REMKO VRS 25 E User manual

Edition GB – N01
REMKO VRS
Universal Heaters
Operation · Technology · Spare Parts

3
Contents
These operating instructions must be read thoroughly
before commissioning/using the units!
These instructions are part of the unit and must always be kept near
to the site of installation or on the unit.
Subject to changes, errors and typographical errors excepted!
Safety information 4
Unit description 4
Safety devices 6
Installation instructions 7
Chimney duct 10
Installation and assembly 12
Commissioning 14
Switching off 15
Care and maintenance 16
Troubleshooting 18
Maintenance log 20
Intended use 21
Customer service and warranty 21
Environmental protection and recycling 21
Wiring diagram 230V 22
Wiring diagram 400V direct starting 23
Wiring diagram 400V Y/Δstarting 24
Wiring diagram 400 V fan motor 25
Exploded drawing 26
Spare parts list 27
Appliance specifications 28
Unit dimensions 30
Accessories 31
Technical data 34
Technical data of drive 35

4
REMKO VRS
Safety information
Unit description
The heaters were subjected to
extensive material, functional and
quality inspections and tests prior
to delivery. However, the heaters
may constitute a hazard if used by
untrained personnel, improperly or
not for the intended purpose.
The following information must be
observed:
■ The heaters must only be used
by persons who have been
trained in its operation.
■
The heaters must be installed
and operated in a manner that
excludes any risk to persons
through radiated heat and the
risk of fire.
■
The heaters must only be in-
stalled and operated in rooms if
they are supplied with a suffi-
cient air volume for combustion.
If this cannot be ensured, the
burner must be supplied with
fresh air from outside via a
separate air intake system.
■
The heaters must only be
installed on a flame-retardant
surface.
■
The heaters must only be
attached to constructions
designed to the take the weight
or to ceilings of flame retardant
materials with sufficient load
bearing capacity.
■
Attachment must take place
using suitable anchors to be atta-
ched to the heater.
■
The heaters must not be installed
and operated in locations
where there is a risk of fire and
explosion.
■
The heaters must be installed
outside traffic zones, e.g. also
the operating areas of cranes.
■
A protection zone of 1 m dis-dis-
tance must be kept free.
■
The air intake grilles must always
be kept free of dirt and loose
objects.
■
Never insert foreign objects into
the heater.
■
The heaters must not be ex-The heaters must not be ex-
posed to a direct jet of water,
e.g. high-pressure cleaning
equipment, etc.
■ Never allow water to enter the
inside of the heater.
■
All electrical cables of the heaters
must be protected against dam-
age (e.g. also from animals).
■
Portable fuel tanks must only be
installed and used in compliance
with the technical directives for
flammable liquids „TRbF 20“.
■ This unit can be used by child-
ren above the age of 8, as well as
by people with impaired physical,
sensory or mental capabilities or a
lack of experience and knowledge
if they are supervised or have
received instruction in the safe
operation of the unit, and if they
understand the associated poten-
tial hazards. Children must never
play with the unit. Cleaning and
user maintenance must not be car-
ried out by unsupervised children.
Operation of the heaters must always take place in compliance with the local building
and fire protection regulations and regulations of the employers‘ liability insurance
associations.
The heaters are stationary, directly
fired hot air heaters with heat ex-
changer and chimney connection.
The heaters can be fired with fuel
oil EL, diesel fuel and liquid or
natural gas.
The heaters are designed
exclusively for operation with
separate fan burners in single-
stage operation.
Standard two-stage fan burners
can also be used to prevent the
formation of condensation during
start-up (as starting relief) in the
partial load range.
For reliable discharge of the
exhaust fumes via the roof, the
heaters must be connected to a
suitable chimney system.
The heaters are provided with
standard single-stage, low noise/
low maintenance radial fans and
mounted and electrically wired
switching and control units.
The heaters are built to give many
years of efficient service due to
their robust design and the use of
high-quality materials.
NOTE
The heaters are not suitable for
domestic heating or similar.
ATTENTION
Where delivery from the
factory takes place without fan
burner and a different make of
burner is used, the suitability
of the burner for the particular
type of hot air heater must be
ensured.
NOTE
Only type tested hot air heat-
ers with forced-air oil burners
complying with
DIN EN 230 and DIN EN 267
must be used.

5
Heater applications
The directly fired hot air heaters
supply instantaneous heat.
The heaters are designed exclu-
sively for industrial and commercial
use.
The heaters can be fitted with inlet
and outlet air ducts with appropri-
ate dimensioning.
There are generally no operating
restrictions with regard to the site
of installation.
Heater applications also include:
■ Heating workshops
■ Heating warehouses
■ Heating exhibition halls
■ Heating fair halls
■ Heating light-weight construc-Heating light-weight construc-
tion halls
■ Heating showrooms
■ Heating in horticulture and
agriculture
Mode of operation
After switching on the heaters by
setting the switch to the „Heat“ or
„I“ position, the forced-air burner
starts.
The „Burner“ indicator light on the
control box lights up for control
purposes in the case of the 400V
heater types.
The combustion chamber with
heat exchanger is now heated.
After reaching the set tempera-
ture, the supply air fan switches on
automatically.
The „Fan“ indicator light on the
control box lights up in the case of
the 400V heater types.
Hot air is blown out.
When using a room thermostat,
the described sequence is auto-
matically repeated depending on
the heat requirement.
All heater functions take place
fully automatically and are reliably
monitored by means of the triple
function combination controller
and burner relay (integral part of
the force-air burner).
After switching off the heater via
the switch or room thermostat,
the supply air fan continues to run
until the combustion chamber and
heat exchanger have cooled down
and subsequently switches off
automatically.
In the event of irregularities or
extinguishing of the flame, the
burner is shutdown by the burner
relay and interlocked.
The fault indicator light of the
burner relay and the „Burner“
fault indicator light on the control
box light up in the case of the
400V heater types.
Restarting can only take place after
manual release of the burner relay.
The safety temperature limiter
(STB) interrupts the burner func-
tion on overheating.
Manual release of the STB can take
place only when the heater has
cooled down.
The fan motor in the case of the
400V heater types is monitored
by means of a thermal overcurrent
relay.
On motor overload, operation is
interrupted by the relay and the
red „Fan“ fault indicator light on
the control box lights up.
Release is only possible after reset-
ting the relay in the control box.
The heaters must never be
disconnected from the mains
supply before the cooling
down phase has ended (except
in emergency situations).
ATTENTION
ATTENTION
The heaters are intended
exclusively for industrial and
commercial use. They are not
intended for domestic heating
or similar.
NOTE
Before releasing the burner
relay or overcurrent relay,
the cause of shutdown must
always be determined first.
Further plus points include quick
and easy installation and ease of
servicing.
The heaters comply with the basic
health and safety requirements of
the pertinent EU regulations and
are easy to operate.

6
REMKO VRS
The three functions of the
combination controller:
1. Fan controller (TR)
Controls the fan on and off
function. The switching point
can be set via the „TR control
lever“.
Set value about 40°C
2. Temperature monitor for the
burner (TW)
The temperature monitor limits
the air outlet temperature. The
switching point can be set via the
„TW control lever“.
Set value about 80 – 85°C
Safety devices
3. Safety temperature limiter (STB)
The STB controls the tempera-
ture monitor.
Switching point permanently
set to 100°C.
A restarting lockout prevents
the burner from being restarted.
The reset button (RESET) must
be actuated manually from
outside with the housing cover
closed.
Triple function combination
controller
The triple function combination
controller has a sensor monitor
and is cold resistant to -20°C.
The heater switches off at a tem-
perature below -20°C and switches
on again when the temperature
rises.
In the event of damage to the sen-
sor or capillary tube and on reach-
ing a temperature of about 220°C,
the filling medium is drained and
the combination controller switch-
es off towards the safety side. The
combination controller is no longer
functional and must be replaced.
For replacement of the triple func-
tion combination controller, the
following information must also
be observed:
■ The capillary tubes must not
be damaged or bent during
installation.
■ Any bending must take place
only on the capillary tube and
not on the sensor.
■ To ensure that the heater func-
tions reliably, the sensors must
always lie freely in the hot air
stream.
■ The sensors must always be
free of dust and dirt.
■ Capillary tubes and sensors
must not be damaged in any
way.
■ The sensors must not have
contact with the combustion
chamber or other metal parts.
Triple function combination controller according to
DIN EN 14597
Oil or gas-fired hot air heaters must be fitted with intrinsically safe
control devices complying with DIN EN 14597.
REMKO triple function combination controller
STB
123456
20
80
80
90
70 70
60
50
40
30
°C °C
TR TW
RK-WTHC-2280
# 1102572
NOTE
When replacing the triple
function combination control-
ler, only a REMKO original
replacement must be used!
ATTENTION
Installation and assembly
must be carried out carefully
and professionally.
Controller shown without housing cover
ATTENTION
To prevent the operating tem-
perature being exceeded again,
the operating conditions of the
heater must be checked prior
to resetting/releasing the STB.
ATTENTION
safety devices must not be
overridden or blocked during
heater operation.

7
The four functions of the
combination controller:
1. Fan controller (TR)
Controls the fan on and off
function. The switching point
can be set via the „TR control
lever“.
Set value about 40°C
2. Temperature monitor for the
burner (TW)
The temperature monitor limits
the air outlet temperature. The
switching point can be set via the
„TW control lever“.
Set value about 75 – 80°C
3.Temperature switch for the
second stage of the burner
(burner 1)
The temperature switch controls
the stage of the burner.
The switch point is set relative to
the temperature monitor via the
“differential control lever”.
Setpoint value approx. 10-15 K
4. Safety temperature limiter (STB)
The STB controls the tempera-
ture monitor.
Switching point permanently
set to 100°C.
A restarting lockout prevents
the burner from being restarted.
The reset button (RESET) must
be actuated manually from
outside with the housing cover
closed.
Fourfold function combinati-
on controller
The fourfold function combination
controller has a sensor monitor
and is cold resistant to -20°C.
The heater switches off at a tem-
perature below -20°C and switches
on again when the temperature
rises.
In the event of damage to the sen-
sor or capillary tube and on reach-
ing a temperature of about 220°C,
the filling medium is drained and
the combination controller switch-
es off towards the safety side. The
combination controller is no longer
functional and must be replaced.
For replacement of the fourfold
function combination controller,
the following information must
also be observed:
■ The capillary tubes must not
be damaged or bent during
installation.
■ Any bending must take place
only on the capillary tube and
not on the sensor.
■ To ensure that the heater func-
tions reliably, the sensors must
always lie freely in the hot air
stream.
■ The sensors must always be
free of dust and dirt.
■ Capillary tubes and sensors
must not be damaged in any
way.
■ The sensors must not have
contact with the combustion
chamber or other metal parts.
Fourfold function combination controller according to
DIN EN 14597
Oil or gas-fired hot air heaters must be fitted with intrinsically safe
control devices complying with DIN EN 14597.
REMKO fourfold function combination controller
NOTE
When replacing the fourfold
function combination control-
ler, only a REMKO original
replacement must be used!
Controller shown without housing cover
70
80
60
°C
TW
50 STB
20
80
70 60
50
40
30
°C
TR
RK-WTHFC-223V80/U-SW
# 1104270
123456789
10 11 12
+-
To prevent the operating tem-
perature being exceeded again,
the operating conditions of the
heater must be checked prior
to resetting/releasing the STB.
ATTENTION
!
safety devices must not be
overridden or blocked during
heater operation.
ATTENTION
!
Installation and assembly
must be carried out carefully
and professionally.
ATTENTION
!

8
REMKO VRS
Selection of site of
installation
The following must be observed
when selecting the site of
installation:
1. Fire protection and operational
hazards.
2. Function:
Room heating free blowing or
with duct system.
Observe pressure conditions at
site of installation .
3. Operational requirements:
Heat requirements, air volume
flow, air circulation and out-
side air operation, humidity, air
distribution, room temperature,
space requirement.
4. Option for connection to a
chimney system.
Oil and gas-fired hot air heaters
(also with a nominal heat output
above 50 kW) may generally be
installed outside heating rooms in
compliance with the Ordinance on
Firing Installations (FeuVo).
The guidelines of the building su-
pervisory authority for the „instal-
lation of heat generating systems“
must be observed.
Locations in which flammable sub-
stances or mixtures are processed,
stored or produced in quantities
liable to be hazardous in the event
of ignition may be subject to ex-
ceptions if it is ensured by suitable
measures that the substances or
mixtures cannot ignite due to the
heat generating system.
Installation of the heaters must
generally take place in compliance
with the directives of the buil-
ding regulations (LBO) and the
Ordinance on Firing Installations
(FeuVO) of the respective federal
state.
The First Ordinance on the imple-
mentation of the Federal Immissi-
on Control Act (1st BImSchG) and
the subsequently issued statutory
requirements of the Ordinance
on Small Firing Installations (1st
BImSchV) must also be taken into
account.
Hot air heaters in particular are ex-
cluded in some respects however.
Installation instructions
s s s
Combustion air supply
A sufficient supply of combustion
air must generally be ensured by
the respective requirements of the
building supervisory authority.
Extracts from M-FeuVO (Speci-
men Firing Ordinance) (may vary
between federal states).
(1) For non-roomsealed heating
appliances with a total nominal
heat output of up to 35 kW,
the combustion air supply is
deemed verified if the heating
appliances are installed in a
room with:
1. Minimum one door leading
to the outside or one window
that can be opened (rooms
leading outdoors) and having
a cubic capacity of minimum 4
m3per kW total nominal heat
output.
2. An opening leading to the
outside with an internal cross-
section of minimum 150 cm2
or two opening each 75 cm2
or pipes leading to the outside
having cross-sections equiva-
lent to the flow.
(2) For non-roomsealed heating
appliances with a total nomi-
nal heat output of more than
35 kW and not more than 50
kW, the combustion air supply
is deemed as verified if the
heating appliances are installed
in rooms that comply with the
requirements specified in Sec-
tion 1 No. 2.
(3) For non-roomsealed heating
appliances with a total nominal
heat output of more than 50
kW, the combustion air supply
is deemed as verified
NOTE
Only type tested hot air heat-
ers with forced-air oil burners
(complying with DIN EN 267)
or gas burners (complying with
DIN EN 676) must be used.
NOTE
Where delivery from the fac-
tory takes place with an oil or
gas burner, separate operating
instructions for the burner are
enclosed.
ATTENTION
The heaters must be in-
stalled and mounted so that
they are easily accessible for
monitoring,repair and mainte-
nance.
ATTENTION
Low or excess pressure in the
installation location must be
avoided as this can result in
combustion problems.

9
■ The heaters must be installed
and mounted so that they are
easily accessible for repair and
maintenance.
■ Operating elements whose
improper operation can result
in dangerous operating condi-
tions must be protected against
unauthorised use if they are
generally accessible.
■ Direct suction of the outside air
with the standard combustion
chamber is not recommended.
During installation of the
mixed-air flaps (accessories),
these must be connected work-
ing in opposite directions.
The supplied fresh air volume
should not exceed 30%.
■ The heaters must not be in-
stalled and operated in rooms
and locations subject to fire and
explosion.
if the appliances are installed in
rooms that have an opening or
pipe leading to the outside.
The cross-section of the opening
must be minimum 150 cm2and
2 cm2more for each kW nominal
heat output above 50 kW nominal
heat output.
The pipes must be dimensioned
equivalent to the flow.
The necessary cross-section may
be divided into maximum two
openings or pipes.
(4) Combustion air openings and
pipes must not be sealed or
closed unless it is ensured by
separate safety devices that the
heating appliance can only be
operated when the closure is
open. The necessary cross-sec-
tion must not be constricted by
the closure or grille.
(5) A sufficient combustion air
supply can be verified for non-
roomsealed heating appliances
using a different method than
that specified in paragraphs 1
to 3.
For example by:
A continuous pipe of sufficient
cross-section connected to the
burner or its burner housing
leading to the outside. This
cross-section must be adapted
to the available suction capac-
ity and the pipe resistances
(including air inlet grille) so that
perfect combustion is ensured.
Installation
■ The heaters must only be
installed and operated in rooms
if they are supplied with suf-
ficient air volume for combus-
tion and the exhaust fumes are
discharged to the outside via a
suitable chimney system
■ Non-roomsealed heating appli-
ances may be installed in rooms
or buildings from which air is
extracted with the aid of fans or
ventilation systems, etc., only if:
1. Simultaneous operation of
the heating appliances and air
suction system(s) is prevented
by means of safety devices.
2. The chimney duct is moni-
tored by means of special safety
devices.
3. The exhaust fumes of the
heating appliances are filtered
via the air suction system(s).
4. It is ensured by the type of
construction or dimensioning of
the system that no dangerous
low-pressure can occur.
■ The heaters must be installed
on sturdy, flame retardant sur-
faces and outside traffic zones,
e.g. also the operating areas of
cranes.
■ The heaters must be installed
and operated in a manner that
excludes any risk to persons
through radiated heat and the
risk of fire.
■ The heaters must be installed
so that they do not consti-
tute a hazard or unreasonable
nuisance, e.g. through shocks,
vibrations or noise.
s s s
ATTENTION
Standard type heaters are not
suitable for exclusive use as
ventilation units.
NOTE
The heaters are suitable for the
use of inlet and outlet sided
accessories.

10
REMKO VRS
Floor mounting
The heaters must be installed on
stable, flame retardant surfaces
and outside traffic zones, e.g. the
operating areas of cranes.
For the protection of the heaters
against damage in commercial
locations, for unhindered mainte-
nance and repair of the heater and
burner as well as unhindered air
suction and blowing, a protection
zone at a distance of 1 m around
the heating appliance must be kept
free.
This protection zone must be
marked by a sign with the follow-
ing inscription:
A permanent barrier for frequently
accessed areas is recommended.
Wall mounting
The wall to be used for mounting
purposes must be of flame retard-
ant materials. The loading bear-
ing capacity of the wall must be
verified (reinforcements must be
provided if necessary).
The brackets must be firmly fas-
tened to the wall and the heaters
securely fixed to these.
Sufficient free space for main-
tenance of the heat exchanger,
burner, fan and chimney system
must be provided.
■ Operating devices for the
heater and fuel supply must
be able to be operated from
ground level.
■ Where auxiliary equipment is
required for monitoring, main-
tenance and repair, this must be
provided by the operator.
Suspended heater installation
The heaters must only be attached
to constructions designed to take
the weight or to ceilings of flame
retardant materials with sufficient
load bearing capacity.
Attachment must take place using
suitable anchors to be securely
attached to the heater.
The requirements specified in the
Section „Wall mounting“ must be
observed.
Room heating
Hot air heaters must only be oper-
ated in closed rooms and halls via
a room thermostat.
Fuel supply
The fuel supply must be installed in
compliance with the requirements
of DIN 4755 for oil-fired hot air
heaters, DIN 4756 and DVGW
worksheet G 600 for gas-fired hot
air heaters and TRF for liquid gas.
It must be ensured for fuel oil
piping in particular that the cross-
section of the piping is of sufficient
size.
The suction height, total pipe
resistances and increased viscosity
at low temperatures must be taken
into account in dimensioning of
the system.
Suitable, separate oil supply units
must be provided if necessary.
The pipes must be installed so
that they are easy to vent and
protected against corrosion and
mechanical damage.
Electrical installation
It must be ensured that an im-
permissible undervoltage due to
intermittent system overload is not
possible.
The cables used for connection
of the heaters must have a cross-
section of sufficient size in order
to avoid any impermissible voltage
drop when the fans start.
For connection of the 400V
type heaters, the correct phase
sequence of the rotating field
(clockwise) must be ensured.
Incorrect connection can result in
an incorrect direction of rotation of
the fan.
An emergency switch must be pro-
vided at an easily accessible point
in the installation room for heaters
with a nominal heat output from
50 kW.
Protection zone
Keep free at a distance of
1 m
s s s
ATTENTION
The measured pressure in the
suction pipe should not exceed
minus 0.3 bar; it can be maxi-
mum minus 0.4 bar.
ATTENTION
All switches, if generally ac-
cessible, must be protected
against damage and unauthor-
ised use.
ATTENTION
Electrical heater connection
must be carried out by author-
ised specialists as defined in
DIN EN 60335-1 and DIN EN
50156-1.

11
The heaters must be connected to
a suitable and approved chimney
system.
Chimney systems are structural
systems in or on buildings which
are solely intended for discharging
exhaust fumes from heat generat-
ing systems safely via the roof.
The following are of particular
importance for the planning and
erection of chimney systems:
■ The respective Ordinance on
Firing Installations (FeuVo),
■ The respective building regula-
tions (LBO).
■ DIN 18160, part 1, design and
performance.
■ DIN EN 13384, part 1, calcula-
tion of firing installations.
■ Technical directives for gas
installation DVGW-TRGI 2008
For the design and installation of
chimney systems, the following
must be observed:
■ Installation and erection of the
chimney system must be carried
out professionally and in com-
pliance with the respectively
applicable regulations.
■ The dimensions of the chimney
pipe must correspond to the
power of the unit, structural
conditions and specific require-
ments.
Annual inspection
and maintenance
Depending on the particular
operating conditions, the heating
appliances should be inspected by
an expert for reliable operation as
necessary, however at least once a
year.
The operator is obliged to have
the heating appliances inspected
at least once a year for correct
operation, reliability, efficiency and
maintenance of emission limits by
a representative of the manufac-
turer or other authorised specialist.
The measurement of combustion
values must take place in accord-
ance with the statutory require-
ments of the Federal Immission
Control Act (BImSchV).
Where faults are discovered,
the operator must be notified
that he is obliged to arrange for
immediate repair or replacement of
components.
The following applies:
Repairs to limiting devices, auto-
matic actuators, flame monitoring
devices and other safety devices
must only be carried out by the
respective manufacturer or his
representative on the individual
device.
Chimney duct
s s s
■ Chimney systems must be di-
mensioned according to internal
cross-section and height so that
the exhaust fumes are dischar-
ged to the outside in all normal
operating conditions and no
dangerous positive pressure can
occur with respect to rooms
■ The outlets of chimney systems
must rise minimum 40 cm abo-
ve the ridge or be minimum 1
m away from the roof.
■ Where dynamic pressures are to
be expected, e.g. due to down
winds or from neighbouring
buildings, the chimney coping
must be designed appropriately.
■ In the case of roof or wall
openings, the chimney system
must be lead through tubular
sleeve or shaft to enable free
expansion of the chimney pipe
on heating.
■ Connection of the heating ap-
pliance must take place tightly
sealed and protected against
accidental loosening by means
of rivet or screw.
■ Horizontal chimneys should
preferably be kept as short as
possible.
■ A reclosable measuring open-
ing must be provided in the
chimney pipe downstream of
the appliance connection at a
distance of 2 x D ( Ø).
NOTE
The erection of the chimney
system requires permission in
any event.
ATTENTION
It must be ensured that no
back pressure occurs due to an
incorrectly installed chimney
duct.
NOTE
It is recommended to conclude
a maintenance contract with
an authorised specialist com-
pany for regular maintenance
and cleaning.

12
REMKO VRS
Application examples:
REMKO chimney system ASD
Double-walled stainless steel
Outdoor installation
REMKO chimney system ASE
Single-walled stainless steel
Indoor installation
The chimney system components
are easily connected by insertion
and securing with clamps.
All REMKO stainless steel chimney
systems are generally approved for
building installation by the Institute
for Structural Engineering.
Legend:
1 = Chimney outlet seal AS-ME-D
2 = Chimney pipe AS-1000-D
3 = T-connection AS-T90-D
4 = Door for cleaning AS-RT-D
5 = Base plate AS-GI-D
6 = Wall bracket AS-WK-D
7 = Transitional piece AS-ÜGI-D
8 = Chimney pipe AS-1000-E
9 = Chimney pipe AS-500-E
12 = Wall bracket
Example of vertical installation
Example of horizontal installation
7
12
1
2
3
4
5
6
8 / 9
1
2
3
4
5
6
7
8 / 9
We reserve the right to make dimensional and design changes in the interest of technical advances.
Additional specifications for fresh air and flue
gas ducting
The following applies to all models in the VRS
range:
Air heater B1: No
Air heater C2: No
Air heater C4: No

13
For installation of the heating
appliances, the requirements
and regulations applicable in the
respective federal state must be
observed.
The following must also be
observed:
■ The heating appliances must be
securely installed.
■ The heating appliances must
be floor-mounted securely
and stress-free, preferably on
a separate vibration damped
base.
■ It must be ensured that the
fan output (nominal pressure)
corresponds to the respective
air-sided resistances.
Measure rated current!
■ The air inlets and outlets must
be kept free.
■ A sufficient supply of combus-A sufficient supply of combus-
tion air must be ensured.
■ In the event that excess or low
pressure or high air contamina-
tion should occur in the instal-
lation room, a separate burner
fresh air intake unit (accessory)
must be installed.
■ Where high air contamination
is expected in the installation
room, the circulated air should
be drawn in via appropriate
filters (accessory).
The resistance on the air inlet
side should be noted and the
fan power adjusted accor-
dingly!
Room thermostat connection
The room thermostat (accessory)
must be mounted at a position
which is easy to access for tem-
perature control.
The thermostat sensor may not be
located directly in the hot/cold air
stream and should not be mounted
directly on a cold
surface.
The procedure is the same for the
installation of an automatic day/
night temperature control or other
temperature controls available as
accessories.
230V type heaters
The connection of a room thermo-
stat or a day/night temperature
control for 230V types takes place
in the control box at the ther-
mostat plug socket provided as
standard.
Connection must be carried out as
follows:
Disconnect the existing shunt plug
and connect thermostat plug 2 to
thermostat plug socket 1 on the
control box.
Thermostat plugs are available as
an accessory (EDP No. 1101020)
for control units supplied without
these standard plugs.
Installation and assembly
2
1
Chimney connection
Connection must comply with DIN
18160, part 1 and the dimensions
with DIN EN 13384, part 1.
■ Correct chimney duct installati-
on must be ensured.
■ The chimney connection must
be connected correctly and in
compliance with the applicable
regulations.
■ The chimney connection
must only be connected to a
previously approved chimney
system.
Electrical connection
Electrical connection of the heating
appliance must be carried out by
authorised specialists as defined
in DIN EN 60335-1 and DIN EN
50156-1.
■ An emergency switch must be
provided at an easily accessible
point for heaters with a nominal
heat output above 50 kW.
■ The emergency switch must be
protected against unauthorised
use.
ATTENTION
Die Transportpalette bzw.
die The transport pallet and
timbers must be removed
prior to installation.
NOTE
Air intake must only take place
via the air intake openings
provided.
If the heater does not have an
air intake at the bottom, this
must be sealed to prevent the
intake of extraneous air.
NOTE
All electrical wiring terminals
must be checked for tightness
and retightened if necessary.

14
REMKO VRS
400V type heaters
The connection of a room thermo-he connection of a room thermo-
stat or a day/night temperature
control takes place for these types
at the respective terminal strips in
the control box.
Connection must be carried out as
follows:
Remove the factory cable link and
connect the wires of the respective
control unit to the terminals.
The separate wiring diagrams of
the control unit and appliance
must be observed!
400 V direct and Y / Δstarting
Terminal strip X2
■ The burner must be set to the
full heat load of the appliance.
■ The combustion chamber must
not be overloaded
(increased condensate forma-
tion).
■ The exhaust fume temperature
should be about 180 Kelvin
above room temperature.
There is otherwise the risk
of increased condensate
formation
!
■ The separate operating instruc-
tions of the factory supplied
burner must be observed.
■ When using forced-air burners
of other manufacturers, their
suitability for the appliance
must be verified (hot air heater
type).
Gas connection
A sufficient gas volume and gas
pressure corresponding to the
power of the heating appliance
must constantly be available whilst
the appliance is in use.
■ Installation of the gas connec-
tion must only be carried out by
authorised specialists.
■ To be observed are the DVGW
worksheet G 600 for gas-fired
hot air heaters and TRF for
liquid gas.
■ Gas pressure regulating devices
and shut-off valves must be
provided on site.
■ The cable cross-section must
be dimensioned, taking into
account the installed load of the
appliance, total line resistance
and gas pressure.
factory cable
link
1 2
NOTE
Prior to initial use, the gas
supply pipe must be cleaned
thoroughly and checked for
leaks!
Fuel oil connection
A sufficient and correct fuel supply
must be ensured.
■ The suction pipe must be provi-
ded with a foot valve in the fuel
oil tank.
■ Free flowing fuel oil must be
available in sufficient quantity
also at low outside tempera-
tures.
Paraffin formation can occur
already from about 5°C depen-
ding on the fuel oil quality.
Appropriate measures must be
taken to prevent this occurring!
Burner installation
The factory supplied forced air-
burner is mounted on the front
of the appliance with a clamping
flange.
The following must be observed:
■ Only type-tested hot air heat-type-tested hot air heat-
ers with forced-air oil burners
complying with DIN EN 267 or
forced-air gas burners (comp-
lying with DIN EN 676) may be
used.
■ Power limitation for single-
stage burner operation (up to
70 kW) is not required for hot
air heaters.
ATTENTION
Installation, adjustment and
maintenance of the gas supply
must only be carried out by
specialists authorised by GVU!

15
■ Y / Δ- starting
The measured rated current
must not exceed the value
shown on the motor rating
plate.
Thermal overcurrent relay
The function of the overcurrent
relay or its setting can be checked
by removing a fuse.
A correctly operating relay must
operate after about 30 seconds.
Excessive current
consumption
If the fan motor should consume
excessive current despite correct
electrical connection and sufficient
system voltage, under no circum-
stances must the overcurrent relay
be set higher or overridden.
In this case, the air-sided resist-
ances (inlet/outlet side) must be
checked for correct dimensioning.
Suitable measures must be pro-
vided for this purpose.
Commissioning
Commissioning
Commissioning of the unit and the
forced-air burner must take place
by the manufacturer or a specialist
authorised by the same. All regu-
lating, control and safety devices
must be checked for their proper
functioning and correct adjust-
ment.
■ The commissioning of oil and
gas-fired heating appliances
must always be carried out by
authorised specialists.
■ All bolts and nuts of the fan
and burner mounts must be
checked for tightness.
■ All air outlet grilles must
be opened and adjusted if
necessary.
■ The settings and function of
the triple function combination
controller must be checked.
■ Switch on the local main switch
or fuses.
■ Set the room thermostat
higher than the existing room
temperature.
■ Open the fuel supply and
switch the switch to the „Heat“
position.
Factory supplied oil burners
start with a delay due to the
standard oil preheating (up to
VRS 50E)!
■ The fuel oil or gas flow rate
must be adjusted appropriate to
the heat load of the appliance.
See appliance rating plate!
Commissioning of fan motor
Testing drive
1. The mounting screws of the
complete drive must be checked
for tightness.
2. The initial tension of the drive
belt(s) must be checked.
Current consumption
measurement
1. To prevent incorrect measure-
ments, the grilles in the air
duct or air outlet hood must be
opened.
All supplied air inlet and metal
panels must be mounted on the
appliance.
2. Check the system voltage for
correctness.
3. Carry out the necessary meas-
urements and adjust settings as
required.
■ Direct starting
The measured rated current
must not exceed the value
shown on the motor rating
plate.
Check the thermal overcurrent
relay appropriate to the rated
current of the drive motor and
adjust if necessary.
NOTE
In order to exclude measure-
ment errors, each phase should
be measured separately.
ATTENTION
The thermal overcurrent relay
must only be operated in a
manual mode.
Under no circumstances must
the relay switch on again
automatically
ATTENTION
The fan must be checked for
correct direction of rotation.
NOTE
The rated current of the drive
motor must be multiplied by
the factor 0.58.
Check the setting of the
thermal overcurrent relay with
respect to the calculated value
and correct if necessary.

16
REMKO VRS
Heating
The appliances operate fully auto-
matically depending on the room
temperature.
1. Switch on the local main switch
or fuse(s).
2. Open the fuel supply.
3. Set the desired temperature on
the room thermostat.
4. Set the switch on the control
box to the „I“ or „Heat“
position.
It should be noted that the forced-
air burner starts immediately on
heat demand (except VRS 25 and
50), however the supply air fan
initially starts automatically when
the set temperature is reached.
This prevents cold air from being
blown out.
Set the switch on the control box
to the „0“ position.
The supply air fan continues to
operate to cool the heat exchanger
and can start several times up to
final switch off.
For extended periods of
non-use, the units
should be disconnected
from the power supply
and the fuel supply
shut-off.
Switching off
230V type
400V type
Ventilate
1. Set the switch on the control
box to the „II“ or „Ventilate“
position.
In this switch position, the supply
air fan runs continuously.
The appliances can be used for air
circulation or ventilation purposes.
Thermostatic control is not
possible.
■ The burner must be set to the
values specified by the manu-
facturer, however at least to the
values specified by the Federal
Immission Control Act.
■ A measuring report must be
prepared and handed to the
operator for safe keeping.
■ The operator must familiarise
himself with the operation of
the system.
■ The responsible authori-
ties must be provided with a
declaration from the specialist
company and certificate of the
installer.
Information on corrosion in
heat exchangers.
■ It must be ensured that the
exhaust fume temperature
difference of 180 Kelvin is not
reached.
This prevents the risk of cool-
ing below the dew point and
related corrosion in the heat
exchanger to a large extent.
ATTENTION
The heater must never be
disconnected from the mains
supply via the main or emer-
gency switch before the cooling
down phase has ended (except
in emergency situations).
NOTE
If the heaters are not set to
their nominal heat load (see
rating plate) or are dimensi-
oned too large for the neces-
sary heat requirement, the bur-
ners operate in an intermittent
mode.
As the necessary operating
temperature of the heat ex-
changer cannot be reached in
intermittent operation, increa-
sed condensation unavoidably
occurs with the consequence
of higher corrosion in the heat
exchanger.
0
I

17
The operator is obliged to have the
system inspected at least once a
year for correct operation, reli-reli-
ability, efficiency and maintenance
of emission limits by an authorised
specialist
■ The complete heating appliance
including heat exchanger, com-
bustion chamber and forced-
air burner must be cleaned to
remove adhering dust and dirt.
■ The combustion residues in the
combustion chamber and heat
exchanger must be removed by
suitable means.
■ The V-belt tension and motor
mount must be checked at
regular intervals.
■ Wearing parts such as flue gas
brakes, seals, oil filter element
and oil nozzles, etc. must be
checked and replaced if neces-
sary.
■ The maintenance instructions of
the separate forced-air burner
must be observed in any event.
Cleaning and maintenance
Rußschichtdicke [mm]
01,0 2,0 3,0 4,0
Wirkungsgradverluste [%]
Anstieg der Abgastemperatur [K]
40
0
80
120
160
200
6
0
8
10
12
14
4
2
■ The limitation of exhaust fume
losses must be maintained in
accordance with § 1, paragraph
1 of the Ordinance on Small
Firing Installations (1st BIm-
SchV).
■ The verification of work carried
out by authorised specialists in
addition to the usual reports
must be provided in any event.
Soot deposits
Small soot deposits on the heat
transfer surfaces of the combus-combus-
tion chamber and heat exchanger
degrade heat emission.
This reduces the overall efficiency
of the system.
A soot layer of 1 mm thickness
causes an exhaust fume tempera-
ture increase of about 50 K
(see diagram).
This shows that an optimal burner
setting and regular maintenance
are essential for maintaining the
efficiency and emission limits.
ATTENTION
Prior to carrying out main-
tenance or repairs, the unit
must be disconnected from the
mains supply.
ATTENTION
It does not suffice to switch off
the unit only via the switch!
ATTENTION
Adjustment and maintenance
of the forced-air burner must
only be carried out by autho-
rised specialists.
NOTE
It is recommended to conclude
a maintenance contract with
an authorised specialist com-
pany for regular maintenance
and cleaning.
ATTENTION
If the operational cleaning and
burner adjustment intervals are
not maintained, the warranty
will be invalidated!

18
REMKO VRS
Cleaning the combustion
chamber and heat exchanger
1. Disconnect the appliance from
the mains supply.
2. Shut off the fuel supply.
Remove the following
components:
1. The forced-air burner.
2. Burner plate with burner
flange.
3. Front lining plate(s).
4. One side lining plate (left or
right depending on structural
conditions).
5. The two front inspection
covers.
6. The side inspection cover.
7. Remove the flue gas brakes
from the heat exchanger
tubes and clean or replace if
damaged.
The correct assignment of
the exchanger tubes must be
ensured!
8. Clean the heat exchanger
tubes with suitable cleaning
agents to remove adhering
combustion residues.
9. Remove the combustion resi-
dues from the front and rear
collection boxes  with a
suitable vacuum cleaner.
Fig. VRS 50 vertical
without burner
10. The combustion residues in the
combustion chamber must be
removed though the burner
opening also using a suitable
vacuum cleaner.
A special boiler cleaning set
for the REMKO industrial
vacuum cleaner is available as
an accessory.
11. After cleaning, all parts must
be carefully refitted in reverse
order.
12. The correct assignment of the
exchanger tubes and correct
seating of all seals must be
ensured.
Damaged or deformed seals
must be replaced.
13. Burner maintenance must be
carried out as specified in the
separate operating instructions
of the burner.
3
5
6
1
2
4
7
8
8
ATTENTION
It does not suffice to switch off
the unit only via the switch!
NOTE
The limitation of exhaust fume
losses must be maintained in
accordance with §11 of the
Ordinance on Small Firing
Installations (1st BImSchV).
ATTENTION
The burner and all control
units must be checked for per-
fect functioning.

19
Troubleshooting
Possible causes:
■ The heaters could not cool
down because the power supply
was interrupted.
A brief interruption of the pow-
er supply can also cause the STB
to operate.
■ The temperature of the air
being blown out is too high due
to incorrectly installed chimney
ducts or adjusted grilles.
■ The fan was overloaded and the
thermal overcurrent relay of the
400V type heater or thermal
contacts in the fan motor of
the 230V type heater have
operated.
■ The V-belt for the fan drive is
loose or faulty.
■ The air inlet or outlet is not free.
■ Check the temperature control
thermostat (TR) for correct
functioning and adjustment.
■ Check the temperature monitor
(TW) for correct functioning
and adjustment.
The burner does not start
■ Check the oil filter for clogging.
Replace clogged filter(s).
■ Check that the shut-off valve
on the oil filter is open.
■ Check the fuel tank for suffi-or suffi-
cient fuel.
■ Check the fuel and filter for
paraffin separation.
Paraffin separation can occur
already below 5°C.
■ Check the oil hoses for damage
and leaks.
Air may also be sucked in!
■ Check the safety temperature
limiter (STB).
■ Check the temperature monitor
(TW).
The heater does not start
■ Check the local mains supply
connection.
■ Check the fuses in the control
box.
(Only 400V three-phase type)
■ Set the switch to the „I“ or
Heat position.
■ Check that the „Burner“ indi-
cator light on the control box
(only 400V type) is illuminated.
■ Check the thermostat connec-
tion or room thermostat cable.
■ Check the room thermostat
setting.
The temperature set must be
higher than the existing room
temperature.
■ Check whether the safety tem-
perature limiter (STB) may have
operated.
ATTENTION
Prior to carrying out main-
tenance or repairs, the unit
must be disconnected from the
mains supply.
ATTENTION
Prior to releasing a safety
device, the cause of operation
must be located and
eliminated.
NOTE
Safety devices must not be
overridden or blocked during
heater operation!

20
REMKO VRS
The supply air fan does not
start
Set the switch to the „II“ or „Ven-
tilate“ position.
The supply air fan should now
start!
If the fan does not start:
■
Check the local mains supply
connection.
■ Check the fan and drive for
smooth operation.
■ Check the V-belt of the fan
drive.
■ Check the electrical cables at
the fan motor for damage.
■ Check the fan to ascertain
whether it was overloaded
and if the thermal overcurrent
relay of the 400V type heater
or thermal contacts in the fan
motor of the 230V type heater
have operated.
■ Check the capacitor in the fan
of the 230V type heater.
230V type 400V type
■ Check the capillary tubes and
sensors of the triple function
combination controller for dam-
age and correct positioning of
the sensors.
■ Check whether the fault indi-
cator light of the burner relay is
illuminated.
■ If the fault indicator light is
illuminated, release the burner
relay by pressing the fault
button.
The fault indicator light
extinguishes and the burner
attempts to start!
■ With VRS 25 E and 50 heating
appliances, the burner starts
with a delay due to the oil pre-
heating
(only factory supplied burners)
ATTENTION
If the burner should shutdown
after starting due to a fault, a
release attempt can only take
place after five minutes.
No further release attempts
should be made in any event
due to a risk of deflagration.
ATTENTION
Repairs to the electrical instal-
lation and burner must only
be carried out by authorised
specialists for safety reasons.
ATTENTION
Adjustment and maintenance
of the appliance and forced-air
burner must only be carried
out by authorised specialists!
NOTE
If no result is achieved after
carrying out all functional
checks, an authorised service
station should be contacted.