Primary And Secondary Circuit; Water Treatment; Cleaning - Evinox ModuSat FS Series Installation Manual

Valve Tolerances
The maximum flow rate will vary depending on the varying differential
pressure across the units and the resulting flow rate may differ from
the value shown above. The valve should be set to 125% above the
design flow rate. The project specific set-point (if required) can be
confirmed by Evinox Energy.
Tighten Actuator Connections
Ensure that the actuators are tightened to ensure the operation of the
unit.

3 PRIMARY AND SECONDARY CIRCUIT

Prior to the circuits being filled and isolated, they must be full pressure tested in line with
the design requirements and current regulations.
4.1

Water treatment

It's important to prevent
corrosion and oxidisation.
Therefore, the quality and
cleanliness of the water within
both the primary and secondary
circuits is vitally important, to
prevent damage to the Modusat
components and to ensure that
the efficiency and service life of
the unit is maintained.
It is therefore necessary to fully
flush and treat both primary and
secondary circuits using
suitable water treatment chemicals.
Typical water quality guidelines are as follows:
pH – this measures the alkalinity of the water, neutral alkalinity is pH7. Heating systems
require an alkaline pH.
TDS – this measures the dissolved solids in the system and is a measure of the
cleanliness of the water. Recommended levels 0-200 ppm.
Conductivity – this is the measure of the ability of water to pass an electrical current and is
affected by the presence of dissolved solids. Recommended levels 200 crs.
Free copper – this measures the level of copper in the system in mg/litre. Recommended
levels are under 1 mg/l.
Total iron – this measures iron concentration in mg/litre. Recommended levels are under 1
mg/l.
4.2

Cleaning

The cleaning and treatment of the systems must be carried out strictly in accordance with
BSRIA and CIBSE guidelines and the relevant British Standards. It is a requirement that
the following is undertaken:
Parameter
Hardness (TH)
Chlorides
PH
Resistivity
Salinity
Conductivity
TDS
Iron
Copper
Typical Water Quality Guidelines
Recommended
About 10 °F
Up to 100 mg/l
7 to 8,5
Higher than 2000 Ohm/cm
Up to 50 mg/l
200 crs
0-200 ppm
Up to 1 mg/l
Up to 1 mg/l
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