hajdu PT Series, Usage Instructions

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15
DEAR BUYER,
Depending on their layouts,
buffer tanks can be operated
from several different energy
sources: indirectly from solar
energy, or gas-based, coal-
based or other based energy
carriers (i.e. auxiliary electric
heating). Paying attention to
these usage instructions, you are
kindly asked to turn to a profes-
sional technician to perform the
connection of the appliance in
the heating circuit and to put
into operation the appliance for
the first time. Please read these
installation and operation in-
structions carefully and follow
the instructions precisely. In this
manner, you can ensure that
your unit will operate in a relia-
ble way during a long time.
STRUCTURE AND OPERATION
The buffer tanks are composed
of a steel tank, foamed polysty-
rene insulation, PS sheath and a
cover. The tank and the heating
pipe coil are made of St37-2
steel.
As the internal surface of
buffer tanks contain no cor-
rosion protection, they can
only be filled up with heating
water. They are not ade-
quate for storing drinking
water!
The insulation of the tanks is
polystyrene (with graphite) foam
of thickness of max. 110 mm;
and their sheath is made of plas-
tic. Both the sheath and the
insulation are mountable (over
500 liter capacity), so the tank
can be fixed into its operation
position through their removal
(as well). Without its insulation,
the largest tank can be carried
through the door of size 800 mm.
Combined buffer tanks (PT_CF) pro-
vide sanitary hot water in an instan-
taneous way, heating cold water
through the wall of the flexible pipe
of stainless steel. However, a simple
buffer tank system (PT) combined
with an indirect tank is also able to
produce hot water, either directly
from the heat production unit or from
energy gained from the buffer tank.
The foamed polystyrene surrounding
the internal tank keeps the water at
given temperature for a long time,
without any energy intake.
Type selection:
Buffer tanks are sold in standing
forms, with volumes of 300, 500, 750
and 1000 litres, in “empty” (PT) ,
“pipe coil” (PT_C) and “combined”
(PT_CF) layouts. “Empty” buffer
tanks (PT types) contain 9 pipe
branches for connection of heat pro-
ducing units and heat expenditure
units and they contain 1/2” sensor
pipe branches. Buffer tanks with pipe
coil (PT_C types) contain a heat ex-
changer for direct connection of solar
systems or systems with heat pump.
In addition to features described
above, combined tanks (PT…CF
types) contain a flexible pipe of stain-
less steel to produce sanitary hot
water. The most important external
and connection sizes of the applianc-
es are described in Table 1 and in
Figures 1 and 2 below.
Operation target
Buffer tanks work as energy storages
for heating systems. They balance
timely discrepancies between heat
production (or available energy) and
heat need, thus ensuring convenienc-
es.