30
This volume is necessary for temperature stability and accuracy.
To achieve this volume, it may be necessary to add a reservoir
tank to the circuit. This tank must be equipped with baffl
es
to allow mixing of the fl uid water. Please check the examples
below.
When using a bypass on the water outlet to the water inlet, the
minimum volume of water in the loop must be considered. If it is
not considered, the volume of water circulating in the units will
be too small and the units may oscillate and even trigger alarms.
(See Figure 21 by-pass below).
Application
Air conditioning
6
Industrial cooling
See NOTE
Bad
Bad
Good
Good
NOTE
For applications in industrial cooling, where the water
temperature levels must be stable, the values above must
be increased. We recommend that you contact the factory
for these special applications.
Maximum water fl ow on the evaporator
This is limited by the pressure drop allowed in the evaporator.
One must ensure a minimum Δ in the evaporator of 2.8 K,
which corresponds to a water fl ow of 0.9 l/s per kW.
Water fl ow into the loop
The minimum volume of the water loop, in liters, is given by
the following formula:
Volume = CAP (kW) x N * = liters, where CAP is the nominal
cooling capacity at nominal operating conditions.
*See the Application table below:
4. Instalation (cont.)
WFC
Mestre
01
Escrava
02
Escrava
08
REWT
RLWT
Entrada de
água
Saída de
água
Acionamento
da bomba
ULWT
ULWT
ULWT
WFC
WFC
By-pass
FIG. 21 - Interconnection diagram with by-pass
Water
Outlet
Water
Inlet
Pump
Drive
Master
Slave
Slave
