Solarbayer wood log boiler set HVS E 25-3C type C (2x SLS-800-S

Solarbayer log boiler HVS 25 E
(Economic) with a nominal heat output
of 25,0 kW. Large filling chamber for
logs up to 50 cm in length, upper wood
gasification with lower burn-off,
optimised combustion chamber geometry
with primary air preheating, boiler
control with digital display for easy
operation, combustion-optimised output
and combustion control without lambda
probe for lowest emissions, easy
cleaning possible from the front,
speed-controlled forced draft fan,
exhaust gas turbulators, accumulator
sensor, (carbonization gas extraction
available as optional accessory)

Technical specifications:
nominal output 25.0 kW
efficiency: 91,4 %
energy efficiency class: A+
energy efficiency index EEI: 116
annual space heating efficiency: 79 %
boiler class DIN EN 303-5+A1: 5
width/height/depth: 645x1155x1070 mm
boiler weight: 440 kg
boiler water capacity: 75 l
max. operating temp.: 95 C
max. operating pressure: 3 bar
filling volume: 116 l
filling opening (W/H): 435 mm x 255 mm
max. log length: 500 mm
burning time, hardwood: approx. 4,2 hrs
flue gas connection: 159 mm
exhaust gas temperature: 171,9 C
necessary feed pressure: -13 ... -15 Pa
flow/return connection: 2" IT
electrical connection: 230V/50Hz/10A
recommended buffer volume: 2000 L

Only suitable for natural,
split logs with a residual
moisture of approx. 16 %

ready-to-assemble compact boiler
charging unit for all popular boiler
sizes up to 50 kW nominal output
electronically controlled
(opening temperature.: 70 Gr.C)

circulation pump:
Wilo PARA 25/6 SC

technical datas:
connection: 1"IG
Max. pressure: 6 bar
Max. temperature: 95 Gr.C
mixer motor with control unit
in insulation box
dimension: 300 x 370 x 235
distance tubular axle: 125 mm

Thermal run-off protection with test
device for overheating protection
of boilers.

length of capillary tube: 1300 mm
min. operating temperature: - 10 C
max. operating temperature: 110 C
temp. reponse point: 97 C +/- 2 C
operating overpressure: 10 Bar
max. performance: 6,5 m3/h

Stratification buffer tank SLS-S 800
with patented thermohydraulic
stratification control system (SLS). The
SLS system in the flow and return line
enable ideal heat stratification during
loading and unloading with instant heat
availability. For higher efficiency with
different heat sources and consumers.
Integrated large heat exchanger for
improved efficiency of the solar thermal
systems. Numerous connections for
sensors, thermometers and an immersion
heater. Fire protection fleece
insulation ISO-B1 made from recycled
fibres (Oeko-Tex® Standard 100) incl.
floor insulation for low heat loss.
Robust PVC jacket with stainless steel
quick-lock system for easy installation.

Technical data:
nominal volume: 796 litres
material: steel S235JR
corrosion protection outside: priming
height with insulation: 1910 mm
height without insulation: 1835 mm
tilted height: 1950 mm
diameter without insulation: 790 mm
diameter with insulation: 990 mm
weight: 139 kg
max. operating pressure: 6 bar
max. operating temperature: 95 °C

Heat exchangers (heating/solar):
surface: 3.5 m²
capacity: 21.5 litres
max. operating pressure: 10 bar
max. operating temperature: 110 °C

Connections:
heating: 4x DN40 (1 1/2")
immersion heater*:1x DN40 (1 1/2")
*max. installation length: 840 mm
air vent: 1x DN40 (1 1/2")
sensor (top): 1x DN15 (1/2")
sensor: 4x DN15 (1/2")
heat exchanger: 2x DN25 (1")
connections aligned in 90 degrees

Thermal insulation:
material: fibre mat
lambda λ: 0.0368 W/(mK)
thickness uncompressed: 100 mm +/- 10%
protective sheath: PVC foil silver
fire protection class according to
DIN 4102 for the complete insulation: B1
Standby energy consumption according to
DIN EN 12897:2020-05: 2.61 kWh/24h
standing heat loss: 109 W
energy efficiency class: C

Solarbayer membrane expansion vessel
for closed heating systems
manufactured according to UNI EN9001, DIN tested,
Certification according to
pressure equipment directive 97/23/EC

operating temperature: -10 C / +100 C
max. operating pressure: 8 bar
pre-pressure: 1,5 bar
connection: 1" external thread (bottom)
with pedestal
diameter: 600 mm
height: 1085 mm

with sealable shut off device,
connection and draining
for expansion vessels according to DIN 4751,
for replacing the expansion vessel
without draining the heating system

Solarbayer membrane expansion vessel
for closed heating systems
manufactured according to UNI EN9001, DIN tested,
Certification according to
pressure equipment directive 97/23/EC

operating temperature: -10 C / +100 C
max. operating pressure: 8 bar
pre-pressure: 1,5 bar
connection: 3/4" external thread (on top)
with pedestal
diameter: 365 mm
height: 564 mm

with lead sealable shutoff device,
connection and draining
for expansion vessels according to DIN 4751,
for exchanging the expansion vessel with
draining the heating system

Absorption air separator
Absorption air separator for closed hot
and cold water systems up to a
maximum temperature of 120 °C
and an overpressure of 10 bar
variable mounting is possible
horizontal and vertical

dimension incl. insulation:
mounting length 106mm
height incl. insulation 233mm
depht incl. insulation 189mm

material: brass and high grade plastics
installation length 106mm
high 240mm
installation: vertical / horizontal (rotatable)
incl. magnetic element
min./max. temperature.: -10 °C / 120 °C.
max. pressure 10 bar
unique flow velocities up to 3 m/s.
20mm EPP insulation 0,036 W/mK

The boiler safety unit KS25
for boiler sizes up to 50 kW
is used for displaying
the pressure, de-airing and for the
safeguarding of closed hot water systems

connection: DN 25 (1" internal thread)
manometer display range: 0-4 bar
automatic air vent
safety valve: 3 bar
incl. insulation box