Section 17: Servicing
Page 68
16.10 Balancing the System
1. When the boiler has been adjusted and is running satisfactorily,
balance the central heating system by adjusting the radiator
lock shield valves. Start with the radiator nearest the boiler and
adjust the valves to achieve the required temperature drop
across each radiator. If thermostatic radiator valves have been
installed, check the system by-pass.
2. Switch off the boiler.
16.11 Completion
1. With the system hot, check again for leaks, rectifying where
necessary. Drain the system while it is hot to complete the
flushing process. Refill, vent and pressurise.
2. A suitable central heating system inhibitor must be added to
protect the system against the effect of corrosion.
3. A suitable antifreeze should be used to prevent damage to the
boiler in areas where electrical power failure can occur in winter
months.
4. Replace the top, front and rear panels as necessary.
After commissioning the boiler complete the Commissioning
Form and the OFTEC CD/11 commissioning report.
Leave the top copy with the User and retain the carbon copy.
NOTE
!
If the boiler is to be left in service with the User, set the controls and
room thermostat (if fitted) to the User's requirements.
If the boiler is not to be handed over immediately, close the boiler
fuel supply valve and switch off the electricity supply.
If there is any possibility of the boiler being left during frost
conditions, then the boiler and system should be drained.
Alternatively, a suitable antifreeze should be used.
!
CAUTION
To allow the boiler to be commissioned and serviced correctly a
combustion test point is provided on the front cleaning door.
The CO
2
and smoke test may all be carried out using this test point.
Table 16-4:
Control parameters updates
Level
Parameter
Function description
Display and input value
Settings
Group
Code
Default
Min.
Max.
Unit
I
21
02
Maximum outgoing water temperature in Heating
mode (Tm1)
45.0
23.0
60.0
0.5°C
Change to 'heat pump flow
temperature' (value of H1)
given in the hybrid calculator to
maximum of 55°C.
I
21
04
Minimum outdoor air temperature corresponding
to maximum outgoing water temperature (Te1)
-4
-20.0
50.0
0.5°C
Change to 'ambient design
temperature' (cell C11) given in
the hybrid calculator.
I
46
00
Backup heater type of function
0=disable
1=Replacement mode
2=Emergency mode
3=Supplementary mode
0
0
3
-
Change to 3 (supplementary
mode)*
I
46
01
Manual water set point
50.0
40.0
60.0
0.5°C
Change to parameter 2102 value
I
46
04
Heater activation delay time
5
0
900
1min
Change to 45.0
I
46
05
Integration time for starting heaters
600
0
900
°C×sec
Change to 0
I
46
10
Conditions to be available backup heaters
0=always enabled
1=depends on outdoor air temperature
1
0
1
-
Change to 0
I
51
46
Terminal 46: DHW electric heater or backup heater
0=DHW Electric heater
1=Backup heater
0
0
1
-
Change to 1
* When parameter 4600 is changed to 3, parameter 4700 (EHS type of function) becomes disabled.
The test point is not suitable for measuring boiler efficiency
or conventional flue draught.
NOTE
!
When using the test point on the cleaning cover note that the flue
gas temperature reading will be higher than that measured in the
flue thus resulting in an inaccurate efficiency reading. To obtain an
accurate flue gas temperature and efficiency, the reading can only
be measured outside through the low level flue terminal or the test
point on the conventional flue starter elbow when fitted - with all the
casing panels fitted.
16.12 Heat Pump
16.12.1 Heat Pump Control Parameter Settings
After the heat pump has been installed and connected to the oil
boiler, the control parameters given in Table 16-4 MUST be updated
before the hybrid system can be operated.
These are accessed via the Installer Menu on the Heat Pump
Remote Controller.
Refer to Section 9.5 of the Aerona³ Installation and Servicing
Instructions for details of how to access the Installer Menu.
16.12.2 Setting the Heat Pump flow temperature
Set the Heat Pump controller to this temperature using Parameter
21 02.
Refer to Section 3.7 of the Installation Instructions supplied with the
Grant Aerona³ heat pump for guidance on accessing and setting
heat pump parameters.
The factory default value for parameter 21 02 is 45°C. This must be
checked and re-set, if required, to give the required value (H1) as
indicated by the calculator.
Note: this can only be done after the Heat Pump has been installed.
Summary of Contents for Aerona3 Series
Page 57: ...Section 13 Flue System and Air Supply Page 57 Figure 13 8 Flue clearances...
Page 77: ...Section 19 Spare Parts Page 77 Figure 19 4 15 21kW baffles Figure 19 5 21 26kW baffles...
Page 84: ...Appendix A Page 84 Appendix A...
Page 85: ...Appendix A Page 85...
Page 86: ...Appendix A Page 86...
Page 87: ...Appendix A Page 87...
