Rotex V26P Technical manual

For certified companies
ROTEX Solaris
Planning and installation
instructions
DrainBack solar system
Valid for the following components
- Solaris V21P
- Solaris V26P
- Solaris H26P
- Solaris assembly packages
GB
Edition 09/2016
DB
(Drain Back)

Table of contents
2FA ROTEX Solaris DrainBack - 09/2016
1 General information. . . . . . . . . . . . . . . . . . . 3
1.1 Refer to the manual . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Warranty conditions . . . . . . . . . . . . . . . . . . . . . . 3
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Warning signs and explanation of symbols . . . . 4
2.1.1 Meaning of the warnings . . . . . . . . . . . . . . . . . . . . .4
2.1.2 Order number . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.1.3 Handling instructions. . . . . . . . . . . . . . . . . . . . . . . .4
2.2 Avoiding danger . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 Use as intended . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.4 Instructions for operating safety. . . . . . . . . . . . . 5
2.4.1 Working on the roof. . . . . . . . . . . . . . . . . . . . . . . . .5
2.4.2 Before working on the heating system . . . . . . . . . .5
2.4.3 Electrical installation . . . . . . . . . . . . . . . . . . . . . . . .5
2.4.4 Installation room, water quality, heating and
sanitary connection . . . . . . . . . . . . . . . . . . . . . . . . .5
2.4.5 Instruct the owner . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.4.6 Relevant national regulations . . . . . . . . . . . . . . . . .5
3 Product description. . . . . . . . . . . . . . . . . . . 6
3.1 Construction and components of the
Solaris system (unpressurised system) . . . . . . . 6
3.2 Brief description . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 System components for pressure-less systems. 7
3.3.1 System components for all systems . . . . . . . . . . . .7
3.3.2 System components for roof-mounted systems
(ADM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
3.3.3 System components for in-roof systems (IDM) . . .11
3.3.4 System components for flat roof systems (FDM) .13
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.1 Transport and storage . . . . . . . . . . . . . . . . . . . 16
4.1.1 Transport. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
4.1.2 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
4.2 System layouts. . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2.1 Parallel connection . . . . . . . . . . . . . . . . . . . . . . . .17
4.2.2 Series connection . . . . . . . . . . . . . . . . . . . . . . . . .17
4.3 Laying the connecting pipe . . . . . . . . . . . . . . . 18
4.4 Mounting the flat solar panels . . . . . . . . . . . . . 20
4.5 Connecting the pressure-less Solaris system
hydraulically . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.6 Installing the equipotential bonding terminal . . 24
4.7 Installing the solar panel temperature sensor . 24
5 Start-up and taking out of service . . . . . . 25
5.1 Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.2 Decommissioning. . . . . . . . . . . . . . . . . . . . . . . 25
5.2.1 Temporary shutdown . . . . . . . . . . . . . . . . . . . . . .25
5.2.2 Final shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . .25
6 Technical data . . . . . . . . . . . . . . . . . . . . . . 27
6.1 Product Fiche. . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.2 General technical information . . . . . . . . . . . . . 27
6.3 Roof-mounted system – Max. permissible
snow load (roof-mounted)
as per EN 1991-1-3 . . . . . . . . . . . . . . . . . . . . . 28
6.4 Flat roof system – Required ballast weights
(flat roof mounting) as per EN 1991-1-4. . . . . . 29
6.5 Flat roof system – Shading . . . . . . . . . . . . . . . 30
7 List of keywords . . . . . . . . . . . . . . . . . . . . 31

1 xGeneral information
FA ROTEX Solaris DrainBack - 09/2016 3
1 General information
1.1 Refer to the manual
These instructions are a >> translation of the original
version << in your language.
All procedures required for installation, start-up, operation and
adjustment of the system are described in this instruction manual
and associated documents. Detailed information on the con-
nected components of your heating system is given in the rel-
evant manuals.
●Work on the ROTEX Solaris system (such as hydraulic and
electrical connection and initial start-up) is only to be carried
out by persons who are authorised and who have success-
fully completed qualifying technical or vocational training in
the respective activity and who have taken part in profes-
sional advanced training courses recognised by the
competent authority. This especially includes heating
specialists who have experience in the proper installation and
maintenance of heating and solar systems due to their
technical training and specialist knowledge.
●Please read this manual carefully and thoroughly before
proceeding with the installation and initial start-up or modifi-
cation of the system.
●Comply strictly with warning instructions.
Relevant documents
Documents listed below are part of the technical documentation
of the ROTEX solar system and therefore must be observed. The
documents are part of the scope of delivery of the respective
components.
– ROTEX Solaris RPS4: Operating and installation instructions
– ROTEX hot water storage tank (Sanicube Solaris / Hybrid-
Cube, GCU compact or HPSU compact): Operating and
installation instructions
– Quick instructions for solar panel assembly and the requisite
assembly materials, which accompany the respective con-
struction kits, for roof-mounted, in-roof and flat roof mounting
When connecting to an external heat generator or storage tank
which is not included in the scope of delivery, the individual asso-
ciated operating and installation instructions apply.
1.2 Warranty conditions
The legal guarantee conditions fundamentally apply. Our war-
ranty conditions beyond that can be found online on your sales
presentative's webpage.

4FA ROTEX Solaris DrainBack - 09/2016
2 xSafety
2 Safety
2.1 Warning signs and explanation of
symbols
2.1.1 Meaning of the warnings
Warnings in this manual are classified according
into their severity and probability of occurrence.
Special warning signs
Some types of danger are represented by
special warning symbols.
2.1.2 Order number
References to order numbers can be recognised
from the goods symbol .
2.1.3 Handling instructions
●Handling instructions are shown as a list.
Actions of which the sequential order must be
maintained are numbered.
Results of actions are identified with an
arrow.
2.2 Avoiding danger
ROTEX solar installations are state-of-the-art
and are built to meet all recognised technical
requirements. However, improper use may result
in serious physical injuries or death, as well as
property damage. To prevent such risks, install
and operate the ROTEX solar installations only:
– as stipulated and in perfect condition,
– with an awareness of safety and the hazards
involved.
This assumes knowledge and use of the con-
tents of this manual, of the relevant accident pre-
vention regulations as well as the recognised
safety-related and occupational health rules.
2.3 Use as intended
The ROTEX solar system may only be used for
solar-supported heating of hot water systems.
The ROTEX solar system must be installed, con-
nected and operated only according to the in-
structions in this manual.
Any other use outside the intended use is con-
sidered as improper. The operator alone shall
bear responsibility for any resulting damage.
Intended use also includes compliance with the
maintenance and service conditions. Re-
placement parts must at least satisfy the tech-
nical requirements defined by the manufacturer.
This is the case, for example, with original spare
parts.
DANGER!
Draws attention to imminent danger.
Disregarding this warning can lead to serious
injury or death.
WARNING!
Indicates a potentially dangerous situation.
Disregarding this warning may result in serious
physical injury or death.
CAUTION!
Indicates a situation which may cause possible
damage.
Disregarding this warning may cause damage
to property and the environment.
This symbol identifies user tips and par-
ticularly useful information, but not warn-
ings or hazards.
Electric current
Risk of burning or scalding
Danger of falling
Danger of falling parts

2 xSafety
FA ROTEX Solaris DrainBack - 09/2016 5
2.4 Instructions for operating safety
2.4.1 Working on the roof
●Installation work on the roof may only be
carried out by authorised and trained persons
(heating technicians, roofers, etc.) in
compliance with the relevant Accident
Prevention Regulations.
●Material and tools must be secured against
falling down.
●Barriers must be erected to prevent persons
from entering the area below the roof where
the work is being carried out.
2.4.2 Before working on the heating system
●All work on the heating system (such as instal-
lation, connection and start-up) may only be
carried out by authorised and trained heating
technicians.
●Switch off the main switch and secure it
against unintended switching on when
carrying out any work on the heating system.
2.4.3 Electrical installation
●Electrical installations must only be carried
out by electrical engineers and in compliance
with valid electrical guidelines as well as the
specifications of the energy supply company
(EVU).
●Connect the mains in accordance with
IEC 60335-1 via a separator device which
exhibits contact separation in all poles with a
contact opening distance that provides full
disconnection in accordance with the condi-
tions of overvoltage category III and a residual
current circuit breaker (RCD) with a reaction
time ≤0.2 s.
●Compare the mains voltage (230 V, 50 Hz)
indicated on the nameplate with the supply
voltage before connecting to the mains.
●Before beginning work on live parts,
disconnect them from the power supply
(switch off main switch, remove fuse) and
secure against unintentional restart.
●Equipment covers and service panels must be
replaced as soon as the work is completed.
2.4.4 Installationroom,waterquality,heating
and sanitary connection
The requirements on installing the hot water
storage tank (Sanicube Solaris, Hybridcube,
GCU compact or HPSU compact,), on the water
quality as well as the heating and sanitary con-
nection are described in detail in the instructions
for the hot water tank. It is essential they are
complied with.
2.4.5 Instruct the owner
●Before you hand over the heating system,
explain to the user/owner how to operate and
check the heating system.
●Document the handover by filling out the
installation and instruction forms together with
the owner and sign them.
2.4.6 Relevant national regulations
●DIN 1055-4: 2005/ EN 1991-1-4 Wind actions
●DIN 1055-5: 2005/ EN 1991-1-3 Snow loads
●DIN 18338 Roofing and Roof-Sealing Work
●DIN 18451 Scaffolding Work
●DGUV Information 208-016
●DGUV Information 201-054
●DGUV Regulation 112-198
The accident prevention regulations must be
heeded when working on the roof.

6FA ROTEX Solaris DrainBack - 09/2016
3 xProduct description
3 Product description
3.1 Construction and components of the Solaris system (unpressurised system)
1 Cold water connection pipe
2 Hot water distribution pipe
3 Filling and draining ball valve (accessory KFE BA,16 52 15)
4 Solaris R4 control unit
5 Solar return flow pipe (bottom on the solar panel)
6 Solar inflow pipe (top on the solar panel)
7 Solar panel array
8 Solar inflow layering pipe
9 Solar return flow connection
A Hot water zone
B Solar zone
FLS Solaris FlowSensor (flow rate measurement)
PSSolaris operating pump
RPS4Control and pump unit
TKSolaris solar panel temperature sensor
TRSolaris return flow temperature sensor
TSSolaris storage tank temperature sensor
TVSolaris inflow temperature sensor
GCU compact
Gas Combi Unit
HPSU compact
Solar tank with integrated interior heat pump unit
SCS/HYC
Sanicube energy storage tank Solaris / HybridCube
Fig. 3-1 Standard design of a ROTEX Solaris system (ROTEX recommends a two-way connection)
M
A
B
AB
M
B
A
AB
P
S
SCS/HYC
≤12 m
444
8
999
FLS
TV
A
B
1
22 2
TK
TKTK
>2%
≥0,5 %
666
7
555
T
S
T
R
1
GCU compact HPSU compact
TV
P
S
A
B
T
S
T
R
1
333
88
FLS
FLS
PS
T
S
T
R
TV
RPS4 RPS4 RPS4
M
A
B
M
AB

3 xProduct description
FA ROTEX Solaris DrainBack - 09/2016 7
3.2 Brief description
The ROTEX solar system is a thermal solar system for supplying
hot water for consumption and solar support.
Operating mode
The Solaris V21P, V26P and H26P high performance flat solar
panels convert solar radiation into heat with a high degree of ef-
ficiency. The heat carrying medium is water with which the
storage tanks are filled in accordance with the associated instal-
lation instructions.
As soon as the solar panels have reached a useful temperature
level, the buffer water in the storage tank (which is not under
pressure) is pumped directly through the panels. With insufficient
panel temperature, the circulation pump is switched off and the
system is drained automatically. This operating mode has
several advantages:
– High operating safety as there are no components (such as
expansion vessel, safety valve, vent valves) sensitive to dam-
age or interference
– Excellent heat transfer and heat storage capacity (system
works without antifreeze agents)
– Minimum maintenance requirements
– Frost proof
– No additional solar heat exchanger required
– No stagnation problems
Modular design
The system consists of several pre-assembled modules. Plug-in
technology and a high degree of pre-assembly ensure fast and
simple system installation.
outer layer of storage tank
The following storage tanks can be used for the ROTEX solar
system:
– ROTEX Sanicube Solaris (SCS): Highly thermally insulated,
pressure-less solar stratified tank (with possibility to connect
to a ROTEX condensing boiler).
– ROTEX HybridCube (HYC): Highly thermally insulated, pres-
sure-less solar stratified tank (with possibility to connect to a
ROTEX air/water heating pump).
– ROTEX GCU compact: Solar stratified tank with integrated
gas condensing boiler.
– ROTEX HPSU compact: Solar stratified tank with integrated
indoor unit of an air/water heating pump.
Electronic control
The fully electronic ROTEX Solaris R4 control unit ensures op-
timum utilisation of the solar heat (hot water heating, heating
support) and the observance of all safety-relevant aspects. All
parameters needed for trouble-free operation have been preset
at the factory.
3.3 System components for pressure-less
systems
3.3.1 System components for all systems
High performance flat solar panels
V21P ( 16 20 12)
H x W x D: 2000 x 1006 x 85 mm, weight: approx. 35 kg
V26P ( 16 20 10)
H x W x D: 2000 x 1300 x 85 mm, weight: approx. 42 kg
H26P ( 16 20 11)
H x W x D: 1300 x 2000 x 85 mm, weight: approx. 42 kg
Solar panel mounting rails FIX-MP
FIX-MP100 ( 16 20 66) for a V21P flat solar panel
FIX-MP130 ( 16 20 67) for a V26P flat solar panel
FIX-MP200 ( 16 20 68) for an H26P flat solar panel
The pressure-less system (DrainBack) must only be
used with the RPS4 control and pump unit (RPS3 25M
for large systems).
Prerequisite for fault-free operation in the DrainBack system is
that the connecting pipes are laid with a consistent gradient (at
least 2 %) and, with two-way connection, the bottom edges of
the solar panel with constant gradient to the return flow con-
nection or with equilateral connection, mounted horizontally.
Design, functionality, start-up and operation of the stor-
age tanks and other components not mentioned in
chap. 3.3 Solaris are not described in these instruc-
tions. Detailed information on these components can be
found in the associated operating and installation instructions.
The handling instructions and descriptions mentioned in these
instructions basically apply to all ROTEX storage tanks that can
be used in this solar system, even if only one type (e.g. SCS) is
described for illustrative purposes. If there are variances to other
storage tanks, special reference is made.
1a High performance flat solar panel V21P / V26P
1b High performance flat solar panel H26P
Fig. 3-2 Flat solar panel
2a Mounting profile rail
2b Solar panel securing clips
Fig. 3-3 FIX-MP
B
B
T
1a
V21P
V26P H26P
H
H
1b
2a (2x)
2b (2x)

8FA ROTEX Solaris DrainBack - 09/2016
3 xProduct description
Solar panel connectionSolaris
FIX-VBP ( 16 20 16)
Connection pipes CON 15 and CON 20
CON 15 ( 16 47 32), L=15 m
and
CON 20 ( 16 47 33), L=20 m
Connecting pipes between solar panel array and RPS4 (heat-in-
sulated inflow pipe and return flow pipe (Al-PEX compound pipe)
with integrated sensor cable).
Extension kits for connection pipe CON X
CON X 25 ( 16 42 61), L=2.5 m
CON X 50 ( 16 42 62), L=5 m
CON X 100 ( 16 42 63), L=10 m
Heat insulated feed and return line with integrated sensor cable,
pipe clamps and connecting fittings.
Extension kit for feed line CON XV
CON XV 80 ( 16 42 64), L=8 m
UV-resistant thermally insulated feed line with integrated sensor
cable, pipe clamps, cable connection fitting and connecting
fitting.
Vessel holder set (TS) for CON 15 and CON 20
connecting pipes
TS ( 16 42 45), L=1.30 m
Vessel holders for supporting CON 15 and CON 20 connecting
pipes (avoidance of water sacks).
3a Double terminal block for solar panel fastening
3b Mounting profile connector
3c Compensator for solar panel connection with mounting support
Fig. 3-4 FIX-VBP
Fig. 3-5 CON 15 / CON 20
Fig. 3-6 CON X (optional)
3a (2x) 3b (2x) 3c (2x)
L
Fig. 3-7 CON XV (optional)
4a Vessel holders
4b Quick instructions
Fig. 3-8 TS (optional)
4a (5x)
4b

3 xProduct description
FA ROTEX Solaris DrainBack - 09/2016 9
3.3.2 System components for roof-mounted systems (ADM)
Roof penetration packs, roof-mounted
RCAP ( 16 20 33) (anthracite)
RCRP ( 16 20 34) (brick-red)
Solar panel row connector
CON RVP ( 16 20 35)
For connecting two solar panel rows one above the other.
On-roof mounting packs
FIX-ADDP ( 16 20 85) for roof tiles/shingles
FIX-ADS ( 16 47 23) for flat roofing (e.g. slate)
5a Solar panel connecting elbow, return flow
5b Solar panel connecting elbow, inflow
5c Sealing plugs
5d Transition fitting
5e-g Pipe clamps with hangar bolts
5h Single terminal block with equipotential bonding terminal
5i Single terminal block
5j Cable tie
5k Solar panel temperature sensor
5l-n Extraction tool with inserts for Ø 15 mm and Ø 18 mm
5o Planning and installation instructions
5p Quick instructions
5q Cable connection fitting
5r Roof penetration box
5s Foam wedge
5v HT-Armaflex ø22x13 UV-resistant (2 m)
Fig. 3-9 RCAP, RCRP
5a
(ø18)
5r (2x)
5c
(2x)
5d
5l
5m
5n
5s (2x)
5g
(12x) 5f
(8x)
5e
(4x)
5o
5q
5j
(5x)
5k
5p
5b
(ø15)
5i
(3x)
5h
5v
5i Single terminal block
5h Single terminal block with equipotential bonding terminal
5c Sealing plugs
5a Solar panel connecting elbow
5w 1 m heat-insulated Al-PEX compound pipe
Fig. 3-10 CON RVP
12a Roof mounting hook
12b Packing plate 2 mm
12c Packing plate 5 mm
12d Hexagon wood screws M8 x100
12e Quick instructions
Fig. 3-11 FIX-ADDP
12f Roof mounting hook
12g Quick instructions
Fig. 3-12 FIX-ADS
5h ( x)2
5i ( x)2
5a
5w
5a
5c
(2x)
12d (4x)
12b
(2x)
12a
(2x)
12c
(2x)
12e
12g
12f
(4x)

10 FA ROTEX Solaris DrainBack - 09/2016
3 xProduct description
FIX-WD ( 16 47 03) for corrugated roofing
FIX-BD ( 16 47 04) for folded sheet metal roofing
12h Mounting profile beam
12i Quick instructions
Fig. 3-13 FIX-WD
12j Mounting profile beam
12k Quick instructions
Fig. 3-14 FIX-BD
12h
4(x)
12i
12j
4(x)
12k

3 xProduct description
FA ROTEX Solaris DrainBack - 09/2016 11
3.3.3 System components for in-roof systems (IDM)
Solar panel connection set
RCIP ( 16 20 37)
Solar panel row connector
CON RVP ( 16 20 35)
For connecting two solar panel rows one above the other.
5a Solar panel connecting elbow, return flow
5b Solar panel connecting elbow, inflow
5c Sealing plugs
5d Transition fitting
5e-g Pipe clamps with hangar bolts
5h Single terminal block with equipotential bonding terminal
5i Single terminal block
5j Cable tie
5k Solar panel temperature sensor
5l-n Extraction tool with inserts for Ø 15 mm and Ø 18 mm
5o Planning and installation instructions
5p Quick instructions
5q Cable connection fitting
Fig. 3-15 RCIP
5i Single terminal block
5h Single terminal block with equipotential bonding terminal
5c Sealing plugs
5a Solar panel connecting elbow
5w 1 m heat-insulated Al-PEX compound pipe
Fig. 3-16 CON RVP
5h ( x)2
5i ( x)2
5a
5w
5a
5c
(2x)

12 FA ROTEX Solaris DrainBack - 09/2016
3 xProduct description
In-roof mounting packs
Basic pack IB V21P ( 16 20 17)
for two V21P flat solar panels
Basic pack IB V26P ( 16 20 19)
for two V26P flat solar panels
Expansion package IE V21P ( 16 20 18)
for each further V21P flat solar panel (3 to 5)
Expansion package IE V26P ( 16 20 20)
for each further V26P flat solar panel (3 to 5)
Expansion package FIX-IES ( 16 46 16)
for flat roofing (e.g. slate) and two flat solar panels
10a Upper left cover plate
10b Upper right cover plate
10c Upper cover strip
10d Left side part
10e Right side part
10f Plug-in strip
10g Bottom left drip-off sheet
10h Bottom right drip-off sheet
10i Bottom left sight guard plate
10k Bottom right sight guard plate
10l Accessory bag
10m Accessory bag
10n Locking plate
10o Nail
10p Holder for drip-off sheets
10q Tapping screw
10r Metal screw
10t Foam adhesive strips
10u Quick instructions
Fig. 3-17 IB V21P / IB V26P
10a
10c
10f 10k
10h
10e
10d
10l
10i
10g
10p (6x)
10r
10q (14x)
10m (2x)
10t (2x)
10b
10u
10n (10x)
10o (12x) 11a Upper middle cover plate
10c Upper cover strip
10f Plug-in strip
11b Bottom middle drip-off sheet
11c Bottom middle sight guard plate
10p Holder for drip-off sheets
10q Tapping screw
10r Metal screw
10s Accessory bag
10t Foam adhesive strips
Fig. 3-18 IE V21P / IE V26P
Fig. 3-19 FIX-IES
10c
10f
11a
11c 11b
10p (3x)
10r
10q (5x)
10s
10t (2x)

3 xProduct description
FA ROTEX Solaris DrainBack - 09/2016 13
3.3.4 System components for flat roof systems (FDM)
Solar panel connection kit and roof transit for two-way
connection of 2 solar panels
RCFP ( 16 20 38)
CON FE roof penetration box ( 16 47 09)
for two-way connection (essential from 3 panels upwards)
5a Solar panel connecting elbow, return flow
5b Solar panel connecting elbow, inflow
5c Sealing plugs
5d Transition fitting
5e-g Pipe clamps with hangar bolts
5h Single terminal block with equipotential bonding terminal
5i Single terminal block
5j Cable tie
5k Solar panel temperature sensor
5l-n Extraction tool with inserts for Ø 15 mm and Ø 18 mm
5o Planning and installation instructions
5p Quick instructions
5q Cable connection fitting
13a CON F roof penetration box
5u HT-Armaflex ø18x13 UV-resistant (6.5 m)
5v HT-Armaflex ø22x13 UV-resistant (2 m)
Fig. 3-20 RCFP
5a
(ø18)
5c
(2x)
5d
5l
5m
5n
5g
(12x) 5f
(8x)
5e
(4x)
5o
5q
5j
(5x)
5k
5p
5b
(ø15)
5i
(3x)
5h
5v 13a
5u
13a CON F roof penetration box
13b Sealing unit for screwed cable fitting M40
13c Sealing unit for screwed cable fitting M16
13d Sealing unit for screwed cable fitting M32
Fig. 3-21 CON FE
13a
13b
13c
13d

14 FA ROTEX Solaris DrainBack - 09/2016
3 xProduct description
Flat roof mounting packs
Basic package FB V26P ( 16 20 58)
for two V26P flat solar panels
Expansion package FE V26P ( 16 20 59)
for each further V26P flat solar panel (3 to 5)
GE1 Pre-mounted basic element
6a Basic rail V26P
6b Bearing rail V26P
6c Telescopic rail, outer V26P
6d Telescope rail, inner V26P
6e Cross brace V26P
6f Diagonal brace V26P
6g Accessory bag V26P
6h Terminal M8
6i Hexagon screw M8
6k Hexagon nut M8
6m Hexagon nut M8 with locking serration
6n Washer
6o Round head screw M8
6p Quick instructions
Fig. 3-22 Flat roof frame, basic package FB V26P
6g
(8x)
6f
(2x)
6e
66c+ d
6a
6p
(6x)
(6x)
(10x)
(4x)
(16x)
(16x)
6h
6n
6k
6i
6m
6o
6b
GE1 (3x)
GE1 Pre-mounted basic element
6a Basic rail V26P
6b Bearing rail V26P
6c Telescopic rail, outer V26P
6d Telescope rail, inner V26P
7e Cross brace V26P extension
7g Accessory bag V26P
6h Terminal M8
6i Hexagon screw M8
6k Hexagon nut M8
6m Hexagon nut M8 with locking serration
6n Washer
6o Round head screw M8
Fig. 3-23 Flat roof frame, expansion package FE V26P
7g
(x)4
7e (x)2
(x)2
(x)4
(x)2
(x)8
(x)8
6h
6n
6k
6i
6m
6o
66c+ d
6a
6b
GE1

3 xProduct description
FA ROTEX Solaris DrainBack - 09/2016 15
Basic package FB H26P ( 16 20 60)
for one H26P flat solar panel
Expansion package FE H26P ( 16 20 61)
for each further H26P flat solar panel (2 to 5)
GE2 Pre-mounted basic element
8a Basic rail H26P
8b Bearing rail H26P
8c Telescopic rail, outer H26P
8d Telescope rail, inner H26P
8e Cross brace H26P
8f Diagonal brace H26P
8g Accessory bag H26P
6h Terminal M8
6i Hexagon screw M8
6k Hexagon nut M8
6m Hexagon nut M8 with locking serration
6n Washer
6o Round head screw M8
6p Quick instructions
Fig. 3-24 Flat roof frame basic package FB H26P
8 +8dc 8b
8a
8g
(x)2
8f
8e
8p
(x)4
(x)4
(x)7
(x)3
(x)4
(x)4
6h
6n
6k
6i
6m
6o
GE2 (2x)
GE2 Pre-mounted basic element
8a Basic rail H26P
8b Bearing rail H26P
8c Telescopic rail, outer H26P
8d Telescope rail, inner H26P
9e Cross brace H26P extension
9f Diagonal brace H26P
8g Accessory bag H26P
6h Terminal M8
6i Hexagon screw M8
6k Hexagon nut M8
6m Hexagon nut M8 with locking serration
6n Washer
6o Round head screw M8
Fig. 3-25 Flat roof frame expansion package FE H26P
8 +8dc 8b
8a
8g
(x)2
9f
9e
(x)4
(x)4
(x)7
(x)3
(x)4
(x)4
6h
6n
6k
6i
6m
6o
GE2

16 FA ROTEX Solaris DrainBack - 09/2016
4 xInstallation
4 Installation
These instructions describe the solar panel fastening and the hy-
draulic connection of the pressure-less Solaris system as well as
the associated electrotechnical measures.
All assembly information for the sub-construction or the roof
integration of the ROTEX Solaris flat solar panels are given in the
respective quick instructions which accompany the
●roof-mounted assembly packages
●in-roof assembly packages
●flat roof assembly packages
.
4.1 Transport and storage
4.1.1 Transport
The ROTEX Solaris flat solar panels are delivered on a pallet,
wrapped in film. All industrial trucks, such as lifting trucks and
forklift trucks, are suitable for transporting it. Other ROTEX So-
laris components are delivered packaged separately.
4.1.2 Storage
The following should be taken into account when storing ROTEX
Solaris system components:
●All components should be stored in dry and frost-protected
rooms only.
●Dismantled hydraulic components must be completely
drained before being stored.
●Components must not be stored until they have cooled down.
●Current-carrying components must be permanently isolated
from the power supply before storage (switch off fuses and
main switches, remove cables) and must be secured against
inadvertent restarting.
●The components must be stored in such a way that persons
are not endangered by them.
The regulations in the respective documentation for other heating
components apply for transport and storage of these products.
All steps in these instructions are described using an
example of a single row solar panel array with double-
sided connection (solar return flow at bottom left, solar
inflow at top right). For double-sided connection with
reverse hydraulic connection (solar return flow at bottom left,
solar inflow at top left), the steps must be carried out in a similar
way.
The gradient of the solar panel array must always be aligned to
the bottom connection. With same-side connection, the solar
panel array (bottom edge) must be aligned exactly horizontal.
CAUTION!
The ROTEX Solaris flat solar panels are imper-
vious to slight mechanical loading. However,
impact, shock and walking on them should be
avoided.
●ROTEX Solaris flat solar panels should be
transported and stored with care in their
original packaging only and this packaging
should not be removed until shortly before
installation.
●ROTEX Solaris flat solar panels should be
stored and transported flat on even and dry
supports.
– Transport with forklift trucks or cranes is
only allowed if on pallets.
– Up to 10 flat solar panels can be stacked
and transported on top of each other.

4 xInstallation
FA ROTEX Solaris DrainBack - 09/2016 17
4.2 System layouts
ROTEX solar systems are usually built according to one of the
following system concepts.
4.2.1 Parallel connection
4.2.2 Series connection
As an alternative to the parallel circuits of the solar panels de-
scribed in these instructions, a maximum of three rows of solar
panels can also be installed above one another if required. Solar
panels or solar panel arrays installed in this way must be con-
nected in series (fig. 4-3).
Fig. 4-1 Two-way connected solar panel array (recommended)
Fig. 4-2 Same-side connected solar panel array
(max. 3 solar panels)
Fig. 4-3 Alternative solar panel arrangement
≥0,5%
≥2%
TK
98
TK
98
12 10 11
5
6
9
8
7
7
7
2b 4
TK
1Solar panel connector
2Mounting rail
2b Solar panel securing clips
4Solar panel
5Solar panel connecting elbow return flow
6Solar panel connecting elbow inflow
7Sealing plug
8Solar return flow pipe
9Solar inflow pipe
10 Solar panel row connector
11 Solar panel array (2x 2 solar panels)
TKSolaris solar panel temperature sensor
Tab. 4-1 Legend for fig. 4-1 to fig. 4-3 and fig. 4-8
The V21P, V26P and H26P flat solar panels can be
installed on roofs with an incline from 15° to 80° (roof-
mounted mounting).
The V21P and V26P flat solar panels can be integrated in the
roof area if it has an incline from 15° to 80° (in-roof mounting).
The V26P and H26P flat solar panels can be installed on flat
roofs with an incline of less than 5° (flat roof mounting).
For detailed information on the alignment of the solar panel
array and on attaching it onto the roof area or for integration in
the roof covering, refer to the quick instructions that accompany
the respective assembly packages.

18 FA ROTEX Solaris DrainBack - 09/2016
4 xInstallation
4.3 Laying the connecting pipe
●Lay and affix prefabricated connection pipes (inflow and
return flow) with integrated sensor cable (see chap. 3)
between the planned installation location and the solar panel
array in the inner roof and the site of the hot water storage
tank with control system and RPS4 pump unit.
– Make sure there is adequate length for connection to the
hot water storage tank and the flat solar panels.
– Ensure a constant gradient of the connecting pipes (min.
2 %).
– The maximum permissible overall pipe length must not be
exceeded (see tab. 4-2).
If the CON 15 or CON 20 connecting lines do not suffice,
ROTEX recommends using the CON X 25, CON X 50,
CON X 100 or CON XV 80 extension pipes.
– The inflow connecting pipe (VA15 Solar) must be con-
nected to the top and the return flow connecting pipe
(VA18 Solar) to the bottom of the solar panel (see fig. 4-1
to fig. 4-3 and fig. 4-8).
Tab. 4-2 Maximum lengths of the ROTEX connecting pipes
Additional notes about connecting pipes
If on-site conditions make it impossible or very difficult to install
the connecting pipes in the manner described above, slight devi-
ations from the specified installation are permitted. Hereby, the
inflow pipe may not be larger than 18 x 1 mm.
●If vertical copper pipes are already installed in the house, they
can be used if a continuous connection pipe gradient can be
guaranteed.
●If a uniform gradient from the second roof penetration to all
pipe sections can not be guaranteed when the solar panels
are connected at opposite ends, then for roof penetration
purposes, the inflow pipe can be connected to the top of (e.g.
through a ventilating tile), if:
– the highest point if the inflow pipe is not more than 12 m
above the storage tank mounting floor level.
– the internal diameter of the inflow pipe is not more than
16 mm.
– a continuous rise of the inflow pipe to the highest point, as
well as a continuous gradient to the warm water storage
cylinder is ensured.
●For pipe runs in which only a limited gradient can be
achieved, copper pipe should be used on site. This avoids the
need for a rigid supporting structure, and prevents the
formation of water pockets due to expansion of the plastic
pipes.
Notes on the roof penetration box of the connecting
pipe
Carry out the following steps:
1. Make the roof penetration points as close as possible under
the panel connecting points. Make sure that effective sealing
of the outer roof area can be ensured. Special roof penetra-
tions for the roof-mounted and the flat roof mounting are avail-
able as system components (see chap. 3.3).
CAUTION!
Siphon action may never be allowed to occur
anywhere in the pipe run between the storage
tank and the flat solar panel. This could lead to
functional faults and even material damage.
In the case of longer pipe runs with only a
minimum gradient, it is also possible for water
pockets with a siphoning effect to develop due
to thermal expansion of the plastic pipes be-
tween the mounting points.
●Always make sure that pipe runs have a
continuous gradient of at least 2 %.
●For longer horizontal pipe runs, ROTEX
generally recommends the use of the vessel
holder set (TS, 16 42 45) or a rigid
supporting construction (e.g. profile rails,
pipe, etc.).
If larger distances need to be covered, calcula-
tions need to be made for the dimensioning of
the connecting pipes.
Contact ROTEX Service.
Number of solar panels Max. possible total length of
pipe
2 45 m
3 30 m
4 17 m
5 15 m
CAUTION!
Leaking vapour barriers can lead to building
damage.
●Reseal the vapour barrier from the inside at
the penetration points of the connecting
pipes and cable.
CAUTION!
If plastic pipes are damaged, there is a risk that
they will break.
●When cutting through the thermal insulation,
never damage the outer surface of the VA
Solaris connecting pipes.

4 xInstallation
FA ROTEX Solaris DrainBack - 09/2016 19
2. Lay the connection pipes up to the roof penetration and fix in
position (e.g. with clamps).
3. Carefully cut open or cut off the thermal roof insulation under
the roof penetration box so the return flow pipe (VA18 Solar)
can be pulled out and laid with sufficient gradient to the roof
penetration box.
4. Run the connecting pipes through the roof at the points pro-
vided. To ensure uninterrupted thermal insulation (also within
the roof structure), the insulation must be resealed at the pen-
etration points (e.g. with adhesive tape).
5. Cut off the thermal insulating hoses of the connecting pipes
so that the pipes can be passed through the individual roof
penetrations.
6. Pull the inflow pipe (top on the flat solar panel/VA15 Solar) as
well as the return flow pipe (bottom on the flat solar
panel/VA18 Solar) through the M32 screw fitting of the re-
spective roof penetration box. Next, push the equipotential
bonding cable and the solar panel temperature sensor cable
through the respective M16 glands from inside.
7. For on-roof mounting:
Cover the roof penetrations.
– The roof tiles at the side and above must overlap the roof
penetration.
– The corrugated flashing must overlap the roof tile under-
neath and be shaped to match the roof tile.
Fig. 4-4 Step 2
The connecting cable for the solar panel temper-
ature sensor is drawn into the heat insulation hose
together with the inflow connecting pipe. At the joint
of the inflow and return flow connecting pipes, it
must be pulled out of the pre-fabricated connecting pipe
CON… and routed along the return flow connecting pipe to
the bottom panel connection.
For flat roof mounting:
In order to keep the pipe laying as short as possible
in the frost-endangered area (outdoors), ROTEX
recommends installing two separate flat roof penetration
boxes for two-way connection of the solar panel array for the
roof penetration box of the inflow and return flow pipes.
With 3 and more solar panels, the two-way solar panel array
must be connected with 2 flat roof penetration boxes. The
CON FE ( 16 47 09) roof penetration box required for
this is equipped with seals for the cable screw fittings. They
must be converted to match the connection type.
T
K
Fig. 4-5 Step 5
Fig. 4-6 Step 6
Fig. 4-7 Step 7

20 FA ROTEX Solaris DrainBack - 09/2016
4 xInstallation
With flat roof mounting:
The flat roof penetration must be professionally sealed in the
roof (e.g. by means of bitumen sheeting). Involve a roofer if
necessary.
Depending on the type of connection, seal off the unused
cable screw fittings in the flat roof penetrations with the
matching seal screw fittings.
8. Tighten the M-screw fittings of the connection pipes and ca-
bles.
4.4 Mounting the flat solar panels
Carry out the following steps:
1. Hook the solar panel securing clips in the guide groove of the
lower mounting profile and tilt downwards.
After they have been hooked on, the solar panel securing
clips can be moved sideways (see fig. 4-8 and tab. 4-3).
Tab. 4-3 Clearance dimensions of the securing clips
2. Lift the flat solar panel onto the roof area using a crane. If no
crane is available, the solar panel can be hoisted onto the roof
with a rope, using a ladder leaning against the roof edge. De-
pending on the installation requirements, unpack the solar
panel before or after the transport to the roof and remove the
collection pipe protective plugs.
CAUTION!
With special roof coverings, such as roof tiles
with very pronounced undulations (large differ-
ences in height), sealing problems can occur
with the universal roof penetration box.
●In such cases, and also with plane tiles or
slate roofing, a professional roofer should be
consulted.
The solar panel mounting and the hydraulic connection
is only carried out after installation of the requisite sub-
construction. All assembly information for the sub-
construction or the roof integration of the ROTEX
Solaris flat plate panels are given in the respective quick instruc-
tions which accompany the
●roof-mounted assembly packages
●in-roof assembly packages
●flat roof assembly packages.
●Fix the upper mounting profile in place in such a way that the
lateral alignment can still be corrected.
Fig. 4-8 Step 1: Alignment of the securing clips
(Legend, see tab. 4-1, Dimensions, see tab. 4-3)
V21P V26P H26P
A0 100 – 250
A1 650 – 850 800 – 1100 1600 – 1800
A2 240 – 440
The flat solar panel must be lifted onto the roof in the
correct orientation for mounting (prevents faults during
connection or difficult manoeuvring operations). The
top side of the solar panel (DB) is marked on the pro-
tective cover of the solar panel glazing. The plugs for the solar
panel temperature sensor and the round solar panel connection
seals must at the bottom when aligning the flat solar panel.
A0A1A1 A2A0
2b
2b
(8)
(9)