.35 546 21.5 774 30.5 640 25.2 211 8.31
8556220
DSF1060E DSF530+DSF530 1025 40.35 553 21.77 774 30.5 640 25.2 211 8.31
8556205
Tandems to be achieved by assembly of individual compressors
By convention, the last letter of tandems designation have been set to help to discern easily which type of manifold we are considering.
U : Uneven tandem
E : Even tandem
Tandem assemblies
11AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Trio assemblies
Trio model Composition
L D H L1 H1
Outline drawing
number
mm inch mm inch mm inch mm inch mm inch
DSF810T DSF270+DSF270 +DSF270 1467 57.76 543 21.38 701 27.6 535 min 21.06 211 8.31
8556217
DSF975T DSF325+DSF325 +DSF325 1467 57.76 543 21.38 701 27.6 536 min 21.06 211 8.31
8556217
DSF1590T DSF530+DSF530 +DSF530 1520 59.84 573 22.56 774 30.5 640 min 25.19 244 9.61
8556216
Trio to be acheived by assembly of individual compressors
Dimensions
H1
L1
H
L
L
H1
L1
H
12 AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Electrical data, connections and wiring
Danfoss scroll compressors DSF are available in motor voltage listed below.
Electrical power is connected to the compressor
terminals by Ø 4.8mm (3/16") screws. The
maximum tightening torque is 3Nm. Use a 1/4"
ring terminal on the power leads.
Cable gland or similar protection
component must be used on electrical box's
knockouts to against accidental contact with
electrical parts inside.
Motor voltage
Wiring connections
Motor voltage code Code 4
50 Hz Nominal voltage 400V-3ph
Voltage range : Nominal voltage ± 10%. The voltage range indicates where the compressor can run in the majority of
the application envelope. A boundary voltage supply which accumulates under specic conditions such as high ambiance, high
superheat, or map boundary conditions, may lead to a compressor trip.
Vavg = Mean voltage of phases 1, 2, 3.
V1-2 = Voltage between phases 1 and 2.
V1-3 = Voltage between phases 1 and 3.
V2-3 = Voltage between phases 2 and 3.
| Vavg - V1-2 | + | Vavg - V1-3 | + | Vavg - V2-3 |
2 x Vavg
% voltage
imbalance
= x 100
The maximum allowable voltage imbalance is
2%. Voltage imbalance causes high amperage
over one or several phases, which in turn leads to
overheating and possible motor damage. Voltage
imbalance is given by the formula:
DSF270-325-485-530 The terminal box is provided with 2 triple
knockouts and 1 single knockout for power
supply and 4 double knockouts for the safety
control circuit.
The 3 power supply knockouts accommodate the
following diameters:
• Ø 50.8mm (φ 2inch) (UL 1"1/2 conduit) &
Ø 43.7mm (φ 1.72inch) (UL 1"1/4 conduit) &
Ø 34.5mm (φ 1.36 inch) (UL 1" conduit)
• Ø 40.5mm (φ 1.59inch) (ISO40) &
Ø 32.2mm (φ 1.27inch) (ISO32) &
Ø 25.5 mm (φ 1 inch) (ISO25)
• Ø 25.5 mm (φ 1 inch) (ISO25)
The 4 others knockouts are as follows:
• Ø 22.5mm (φ 0.89inch) (PG16) (UL 1/2") &
Ø 16.5mm (φ 0.65inch) (ISO16) (x2)
• Ø 20.7mm (φ 0.81inch) (ISO20 or PG13.5) (x2)
Black Blue Brown
Faston 1/4" tabs
Power supply
Sump heater
Module
power supply
M1-M2
Control circuit
The motor protection modules come preinstalled
within the terminal box. Phase sequence
protection connections and thermistor
connections are pre-wired and should not be
removed. The module must be connected to a
power supply of the appropriate voltage. The
module terminals are 6.3mm (0.25inch) size
Faston type.
LNS1 S2 M1 M2
L1 L2 L3
Black Blue Brown
Phase sequence input
Internal control contact
Safety
circuit
Thermistor
connection
Module power
13AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Electrical data, connections and wiring
IP rating
The compressor terminal box according to IEC60529 is IP54 for all models when correctly sized IP54
rated cable glands are used.
First numeral, level of protection against contact and foreign objects
5 - Dust protected
Second numeral, level of protection against water
4 - Protection against water splashing
The temperature inside the terminal box
must not exceed 70°C (158°F). Consequently,
if the compressor is installed in an enclosure,
precautions must be taken to avoid that the
temperature around the compressor and
in the terminal box would rise too much.
A ventilation installation on the enclosure
panels may be necessary. If not, the electronic
protection module may not operate properly.
Any compressor damage related to this will not
be covered by Danfoss warranty. In the same
manner, cables must be selected in a way that
ensures the terminal box temperature does not
exceed 70°C (158°F).
Three phase electrical
characteristics
Terminal box temperature
Compressor model
LRA Max. operating current Winding resistance
A A Ω
Motor voltage code 4
DSF270 191 44 0.62
DSF325 231 54 0.52
DSF485 343 83 0.23
DSF530 343 92 0.23
Locked Rotor Amp value is the higher average
current as measured on mechanically blocked
compressors tested under nominal voltage. The
LRA value can be used as a rough estimation for
the starting current. However, in most cases, the
real starting current will be lower. A soft starter
can be applied to reduce starting current (see
section
“soft start“).
LRA (Locked Rotor Amp)
Winding resistance is the resistance between
phases at 25°C (77°F) (resistance value +/- 7%).
Winding resistance is generally low and it
requires adapted tools for precise measurement.
Use a digital ohm-meter, a “4 wires” method and
measure under stabilised ambient temperature.
Winding resistance varies strongly with winding
temperature. If the compressor is stabilised at a
dierent value than 25°C (77°F), the measured
resistance must be corrected using the following
formula:
a + t
amb
R
tamb
= R
25°C (77°F)
_______
a + t
25°C (77°F)
t
25°C
: reference temperature = 25°C (77°F)
t
amb
: temperature during measurement °C (°F)
R
25°C (77°F)
: winding resistance at 25°C (77°F)
R
amb
: winding resistance at tamb
Coecient a = 234.5
The MOC is the maximum amperage that the
compressor will draw staying in its application
envelope.
MOC can be used to select cables and contactors.
In normal operation, the compressor current
consumption is always less than the MOC value.
Winding resistance
MOC (Maximum Operating
Current)
14 AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Motor protection
Electrical data, connections and wiring
DSF compressors are delivered with a pre-
installed motor protection module inside the
terminal box. This device provides ecient and
reliable protection against overheating and
overloading as well as phase loss/reversal.
The motor protector comprises a control module
and PTC sensors embedded in the motor
winding.
The motor temperature is being constantly
measured by a PTC thermistor loop connected
on S1-S2 . If any thermistor exceeds its response
temperature, its resistance increases above the
trip level (4.500 Ω) and the output relay then
trips – i.e. contacts M1-M2 are open. After cooling
to below the response temperature (resistance <
2.750 Ω), a 5-minute time delay is activated.
After this delay has elapsed, the relay is once
again pulled in – i.e. contacts M1-M2 are closed.
The time delay may be cancelled by means
of resetting the mains (L-N -disconnect) for
approximately 5 sec.
A red/green twin LED is visible on the module.
A solid green LED denotes a fault free condition.
A blinking red LED indicates an identiable fault
condition:
While not compulsory, an additional thermal
magnetic motor circuit breaker is still advisable
for either alarm or manual reset.
Then it must be set below max operating current:
• When the motor temperature is too high,
then the internal PTC over temp. and module is
activated.
• When the current is too high the thermal
magnetic motor circuit breaker will trip before
the module activate therefore oering possibility
of manual reset.
DSF270 to DSF530
PTC overheat
Delay timer active (after PTC over temp.)
Appr. 1 second
40ms 40ms460ms 460ms
Appr. 1 second
920ms80ms
15AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Phase sequence and reverse
rotation protection
DSF270 to DSF530
Electrical data, connections and wiring
Use a phase meter to establish the phase
orders and connect line phases L1, L2 and L3 to
terminals T1, T2 and T3, respectively.
Use a phase meter to establish the phase
orders and connect line phases L1, L2 and L3 to
terminals T1, T2 and T3, respectively.
Compressor models DSF270 to 530 are delivered
with an electronic module which provides
protection against phase reversal and phase loss
at start-up.
The phase sequencing and phase loss monitoring
functions are active during a 5-sec window 1
second after compressor start-up (power on
L1-L2-L3).
Should one of these parameters be incorrect, the
relay would lock out (contact M1-M2 open). The
red LED on the module will show the following
blink code:
The lockout may be cancelled by resetting the
power mains (disconnect L-N) for approximately
5 seconds.
For more detailed information see “ Instructions
for electronic module” FRCC.PI.031.
Compressor
start
Phase monitoring
0 1 s 6 s
Phase sequence module logic
In case of phase reverse error:
In case of phase loss error:
Appro. 760 ms
120 ms120 ms120 ms 400ms
Appr. 1second
500ms 500ms
16 AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Approval and certicates
DSF scroll compressors comply with the following
approvals and certicates.
Certicates are listed on:
www.commercialcompressors.danfoss.com/
documentation/certicates/
Machines directive
2006/42/EC
Low voltage directive
Approval and certicates
2014/35/EU
CE 0038
(European Directive)
All DSF models
Products DSF models
Manufacturer’s declaration of incorporation Contact Danfoss
Products DSF models
Declaration of conformity Contact Danfoss
Pressure equipment
directive
Internal free volume
2014/68/EU
Products
Internal free volume without oil
Low pressure side High pressure side Total
litre cu.inch litre cu.inch litre cu.inch
DSF270 27. 5 1678 2.9 177 30.4 1855
DSF325 27.1 1654 2.8 171 29.9 1825
DSF485 28.5 1739 3.9 238 32.4 1977
DSF530 28.5 1739 3.9 238 32.4 1977
Products DSF270-325 DSF485-530
Category PED III IV
Maximum / Minimum temperature (Low side) - Ts
-35°C < Ts < 51°C
-31°F < Ts < 125.6°F
Maximum allowable pressure (Low side) - Ps
31.2bar(g)
452 psig
Maximum allowable pressure (High side) - Ps
48.7 bar (g)
706 psig
Declaration of conformity Contact Danfoss
17AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Design piping
General requirements Proper piping practices should be employed to:
1. Ensure adequate oil return, even under
minimum load conditions (refrigerant speed,
piping slopes…). For validation tests see section
“Manage oil in the circuit”.
2. Avoid condensed liquid refrigerant from
draining back to the compressor when stopped
(discharge piping upper loop). For validation
tests see section “Manage o cycle migration”.
General recommendations are described in the
gures below:
3. Piping should be designed with adequate
three-dimensional exibility to avoid excess
vibration. It should not be in contact with the
surrounding structure, unless a proper tubing
mount has been installed. For more information
on noise and vibration, see section on: “Sound
and vibration management”.
HP
4m/s (13 ft/s)
or more
0.5% slope
To condenser
max. 4m
(13ft)
max. 4m
(13ft)
0.5% slope
U-trap, as short as possible
4m/s (13ft/s)
or more
U trap, as short as possible
Evaporator
LP
8 to 12m/s
(26 to 40ft/s)
HP
LP
Condenser
3D exibility
Upper loop
SYSTEM DESIGN
18 AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Tandem and trio
requirements
Design piping
DSF tandem and trio use static oil balancing
principle to equalize oil level between the
compressors by gravity. This is ensured by a
precise suction and oil equalization piping
design.
The discharge line has no impact on oil
balancing. It is shown with tee, to indicate that
both left and right side discharge headers are
possible.
By default, DSF tandems and trios are not
factory-built.
To complete an assembly in the eld, you will
need:
- Tubings, according to specic outline drawings
indicated in the following table.
- Manifolding accessory kit.
- Compressors.
Suction and oil equalization piping
drawings must be respected (diameters,
minimum straight lengths, …)
R
Tandem model Composition Suction Discharge
Oil
equalization
Outline drawing
number
Suction
from
Washer inner
diameter
Washer in
suction of
Kit tandem code
no
DSF540E DSF270+DSF270 2"1/8 1" 5/8 1" 3/8 8556228
Left
Not needed - 7777041
Right
DSF595U DSF270+DSF325 2"1/8 1" 5/8 1" 3/8 8556228
Left
31 mm
(1.22 inch)
Cp1 7777037
Right
DSF650E DSF325+DSF325 2"5/8 1" 5/8 1" 5/8 8556228
Left
Not needed - 7777041
Right
DSF800U DSF270+DSF530 2"1/8 1" 5/8 1" 5/8 8556207
Left
24 mm
(0.94 inch)
Cp1 120Z0569
Right
DSF970E DSF485+DSF485 2"5/8 1" 5/8 1" 5/8 8556205
Left
Not needed - 120Z0578
Right
DSF855U DSF325+DSF530 2"5/8 1" 5/8 1" 5/8 8556220
Left
27 mm
(1.06 inch)
Cp1 120Z0551
Right
DSF1060E DSF530+DSF530 2"5/8 1" 5/8 1" 5/8 8556205
Left
Not needed - 120Z0578
Right
Trio model Composition Suction Discharge
Oil
equalization
Outline drawing
number
Suction
from
Washer inner
diameter
Washer in
suction of
Kit tandem
code no
DSF810T DSF270+DSF270 +DSF270 2"5/8 1" 5/8 1" 5/8 8556217
Left 30 mm(1.18 inch) Cp3 120Z0673
Right 34.5 mm(1.36 inch) Cp1 & Cp3 7777039
DSF975T DSF325+DSF325 +DSF325 2"5/8 1" 5/8 1" 5/8 8556217
Left 30 mm(1.18 inch) Cp3 120Z0673
Right 34.5 mm(1.36 inch) Cp1 & Cp3 7777039
DSF1590T DSF530+DSF530 +DSF530 3"1/8 2" 1/8 1" 5/8 8556216
Left
33 mm(1.3 inch) Cp2 & Cp3 7777040
Right
19AB309735209512en-000101
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Suction washer position Depending on manifold conguration, it is
essential to equalize the pressure of compressor
sumps. Hence, a suction washer must be added
on certain compressors according to the table.
Suction washers are included in tandem or trio
accessory kits as described in the illustrations.
By convention, the compressors order (N°1, N°2,
N°3) is dened counting from left to right, placed
on the side facing the electrical boxes of the
compressors (see example below on a trio)
R
Included in tandem or trio accessory kit
Not supplied
Design piping
Compressor 3
(Cp3)
Right suction
Left suction
Compressor 2
(Cp2)
Compressor 1
(Cp1)
On trio models
Compressor 3
(Cp3)
Compressor 2
(Cp2)
Compressor 1
(Cp1)
The oil level is balanced by a pipe of 1"3/8
or 1"5/8. To connect the equalization line on
rotolock connections, the adaptor sleeves
included in the tandem or trio accessory kit must
be used.
Tightening torque 145Nm
Included in tandem kit
20 AB309735209512en-000101
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
  • Page 1 1
  • Page 2 2
  • Page 3 3
  • Page 4 4
  • Page 5 5
  • Page 6 6
  • Page 7 7
  • Page 8 8
  • Page 9 9
  • Page 10 10
  • Page 11 11
  • Page 12 12
  • Page 13 13
  • Page 14 14
  • Page 15 15
  • Page 16 16
  • Page 17 17
  • Page 18 18
  • Page 19 19
  • Page 20 20
  • Page 21 21
  • Page 22 22
  • Page 23 23
  • Page 24 24
  • Page 25 25
  • Page 26 26
  • Page 27 27
  • Page 28 28
  • Page 29 29
  • Page 30 30
  • Page 31 31
  • Page 32 32
  • Page 33 33
  • Page 34 34
  • Page 35 35
  • Page 36 36
  • Page 37 37
  • Page 38 38
  • Page 39 39
  • Page 40 40
  • Page 41 41
  • Page 42 42
  • Page 43 43
  • Page 44 44
  • Page 45 45
  • Page 46 46
  • Page 47 47
  • Page 48 48
  • Page 49 49
  • Page 50 50

Danfoss 120H1446 User guide

120H1446
Danfoss
Brand
Danfoss
Model
120H1446
Type
User guide
Download PDF
report

Ask a question and I''ll find the answer in the document

Finding information in a document is now easier with AI

Related papers

Other documents