Buderus Logalux PL750 Technische Daten
Documentation for the
contractor
Please read carefully prior
to installation and mainte-
nance
NOTICE TO HOME OWNER/END
USER OF EQUIPMENT
When the anode rod is not profes-
sionally and annually maintained, the
tank will lose its warranty.
Annual service records must be main-
tained and shown in case of a war-
ranty claim along with an original proof
of purchase.
Refer to page 21 to 25 for annual
maintenance instructions to maintain
tank warranty.
In the Commonwealth of Massachu-
setts this tank must be installed by a
licensed plumber.
Installation and Maintenance
Instruction
Solar Combi-Tank
for DHW and Space
Heating
Logalux PL750/2 S
6 720 615 217-00.1RS
6 720 615 191 - 08/2008 US
Table of Contents
Logalux PL750/2 S - Changes may be made following technical improvements!
2
Table of Contents
1 Safety Precautions and symbol clarification 3
1.1 Safety Precautions 3
1.2 Symbol Clarification 3
2 Product Description 4
2.1 Applications 4
2.2 Intended Use 4
2.3 Guidelines for Installations 4
2.4 Product Disposal 4
2.5 Product Packaging 5
2.6 Dimensions and Connections 6
2.7 Technical Specifications 7
2.8 Glossary of measuring points 8
3 Transportation 9
3.1 Transportation Means 9
3.1.1 Transportation with dolly 9
3.1.2 Transportation with overhead crane 10
3.2 Product Placement 10
4TankAssembly 11
4.1 PL750/2S Placement and
Installation 11
4.1.1 Installation of tank feet 11
4.1.2 Installation of tank temperature sensor at
MB2 Measuring Point 11
4.1.3 Installation of tank temperature sensor
for boiler control at MB1 measuring point 12
4.1.4 Installation of tank temperature sensors
M1 – M8 12
4.1.5 Installation of tank kit components 13
4.2 Installation of the Insulation 14
4.3 Water Side Piping Connections 15
4.4 Connections for the KS Solar Pump Station 17
5 Start-up and Shut-down of Tank 18
5.1 Start-up Operations 18
5.1.1 Operational information from contractor 18
5.1.2 System start-up 19
5.2 Decommissioning of the system 19
5.2.1 Shutdown of solar hot water tank 19
5.2.2 Shutdown of heating system in cold
weather conditions 19
5.2.3 Environmental protection 20
6 Maintenance 21
6.1 Preparation of cleaning of solar combi-tank 21
6.2 Cleaning of solar combi- tank 22
6.3 Checking of magnesium anode rod 23
6.4 Replacement of Magnesium Anode Rod 24
6.5 Placing solar tank back in operation after
cleaning 25
7 Replacement Parts 26
7.1 Replacement parts for PL750/2S 26
7.2 Heat Exchanger 27
7.3 Clean-out cover and anode rod assembly for
PL750/2S 29
7.4 Insulation Jacket for PL750/2S Tank 31
1
Safety Precautions and symbol clarification
Logalux PL750/2 S - Changes may be made following technical improvements! 3
1 Safety Precautions and symbol clarification
1.1 Safety Precautions
Placement, remodeling
VFire danger!
Solder and welding operations can result in fire, as the
insulation is combustible.
VThe solar combi-tank can only be installed or renovated
by trained installers.
Installation and Start-up Procedure
VCarefully follow these installation instructions, to
ensure long and trouble-free operation.
VDo not assemble the equipment in a damp environ-
ment.
Function
VFollow these directions for trouble free operation,
installation and maintenance.
VScalding danger!
WARNING! Danger of scalding (> 140 °F) from hot
water. A thermostatic tempering valve must be installed
on domestic hot outlet connection of tank, which is sup-
plied with the KS Solar Pump Station.
Maintenance
VRecommendation for end customer: Please sign
up for an annual service and maintenance contract with
your installer. Make sure to have annual maintenance
performed on your boiler and solar system.
VUse only original Buderus replacement parts.
1.2 Symbol Clarification
Signal words are describing the gravity of each danger
when safety precautions are not followed.
–Caution indicates possibility of light property damage.
–Warning indicates light personal injury or severe prop-
erty damage.
–Danger indicates possible severe personal injury with
potential loss of life.
Guidelines contain important information in order to avoid
or reduce danger to people and equipment.
If the solar storage tank will be installed in Massachusetts,
it must be installed by an a licensed plumber, installer or
dealer who is registered in that state.
Safety warnings are designated in the text
with a triangular warning label and grey color-
ing.
Guidelines in the text are designated with
shown symbol. The text is bracketed between
two horizontal lines.
We reserve the right to change and improve
technical information without prior notice.
It is expected that the installer is a licensed
heating contractor with the knowledge of ac-
cepted industry practices for the installation
and maintenance of the equipment and vari-
ous applications of the equipment involved.
2Product Description
Logalux PL750/2 S - Changes may be made following technical improvements!
4
2 Product Description
2.1 Applications
The solar combi-tank PL750/2S is designed for the heat-
ing and storage of domestic hot water. Applicable guide-
lines for domestic hot water must be followed.
2.2 Intended Use
The solar combi-tank PL750/2S is intended for heating
domestic hot water using a closed solar system filled with
a heat transfer fluid to prevent accidental freezing. The
tank can only be used in a closed system.
Any other use voids the warranty of the tank.
2.3 Guidelines for Installations
2.4 Product Disposal
VDispose of packaging of the solar tank in an environ-
mental friendly fashion.
VA Solar Combi-tank that is being replaced, must be dis-
posed of in a suitable fashion.
Follow all specific state and local codes re-
garding the installation and operation of the
equipment.
All electrical components must be approved
for the US.
2
Product Description
Logalux PL750/2 S - Changes may be made following technical improvements! 5
2.5 Product Packaging
Solar combi- tank PL750/2S consists of:
– Tank shell with corrosion protection
– The cathodic corrosion protection consists of hygienic
Buderus Thermoglaze DuoClean and a magnesium
anode protection system.
– Tank insulation made from non FCKW insulation mate-
rial.
– Solar indirect coil integrated into a heating lance
– Dry well for installation of DHW tank temperature sen-
sor.
– DHW temperature control of the boiler system controls
the DHW temperature.
– Dry well for installation of tank temperature sensor.
– Solar controller regulates the solar system by monitor-
ing the tank and collector temperature sensors.
– Hand-hole cover for service and maintenance access.
– Magnesium anodes.
– Insulation Jacket cover
Fig. 1 PL750/2 S
1Insulation
2Tank shell
3Magnesium anode rod
4Top tank insulation
5Top tank cover
6Dry well sensing port (MB1) for boiler control (FB)
7Stainless steel heating coil
8Dry well sensing port (MB2) for solar control (FSS)
1
2
3
6
7
8
5
4
2Product Description
Logalux PL750/2 S - Changes may be made following technical improvements!
6
2.6 Dimensions and Connections
Fig. 3 Dimensions and Connections PL750/2 S
AW DHW outlet
EK Cold water feed
EZ DHW recirc tapping
RS1 Return tank (Solar)
RS2 Return tank
(Oil, Gas, Condensing boiler for DHW heating)
RS3 Return boiler
RS4 Return heating circuit
RS5 Return solid fuel boiler
RSO Return solar loop
VS1 Supply solar loop
VS2 Supply solid fuel boiler
VS3 Supply tank
(Oil, Gas, condensing boiler for DHW heating)
VS4 Supply tank (heating circuits)
VS5 Supply boiler
VSO Supply solar loop
EL Drain buffer water tank
EL1 Drain DHW tank
MSensoring port, e.g. Temperature control
M1-8 Used sensoring ports according to system design and
used items
MB1 FB sensor port for measuring actual DHW temperature
MB2 FSS sensor port for solar sensor tank bottom
0,8"
AW
AW
6 720 615 217-04.1RS
2
Product Description
Logalux PL750/2 S - Changes may be made following technical improvements! 7
2.7 Technical Specifications
Tank model PL750/2 S
Tank volume total gal 198
l 750
Tank volume DHW gal 79
l 300
Tank volume Buffer gal 119
l 450
Diameter D inch 39
mm 1000
Diameter D (without insulation) inch 31.5
mm 800
Height H inch 76
mm 1920
AW NPT ¾ "
VS1NPT ¾ "
RS1NPT ¾ "
VS2-VS5NPT 1¼ "
RS2-RS5NPT 1¼ "
EL NPT 1¼ "
EL1NPT ¾ "
EK NPT 1 "
EZ NPT ¾ "
Dry weight1)
1) Dry weight, incl. packaging material.
lb. 573
kg 260
Maximum Operating Values:
Temperature Buffer water /solar
loop
°F 230
°C 110
DHW temperature °F 203
°C 95
Operating pressure solar loop psi 116
bar 8
Operating pressure DHW psi 1472)
2) In the Commonwealth of Massachusetts the operating pressure
is limited to 100 psi. Install a 100 psi relief valve.
bar 103)
3) Every installation requires the use of a thermal expansion tank
and pressure/temperature relief valve in the heating system and
solar system.
Operating pressure buffer water psi 43.5
bar 3
Tab. 1 Technical Specifications
2Product Description
Logalux PL750/2 S - Changes may be made following technical improvements!
8
2.8 Glossary of measuring points
Control Type Function/Task Sensor Location
Measuring
Point
With all warm water functions Warm Water Dry Well in Clean-
out Cover
MB1
Integrated '-Solar Controls
(KS0105/KS0110/KS0120), Loga-
matic 2107, R43xx
Component '-Solar Controller,
DBS
Switching the solar system on and off Bottom of tank MB2
3rd Party Controller (STECA) Safeguarding max. temperature Top of tank M, M1
Component '-Flow control of the
PU yes/no
Bypass PU Reference position
for system test run
M4
R43xx and Logamatic-Controllers Control of a system test run in combi-
nation with a hydraulic switch
Reference position
for system test run
M2
Logamatic 2107, R43xx Heating Control Reference position
for solar heating
M5
Control for a solid-fuel heating sys-
tem
Terminate heating of the Solar Combi-
tank
Bottom of tank M7
DBS Switch High-flow/Low-flow Middle of tank M1
All hot water functions Open selection of functions Bottom of tank M6, M8
Tab. 2 Overview sensor ports of PL750/2 S
3
Transportation
Logalux PL750/2 S - Changes may be made following technical improvements! 9
3 Transportation
The solar combi-tank PL750/2S is attached to the pallet
with screws.
Fig. 4 Solar combi-tank on pallet
3.1 Transportation Means
Move the solar combi-tank PL750/2 S with a hand dolly,
a pallet jack, or a crane.
3.1.1 Transportation with dolly
VPlace the hand dolly at the backside of the packaged
tank.
VStrap the tank to the hand dolly.
VMove the tank to its final location.
Danger: Potential danger due to falling over
of tank.
VUse only transport devices that are in safe
operating condition.
VFor lifting only attach the harness to the 2
hooks at the top of the tank.
Danger: Potential for injury due to carrying
of heavy loads.
VAlso move and lift the tank with at least
two people.
Caution: Potential damage due to improper
securing of tank for transport.
VUse suitable tools and strapping materials
when securing and moving the tank with a
transport aid.
VBring in the entire tank in its original pack-
aging to the final installation location. This
will protect the tank better during trans-
port.
A Buderus hand dolly can be purchased
through your local wholesaler.
3Transportation
Logalux PL750/2 S - Changes may be made following technical improvements!
10
3.1.2 Transportation with overhead crane
VPlace the two lifting hooks of the chain into the desig-
nated lifting rings on top of the tank.
VHook the crane chain into the lifting chain.
VProtect the tank from falling and lift the tank to its final
installation location.
VLower the tank carefully to the floor; do not drop down
onto the floor!
One can move the tank inside the building also in a hori-
zontal manner due to possible height restrictions.
VRemove only the tank packaging at the final installation
site.
Fig. 5 Transportation with lifting crane
1Lifting eyes
3.2 Product Placement
VMaintain suggested service access dimensions
(ÆFig. 6).
VPlace tank on a level and sufficiently strong floor.
Clearance to wall
Fig. 6 Recommended minimum clearances
(in inch/mm)
1Solar Combi-tank
2Boiler
Caution: Damage due to internal stresses!
VPlace the tank in a frost free room.
VUse the solar combi-tank ONLY in closed
loop applications.
VOpen expansion tanks can NOT be used
with these solar combi-tanks.
Sufficient overhead space is required for the
removal of the magnesium anode rod as well
as some side clearance.
VVerify for suitable clearance dimensions by
referencing Tab. 1, page 7 and Fig. 6.
20"/500
>4"/>100
16"/400
12
6 720 615 217-08.1RS
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1
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