Carrier AquaSnap 30RB Series Installation, Operation And Maintenance Instructions page 47

11.3.3 - Installation and operation of the heat reclaim with
desuperheater option
The 30RB units with the desuperheater option (No. 49) are
supplied with one heat exchanger per refrigerant circuit.
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30RB 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 (safety 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 30RB unit and the typical installation
Typical installation diagram of units with the desuperheater option
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30RB unit with desuperheater option without hydfronic module
Border between 30RB 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 30RB 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 accessory in case of a fire (safety 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 (sanitary hot water circuit)
31 Three-way valve + controller
32 Filter to protect the pump and the desuperheaters
33 District water supply
34 Sanitary hot water outlet
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