Condensate Disposal; Heating System Connections; Heat Pump Controls; Refrigerant - Grant Aerona 290 Installation & Operating Instructions Manual

10.2.2 HEATING SYSTEM
Check the following:
• Expansion vessel pressure
• Operation of pressure relief valve
• Heating system pressure – top up if necessary
• Correct concentration of corrosion inhibitor/biocide protection
• Heating and hot water controls settings
• Any leaks on system
• Magnetic filter is cleaned
The following checks must be performed at least once a year by a
qualified person:
Inspect system expansion vessel
• Check expansion vessel charge and re-pressurise as
required.
Inspect system pressure relief valve
• Check for correct operation of the pressure relief valve by
turning the black knob on the valve anticlockwise.
Inspect pressure relief valve discharge pipe
• Check that the outlet of the pressure relief valve discharge
pipe is positioned correctly, is unobstructed and water is seen
to flow out when the pressure relief valve is tested, as above.
Check heating system water pressure
• If it is below 1 bar, top-up the water in the system.
Inspect the Magnetic filter
• Check and clean the water filter following the manufacturer's
instructions.
10.3

CONDENSATE DISPOSAL

Check that the condensate drain holes in the bottom of the heat
pump are not blocked.
10.4

HEATING SYSTEM CONNECTIONS

Check the condition of the flexible hoses. Replace if damaged or
leaking. Check the presence and condition of the pipe insulation.
10.5

HEAT PUMP CONTROLS

Check that settings on the Grant Aerona Smart Controller are as
set when commissioned.
Reset to commissioned settings if necessary.
For information relating to the commissioning requirements of
the Grant Aerona Smart controller, refer to Appendix G of your
supplied manual:
• DOC 0203 - for systems without Grant QR pre-plumbed
cylinder
• DOC 0205 - for systems with Grant QR Smart pre-plumbed
cylinder
10.6

REFRIGERANT

R290 is a propane gas with a purity of at least 99.5%. The gas is
odourless so a leak would not be noticed by the sense of smell.
! WARNING !
R290 is classed as a hazardous substance and all
technicians must ensure to have an appropriate level of
safety awareness regardless of whether they handle the
refrigerant or not.
Under no circumstances should the refrigerant be vented from the
charging points on the refrigerant circuit of the heat pump.
If any work is required to be carried out on the refrigerant circuit,
it MUST be undertaken by an F-gas registered refrigeration
engineer.
On no account should any such work be carried out by unqualified
personnel.
Page 44
10.7

HEAT PUMP MONITORING

The heat pump operating conditions can be displayed via the
touchscreen display of the Grant Aerona Smart Controller.
For information relating to the Heat pump accessibility on the
Grant Aerona Smart controller, refer to Section 9 of your supplied
manual:
• DOC 0203 - for systems without Grant QR pre-plumbed
cylinder
• DOC 0205 - for systems with Grant QR Smart pre-plumbed
cylinder
10.8

MAINTENANCE AND SERVICE

In order to ensure optimal availability of the unit, a number of
checks and inspections on the unit and the field wiring have to be
carried out at regular intervals.
This maintenance needs to be carried out by your local technician.
! WARNING !
ELECTRIC SHOCK
Before carrying out any maintenance or repair
•
activities, switch off the power supply on the supply
panel.
• DO not touch any live components or connections for
at least 10 minutes after the power supply is turned off.
• Note that the crankcase heater of the compressor may
operate even in standby mode.
• Some sections of the electric component box may be
hot.
• Avoid touching any conductive parts.
Do not rinse the unit with water as it may cause electric
shock or fire.
Do not leave the unit unattended when the service panel is
removed
Section 10: Servicing