Commissioning - Mitsubishi Electric EHPT Serie Manual De Instalación

5
System Set Up
Manual operation and heat source setting can not be selected if the system is running.
A screen will be displayed asking the installer to stop the system before these modes
can be activated.
The system automatically stops 2 hours after last operation.
<[Floor dry up function]>
The Floor dry up function automatically changes the target hot water temperature
in stages to gradually dry concrete when this particular type of underfloor heating
system is installed.
Upon completion of the operation the system stops all the operations except the
Freeze stat. operation.
For Floor dry up function, the target flow temp. of Zone1 is the same as that of
Zone2.
Functions
Floor dry up function
Flow temp. Flow temp. increase step
(increase) Increase interval
Flow temp. decrease step
Flow temp.
(decrease)
Decrease interval
Start & Finish
Max. target temp.
Target temperature
Max. temp. period
<[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.
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: W hen 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.
Symbol Description
Set the function to ON and power on the system using the main remote
a
controller, and the dry up heating operation will start.
b Sets the increase step of the target flow temperature.
c Sets the period for which the same target flow temperature is maintained.
d Sets the decrease step of the target flow temperature.
e Sets the period for which the same target flow temperature is maintained.
f Sets the target flow temperature at the start and the finish of the operation. 20 - 60
g Sets the maximum target flow temperature.
Sets the period for which the maximum target flow temperature is main-
h
tained.
Target flow temp.
(°C )
(h)
(g) 45
40
35
(b)
(c)
30
(f)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Days
• This function is not available when a PUHZ-FRP outdoor unit is connected.
• Disconnect wiring to external inputs of room thermostat, demand control, and
outdoor thermostat, or the target flow temperature may not be maintained.
Password input screen
Password verify screen
(d)
(e)
Option/Range Unit Default
On/Off — Off
+1 - +10 ºC +5
1 - 7 day 2
−1 - −10 ºC −5
1 - 7 day 2
ºC 30
20 - 60 ºC 45
1 - 20 day 5
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