Recommended Water Diagram (Fig. 11) - CIAT Ereba Installation Guide

3. Pump flow rate control is made through a flow control
valve, which must be installed on the delivery pipe
during installation.
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 ethylene glycol in suitable quantity.
Anti-seizing pump
The EREBA units are equipped with protection against
the seizing of the pump motor shaft. To allow this function,
do not empty the system or disconnect the power during
long periods of inactivity.
In any case, if the pump rotor shaft seizes after a long
period of inactivity, the user must do the following to
unblock it:
- Disconnect the power.
- Remove the front panel.
- Unscrew the shaft-protection plug on the back of the
pump.
Pipe water content
Internal Diameter
12 mm
14 mm
16 mm
Copper
20 mm
25 mm
32 mm
''12.7 mm (1/2'')''
''16.3 mm (5/8'')''
Steel
''21.7 mm (7/8'')''
''27.4 mm (11/16'')''
% Inhibited Ethylene
Glycol
Freezing
temperature(*)
Capacity
Correction
Absorbed power
Factors
Loss of head
(*) NOTE: Temperature values are indicative.
Always refer to the temperatures indicated for the speciic product used

6.3 - Recommended water diagram (Fig. 11)

For typical water circuit diagram for EREBA unit
see fig 11.
Do not use the heat pump to treat industrial process,
swimming pool or sanitary water.
In all these cases, provide an intermediate heat exchanger.
Outer diameter Liters / meter
14 mm 0.11 l/m
16 mm 0.15 l/m
18 mm 0.20 l/m
22 mm 0.31 l/m
28 mm 0.49 l/m
35 mm 0.80 l/m
3/8'' Gas 0.13 l/m
1/2'' Gas 0.21 l/m
3/4'' Gas 0.37 l/m
1' Gas 0.59 l/m
10% 20% 30% 40%
-4 °C -9 °C -15 °C -23 °C
0.996 0.991 0.983 0.974
0.990 0.978 0.964 1.008
1,003 1,010 1,020 1,033
- Insert a screwdriver in the slot and turn the rotor
shaft.
- Remount the protection plug.
- Reconnect the power.
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.
See fig. 12.
Anti-freeze protection
If unit is switched off during the winter period when
outdoor air temperatures below 0°C can occur and
ethylene glycol is not used, it is recommended that the
entire system is drained through the drain unit valve, Fig 9,
item 3, and the system drain, Fig 11, item 5.
Unit
Std l/s
nominal water flow
Min l
Water content
system unit with
Max l
expansion vessel
Max kPa
Working pressure
Min kPa
Filling pressure
Max m
Diference in level
with unit at lowest
level
TABLE TO USE FOR CALCULATING
WaTer conTenT In The SySTem
Installed Unit
Unit content (*)
Pipe content (**)
Uses (fan-coil, panels, radiators, etc.) (***)
Total content (****)
(*) Consult the technical data table
(**) Consult the pipe water content table
(***) Consult the manual for the installed uses
(****) The water content of the system must be greater than the minimum value for
units without hydronic kit. The minimum value is necessary to provide optimal
comfort.
EREBA
004_ 006_ 008_ 012_
0.20 0.28 0.33 0.58
14 21 28 42
65 65 65 95
300 300 300 300
120 120 120 120
20 20 20 20
.............
l .............
l .............
l .............
l .............
015_
0.69
49
95
300
120
20
17