8.4
Cleaning the air duct
•
Take care to ensure that the air inlet and exhaust
openings are freely accessible and not blocked by
objects or dirt.
•
Likewise check protective grilles to ensure they are clean.
This also applies to any exhaust ducts that are present.
•
The inlet and exhaust air grilles and the evaporator
must be checked for dirt regularly, and cleaned when
necessary (see image below). The top cover can be
removed to clean the evaporator.
Caution:
Unplug the power cord before opening
Evaporator
Refrigerant circuit:
Work on the internal circuit of the heat
pump (compressor, condenser, evaporator,
expansion valve etc. and including the
circuit pipework) may only be carried out
by authorised persons.
8.5
Service
Important:
Unplug the power cord before carrying
out any work on the unit!
Shut-down
The heat pump can be shut down by switching off the
calorifier/heat pump at the control panel (see Operation).
8.
Operation/maintenance/service
8.1
Operation and maintenance
To ensure problem-free operation, a yearly check should
be carried out.
8.2
General checks
To detect possible irregularities in its operation, the heat
pump should be visually inspected at regular intervals.
•
Keep the unit casing and the area around the unit clean.
•
Wipe the installation regularly with a damp cloth to
remove dust and contamination. In this way, leakage
points are identified sooner and can be repaired.
•
From time to time, check that all connections are secure.
•
From time to time, check that the operating voltage and
phase unbalance are still within the specified limits.
•
Performance checks
The temperature difference between the air intake
and the air outlet should be approx. 5-7 K. Larger
temperature differences indicate reduced air flow rate
(check supply and exhaust ducts); a difference below
4 K indicates that the heat pump is not functioning
correctly (notify customer service).
Important
The hot water storage tank is coated with a double layer
of enamel on the inside.
The tank coating is designed for normal drinking water
quality. If the aggressiveness of the drinking water used
is above average, no guarantee can be given unless
special protective measures are taken.
8.3
Magnesium protection anode
The magnesium protection anode must
be checked 2 years after commissioning
at the latest.
The subsequent control intervals are then
set depending on the condition of the
anode at the first check.
In areas with a high chalk content (over 16°dH or 28°f
respectively), a check should be made after 2-3 years.
Ask your heating engineer or Hoval Customer Service.
13
4 215 949 / 00
OPerATIOn/MAInTenAnCe/ServICe