Danfoss BW10 020-090, Инструкции по установке, эксплуатации и обслуживанию

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12 - MAJOR SYSTEM COMPONENTS AND OPERATION
DATA
12.1 - Compressors
BW10 units use hermetic scroll compressors. The only
refrigerant permitted for these compressors is R-410A.
The compressors are not certified for mobile applications or use
in explosive environments.
For more information contact the Danfoss service team for
maintenance instructions.
IMPORTANT: All compressor and system pressure tests must
be carried out by qualified personnel, taking the greatest care
with potential dangers resulting from the pressures used, and
respecting the maximum operating pressure limit on the high
and low-pressure side, shown on the unit and compressor
name plates.
• Maximum operating pressure, low-pressure side: 2820
kPa (28.2 bar)
• Maximum operating pressure, high-pressure side: 4870
kPa (48.7 bar).
Any modification or alteration such as soldering on the
compressor shell may invalidate the right to use the equip-ment.
Units using these compressors are installed in areas where the
temperature must be between 5°C minimum and 40°C
maximum. The temperature around the compressors must not
exceed 50°C during unit shutdown cycles.
Shock absorbers are installed under the compressor feet.
12.2 - Lubricant
The compressors have the following factory lubricant charge:
polyolester oil (reference: POE 160SZ). Contact Danfoss to
order the oil. This lubricant must not be mixed with other
lubricant types.
Before start-up and after normal unit operation check that the
oil level is visible.
If an additional oil quantity is required to compensate the initial
low level in the compressors, top up the charge, using only the
permitted lubricant shown on the compressor name plate:
polyolester oil (ref: POE 160SZ).
12.3 - Evaporators and condensers
The evaporators and condensers are single-circuit plate heat
exchangers. They are tested and stamped for a maximum
operating pressure of 4870 kPa, 2820 kPa on the refrigerant side
and 1000 kPa on the water side.
The heat exchanger sizing for the whole range ensures a
saturated evaporating temperature of 4.5°C and a conden-sing
temperature of around 38°C with actual subcooling of around 4
K at the condenser leaving side, based on nominal Eurovent
conditions.
11.3 - Operation of two units in master/slave mode
(option 58)
The control of a master/slave assembly is in the entering water
piping (system return). All parameters, required for the master/
slave function must be configured using the Service
Configuration menu.
All remote controls of the master/slave assembly (start/stop, set
point, load shedding etc.) are controlled by the unit configured
as master and must only be applied to the master unit.
IMPORTANT: To permit master/slave operation both units
must be equipped with option 58.
Depending on the installation and control type, each unit can
control its own water pump.
12.4 - Parallel or serial connection of two BW10 units
Entering water control for a hydronic kit
Legend
1 Master unit
2 Slave unit
Additional CCN board (one per unit, with connection via communication bus)
Control boxes of the master and slave units
Water inlet (for customers with both units)
Water outlet (for customers with both units)
Water pumps for each unit (included as standard for units with hydronic module)
Additional sensors for leaving water control, to be connected to channel 1 of the
slave boards of each master and slave unit
CCN communication bus
Connection of two additional sensors
1 2
1
2
Leaving water control