PAW HeatBloC K33 Owner's manual

PAW GmbH & Co. KG
Böcklerstr. 11, 31789 Hameln - Germany
Phone: [phone], Fax: [phone]
E-mail: [email protected], Web: www.paw.eu
2020/03 9936073x-mub-en – V03 1
Installation and Operation Instructions
HeatBloC®K33 - DN 25

1General Information
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Contents
1General Information.........................................................................................................3
1.1 Scope of these instructions ..........................................................................................3
1.2 Designated use ............................................................................................................3
1.3 Disposal .......................................................................................................................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 and non-return valve .......................................................................11
4Assembly and installation [specialist]..............................................................................12
4.1 Installation and commissioning of the HeatBloC®.......................................................12
4.2 Accessories: Cutting-ring compression fitting (not included in the scope of delivery).. 15
5Scope of delivery [specialist] ..........................................................................................16
6Technical data...............................................................................................................18
6.1 Pressure drop and pump characteristic curves...........................................................19
Item no. 9936073x-mub-en – Version V03 – Issued 2020/03
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
2020/03 9936073x-mub-en – V03 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®K33 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.
1.3 Disposal
Possibilities to return waste electrical and electronic equipment
Waste electrical and electronic equipment deriving from private households
can be disposed at collection points of the public waste management
authorities or at disposal points set up by manufacturers or distributors
according to the ElektroG (Electrical and Electronic Equipment Act).
You find an online directory of all collection and disposal points here:
https://www.ear-system.de/ear-verzeichnis/sammel-und-
ruecknahmestellen.jsf

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 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.

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 transition connections, PAW HeatBloC®s can also be
mounted on PAW 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 with
contact sensor, adjustable
B Heating pump
C 3-way mixing valve
with adjustable bypass 0-50%
C-1 Flow from the heat generator
C-2 Return to the heat generator
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 from the consumer circuit

3Product description
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3.2 Function
K33 - constant value control circuit 20-50 °C
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 flow temperature. The flow
temperature is adjusted via the thermal mixing
head and a flow contact sensor.
Due to the premixing rate that must be adjusted at
the bypass of the mixing valve, a certain amount
of cold return water is added to the flow water.
The 3-way actuator can thus work over the
whole adjustment range (0-100 %).
Example: Panel heating systems operate on a low
temperature level 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.

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 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 adjusted at the
thermostatic head.
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®.
Note
When the heating circuit is delivered, the bypass is closed.

3Product description
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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.

3Product 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
Malfunction!
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

3Product description
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Proceeding:
•Take off the thermometer handles (A-2, F-2) and remove the insulating front shell.
•Take the group of fittings 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 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.
•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 only after having carried out a pressure test.
Finally mount the thermometer handles (A-2, F-2).

3Product description
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3.2.2 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 with a non-return valve (C-3, opening pressure 50 mm wc) in the return of the mixing
valve. The valves can be opened.
Operation
During operation, the markings must point to "Z".
The check valve and the non-return valve are closed.
Flow only in the direction of the arrow.
Filling, draining, venting
For filling, draining and venting, the markings must be
directed to "A".
The check valve and the non-return valve are open.
Flow in both directions.

4Assembly and installation [specialist]
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4Assembly and installation [specialist]
The HeatBloC®K33 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.
Consumer circuit
Flow
Flow
Heat generator
Return
Return

4Assembly and installation [specialist]
2020/03 9936073x-mub-en – V03 13
•
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.
Consumer circuit
Flow
Flow
Return
Return
Heat generator
Return
Return
Flow
Flow

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.
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 contact thermostat and
the contact sensor (A-3) at the flow.
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

4Assembly and installation [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]
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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 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'' 2155
6 Gasket 1'' for threaded connection 1½'' N00131
7 Pump see following table
8 Insulation for HeatBloC®DN 25 N00016
9 Thermostatic head, 20-50 °C, with contact sensor N00042
10 Brass pipe DN 25, 2 x 1½" ext. thread, 180 mm,
with check valve
N00018
11 Contact thermostat, 20-60 °C N00083
Sealing set for mixing valve 37013
Conversion kit for 3-way mixing valve
"from flow on the left to flow on the right"
340711
Conversion kit for 3-way mixing valve
"from flow on the right to flow on the left"
340722
Item no. heating circuit*
Pump
Item no.
EEI
36073WP6 Wilo Para SC 25/6-43 N00259 < 0,20
36073WP8 Wilo Para SC 25/8-60/O N00271 < 0,20
36073WH6 Wilo-Stratos PICO 25/1-6 E1239625 < 0,20
36073GL9 Grundfos UPML 25-95 Auto E121394 < 0,23
36073GM6 Grundfos UPM3 Auto L 25-70 PP3 N00237 < 0,20
36073GH6 Grundfos Alpha2.1 25-60 N00236 < 0,17

6Technical data
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6Technical data
K33
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 (D-1) 200 mm wc, can be opened
Opening pressure non-return valve (C-3) 50 mm wc, can be opened
Materials
Valves and fittings Brass
Gaskets EPDM
Insulation EPP

6Technical data
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K33
DN 25 (1")
Hydraulics
Maximum pressure 6 bars
Maximum temperature 110 °C
KVS value [m3/h] 3.0
6.1 Pressure drop and pump characteristic curves
Pressure [m wc]
Pressure [kPa]
Flow rate [l/h]

9936073x-mub-en – V03 2020/03
PAW GmbH & Co. KG
Böcklerstraße 11
31789 Hameln - Germany
www.paw.eu
Phone: [phone] - 0
Fax: [phone] - 98