FRCC.EI.003.A1.02 © Danfoss Commercial Compressors 03/08
3
A1
A3
A2
MPM
12 14
11
N
2
1
L1
S
sh 180
This Performer® compressor motor
is protected by an external module
protecting against overheating and
high current draw.
Control circuit ..........................................................CC
Control device ..........................................................TH
Optional short cycle timer (3 min) .................180 s
Control relay ............................................................KA
Liquid Line Solenoid valve ................................ LLSV
Compressor contactor ..........................................KM
Safety lock out relay ................................................KS
Pump-down control & L.P. switch ....................... BP
H.P. safety switch ....................................................HP
Fused disconnect ....................................................Q1
Fuses ...........................................................................F1
External overload protection ................................F2
Compressor motor ...................................................M
Motor safety thermostat .................................... thM
Discharge gas thermostat .................................DGT
Motor Protection Module ................................ MPM
Thermistor chain........................................................S
Legend:
All Wiring diagrams are with pump-down cycle
Instructions
1 – Introduction
These instructions pertain to the Performer®
SM, SY, SZ & SH scroll compressors used for air-
conditioning systems. They provide necessary
information regarding safety and proper usage
of this product.
2 – 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 -35°C and 50°C.
• Don’t expose the compressor and the packa
-
ging to rain or corrosive atmosphere.
3 – Safety measures before assembly
Never use the compressor in a flammable
atmosphere.
• The compressor ambient temperature may
not exceed 50°C during off-cycle.
• Mount the compressor on a horizontal flat
surface with less than 3° slope.
• Verify that the power supply corresponds to
the compressor motor characteristics (see
nameplate).
• When installing SZ or SH, use equipment spe
-
cifically reserved for HFC refrigerants 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
flexible in 3 dimensions to dampen vibrations.
4 – Assembly
• In parallel assemblies of SH, SM124 and SM147
the compressor requires a rigid mounting on
the rails. Use the rigid spacers from the tandem
mounting kit or the rigid spacers delivered
with dedicated tandem compressors.
• 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.
• 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 tech
-
nique and vent piping with nitrogen gas flow.
• 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.
5 – Leak detection
Never pressurize the circuit with oxygen or
dry air. This could cause fire or explosion.
• SM 084 to 185, SY 380, SZ 084 to 185, SZ 380, SH
090 to 180: Pressurize the system on HP side
first and then on LP side. Never let the pres-
sure on LP side exceed the pressure on HP side
with more than 5 bar. Such pressure difference
could cause internal compressor damage.
• SY 240 & 300, SZ 240 & 300, SH 240 to 380:
Pressurize the system slowly on LP side. The
pressure increase from 0 up to the maximum
system test pressure at LP side shall take at
least 2 minutes. When the 2 minutes time span
is not respected, the pressure on LP side could
exceed the pressure on HP side with more than
5 bar and cause internal compressor damage.
• Do not use dye for leak detection.
• Perform a leak detection test on the complete
system.
• The low side test pressure must not exceed 20
bar for SM/SY/SZ and 30 bar for SH compressors.
• When a leak is discovered, repair the leak and
repeat the leak detection.
6 – 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.
7 – Electrical connections
• Switch off and isolate the main power supply.
See overleaf for wiring details.
• All electrical components must be selected as per
local standards and compressor requirements.
• Refer to page 2 for electrical connections details.
• The Performer® scroll compressor only works
correctly in one rotation direction. Line pha-
ses L1, L2, L3 must absolutely be connected
