Riello 20120391, Инструкции для установщика и технической поддержки

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ACCESSORIES
INSTALLATION
INSTALLATION AND OPERATION
The units with desuperheater option are supplied with plate heat exchanger for each cooling circuit.
9
During unit installation, if necessary, the plate heat exchangers for heat recovery must be insulated and protected against
the frost.
For the main components or the functions associated with the unit with desuperheater option in a standard system, refer to the
main diagram shown below.
NXC-NXH unit components
1 Evaporator
2 Compressor
3 Desuperheater
4 Air condenser (coils)
5 Expansion valve (EXV)
6 Accessory to limit the damages in case of fire (valve)
7 Electric heater preventing the desuperheater from
freezing (not supplied)
8 Insulation for the desuperheater (not supplied)
9 Unit electric box
11 Water inlet on desuperheater
12 Water outlet on desuperheater
13 Evaporator water inlet
14 Evaporator water outlet
15 Unit with desuperheater option without hydronic
module
16 System thermal load
17 Limit between NXC-NXH units
System components (installation example)
20 Pump (hydronic circuit for desuperheater circuit)
21 Shut-off valve
22 Desuperheater water flow rate control and balancing
valve
23 Accessory to limit the damages in case of fire (valve)
24 Expansion tank
25 Charge or discharge valve
26 Air vent
27 Coil heat exchanger or plate heat exchanger
28 Pressure gauge
29 Flow rate sensor
30 Pump (domestic hot water circuit)
31 Three-way valve + controller
32 Protection filter for pump and desuperheaters
33 Common water inlet
34 Domestic hot water outlet
15
4 4
8
9
11 12 12
17
11
22
29
21 21
32
21
28
23
25
27
34
33
31
30
24
20
22 25
25
26
13 14
16
3 3
8
7
7
6 6
5 5
1
2
2
NXC-NXH with desuperheater option
without hydronic module
Standard system