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Instructions
1 – Introduction
These
instructions
pertain
ma
Plus
condensing
units
™
OP-MPXM, OP-MPGM, OP-LPQM, OP-LPOM & OP-
MPBM used for refrigeration systems. They pro-
vide necessary information regarding safety and
proper usage of this product.
The condensing unit includes following:
• Microchannel heat exchanger
• Reciprocating or scroll compressor
• Receiver with stop valve
• Ball valves
• Sight glass
• High & low pressure switches
• Replaceable filter drier
• Electronic controller
• Main circuit breaker (Main switch with overload
protection)
• Fan and compressor capacitors
• Compressor contactor
• Robust weather proof housing
• Liquid injection controller (Module B Plus)*
• Electronic expansion valve (ETS6)*
*Only for P02 version
2 – Handling and storage
• It is recommended not to open the packaging
before the unit is at the final place for installa-
tion.
• 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 posi-
tion.
• Store the unit between -35°C and 50°C.
• Don't expose the packaging to rain or corrosive
atmosphere.
• After unpacking, check that the unit is com-
plete and undamaged.
3 – Installation precautions
Never place the unit in a flammable atmos-
phere.
Place the unit in such a way that it is not bloc-
king or hindering walking areas, doors, windows
or similar.
• Ensure adequate space around the unit for air
circulation and to open doors. Refer to picture
1 for minimal values of distance to walls.
• Avoid installing the unit in locations which are
daily exposed to direct sunshine for longer pe-
riods.
• Avoid installing the unit in aggressive and dus-
ty environments.
• Ensure a foundation with horizontal surface
(less than 3° slope), strong and stable enough
to carry the entire unit weight and to eliminate
vibrations and interference.
• The unit ambient temperature may not exceed
50°C during off-cycle.
© Danfoss | DCS (CC) | 2019.07
• Ensure that the power supply corresponds to
to
Opty-
the unit characteristics (see nameplate).
OP-MPYM,
• When installing units for HFC refrigerants, use
equipment specifically reserved for HFC refri-
gerants 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 compres-
sor must be flexible in 3 dimensions to dampen
vibrations. Furthermore piping has to be done
in such a way that oil return for the compres-
sor 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 pressure Equipment
Directive (PED) 2014/68/EU. The condensing unit
itself is not a "unit" in the scope this directive.
• It is recommended to install the unit on rubber
grommets or vibration dampers (not supplied).
• It is possible to stack units on top of each other.
Unit
Housing 1
(Code no. 114X31-- or 114X41--)
Housing 2
(Code no. 114X32-- or 114X42--)
Housing 3
(Code no. 114X33-- or 114X43--)
Housing 4
(Code no. 114X34-- or 114X44--)
• When stacking, the topmost unit must be secu-
red to the wall, as shown in picture 2.
• 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
technique 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.
• It is recommended to insulate the suction pipe
up to the compressor inlet with 19 mm thick
insulation.
5 – Leak detection
Never pressurize the circuit with oxygen or dry
air. This could cause fire or explosion.
• Do not use dye for leak detection.
• Perform a leak detection test on the complete
system.
• The maximum test pressure is 31*
• When a leak is discovered, repair the leak and
repeat the leak detection.
*
25 bar for OP-.......AJ.... & OP-.......FH.... models
)
6 – Vacuum dehydration
• Never use the compressor to evacuate the sys-
tem.
• 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.
• 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 sup-
ply is stable (nominal voltage ±10% and nomi-
Maximum
stacking
nal frequency ±2,5 Hz).
• Dimension the power supply cables according
3
to unit data for voltage and current.
2
• Protect the power supply and ensure correct
earthing.
2
• Make the power supply according to local stan-
dards and legal requirements.
2
• The unit is equipped with an electronic control-
ler. Refer to Manual RS8GDxxx for details.
• P02 version models (OP-xxxxxxxxxP02E) are
equipped with Electronic circuit board (Module
B Plus). Refer to section " Module B Plus User
Guide " of this manual.
• The unit is equipped with a main switch with
overload protection. The overload protection is
factory preset but it is recommended to check
the value before taking the unit in operation.
The value for the overload protection can be
found in the wiring diagram in the front door of
the unit.
• 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
are preset in the controller, adapted to the com-
pressor installed in the unit.
For units with a 3-phase scroll compressor (OP-
MPXMxxxxxxxxE), correct 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 swit-
ch terminals T1, T2 and T3 respectively.
bar.
)
AN18658643414603-001001 | 3
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