PAW HeatBloC K32 Owner's manual

Installation and Operation Instructions
HeatBloC® K32
DN 25 / DN 32
DN 25 DN 32
PAW GmbH & Co. KG
Böcklerstraße 11, 31789 Hameln, Germany
Phone: [phone], Fax: [phone]
E-mail: [email protected], Web: www.paw.eu
06/2023 993x053x-mub-en - V07 1

Table of Contents
1 General Information...................................................................................................3
1.1 Scope of these instructions........................................................................................3
1.2 Designated use........................................................................................................... 3
2 Safety instructions......................................................................................................4
3 Product description.................................................................................................... 5
3.1 Equipment...................................................................................................................5
3.2 Function.......................................................................................................................6
3.2.1 3-way mixing valve [specialist]..................................................................................7
3.2.2 Pump [specialist].........................................................................................................10
3.2.3 Check valve................................................................................................................. 11
3.2.4 Accessories: Actuator (optional)............................................................................... 12
4 Mounting 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
5 Scope of delivery [specialist]..................................................................................... 17
5.1 Spare parts DN 25....................................................................................................... 17
5.2 Spare parts DN 32....................................................................................................... 19
6 Technical data............................................................................................................. 21
6.1 Pressure drop and pump characteristic curves DN 25.............................................23
6.2 Pressure drop and pump characteristic curves DN 32.............................................23
7 Disposal....................................................................................................................... 24
8 Notes............................................................................................................................25
Table of Contents
06/2023 993x053x-mub-en - V07 2

1 General 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, functioning and the operation of a mixed
HeatBloC®.
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 product may only be used in heating circuits taking into consideration the technical limit values
indicated in these instructions.
It must not be used in drinking water applications.
Improper usage 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 product.
1 General Information
06/2023 993x053x-mub-en - V07 3

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 these instructions
CAUTION
Personal injury and damage to property!
The product must only be used in heating circuits filled with heating water according
to VDI 2035 / Ö-Norm H 5195-1.
►The product 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
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 prevent the EPDM sealing elements from making contact with substances
containing mineral oils.
►Use a silicone- or polyalkylene-based lubricant free of mineral oil such as Unisilikon L250L
and Syntheso Glep 1 from Klüber or a silicone spray.
2 Safety instructions
4 993x053x-mub-en - V07 06/2023

3 Product description
The HeatBloC® is a preassembled group of fittings for heating circuits. The pump can be isolated by
means of the ball valves and the mixing valve. The pump can thus be maintained easily without
draining the heating circuit system.
The PAW HeatBloC® is designed such that it can be directly mounted onto a distribution manifold or a
mounting plate. With adaptor connections, PAW HeatBloC®s can also be installed on distribution
manifolds with other dimensions.
3.1 Equipment
A-1 Flow to the consumer circuit
A-2 All-metal thermometer with immersion sleeve,
integrated in the ball valve (flow)
B Heating pump
C 3-way mixing valve
C-1 Flow from the heat generator
C-2 Return to the heat generator
D Return pipe
D-1 Check valve, can be opened
E Design insulation with optimised function
F-1 Return from the consumer circuit
F-2 All-metal thermometer with immersion sleeve,
integrated in the ball valve (return)
3 Product description
06/2023 993x053x-mub-en - V07 5

3.2 Function
K32 - HeatBloC® with 3-way mixing valve
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 flow
temperature of the heating circuit. The mixing valve is
adjusted via an external controller in combination with an
electric actuator. The ball valves allow a maintenance of
the pump, of the boiler / heat generator circuit as well as of
the consumer circuit without putting the entire installation
out of operation. Two thermometers display the
temperatures of the flow and the return and allow thus a
function control. The integrated check valve can be
opened, it avoids an unwanted circulation and can be put
out of operation to flush and fill the installation. The
insulation avoids that heat energy gets lost.
Application range:
●Installations with several
HeatBloC®s and different flow
temperatures (radiators and
radiant floor heating)
●Installations with high
fluctuations of the flow
temperature due to the heat
generator (solid fuel boilers,
installations with power-heat
cogeneration)
3 Product description
6 993x053x-mub-en - V07 06/2023

3.2.1 3-way mixing valve [specialist]
The 3-way mixing valve (C), driven by an electric actuator, adjusts the flow temperature of the
consumer circuit to the required value by means of the flow sensor and the controller.
Position 10: passage, no mixing
flow temperature consumer = flow temperature heat generator
Position 0: 100 % mixing
flow temperature consumer = return temperature consumer
3 Product description
06/2023 993x053x-mub-en - V07 7

Change of the flow line [specialist]
Dismounting of the mixing valve
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).
Retrofitting of the mixing valve
1. Loosen the screw (1).
2. Take off the rotary knob (2) from the cock rod.
3. Loosen the screws (3).
4. Remove the cover plate (4).
5. Loosen the two screws (5).
6. Remove the front plate (6).
7. Extract the sealing bush (7) with the cock plug (8) from the housing of the mixing valve.
8. Loosen the screws on the rear side of the mixing valve (10).
9. Take off the cover (9) on the rear side of the mixing valve and fix it on the other side of the mixing
valve by using the screws (10).
10. Insert the sealing bush (7) with the cock plug (8) into the channel of the mixing valve.
3 Product description
8 993x053x-mub-en - V07 06/2023

11. Screw down the front plate (6) using the screws (5).
Mixing valve with flow on the right Mixing valve with flow on the left
12. Turn the cover plate (4) in such a way that the marking PAW is at the bottom and that the scale is
positioned as shown in the figure above.
13. Fix the cover plate (4) by using the screws (3).
14. Put the rotary knob (2) onto the cock rod.
15. Fix the rotary knob (2) on the cock plug (8) by using the screw (1).
Retrofitting and commissioning of the HeatBloC®
1. Interchange the return pipe (D) and the flow pipe with 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.
2. Dismount and interchange the ball valves.
3. Mount the heating circuit and connect it to the installation.
4. Check all union nuts before commissioning and firmly tighten them if necessary.
5. Mount the insulation only after having carried out a pressure test. Mount the thermometer
handles (A-2, F-2) in a final step.
3 Product description
06/2023 993x053x-mub-en - V07 9

3.2.2 Pump [specialist]
The pump can be completely isolated. It can be replaced and maintained without draining the heating
circuit system.
Isolation of the pump
1. Close the ball valves in the flow and the return (A-2, F-2).
2. Remove the actuator from the mixing valve.
3. Turn the rotary knob of the mixing valve such that the black nose is directed to "VL zu" (flow
closed).
4. Cut off the expansion tank to depressurise the installation. The mixing valve is now closed and
drop tight. The pump can be dismounted.
3 Product description
10 993x053x-mub-en - V07 06/2023

3.2.3 Check valve
The product is equipped with a check valve in the return pipe. 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.
3 Product description
06/2023 993x053x-mub-en - V07 11

3.2.4 Accessories: Actuator (optional)
The PAW actuator for weather-compensated control is available as an accessory.
For mixing valves with flow on the left, the scale must be turned by 180°.
for mixing valve with flow on the right for mixing valve with flow on the left
Assembly of the actuator - flow on the right:
If the PAW actuator has been purchased as an optional
accessory, the mixing valve contains a metal plate. To
mount the PAW actuator on the mixing valve, proceed as
follows:
1. Turn the rotary knob of the mixing valve into
position 0.
2. Set the actuator to manual mode by turning the
selector switch.
3. Turn the rotary knob of the actuator to the left to the
position shown on the adjacent figure.
4. Mount the rotation lock / the stop bolt in the left
opening of the metal plate. The actuator is fixed on a
stop bolt.
5. Put the PAW actuator on the rotary knob of the mixing
valve and mount the actuator on the stop bolts. The
PAW actuator must be mounted in a horizontal
position.
6. Set the actuator to automatic mode.
3 Product description
12 993x053x-mub-en - V07 06/2023

4 Mounting and installation [specialist]
The HeatBloC® can either be mounted on a distribution manifold or on a wall bracket. The distribution
manifold and the wall bracket are opt. accessories and are thus not included in the scope of delivery.
WARNING
Damage to property!
The installation site must be dry, stable, 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 mounted
Option 1:
on a PAW modular distribution manifold.
Option 2:
on a mounting plate with transition thread
connections.
consumer circuit
return flow
flow return
heat generator
consumer circuit
return flow
return flow
heat generator
4 Mounting and installation [specialist]
06/2023 993x053x-mub-en - V07 13

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.
4 Mounting and installation [specialist]
14 993x053x-mub-en - V07 06/2023

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 a 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. Carry out a pressure test and check all
thread connections.
10. Mount the insulating front shell and the
thermometer handles (A-2, F-2).
4 Mounting and installation [specialist]
06/2023 993x053x-mub-en - V07 15

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.
1. Push the union nut ②and 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 ④into the copper pipe.
3. Insert the copper pipe with the plugged-on
individual parts ②, ③and ④as far as possible
into the body of the compression fitting ⑤.
4. First, screw the union nut ②manually.
5. Tighten the union nut ②by rotating one full
turn. Secure the body of the compression fitting
⑤against distort in order to avoid damaging the
sealing ring.
Not included in the scope of delivery!
4 Mounting and installation [specialist]
16 993x053x-mub-en - V07 06/2023

5 Scope of delivery [specialist]
NOTICE
Serial number
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 product.
5.1 Spare parts DN 25
5 Scope of delivery [specialist]
06/2023 993x053x-mub-en - V07 17

Position Spare part Item number
1 Thermometer ball valve DN 25, flange 1" x 1" int. thread N00244
2 Thermometer handle for thermometer 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 1½" N00269
6 Gasket 1" for threaded connection 1½" N00131
7 Pump see following table
8 Insulation for HeatBloC® DN 25 N00016
9 Actuator 5 Nm, 230 V, 50 Hz 705001
10 Brass pipe DN 25, 2 x 1½" ext. thread, 180 mm, with check valve N00018
Item no. heating circuit* Pump Item no. pump EEI
36053(M)WP6 Wilo Para SC 25/6-43 N00259 < 0.20
36053(M)WP8 Wilo Para SC 25/8-60/O N00271 < 0.20
36053(M)WN06 Wilo Yonos PICO 25/1-6 N00214 < 0.20
36053(M)GL9 Grundfos UPML 25-95 Auto N00396 < 0.23
36053(M)GM6 Grundfos UPM3 Auto L 25-70 PP3 N00237 < 0.20
36053(M)GH6 Grundfos Alpha2.1 25-60 N00236 < 0.17
*Heating circuits with an actuator additionally contain a M in the item number, f. ex. 36053MWH6
(without actuator = 36053WH6)
5 Scope of delivery [specialist]
18 993x053x-mub-en - V07 06/2023

5.2 Spare parts DN 32
Position Spare part Item number
1 Thermometer ball valve DN 32, flange 1¼" x 1¼" int. thread N00245
2 Thermometer handle for thermometer 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 2" N00270
6 Gasket 1¼", for threaded connection 2" N00133
7 Pump see following table
8 Insulation for HeatBloC® DN 32 N00027
5 Scope of delivery [specialist]
06/2023 993x053x-mub-en - V07 19

Position Spare part Item number
9 Actuator 5 Nm, 230 V, 50 Hz 705001
10 Brass pipe DN 32, 2x 2" ext. thread, 180 mm, with check valve N00139
Item no. heating circuit* Pump Item no. pump EEI
39053(M)WP6 Wilo Para SC 30/6-43 N00261 < 0.20
39053(M)WN06 Wilo Yonos PICO 30/1-6 N00313 < 0.20
39053(M)WY10 Wilo Yonos MAXO plus 30/0.5-10 N00398 < 0.20
39053(M)GM6 Grundfos UPM3 Auto L 32-70 PP3 N00240 < 0.20
39053(M)GH6 Grundfos Alpha2.1 32-60 N00239 < 0.17
39053(M)GL9 Grundfos UPML 32-95 Auto N00344 < 0.23
*Heating circuits with an actuator additionally contain a M in the item number, f. ex. 39053MWH6
(without actuator = 39053WH6)
5 Scope of delivery [specialist]
20 993x053x-mub-en - V07 06/2023