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TIP
When connecting the buffer tank to a closed C/H
system, you have to install an additional or incre-
ase capacity of the existing expansion vessel.
CAUTION
In closed systems, use of a safety with blo-
w-off pressure not exceeding the max ope-
rating pressure of the unit is mandatory (for
the max operating pressures of the units, see
Table 1 Technical data.)
CAUTION
Water can drip from the safety valve, which
is normal and you should never prevent it,
since blocking of the safety valve can cause
a threat to the user's safety.
CAUTION
Installation of necking of any kind (such as
reducers, dirt pockets, cut-off valves, etc.)
between the safety valve or open expansion
tank and the buffer 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
Never use the equipment with clogged safety
valves.
CAUTION
Check the operation of the safety valve pe-
riodically as described by the manufacturer
of the valve in order to check whether it is
not clogged.
TIP
The lower return connections to the heating
source and from the heating system can be
connected in opposite confi guration.
TIP
We recommend connecting the tank connector
pipes with the system lines by means of unions
to allow disconnection of the tank, if required.
Buffer tanks
UKV 20-40, UKV 20-100
2
supply from
the heat
source
4
to sewerage
2
3
return to the
heat source
5
Fig.9 Diagram of the UKV 20-100 buffer tank installa-
tion in a closed system.
DESCRIPTION:
1. Buffer tank
2. Cut-off valve
3. Drain valve
4. Safety valve
5. Expansion vessel
CAUTION
The storage tank connections may not be
made of materials more precious than car-
bon steel due to the increased electrochemi-
cal corrosion. This applies to connector pi-
pes (fi ttings) contacting the tank connector
pipe thread. Preferably, use galvanized con-
nector pipes (fi ttings.)
Installation of the Temperature
Sensor (only UKV 20-100)
UKV 20-100 buffer tanks have enclosure for the tem-
perture sensor. In order to install the temperature
sensor (Fig. 10):
1. Remove the screws securing the enclosure co-
ver. (1)
2. Remove the enclosure cover together with ther-
mal insulation. (1)
3. Drill a hole in the cover to enable insertion of the
temperature sensor. (2)
4. Insert the sensor through the cover, and into the
temperature sensor cover. (3)
5. Reinstall the enclosure cover together with ther-
mal insulation.
Chapter 3 |
2
heating
system
supply
1
2
return from the
heating system
Installation
7
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