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

3 Product description
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Proceeding:
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)
and assemble it as described in the
instructions of the conversion kit.
4. Interchange the return pipe (D)
and 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.
5. Dismount and interchange the ball valves.
6. Mount the HeatBloC and connect it to the
installation.
7. Check all union nuts before
commissioning and firmly
tighten them if necessary.
8. Carry out a pressure test.
9. Mount the insulation and the
thermometer handles (A-2, F-2)

3 Product description
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3.2.2 Check valve
The heating circuit is equipped with a check valve (C-3, opening pressure 200 mm wc)
in the return line of the mixing valve. The check valve can be opened.
Operation
During operation, the marking must be directed to "Z".
The check valve is closed.
Flow only in the direction of the arrow.
Filling, draining, venting
For filling, draining and venting the installation,
the marking must be directed to "A".
The check valve is open.
Flow in both directions.

4 Assembly and installation [specialist]
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4Assembly and installation [specialist]
The HeatBloC K33MAX can be mounted on a PAW modular distribution manifold or on a wall
bracket. The modular distribution manifold and the wall bracket are optional accessories and
are thus not included in the scope of delivery.
NOTICE
Damage to property!
The location of installation must be dry, load-carrying, frost-proof and protected against
ultraviolet radiation in order to prevent material damage of the installation.
4.1 Installation and commissioning of the HeatBloC
The HeatBloC can be installed
•
Option 1:
on a PAW modular distribution manifold.
Flow
Heat generator
Return
Consumer circuit
Flow Return

4 Assembly and installation [specialist]
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•
Option 2:
on a mounting plate
•
Option 3:
directly on a wall bracket
Please observe the separate and respectively corresponding instructions regarding the
installation of the distribution manifold, of the mounting plate and of the wall bracket.
Flow
Flow
Return
Return
Heat generator
Consumer circuit
Return
Return
Flow
Flow

4 Assembly and installation [specialist]
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1. Take off the thermometer handles
(A-2, F-2) and remove the insulating
front shell of the HeatBloC.
2. Unscrew the nuts on the lower
connections of the HeatBloC
and take out the sealing rings.
If PAW modular distribution manifold
or transition connection is used:
3. Put the two nuts over the flanges.
4. Insert the sealing rings into the nuts.
5. Put the HeatBloC onto the two nuts.
6. Tighten the nuts. Make sure that the
nuts do not get jammed and that
the sealing rings do not slip.
7. Connect the HeatBloC to the
installation by using the pipes.
The installation to the piping must
be carried out without any tension.
8. Connect the pump.
9. Mount the pipe contact thermostat
(A-3) at the flow pipe.
10. Carry out a pressure test and
check all thread connections.
11. Mount the insulating front shell and
the thermometer handles (A-2, F-2).
Flange
(top view)
Nut
1
2
3
Flange
(side view)
Sealing ring

5 Scope of delivery [specialist]
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4.2 Accessories: Cutting-ring compression fitting (not included in the scope of delivery)
The connection to the heating installation can be carried out fast, pressure-proof and
without soldering if you use the optionally available compression fittings.
Not included in
the scope of delivery!
1. Push the union nut ② and the cutting ring ③ onto the
copper pipe ①. The pipe must protrude at least 3 mm
from the cutting ring in order to ensure the force
transmission and the sealing.
2. Insert the support sleeve ④ into the copper pipe.
3. Insert the copper pipe with the plugged-on individual
parts (②, ③ and ④) as far as possible into the
housing of the compression fitting ⑤.
4. First, screw the union nut ② manually.
5. Tighten the union nut ② by rotating one full turn.
Secure the housing of the compression fitting ⑤
against distort, in order to avoid damaging the
sealing ring.
5Scope of delivery [specialist]
NOTICE
Complaints and requests/orders of spare parts will only be processed with information on
the serial number! The serial number is placed on the return pipe of the heating circuit.

5 Scope of delivery [specialist]
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Item no. heating circuit
Pump
Item no.
EEI
360453WY6 Wilo-Yonos PARA RS 25/6-RKA E1236046 < 0.20
360453WY8 Wilo-Yonos PARA RS 25/7.5-RKA E1236048 < 0.21
360453WH6 Wilo-Stratos PICO 25/1-6 E1239625 < 0.20
360453GL9 Grundfos UPML 25-95 Auto E121394 < 0.23
360453GM6 Grundfos UPM3 Auto L 25-70 PP3 E1212460 < 0.20
360453GH6 Grundfos Alpha2.1 25-60 E121391 < 0.17
Accessories
Item number
Conversion kit for 3-way mixing valve "from flow on the left to flow on the right" 34044R
Conversion kit for 3-way mixing valve "from flow on the right to flow on the left" 34044L
Working element for thermal control valve, 45 °C G3807
Sealing set for mixing valve 37013

6 Technical data
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6Technical data
K33MAX
DN 25 (1")
Dimensions
Centre distance (1) 125 mm
Width insulation (2) 250 mm
Height insulation (3) 383 mm
Installation length (4) 340 mm
Connections
Outlet (A-1, F-1) 1" internal thread
Inlet (C-1, C-2) 1½" external thread, flat sealing
Technical data
Opening pressure check valve (C-3) 200 mm wc, can be opened
Materials
Valves and fittings Brass
Gaskets EPDM
Insulation EPP

6 Technical data
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K33MAX
DN 25 (1")
Hydraulics
Maximum pressure 6 bars
Maximum temperature 110 °C
KVS value [m3/h] 4.1
6.1 Pressure drop and pump characteristic curves
Pressure [m wc]
Pressure [kPa]
Flow rate [l/h]

99360453x-mub-en – V04 2017/11
PAW GmbH & Co. KG
Böcklerstraße 11
D-31789 Hameln, Germany
www.paw.eu
Phone: [phone] - 0
Fax: [phone] - 98