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Below is a schematic diagram using the HITECSA VPF solution when there is a single chiller:
Single or double pump operated by a variable frequency inverter (pumps managed by HITECSA with a 0-10V signal)
P/DP
Single or double pump, controlled by a variable frequency inverter to service the system. Adjustment is carried out by means of flow modula-
PI/DPI
tion and is supplied by the user (with separate supply) and in this case, HITECSA is in charge of management via the analogue signal 0-10V
Storage tank
TANK
2-way adjustment valve
V2
3-way adjustment valve
V3
Differential pressure
ΔP
System side pumps
PLI
Primary side pumps
PLP
Disconnector
DSC
Probe ∆P (by the customer)
S∆P
Utility
UT
NOTES on the installation:
1. If a cooling unit with VPF technology is installed, a tank must be installed to guarantee minimum water content of 5 l/kw on the primary side. At least
20% of the flow must be guaranteed on the system side by installing a minimum number of terminals fitted with 3-way valves V3
2. The probe to determine the ΔP pressure differential is a standard supply. The installer can set the probe remotely in the most appropriate point in the
system.
3. Probes T1 and T4 are supplied and must be installed on the return side of the system, as shown in the figure: T1 before the hydraulic disconnector
and T4 after.
VPF_R (Variable Primary Flow by HITECSA in the main exchanger). VPF_R includes the temperature probs, the inverter management and the management
software of the chiller;
VPF_R+INVERTER P1/DP1/ASP1/ASDP1 (Variable Primary Flow by HITECSA in the main exchanger). The accessory includes management via inverter
of the primary side pump(s) supplied as optional P1/DP1, ASP1/ASDP1 (check that the total water content is at least 5lt/kW), the temperature probes and
the management software of the chiller
VPF_R+INVERTER P2/DP2/ASP2/ASDP2 (Variable Primary Flow by HITECSA in the main exchanger). The accessory includes management via inverter
of the primary side pump(s) supplied as optional P1/DP1, ASP1/ASDP1 (check that the total water content is at least 5lt/kW), the temperature probes and
the management software of the chiller
IOM_EQRU-SS_EQRHU-SS_2160a4350_208676_230601_ES-EN-FR-DE-IT
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