Bosch Compress Hybrid 7000i AW - Installing the Piping; Installing the Pressure-Relief Valve

Preparing for installation
7
Compress Hybrid 7000i AW – 6721833053 (2020/09)
Heating system with underfloor heating system and radiators in
separate heating circuits without buffer cylinders
If the water volume in the heating system is insufficient, this can lead to
an excessive number of start-stop cycles.
▶ Install a room temperature-dependent control instead of a weather-
compensated control.
Small floor areas or only a few radiators in the system can lead to the
auxiliary heater being activated in the final phase of the defrosting
process.
▶ ≥ install at least one open radiator with minimum output of 500W.
A minimum floor area is not required for the underfloor heating system.
To avoid booster heater operation and achieve optimum energy savings,
the radiator valves and several valves of the underfloor heating system
must be partially open.
Only heating circuits with mixer
▶ Install the buffer cylinder (separate installation instructions).
▶ Connect T0 flow temperature sensor as shown in connection
diagram (Fig. 45).
▶ The water volume must be at least 50 litres.
Only fan convectors
If the water volume is too low, the booster heater may be activated in the
final phase of the defrosting process.
▶ Install a buffer cylinder with a volume of at least 10 litres.
4.4 Installing the piping
NOTICE
Residue in the pipework can damage the system.
Residue and particles in the heating system impair the flow rate and lead
to faults.
▶ Before connecting the indoor unit, flush the pipe system to remove
any foreign bodies.
NOTICE
Danger of faults due to contaminants in pipework!
Solids, metal/plastic filings, flax and thread tape residue and similar
material can get stuck in pumps, valves and heat exchangers.
▶ Keep foreign bodies from entering the pipework.
▶ Do not leave pipe parts and connections directly on the ground.
▶ When deburring, make sure that no residue remains in the pipe.
▶ Mount connection sets (accessories) on the pipe as shown in figure 6 .
▶ Push the connector onto the pipe up to the catch.
▶ Tighten union nut using a suitable tool.
Fig. 6 Assembly of the compression fitting
[1] Pipe
[2] Pipe socket cap
[3] Locking ring
[4] O-ring (black for hydraulics)
[5] Connection part
▶ Install piping for the heating system in the building up to the
installation location of the indoor unit.
▶ Install insulated piping between the outdoor unit and indoor unit,
keeping the length of the piping as short as possible.
4.5 Installing the pressure-relief valve
▶ Install the pressure-relief valve in the flow outside the indoor unit.
▶ Ensure the pressure relief valve drain pip is not exposed to potential
freezing. Insulation may be required.
Fig. 7 Assembly of the pressure-relief valve
[1] Water pressure relief valve
[2] O-ring
[3] Pressure-relief valve connector pipe
[4] Retaining spring
[5] Gasket
0010036538-001
3
2
1
4
5
0010036552-001
1
2
3
4
5
1.
2.