PAW HeatBloC K35 DN 25 User manual

PAW GmbH & Co. KG
Böcklerstr. 11, D-31789 Hameln, Germany
Phone: [phone], Fax: [phone]
E-mail: [email protected], Web: www.paw.eu
2017/01 9936093x-mub-en –V01 1
Installation and Operation Instructions
HeatBloC K35 DN 25
with 3-temperature mixing valve

1General Information
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Contents
1General Information.........................................................................................................3
1.1 Scope of these instructions .......................................................................................... 3
1.2 Designated use ............................................................................................................ 3
2Safety instructions ...........................................................................................................4
3Product description..........................................................................................................5
3.1 Equipment.................................................................................................................... 5
3.2 Function ....................................................................................................................... 6
3.2.1 3-temperature mixing valve [specialist].................................................................. 7
3.2.2 Change of the flow line [specialist] ........................................................................ 8
3.2.3 Check valve and non-return valve [specialist]...................................................... 11
3.3 Accessories: Actuator (optional)................................................................................. 12
4Assembly and installation [specialist]..............................................................................13
4.1 Accessories: Cutting-ring compression fitting (not included in the scope of delivery).. 13
4.2 Installation of the HeatBloC........................................................................................ 14
5Scope of delivery [specialist]..........................................................................................16
6Technical data...............................................................................................................18
6.1 Pressure drop and pump characteristic curve............................................................. 19
Item no. 9936093x-mub-en - Version V01 –Issued 2017/01
Translation of the original instructions
We reserve the right to make technical changes without notice!
Printed in Germany –Copyright by PAW GmbH & Co. KG
PAW GmbH & Co. KG
Böcklerstraße 11
D - 31789 Hameln, Germany

1General Information
2017/01 9936093x-mub-en –V01 3
1General Information
Carefully read these instructions before installation and commissioning.
Save these instructions in the vicinity of the installation for future reference.
1.1 Scope of these instructions
These instructions describe the installation, commissioning, function and the operation of
the HeatBloC K35 DN 25 with 3-temperature mixing valve.
For other components of the installation, such as the pump, the controller or the modular
distribution manifold, please observe the instructions of the corresponding manufacturer.
The chapters called [specialist] are intended for specialists only.
1.2 Designated use
The HeatBloC may only be used in heating circuits taking into consideration the technical
limit values indicated in these instructions.
The HeatBloC must not be used in drinking water applications.
Improper usage of the HeatBloC excludes any liability claims.
This product complies with the relevant directives and is therefore labelled with the CE mark.
The Declaration of Conformity is available upon request, please contact the manufacturer.
Only use PAW accessories with the HeatBloC.
The wrapping materials are made of recyclable materials and can be disposed of
with recyclable materials.

2Safety instructions
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2Safety instructions
The installation and commissioning as well as the connection of electrical components require
technical knowledge commensurate with a recognised vocational qualification as a fitter for
plumbing, heating and air conditioning technology, or a profession requiring a comparable
level of knowledge [specialist].
The following must be observed during installation and commissioning:
relevant local and national regulations
accident prevention regulations of the professional association
instructions and safety instructions of this manual
CAUTION
Personal injury and damage to property!
The HeatBloC must only be used in heating circuits filled with heating water
according to VDI 2035 / Ö-Norm H 5195-1.
The HeatBloC must not be used in drinking water applications.
NOTICE
Material damage due to mineral oils!
Mineral oil products cause lasting damage to seals made of EPDM, whereby the sealant
properties get lost. We do not assume liability nor provide warranty for damage to property
resulting from sealants damaged in this way.
It is imperative to avoid that EPDM gets in contact with substances containing
mineral oils.
Use a lubricant based on silicone or polyalkylene and free from mineral oils, such as
Unisilikon L250L and Syntheso Glep 1 of the Klüber company or a silicone spray.

3Product description
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3Product description
The HeatBloC K35 is a preassembled group of fittings for heating circuits. The HeatBloC is
mounted directly onto a mounting plate or onto a distribution manifold. The distance between
the pipe axis of the HeatBloC and the wall must be at least 10 cm, as the connection C-3 is
on the back side of the mixing valve.
Attention: To use the PAW piping sets (item no. 36092KS2 / KS3 / KS4), the centre distance,
that is the distance to the wall, must be at least 150 mm!
3.1 Equipment
Rear view of mixing valve with flow on the right
A-1
Flow to the consumer circuit
A-2
Full metal thermometer with
immersion sleeve, integrated
in the ball valve (flow)
B
Heating pump
C
3-temperature mixing valve
C-1
High-temperature flow
from the buffer tank
C-2
Return to the buffer tank
C-3
Additional connection for the supply
of the low-temperature flow on
the back side of the mixing valve
C-4
Non-return valve, can be opened
D-1
Check valve, can be opened
D
Return pipe
E
Design insulation
with optimised function
F-2
Full metal thermometer with
immersion sleeve, integrated
in the ball valve (return)
F-1
Return from the consumer circuit

3Product description
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3.2 Function
Connection variant with two heating circuits
K35 - 3-temperature mixing valve with additional
connection for a second flow temperature
The 3-temperature mixing valve is used in
combination with a buffer tank which can be
heated either by a solar installation, a solid
fuel boiler or a conventional boiler.
If the consumer only needs a low temperature
level, such as for radiant panel heating systems,
the 3-temperature mixing valve first takes the
flow water from the intermediate part of the
storage tank. Only when the temperature in
this part is no longer sufficient, the hot water
from the upper part of the tank is used.
By using two parts of the storage tank for two
different flow temperatures, the energy from
the buffer tank can be used more efficiently.
The return temperatures are low and the
stratification in the buffer tank is maintained.
Application range:
Heating systems with buffer tank
and solar heating support
Control of radiant floor heating
and panel heating systems

3Product description
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3.2.1 3-temperature mixing valve [specialist]
The 3-temperature mixing valve, driven by an electric actuator, adjusts the flow temperature
of the consumer circuit to the required value by means of the flow sensor and the controller.
The 3-temperature mixing valve is equipped with a second flow connection (C-3) on the back
side. This connection allows to withdraw water with a lower flow temperature from the
intermediate part of the tank, f. ex. of a buffer tank. A check valve is integrated in this second
flow connection to avoid unwanted circulation in the mixing valve. This check valve is designed
for heating pumps with a maximum head of 7 m. If you want to use a more powerful pump, an
additional check valve may be necessary in the feed line.
Rear view of mixing valve with flow on the right
Front view of mixing valve with flow on the right
Position 0-5:
The flow temperature is
reached by mixing return
water and water from the
intermediate part of the tank.
Position 5:
100% supply from the
intermediate part of the tank
Position 5-10:
The flow temperature is
reached by mixing water
from the intermediate part
and the upper part of the
tank.

3Product description
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3.2.2 Change of the flow line [specialist]
Dismounting the mixing valve
1. Take off the thermometer handles (A-2, F-2) and remove the insulating front shell.
2. Take the group of fittings out of the insulating back shell.
3. Dismount the mixing valve (C).
Conversion of the mixing valve
1. Loosen the screw (1).
2. Take off the rotary knob (2) from the cock rod.
3. Loosen the screws (3).
4. Remove the cover plate (4).
5. Loosen the two screws (5).
6. Remove the front plate (6).
7. Extract the sealing bush (7) and the valve cock (8) from the mixing valve housing.
8. Loosen the screws (10) on the back side of the mixing valve and take off the cover (9).
9. Pull the sealing plug (11) to the front by using pliers. Remove the flow-reducing plate
(12) by pushing from front to back.

3Product description
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16. Turn the cover plate (4) such that the marking PAW is at the bottom and
that the scale is positioned as shown on the figure above.
17. Fix the cover plate (4) by using the screws (3).
18. Put the rotary knob (2) onto the cock rod.
19. Fix the rotary knob (2) on the cock (8) by using the screw (1).
Assembly position
for mixing valve with flow on the left
Assembly position
for mixing valve with flow on the right
10. Turn the housing of the mixing valve by 180°.
11. Mount the flow-reducing plate (12) on the back
side and the sealing plug (11) on the front side.
12. Mount the cover (9) on the back side of the
mixing valve. The letters on the cover indicate
the correct assembly position:
flow on the left: L points upwards
flow on the right: R points upwards
13. Fix the cover (9) by using the screws (10).
14. Insert the sealing bush (7) and the valve
cock (8) into the channel of the mixing valve.
15. Fix the front cover (6) by using the screws (5).
Mixing valve with flow on the right
Mixing valve with flow on the left
Flow
Flow

3Product description
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Retrofitting and commissioning of the heating circuit
1. Interchange the return pipe (D) and the flow pipe with the pump (B).
Consider the flow direction of the pump!
Turn the pump head such that the terminal box is directed to the top or to the centre
of the group of fittings.
2. Dismount and interchange the ball valves.
3. Mount the HeatBloC and connect it to the installation.
4. Check all union nuts before commissioning and firmly tighten them if necessary.
5. Mount the insulation only after having carried out a pressure test.
Mount the thermometer handles (A-2, F-2) in a final step.