Product description
5
Compress Hybrid 3400i AW – 6721861825 (2023/08)
Fig. 2 Components and ppipe connections of the indoor unit (shown
without electronic components)
[1] Condenser
[2] Low-loss header
[3] Mixing valve
Fig. 3 Bottom view of the indoor unit
[1] Return to outdoor unit
[2] Flow from the outdoor unit
[3] Return to external booster heater
[4] Flow to heating system
[5] Return from the heating system
[6] Flow from external booster heater
[7] Front of appliance
2.4 Possible combinations of indoor and outdoor units
The indoor unit is intended for installation inside the building and for
connection to heat pump outdoor units installed in the open air.
The indoor unit can be used with the following outdoor units:
• CS3400iAW 4 OR-S (ODU Split 4 kW)
• CS3400iAW 6 OR-S (ODU Split 6 kW)
• CS3400iAW 8 OR-S (ODU Split 8 kW)
2.5 Possible combinations of indoor unit and external
booster heater
The indoor unit can be operated in combination with a gas condensing
appliance, providing the gas condensing appliance satisfies the
following minimum requirements:
• Minimum modulation: factor 4
• Maximum output: 32 kW
• Integrated heating pump
• Free analogue (0 – 10 V) or digital (On/Off) input (Chapter 6.7)
If the indoor unit is to be operated without a gas condensing appliance,
additional safety equipment must be installed in the heating system in
compliance with the applicable standards and guidelines.
Single-stage boiler (not modulating), e.g. wall mounted oil condensing
boiler may only be used if they are smaller or dimensioned according to
the heating load of the building (not dimensioned to continuous DHW
output, only exclusively to the building heating load). The additional
coverage of the heating load via the heat pump must be considered.
Overdimensioning must be ruled out in order to avoid a excess and
impermissible cycling of the boiler.
DHW is only provided via the external booster heater (combi boiler)
(Fig. 23)
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