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18.2 - Installation and operation of the heat reclaim
with desuperheater option
The 30RQS/RQBSY units with the desuperheater option are
supplied with one heat exchanger per refrigerant circuit.
Typical installation diagram of twin-circuit units with the desuperheater option
&
Legend
30RQS/RQSY unit components
1
Evaporator
2
Compressor
3
Desuperheater (plate heat exchanger)
4
Air condenser (coils)
5
Expansion valve (EXV)
6
Damage limitation option in case of a fire (relief valve)
7
Electric heater to protect the desuperheater against frost (not supplied)
8
Desuperheater insulation (not supplied)
9
Unit control box
10 NA
11 Desuperheater water inlet
12 Desuperheater water outlet
13 Evaporator water inlet
14 Evaporator water outlet
15 Unit with desuperheater option without hydronic module
16 System heat load
17 Border between the 30RQS/RQSY unit and the typical installation
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30RQS/RQSY unit with desuperheater option without hydfronic module
Border between 30RQS/RQSY unit and the system
Typical installation
During the unit installation the heat reclaim plate heat
exchangers must be insulated and frost protected, if required.
Please refer to the typical installation diagram below for the
main components and functions of the 30RQS/RQSY units
with the desuperheater option.
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Installation components (installation example)
20 Pump (hydronic circuit of the desuperheater loop)
21 Shut-off valve
22 Desuperheater water flow balancing and control valve
23 Damage limitation option in case of a fire (relief valve)
24 Expansion tank
25 Charge or drain valve
26 Air purge
27 Heat exchange coil or plate heat exchanger
28 Pressure gauge
29 Flow switch
30 Pump (domestic hot water circuit)
31 Three-way valve + controller
32 Filter to protect the pump and the desuperheaters
33 District water supply
34 Domestic hot water outlet
8
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