PAW GmbH & Co. KG
Böcklerstr. 11, D-31789 Hameln, Germany
Phone: +49 (0)5151-9856-0, Fax: +49 (0)5151-9856-98
E-mail: info@paw.eu, Web: www.paw.eu
2018/06 99423x063MGK7-mub-en – V01 1
DN 25
DN 32
Installation and Operation Instructions
CoolBloC - C34
DN 25 / DN 32
1 General Information
2 99423x063MGK7-mub-en – V01 2018/06
Item no. 99423x063MGK7-mub-en – Version V01 – Issued 2018/06
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
D - 31789 Hameln, Germany
1 General Information
2018/06 99423x063MGK7-mub-en – V01 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
4 Assembly and installation [specialist] .............................................................................. 13
4.1 Installation and commissioning of the CoolBloC ......................................................... 13
4.2 Actuator ...................................................................................................................... 16
4.3 Assembly of the actuator for CoolBloC with flow on the right: ..................................... 16
4.4 Assembly of the actuator for CoolBloC with flow on the left: ....................................... 17
5 Scope of delivery [specialist] .......................................................................................... 18
5.1 Spare parts DN 25 ..................................................................................................... 18
5.2 Spare parts DN 32 ..................................................................................................... 19
6 Technical data ............................................................................................................... 20
6.1 Pressure drop and pump characteristic curve C34 - DN 25 / DN 32 ........................... 21
6.2 Determination of the dew point ................................................................................... 22
1 General Information
4 99423x063MGK7-mub-en – V01 2018/06
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, function and the operation
of the mixed CoolBloC C34 DN 25 and DN 32.
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 CoolBloC may only be used in heating circuits taking into consideration the
technical limit values indicated in these instructions.
The CoolBloC must not be used in drinking water applications.
Improper usage of the CoolBloC 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 CoolBloC.
The wrapping materials are made of recyclable materials and can be disposed of
with recyclable materials.
2 Safety instructions
2018/06 99423x063MGK7-mub-en – V01 5
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 of this manual
CAUTION
Personal injury and damage to property!
The CoolBloC must only be used in heating circuits filled with
heating water according to VDI 2035 / Ö-Norm H 5195-1.
The CoolBloC 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.
3 Product description
6 99423x063MGK7-mub-en – V01 2018/06
3 Product description
The CoolBloC C34 is a pre-assembled group of fittings for heating and cooling 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.
The CoolBloC can be mounted with a thermally decoupled wall bracket or alternatively on
a modular PAW distribution manifold. With transition connections, PAW CoolBloCs can also
be mounted on PAW modular distribution manifolds of other dimensions.
3.1 Equipment
A-1
Flow to the consumer circuit
A-2
Plastic thermometer
with immersion sleeve,
integrated in the ball valve (flow)
B
Circulation pump,
approved for cooling operation
C
3-way mixing valve with
adjustable bypass 0-50%
C-1
Flow from the heat / cold generator
C-2
Return to the heat / cold 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
Plastic thermometer
with immersion sleeve,
integrated in the ball valve (return)
F-1
Return from the consumer circuit
3 Product description
2018/06 99423x063MGK7-mub-en – V01 7
3.2 Function
C34 3-way mixing valve with bypass 0-50%
The flow temperature of the heating circuit is
controlled by the integrated mixing valve.
Heated or cooled water from the boiler and cooled
or heated 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 the electric actuator.
Due to the premixing rate that must be adjusted at
the bypass of the mixing valve, a certain amount
of return water is added to the flow water.
The 3-way actuator can thus work over the whole
adjustment range (0-100%), although only a small
amount of water from the boiler is necessary.
Example: Radiant panel heating systems operate
on a low temperature level with small temperature
differences but with 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 significantly
different flow temperature than the
one provided by the boiler
• Consumer circuits with high flow rates,
f.ex. radiant floor heating and radiant
panel heating systems
3 Product description
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3.2.1 Check valve and non-return valve
The CoolBloC 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.
3 Product description
2018/06 99423x063MGK7-mub-en – V01 9
3.2.2 Pump [specialist]
The pump can be completely isolated. It can be replaced and maintained without draining
the heating circuit.
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. Remove the actuator from the mixing valve.
4. Turn the bypass screw of the mixing valve such that the slot is in a vertical position.
5. Turn the nose of the valve cock such that the flow to the pump is closed (for flow on
the right: nose in 5 o'clock position, for flow on the left: nose in 9 o'clock position).
The mixing valve is now closed and drop tight (see figure below).
3.2.3 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.
The mixing valve is equipped with a bypass which must be operated separately. Via this
bypass, cooled water (during heating operation) or heated water (during cooling operation)
from the return is added to the flow of the CoolBloC. This can result in an increase of the
flow rate of the heating circuit.
Mixing valve with flow on the right:
Position 10:
Passage,
no mixing (when the bypass
is closed), flow temperature
consumer = flow temperature
boiler
Position 0:
100% mixing,
flow temperature consumer =
return temperature consumer
Mixing valve position 10
= 12 o'clock position
Mixing valve position 0
= 9 o'clock position
Flow of the pump closed,
5 o'clock position
3 Product description
10 99423x063MGK7-mub-en – V01 2018/06
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.
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 panel
heating systems which require a
very high water flow volume.
Because of the bypass, the flow
temperature decreases and the
control is affected.
2. Check the position of the bypass during operation. Make sure that the flow rate is
sufficient and that the desired temperature is reached.
3 Product description
2018/06 99423x063MGK7-mub-en – V01 11
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) and the extension (3) from the cock rod.
3. Loosen the screws (4).
4. Remove the cover plate (5).
5. Loosen the two screws (6).
6. Remove the front plate (7).
7. Extract the sealing bush (8) and the valve cock (9) from the mixing valve housing.
8. Loosen the screws (11) on the rear side of the mixing valve.
9. Take off the cover (10) on the rear side of the mixing valve and fix it on the other side
of the mixing valve by using the screws (11).
10. Insert the sealing bush (8) and the valve cock (9) into the channel of the mixing valve.
Make sure that the o-ring is positioned correctly on the cover.
3 Product description
12 99423x063MGK7-mub-en – V01 2018/06
11. Fix the front cover (7) by using the screws (6). The stud
bolts (12) for the anti-rotation device must be positioned
on the left (9 o'clock position) in order to mount the
perforated foam insulation.
The countersunk head screws must be inserted at the top
left and at the bottom right (see the marking on the right).
12. Turn the cover plate (5) 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 (5) by using the screws (4).
14. Put the extension (3) and the rotary knob (2) onto the cock rod such that the nose of
the rotary knob points in the direction of the flattening.
15. Fix the extension and the rotary knob with the valve cock (9) with max. 1 Nm by using
the screw (1).
Retrofitting and commissioning of the heating circuit
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 centre of the group
of fittings.
2. Mount the CoolBloC and connect it to the installation.
3. Check all union nuts before commissioning and firmly tighten them if necessary.
4. Mount the insulation only after having carried out a pressure test. Mount the
thermometer handles (A-2, F-2).
5. In a final step, mount the actuator (see chapter 4.2 on page 16).
Mixing valve with flow on the right
Mixing valve with flow on the left
Flow
Flow
4 Assembly and installation [specialist]
2018/06 99423x063MGK7-mub-en – V01 13
4 Assembly and installation [specialist]
The CoolBloC C34 can be mounted on a thermally decoupled wall bracket or on stair bolts.
The wall bracket and the stair bolts with wall plugs 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 CoolBloC
• Option 1:
with stair bolts M8 and wall plugs
(not included in the scope of delivery).
• Option 2:
directly on a wall bracket
(not included in the scope of delivery).
Flow
Flow
Return
Return
Heat / cold generator
Consumer circuit
Return
Return
Flow
Flow
125 mm
Consumer circuit
Heat / cold generator
65 mm
4 Assembly and installation [specialist]
14 99423x063MGK7-mub-en – V01 2018/06
Fig. 1
Fig. 2
Fig. 3
Fig. 4
1. Remove the thermometer handles
(A-2, F-2) (see figure 1).
2. Remove the insulating front shell of
the CoolBloC in the following order:
• Remove the upper insulating element
of the thermometers.
• Remove the insulating element
above the return pipe.
• Remove the lower insulating element.
3. Put the clips in the groove of the ball
valves (see figure 2).
For assembly on a wall bracket:
4. Mount the wall bracket to the wall.
5. To fix the plastic stop bolts, the notch
must point in the direction of the wall
bracket (see figure 3). Screw the stop
bolt on the thread of the wall bracket.
6. Continue with point 9.
For assembly with stair bolts:
7. Mount two stair bolts M8 with a
distance of 125 mm (see figure 4).
The stair bolts must stick out of
the wall by at least 65 mm.
8. Screw the plastic stop bolt with the
groove pointing in the direction of
the wall on the stair bolts.
125 mm
65 mm
4 Assembly and installation [specialist]
2018/06 99423x063MGK7-mub-en – V01 15
Fig. 5
Fig. 6
9. Punch out the holes at the marked areas
in the insulation (see figure 5).
10. Push the insulation on the wall bracket
or on the stair bolts.
11. Now push the fittings on the wall bracket
until the clips snap in.
12. Pull the insulating back shell forward
to the fittings such that they snap in.
13. Connect the cable with the pump and
insert the cable in the cable channel.
14. Connect the CoolBloC to the installation
by using the pipes. The installation to
the piping must be carried out without
any tension.
15. Connect the pump.
16. Carry out a pressure test and
check all thread connections.
17. Mount the insulation in the following
order:
• Insulating element above the return pipe
• Upper insulating element
for the thermometers
• Lower insulating element
18. Push the insulating foam in the opening
of the mixing valve segment until it forms
a flat surface.
19. Mount the anti-rotation devices
with the retaining plate (fig. 6).
20. Mount the thermometers.
4 Assembly and installation [specialist]
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4.2 Actuator
The PAW actuator for weather-compensated control is included in the scope of delivery.
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
4.3 Assembly of the actuator for CoolBloC with flow on the right:
1. Turn the rotary knob of the mixing valve into
position 0. The nose at the rotary knob of
the mixing valve is thus in 9 o'clock position.
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 (fig. 3).
4. Put the actuator onto the rotary knob as shown
in figure 3 and push it on the anti-rotation
devices until the actuator snaps in.
5. Set the actuator back to automatic mode.
Fig. 1
Fig. 2
Fig. 3
blue
blue
blue
red
red
4 Assembly and installation [specialist]
2018/06 99423x063MGK7-mub-en – V01 17
4.4 Assembly of the actuator for CoolBloC with flow on the left:
1. Turn the rotary knob of the mixing
valve into position 10. The nose at
the rotary knob of the mixing valve
is thus in 7:30 o'clock position.
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
(fig. 4).
4. Put the actuator onto the rotary
knob as shown in figure 4 and
push it on the anti-rotation devices
until the actuator snaps in.
5. Set the actuator back to automatic
mode.
Fig. 4
red
5 Scope of delivery [specialist]
18 99423x063MGK7-mub-en – V01 2018/06
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 is placed on the return pipe of the cooling circuit.
5.1 Spare parts DN 25
Item number cooling circuit
Pump
Item no.
EEI
4236063MGK7
Grundfos UPM3K Hybrid 15-70 CIL
E121454701
< 0.20
Accessories
Item number
Sealing set for mixing valve
37013
Actuator 5 Nm, 230 V, 50 Hz
705001
5 Scope of delivery [specialist]
2018/06 99423x063MGK7-mub-en – V01 19
5.2 Spare parts DN 32
Item number cooling circuit
Pump
Item no.
EEI
4239063MGK7
Grundfos UPM3K Hybrid 15-70 CIL
E121454702
< 0.20
Accessories
Item number
Sealing set for mixing valve
41013
Actuator 5 Nm, 230 V, 50 Hz
705001
6 Technical data
20 99423x063MGK7-mub-en – V01 2018/06
6 Technical data
C34
DN 25 (1")
DN 32 (1¼")
Dimensions
Centre distance (1)
125 mm
125 mm
Width insulation (2)
250 mm
250 mm
Height insulation (3)
383 mm
441 mm
Installation length (4)
342 mm
400 mm
Connections
Outlet (A-1, F-1)
1" int. thread
1¼" int. thread
Inlet (C-1, C-2)
1½" ext. thread
2" ext. thread
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
6 Technical data
2018/06 99423x063MGK7-mub-en – V01 21
C34
DN 25 (1")
DN 32 (1¼")
Hydraulics
Max. pressure
6 bars
Minimum temperature*
-10 °C, flowable / conveyable
Max. temperature
110 °C
KVS value [m3/h]
6.0
10.1
* In general, the cooling water temperature must not fall below 15 - 16 °C in order to minimise
the formation of condensation water (shortfall of the dew point temperature) at the system
components. The diagram on page 22 allows a rough estimation to know if the dew point
temperature is undercut.
6.1 Pressure drop and pump characteristic curve C34 - DN 25 / DN 32
Pressure [m wc]
Pressure [kPa]
Flow rate [l/h]
6 Technical data
22 99423x063MGK7-mub-en – V01 2018/06
6.2 Determination of the dew point
Example: Room air temperature 22 °C, relative air humidity 55%,
dew point temperature 12.5 °C
Dew point temperature [°C]
Room air temperature [°C]
Relative air humidity [%]
6 Technical data
2018/06 99423x063MGK7-mub-en – V01 23
99423x063MGK7-mub-en – V01 2018/06
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
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