Commissioning; Pre-Commissioning Exercises- Potable/Dhw Circuit - Mitsubishi Electric ecodan ERST20 series Installationshandbuch

5
System Set Up
<energy monitor settings>
In this menu, all parameters required to record the consumed electrical energy and
the delivered heat energy which is displayed on the main remote controller can be
set. The parameters are an electric heater capacity, supply power of water pump
and heat meter pulse.
Follow the procedure described in General Operation for the set up operation.
For Pump 1, *** can be also set besides this setting.
In the case *** is selected, the system acknowledges "factory fitted pump" is se-
lected.
Refer to the section [Energy Monitor] in "3. Technical Information"
<external input settings>
demand control (in4)
The selection of "OFF", whilst a signal is being sent to IN4, forcefully stops all
the heat source operations and the selection of "Boiler" stops operations of
heat pump and electric heater and performs boiler operation.
Outdoor thermostat (in5)
The selection of "Heater", whilst a signal is being sent to IN5, performs
electric-heater-only operation and the selection of "Boiler" performs boiler
operation.
<Password protection>
Password protection is available to prevent unauthorised access to the service
menu by untrained persons.
resetting the password
If you forget the password you entered, or have to service a unit somebody else
installed, you can reset the password to the factory default of 0000.
1. From the main settings menu scroll down the functions until Service Menu is
highlighted.
2. Press CONFIRM.
3. You will be prompted to enter a password.
4. Hold down buttons F3 and F4 together for 3 seconds
5. You will be asked if you wish to continue and reset the password to default set-
ting.
6. To reset press button F3.
7. The password is now reset to 0000.
<Manual reset>
Should you wish to restore the factory settings at any time you should use the
manual reset function. Please note this will reset ALL functions to the factory de-
fault settings.
<Sd card>
The use of an SD memory card simplifies the main remote controller settings in the
field.
*Ecodan service tool (for use with PC tool) is necessary for the setting.
6

Commissioning

Pre-commissioning exercises- potable/dHW circuit

Initial fill procedure:
Ensure all pipe joints and fittings are tight and secure.
Open the most distant DHW tap/outlet.
Slowly/gradually open the mains water supply to begin filling unit and DHW pipework.
Allow most distant tap to run free and release/purge residual air from installation.
Close tap/outlet to retain fully charged system.
note: When an immersion heater is fitted, do nOt energise the heater until the dHW tank is full of water. Also do nOt energise any immersion heater if any
sterilisation chemicals remain in the dHW tank as this will cause premature failure of the heater.
Initial flush procedure:
Energise system to heat-up cylinder unit contents to a temperature of approx. 30 - 40°C.
Flush/drain the water contents to remove any residue/impurities resulting from the installation works. Use the cylinder unit drain cock to safely discharge the warmed water
to drain via a suitable hose.
On completion, close drain cock, re-fill system and resume system commissioning.
Password input screen
Password verify screen
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