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11.Connect the EMS-BUS cable to accessories if needed.
12.Fill and vent the DHW cylinder.
13. Fill and vent the heating system before commissioning.
14.Establish the electrical connection of the system.
15.Commission the system.
16.Vent the heating system also during the commissioning.
4.5
Sizing the gas DHW circulation lines
If the following conditions are observed, an extensive calculation can be
omitted for one to four-family houses:
• DHW circulation, single and common lines with an internal diameter
of at least 10 mm
• DHW circulation pump DN 15 with a flow max. of at most 200 l/h and
a flow pressure of 100 mbar
• Length of the DHW lines max. 30 m
• Length of the DHW circulation line max. 20 m
• The temperature drop must not exceed 5 K
To easily observe these specifications:
▶ Install a control valve with thermometer.
To save electrical and thermal energy, do not run the DHW circulation
pump continuously.
4.6
Installation of accessories
Placement of the Connect-Key K30RF
You can find information on the Connect-Key K30RF, the WIFI
connection, establishing the connection with the Internet and
integration of accessories in the corresponding app and in the packaging
of the Connect-Key K30RF.
▶ Place the module in the holder ([1], figure 18). A LED will flash
when properly inserted.
Fig. 18 Connect-Key K30RF placement
Compress 5800i AW – 6721858460 (2023/06)
1
0010040169-001
4.6.1
External connections
Maximum load at relay outputs: 5A, 400W, cos At a higher load
an intermediate relay must be installed.
• Relay output PK2 is active in cooling mode. Possible application
areas:
– Changing between cooling/heating for fan coils. This requires that
the fan convector's control unit has this feature.
– Pump control in a separate circuit which is exclusively intended
for cooling mode.
– Underfloor heating system control in damp rooms.
4.6.2
Safety thermostat
In some countries, a safety thermostat is required to be installed in under
floor heating circuits. The safety temperature limiter is connected to
external input 3. Set the operation for external input ( control unit
manual).
It is recommended to use a safety thermostat with automatic reset.
If the switching temperature of the safety thermostat is set too low or the
thermostat is placed too close to the indoor unit, this may lead to a
temporary blockage of the heating circuit pump PC1 and the heat
sources after DHW charging.
▶ Set a temperature that is suited for the floor.
▶ Place the thermostat at least >1m from the indoor unit.
4.6.3
Summary alarm (with accessory module)
The appliance has no output for summary alarm. If there is a need for a
summary alarm this has to be accomplished by installing of an accessory
module MU100.
▶ Install the accessory module and do the settings for summary alarm
before commissioning of the system ( manual for accessory
module).
4.7
Installation with cooling mode
4.7.1
Installation with non-condensing cooling mode
A room temperature-dependent control unit must be installed for cooling
mode.
Installing room temperature-dependent control units with an integrated
condensation sensor increases the safety of cooling mode since the flow
temperature in this case is automatically controlled via the control unit in
accordance with the current dew point.
▶ Insulate all connections and pipes from condensation.
▶ Install a non-return valve.
▶ Install the room temperature-dependent control unit ( instructions
for the respective room temperature-dependent control unit).
▶ Mount the condensation sensor.
▶ Make necessary settings for the cooling mode in the service menu,
section Heating circuit settings ( instructions for control unit).
– Select Cooling or Heating and cooling.
– If necessary, set switch-on temperature, switch-on delay,
difference between room temperature and dew point and
minimum flow temperature.
Installation
15
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