elysator PUROTAP easy Installation and user guide

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Demineralised heating water
perfect for every system Installation
Function
Operation
Service
fast
efficient
safe
PUROTAP® easy
Minerals and salts in technical water circulations
lead to corrosion and mineral deposits.
PUROTAP filters aggressive materials out of
the water and enables trouble-free operation.
EN

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Content
Combat lime precipitation
Combat corrosion
According to current standards
The function
Connection variations system fill-up
Connection variations system cleaning
Operating the meter
Apparatus components
Change ion exchanger resin
Empty water
Repair malfunction
4
5
5
6
7
8
9
10
11
13
14
Updates may be made without notice.
Web version supercedes print version.
3 EN

°fH
5°
10°
20°
30°
35°
40°
45°
50°
25°
15°
3°
6°
11°
17°
20°
22°
25°
28°
14°
8°
°dH
0100 g 200 g 300 g 400 g 500 g
3
Amount of lime in 1 m of fill-up water
Total hardness °fH
Total hardness °dH
Amount of dissolved calcium carbonate (CaCO )
3
There are no compromises with use of desalinated (demineralised) water
when it comes to combating mineral deposits.
Completely desalinated water no longer contains any substances that can
damage or settle in boilers and heat exchangers.
The following table shows the amount of lime that accumulates as a result of
filling the heating system once with untreated water.
According to many manufacturer specifications and technical guidelines, fill-
up water must normally be desalinated (demineralised) for heating systems.
Practice has shown that modern devices such as wall-mounted gas boilers,
heat pumps and solar systems are damaged by lime precipitation even at lower
water hardness levels.
The larger the system capacity (e.g. storage tanks), the more lime is introduced
with the fill-up water.
3
With a hardness of 17 °dH (and/or 30 °fH), 300g of lime accumulates per m of
water. This is still approx. 100 g for a single family dwelling with 350 l of system
water content. This amount is more than enough to damage a modern high-
capacity heat exchanger.
in the boiler and heat exchanger
Combat lime precipitation
Better than softened water
By replacing the calcium and magnesium ions with sodium ions during soften-
ing, the hardness components are removed from the water but the salt con-
tent remains high and unchanged. This is a disadvantage for modern systems
with different metals in the system.
If guidelines recommend water softening, then this can be interpreted in such
a way that more weight is attributed to the prevention of lime scale at a specific
hardness than to the prevention of corrosion. This compromise is accepted
because softened water is probably available locally in regions with critically
high water hardness, whereas a complete desalination system is not.
Lime precipitation in the boiler
Overheating, stress crack
EN 4

Combat corrosion
According to current standards
Desalination also removes all neutral salts such as chloride, sulfate and nitrate
that are known for causing corrosion above a certain concentration and in a
specific interaction.
It has always been clear among experts that completely desalinated water is
perfectly suitable for the fill-up water in heating systems and thus, the service life
of all components is extended. Today this technology is very user-friendly and
affordable that it is ideal for practical application.
Since corrosion processes in closed heating systems mainly involve electrochemical
reactions, the electrical conductivity of the water plays a direct role in the rate of
these reactions.
The salt content of the water determines the electrical conductivity.
According to VDI guideline 2035, increasing amounts of oxygen are tolerated with
reducing water salt content.
When ions are present that can take over the transporting of electrical currents in the
water, the formation of galvanised elements that can lead to local corrosion
(corrosion elements) is practically impossible.
[Sheet 2, Para. 8.5.]
"Increasing amounts of oxygen are tolerated with
reducing water salt content. When ions are present
that can take over the transporting of electrical
currents in the water, the formation of galvanised
elements that can lead to local corrosion (corrosion
elements) is practically impossible."
[Sheet 2, Para. 8.5.]
When filling up larger warm water heating systems
for the first time, it is recommended that desalina-
ted water is used [...]
[Part 3, Para. 7.2]
Chloride and sulfate ions stimulate the anodic parti-
al reaction of metal corrosion. The corrosion proba-
bility for local corrosion can be reduced through
selective anion exchange.
[Para. 4 ff]
"Fill-up water and make-up water must be desalina-
ted."
[d]
"Demineralisation (complete desalination) is the
best technical solution for water with high chloride
or sulfate content."
2035, Prevention of damage
in water heating
installations, corrosion in
the water system.
DIN 50930 Corrosion of
metallic materials under
corrosion load by water
inside of tubes, tanks and
apparatus
BT102-01, Water quality for
building services
engineering systems
VDI (German
Associations of
Engineers)
DIN German
Institute for
Standardisation
SWKI Swiss
Society of
Heating and Air
Conditioning
Engineers
Authority: Guideline/Standard: Citation:
Corrosion rate
Salinity in the water
Corrosion pittings for high levels
of salt
5 EN

Heating and cooling systems use water as a medium for heat transfer. The water circulates from where the
warm water is generated to the user and back. Even if the system always re-uses the same water, lime and
aggressive materials enter the closed water system when first filling the system, which can damage modern
components.
The filling apparatus filters lime and aggressive dissolved substances such as sulfate, nitrate and chloride out
of the fill-up water. The device operates on the basis of a mixed bed ion exchanger and provides demi-
neralised water that has been completely desalinated. Thus, damage caused by lime and corrosion can be
effectively prevented in the heating system.
The filling apparatus is equipped with precise meters for monitoring pure water production in terms of qua-
lity and quantity.
This method does not release any chemical additives into the water.
The device operates without an external power supply.
If the ion exchange capacity is exhausted, then the ion exchange resin can be easily replaced and disposed of
with the household waste.
Protective
measures:
Only trained personnel should use the filling apparatus.
Operating specifications must be adhered to according to this manual.
Local guidelines are to be followed for the connection between sanitary and heating sys-
tems. The device already has a returnvalve. In the DIN EN 1717 (Germany) field of
application, a pipe disconnector must also be installed before the fill-up station.
The system is not suitable for unmonitored, permanent connection under pressure. The
valves in the input and output are to be kept closed and only to be opened for the dura-
tion of the system filling.
Even demineralised water contains dissolved gasses, including oxygen and carbon diox-
ide that can cause the beginning of a corrosion process. The gases are purged by heating
the water, therefore we recommend carrying out a heating test run for the system as
soon as possible after fill-up.
The function
According to the latest standards
Leading boiler manufacturers and component suppliers approve and recommend the procedure for purging
make-up water via the ion exchanger.
The demineralised make-up water as a result of desalination also fulfills the requirements for heater fill-up
water quality according to VDI guideline 2035 (Association of German Engineers), the SWKI guideline
BT 102-01 (Swiss Heating and Air Conditioning Engineers) and the Ö-Norm H5195.
6 EN

Cold water
Inlet
Outlet
Flow
Return
Boiler
Drain and
feed cock
Connection variations system fill-up
This connection variation is suitable for directly filling heaters with demineralised water.
This connection variety is not suitable for area heating systems that can only be deaerated through purg-
ing. The delivery rate of the ion exchanger is not sufficient enough to purge air from a horizontal line. In
these cases, we recommend fill-up with untreated water and subsequently demineralise via a cleaning
system (see following page).
The inlet for untreated water is under the connection of the apparatus valve, the outlet for the deminera-
lised water for the heating system is on top on the other side of the safety sieve.
The apparatus contains a non-return valve. When the connections are turned, the untreated water can-
not flow through the apparatus.
In the DIN EN 1717 (Germany) field of application, a pipe disconnector must also be installed
before the fill-up station. Follow the guidelines from the water supply company.
PUROTAP contains mechanisms for automatic stop. If the system fill-up is not constantly moni-
tored, then a pressure-reducing valve needs to be installed so that the heating system is not
damaged by over pressure at the end of fill-up.
PUROTAP easy may only be under pressure for the duration of filling.
Temp. max. 60 °C, pressure max. 6 bar.
7 EN

Inlet
Outlet
Main distribution
Flow Flow
Return
Return
Pump
Reinforced hose pressure side
Directly filling via the ion exchanger is not suitable for area heating systems that can only be deaerated
through purging. The delivery rate is not sufficient enough to purge air from a horizontal line. In these
cases, we recommend fill-up with untreated water and subsequently demineralise via a cleaning system.
This procedure is also suitable for demineralising systems with too much salt content according to the
boiler manufacturer's specifications or guidelines later.
Thereby, the ion exchanger is integrated into the heating system circulation with the help of a separate
pump (e.g. jet pump, impeller pump, centrifugal pump) and two reinforced hoses. Hereby, it is of less
importance which adapter is used; instead, it is more important that circulation pumps are operating and
all valves are open and a good mixture of the system water is possible.
The apparatus meter indicates if the resin is exhausted. The system water demineralisation progress can
only be determined during cleaning with a second meter and via sampling.
The apparatus contains a non-return valve. When the connections are turned, the untreated water cannot
flow through the apparatus.
PUROTAP easy is to be connected to the pressure side of the auxiliary pump.
If this cleaning variation is conducted during heating operation, then the apparatus temperature
may only reach a maximum of 60 °C for a short time. The apparatus is to be connected to the
return line with the lowest temperature possible.
Hoses that are sufficiently pressure and temperature resistant are to be used (reinforced hoses).
The ion exchanger may not be under pressure without monitoring.
Connection variations system cleaning
8 EN

3 x AAA
Recommended limit value:
33 TDS/50 µS, if this is
exceeded then the resin
needs to be replaced
9 EN
Set limit for
warning
Limit
Reset
meter
Flow rate
ON/OFF
Total litres treated
Select either
TDS/µS
Automatic quality monitor
Display:
Keys:
Limit warning signal
Operating the combined meter
Changing the batteries
The combined meter is battery-operated. It measures the flow rate in l/min, the total volume in litres and
the concentration of dissolved minerals, either in microsiemens or TDS. In addition, a limit can be set for the
maximum concentration of minerals tolerated in the demineralised water (appliance outlet). The limit and
overall total can both be reset.
Change the batteries when the battery warning symbol
appears or the display is faint or blank. Undo the 4 screws
on the front and carefully open the device. Change the
batteries. 3 x AAA.
Each time you touch this key, the boundary value is raised by 6/7 TDS or by 10 µS/cm. Holding down the key
for 3 seconds resets the boundary value to zero. Programming the boundary value serves as a warning as to
when the ion exchanger resin is exhausted.
This key can be used to switch at any time between the TDS unit of measurement (Total Dissolved Solids)
and electrical conductivity. Both are used to measure the concentration of dissolved minerals in the water.
Most European component manufacturers use the µS/cm unit of measurement (microsiemens).
The water hardness at the outlet of the refill appliance can be calculated using the following rule of thumb:
1 °fH equals approx. 20 µS/cm; 1 °dH equals approx. 35 µS/cm.
1
2
If the ON key is pressed once, the water quality is measured for 10 seconds and compared to the set limit.
The measured value is shown. If it is above the limit, the LED glows red; if it is below, the LED glows green
while the measurement is being taken. If required, the measurement can be repeated manually.
Auto mode: If the ON key is pressed for a second time, the combined meter begins automatic monitoring.
The eye symbol appears to indicate that monitoring has been enabled. In auto mode, the meter only takes
measurements when water is actually passing over it. If the water draw-off is interrupted, the meter
continues to show the last captured value. While water is being drawn off, the combined meter measures
the water quality every 40 litres. If the limit is exceeded in two successive measurements, the display
continuously flashes red. This indicates that the ion exchange resin is spent and needs replacing. If the ON
key is pressed for a third time, the meter exits auto mode.
3
Pressing the reset key for 3 seconds resets the overall total on the meter. This is recommended every time
the resin is replaced, as it gives a reference point for the remaining capacity of the ion exchange resin.
4

0 l
500 l
1'000 l
1'500 l
2'000 l
2’500 l
3’000 l
3'500 l
4’000 l
4’500 l
5’000 l
°fH °dH
5°
10°
20°
30°
35°
40°
45°
50°
25°
15°
3
35 m à 1°fH 3
20 m à 1 °dH
3°
6°
11°
17°
20°
22°
25°
28°
14°
8°
Why the capacity calculation?
1. In order to know the amount of
resin needed for the demineralisation
of the system water.
2. In order to know the capacity of a
resin fill-up that does not have to be
monitored.
The capacity (range) of the ion
exchanger resin is dependant on
water hardness. It can be referred to
from the adjacent table, or calculated
with the capacity figure of the resin
amount. PUROTAP easy resin filling
3
has a capacity of 35 m at 1°fH, and/or
3
20 m at 1°dH.
The number 20 is used for German
hardness grades and this is divided by
the water hardness in °dH. The num-
ber 35 is used for French hardness
grades and this is divided by the water
hardness in °fH. The result is the resin
capacity in cubic metres of water.
Example: with a water hardness of
e.g. 20 °dH, the capacity range of the
3
resin amounts to exactly 1 m (1,000 l)
of demineralised water.
Calculating the
capacity
Capacity
Litres of demineralised (completely desalinated) water per
cartridge
Screw head for
resin exchange
Chrome steel,
inline coated
load up to
6 bar, 60°C
Inlet
Non-return valve
Safety sieve
Outlet
Handle
Measuring computer
Calculating the capacity
Apparatus components
Weight 18 kg.
ready for operation
10 EN

1. Unscrew the head from the bottle and pull out.
2. Loosen the cap from the drain nipple on the bottom of the bottle.
3. Pull the catch sack for emptying over the resin container.
Connect the drain valve (accessories) or the water hose directly on the bottom of the resin
container.
4. Shake the resin in the catch sack and rinse the residue resin in the sack with fresh water via the
drain valve.
Dispose of the used resin with the catch sack with the household rubbish.
Drain valve (accessories)
Fresh water
a) Empty used resin
If the content of dissolved solids in treated water increases over 30 TDS and or 45 µS (approx. 2 °fH)
according to the meter, then the resin needs to be changed. We first recommend that the water supply is
shut-off shortly, shake the cartridge and then slowly turn the water supply back on and fill-up. Thus the
remnant capacity can be as exhausted as possible. Even the flow rate restriction is improves the use of the
remnant capacity.
Change ion exchanger resin
11 EN

b) Fill with new resin
1. Screw the cap back on the bottom of the resin container for fill-up.
2. Cut the corner of the resin sack open and fill the resin in.
Only use original mixed resin.
3. Screw the head back on, check the o-ring and the sealing face for tightness and cleanliness.
Check to make sure that the insert prove is secure during each resin change.
Check to make sure that the insert prove is secure during each resin change.
The resin granulate is to be stored in a moist place and this is the reason why it is delivered in
sealed plastic bags. Once the bags are opened, use the resin immediately. The resin can be stored
in a cool dark place for up to 12 months. There is the risk of capacity loss and bacteria formation if
now correctly stored.
12 EN

In order to reduces the weight of the apparatus during operation-ready status and in order to prevent frost
damages in winter, we recommend that the water is emptied after use.
Empty water
1. Loosen the cap on the bottom of the bottle.
Draining contains a fine sieve, so that resin cannot leak out.
Check that the fine sieve is correctly installed.
2. Turn PUROTAP easy and let water drain out.
3. Replace cap.
13 EN

3 x AAA
The meter display goes off after
approx. 10 seconds.
A display or battery symbol
does not appear
The automatic shut-off of the meter serves to conserve the
batteries. In manual mode, the ON button much be pressed
for each measurement. Alternatively, auto mode can be
used (press the ON button two times), then each of the last
measuring values are permanently displayed.
Change batteries.
Loosen screws on
the front.
Carefully remove the front of
the meter and replace the
batteries.
Repair malfunction
14 EN

The flow is weak despite the
unrestricted supply line
The apparatus has 2 fine sieves for preventing ion exchanger resin
from leaking into the heating system.
Check the fine sieve in the outlet and on the immersion hose regu-
larly.
Plastic - ring pressed in
Stainless steel sieve
Immersion hose fine sieve
The resin appears to be used
faster than calculated
There probably is not a malfunction, instead the untreated water
contains dissolved solids (sulfate, nitrate, chloride) in addition to
lime, which are removed and thus reduces the capacity.
15 EN