AERMEC NRP 0800 - With pumps (P2÷P4;R2+R4)

22.11  5806712_07 31
With pumps (P2÷P4 / R2÷R4)
Unit 0804 version A cannot be congured with a twin pump on both
the system side and the recovery side.
 For all congurations 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 (COLD WATER PRODUC-
TION SYSTEM SIDE)
2 Plate heat exchanger (HOT WATER PRODUC-
TION RECOVERY SIDE)
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 shut-o valves
15 Drain valve
16 Pressure relief valve
17 Storage tank
18 Pressure gauge
19 Flow switch (MANDATORY)
20 Expansion vessel
21 Drain valve
22 Loading unit
23 Antifreeze electric heater
7
2
5
5
1
5
5
13
13
13
13
14
14
6
14
14
3
3
3
3
3
15
6
19
18
17
20
16
8
21
7
15
8
19
B
A
B
A
16
18
18
17
11
12
6
11
12
6
22
4
4
23
10
10
9
10
10
9
HOT
SIDE
COLD
SIDE
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 dierent 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.