Preparing for installation
Compress Hybrid 7000i AW – 6721833053 (2020/09)
8
4.6 Installing the heating pump (optional)
( Chapter 12.1, page 30)
Whether or not it is necessary to install a heating pump depends on the
configuration of the heating system and the amount of system
resistance.
▶ Select the heating pump based on the required pump flow rate and
pressure loss.
▶ Install the bypass [1] between the flow [2] and return [3] (Fig. 8)
to hydraulically uncouple the heating pump from the heating circuit.
Observe the prescribed dimensions and clearances during assembly
(Tab. 3).
Table 3 Pipe diameter and bypass lengths
Fig. 8 Indoor unit with heating circuit and bypass
[1] By-pass
[2] Flow
[3] Return
Fig. 9 Detailed view of bypass
[L] Minimum bypass length
[D] Pipe size
Fig. 10 By-pass
[A] Bypass, straight design
[B] Bypass, U-shaped design (total length including the elbow)
4.7 Maximum sensor
In some countries a high limit safety cut-out is required in underfloor
heating circuits.
▶ Observe country-specific regulations.
▶ Establish connection as described in chapter 6.7.7.
4.8 Insulating the hydraulic pipework
Insulating the pipework inside the building
CAUTION
Risk of burning!
Contact with uninsulated piping can inflict burns to the skin.
▶ Insulate all heat-conducting pipework using suitable thermal
insulation according to applicable regulations.
Insulating the pipework outside the building
NOTICE
Material damage from frost!
In case of a power outage the water in the hydraulic pipework may freeze.
▶ Use insulation with a thickness of at least 19 mm for pipework outdoors.
▶ Use insulation with a thickness of at least 12 mm for pipework indoors.
Insulating the pipework in the indoor unit
If the heating system is used for cooling below the dew point
(not recommended):
▶ Install vapour-tight insulation on all connections and pipework to
prevent condensation.
Dimensions/clearances Unit Value
External diameter D mm ≥ 22
Minimum bypass length L
• Straight version A
• U-shaped version B
mm
mm
≥200
≥100
Maximum clearance
between bypass and
indoor unit
m 1 – 2
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