PAW GmbH & Co.KG
Installation and Operation Instructions
HeatBloC K36E - DN 25
Boiler charging set
Böcklerstr. 11, D-31789 Hameln, Germany
Phone: +49-5151-9856-0, Fax: +49-5151-9856-98
E-mail: info@paw.eu, Web: www.paw.eu
2016/01 993603x2x-mub-en – V09 1
1 General Information
Item no. 993603x2x-mub-en – Version V09 – Issued 2016/01
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
D-31789 Hameln, Germany
2 993603x2x-mub-en – V09 2016/01
1 General Information
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
3.3 Thermo controller ................................................................................................................ 9
3.4 Check valve ....................................................................................................................... 12
4 Assembly and installation [specialist] ....................................................................................... 13
4.1 Assembly of the HeatBloC and commissioning ................................................................. 14
4.2 Accessories: compression fitting (not included in delivery) ............................................... 16
5 Scope of delivery [specialist] .................................................................................................... 17
6 Technical data ......................................................................................................................... 18
6.1 Pressure drop and pump characteristics ........................................................................... 19
2016/01 993603x2x-mub-en – V09 3
1 General Information
Carefully read these instructions before installation and commissioning.
Save these instructions in the vicinity of the installation for future reference.
1 General Information
1.1 Scope of these instructions
These instructions describe the installation, commissioning and operation of the HeatBloC K36E.
For other components of the heating system such as pumps, controllers or distribution manifolds,
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 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.
4 993603x2x-mub-en – V09 2016/01
2 Safety instructions
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 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.
2 Safety 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
2016/01 993603x2x-mub-en – V09 5
3 Product description
A-1
Return (consumer circuit)
A-2
Thermo controller
B
Heating pump
C-2
Full metal thermometer integrated in
the ball valve (return, blue)
C-1
Return (boiler)
D-1
Flow (boiler)
D-2
Full metal thermometer integrated in
the ball valve (flow, red)
E
Flow tube
F
Design insulation with
optimised function
G-2
Check valve, can be opened
G-3
Coupling piece for
overhead installation
G-1
Flow (consumer circuit)
3 Product description
The HeatBloC K36E is a preassembled fitting group for hydronic heating closed-loop systems.
The pump can be isolated by means of the ball valves and can thus be maintained without draining
of the system.
You can mount the PAW HeatBloC directly onto a wall bracket or under/on a PAW modular
distribution manifold. With adaptor connections, PAW HeatBloCs can also be installed on
PAW distribution manifolds with other dimensions.
3.1 Equipment
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3 Product description
K36E boiler charging set for return flow temperature maintenance
of solid fuel boilers, wood firing and stove heating systems
The boiler charging set prevents the temperature in the boiler
from falling under the dew point, thus reducing the contamination
of the boiler.
Applications:
The boiler charging set can be mounted to a buffer tank or
a hydraulic separator. When the opening temperature of
50 °C, 55 °C or 60 °C is reached in the boiler circuit, the
pump can charge a tank or serves to separate the
pressures in the hydraulic separator.
The following figure shows the adjustments necessary for
this system.
Buffer
tank
Solid
fuel boiler
Overflow valve closed
(adjustment knob screwed in)
Pump:
Operation mode: ∆p-c
Performance: maximum
3.2 Function
2016/01 993603x2x-mub-en – V09 7
3 Product description
The boiler charging set can be mounted under/on a
distribution manifold. In this system the pump exerts a
pressure on the entire installation. When the overflow valve
in the thermo controller is open, the pressure can be
reduced via the valve. Undesired circulation, which could
lead to overcharging of the domestic water tank, can thus
be prevented.
The following figure shows the adjustments necessary for
this system.
Domestic water
tank
Overflow valve open
(adjustment knob screwed out)
Solid
fuel boiler
Pump:
Operation mode: ∆p-c
Performance: ²⁄₃ max.
or speed level II
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3 Product description
Overflow valve open
close
Overflow valve closed
open
3.3 Thermo controller
The thermo controller is equipped with an overflow valve and a thermal control valve.
Overflow valve
In systems with a distribution manifold the pump of the boiler charging set exerts a pressure on the
entire installation. When the overflow valve in the thermo controller is open, the pressure can be
reduced via the valve. Undesired circulation, which could lead to overcharging of the domestic
water tank, can thus be prevented.
2016/01 993603x2x-mub-en – V09 9
3 Product description
1. When the temperature of the water in the boiler circuit is
lower than the opening pressure of the thermal control
valve, the valve is closed and thus the line to the
consumers. The water is circulated in the boiler circuit
through the completely opened bypass.
2. When the water in the boiler circuit has obtained the
opening temperature (+/- 3 K), the thermal control valve
opens the line from/to the consumers. The circulation in
the consumer circuit is thus guaranteed. The cold water
from the consumer return line is mixed in the control
valve with the hot water from the bypass. Depending on
the temperature and the flow rate of the water from the
return line, the thermal control valve shuts off or opens
the line to the consumers. Thus the return line which
leads to the boiler always remains at a certain
temperature level.
3. With rising temperature from the return line of the
consumers the thermal control valve opens the line to
the consumers completely. The temperature of the boiler
return remains nearly constant (+/- -3 K) until the buffer
tank is completely charged.
Thermal control valve
The thermal control valve serves as a bypass in the startup phase.
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3 Product description
Change of the flow line [specialist]
1. Take off the thermometer handles (C-2, D-2)
and remove the insulating front shells.
2. Take the heating circuit out of the insulating
back shell.
3. Take off the union nuts at the thermo
controller (A-2).
4. Dismount the thermo controller and turn it
by 180°.
Modification and commissioning of the heating circuit
1. Interchange the flow line with the return line
and the pump (B).
2. Mount the thermo controller and tighten the
union nuts.
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 heating
circuit.
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 after the pressure test.
Mount the thermometer handles (C-2, D-2).
2016/01 993603x2x-mub-en – V09 11
3 Product description
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.
3.4 Check valve
The HeatBloC is equipped with a check valve (G-2) in the thermo controller (A-2). It can be opened
manually.
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4 Assembly and installation [specialist]
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 Assembly and installation [specialist]
The HeatBloC K36E must be either installed with a wall bracket or under/on a PAW modular
distribution manifold. The K36E is prepared for assembly under a distribution manifold DN 25 when
it is delivered. If you want to mount the K36E on a distribution manifold, remove the coupling piece
for overhead installation (G-3).
The wall bracket and the distribution manifold are not included in delivery.
2016/01 993603x2x-mub-en – V09 13
4 Assembly and installation [specialist]
The HeatBloC can be installed
Option 1:
directly to the wall with a wall bracket
(item no. 3422)
Option 2:
under a PAW modular distribution
manifold.
Consumer circuit
Consumer circuit
Flow
Return
Return
Flow
Flow
Return
Flow
Return
Boiler circuit
Boiler circuit
4.1 Assembly of the HeatBloC and commissioning
14 993603x2x-mub-en – V09 2016/01
4 Assembly and installation [specialist]
Assembly
1. Fix the wall brackets to the wall with the
enclosed screws and washers.
2. Screw the HeatBloC with the coupling
piece for overhead installation (G-3)
to the wall bracket.
only for assembly under a modular
distribution manifold
3. Mount the distribution manifold on the
PAW wall bracket. You can mount the
heating circuit K36E directly on the
connections of the manifold.
Remove the plugs in the connections of
the distribution manifold if necessary.
Piping
1. Connect the HeatBloC to the installation.
The hydraulic schemes for the two
assembly versions can be found on
pages 7 and 8. The connections to the
installation must be stress-free.
2. Connect the pump.
3. Carry out the pressure test and check
all thread connections.
2016/01 993603x2x-mub-en – V09 15
4 Assembly and installation [specialist]
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) all the way 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.
4.2 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.
16 993603x2x-mub-en – V09 2016/01
5 Scope of delivery [specialist]
NOTICE
Complaints and requests/orders of spare parts will only be processed with information on the
serial number!
The serial number can be found on the return pipe of the heating circuit.
Accessories
Item number
Cartridge for thermal control valve 50 °C
G3811
Cartridge for thermal control valve 55 °C
G3809
Cartridge for thermal control valve 60 °C
G3808
Pump
Item number
Wilo-Yonos PARA RS 25/6-RKA
E1236046
Wilo-Stratos PICO 25/1-6
E1239625
Grundfos UPM3 Auto L 25-70 PP3
E1212460
Grundfos Alpha2.1 25-60
E121391
5 Scope of delivery [specialist]
2016/01 993603x2x-mub-en – V09 17
6 Technical data
K36E
DN 25 (1")
Dimensions
Centre distance (1)
125 mm
Width insulation (2)
250 mm
Height insulation (3)
396 mm
Installation length (4)
405 mm
Connections
Outlet (A-1, G-1)
1½" internal thread (union nut)
Inlet (C-1, D-1)
1" internal thread
Technical data
Opening pressure check valve (G-2)
200 mm wc, can be opened
Opening temperature thermovalve
50 °C / 55 °C / 60 °C
Materials
Valves and fittings
Brass
Gaskets
EPDM / NBR
insulation
EPP
6 Technical data
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6 Technical data
K36E
DN 25 (1")
Hydraulics
Maximum pressure
6 bars
Maximum temperature
110 °C
KVS value [m3/h]
5.5
Pressure [m wc]
Pressure [kPa]
Flow rate [l/h]
6.1 Pressure drop and pump characteristics
2016/01 993603x2x-mub-en – V09 19
PAW GmbH & Co.KG
Böcklerstraße 11
D-31789 Hameln, Germany
www.paw.eu
Phone: +49 (0) 5151 9856 - 0
Fax: +49 (0) 5151 9856 - 98
993603x2x-mub-en – V09 2016/01
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