Replacing The Pump; Replacing The Temperature Sensor - Bosch Compress Hybrid 7000i AW Installer's Manual

Maintenance
9.2.1

Replacing the pump

▶ De-energise the indoor unit and outdoor unit.
▶ Drain the heating system (Chapter 9.1).
▶ Remove the cover (Chapter 5.3.1).
▶ Allow the system to cool and depressurise it.
▶ Pull off 2 plugs (power supply and signal) on the pump (Fig. 37).
▶ Remove the lock screw and pull the locking plate forwards and out
(Fig. 38).
NOTICE
Damaged and leaking connector pipes!
The screw fittings and connector pipes may be damaged if excessive
torques are applied when loosening and tightening the union nuts.
▶ Use a suitable tool.
▶ Counterhold at the coupling points.
▶ Perform the disassembly and assembly correctly.
▶ Undo union nuts at the pump then remove the pump and gaskets
(Fig. 39). As you do so, counterhold at the coupling points using a
suitable tool.
▶ Insert new pump with new gaskets and fit union nuts on the pump.
Tighten the union nuts by hand then use a tool to turn them by approx. ¼
revolution.
▶ Fit locking plate.
▶ Connect cables.
▶ Fill and vent heating system (Chapter 7.1).
▶ Carry out tightness test.
▶ Restore the power supply to the indoor and outdoor unit.
2
Fig. 37 Unplug the plug
[1] Plug for PWM signal
[2] Plug for power supply
28
Fig. 38 Remove locking plate
1
Fig. 39 Undo union nuts
9.2.2

Replacing the temperature sensor

▶ De-energise the indoor unit and outdoor unit.
NOTICE
Malfunction of the system!
0010031769-001
The heating system could malfunction if the temperature sensor is
connected incorrectly or swapped round.
▶ Do not swap the temperature sensor round (Chapter 12.1).
▶ Establish electrical connection correctly (Chapter 12.2).
1. 1. 1.
2. 2. 2.
Compress Hybrid 7000i AW – 6721833053 (2020/09)
0010031771-001
0010031772-001