PAW HeatBloC K33 - DN 20 Owner's manual

PAW GmbH & Co. KG
Böcklerstr. 11, 31789 Hameln, Germany
Phone: [phone], Fax: [phone]
E-mail: [e-mail], Web: www.paw.eu
2020/04 9932073x-mub-en – V14 1
Installation and Operation Instructions
HeatBloC®K33 - DN 20

1General information
2 9932073x-mub-en – V14 2020/04
Item no. 9932073x-mub-en – Version V14 – Issued 2020/04
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
31789 Hameln - Germany

1General information
2020/04 9932073x-mub-en – V14 3
Contents
1General information .....................................................................................................4
1.1 Scope of these instructions ..........................................................................................4
1.2Designated use ............................................................................................................4
2Safety instructions .......................................................................................................5
3Product description......................................................................................................6
3.1 Equipment....................................................................................................................6
3.2 Function .......................................................................................................................7
3.2.1 3-way mixing valve with bypass [specialist]........................................................... 8
3.2.2 Check valve ........................................................................................................12
4Assembly and installation [specialist]........................................................................... 13
4.1 Installation of the modular distribution manifold / wall bracket with mounting plate ..... 13
4.2 Installation of the HeatBloC®and commissioning .......................................................14
4.3 Accessories: compression fitting (not included in delivery) .........................................16
5Scope of delivery [specialist]....................................................................................... 17
6Technical data........................................................................................................... 19
6.1 Pressure drop and pump characteristic curves........................................................... 20
7Disposal ................................................................................................................... 21

1General information
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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 function, installation, commissioning and operation of the
mixed HeatBloC®K33. For other components of the installation, such as the pumps, controllers
or the distribution manifold, see 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 excludes any liability claims.
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 mentioned in 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 of mineral oils, such as
Unisilikon L250L and Syntheso Glep 1 of the Klüber company or a silicone spray.
NOTICE
Damage to property!
Mount the pipe contact thermostat at the flow pipe. It prevents the heating circuit
from overheating.

3Product description
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3Product description
The HeatBloC®K33 is a preassembled group of fittings for heating circuits. The integrated pump
can be isolated by means of the ball valves and the mixing valve and can thus be maintained
without draining of the system.
The PAW HeatBloC®is designed such that it can be directly mounted onto a PAW distribution
manifold or a mounting plate with thread connections. With adaptor connections, PAW
HeatBloC®s can also be installed on PAW distribution manifolds with other dimensions.
3.1 Equipment
A-1 Flow (consumer circuit)
A-2 Full metal thermometer
with immersion sleeve
integrated in the ball valve (flow)
A-3 Pipe contact thermostat with sensor,
adjustable
B Heating pump
C 3-way mixing valve
with adjustable bypass 0-50 %
C-1 Flow (boiler)
C-2 Return (boiler)
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 (consumer circuit)

3Product description
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3.2 Function
K33 - controlled circuit with constant value 20-50 °C
with 3-way mixing valve and bypass 0-50%
The flow temperature of the HeatBloC®is controlled
by the integrated mixing valve. Hot water from the
boiler and cold return water are mixed to obtain the
desired flow temperature. The HeatBloC®flow
temperature is adjusted with a mixing head and a flow
sensor.
The rate of premixing is adjusted at the mixing valve
bypass and a certain amount of cold return water is
mixed to the flow water. The three-way actuator can
work over the whole adjustment range (0-100%).
Example: Radiant floors or walls are operated
with a low temperature level and low temperature
differences, but high flow rates. It is therefore
sufficient to "inject" a small amount of hot water
into the warm return water.
Application ranges:
•Consumer circuits with considerably lower flow
temperatures than the boiler flow temperature
•Small heating circuits with low power output
and low requirements regarding the control
•Can be used instead of the K34 if the
controller cannot operate another mixing
valve.

3Product 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 floors or walls which
are operated with a constant flow temperature and thus guarantee the basic heat supply.
The desired flow temperature can be adjusted at the thermostatic head. The mixing valve is
equipped with a bypass which can be adjusted separately. Cold return water flows through
the bypass into the flow, thus increasing the flow rate in the heating circuit.
Note
When the HeatBloC®is delivered, the bypass is closed.

3Product description
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1. Determine the optimum bypass position during commissioning in a trial-and-error
process.
When the slot of the bypass screw
is in a vertical position, the bypass
is closed (normal operation).
When the slot of the bypass screw
is in a horizontal position, the
bypass is completely open.
This allows the highest possible flow
rate from the return to the flow line.
This adjustment may be necessary
for radiant floors requiring a very
high flow rate. The flow temperature
is low and the control may be
negatively affected.
2. Check the bypass position during operation. Make sure that the flow rate is sufficient
and that the desired temperature is reached.

3Product description
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Change of the flow line
The HeatBloC®is available in two versions with flow on the right or on the left.
Mixing valve with flow on the right Mixing valve with flow on the left
NOTICE
Malfunction!
A conversion kit is mandatory for the change of the flow line! When you change
the flow line without using a conversion kit, the mixing valve will not work properly.
Please specify the following information when ordering the conversion kit:
- Nominal diameter of the HeatBloC®(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

3Product description
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Proceeding:
•Take off the thermometer handles (A-2, F-2) and remove the insulating front shell.
•Take the HeatBloC®out of the insulating back shell.
•Dismount the mixing valve (C) and assemble it as described in the instructions
of the conversion kit.
•Interchange the return pipe (D) and the flow pipe and the pump (B).
Consider the flow direction of the pump!
Turn the pump head such that the terminal head is directed to the top or to the
centre of the HeatBloC®.
•Dismount and interchange the ball valves.
•Mount the HeatBloC®and connect it to the installation.
•Check all union nuts before commissioning and firmly tighten them if necessary.
•Mount the insulation after the pressure test. Mount the thermometer handles (A-2, F-2).

3Product description
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3.2.2 Check valve
The HeatBloC®is equipped with a check valve (D-1, opening pressure 200 mm wc) in the
return pipe. It can be opened manually.
Operation
During operation, the mark must be directed to "Z".
The check valve is closed.
Flow only in the direction of the arrow.
Filling, emptying, bleeding
For filling, emptying and bleeding the mark must be
directed to "A".
The check valve is open.
Flow in both directions.

4Assembly and installation [specialist]
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4Assembly and installation [specialist]
The K33 HeatBloC®must be either installed on a PAW modular distribution manifold or a set
of wall bracket and mounting plate. The modular distribution manifold, the wall bracket and
the mounting plate are not included in delivery.
NOTICE
Damage to property!
The location of installation must be dry, load-carrying, frost-proof and protected against
ultraviolet radiation to prevent material damage to the installation.
4.1 Installation of the modular distribution manifold / wall bracket with mounting plate
Mount the modular distribution manifold or the wall bracket with mounting plate as described
in the separate instructions.
If possible, choose the largest distance to
the wall. In this way it is easier to mount
the insulation.

4Assembly and installation [specialist]
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4.2 Installation of the HeatBloC®and commissioning
The HeatBloC®can be installed
•
Option 1:
on a PAW modular distribution manifold.
•
Option 2:
on a mounting plate
with thread connections.
Flow
Flow
Boiler circuit
Flow
Flow
Return
Return
Return
Return
Boiler circuit
Consumer circuit Consumer circuit

4Assembly 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.
3. Flip 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.
Take care that the nuts do not get
jammed and that the sealing rings
do not slip.
7. Connect the HeatBloC®to the
installation. The installation to the
piping must be carried out without
any tension.
8. Connect the pump.
9. Mount the pipe contact thermostat
and the sensor (A-3) at the flow pipe.
10. Carry out the 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

4Assembly and installation [specialist]
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4.3 Accessories: compression fitting (not included in delivery)
The connection to the heating installation can be carried out fast, pressure-proof and without
soldering when 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 the plugged-on
individual parts (②, ③ and ④) all the way into
the housing of the cutting-ring 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]
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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.

5Scope of delivery [specialist]
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Position
Spare part
Item number
1 Thermometer ball valve DN 20, F ½" x ¾" int. thread N00202
2 Thermometer handle for ball valve 1" N00248
3 Dial thermometer, red scale, d=50 mm, 0-120 °C N00242
4 Dial thermometer, blue scale, d=50 mm, 0-120 °C N00243
5 Union nut G 1" 2055
6 Gasket ½", for threaded connection 1" N00129
7 Pump see following table
8 Thermostatic head, 20-50 °C, with contact sensor N00042
9 Contact thermostat, 20-60 °C N00083
10 Brass pipe DN 20, 2x 1" ext. thread, 130 mm,
with check valve
N00141
Conversion kit for 3-way mixing valve "from flow on the left to
flow on the right" 31071
Conversion kit for 3-way mixing valve "from flow on the right to
flow on the left" 31072
Item number heating circuit*
Pump
Item no.
EEI
32073WP6 Wilo Para SC 15/6-43 N00258 < 0.20
32073WH6 Wilo-Stratos PICO 15/1-6 E1239615 < 0.20
32073GM6 Grundfos UPM3 Auto L 15-70 PP3 E1212360 < 0.20
32073GH6 Grundfos Alpha2.1 15-60 E121221 < 0.17

6Technical data
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6Technical data
K33
DN 20 (¾")
Dimensions
Centre distance (1) 90 mm
Width insulation (2) 180 mm
Height insulation (3) 385 mm
Installation length (4) 255 mm
Connections
Outlet (A-1, F-1) ¾" internal thread
Inlet (C-1, C-2) 1" external thread, flat sealing
Technical data
Opening pressure check valve (D-1) 200 mm wc, can be opened
Materials
Valves and fittings Brass
Gaskets EPDM/NBR
Insulation EPP

6Technical data
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K33
DN 20 (¾")
Hydraulics
Maximum pressure 6 bars
Maximum temperature 110 °C
KVS value [m3/h] 1.3
6.1 Pressure drop and pump characteristic curves
Pressure [m wc]
Pressure [kPa]
Flow rate [l/h]