Carrier 30WG 080 - 16.4 - Oil charge adjustment; 16.5 - Operation of two units in master;slave mode (option 58); 16.6 - Parallel or serial connection of two 61 WG;30 WG;30 WGA units; 17 - MAJOR SYSTEM COMPONENTS AND OPERATION DATA

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16.4 - Oil charge adjustment
If a suction riser is used, the oil charge must be adjusted. Add
the equivalent volume to half of the lower part of each siphon
trap (see gure below), when the unit is empty.
Oil volume for a siphon trap
16.5 - 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 Conguration menu.
All remote controls of the master/slave assembly (start/stop,
set point, load shedding etc.) are controlled by the unit
congured 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.
16.6 - Parallel or serial connection of two 61WG/30WG/
30WGA units
Entering water control for a hydronic kit
1
2
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
17 - MAJOR SYSTEM COMPONENTS AND OPERATION
DATA
17.1 - Compressors
61WG/30WG/30WGA units use hermetic scroll compressors.
The only refrigerant permitted for these compressors is
R-410A.
30WGA split units operating with an air-cooled condenser,
are supplied with the refrigerant circuit and consequently
the compressor under nitrogen pressure of 100 kPa (1 bar).
The compressors are not certied for mobile applications or
use in explosive environments.
For more information contact the Carrier service team for
maintenance instructions.
IMPORTANT: All compressor and system pressure tests
must be carried out by qualied 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
(61WG/30WG/30WGA): 2820 kPa (28.2 bar)
• • Maximum operating pressure, high-pressure side
(61WG/30WG): 4870 kPa (48.7 bar).
• • Maximum operating pressure, high-pressure side
(30WGA): 4170 kPa (41,7 bars)
•
These setpoint must be observed for 30WGA split units using
an air-cooled condenser, when the installer checks the
complete system leak tightness.
1
2
Leaving water control
Seelegendinthenextcolumn.