PAW HeatBloC K33MAX 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
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Installation and Operation Instructions
HeatBloC K33MAX - DN 25

1 General 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-way mixing valve with bypass [specialist] ........................................................... 7
3.2.2 Check valve ........................................................................................................12
4Assembly and installation [specialist]..............................................................................13
4.1 Installation and commissioning of the HeatBloC......................................................... 13
4.2 Accessories: Cutting-ring compression fitting (not included in the scope of delivery).. 16
5Scope of delivery [specialist] ..........................................................................................16
6Technical data...............................................................................................................18
6.1 Pressure drop and pump characteristic curves........................................................... 19
Item no. 99360453x-mub-en – Version V04 – Issued 2017/11
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

1 General Information
2017/11 99360453x-mub-en – V04 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 mixed HeatBloC K33MAX DN 25.
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.

2 Safety 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.
NOTICE
Damage to property!
It is mandatory to mount the contact thermostat at the flow.
Only in this way, it prevents the heating circuit from overheating.

3 Product description
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3Product description
The HeatBloC K33MAX is a preassembled group of fittings for heating circuits.
The PAW HeatBloC is designed such that it can be directly mounted onto a PAW distribution
manifold or a mounting plate. With transition connections, the HeatBloCs can also be mounted
on modular distribution manifolds of other dimensions.
3.1 Equipment
A-1 Flow to the consumer circuit
A-2 Full metal thermometer with
immersion sleeve, integrated
in the ball valve (flow)
A-3 Contact thermostat, adjustable
B Heating pump
C Constant-value mixing valve
with thermal control valve and
adjustable bypass 0-50%
C-1 Flow from the heat generator
C-2 Return to the heat generator
C-3 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

3 Product description
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3.2 Function
K33MAX - constant value control circuit
with 3-way mixing valve and bypass 0-50%
The flow temperature of the heating circuit
is controlled by the integrated mixing valve.
Hot water from the boiler and cold return water
are mixed to obtain the desired constant flow
temperature of the heating circuit.
The thermal control valve is integrated in the
mixing valve and prevents the flow temperature
from rising above the maximum temperature set.
At the rotary knob of the mixing valve, the
maximum temperature can be set between
35 °C and 55 °C depending on the installation.
Application example: Radiant panel heating
systems operate on low temperature levels with
small temperature differences and high flow
rates. It is therefore sufficient to "inject" a small
amount of hot water into the "warm" return water.
Application range:
•Consumer circuits with a considerably
lower flow temperature than the boiler
flow temperature
•Small heating circuits with low output
and low control requirements
•Can be used instead of the K32 if the
existing controller cannot actuate an
additional mixing valve.

3 Product description
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3.2.1 3-way mixing valve with bypass [specialist]
The 3-way mixing valve is a constant-value mixing valve for radiant panel heating systems
(radiant floor heating, wall heating etc.) which are operated with a constant flow temperature
and thus guarantee a basic heat supply. The desired flow temperature can be set at the rotary
knob.
The mixing valve is equipped with a bypass which must be operated separately. Via this
bypass, cold return water is added to the flow of the HeatBloC. This can result in an increase
of the flow rate of the HeatBloC and in a decrease of the flow temperature.
Note
When the heating circuit is delivered, the bypass is closed.

3 Product description
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Adjustable bypass
1. During commissioning, determine the optimum bypass position for the operation of the
installation through a trial-and-error process.
If the slot of the bypass screw is
in a vertical position, the bypass
is closed (normal operation).
If the slot of the bypass screw is in
a horizontal position, the bypass is
completely open. A maximum flow
rate from the return to the flow line
is thus enabled. This adjustment
may be necessary for radiant floor
heating systems which require a
very high water flow volume.
Because of the bypass, the flow
temperature decreases and the
control may be affected in a
negative manner.
2. Check the position of the bypass during operation. Make sure that the flow rate is
sufficient and that the desired temperature is reached.

3 Product description
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Thermal control valve
Tflow < Tfix
The thermal control valve keeps the flow line
of the mixing valve completely open as
long as the water from the flow line to the
consumer is colder than the flow temperature
set of the thermal control valve.
Tflow ≈ Tfix
As soon as the water in the flow line has
reached the temperature set (+/- 5 K) of the
thermal control valve, the valve starts closing
the flow line of the storage tank / modular
distribution manifold and opens the return
line to the same extent (coming from the
consumers). The cold water from the return
line is mixed in the control valve with the hot
water from the flow line. Depending on the
temperature, the thermal control valve opens
or closes the flow line of the storage tank /
modular distribution manifold.
Tflow > Tfix
With rising temperature in the flow line or
rising temperature from the consumer return
line, the thermal control valve shuts off the
inlet of even hotter water. The temperature
of the flow to the HeatBloC / consumer
remains approximately constant during
operation.

3 Product description
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Change of the flow line
The HeatBloC is available in two versions: with "flow on the right" and "flow on the left".
Mixing valve with flow on the right
Mixing valve with flow on the left
NOTICE
Damage to property!
To change the flow line, a conversion kit for the mixing valve is mandatory!
A conversion without conversion kit leads to a malfunction of the mixing valve.
Please specify the following information when ordering the conversion kit:
- Nominal diameter of the group of fittings (see designation of the pump)
- PAW item number or PAW designation
- Change from/to: "change from flow on the right to flow on the left" or
"change from flow on the left to flow on the right"
Flow
Flow