Technical Data; Assembly - fothermo PVB-30-AC Bedienungsanleitung

not replaceable. It is necessary for the display
to function at night. A defect does not limit the
basic functionality.
• This unit may be operated up to an altitude of
4 000 m above sea level.
• Reheat Function is optional. You can either only
use PV-energy or PV-energy combined with re-
heat-power.

TECHNICAL DATA

This water heater can provide hot water from the
public water supply system for several consumers.
The water used for heating must comply with the
requirements in the normative documents for do-
mestic water, in particular: Chloride content up to
250 mg/l; electrical conductivity more than 100 μS/
cm, pH value 6,5-8 for enamelled hot water tanks.
The thermal insulation consists of CFC-free poly-
urethane foam.
The maximum electrical power with PV-energy of
the water heater is 550 W. The actual power con-
sumption of the heating element depends on the
connected photovoltaic power as well as on the
radiation strength provided by the sun. The water
is heated to a maximum of 65 °C to ensure scalding
protection. Detailed information can be found in the
data sheet or on the nameplate. In addition to the
photovoltaic power, an external reheating with 1,5
kW can be connected. The minimum temperature
can be set with a rotary control.
The water heaters are equipped with a combined
check and pressure relief valve (Table 1, No. 5) to pre-
vent overpressure during appliance operation. The
water tanks are made of steel with a high-strength
enamel coating and additional cathode protection
provided by a magnesium anode.

ASSEMBLY

The water heater can be installed only in normal
fire safeguarded premises and where temperature
cannot fall under 0 °C. The availability of a siphon
on the installation for waste waters as during normal
usage of the water heater, water may leak from the
safety valve aperture. At the same time the siphon
will facilitate the water tank maintenance, preven-
tion and servicing operations when water needs to
be drained out of the water tank.
When selecting a suitable installation location for
the water heater, the following must be considered:
• Wall type and material,
• dimensions of the unit,
• mounting type,
•
arrangement of the fastening elements for wall
mounting,
• arrangement of the pipes and the degree of
protection against water leakage.
The appliance must be mounted where it is protec-
ted against water dispersion or water pouring over.
In order to reduce heat loss it is recommended to
keep minimum distance between the heater and the
places where the hot water is used. If you purchased
a water heater with factory-fitted power cord with
plug, the unit cannot be installed in a wet premise!
The location of the device must comply with the
requirements for the electric installation and its con-
tact. It is obligatory that there are spaces provided
between the appliance and the surrounding walls
and the ceiling of the premise, as follow:
• For vertical water heaters – at least 70 mm bet-
ween the appliance and the ceiling; at least 50
mm between the appliance and the side wall; at
least 350 mm below the appliance to facilitate
servicing and possible repair.
The water heater should be installed steadily on the
wall of the premises. For this purpose steel bolts
(studs), tightly fixed in the wall, with diameter 10-12
mm are used. The fixing elements should be se-
cured against pulling aside the wall – they should
be anchor or passage bolts (depending of the wall
construction material). It is recommended that the
elements on which the heater will be suspended are
designed for three times greater loads than the ap-
pliance total weight and located in the water therein.
Installation of the water heater on decorative walls
(made of single bricks or of other light materials) is
strictly forbidden. On Fig. 1,2,3,7 and in the tables
are shown the distances between the bolts (studs)
for mounting the units. Vertical water heaters of 150
liters are equipped with special type of suspension
plates and correspondingly the distance between
the bolts (studs) differs from that of other models
and modifications.
WARNING! The bearing plates of horizontal water
heaters must be securely clamped to the premise
wall. Under the bolts heads (nuts on studs) must be
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