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13
SERVICE AND MAINTENANCE
In addition to annual servicing it is necessary to replace or inspect some parts after a certain period of system operation. Please see tables below for detailed in
-
structions. Replacement and inspection of parts should always be done by a competent person with relevant training and qualifications.
Parts which require regular replacement
Parts
Replace every Possible failures
Pressure relief valve (PRV)
Air vent (Auto/ Manual)
Manometer
6 years
Water leakage
13-1. Annual Maintenance
It is essential that the hydrobox is serviced at least once a year by a qualified individual. Any required parts MUST be purchased from Mitsubishi Electric (safety matter).
NEVER
bypass safety devices or operate the unit without them being fully operational.
13-2. Engineers Forms
Should settings be changed from default, please enter and record new setting in ‘Field Setting’ column. This will ease resetting in the future should the system use
change or the circuit board need to be replaced.
Commissioning/Field settings record sheet
Main remote controller screen
Parameters
Default setting
Field setting Notes
Main
Zone1 heating room temp.
10°C to 30°C
20°C
Zone2 heating room temp. *1
10°C to 30°C
20°C
Zone1 heating flow temp.
20°C to 60°C
45°C
Zone2 heating flow temp. *2
20°C to 60°C
35°C
Zone1 cooling flow temp. *3
5°C to 25°C
15°C
Zone2 cooling flow temp. *3
5°C to 25°C
20°C
Zone1 heating compensation curve
−9°C to + 9°C
0°C
Zone2 heating compensation curve *2
−9°C to + 9°C
0°C
Holiday mode
Active/Non active/Set time
—
Option
Forced DHW operation
On/Off
—
DHW
On/Off/Timer
On
Heating/Cooling
On/Off/Timer
On
Energy monitor
Consumed electrical energy/Delivered energy
—
Setting
DHW *4
Operation mode
Normal/Eco *5
Normal
DHW max. temp.
40°C to 60°C *6
50°C
DHW temp. drop
5°C to 30°C
10°C
DHW max. operation time
30 to 120 min
60 min
DHW mode restriction
30 to 120 min
30 min
DHW recharge
Large/Standard
Large *7
Legionella prevention *4
Active
Yes/No
Yes
Hot water temp.
60°C to 70°C *6
65°C
Frequency
1 to 30 days
15 days
Start time
00.00 to 23.00
03.00
Max. operation time
1 to 5 hours
3 hours
Duration of maximum temp.
1 to 120 min
30 min
Heating/ Cooling *3
Zone1 operation mode
Heating room temp./ Heating flow temp./ Heating
compensation curve/ Cooling flow temp.
Room temp.
Zone2 operation mode *2
Heating room temp./ Heating flow temp./ Heating
compensation curve/ Cooling flow temp.
Compensation curve
Compensation
curve
Hi flow temp.
set point
Zone1 outdoor ambient temp.
−30°C
to +33°C *8
−15°C
Zone1 flow temp.
20°C to 60°C
50°C
Zone2 outdoor ambient temp. *2
−30°C
to +33°C *8
−15°C
Zone2 flow temp. *2
20°C to 60°C
40°C
Lo flow temp.
set point
Zone1 outdoor ambient temp.
−28°C
to +35°C *9
35°C
Zone1 flow temp.
20°C to 60°C
25°C
Zone2 outdoor ambient temp. *2
−28°C
to +35°C *9
35°C
Zone2 flow temp. *2
20°C to 60°C
25°C
Adjust
Zone1 outdoor ambient temp.
−29°C to +34°C
*10
—
Zone1 flow temp.
20°C to 60°C
—
Zone2 outdoor ambient temp. *2
−29°C to +34°C
*10
—
Zone2 flow temp. *2
20°C to 60°C
—
Holiday
DHW *4
Active/Non active
Non active
Heating/ Cooling *3
Active/Non active
Active
Zone1 heating room temp.
10°C to 30°C
15°C
Zone2 heating room temp. *1
10°C to 30°C
15°C
Zone1 heating flow temp.
20°C to 60°C
35°C
Zone2 heating flow temp. *2
20°C to 60°C
25°C
Zone1 cooling flow temp. *3
5°C to 25°C
25°C
Zone2 cooling flow temp. *3
5°C to 25°C
25°C
(Continued to next page.)
Note
▪
Within the first couple of months of installation, remove and clean the hydrobox’s strainer plus any additional filter items that are fitted external to
the hydrobox. This is especially important when installing on an old/existing pipe work system.
▪
The pressure relief valve (No. 10 on Figure 3.3) should be checked annually by turning the knob manually so that the medium is discharged, thus
cleaning the seal seat.
Parts which require regular inspection
Parts
Check every
Possible failures
Pressure relief valve (3 bar)
Temperature and pressure
relief valve
1 year
(turning the knob
manually)
PRV would be fixed and
expansion vessel would
burst
Immersion heater
2 years
Earth leakage causing
circuit breaker to activate
(Heater is always OFF)
Water circulation pump
(Primary circuit)
20,000 hrs (3 years) Water circulation pump
failure
Parts which must NOT be reused when servicing
* O-ring
* Gasket
Note:
•
Always replace the gasket for pump with a new one at each regular main-
tenance (every 20,000 hours of use or every 3 years).
•
No need to inspect pressure relief valve (5 bar) because it does not con-
tact with water unless 3 bar PRV is broken.
OCH712C
Summary of Contents for ecodan EHPX-VM2D
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