6
Chapter 3 |
Hot Water Storage Tank with Coil
WTB 220-400
Installation
Protection against overpressure shall be made in ac-
cordance with the relevant regulations in force.
Connect the storage tank to the water supply sys-
tem of water pressure at least 1 bar and max 10 bar
(WTB220 up to 6 bar) (see Table 6 Technical data).
and to the heating systems where parameters of the
heating medium may not exceed the allowable op-
erating conditions of the coil (see Table 6 Technical
data). Install a pressure reducer if the pressure at the
cold water inlet to the tank is higher than allowed.
Connect the heating and water supply systems in ac-
cordance with the installation diagram (see Fig. 7).
Pressure increases during heating the water in the
storage tank. Therefore, the appropriate safety valve
must be installed in each storage tank, at the cold
water inlet that will protect the storage tank against
overpressure. During heating the water, small and
temporary water fl ow from the safety valve can oc-
cur, which indicates that the pressure has increased
above the rated value, which triggered the valve. This
may in no way be prevented. Blocked safety valve
can cause equipment failure. Drain the outfl ow from
the safety valve to the sewerage or drain grate. The
safety valve outfl ow line should be installed with a
slope and be protected against water freeze, and it
should remain open to the atmosphere. The manu-
facturer is not responsible for fl ooding the room as a
result of the valve operation.
Fig. 6
Housing and thermal insulation disassembly.
Installation Requirements
1
2
3
4
5
6
NOTE
We recommend installing a strainer in order
to protect the pumps, check valve and the
components of the heating system.
NOTE
In order to minimize the fl ow of water from
the safety valve associated with the thermal
expansion of the liquid, it is advisable to in-
stall a suitable expansion vessel at the cold
water connection (see Fig. 7 item CM1.)
Caution
Installation and commissioning of the storage
tank shall only be done by appropriately quali-
fi ed installer. The installer should inform the
user of the functions of the product and provi-
de the necessary information on its safe use.
Caution
Never use the equipment with clogged safety
valves.
Caution
When heating water, slight, temporary di-
scharge from the safety valve can occur. This
is a correct safety valve function. Any attempt
to interfere in its operation can lead to the
danger and destruction of the storage tank.
Caution
Never block the safety valve or drain line. This
can cause a dangerous overpressure in the
storage tank.
Caution
Installation of necking of any kind (such as re-
ducers, dirt pockets, etc.) and cut-off valves
between the storage tank and the safety
valve is not allowed. Only a T-pipe with a drain
valve and a T-pipe with an expansion vessel
may be installed in these line sections.
Caution
Installation of the appropriate safety valve in
the cold water supply line protecting the unit
against overpressure is mandatory!