Transport And Storage; Insulation; Checklist; Removing The Front Cover Of The Indoor Unit - Bosch Compress 3400i AWS Installation Manual

Installation
temperature. Comfort can also be adversely affected by using the
incorrect sensors.
▶ Make sure that you use the correct sensor with the appropriate
characteristics when exchanging a sensor (Chapter 11.6). Using
sensors with other characteristics will lead to problems because the
system will be controlled with reference to the incorrect temperature.
5.1

Transport and storage

The indoor unit must always be transported and stored in an upright
position. If needed, it may be leaned temporarily.
The indoor unit may not be stored or transported at temperatures below
– 10 °C.
5.2

Insulation

NOTICE
Material damage from frost!
In case of a power failure, the water in the pipes may freeze.
▶ All heat-conducting pipework must be provided with suitable thermal
insulation according to applicable regulations.
If it is envisaged that the cooling operation will be carried out below the
dew point, all connections and pipes must be appropriately insulated in
accordance with the valid regulations (minimum insulation thickness 13
mm).
5.3

Checklist

Each installation is different. The following checklist contains a general
description of the recommended installation steps.
As a recommendation, the refrigerant line should be connected before
the hydraulic connections.
The particle filter is installed horizontally in the heating system return
upstream of the inlet of the indoor unit. Note the direction of flow of the
filter.
1. Remove the front cover of the indoor unit.
2. Assemble the drip tray.
3. Mount the leakage copper pipe and assure the proper pipework from
the indoor unit.
4. Connect the refrigerant pipes from the outdoor unit to the indoor
unit.
5. Connect the indoor unit to the heating system.
6. Connect, fill and vent the DHW cylinder (if installed).
7. Before starting operation, fill the heating system.
8. Vent the heating system.
9. Install the outside temperature sensor and, if necessary, the room
controller.
10.Connect the CAN-BUS cable to the outdoor and indoor unit.
11.Install accessories (heating circuit module, etc.).
12.If required, connect the EMS BUS cable to the accessory.
13.Establish the electrical connection of the system.
14.Put the heating system into operation. Use the control unit to make
the necessary settings ( instructions for control unit).
15.Check that all sensors display the appropriate values.
16.Check and clean the particle filter.
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17.Check the operation of the heating system after starting up (
instructions for control unit).
5.4

Removing the front cover of the indoor unit

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Fig. 6 Remove front cover
To remove the front cover of the indoor unit, follow these steps:
1. Unscrew the lower part of the front cover.
2. Hold the lower part of the front cover on the holders.
3. Unscrew the upper part of the front cover.
4. Remove the upper part of the front cover.
5. Remove the intermediate connector of the control device and
complete the removal of the lower part of the front cover.
Compress 3400i AWS – 6721852066 (2023/01)
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