Installation
Compress Hybrid 3400i AW – 6721861825 (2023/08)
16
5.5 Connecting the indoor unit to the external booster
heater and heating system
NOTICE
Deformation due to heat!
If the temperature is too high, the insulation material in the indoor unit
deforms.
▶ Do not solder the piping to the indoor unit.
▶ Use clamp couplings to connect the pipes to the outdoor unit if
available.
NOTICE
Risk of material damage due to leaking connections!
Mechanical stresses in connecting pipework can result in leaks.
▶ Install connecting pipework without mechanical stresses at the
connections on the boiler.
▶ Ensure that all connections are tight.
Establish the following connections at the indoor unit:
• Connect the return [3] from the heating system with particulate filter
[1].
• Connect the flow [2] to the heating system.
• Connect the pipework from the external booster heater [4].
• Connect the pipework to the external booster heater [5].
• Route a drain hose on a slope to a frost-free drain.
Fig. 23 Connection of the indoor unit to the heating system and the booster heater (example representation with bypass and additional heating pump)
[1] Particle filter
[2] Flow to heating system
[3] Return from the heating system
[4] Flow to the auxiliary heater
[5] Return to the auxiliary heater
[6] DHW connection (combi boiler)
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