Danfoss DSH Serie Instructions page 5

Instructions
5 – Handling and storage
• Handle the compressor with care. Use the
dedicated handles in the packaging. Use the
compressor lifting lug and use appropriate
and safe lifting equipment.
• Store and transport the compressor in an
upright position.
• Store the compressor between Ts min and Ts
max values for LP side indicated on compres-
sor nameplate.
• Don't expose the compressor and the packa-
ging to rain or corrosive atmosphere.
6 – Safety measures before assembly
Never use the compressor in a ammable
atmosphere.
• Check before assembly that the compressor
does not show any obvious signs of deterio-
ration that could have occurred during inap-
propriate transportation, handling or storage.
• The compressor ambient temperature may
not exceed Ts max value for LP side indicated
on compressor nameplate during o -cycle.
• Mount the compressor on a horizontal at
surface with less than 3° slope.
• Verify that the power supply corresponds to
the compressor motor characteristics (see
nameplate).
• When installing DSH, SH, WSH or SZ, use
equipment speci cally reserved for HFC re-
frigerants which was never used for CFC or
HCFC refrigerants.
• Use clean and dehydrated refrigeration-grade
copper tubes and silver alloy brazing material.
• Use clean and dehydrated system components.
• The piping connected to the compressor must
be exible in 3 dimensions to dampen vibrations.
7 – Assembly
• The compressor must be mounted on rails or
chassis according to Danfoss recommenda-
tions described in related product guidelines
(type of spacer, tightening torques).
• Slowly release the nitrogen holding charge
through the schrader port.
• Remove the gaskets when brazing rotolock
connectors.
• Always use new gaskets for assembly.
• Connect the compressor to the system as
soon as possible to avoid oil contamination
from ambient moisture.
FRCC.PI.003.B3.02 - 8510197P05E
• Avoid material entering into the system while
cutting tubes. Never drill holes where burrs
cannot be removed.
• Braze with great care using state-of-the-art
technique and vent piping with nitrogen gas
ow.
• Connect the required safety and control de-
vices. When the schrader port is used for this,
remove the internal valve.
• Do not exceed the maximum tightening
torque for rotolock connections:
Rotolock connections Tightening torque
1" rotolock 80 Nm
1 1/4 " rotolock 90 Nm
1 3/4" rotolock 110 Nm
2 1/4" rotolock 130 Nm.
8 – Leak detection
Never pressurize the circuit with oxygen or
dry air. This could cause re or explosion.
• SM 084 to 185, SY 380, SZ 084 to 185, SZ 380,
DSH / SH / WSH 090 to 184: Pressurize the
system on HP side rst and then on LP side.
Never let the pressure on LP side exceed the
pressure on HP side with more than 5 bar.
Such pressure di erence could cause internal
compressor damage.
• Do not use dye for leak detection.
• Perform a leak detection test on the complete
system.
• The test pressure must not exceed 1.1 x PS
value for LP side and PS value for HP side indi-
cated on compressor nameplate.
• When a leak is discovered, repair the leak and
repeat the leak detection.
9 – Vacuum dehydration
• Never use the compressor to evacuate the
system.
• Connect a vacuum pump to both the LP & HP
sides.
• Pull down the system under a vacuum of 500
µm Hg (0.67 mbar) absolute.
• Do not use a megohmmeter nor apply power
to the compressor while it is under vacuum as
this may cause internal damage.
10 – Electrical connections
• Switch o and isolate the main power supply.
See overleaf for wiring details.
• All electrical components must be selected as
per local standards and compressor require-
ments.
• Refer to section 4 for electrical connections
details.
• The Danfoss scroll compressors only works
correctly in one rotation direction. Line
phases L1, L2, L3 must absolutely be connec-
ted to compressor terminals T1, T2, T3 to
avoid reverse rotation.
• Use ø 4.8 mm (3/16") screws and ¼" ring ter-
minals for the power connection. Fasten with
3 Nm torque.
• The thermostat connection (if present) is a ¼"
AMP-AWE spade connector.
• The compressor must be connected to earth
with the 5 mm earth terminal screw.
11 – Filling the system
• Keep the compressor switched o .
• Fill the refrigerant in liquid phase into the
condenser or liquid receiver. The charge
must be as close as possible to the nominal
system charge to avoid low pressure opera-
tion and excessive superheat. Never let the
pressure on LP side exceed the pressure on
HP side with more than 5 bar. Such pressure
di erence could cause internal compressor
damage.
• Keep the refrigerant charge below the in-
dicated charge limits if possible. Above this
limit; protect the compressor against liquid
ood-back with a pump-down cycle or suc-
tion line accumulator.
• Never leave the lling cylinder connected to
the circuit.
Compressor models Refrigerant charge
SM/SZ 084, 090, 100
SM/SZ 110, 120
SM 112, 124, 147 , SZ147
SM/SZ 115, 125
SM/SZ 148, 160, 161
SM/SZ 175, 185
SY/SZ 240
SY/SZ 380
DSH / SH / WSH 090
DSH / SH / WSH105, 120,
140, 161, 184
SH 180, 240, 295, 300
DSH240, 295
SH 380
SH 485, DSH 381, DSH 485
© Danfoss | DCS (CC) | 2017.09 | 5
limit (kg)
8.5
10
7.9
11
12.5
13.5
16
20
5.9
7.9
13.5
15
14.5
17