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