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The water used must be analysed and, if necessary, treated
(we recommend contacting a qualified water treat-
ment specialist). The analysis will reveal whether the water is suitable for use with the various materials it will
come into contact with and prevent the formation of electrolytic couples:
- 99.9% copper tubes brazed with copper and silver
- threaded bronze couplings or flat steel flanges, depending on the unit model
- plate heat exchangers and AISI 316/DIN 1.4401 stainless steel connections brazed with copper and silver.
Electrolyte couplings may be obtained from specialist distributors in the case of major corrosion problems.
2.3 Electrical connections
Aqualis 2
complies with the requirements of the European Low Voltage Directive and, more specifically, with those of inter-
national standards EN 60335-1, EN 60335-2-40, EN 61000-6-1, EN 61000-6-2, EN 61000-6-3 and EN 61000-6-4.
Always disconnect the unit before attempting to wire connections. Remove the top as shown in Figure 1 and make a connec-
tion to terminal block J1 on the PSU board
(the one with the contactor). Make sure the terminals are securely tightened.
- The characteristics of the mains supply must be identical to those on the data plate.
- The electrical power supply must meet the following requirements:
230 V
50 Hz for models
20 to 35
single-phase + n earth.
and
400 V
50 Hz for models
35 to 75
three-phase + n earth.
- All connections must be wired in compliance with the codes and regulations that apply to the location where the system is
installed
(e.g. NF C 15100 in France) and are under the responsibility of the installer.
Failure to comply with the requirements of the above standards will void the CIAT warranty.
IMPORTANT:
- Connect the unit to earth before making any other electrical connections.
- A neutral wire must be placed on all three-phase models.
- A main cut-off switch must be installed on the unit
(see electrical specifications table on page 14).
+6%
-10%
+6%
-10%
Fig. 1
Note:
a conduit and cable clamp
are provided to ease the
installation of the power
cable.
It is your responsibility to protect the unit from mains voltage spikes and voltage spikes caused by lightning. Depending on
the geographic location and the type of mains network (buried or overhead), you may have to install a lightning rod. Check
your local electrical codes and regulations.
Conduit
Conduit
Cable clamp
1 )
Remove the middle screw
(rear of unit)
2 )
Detach both ends
(as shown in picture)
3 )
Remove of the top
(by sliding it toward the rear)
2-2-8.4 Effect of the glycol content on system performance
Glycol/water mixture factors
30% concentration by weight
of monopropylene glycol
40% concentration by weight
of monopropylene glycol
COOLING MODE
Corrected refrigerant pressure
0.98 x pure water refrigerant pressure
1 x pure water refrigerant pressure
Corrected water flow
1.03 x pure water flow
1.05 x pure water flow
System pressure drop
1.35 x pure water delta P
1.55 x pure water delta P
HEATING MODE
Corrected refrigerant pressure
1 x pure water refrigerant pressure
1 x pure water refrigerant pressure
Corrected water flow
1.04 x pure water flow
1.07 x pure water flow
System pressure drop
1.30 x pure water delta P
1.40 x pure water delta P
