Manual code 75803707A.0708
Page 19 of 64
4.6.4 WATER COILS
It will be necessary to install inlet and outlet pipes on both machines with chilled water coils and those with hot
water coils. The diameters of the pipes and the inlet and the outlet unions are indicated in the order confirmation.
The water inlet and outlet unions are indicated in the figure below. The unions can also be identified by their
adhesive labels.
The maximum pressure of the water supply to the coils is 16 bar (1.6 Mpa). The maximum pressure difference
between the water inlet pipe and the outlet pipe is 1 bar (100 kPa), as at pressure differences greater than this value the
return spring would not be able to shut off the water flow. In the event of greater pressure differences, it will be necessary
to install a pressure reducing valve upstream of the 3-way valve.
To ensure that circuit pipes are installed correctly, we recommend that the following indications are
observed:
• Use pipes made of copper or steel
• Support pipes with suitable brackets (1)
• Insulate both pipes with Armaflex type insulation (2)
• Install shut-off valves to facilitate maintenance (3)
• Install a Thermometer (4) and Pressure gauge (5) on the inlet and outlet
• Install a drain outlet in the lowest part of the circuit (6)
• Use a water/glycol solution where necessary
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