Carrier 30RB-170R Installation, Operation And Maintenance Instructions page 59

12 - OPTIONS
12.2.3.2 - Installation and operation of the heat recovery with desuperheater option
Units with the desuperheater option are supplied with one plate heat exchanger per refrigerant circuit.
When installing the unit, the heat recovery plate heat exchangers must be insulated and protected against frost if required.
Refer to the main diagram below for the main components or functions associated with a unit with desuperheater option in a standard
system.
Typical installation diagram of units with the RB/RBP desuperheater option
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Key
RB/RBP unit components
1 Evaporator
2 Compressor
3 Desuperheater (plate heat exchanger)
4 Air condenser (coils)
5 Expansion valve (EXV)
6 Damage limitation accessory 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 electrical cabinet
10 NA
11 Desuperheater water inlet
12 Desuperheater water outlet
13 Evaporator water inlet
14 Evaporator water outlet
15 Unit with desuperheater option without hydraulic module
16 System heat load
17 Border between the RB/RBP unit and the typical installation
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RB/RBP unit with desuperheater option without hydraulic module
Border between the RB/RBP unit and the system
Typical installation
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Installation components (installation example)
20 Pump (desuperheater loop hydraulic circuit)
21 Shut-off valve
22 Desuperheater water flow balancing and control valve
23 Damage limitation accessory in case of a fire (safety valve)
24 Expansion tank
25 Charging or drain valve
26 Air vent
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
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