9
4 209 973 / 00
Operation/ Maintenance/ Service
Is your heating and hot
water plant working reli-
ably and economically
over the long run?
Regular maintenance
and ongoing checks
and care of all important
components ensure it
stays that way!
Work described in the op-
erating instructions should
be carried out from start
up onwards, not just after
the warranty has expired.
Your installer will gladly advise you.
Hoval service is recommended for the
following tasks, either as one-off orders
or as part of a service contract: Check-
ing the heat pump, the water heater, the
boiler, the regulators and the circulation
pump
Hoval service specialists are properly
equipped and can offer you a reliable
service.
If you want to place an order, please call
the regional service manager; he co-op-
erates closely with local service special-
ists. This enables us to visit you quickly.
If you cannot keep the heating working
properly by making manual adjustments,
we are will be with you within hours. In
all other cases we will visit within five
working days (see also page 3).
The invoice is calculated on the basis
of materials used and labour time, while
our maintenance work is carried out at
reasonable flat rates.
Travelling and labour are charged ac-
cording to the guidelines laid down by
the professional associations. When
placing your order, ask the manager for
a verbal guideline offer for material and
labor costs.
Operation and maintenance
To ensure problem free operation, a
yearly check should be carried out.
General checks
To detect possible irregularities in its
operation, the heat pump should be
checked out at regular intervals.
• Keep the housing of the equipment
clean, and the area around it.
• I Regularly wipe the installation with a
damp cloth, to remove dust and dirt.
This makes it easier to find any leaks
early on, so they can be repaired.
• From time to time check all connec-
tions to ensure they are tight.
• From time to time check to ensure that
the operating voltage and phase ir-
regularity remains within the specified
limits.
• Performance monitoring
The temperature difference between
the inlet air and exhaust air should be
approximately 5-7K. Greater tempera-
ture differences point towards prob-
lems in air throughput (check both inlet
and exhaust air flow), whereas differ-
ences smaller than 4K indicate that the
heat pump is not functioning correctly
(inform customer service)
Important
The hot water tank is equipped with a
double enamelled wall. The coating of
the reservoir is designed for normal
drinking water quality. If drinking water of
above average aggressivity is used with-
out any special protection measures be-
ing taken, no guarantees can be given.
The protective anode should be
regularly checked and if neces-
sary exchanged by your installer or
Hoval customer service. This is a
condition of the guarantee.
In hard water areas (over 16° dH or 28°
fH), every two or three years a check
should be carried out. Ask your heating
specialist or Hoval customer service.
Cleaning the air duct
• Take care to ensure that the air inlet
and exhaust openings are free and not
blocked by objects or dirt.
• Protective grilles and air filters should
also be checked for their cleanliness.
This also applies any air ducts present.
Service
Important
When any work is being caried out on
the equipment, the mains plug should be
pulled out
Shut
The heat pump can be shut down
by switching off the water heating
heat pump on the control panel (see
Operation).
?
•
The inlet and outlet screens and the
evaporator must be checked for dirt
regularly, and cleaned when neces-
sary. (See picture below.) The top
cover can be removed to clean the
evaporator.
Caution! Unplug the power cord be-
fore opening
evaporator
Working fluid (refrigerant) circulat
Work on the internal circulation of the
heat pump (compressor, condenser,
evaporator, expansion valve etc.,inclu-
ding the circulation pipe work) may
only be carried out by authorised
persons
Bern
Feldmeilen
Crissiere
Manno
Basel/Füllinsdorf
Vaduz
Operation/ Maintenance/ Service
