PAW FriwaMega - DN 32 User manual

PAW GmbH & Co. KG
Böcklerstr. 11, D-31789 Hameln, Germany
Phone: [phone], Fax: [phone]
E-mail: [email protected], Web: www.paw.eu
2014/11 99640766x-mub-en – V03 1
Installation and Operation Instructions
Domestic Hot Water Module
FriwaMega – DN 32

1General Information
2 99640766x-mub-en – V03 2014/11
Item no. 99640766x-mub-en - Version V03 – Date 2014/11
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

1General Information
2014/11 99640766x-mub-en – V03 3
Contents
1General Information.........................................................................................................4
1.1 Scope of these instructions ..........................................................................................4
1.2About this product ........................................................................................................5
1.3 Designated use ............................................................................................................5
2Safety instructions ...........................................................................................................6
3Product description..........................................................................................................8
4Dimensioning and planning............................................................................................10
4.1 Dimensioning of the tank............................................................................................11
5Circulation mode ...........................................................................................................12
6Assembly and installation [specialist]..............................................................................13
7Commissioning [specialist].............................................................................................16
7.1 Filling the primary circuit.............................................................................................17
7.2 Commissioning of the controller .................................................................................18
7.3 Maximum withdrawal flow rate ...................................................................................20
7.4 Setting the temperature..............................................................................................22
8Maintenance [specialist].................................................................................................23
9Spare parts [specialist] ..................................................................................................24
9.1 Control and insulation.................................................................................................24
9.2 Hydraulics primary circuit (6407660, 6407661, 6407662)........................................... 25
9.3 Hydraulics secondary circuit FriwaMega without circulation (6407660) ...................... 26
9.4 Hydraulics secondary circuit FriwaMega with circulation (6407661, 6407662)............ 27
10 Technical data...............................................................................................................28
10.1 Pressure drop characteristics .....................................................................................29
11 Commissioning report....................................................................................................30

1General Information
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1General Information
1.1 Scope of these instructions
These instructions describe the installation, commissioning, function and operation of the
domestic hot water module FriwaMega.
The chapters called [specialist] are intended for specialists only.
For other components of the system, such as tanks, controllers or pumps, please observe
the instructions of the corresponding manufacturer.
Item
Item number
Controller
FC3.8
Pump
primary
Circulation
Heat
exchanger
FriwaMega
6407660
Grundfos
UPM XL 25-125
Optional:
Grundfos
UPM2 15-75 CIL2
or
Grundfos
UPML 25-105 N
2 x 60 plates
FriwaMega
with
circulation
6407661
Grundfos
UPM XL 25-125
Grundfos
UPML 25-105 N 2 x 60 plates
6407662
Grundfos
UPM XL 25-125
Grundfos
UPM2 15-75 CIL2 2 x 60 plates
Carefully read these instructions before installation and commissioning.
Save these instructions in the vicinity of the installation for future reference.

1General Information
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1.2 About this product
The domestic hot water module is a premounted fitting group checked for leakage and used
to transfer the heat between the buffer tank and the domestic hot water circuit.
It contains a preset controller and important fittings for the operation of the system:
•Ball valves in the primary circuit
•Piston valves in the secondary circuit
•Pressure relief valve in the secondary circuit
•Premounted controller
•Temperature sensor on the cold water inlet
•Temperature sensors on the heating flow
•Temperature sensor on the domestic hot water outlet
•Flow meter on the domestic hot water outlet
•Fill and drain valve for draining the heat exchangers in the primary and secondary circuit
•Vent valve, primary and secondary, for venting the heat exchangers
1.3 Designated use
The domestic hot water module must only be mounted in heating installations between
the buffer tank and the domestic hot water circuit.
Due to its design, the station must be mounted and operated in a vertical position!
The technical data specified in these instructions must be observed.
Only use PAW accessories with the domestic hot water module.
Improper usage excludes any liability claims.
The wrapping materials are made of recyclable materials and can be disposed of
with recyclable materials.

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
WARNING
Danger of scalding due to hot water!
Undesirable circulation of water in the primary circuit can cause the exit of water
of up to 90 °C at the withdrawal point.
External pumps must not be installed between the service water module
and the buffer tank.
The domestic hot water module must not be connected to a distribution
manifold.
CAUTION
Risk of burns!
The valves, fittings and the pump may heat up to more than 95 °C during
operation.
The insulating shell must remain closed during operation.

2Safety instructions
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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.
NOTICE
Malfunction!
The domestic hot water module must be integrated in the potential equalisation of the
electric installation. This can be guaranteed by establishing a potential equalisation
connection to the main potential connection according to regulations or by the connected
pipe system.

3Product description
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3Product description
Connections primary circuit
1
Flow from the buffer tank (warm)
2
Return to the buffer tank (cold)
Equipment primary circuit
A
Return ball valve
B
Check valve
C
Heat exchanger
D
Temperature sensor Pt1000
E
Drain valve
F
Primary pump
G
Check valve
H
Flow ball valve

3Product description
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Connections secondary circuit
3
Cold water supply
4
Hot water outlet
5
Hot water circulation
Equipment secondary circuit
a
Piston valve hot water circulation
b
Piston valve cold water inlet
c
Pressure relief valve 10 bars, suitable
for domestic hot water
Only for the protection of the station.
Does not replace the pressure relief
valve that has to be mounted on site!
d
Temperature sensor Pt1000
e
Heat exchanger
f + g
FlowSonic 1-130 l/min
h
Drain valve
i
Temperature sensor Pt1000
j
Circulation pump
k
Piston valve hot water outlet

4Dimensioning and planning
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4Dimensioning and planning
The FriwaMega is a domestic hot water module operating on the principle of a flow-type
water heater.
The FriwaMega will only work flawlessly if the installation meets certain requirements.
Please take some time to plan the installation.
WARNING
Danger of scalding due to hot water!
Undesirable circulation of water in the primary circuit can cause the exit of water
of up to 90 °C at the withdrawal point.
External pumps must not be installed between the service water module
and the buffer tank.
The domestic hot water module must not be connected to a distribution
manifold.
Mounting example
FriwaMega with optional circulation set (additionally required, item no. 6404134GH7
or 6404135GH10)