Publicidad
Idiomas disponibles
Idiomas disponibles
2.6.2. WATER CONNECTIONS
To ensure the unit works correctly, the system needs a minimum volume of water
The minimum water content is determined on the basis of the unit's cooling or heating capacity (for heat pumps) in the design of the unit, multiplied by the
coefficient expressed in 3 l/kW (*).
If the water content of the system is below the minimum value calculated, install an additional tank.
However, remember that a high water content in the system always goes to the advantage of comfort in the room, as it ensures a high thermal inertia of
the system.
* For heat pumps/air cooled, also pay attention to the temperature difference generated during the natural defrosting cycles:
DT tank and/or DHW (by defrost effect)
Specific capacity
EQRU-EQRUSS EQRHU-EQRHUSS models
Hydraulic technical data
Expansion tank capacity
Expansion tank pre-load
Expansion vessel maximum pressure
Safety valve
Water contents EQRU-EQRUSS EQRHU-EQRHUSS
Plate heat exchangers
Tank water content (ASP/ASDP)
2.6.3. PROTECTION FROM CORROSION
Do not use corrosive water, containing scale or debris; the following are the corrosive limits for the heat exchangers:
pH
SO4--
HCO3-/SO4--
Total hardness
CI-
PO43-
NH3
Fe+++
Mn++
CO2
H25
temperatures
Oxygen content
Alkalinity (HCO3)
Electrical Conductivity
Nitrate (NO3)
If you are not reasonably sure of the water quality in the table above or if there are doubts concerning the presence of different materials which could
corrode the heat exchanger over time, it is always advisable to insert an intermediate heat exchanger which can be inspected, made of materials that are
able to resist these substances.
2.6.4. PROTECTING THE UNIT FROM FROST
Indications for unit when not running
IMPORTANT!
If the unit is not used during the winter period, the water contained in the system may freeze.
IMPORTANT!
When the unit is out of service, drain all the water from the circuit.
IOM_EQRU-SS_EQRHU-SS_2160a4350_208676_230601_ES-EN-FR-DE-IT
86
K
20
l/kW 3.5
2160
2180
l
12
12
barg
2
2
barg
10
10
barg
6
6
l
12
12
l
360
360
7.5÷9.0
< 70
> 1.0
4.0÷8.5
< 50
< 2.0
< 0.5
< 0.2
< 0.05
< 5
< 50
< 65
< 0.1
70÷300
10÷500
< 100
15
12
10
5
6
7
4180
4200
4220
12
12
12
2
2
2
10
10
10
6
6
6
20
20
20
700
700
700
ppm
ppm
dH
ppm
ppm
ppm
ppm
ppm
ppm
ppb
°C
ppm
ppm
µS/cm
ppm
EQRU-EQRUSS
EQRHU-EQRHUSS
8
7
6
9
10
12
4240
4280
4330
12
12
12
2
2
2
10
10
10
6
6
6
27
27
41
700
700
700
4350
12
2
10
6
41
700
Publicidad
