Danfoss Optyma OP-SMLZ Series User manual

The condensing unit must only be used for
its designed purpose(s) and within its scope of
application.
Under all circumstances, the EN378 (or
other applicable local safety regulation)
requirements must be fullled.
The condensing unit is delivered under nitro-
gen gas pressure (1 bar) and hence it cannot
be connected as it is; refer to the «installation»
section for further details.
The condensing unit must be handled with cau-
tion in the vertical position (maximum oset
from the vertical : 15°)
FRCC.EI.026.A2.02 © Danfoss Commercial Compressors 11/12
1
MADE IN INDIA
OP-SMLZ015ME
Code no.:
Application
Refrigerant
M.W.P. HP
114X70..
MBP
(1) R404A, R507A
(1) 28 bar
LP (1) 7 bar
IP54
(2) R134a
(2) 23 bar
(2) 5 bar
Voltage 380V - 400 ~ 3 50Hz
LRA 51 20MCC
Serial No.
Barcode Serial No:
123456BS0310
118UXXXX
A
B
C
D
E
F
G
K
H
I
J
INSTRUCTIONS
OPTYMA™ SLIM PACK OP-SMLZ
Installation and servicing of the
condensing units by qualified
personnel only. Follow these instructions
and sound refrigeration engineering practice
relating to installation, commissioning,
maintenance and service.
A: Model
B: Code number
C: Application, Protection
D: Refrigerant
E: Housing Service Pressure
F: Supply voltage, Locked Rotor Ampere,
Maximum Current Consumption
G: Serial Number and bar code
H: Cable entry ports
I: Suction port
J: Liquid port
K: Microchannel heat exchanger
L
M
NO
L
[mm]
M
[mm]
N
[mm]
O
[mm]
250 650 550 550
Picture 1 : Minimum mounting distances
Picture 2
Picture 3
Mounting bolts (not supplied)
1 – Introduction
These instructions pertain to Optyma conden-
sing units OP-SMLZ (R507A, R404A, R134a, R22)
used for refrigeration systems. They provide ne-
cessary information regarding safety and proper
usage of this product
The condensing unit includes following:
• Scroll compressor
• Microchannel heat exchanger
• Dual pressure switches
• Service valves Suction/ liquid
• Fan and compressor capacitors
• Weather proof housing
• Filter drier
• Cranckcase heater for compressor
• Receiver with stop valve
• Sight glass
2 – Handling and storage
• It is recommended not to open the packaging
before the unit is at the nal place for installation.
• Handle the unit with care. The packaging al-
lows for the use of a forklift or pallet jack. Use
appropriate and safe lifting equipment.
• Store and transport the unit in an upright position.
• Store the unit between -35°C and 50°C.
• Don’t expose the packaging to rain or corro-
sive atmosphere.
• After unpacking, check that the unit is com-
plete and undamaged.
3 – Installation precautions
Do not braze as long the condensing unit is
under pressure.
Never place the unit in a ammable atmosphere
Place the unit in such a way that it is not blocking
or hindering walking areas, doors, windows or similar.
• Ensure adequate space around the unit for air
circulation and to open doors. Refer to pic-
ture1 for minimal values of distance to walls.
• Avoid installing the unit in locations which are dai-
ly exposed to direct sunshine for longer periods.
• Avoid installing the unit in aggressive and
dusty environments.
• Ensure a foundation with horizontal surface
(less than 3° slope), strong and stable enough
to carry the entire unit weight and to elimi-
nate vibrations and interference.
• The unit ambient temperature may not ex-
ceed 50°C during o-cycle.
• Ensure that the power supply corresponds to
the unit characteristics (see nameplate).
• When installing units for HFC refrigerants,
use equipment specically 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 suction piping connected to the com-
pressor must be exible in 3 dimensions to
dampen vibrations. Furthermore piping has
to be done in such a way that oil return for the
compressor is ensured and the risk of liquid
slug over in compressor is eliminated.
4 – Installation
• The installation in which the condensing unit
is installed must comply to EEC Pressure direc-
tive (PED) no. 97/23/EC. The condensing unit
itself is not a ”unit” in the scope this directive.
• The unit must be securely installed on a stable
and rigid support, and xed from the begin-
ning. See picture 2.
• It is recommended to install the unit on rub-
ber grommets or vibration dampers (not
supplied).
• Slowly release the nitrogen holding charge
through the schrader port.
• Connect the unit to the system as soon as pos-
sible 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 ow.
• Connect the required safety and control de-
vices. When the schrader port is used for this,
remove the internal valve.
• It is recommended to insulate the suction
pipe up to the compressor inlet with 19 mm
thick insulation.

2FRCC.EI.026.A2.02 © Danfoss Commercial Compressors 11/12
Instructions
5 – Leak detection
Never pressurize the circuit with oxygen or
dry air. This could cause re or explosion.
• Do not use dye for leak detection.
• Perform a leak detection test on the complete
system.
• The maximum test pressure is 32 bar.
• 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 o and isolate the main power supply.
• Ensure that power supply can not be switched
on during installation.
• All electrical components must be selected as
per local standards and unit requirements.
• Refer to wiring diagram for electrical connec-
tions details.
• Ensure that the power supply corresponds to
the unit characteristics and that the power
supply is stable (nominal voltage ±10% and
nominal frequency ±2,5 Hz).
• Dimension the power supply cables accor-
ding to unit data for voltage and current.
• Protect the power supply and ensure correct
earthing.
• Make the power supply according to local
standards and legal requirements.
• The unit is equipped with high and low pres-
sure switches, which directly cut the power
supply to the compressor in case of activation.
Parameters for high and low pressure cut outs
should be set by installer considering com-
pressor model, refrigerant and application.
For units with a 3-phase scroll compressor, cor-
rect phase sequence for compressor rotation
direction shall be observed.
• Determine the phase sequence by using a
phase meter in order to establish the phase
orders of line phases L1, L2 and L3.
• Connect line phases L1, L2 and L3 to main
switch terminals T1, T2 and T3 respectively.
8 – Filling the system
• Wear protective stu like goggles and protec-
tive gloves.
• Never start the compressor under vacuum.
Keep the compressor switched o.
• Before charging the refrigerant, verify that the
oil level is between ¼ and ¾ on the compressor
oil sight glass. If additional oil is required please
refer to the compressors label for type of oil.
• Use only the refrigerant for which the unit is
designed for.
• Fill the refrigerant in liquid phase into the
condenser or liquid receiver. Ensure a slow
charging of the system to 4 – 5 bar for R404A /
R507A or R22 and approx. 2 bar for R134a.
• Do not put liquid refrigerant through suction line.
• It is not allowed to mix additives with the oil
and/or refrigerant
• The remaining charge is done until the instal-
lation has reached a level of stable nominal
condition during operation.
• Never leave the lling cylinder connected to
the circuit.
9 – Verification before commissioning
Use safety devices such as safety pressure
switch and mechanical relief valve in com-
pliance with both generally and locally appli-
cable regulations and safety standards. Ensure
that they are operational and properly set.
Check that the settings of high-pressure
switches and relief valves don’t exceed the maxi-
mum service pressure of any system component.
• Verify that all electrical connections are properly
fastened and in compliance with local regulations.
• When a crankcase heater is required, it must
be energized at least 12 hours before initial
start-up and start-up after prolonged shut-
down or belt type crankcase heaters.
10 – Start-up
• Never start the unit when no refrigerant is
charged.
• All service valves must be in the open position.
See picture 3.
• Check compliance between unit and power
supply.
• Check that the crankcase heater is working.
• Check that the fan can rotate freely.
• Check that the protection sheet has been re-
moved from the backside of condenser.
• Balance the HP/LP pressure.
• Energize the unit. It must start promptly. If
the compressor does not start, check wiring
conformity, voltage on terminals and se-
quence phase.
• Eventual reverse rotation of a 3-phase com-
pressor can be detected by following phe-
nomena; unit doesn’t start, the compressor
doesn’t build up pressure, it has abnormally
high sound level and abnormally low power
consumption. In such case, shut down the
unit immediately and connect the phases to
their proper terminals.
• If the rotation direction is correct the low pres-
sure indication on the low pressure gauge
shall show a declining pressure and the high
pressure indication on the high pressure
gauge shall show an increasing pressure.
11 – Check with running unit
• Check the fan rotation direction. Air must ow
from the condenser towards the fan.
• Check current draw and voltage.
• Check suction superheat to reduce risk of
slugging.
• When a sight glass is provided observe the oil
level at start and during operation to conrm
that the oil level remains visible.
• Respect the operating limits.
• Check all tubes for abnormal vibration. Move-
ments in excess of 1.5 mm require corrective
measures such as tube brackets.
• When needed, additional refrigerant in liquid
phase may be added in the low-pressure side as
far away as possible from the compressor. The
compressor must be operating during this pro-
cess.
• Do not overcharge the system.
• Never release refrigerant to atmosphere.
• Before leaving the installation site, carry out
a general installation inspection regarding
cleanliness, noise and leak detection.
• Record type and amount of refrigerant charge
as well as operating conditions as a reference
for future inspections.
12 – Maintenance
Always switch o the unit at main switch be-
fore remove fan panel.
Internal pressure and surface temperature
are dangerous and may cause permanent injury.
Maintenance operators and installers require
appropriate skills and tools. Tubing temperature
may exceed 100°C and can cause severe burns.
Ensure that periodic service inspections to
ensure system reliability and as required by local
regulations are performed.
To prevent system related problems, following
Periodic maintenance is recommended:
• Verify that safety devices are operational and
properly set.
• Ensure that the system is leak tight.
• Check the compressor current draw.
• Conrm that the system is operating in a way
consistent with previous maintenance re-
cords and ambient conditions.
• Check that all electrical connections are still
adequately fastened.
• Keep the unit clean and verify the absence of
rust and oxidation on the unit components,
tubes and electrical connections.
The condenser must be checked at least once
a year for clogging and be cleaned if deemed
necessary. Access to the internal side of the
condenser takes place through the fan panel.
Microchannel coils tend to accumulate dirt on
the surface rather than inside, which makes
them easier to clean than n-&-tube coils.
• Switch o the unit at main switch before re-
move any panel from the condensing unit.
• Remove surface dirt, leaves, bres, etc. with
a vacuum cleaner, equipped with a brush or
other soft attachment. Alternatively, blow
compressed air through the coil from the in-
side out, and brush with a soft bristle. Do not
use a wire brush. Do not impact or scrape the
coil with the vacuum tube or air nozzle.
If the refrigerant system has been opened, the
system has to be ushed with dry air or nitrogen
to remove moisture and a new lter drier has to
be installed. If evacuation of refrigerant has to
be done, it shall be done in such a way that no
refrigerant can escape to the environment.
13 - Warranty
Always transmit the model number and serial num-
ber with any claim led regarding this product.
The product warranty may be void in following
cases:
• Absence of nameplate.
• External modications; in particular, drilling,
welding, broken feet and shock marks.
• Compressor opened or returned unsealed.
• Rust, water or leak detection dye inside the
compressor.
• Use of a refrigerant or lubricant not approved
by Danfoss.
• Any deviation from recommended instruc-
tions pertaining to installation, application or
maintenance.
• Use in mobile applications.
• Use in explosive atmospheric environment.
• No model number or serial number transmit-
ted with the warranty claim.
14 – Disposal
Danfoss recommends that condensing
units and oil should be recycled by a
suitable company at its site.

3
FRCC.EI.026.A2.02 © Danfoss Commercial Compressors 11/12
Instructions
OP-SMLZ015 - 026
OP-SMLZ030 - 048

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This
also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specications already agreed. All trade-
marks in this material are property of the respective companies. Performer®, Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
FRCC.EI.026.A2.02 - November 2012 Copyright Danfoss Commercial Compressors - DSS - 11/12
Instructions
BK
24 3
BU
BN
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BN BN
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A2
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PE
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MG73BF
SM500
16 18 15
L1
L2
L3
P
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26 28 25
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21
22
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1
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230V1N~/50Hz
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OP-SMLZ030MG
OP-SMLZ038MG
OP-SMLZ015MG
OP-SMLZ021MG
OP-SMLZ026MG
OP-SMLZ030MG
OP-SMLZ038MG
19A
25A
26A
32A
38A
BK
24 3
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OP-SMLZ015ME
OP-SMLZ021ME
OP-SMLZ026ME
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7,0A
9,5A
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380-400V3N~/50Hz
L1 L2 PEL3 N
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OP-SMLZ048ME 16A
OP-SMLZ045ME 15A
Code G : OP-SMLZ015 - 021 - 026 - 030 - 038
Code E : OP-SMLZ015 - 021 - 026 - 030 - 038 - 045 - 048
Legend/Legende/légende
BK black/schwarz/noir
BU blue/blau/bleu
BN brown/braun/marron
GY grey/grey/gris
RD red/rot/rouge
WH white/weiss/blanc
Legend
A1 Voltage relay
B1* Fan speed controller (option)
B2 High and Low pressure switch
E1 Crankcase heater
M1 Compressor
M2 Fan motor
S1* Room thermostat (option)