Installation manual

12
Water connections
Make the plate heat exchanger hydraulic connections with
the necessary components, using material which will
guarantee that the screwed joints are leak proof. The
typical hydraulic circuit diagram shows a typical water
circuit installation in an air conditioning system.
For an application with a water circuit, the following
recommendations must be taken into account:
1. The pump must be fitted immediately before the heat
exchanger and after the connection to the system
return (unit without hydronic module).
2. It is advisable to install shut-off valves to allow
isolation of the most important circuit components, as
well as the heat exchanger itself.
These valves (ball, globe or butterfly valves) should
produce a minimum loss of charge when they are open.
3. Provide unit and system drains and vents at the lowest
and highest system points respectively.
4. Install purges in the higher sections of the installation.
5. Flow setter should be installed after the pump on the
return circuit. Leaving approx 200mm to avoid any
turbulence from the pump
6. All piping must be adequately insulated and
supported.
Installation of the following components is obligatory:
1. The presence of particles in the water can lead to
obstructions in the heat exchanger. It is therefore
necessary to protect the heat exchanger inlet with a
filter or dirt separator. The filter mesh gauge must be at
least 10 mesh/cm2.
2. After assembling the system, or repairing the circuit,
the whole system must be thoroughly cleaned with
special attention paid to the state of the filters.
3. Flow rate control is made by the control valve on the
flowmeter/setter installed after the pump (see fig 9
item 11).
4. When water has to reach temperatures below 5°C, or
the equipment is installed in areas subject to
temperatures below 0°C, it is necessary to mix water
with inhibited monopropolyne glycol in a suitable
concentration.
System cleaning and Water Characteristics
In the case of a new installation, or cleaning the
circuit, it is necessary to perform a preventive
cleaning of the system. In order to guarantee the
good operation of the product,each time you clean
the system, replace the water or add glycol, check
that the liquid appears clear, without visible
impurities and that the hardness is less than 20 ° f
Fig. 8 - Integrated water circuit
1.Automatic valve with air vent
2. Flow switch
3.Pressure relief valve (300kPa, outlet 1/2’)
4.Temperature probe
Fig. 11
A - Water flow rate, (l/s)
B - Pressure drop (kPa)
Water Connections (Fig. 8/9/11)
Pipe water content
Internal Diameter Outer diameter Liters / meter
copper 12 mm 14 mm 0,11 l/m
14 mm 16 mm 0,15 l/m
16 mm 18 mm 0,20 l/m
20 mm 22 mm 0,31 l/m
25 mm 28 mm 0,49 l/m
32 mm 35 mm 0,80 l/m
steel 12.7 mm (1/2'')" " 3/8'' Gas 0,13 l/m
16.3 mm (5/8'')" " 1/2'' Gas 0,21 l/m
21.7 mm (7/8'')" " 3/4'' Gas 0,37 l/m
27.4 mm (11/16'')" " 1” Gas 0,59 l/m
Unit
Aeromax Plus
4kw 6kw 8kw 12kw 15kw
Nominal water
flow
Std l/s
0.2 0.28 0.33 0.58 0.69
Working
pressure
Max kPa
300 300 300 300 300
Filling pressure Min kPa
120 120 120 120 120
Difference in
level with unit
at lowest level
Max m
20 20 20 20 20