KAPPA V ECHOS AC IOM.pdf - Industrial Air

6.4 EVAPORATOR WATER PIPE CONNECTIONS
The water inlet and outlet must be connected in the positions indicated
as labelled on the unit.
If incorrectly connected the antifreeze thermostat will not operate and the evaporator may freeze.
A constant water flow to the evaporator must be guaranteed at all
operating conditions to prevent liquid refrigerant from entering the
compressor and causing irreparable damage.
Compressors start and stop often due to changes in cooling demand. In hydraulic circuits with low water volume,
where the thermal inertia action is low, it is advisable to verify that the water volume equals or exceeds the
following ratio:
24 ∙ Q COMPTOT
M>= ---------------------
N
where:
M = system water content [kg]
QCOMPTOT = unit cooling capacity [kW]
N = number of capacity steps
EVAPORATOR WATER
If the water volume does not reach the value given by the formula, it is advisable to provide the circuit with a
storage vessel to increase the volume (tank + circuit) to match the result of the formula.
The chilled water piping and storage vessel must be insulated to prevent condensation on the pipe surfaces and
to avoid circuit performance losses.
It is mandatory to install a flow switch (supplied with the unit) on the
evaporator water outlet connection identified by the following decal:
EVAPORATOR WATER
It is compulsory to install a metallic filter, on the water inlet piping. If
a filter is not installed the warranty will be terminated immediately.
Blue Box 27