D-EIMWC003H02-18_02EN - 13/34
Make sure that the water inlet and outlet connections agree with the dimensional drawing and the indications found on the
connections. Incorrect water pipe installation could create machine malfunctions and/or reduce performance.
NOTE
When using a hydraulic connection shared with the heating system, make sure the temperature of the water flowing into the
evaporator does not exceed the maximum allowed value. This phenomenon might cause the safety valve to open and thus
the refrigerant to discharge into the atmosphere.
The pipes, before being attached to the machine, must be supported to reduce the weight and the stress on connections. In
addition, the pipes must be adequately insulated. A water filter that can be inspected must also be installed on both inputs
(evaporator and condenser). Install shutoff valves on both heat exchangers with suitable dimensions to permit draining and
inspection without having to completely drain the system in addition to the water pressure gages.
To prevent damage to exchanger pipes, install a mechanical filter that can be inspected on each
input, able to filter solid objects greater than 1.2 mm in size
2.7.2
Flow Switch
A flow switch must be installed on the evaporator inlet pipe to ensure the correct water flow rate, before the unit is started.
Furthermore, this device shuts off the unit when water flow is interrupted, protecting the machine from the evaporator
freezing.
The flow switch must not be used as a machine control system
The absence of the flow switch on the evaporator water connection, voids the warranty for frost damage.
The evaporator and condenser are not self-draining; both must be purged
Thermometers and pressure gages must be installed on the water pipes near the heat exchangers connections.
Furthermore, breather valves must also be installed at the highest points on the pipe.
If necessary, only the evaporator water caps can be reversed. If this operation is completed, new gaskets and control
sensors have to be repositioned.
Condenser inlet and outlet water connections cannot be reversed.The particular condenser
configuration only provides optimal machine operations in countercurrent. The wrong water flow
direction in the condenser reduces the overall efficiency of the machine
Should water pump noise be excessive, we recommend using rubber insulating joints at both pump inlet and outlet. In most
cases it is not necessary to install anti-vibration joints on condenser pipe inlet and outlet but, where the noise and vibration
are critical (for example where a buried pipe passes through a wall in an inhabited area), it may be necessary.
If a cooling tower is used, a balancing valve must be installed. A temperature control system is required if the water tower is
very cold. The controller installed on the machine manages tower fan on/off or continuously manages a control vale or fan
speed controller by means of a 0-10 V DC analog signal. We recommend that you carry out the connection, allowing fan
management by the machine controller (see wiring diagram for connection).
