Baxi SH 7 COMPACT Manual

Spain Portugal
en
Installation and Service Manual
Pressurised domestic installations
Solar hydraulic unit
SH 7 COMPACT
SH 7 COMPACT TOP
SH 7
SH 14
SH 7 SIMPLE

Dear Customer,
Thank you very much for buying this appliance.
Please read through the manual carefully before using the product, and keep it in a safe place for later reference. In order to
ensure continued safe and efficient operation we recommend that the product is serviced regularly. Our service and customer
service organisation can assist with this.
We hope you enjoy years of problem-free operation with the product.

1 Safety
1.1 General safety instructions
1.1.1 General safety
Peligro
This appliance can be used by children aged 8 years and above
and persons with reduced physical, sensory or mental capabilities
or lack of experience and knowledge if they are given correct
supervision or instruction on using the appliance in complete
safety and understand the hazards involved. Children must not
play with the appliance. Cleaning and user maintenance must not
be carried out by children without supervision.
Peligro de electrocución
Before any work, switch off the power supply to the appliance.
Atención
Use only genuine spare parts.
Importante
Only qualified professionals are permitted to install the appliance,
in accordance with prevailing local and national regulations.
Advertencia
Do not touch the pipes. Depending on the settings, the
temperature of the pipes may exceed 60 °C.
Advertencia
Take precautions with the domestic hot water. Depending on the
settings, the temperature of the domestic hot water may exceed
60 °C.
Advertencia
Only qualified professionals are authorised to work on the
appliance and system installation.
Advertencia
Use protective gloves.
Importante
The installation must comply on all points with prevailing
regulations and Directives, which govern work and interventions in
individual homes, blocks of flats and other buildings.
1.1.2 Electrical safety
Advertencia
If a power supply cable comes with the appliance and it turns out
to be damaged, it must be replaced by the manufacturer, its after
sales service or persons with similar qualifications in order to
obviate any danger.
Importante
The installation must comply on all points with prevailing
regulations and Directives, which govern work and interventions in
individual homes, blocks of flats and other buildings.
1 Safety
7729335 - 04 - 12052021 Solar hydraulic unit 3

Advertencia
Do not neglect to service the appliance. Contact a qualified
professional or take out a maintenance contract for the annual
maintenance of the appliance.
1.2 Recommendations
Advertencia
The installation must comply with all the provisions of the
regulations (DTU, EN, etc.) governing work and interventions in
individual homes, blocks of flats or other buildings.
Importante
Keep the appliance accessible at all times.
Importante
Regularly check that the system is operating correctly.
Importante
Never remove or cover the labels and data plates affixed to
appliances. The labels and data plates must be legible throughout
the entire service life of the appliance.
Damaged or illegible instructions and warning stickers must be
replaced immediately.
Importante
Only remove the casing to perform maintenance and repair work.
Put the casing back in place after maintenance and repair work.
1.3 Liabilities
1.3.1 Manufacturer's liability
Our products are manufactured in compliance with the requirements of the
various Directives applicable. They are therefore delivered with the
marking and any documents necessary. In the interests of the quality of
our products, we strive constantly to improve them. We therefore reserve
the right to modify the specifications given in this document.
Our liability as manufacturer may not be invoked in the following cases:
Failure to abide by the instructions on installing and maintaining the
appliance.
Failure to abide by the instructions on using the appliance.
Faulty or insufficient maintenance of the appliance.
1.3.2 Installer's liability
The installer is responsible for the installation and initial commissioning of
the appliance. The installer must observe the following instructions:
Read and follow the instructions given in the manuals provided with the
appliance.
Install the appliance in compliance with prevailing legislation and
standards.
Carry out initial commissioning and any checks necessary.
Explain the installation to the user.
If maintenance is necessary, warn the user of the obligation to check the
appliance and keep it in good working order.
Give all the instruction manuals to the user.
1 Safety
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1.3.3 User's liability
To guarantee optimum operation of the system, you must abide by the
following instructions:
Read and follow the instructions given in the manuals provided with the
appliance.
Call on a qualified professional to carry out installation and initial
commissioning.
Get your installer to explain your installation to you.
Have the required inspections and maintenance carried out by a
qualified installer.
Keep the instruction manuals in good condition close to the appliance.
1 Safety
7729335 - 04 - 12052021 Solar hydraulic unit 5

2 About this manual
2.1 General
This manual is intended for installers of pressurised hydraulic units.
2.2 Symbols used
2.2.1 Symbols used in the manual
This manual uses various danger levels to draw attention to special
instructions. We do this to improve user safety, to prevent problems and to
guarantee correct operation of the appliance.
Peligro
Risk of dangerous situations that may result in serious personal
injury.
Peligro de electrocución
Risk of electric shock.
Advertencia
Risk of dangerous situations that may result in minor personal
injury.
Atención
Risk of material damage.
Importante
Please note: important information.
Consejo
Reference to other manuals or pages in this manual.
2 About this manual
6 Solar hydraulic unit 7729335 - 04 - 12052021

3 Technical specifications
3.1 Directives
The pump and solar control supplied with this product comply with the CE
marking.
For all provisions and Directives referred to in these instructions, it is
agreed that all addenda or subsequent provisions will apply at the time of
installation.
3.2 Technical data
Tab.1 Technical data of the hydraulic units
SH 7 COM
PACT
SH 7 COM
PACT TOP
SH 7 SH 14 SH 7 SIMPLE
Maximum field of collectors m214 14 14 28 14
Nominal flow rate l/
h·m2
30 30 30 30 30
Supply voltage V 1~230/50 Hz 1~230/50 Hz 1~230/50 Hz 1~230/50 Hz 1~230/50 Hz
Electrical power consumption W 46 46 45 60 45
Maximum current A 16 3 16 16 16
Protection rating IP 20 20 20 20 20
3.3 Dimensions and connections
3.3.1 SH 7 Compact / SH 7 Compact Top
Tab.2 Connections SH 7 Compact / SH 7 Compact Top
Connection Size
1 Flow pipe to solar installation (lower connection of
solar panels)
Dia. 22
2 Safety valve outlet G3/4" H
3 Filling the system G3/4" M
4 Draining the system G3/4" M
5 Tank outlet Dia. 22
6 Tank inlet Dia. 22
7 System return (upper connection of solar panels) Dia. 22
Fig.1 Dimensions and connections SH 7
Compact / SH 7 Compact Top
200 105
17
2
5
6
3
4
400
BA-0000021-01
3 Technical specifications
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3.3.2 SH 7, SH 14
Tab.3 Connections SH 7 and SH 14
Connection Size
1 Flow pipe to solar installation (lower connection of
solar panels)
Dia. 22
2 Safety valve outlet G3/4" H
3 Filling the system G3/4" M
4 Draining the system G3/4" M
5 Tank outlet Dia. 22
6 Tank inlet Dia. 22
7 System return (upper connection of solar panels) Dia. 22
3.3.3 SH 7 Simple
Tab.4 Connections SH 7 Simple
Connection Size
1 Flow pipe to solar installation (lower connection of
solar panels)
Dia. 22
2 Safety valve outlet G3/4" H
3 Filling the system G3/4" M
4 Draining the system G3/4" M
5 Tank outlet Dia. 22
Fig.2 Dimensions and connections SH 7
and SH 14
200 105
2
3
4
400
17
5
6
BA-0000022-01
Fig.3 Dimensions and connections SH 7
Simple
200 105
2
3
4
400
1
5
BA-0000023-01
3 Technical specifications
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3.4 Electrical diagram
Fig.4 Electrical diagram of the SH 7 Compact unit
N
R1-N R2-N R2-LR1-L
21
T1 A
100 ... 240 V~
50-60 Hz
S1 S2 S3
PWM
L
IP 20
15
16
141312
11
4 53
R1 16(3) A 240 V~
R2 1(1) A 240 V~
Te mp . Sensor
Pt1000
RC TT
DeltaSol®TT
76 9 108
1 2
S1
3 4
S2
4 5 9 10 11 13 14 FCIAMP16 L N
S3
S1
BLUE
BROWN
1200
(51ºC) BLUE
BROWN
BROWN
S2
BA-0000020-01
3 Technical specifications
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Fig.5 Electrical diagram of the SH 7 Compact Top unit
BA-0000068-02
AMP
BLUE
BLUE
BLUE
BROWN
BROWN
BROWN LN
1 2 3 4 5 6 7 8 9
10 11
2
R3 R2 R1 L
N N N N
FCI
1
1
6R1 N
Importante
These electrical diagrams only refer to the SH 7 Compact & SH 7
Compact Top systems
Importante
The SH 7, SH 14 and SH 7 Simple systems require an external
solar control to be connected.
Importante
Observe the line-neutral polarity
3 Technical specifications
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3.5 Characteristic curve
Fig.6 Characteristic curve of the hydraulic unit
BA-0000055-02
V [l/h]
·
SH 7 COMPACT TOP
SH 7 COMPACT
SH 7
SH 7 SIMPLE
SH 14
0 200 400 600 800 1000 1200 1400
0
20
40
60
80
100
120
140
160
Δp [kPa]
3 Technical specifications
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4 Description of the product
4.1 General description
The SH 7 Compact Top SH 7 Compact, SH 7, SH 14 and SH 7 Simple
hydraulic units are a small and compact solution containing all elements
required to easily, quickly and conveniently install solar thermal energy
systems.
The solar hydraulic unit is designed to connect the accumulator and the
collector field.
4.2 Operating principle
The solar pump station transports the hot heat transfer fluid from the
collector field to the domestic hot water tank or the buffer tank. The solar
control controls the solar pump station.
Importante
An external solar control is required to control the solar pump
station for the SH 7, SH 14 and SH 7 Simple units.
4.3 Main components
4.3.1 SH 7 Compact/SH 7 Compact Top
The SH 7 Compact / SH 7 Compact Top system comprises the following
main components:
1Return valve
2Safety group
3Solar circuit pump
4Outlet valve
5Solar control box
6Flow regulator
7Air separator
Fig.7 Main components of the SH 7
Compact / SH 7 Compact Top unit
2
1
3
6
5
4
7
BA-0000024-01
4 Description of the product
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4.3.2 SH 7, SH 14
The SH 7 and SH 14 systems comprise the following main components:
1Return valve
2Safety unit
3Solar circuit pump
4Outlet valve
5Flow regulator
6Air separator
4.3.3 SH 7 Simple
The SH 7 Simple system comprises the following main components:
1Safety unit
2Solar circuit pump
3Outlet valve
4Flow regulator
Fig.8 Main components of the SH 7 and
SH 14 units
2
1
3
65
4
BA-0000025-01
Fig.9 Main components of the SH 7
Simple unit
1
2
4
3
BA-0000026-01
4 Description of the product
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4.4 Standard delivery
Each solar hydraulic unit package contains:
1Hydraulic unit
2Safety unit and assembly accessories
3Documentation pack
Importante
The final product may differ from the image.
Fig.10 Standard delivery
1
2
3
BA-0000027-01
4 Description of the product
14 Solar hydraulic unit 7729335 - 04 - 12052021

5 Before installation
5.1 Installation regulations
Advertencia
The system must be installed by a qualified professional in
accordance with prevailing local and national regulations.
5.2 Electrical requirements
Tab.5 Electrical information
Values
Supply voltage 1~230 V/50 Hz
Power supply Single phase
5.3 Choice of the location
5.3.1 Location dimensions
Decide on the ideal position for the installation, taking into account the
legal provisions and the spatial requirements for the appliance. Allow
sufficient space around the system to ensure adequate access to the
appliance and enable any and all maintenance operations to be carried
out.
The dimensions shown in the figure should be used as a guideline.
5.3.2 Accumulator location
Atención
Install the appliance in a frost-free location.
1. Position the appliance as close as possible to the draw-off points in
order to minimise energy losses through the pipes.
2. Place the accumulator on a base frame to facilitate cleaning of the
area.
3. Install the accumulator on a solid, stable structure able to bear its
weight.
Fig.11 Recommended clearances
350
200
200
MW-5000828-1
5 Before installation
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5.3.3 Installation examples
Standard solar power system with an accumulator for all models of control
panel.
The solar control compares the temperature difference between the
collector sensor S1 and the accumulator sensor S2. If the temperature
difference is greater than or equal to the activation value set on the
control for the pump R1, the pump starts up and charges the
accumulator until it reaches either the value for the shutdown difference
or the set maximum accumulator temperature.
Standard solar power system with an accumulator and auxiliary heater for
all models of control panel.
The solar control compares the temperature difference between the
collector sensor S1 and the accumulator sensor S2. If the temperature
difference is greater than or equal to the activation value set on the
control for the pump R1, the pump starts up and charges the
accumulator until it reaches either the value for the shutdown difference
or the set maximum accumulator temperature. Once the temperature for
S3 reaches the configured value or falls below it, the 3-way valve R2
changes to the direction of the boiler until the offset temperature has
been reached.
Fig.12 System 1
R1
S2
S1
BA-0000065-01
Fig.13 System 2
R1
S2
R2 S3
S1
BA-0000066-01
5 Before installation
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Standard solar energy system with an accumulator and auxiliary electric
heating for the SH 7 Compact model.
The solar control compares the temperature difference between the
collector sensor S1 and the accumulator sensor S2. If the temperature
difference is greater than or equal to the preset activation value for the
pump R1, the pump starts up and charges the accumulator until it
reaches either the value for the shutdown difference or the set maximum
accumulator temperature. Once the temperature for S3 reaches the
configured value or falls below it, the electrical resistance heating starts
up and remains active until the set offset temperature has been
reached.
Fig.15 System 4
BA-0000089-01
R1
R3
S2
S3
S4
S1
S5
T
R4
Standard solar power system with heating circuit for the SH 7 Compact
Top model.
The solar system heats a hot water cylinder which serves as a buffer
tank. This buffer tank is used to heat the domestic hot water and
simultaneously transfer heat to the heating circuit return. The assigned
relay is connected when the difference in temperature between the
buffer tank and the return is greater than the connection temperature
difference.
Fig.14 System 3
R1
R2
S2
S3
S1
BA-0000067-01
5 Before installation
7729335 - 04 - 12052021 Solar hydraulic unit 17

Standard solar power system with pool and heating circuit for SH 7
Compact Top model.
The solar system is used to provide DHW and heating as a priority and,
once this demand has been met, any surplus heat is used to heat the
pool. The solar system heats a hot water cylinder which serves as a
buffer tank. This buffer tank is used to heat the domestic hot water and
simultaneously transfer heat to the heating circuit return. The assigned
relay is connected when the difference in temperature between the
buffer tank and the return is greater than the connection temperature
difference. Also, when the buffer tank reaches the setpoint temperature,
if the collectors sensor S1 is greater than the pool sensor S4, the
second primary pump is activated, thereby using the surplus solar power
to heat the pool.
5.3.4 Pipe diameter calculation
To size the piping, it is recommended that the linear pressure drop of the
pipes does not exceed 40 mmH2O/m and the maximum speed does not
exceed 2 m/s (the design flow rate taken into account is between 30 l/h·m2
and 60 l/h·m2)
Tab.6 Pipe diameter with a 30% glycol concentration at 40 °C
Number of collec
tors
Solar capture sur
face area (m2)
Maximum flow rate
(l/h) (50 l/h·m2)
Recommended diameter
Nominal diameter V (m/s) ΔP (mmH2O/m)
1 2 100 Dia. 10x1.0 0.55 88.5
2 4 200 Dia. 15x1.0 0.42 29.3
4 8 400 Dia. 18x1.0 0.55 36.0
6 12 600 Dia. 22x1.0 0.53 25.2
8 16 800 Dia. 22x1.0 0.71 41.4
10 20 1000 Dia. 28x1.5 0.57 21.2
12 24 1200 Dia. 28x1.5 0.68 29.1
14 28 1400 Dia. 28x1.5 0.79 38.0
5.3.5 Quantity of antifreeze
BAXI heat transfer fluid can be used to fill the installation, in the correct
concentration for the minimum foreseeable outdoor temperature in the
location. It is recommended that you use a mixture of water and glycol in
the following proportions:
Tab.7 Concentration of heat transfer fluid
Volume of heat transfer fluid 26% 33% 37%
Minimum outdoor temperature -10 °C -15 °C -20 °C
Importante
Under no circumstances should the mixture of water and glycol
exceed 40%.
Fig.16 System 5
BA-0000088-01
R1
R3
S2
S3
S4
S1
5 Before installation
18 Solar hydraulic unit 7729335 - 04 - 12052021

Atención
The concentration of heat transfer fluid in the installation must
never fall below 20%.
Advertencia
Although it is non-toxic, odourless and biodegradable, it is
appropriate to take precautions when handling the product. It is
recommended that you use gloves which are resistant to chemical
products and wear suitable eye protection when handling the
product.
Advertencia
If the fluid comes into contact with your skin, wash it with soap and
water. If it comes into contact with your eyes, wash them
immediately with plenty of clean running water.
5 Before installation
7729335 - 04 - 12052021 Solar hydraulic unit 19

6 Installation
6.1 General
The following observations must be taken into account for the hydraulic
unit installation:
Once all the hydraulic connections have been completed, check the
sealing of the entire circuit.
It is helpful to protect the collectors from the potential effects of solar
radiation once the packaging has been removed, until the installation
has been filled.
If there is no demand, or it is anticipated that there will be long periods
without any DHW being extracted, it is recommended to protect the
system using thermal blankets.
Once all the connections on the solar control box sensors have been
completed, it is important to check that these do not run across other
electrical cables as this could generate interference and alter the
readout values.
It is recommended to use a shielded cable for the sensor connections.
Before installing the solar unit, the entire installation needs to be cleaned.
The solar unit must always be installed at a lower level than the collectors
so that no vapour can enter the expansion vessel in case of a blockage.
If the expansion vessel is installed at the same or a higher level than the
solar unit, a heat insulation circuit is required.
The installation must be rinsed with fresh water after each draining
process.
The solar unit is not suitable for direct contact with pool water or solvents.
Atención
Do not use any lubricant or grease on the installation, as this can
damage the seals. Any particles of dirt, grease or lubricant residue
must be rinsed out of the installation prior to installing the solar
unit.
Do not use any solvents to clean the system, as this can damage
plastic parts such as the pump impellers.
6.2 Hydraulic diagram
1. Return from the solar installation
2. Flow pipe to the solar installation
3. Pressure gauge
4. Thermometer
5. Solar pump
6. Flow regulator
7. Safety valve
8. Filling valve
9. Draining branch pipe
10. Expansion vessel
Fig.17 Hydraulic diagram
1
44
3
2
7
8
9
10
5
6
BA-0000029-01
6 Installation
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