Maintenance; Particle Filter; Replacing Components - Bosch Compress 3400i AWS Installation Manual
Indoor unit for air to water heat pump
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Also See for Compress 3400i AWS:
- Installation manual (24 pages) ,
- Operation manual (28 pages)
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8
Maintenance
DANGER
Electrical shock!
▶ Before working on the electrics, the main power supply must be
switched off.
DANGER
Risk of electric shock!
Opening the installer module may cause injury by electric shock.
▶ Do not open the installer module to replace a component. If the
installer board or one of its components needs to be replaced,
remove the installer module completely and replace with a new one.
NOTICE
Deformation due to heat!
If the temperature is too high, the insulation (EPP) in the indoor unit
deforms.
▶ When carrying out brazing work in the heat pump, protect the
insulation with a heat resistant cloth or damp cloth.
▶ Only use original spare parts!
▶ Refer to the spare parts list when ordering spare parts.
▶ Replace removed gaskets and O-rings with new ones.
The tasks described below must be carried out during an inspection.
Display activated alarm
▶ Check the alarm log (instructions for the control device).
Function test
▶ Carry out function check ( Chap. 6.5).
Install power cable
▶ Check the power cable for mechanical damage. Replace damaged
cables.
8.1
Particle filter
WARNING
Strong magnet!
Can be harmful to pacemaker wearers.
▶ Do not clean the filter or check the magnetite indicator if you are a
pacemaker wearer.
The filter prevents particles and contamination from entering the heat
pump. Over time, the filter may become blocked and must be cleaned.
The system does not need to be emptied to clean the filter. The filter is
integrated into the shut-off valve.
Cleaning the strainer
▶ Close the valve (1).
▶ Unscrew the cap (manually) (2).
▶ Take out the strainer and clean it with running water over it or by
pressure cleaning.
▶ Check attached debris on the cap's magnet (3) and clean it.
▶ Reinstall the strainer (4). For proper assembly, make sure that the
guide bumps fit into the recesses in the valve.
▶ Screw the cap back on (hand tight).
▶ Open the valve (5).
Compress 3400i AWS – 6721852066 (2023/01)
1
1.
2.
3
Fig. 17 Cleaning the strainer
8.2
Replacing components
If you intend to replace a component and the indoor unit needs to be
emptied and refilled, carry out the following steps:
1. Switch off the outdoor and the indoor units.
2. Make sure that the automatic air vent valve VL1 is open.
3. Close the valves to the heating system, particle filter SC1 and valve
VC3.
4. Drain the appliance via a suitable drain in the system.
5. Wait until no more water flows into the drain.
6. Replace components.
7. Open the filling valve VW2 to load water into the pipe leading to the
indoor unit.
8. Continue filling until only water emerges from the hose at the drain
and the indoor unit no longer contains air bubbles.
9. Close the drain and continue filling the system until the reading at the
pressure gauge GC1 is 2bar.
10.Close the filling valve VW2.
11.Reconnect the power supply to the outdoor and indoor units.
12.Ensure that the heating circulation pump PC1 (if installed) is running.
13.Pull the connector PC0 PWM cable off the primary circulation pump
(PC0) so that it runs at maximum speed.
14.Activate "auxiliary heater only" at the control unit.
15.The pressure must remain the same for 10 minutes. Only then should
the electric booster heater be deactivated at the control unit.
16.Connect the PC0 PWM contact to the primary circulation pump
(PC0).
17.Clean the particle filter SC1.
18.Open valves VC3 and SC1 to the heating system.
19.Check the pressure at the pressure gauge GC1, if the pressure is less
than 2bar top up via the filling valve VW2.
Maintenance
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4
5
2.
1.
0010033735-001
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