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8.2
Heat Pump
Any work on the refrigerant circuit
must be carried out by a qualified
!
professional with an F Gas Category 1
certificate of aptitude.
It is strictly prohibited to release re-
frigerant into the atmosphere. The re-
!
frigerant must be collected before any
work is carried out on the circuit.
1.
Remove insulation from ducting as well as the
ducting itself and thus remove the hood from the
unit as per figure 18 to expose the compressor,
heat exchanger etc.
2.
Check the compressor for ice formation.
3.
Check the circuit for leak-tightness by carrying
out a test of the refrigeration components with an
appropriate R290 sniffer.
4.
Check whether the components of the refrigerant
circuit show any signs of rust or traces of oil.
5.
Check the unit's components for wear or defective
items.
6.
Inspect for build-up of debris in ducting and hood,
remove if necessary.
7.
The heat exchanger should be examined for dirt
and dust and cleaned with warm water carefully
to avoid damaging the fins. Make sure that the
air can circulate between the fins and around the
product.
8.
Check that the cables are securely seated on the
connection terminals.
9.
Check that the fan runs freely.
Figure 18: Hood removal
8.3
Air intake & Exhaust
1.
Both the exhaust and air intake vents must be
inspected and cleared of any debris stuck in the
vents.
2.
Ensure the evaporator is checked at least once a
year, more depending on the cleanliness of the air
8.4
Heat Pump Condensation
1.
To check that condensation is draining correctly:
-
Remove upper cover (see Figure 15).
-
Check for blockages in the drainage hole.
-
Clean the condensate recovery container, where
deposits from air intake may have gathered.
-
Clean the flexible draining hose.
2.
The pressure limiting device must be switched
on regularly to eliminate limescale and check for
blockages.
3.
Check that all hydraulic connections on the heat
pump water heater are watertight.
4.
The condensate drain should be inspected to en-
sure the red plug has been removed and unre-
stricted draining of condensation is allowed.
8.5
Electrical Connections
Incorrectly made electrical connections can result in
over-heating and hence a fire risk. When installing or ser-
vicing the product, please ensure the wiring is adequate
to minimise risk of overheating. Please ensure you have:
1.
Remove the dust from power supply connections.
2.
Used the correct type and cross-sectional area ca-
ble to meet manufacturer and Wiring Regulation
requirements.
3.
When stripping the insulation from the individual
conductors, taken care to not damage the strands
of the conductor wire, which would reduce the
cross-sectional area of the conductor.
4.
Ensured the conductors are tightly and securely
connected to the controls or immersion heater
5.
Ensured the bared conductors are correctly in-
serted into the terminals, to avoid bearing on the
insulation sleeving or only partially clamping the
conductors.
6.
Securely anchored the supply cable using the
means provided to avoid exerting any external
strain to the cable and hence to the terminals.
7.
Checked to ensure the product is earthed correct-
ly; the Live and Neutral connections are to the
correct terminals, and the Residual Current Device
(RCD) operates correctly.
8.
Regularly checked the electrical connections as
part of the maintenance schedule, to ensure the
wires remain in good condition and terminations
remain secure. Ensure any spare parts used dur-
ing maintenance of the product are an authorised
spare part and meet the manufacturers' require-
ments.
Waste electrical product should not
be disposed of with household waste.
Please recycle where facilities exist.
Check with your Local Authority or
retailer for recycling advice.
Maintenance
23
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