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7.2.2 Water manifold connection
Fig. 27 – Water manifold sizes
EWWT-Q and EWLT-Q series are equipped with heat exchangers that need to work all counter-current. In these cases, the water
inlet for evaporator is on the top pipe and the water inlet for condenser is on the bottom pipe.
The EWHT-Q series works with co-current evaporator and counter-current condenser. Thus, for EWHT-Q series, the water inlets for
evaporator and condenser are both on the bottom pipes.
Fig. 28 – Water connection to modules
As reported in the previous picture, the water connection can be done from each side, there are no indication about constrain on right
/ left side. Also, the two connections related to same water loop (cold loop or hot loop) can be done on the same side or opposite
side.
The only constrain to be respected in the water connection is the pipe where the water need to enter / leave the system (as in case
of pump module).
Motor for Plate Heat Exchanger Shut-Off Valve
The manifold module is equipped with a butterfly valve in each pipe.
These shut-off valves are manual in case of standard unit, but it can be provided an actuator kit as unit accessory.
While with the manual shut-off valves the water flow rate for each exchanger is constrained on the base of the pressure drop, the
motorized valves allow to manage each plate heat exchanger’s flow rate and pressure drop.
The usage of the electric actuator allows to avoid water circulation in the plate heat exchanger of unit currently not currently operating.
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