Danfoss SM series Instruktion Seite 5

Instructions
SH 240 - 300 - 380
SY 240 - 300 - 380
SZ 240 - 300 - 380
These Performer® compressors motors are protected by an external
module protecting against phase loss/reversal, over h eating and high
current draw.
Legend:
Fuses...........................................................................................F1
Compressor.contactor. . ........................................................KM
Control.relay............................................................................KA
Safety.lock.out.relay. . ............................................................. KS
Optional.short.cycle.timer.(3.min).. . .............................. 180.s
External.overload.protection. . ..............................................F2
Pump-down.pressure.switch................................................LP
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
• H andle the compressor with care. Use the
dedicated handles in the packaging. Use the
compressor lifting lug and use appropriate
and safe lifting equipment.
• S tore and transport the compressor in an
upright position.
• S tore the compressor between -35°C and 50°C.
• D on'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.
• T he compressor ambient temperature may
not exceed 50°C during off-cycle.
• M ount the compressor on a horizontal flat
surface with less than 3° slope.
• V erify that the power supply corresponds to
the compressor motor characteristics (see
nameplate).
• W hen installing SZ or SH, use equipment spe-
cifically reserved for HFC refrigerants which
was never used for CFC or HCFC refrigerants.
• U se clean and dehydrated refrigeration-grade
copper tubes and silver alloy brazing material.
• U se clean and dehydrated system components.
• T he piping connected to the compressor must be
flexible in 3 dimensions to dampen vibrations.
}
High.pressure.safety.switch.................................................HP
Control.device. . ........................................................................TH
Liquid.Line.Solenoid.valve. . .............................................. LLSV
Discharge.gas.thermostat. . ...............................................DGT
Fused.disconnect....................................................................Q1
Motor.safety.thermostat. . .................................................. thM
Compressor.motor.................................................................. M
4 – Assembly
• I n parallel assemblies of SH, SM112 - 124 -
SM147 the compressor requires a rigid moun-
ting on the rails. Use the rigid spacers from the
tandem mounting kit or the rigid spacers deli-
vered with dedicated tandem compressors.
• S lowly release the nitrogen holding charge
through the schrader port.
• R emove the gaskets when brazing rotolock
connectors.
• A lways use new gaskets for assembly.
• C onnect the compressor to the system as
soon as possible to avoid oil contamination
from ambient moisture.
• A void material entering into the system while
cutting tubes. Never drill holes where burrs
cannot be removed.
• B raze with great care using state-of-the-art tech-
nique and vent piping with nitrogen gas flow.
• C onnect the required safety and control de-
vices. When the schrader port is used for this,
remove the internal valve.
• D o 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.
• S M 084 to 185, SY 380, SZ 084 to 185, SZ 380,
SH 090 to 184: Pressurize the system on HP side
first 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 difference could
FRCC.EI.003.A2.02 © Danfoss Commercial Compressors 07/10
CC
A1
LPS
A3
A2
KS
Motor.Protection.Module................................................ MPM
Thermistor.chain.......................................................................S
Safety.pressure.switch. . ....................................................... LPS
Control.circuit..........................................................................CC
All Wiring diagrams are with pump-down cycle
cause internal compressor damage.
• D o not use dye for leak detection.
• P erform a leak detection test on the complete
system.
• T he test pressure must not exceed :
Models
SY / SZ 240 - 380
SM / SZ 84 - 185
SH 180 - 380
SH 090 - 184
• W hen a leak is discovered, repair the leak and
repeat the leak detection.
6 – Vacuum dehydration
• N ever use the compressor to evacuate the
system.
• C onnect a vacuum pump to both the LP & HP
sides.
• P ull down the system under a vacuum of 500
µm Hg (0.67 mbar) absolute.
• D o not use a megohmmeter nor apply power
to the compressor while it is under vacuum as
this may cause internal damage.
7 – Electrical connections
• S witch off and isolate the main power supply.
See overleaf for wiring details.
• A ll electrical components must be selected as per
local standards and compressor requirements.
• R efer to page 2 for electrical connections details.
• T he Performer® scroll compressor only works
correctly in one rotation direction. Line pha-
ses L1, L2, L3 must absolutely be connected
to compressor terminals T1, T2, T3 to avoid
reverse rotation.
• U se ø 4.8 mm (3/16") screws and ¼" ring ter-
minals for the power connection. Fasten with
3 Nm torque.
MPM
S
LP side HP side
20 bar 32 bar
25 bar 32 bar
30 bar 45 bar
33 bar 45 bar
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