PAW SolarBloC midi 2S Installation and operation manual

PAW GmbH & Co. KG
Böcklerstr. 11, 31789 Hameln, Germany
Phone: [phone], Fax: [phone]
E-Mail: [email protected], Web: www.paw.eu
2020/10 997655810x-mub-en – V08 1
Installation and Commissioning
Instructions
SolarBloC midi 2S – DN 20

1 General Information
2 997655810x-mub-en – V08 2020/10
Item no. 997655810x-mub-en – Version V08 – Issued 2020/10
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

1 General Information
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Contents
1General Information.........................................................................................................4
1.1 About these instructions ...............................................................................................4
1.2 About this product ........................................................................................................4
1.3 Designated use ............................................................................................................5
2Safety instructions ...........................................................................................................6
3Mounting and installation [specialist]] ...............................................................................8
4Commissioning [specialist].............................................................................................11
4.1 Flushing and filling the solar circuit............................................................................. 12
4.2 Preparations before flushing....................................................................................... 14
4.3 Flushing and filling .....................................................................................................15
4.4 Setting the solar installation........................................................................................ 18
5Maintenance [specialist].................................................................................................19
5.1 Draining the solar system...........................................................................................19
5.2 Deinstallation.............................................................................................................. 20
6Spare parts [specialist] ..................................................................................................21
6.1 2-line station............................................................................................................... 21
6.2 1-line station............................................................................................................... 23
7Technical data and pressure drop characteristic curve ....................................................25
8Function of the check valves [Expert] .............................................................................27
9Commissioning report....................................................................................................29
10 Disposal........................................................................................................................30

1 General Information
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1General Information
Carefully read these instructions before installation and commissioning.
Save these instructions in the vicinity of the installation for future reference.
1.1 About these instructions
These instructions describe the installation, commissioning, function and operation of the
3-line solar stations SolarBloC midi 2S (DN 20) for installations with 2 storage tanks.
The chapters called [specialist] are intended for specialists only. For other components of the
solar installation, such as collectors, storage tanks, expansion tanks
and controllers, please observe the instructions of the corresponding manufacturer.
1.2 About this product
The station is a premounted group of fittings checked for tightness and used to circulate the
solar fluid in the solar circuit. It is mounted on two wall brackets and fixed with clips.
The station contains important components and safety devices for the operation of the
installation:
•Three ball valves in the flow line and in the return lines
•Three check valves (integrated in the ball valves)
•Three thermometers in the flow line and in the return lines
•Pressure gauge to display the installation pressure
•Two flow meters to display the flow rate
•Two ball valves to reduce the flow rate
•Solar pressure relief valve
•Airstop for an easy venting
•Flush and fill valves

1 General Information
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1.3 Designated use
The solar station may only be used in solar thermal systems as a pump station in the solar
circuit, taking into consideration the technical limit values indicated in these instructions.
Due to its design, the station may only be installed and operated as described in this manual!
Improper usage excludes any liability claims.
Only use PAW accessories with the solar station.
Under the influence of solar radiation, the collectors will heat up
considerably. The solar fluid in the solar circuit may heat up to more than
100 °C. Only flush and fill the solar circuit when the collector
temperatures are below 70 °C.

2 Safety 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 mentioned in these instructions
WARNING
Danger of scalding due to the escape of hot fluids!
With pressure relief valves, there is a risk of scalding due to the escape of vapour
or hot fluid.
Please ensure for each pressure relief valve that no personal injury or material
damage may occur due to possibly escaping medium.
Install a discharge line.
Observe the instructions regarding the pressure relief valve.
The pressures calculated by the installation planner for the expansion tank
and the operating pressure of the installation must be set.
CAUTION
Risk of burns!
The valves and fittings and the pumps can become heated up to more than
100 °C during operation.
The insulating shells must remain closed during operation.

2 Safety instructions
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CAUTION
Personal injury and material damage due to overpressure!
Closing both ball valves in the primary circuit will separate the safety group from
the heat exchanger. A rise in temperature in the storage tank may result in high
pressures, which may lead to personal injury and material damage!
Only close the ball valves for service and maintenance.
ATTENTION
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.

3 Mounting and installation [specialist]]
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3Mounting and installation [specialist]]
ATTENTION
Material damage due to high temperatures!
Since the solar fluid near the collector can be very hot, the group of fittings
must be installed at a sufficient distance from the collector field. It may be necessary to install
an intermediate tank in order to protect the expansion tank.
Not included in the scope of delivery!
Accessories: compression fitting
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 body 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 body of the compression
fitting ⑤ against distort in order to avoid
damaging the sealing ring.

3 Mounting and installation [specialist]]
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1. Remove the station from the packaging.
2. Take off the insulating front shells.
3. Screw the connecting piece [6] onto the
return connections of the 2-line station and
the 1-line station (see figure).
4. Copy the mounting holes next to the
thermometers of the solar station to the
mounting surface.
5. Drill the holes and mount the solar station
to the wall with appropriate wall plugs and
screws.
6. Connect the solar station to the installation
by using the pipes
①return to the collector field
⑨return from storage tank 2
③return from storage tank 1
④flow towards storage tank 1 and 2
⑤flow from the collector field
All thread connections have ¾" internal threads.

3 Mounting and installation [specialist]]
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Optionally available!
7. Connect the pipe for the expansion tank
below the pressure gauge [7.4] and fix
the bracket for the expansion tank.
8. Adapt the initial pressure of the expansion
tank to the system and connect the
expansion tank. Observe the separate
instructions for the expansion tank!
9. Check all thread connections and tighten
them if necessary.
WARNING
Risk to life and limb due to electric shock!
Prior to commencing electrical work on the controller, pull the mains plug!
Only after completing all installation work as well as the flushing and filling,
the mains plug of the controller can be plugged into a socket.
This avoids an unintentional start of the motors.
10. Connect the pumps and the sensors to the
controller.
The assembly of the solar station is now
completed and the station can be put into
operation.