Daikin ERAD 120E-SL, Инструкция по установке, эксплуатации и обслуживанию

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Table 11 - Acceptable water quality limits
PH (25°C)
6,8

8,0
Total Hardness (mg CaCO
3
/ l)

200
Electrical conductivity

S/cm (25°C)

800 Iron (mg Fe / l)

1.0
Chloride ion (mg Cl
-
/ l)

200 Sulphide ion (mg S
2 -
/ l) Nessuno
Sulphate ion (mg SO
2
4
-
/ l)

200
Ammonium ion (mg NH
4
+
/ l)

1.0
Alkalinity (mg CaCO
3
/ l)

100
Silica (mg SiO
2
/ l)

50
Evaporator and recovery exchangers anti-freeze protection
All evaporators are supplied with a thermostatically controlled anti -freeze electrical resistance, which provides adequate
anti-freeze protection up to
–25°C. However, this method is not the only protection system against freezing, unless the
heat exchangers are completely emptied and cleaned with anti-freeze solution.
Two or more protection methods should be foreseen when designing the system as whole:
Continuous water flow circulation inside piping and exchangers.
Addition of an appropriate amount of glycol inside the water circuit
Additional heat insulation and heating of exposed piping
Emptying and cleaning of the heat exchanger during the winter season
It is the responsibility of the installer and/or of local maintenance personnel to ensure two or more of the described anti -
freeze methods. Continuously verify, through routine checks, that appropriate anti -freeze protection is maintained.
Failure to follow the instructions above could
result in damage to some of the machine’s components. Damage from
freezing is not covered by the warranty.
Installing the flow switch
To ensure sufficient water flow through the evaporator, it is essential that a flow switch be installed on the water circ uit.
The flow switch can be installed either on the ingoing or outgoing water piping. The purpose of the flow switch is to stop
the machine in the event of interrupted water flow, thus protecting the evaporator from freezing.
If the machine is supplied wit
h total heat recovery, install another flow switch to ensure water flow before the machine’s
functioning is modified in Heat recovery Mode.
The flow switch on the recovery circuit prevents the machine turning off because of high pressure.
The manufacturer offers an optional flow switch that has been especially selected for this purpose; its identification code
is 131035072.
This flow switch, of the palette type, is suitable for heavy-
duty outdoor applications (IP67) and suitable for piping with 1”
to 6” diameter.
The flow switch is provided with a clean contact which must be electrically connected to terminals 708 and 724 of
terminal board MC24 (check the unit wiring diagram for further information).
For further information regarding device positioning and settings, please read the instruction leaflet placed inside the
apparatus’ box.
Figure 9 - Adjusting the safety flow switch
3”
83 mm
4” 107 mm
5” 134 mm
6” 162 mm

5 mm
For 3”

6” piping
Use palette b = 29 mm
Adjusting the flow switch’s
trigger sensitivity