STIEBEL ELTRON STD 315-1 Plus Specification sheet

OPERATION AND INSTALLATION
UTILISATION ET INSTALLATION
BEDIENING EN INSTALLATIE
USO E INSTALLAZIONE
OBSLUHA A INSTALACE
OBSLUHA AINŠTALÁCIA
OBSŁUGA I INSTALACJA
KEZELÉS ÉS TELEPÍTÉS
Floor mounted DHW cylinder for heat pumps|Ballon d’eau chaude sanitaire sur socle
pour pompes à chaleur| Staande warmwaterboiler voor warmtepompen | Accumulatore
verticale acqua calda sanitaria per pompe di calore | Stacionární zásobník teplé vody
pro tepelná čerpadla | Stojatý zásobník teplej vody pre tepelné čerpadlá | Stojący
zasobnik CWU do pomp ciepła | Álló melegvíztartály hőszivattyúkhoz
» STD 315-1 Plus
» STD 420-1 Plus
» STD 520-1 Plus

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TABLE OF CONTENTS | OPERATION
General information
OPERATION
1. General information
The chapters "Special information" and "Operation" are intended
for both users and qualified contractors.
The chapter "Installation" is intended for qualified contractors.
Note Read these instructions carefully before using the appli-
ance and retain them for future reference.
Pass on these instructions to a new user if required.
1.1 Safety instructions
1.1.1 Structure of safety instructions
KEYWORD Type of risk Here, possible consequences are listed that may result
from failure to observe the safety instructions.
f Steps to prevent the risk are listed.
1.1.2 Symbols, type of risk
Symbol Type of risk
Injury
Electrocution
Burns
(burns, scalding)
1.1.3 Keywords
KEYWORD Meaning
DANGER Failure to observe this information will result in serious
injury or death.
WARNING Failure to observe this information may result in serious
injury or death.
CAUTION Failure to observe this information may result in non-seri-
ous or minor injury.
OPERATION
1. General information �����������������������������������������2
1.1 Safety instructions����������������������������������������������� 2
1.2 Other symbols in this documentation ����������������������� 3
1.3 Units of measurement ������������������������������������������ 3
2. Safety����������������������������������������������������������3
2.1 Intended use������������������������������������������������������ 3
2.2 General safety instructions ������������������������������������ 3
2.3 Test symbols ������������������������������������������������������ 3
3. Appliance description ���������������������������������������3
4. Cleaning, care and maintenance ���������������������������4
4.1 Scaling ������������������������������������������������������������� 4
5. Troubleshooting ����������������������������������������������4
INSTALLATION
6. Safety����������������������������������������������������������4
6.1 General safety instructions ������������������������������������ 4
6.2 Instructions, standards and regulations �������������������� 4
7. Appliance description ���������������������������������������4
7.1 Standard delivery������������������������������������������������ 4
7.2 Required accessories ������������������������������������������� 4
7.3 Additional accessories ������������������������������������������ 4
8. Preparation ���������������������������������������������������5
8.1 Installation site��������������������������������������������������� 5
8.2 Transport and handling ���������������������������������������� 5
9. Installation����������������������������������������������������7
9.1 Heat exchanger connection������������������������������������ 7
9.2 Water connection and safety assembly ��������������������� 7
9.3 Temperature sensors�������������������������������������������� 8
10. Commissioning �����������������������������������������������8
10.1 Initial start-up���������������������������������������������������� 8
10.2 Recommissioning������������������������������������������������ 8
11. Appliance shutdown �����������������������������������������8
12. Troubleshooting ����������������������������������������������8
13. Maintenance ��������������������������������������������������8
13.1 Checking the safety valve �������������������������������������� 8
13.2 Checking/replacing the protective anode������������������� 8
13.3 Draining the appliance ����������������������������������������� 8
13.4 Cleaning and descaling the appliance����������������������� 8
14. Specification ��������������������������������������������������9
14.1 Dimensions and connections���������������������������������� 9
14.2 Energy consumption data������������������������������������� 12
14.3 Data table �������������������������������������������������������� 12
GUARANTEE
ENVIRONMENT AND RECYCLING

OPERATION
Safety
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ENGLISH
1.2 Other symbols in this documentation
Note General information is identified by the adjacent symbol.
f Read these texts carefully.
Symbol Meaning
Material losses
(appliance damage, consequential losses and environmen-
tal pollution)
Appliance disposal
f This symbol indicates that you have to do something. The ac-
tion you need to take is described step by step.
1.3 Units of measurement
Note All measurements are given in mm unless stated oth-
erwise.
2. Safety
2.1 Intended use
The appliance is intended for domestic use. It can be used safely
by untrained persons. The appliance can also be used in non-do-
mestic environments, e.g. in small businesses, as long as it is
used in the same way.
This appliance is designed to heat DHW with heat pumps.
Any other use beyond that described shall be deemed inappro-
priate. Observation of these instructions and of the instructions
for any accessories used is also part of the correct use of this
appliance.
2.2 General safety instructions
WARNING Burns There is a risk of scalding at outlet temperatures in ex-
cess of 43°C.
!WARNING Injury
The appliance may be used by children aged8 and up and
persons with reduced physical, sensory or mental capa-
bilities or a lack of experience and expertise, provided
that they are supervised or they have been instructed
on how to use the appliance safely and have understood
the potential risks. Children must never play with the
appliance. Cleaning and user maintenance must not be
carried out by children without supervision.
!Material losses
The appliance is pressurised.
During the heat-up process, expansion water will drip
from the safety valve. If water continues to drip when
heating is completed, please inform your qualified con-
tractor.
2.3 Test symbols
See type plate on the appliance.
3. Appliance description
The DHW is heated via a smooth tube internal indirect coil. In
addition, a threaded immersion heater can be connected. You can
use the appliance to supply one or more draw-off points.
The appliance is equipped with an inspection flange and ther-
mometer.
The steel cylinder is coated on the inside with special directly
applied "anticor®" enamel and equipped with a protective anode.
This anode protects the inside of the cylinder from corrosion. The
cylinder is encased by foam insulation and a plastic jacket.

INSTALLATION
Cleaning, care and maintenance
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4. Cleaning, care and maintenance
- Have the function of the safety assembly and electrical safe-
ty of the fitted accessories regularly checked by a qualified
contractor.
- We recommend having the protective anode initially checked
by a qualified contractor after 2years. The qualified contrac-
tor will then determine the intervals at which repeat checks
should be performed.
- Never use abrasive or corrosive cleaning agents. A damp
cloth is sufficient for cleaning the appliance.
4.1 Scaling
Almost every type of water will deposit limescale at high tem-
peratures. This settles inside the appliance and affects both per-
formance and service life. If a threaded immersion heater is in-
stalled, the heating elements must be descaled from time to time.
A qualified contractor who knows the local water quality will tell
you when the next service is due.
f Check the taps regularly. Limescale deposits at the tap out-
lets can be removed using commercially available descaling
agents.
5. Troubleshooting
Problem Cause Remedy
The flow rate is low. The aerator in the tap
or the shower head is
scaled up or dirty.
Clean and/or descale the
aerator or shower head.
If you cannot remedy the fault, contact your qualified contractor.
To facilitate and speed up your enquiry, please provide the serial
number from the type plate (000000-0000-000000).
000000-0000-000000
D0000089404
INSTALLATION
6. Safety
Only a qualified contractor should carry out installation, commis-
sioning, maintenance and repair of the appliance.
6.1 General safety instructions
We guarantee trouble-free function and operational reliability only
if original accessories and spare parts intended for the appliance
are used.
6.2 Instructions, standards and regulations
Note Observe all applicable national and regional regulations
and instructions.
7. Appliance description
7.1 Standard delivery
The following are delivered with the appliance:
- Cap and gasket for the DHW circulation connection
- Thermometer
(inserted in the DHW outlet on delivery)
- 2lifting straps
- 2washers
- 3adjustable feet
7.2 Required accessories
Depending on the static pressure, safety assemblies and pressure
reducing valves are available. These type-tested safety assemblies
protect the appliance against unacceptable excess pressure.
7.3 Additional accessories
Threaded immersion heaters are available as accessories.
If it is not possible to insert a rod anode from above, install a
segmented anode.

INSTALLATION
Preparation
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ENGLISH
8. Preparation
8.1 Installation site
f Always install the appliance in a room free from the risk of
frost and near the draw-off point.
f Ensure the floor is level.
f Ensure the floor has a sufficient load bearing capacity (see
chapter "Specification/ Data table").
f Observe the room height and height when tilted (see chapter
"Specification/ Data table").
Minimum clearances
The minimum side clearances can be swapped between left and
right.
≥300
≥300
≥800
≥500
≥100
≥100
≥500
D0000089410
f Maintain the minimum clearances.
8.2 Transport and handling
!Material losses
We recommend leaving the transport packaging in place
on the cylinder for transportation to the installation site,
to prevent the cylinder casing from becoming dirty or
damaged.
In particular, the edge protection on the underside of the
appliance should only be removed after the appliance has
been sited and aligned.
!Material losses
The hydraulic connections and installation components
can be damaged when the appliance is set down or car-
ried.
f Ensure that the flange is facing upwards.
For transportation, the appliance is secured to the pallet with
3screws.
f Undo the screws from the pallet.
f Tilt the appliance from the pallet onto a suitable support.
8.2.1 Carrying aids
To facilitate handling during transportation, you can fit carrying
aids to the top and bottom of the appliance.
Underside of the appliance
!Material losses
Always use the supplied lifting straps in combination with
the supplied washers.
Note The carrying straps are intended for one-time use to ma-
noeuvre the appliance.
D0000091503
STD 315-1 Plus
3
1
2
1 Washer
2 Adjustable foot
3 Lifting strap

INSTALLATION
Preparation
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D0000091504
STD 420-1 Plus
STD 520-1 Plus
3
1
2
1 Washer
2 Adjustable foot
3 Lifting strap
f Connect 2of the supplied adjustable feet with the supplied
washers and lifting straps, as shown.
f Wind in the two adjustable feet with lifting straps as far as
possible.
f Wind in the adjustable foot without a lifting strap to a similar
depth as the two adjustable feet with lifting straps.
Note The lifting straps can remain on the appliance once it
has been sited.
Top of the appliance
D0000091505
f Wind a suitable fitting into the DHWoutlet.
f Insert a sufficiently strong pipe or an appropriate rod
through the fitting. Take into account the door widths and
any narrow areas on the way to the installation site.
8.2.2 Siting
D0000089405
f Use the adjustable feet to compensate for any unevenness in
the floor.

INSTALLATION
Installation
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ENGLISH
9. Installation
9.1 Heat exchanger connection
f Flush the indirect coil with water before connection.
9.1.1 Oxygen diffusion
!Material losses
Avoid open vented heating systems and underfloor
heating systems with plastic pipes that are permeable
to oxygen.
In underfloor heating systems with plastic pipes that are per-
meable to oxygen and in open vented heating systems, oxygen
diffusion may lead to corrosion on the steel components of the
heating system (e.g. on the indirect coil of the DHW cylinder, on
buffer cylinders, steel radiators or steel pipes).
!Material losses
The products of corrosion (e.g. rusty sludge) can set-
tle in the heating system components, which may re-
sult in a lower output or fault shutdowns due to reduced
cross-sections.
9.2 Water connection and safety assembly
9.2.1 Safety instructions
Note Carry out all water connection and installation work in
accordance with regulations.
Note Connect the hydraulic connections using flat gaskets only.
P
T
F
E
D0000091712
Cold water line
Steel, copper or plastic are approved materials for pipework.
!Material losses
A safety valve is required.
DHW line
Copper or plastic are approved materials for pipework.
!Material losses
For the combined use of a threaded immersion heater
and plastic pipework systems, observe the maximum
permissible temperature and the maximum permissible
pressure specified in chapter "Specification/ Data table".
!Material losses
Operate the appliance only with pressure-tested taps.
Note If not used, close off the DHW circulation connection (see
chapter "Specification/ Dimensions and connections")
with the supplied cap and gasket.
9.2.2 Connection
f Flush the pipework thoroughly.
f Observe the information in the installation instructions of the
safety assembly.
f Connect the DHW outlet and the cold water inlet lines with
the safety assembly. Please note that, depending on the stat-
ic pressure, you may also need a pressure reducing valve.
f Size the drain so that water can drain off unimpeded when
the safety valve is fully opened. The safety valve discharge
aperture must remain open to the atmosphere.
f Fit the discharge pipe of the safety assembly with a constant
fall.

INSTALLATION
Commissioning
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9.3 Temperature sensors
Note The temperature sensor is part of the standard delivery
of the heat pump control unit.
D0000046061
f Bend the springs of the DHW sensor.
f Insert the DHW sensor as far as it will go into the sensor
well for the heat pump flow sensor (recommended energy
saving position) or heat pump return sensor (high DHW
convenience).
f Mount the sensors according to the installation instructions
for the heat pump control unit (for sensor wells, see chapter
"Specification/ Dimensions and connections").
f Route the connecting cable/lead to the heat pump control
unit.
10. Commissioning
10.1 Initial start-up
f Open a downstream draw-off point until the appliance is full
and the pipes are free of air.
f Vent the internal indirect coil.
f Fit and check accessories as required.
f Check the safety valve for correct function.
f Check that the DHW temperature displayed on the heat pump
control unit is correct.
10.1.1 Appliance handover
f Explain the appliance function to users and familiarise them
with how it works.
f Make the user aware of potential dangers, especially the risk
of scalding.
f Hand over these instructions.
10.2 Recommissioning
See chapter "Initial start-up".
11. Appliance shutdown
f Disconnect any accessories installed from the mains at the
MCB/fuse in the fuse box/distribution board.
f Drain the appliance. See chapter "Maintenance/ Draining the
appliance".
12. Troubleshooting
Fault Cause Remedy
The safety valve drips when heat-
ing is switched off.
The valve seat is
contaminated.
Clean the valve seat.
13. Maintenance
WARNING Electrocution Carry out all electrical connection and installation work
in accordance with relevant regulations.
If you need to drain the appliance, observe chapter "Draining the
appliance".
13.1 Checking the safety valve
f Regularly vent the safety valve on the safety assembly until a
full water jet is discharged.
13.2 Checking/replacing the protective anode
f We recommend having the protective anode initially checked
and replaced if necessary after 2years. For this, observe the
maximum transition resistance of 0.3Ω between the protec-
tive anode and the cylinder.
f Next, decide the time intervals at which further checks
should be carried out.
13.3 Draining the appliance
WARNING Burns Hot water may escape during draining.
f Close the shut-off valve in the cold water supply line.
f Open the hot water taps on all draw-off points.
f Drain the appliance via the drain valve.
13.4 Cleaning and descaling the appliance
For the torque of the flange screws, see chapter "Specification/
Dimensions and connections".
f Never use descaling pumps.
f Do not treat the enamelled interior of the cylinder or the pro-
tective anode with descaling agents.

INSTALLATION

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ENGLISH
14. Specification
14.1 Dimensions and connections
STD 315-1 Plus
1619
273
971
700
101
223
438
658
871
971
650
10-20
c01
d01
d02
i18
c06
h06
c10
h05
i07
h43
i01
D0000089400
STD 315-1 Plus
c01 Cold water inlet Male thread G 1
c06 DHW outlet Male thread G 1
c10 DHW circulation Male thread G 1/2
d01 Heat pump flow Female thread G 1 1/2
d02 Heat pump return Female thread G 1 1/2
h05 Sensor heat pump DHW Diameter mm 9.5
h06 Sensor heat pump DHW optional Diameter mm 9.5
h43 Thermometer
i01 Flange Diameter mm 140
Pitch circle diameter mm 120
Screws M 10
i07 elec. emergency/booster heater Female thread G 1 1/2
i18 Protective anode Female thread G 1 1/4

INSTALLATION

10 | STD 315-1 Plus, STD 420-1 Plus, STD 520-1 Plus www.stiebel-eltron.com
STD 420-1 Plus
1799
283
1171
730
780
10-20
101
233
483
738
1071
1171
c01
d01
d02
i18
c06
h06
c10
h05
i07
h43
i01
D0000089401
STD 420-1 Plus
c01 Cold water inlet Male thread G 1
c03 Cold water inlet pipe
c06 DHW outlet Male thread G 1
c10 DHW circulation Male thread G 1/2
d01 Heat pump flow Female thread G 1 1/2
d02 Heat pump return Female thread G 1 1/2
h05 Sensor heat pump DHW Diameter mm 9.5
h06 Sensor heat pump DHW optional Diameter mm 9.5
h43 Thermometer
i01 Flange Diameter mm 140
Pitch circle diameter mm 120
Screws M 10
i07 elec. emergency/booster heater Female thread G 1 1/2
i18 Protective anode Female thread G 1 1/4