RHOSS TCAEBY 269 Mode D'emploi page 77

VPF accessory – Variable primary Flow
The energy used for the cooling unit to work is an important component in the system costs, and reducing the unit consumption, especially with partial
in the pipes the more this effect is noticed.
A solution that compensates for the problem of the energy absorbed by the pump units is using pumps driven by inverter technology, able to modulate
as the only pumps in the system; this solution generates complications related to the calibration, sizing of the venting section and system setting, which
burden the client and indirectly could affect the reliability of the machine.
The solution proposed by Rhoss
circuits and the additional energy and cost savings derived from managing
The content of water in the primary circuit is very important since it stabilises system operation, the water temperature to the system and reliability of the
cooling unit over time (recommended minimum content of 5L/kw).
The cooling circuit is equipped with pumps on the primary side with inverter adjustment and the option to manage the inverter pumps from the system
side.
1.
2.
3.
venting section)
4.
of the load, as well as on the primary side, thereby minimising the pumping energy required for it to operate correctly.
5.
systems when the cooling units are connected/switched off are avoided)
Below is a basic diagram of the VPF solution by RHOSS being used in the case of a single chiller
P/DP= single or double pump controlled by a variable frequency inverter (pumps installed and controlled by Rhoss with a 0-10V signal)
PI/DPI
and is supplied by the user (with separate supply) and in this case, Rhoss is in charge of management via the analogue signal 0-10V.
TANK= tank outside the machine
V2=2-way adjustment valve
V3=3-way adjustment valve
= differential pressure transducer
Section II :: Installation and maintenance
77
secondary variable
where energy saving depends on the
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