28 22.11 5806712_07
With pumps (P2÷P4 / R2÷R4)
Unit 0804 version A cannot be congured with a twin pump on both
the system side and the recovery side.
For all congurations including pump J please contact the factory.
Do not ll up the hydraulic system by glycol near the suction of the pump. High
concentration of glycol could stuck the pump. Do not use the pump to mix water
and glycol.
Water lter: Installation in the immediate vicinity of the heat exchanger is man-
datory,.
Components as standard
1 Plate heat exchanger (SYSTEM SIDE)
2 Plate heat exchanger (RECOVERY SIDE - DO-
MESTIC HOT WATER)
3 Drain valve
4 Antifreeze electric heater
5 Water temperature sensors (IN/OUT)
6 Flow shut-o valves
7 Water lter
8 Drain valve
9 Clapet valve
10 Pump
11 Expansion vessel
12 Pressure relief valve
Components not provided and responsibility of
the installer
13 Anti-vibration joints
14 Flow switch (MANDATORY)
15 Flow shut-o valves
16 Drain valve
17 Domestic hot water storage tank
18 Drain valve
19 Pressure relief valve
20 Expansion vessel
21 Storage tank
22 Pressure gauge
23 Loading unit
24 Antifreeze electric heater
7
2
5
5
1
5
13
13
13
13
15
15
15
6
15
20
19
18
3
3
3
3
14
16
22
21
20
19
8
16
7
18
8
14
A
A
11
12
6
11
12
6
23
17
4
4
24
9
10
10
9
10
10
RECOVERY
SIDE
(hot domestic
water)
SYSTEM
SIDE
(hot/cold)
Water characteristics
System: Chiller with plate heat exchanger
PH 7,5 - 9
Total hardness 4,5 - 8,5 °dH
Electric conductivity 10-500 S /cm
Temperature < 65 °C
Oxygen content < 0,1 ppm
Max. glycol amount 50 %
Phosphates (PO) < 2ppm
Manganese (Mn) < 0,05 ppm
Iron (Fe) < 0,2 ppm
Alkalinity (HCO) 70 - 300 ppm
Chloride ions (Cl-) < 50 ppm
Free chlorine < 0,5 ppm
Sulphate ions (SO) < 50 ppm
Sulphide ion (S) None
Ammonium ions (NH) None
Silica (SiO) < 30 ppm
NOTICE under no circumstances does the unit have to be operated
with water circulating on the heat exchanger whose characteristics
are dierent from those indicated in the table WATER CHARACTER-
ISTICS, under penalty of the warranty expiration. Aermec cannot be
held responsible for any malfunction of the units which are operated
with water whose characteristics are outside the limits in the table
WATER CHARACTERISTICS and for their consequences.
It is of fundamental importance to keep the oxygen concentration in
the water under control, especially in open vessel systems. This type
of system, in fact, is very sensitive to the phenomenon of extra-oxy-
genation of the water (an event that can be encouraged by the incor-
rect positioning of some components). This phenomenon can trigger
corrosion processes and subsequent drilling of the heat exchanger
and pipes.
Clapet valve
1 Clapet valve
1
The unit with double pump circuit does not have one-way valves. If you
choose to install two units in parallel or in cascade, it is recommended to pro-
vide one-way valves for the correct operation of the unit.
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