SystemAir SyScrew Water EVO CO 1070 /S, Руководство по установке и обслуживанию

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16
4 - Installation (continued)
4.5 Hydraulic connection
The water inlet/outlet fittings shall conform to the instructions
provided by the plates affixed neat the connection points.
4.4 Hydraulic connection of the condenser
WARNING
The external hydraulic circuit must ensure the
water flow to the condenser under any working
or adjustment conditions.
The cooling of the units is generally ensured by connecting the
condenser to a cooling tower, though the units can be cooled also
with well water.
In the presence of a water-cooled condenser, it is necessary to check
the flow rate and/or the temperature of the cooling fluid that flows
through the condenser, so as to maintain the refrigerant pressure at
values that can ensure a satisfactory operation.
When a cooling tower is used, the simplest regulation methods
consist of checking the operation or the speed of the fan or the air
volume, by means of a damper, once the pilot thermostat has been
installed in the basin of the tower.
Alternatively, or if no water from a cooling tower is used, you can
adopt a recirculaton system provided with a 3-way valve.
This circuit shall consist of:
Q
A circulation pump that can ensure the necessary capacity and
discharge head.
Q
A flow meter to turn off the appliance when no water is circulating.
WARNING
The flow meter must be connected in series, as
shown in the wiring diagram of the control panel.
To install the flow meter, follow the manufacturer’s instructions.
As a general rule, the flow meter shall be mounted on a horizontal
pipe, at a distance from the curves equal to 10 times the diameter
of the pipe and far from valves or other components that are likely
to hinder the water flow upstream of or downstream from the flow
meter.
Q
The bleed valves must be mounted on the highest point of the
piping.
Q
The stop valves must be mounted on the piping of the water
entering/leaving the condenser.
Q
The discharge points (provided with plugs, cocks etc.) must be
arranged in the lowest point of the piping.
Furthermore:
Q
Provide the condenser with a by-pass circuit, equipped with a
shutoff valve.
Q
Insulate piping, to prevent the risk of heat loss.
Q
Install a filter on the suction side of the condenser.
Q
A three-way valve should be installed on-site. It permits to
bypass the condenser for correct operation at low return water
temperature. The best position is close to the condenser.
To install the flow meter, follow the diagram illustrated in paragraph
4.3.