Installation - Danfoss HJM022D20Q Manual

Manual
Introduction
Handling and storage
Installation precautions

Installation

Leak detection
Vacuum dehydration
4
FRCC.ES.013.A1.02
Installation & Maintenance
These instructions pertain to OPTYMA™
condensing units (R507A, R404A, R134a and
R22) used for refrigeration systems. They provide
• It is recommended not to open the packaging
before the unit is at the final place for installation.
• Handle the unit with care. The packaging allows
the use of a forklift or pallet jack for handling. Use
appropriate and safe lifting equipment.
• Store and transport the unit in an upright
position.
Do not braze if the condensing unit is under
pressure.
Never place the unit in a flammable
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 picture 1
for minimal values of distance to walls.
• Avoid installing the unit in locations which are
daily exposed to direct sunshine for longer
periods.
• Avoid installing the unit in aggressive and/or
dusty 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 must be securely installed on a stable
and rigid support, and fix from the beginning.
• It is recommended to install the unit on rubber
grommets or vibration dampers (not supplied).
• Slowly release the nitrogen holding charge
through the Schraeder port.
• Connect the unit 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.
Never pressurize the circuit with oxygen or dry
air. This could cause fire or explosions.
• Do not use dye for leak detection.
• Perform a leak detection test on the complete
system.
• Never use the compressor to evacuate the
system.
• Connect a vacuum pump to both the LP and HP
sides.
necessary information regarding safety and proper
usage of this product.
• 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 complete
and undamaged.
• The unit ambient temperature may not exceed
50 °C during off-cycle.
• Ensure that the power supply corresponds to the
unit characteristics (see nameplate).
• When installing units for HFC refrigerants,
use equipment specifically 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 compressor
must be flexible 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.
• Braze with great care using state-of-the-art
techniques and vent piping with nitrogen gas
flow.
• Connect the required safety and control devices.
Remove the internal valve when using the
Schraeder port for this.
• It is recommended to insulate the suction pipe
up to the compressor inlet with 19 mm thick
insulation.
• The maximum test pressure is 32 bar.
• When a leak is discovered, repair the leak and
repeat the leak detection test.
• Pull down the system under a vacuum of 500 µm
Hg (0.67 mbar) absolute.
• Do not use an ohmmeter nor apply power to the
compressor while it is under vacuum as this may
cause internal damage.