PAW HeatBloC K34 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
2015/07 9939062x-mub-en – V10 1
Installation and Operation Instructions
K34 HeatBloC - DN 32

1 General information
2 9939062x-mub-en – V10 2015/07
Item no. 9939062x-mub-en - Version V10 – Issued 2015/07
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
Böcklerstr. 11
31789 Hameln, Germany

1 General information
2015/07 9939062x-mub-en – V10 3
Contents
1General information ............................................................................................................. 4
1.1Scope of these instructions ............................................................................................ 4
1.2Designated use .............................................................................................................. 4
2Safety instructions ............................................................................................................... 5
3Product description.............................................................................................................. 6
3.1Equipment ...................................................................................................................... 6
3.2Function ......................................................................................................................... 7
3.2.1Check valve and non return valve .......................................................................... 8
3.2.2Pump [specialist] ..................................................................................................... 9
3.2.33-way mixing valve [specialist] ................................................................................ 9
3.2.4Accessories: actuator (not included in delivery) ................................................... 13
4Assembly and installation [specialist] ................................................................................ 14
4.1Installation of the modular distribution manifold / wall bracket with mounting plate ..... 14
4.2Installation of the HeatBloC and commissioning .......................................................... 15
5Scope of delivery [specialist] ............................................................................................. 17
6Technical data ................................................................................................................... 18
6.1Pump and pressure drop characteristics ..................................................................... 19

1 General information
4 9939062x-mub-en – V10 2015/07
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
K34mixed HeatBloC. For other components of the installation, such as pumps, controllers or the
distribution manifold, see the manufacturers' instructions. The chapters called [specialist] are
intended for specialists only.
1.2 Designated use
The HeatBloC may only be used in hydronic heating closed-loop systems taking into
consideration the technical limit values indicated in these instructions. The HeatBloC must not
be used in domestic 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.

2 Safety instructions
2015/07 9939062x-mub-en – V10 5
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 hydronic heating closed-loop systems filled
with heating water according to VDI 2035 / Ö-Norm H 5195-1.
The HeatBloC must not be used in domestic water applications.
NOTICE
Material damage due to mineral oils!
Mineral oil products cause lasting damage to seals made of EPDM, whereby the sealant
properties are 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.

3 Product description
6 9939062x-mub-en – V10 2015/07
3Product description
The K34 HeatBloC is a preassembled fitting group for hydronic heating closed-loop systems.
The pump can be isolated by means of the ball valves and the mixing valve. Thus, you can
maintain the pump without draining the heating circuit.
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, the HeatBloCs
can also be installed on 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)
B Heating pump
C 3-way mixing valve
with adjustable bypass 0-50 %
C-1 Flow (boiler)
C-2 Return (boiler)
C-3 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 (consumer circuit)

3 Product description
2015/07 9939062x-mub-en – V10 7
3.2 Function
K34 3-way mixing valve with 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 mixing valve is
adjusted via an external controller and an electric
actuator.
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%),
although only a small amount of water from the boiler
is necessary.
Example: Radiant floor or wall heating is 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.
The K34 has a lower pressure loss than the K33.
Applications:
Consumer circuits with considerably lower
flow temperatures than the boiler flow
temperature
Control of radiant floor or wall heating

3 Product description
8 9939062x-mub-en – V10 2015/07
3.2.1 Check valve and non return valve
The HeatBloC is equipped with a check valve (D-1, opening pressure 200 mm wc) in the return
pipe and a non return valve (C-3, opening pressure 50 mm wc) in the mixing valve return.
They can be opened manually.
Operation
During operation, both marks must point to "Z" (closed).
 The check valve and the non return valve are 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 and the non return valve are open.
 Flow in both directions.

3 Product description
2015/07 9939062x-mub-en – V10 9
3.2.2 Pump [specialist]
The pump can be completely isolated. It can be replaced and maintained without draining of the
heating installation.
Isolation of the pump:
1. Disconnect the expansion tank from the installation.
2. Close the ball valves in the flow and the return (A-2, F-2).
3. Take off the actuator from the mixing valve.
4. Turn the bypass screw of the mixing valve so that the slot is in a vertical position.
5. Turn the nose of the valve cock so that the mixing valve is closed (for flow on the right:
nose points downwards, for flow on the left: nose points to the right).
The mixing valve is now closed.
3.2.3 3-way mixing valve [specialist]
The three-way mixing valve (C) driven by an electric motor adjusts the flow temperature of the
consumer circuit to the desired value in combination with a flow sensor and the controller.
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 HeatBloC.
Position 10: Passage,
no mixing, flow temperature
consumer = flow temperature
boiler
Position 0: 100% mixing
flow temperature consumer =
return temperature consumer
10
0

3 Product 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.