REMKO GPS 20 Specification sheet

Operating and
installation manual
Edition EN - X10 Read the instructions prior to performing any task!
GPS 20, GPS 30, GPS 40, GPS 60, GPS 80
REMKO GPS series
Efficient, wall-mounted, automatic heater
with modulating gas burner

3
Content
Safety notes 4
Unit installation 5
Unit description 6-9
User manual 10-15
Intended use 16
Customer service and guarantee 16
Environmental protection and recycling 16
Installation 17-19
Exhaust gas connection 22-26
Electrical wiring 27-28
Electrical wiring diagram 29
Parameters of GPS board 30-31
Faults and fault analysis 32-33
Gas connection 34
Commissioning 35-36
Programming via LCD display 37-40
Maintenance 41-42
Replacement of the STB 42
Replacement of boards 43
Replacement of the gas valve 44
Conversion to liquid gas 45
Unit dimensions 46
View of the unit 47-49
Spare parts list 50
Country table of gas types 51
Technical data 52
Carefully read this operating manual prior to commissioning or using
the units!
This operating manual is a translation of the German original.
This manual is an integral part of the unit and must always be kept in
the vicinity of the installation location or on the unit itself.
Subject to modifications. No liability accepted for errors or misprints!

4
REMKO GPS series
Safety notes
The units have been subjected to extensive material,
functional and quality inspections prior to delivery.
However, dangers can arise from the units if they
are used improperly or not as intended by untrained
personnel!
Please observe the following notes:
■
The units may only be operated by persons that
have been instructed in their operation
■ In case of defects that endanger the operational
safety of the units, operation must be discontinued
■ The units must be installed and operated so
that the emerging flow of warm air does not
have harmful effects on either the units or the
surroundings
■ Do not expose the units to atmospheric influences
(rain, sun, etc.)
■ Do not touch the units with damp or wet body
parts, e.g. hands
■ Protect the units from spray water or other liquids
■ Do not use gas lines for the grounding of electrical
devices
■ Do not touch hot parts of the units, such as the flue
gas pipe
■ Do not touch moving parts of the units
■ Never insert foreign objects into the units
■ The units may only be mounted on stable structures
or ceilings made of non-flammable construction
materials and with sufficient bearing capacity
■ The units may only be mounted at the points
provided for this purpose in the factory
■ The units may not be installed or operated in
potentially flammable or explosive environments
■
The units must be installed away from traffic
zones - by crane, for example. A safety zone with a
clearance of 1 m must be ensured
Always observe the respective local building
code and fire prevention guidelines as well as the
guidelines of the accident prevention and insurance
associations when using the units.
■ Do not set down any objects on the unit
■
The protective grille of the intake must always be
kept free of dirt and loose objects
■ The units may not be exposed to direct jets of
water
■ The units must be inspected by a service technician
at least once yearly
■ Safety devices must not be bypassed or disabled!
■ Prior to maintenance or repair work, the gas
supply must be sealed off and the unit must be
disconnected from the mains at all poles.
(Remove fuse and switch off customer-provided
main/emergency shut-off switch).
■ The gas supply must comply with the specifications
on the name plate and the fuel flow setting must
correspond to the required power
■
The equipment may only be used with all safety
and monitoring installations, corresponding to the
applicable standards
Preventative measures
when a gas odour is noticed
1. Immediately switch off the unit.
2. Close the gas shut-off device(s).
3. Warn all directly endangered persons.
4. Open windows and doors.
5. Do not actuate electrical equipment such as light
switches or electrical plug-in contacts.
6. If the room in which the gas odour has emerged
cannot be entered, immediately contact the fire
brigade, police and the local responsible municipal
gas supplier.
CAUTION
Assembly, adjustment and maintenance work may
only be carried out by authorised and qualified
technicians.
NOTE
The units are to be used exclusively for industrial
and commercial applications. They are not
intended for the heating of living spaces or the
like.

5
Selection of the installation location
With determination of the installation location, the
requirements must be coordinated in regard to:
■ Fire protection and operational hazard
■ Function: Space heating, underpressure and/or
overpressure in the installation space, etc.
■ Operational concerns, heat requirement, nominal
air flow rate, air recirculation requirement,
humidity, room temperature, air distribution, spatial
requirements
■ Installation, repair and maintenance possibilities.
The units must be installed in such a way that they
are always easily accessible for maintenance and
repair work.
With improper installation and operation, hazards
may arise from the units. Prior to the planning and
during the unit installation, the following points must
absolutely be observed.
■ The units must be installed and operated in such a
way that personnel are not endangered by flue gas
and radiant heat and no fires may occur
■ During installation of the units it must be ensured
that the flow of warm air does not have damaging
effects on the surroundings
■ Fire hazards must be eliminated through the
selection of materials for the installation and
position surfaces. For this purpose, see TRGI,
Section 5.1.3.3
■ The wall or ceiling intended for installation must
also consist of non-flammable materials. Its load
capacity must be checked; reinforcements must be
installed when necessary
■ Brackets must be securely anchored to the wall
or ceiling and the units must be attached to the
brackets at the points provided for this purpose in
the factory
■ Appropriate maintenance possibilities for heat
exchangers, burners, fan and flue gas evacuation
must be planned for
■ It must be possible to actuate control elements
for the units and fuel supply from the ground.
Maintenance and repair possibilities must be
ensured by the operator
Unit installation
Application area
With the REMKO gas wall heaters from the GPS
range, it is possible to heat small rooms, such as
workshops, right through to large spaces such as
industrial warehouses, sports halls, etc.
For efficient heating it is therefore essential to
determine the necessary heat output by professionally
calculating the heat requirement for the respective
space.
General prerequisites
With the installation of the units, the local and federal
state-specific provisions and guidelines must be
observed in the respective valid version as a basic rule.
Work such as the following:
■ gas and electrical installation
■ conversion of the gas type
■ commissioning
■ Adjustments or maintenance
may only be carried out by qualified technicians
In addition to a faultless electrical and gas installation,
it is also ensured through this measure that all
necessary measurements and test are conducted.
■ The units must be inspected by an authorised
service technician at least once yearly.
For this purpose, concluding a service contract with
a service company is recommended
■ During planning and installation of the flue gas
routeing, the structural possibilities as well as the
applicable local and country-specific regulations
must be consistently adhered to
■ In heavily contaminated environments, care and
maintenance measures must be carried out in
accordance with the respective conditions.
The combustion air must be fed from outside as a
basic rule.
CAUTION
The units must not be set up or installed in areas
with explosive or corrosive atmospheres.

6
REMKO GPS series
side section the necessary components for the control
and safety are found behind the inspection door,
including e.g.:
- the electrical circuitry with the cabling
- the control electronics
- the gas valve
- the modulating gas burner
In the interior of the unit, directly in the circulation air
flow, is the combustion chamber with heat exchanger.
The combustion chamber is manufactured entirely
from Inox stainless steel, AISI 441. For increased
resistance to corrosion from damp vapours, Inox
stainless steel, AISI 441 is used for the heat exchanger.
The special form and the large surface area of the
combustion chamber and heat exchanger guarantee a
high level of efficiency and long service life.
The gas burner is likewise manufactured entirely from
special, mechanically-processed stainless steel.
Function of the units
The modulating, gas wall-mounted automatic heaters
of the GPS series has been developed for the heating
of industrial and commercial spaces.
The electronic control of the unit regulates the heat
output according to the actual requirement, between
minimum and maximum output.
With the pre-mix and modulation technology,
efficiency of up to 108% can be achieved.
The nominal heating capacity of the REMKO GPS
series lies between 4.7 and 82.0 kW.
The units consist primarily of the combustion chamber
with heat exchanger and the fan(s).
The ambient air is drawn in by the fan(s) and
efficiently channelled through the combustion
chamber with heat exchanger. The combustion
chamber is heated by the gas burner operation and
releases its heat to the air flowing past. The air heated
in this manner is blown out of the front side of the
unit through an adjustable outlet grille.
Operation of the unit as intended is only possible with
a connected temperature controller.
Unit description
Definition of the unit
Pursuant to EU Directives, the unit is defined as:
“Gas fan-assisted heater (WLE) without flow-
operated safety device, equipped with a fan in front
of the heat exchanger”.
The unit is a fully-automatic, directly-fired fan-assisted
air heater for wall and ceiling installation.
It can be fuelled with natural gas or liquid gas.
The unit is used for continuous and temporary
heating of open and closed spaces, e.g. in:
halls, workshops,
greenhouses,
storage rooms, etc.
Classification of the units
The units have been classified by the European
standardised regulations
EN 437, EN1196 and EN 1020 according to:
The gas category:
Determination according to the type of gases with
which they may be operated.
For Germany DE II2ELL3B/P
The gas type:
The burner can be operated with gases of the second
family (natural gas - group H and L) and with gases of
the third family (butane and propane).
The type of gas fireplace:
Differentiation according to the possibilities of the
discharge of the combustion products or the supply of
the combustion air.
(ambient-air-dependent/independent)
Additional notes can be found in the chapter
“Installation of the flue gas evacuation and the
combustion air supply”.
Design of the units
The exterior cladding of the units is made from coated
steel sheet, which guarantees durability.
The outlet grille is found in the front section.
In order to ensure an optimal distribution of warm air
in the installation location, the horizontal fins of the
outlet grille can be manually adjusted. On the rear
side of the unit you will find the fan(s) with protection
grid, the connection nozzles for the removal of
the flue gas and supply of the combustion air, the
gas connection nozzles, the cable passages for the
electrical lines as well as the plug connection for the
mains power supply connection. In the right-hand

7
Air/gas premix
The units are equipped with a burner with complete
air/gas premix.
This mixing process takes place in the fan of the
burner motor. The air drawn in by the fan flows
through the Ventura tube, where an underpressure
is created, which draws in the gas. In the process,
a constant air/gas mixture is created.
The ratio of air and gas pressure is 1:1.
This value can be changed through the offset
regulating screw found on the gas valve.
The amount of gas is already adjusted upon delivery
of the units and the screw is sealed.
With the adjusting screw located at the Venturi tube,
a fine adjustment can take place, which regulates
the maximum gas flow rate and thus determines the
carbon dioxide (CO2) content of the flue gases.
The screw is not sealed in order to enable conversion
of the fan-assisted air heater to another type of gas.
PLEASE NOTE:
For the offset and CO2adjustment.
The control board of the units enables the speed
regulation of the burner motor with DC depending on
the heat output required in the space.
By changing the speed the air flow rate and thus the
gas flow rate are changed.
Minimum and maximum speeds of the fan are two
values that cannot be changed.
Fans
The switching on of the fans is time-controlled by the
control board, whereby the timing begins with the
switching-on of the main burner.
The delayed switch-on prevents cold air from being
blown into the room.
Switching off the unit
If there is no longer a heat requirement (room
temperature above the adjusted setpoint), the control
board switches off the burner.
The burner fan runs for the secondary ventilation of
the combustion chamber for a fixed, pre-set time.
The fan(s) likewise run afterwards on a time-
controlled basis until the heat exchanger is cooled.
If a new heat requirement should take place during
the follow-up phase, the control board will wait for
the fans to switch off and then proceed with a reset
and begin a new cycle.
CAUTION
Before resetting safety equipment, the cause of
the trigger must be identified and rectified.
NOTE
Safety devices may not be bypassed or disabled
during operation of the unit!
IMPORTANT NOTE!
The interruption of the current supply during burning
operation or in the follow-up cooling phase is not
permitted, because lack of a secondary ventilation of
the heat exchanger can lead to significant damage:
■ Overheating of the unit with the resulting
expiration of the guarantee
■ Damage to the fan of the burner and its
components
■ Tripping of the safety thermostat and the
associated lock-out of the safety thermostat (STB).
Therefore no new unit start without manual
resetting
■ Damage to electrical lines

8
REMKO GPS series
Cycle of operation
The units from the GPS range are fully-automatic hot
air heaters, which are equipped with an electronic
device with self-testing and with a microprocessor
board for control and adjustment of the burner
output. This guarantees a high degree of reliability
and safety.
Burner operation
The burner is ignited when the following
preconditions are fulfilled:
■ The unit is supplied with power and is not in a fault
lock-out state (lock-out)
■ The gas supply valve is open
■ The contact between terminal ID2 and IDC2 on
the GPS board is closed
■ The thermostat contact between terminal ID2 and
IDC2 is closed
■ The On option in the Fun function menu of the
control panel is selected
Under these conditions, the burner fan starts
immediately. After the pre-flushing process is
complete, the flame is ignited with an ignition
output that is 50% of the maximum output. After
subsequently waiting for the stabilisation phase to
pass, the burner modulates to the required heating
output, depending on the inlet temperature.
If the flame cannot be ignited then 4 further ignition
attempts take place. With the fifth ignition attempt,
the GPS board triggers a fault shut-down. If the
burner ignites, the cooling fan starts up after 30
seconds and conveys the warm air into the room.
For the shut-down of the hot air generator, the
contact between terminals ID2 and IDC2 is to be
separated by an additional switch in addition to a
thermostat, the thermostat is to be switched off or
the OFF option in the function menu of the control
panel should be selected. It is prohibited to switch
off the unit by disconnecting the power supply. This
process must be used exclusively in emergencies.
With an instructed switch-off of the hot air heater,
the burner fan continues to operate for a further 90
seconds, in order to flush the burner chamber of flue
gases. The cooling fan runs on for 120 seconds after
the switch-off, to ensure that the heat exchanger
“cool down” takes place. If the cool down process
is not completed then this reduces the service life of
the heat exchanger and therefore also invalidates the
guarantee. Furthermore, the safety thermostat may
also be triggered and necessitate a manual reset.
If, during the cool down phase, a new heating request
is issued then the unit waits until the cooling fan has
switched off, performs a reset and then starts a new
heating cycle.
Efficiency
The advantages of the units lie in the modular mode
of operation, meaning the heat output created and
thus the gas flow (consumption of fuel) are changed
corresponding to the actual requirement. If there is
a reduced heat requirement in the heated space, the
hot air generator consumes less fuel, whereby its
efficiency is increased up to 97%.
Luft
Abgase
Gas
EV1EV2
EVP
HW080909
CAUTION
It is prohibited to switch off the unit power
supply as long as the unit is in the cool down
phase and the unit is set to “On”. Non-
compliance with this prohibition voids the
warranty and increases wear of the heat
exchanger.
Flue gases
Air
Gas

9
Intrinsic safety
The increase in efficiency with minimum output is
achieved through the use of a modern air/gas mixture
technology and the simultaneous flow rate regulation
of combustion air and gas.
This technology increases the safety of the unit,
because the gas valve feeds the fuel depending on the
amount of air in accordance with its factory settings.
Unlike atmospheric burners, the CO2content remains
the same through the entire operating range and
allows an increase in efficiency with reduction of the
heat output.
With no combustion air, the valve does not release
gas.
With reduction of the combustion air, the gas valve
automatically reduces the amount of gas and keeps
the combustion parameters at an optimal level.
Modulation
The gas wall heaters are units with modulated gas
burners, whereby every output between the minimum
and maximum settings are possible during operation.
The highest output serves for raising the room
temperature quickly when switching on the units.
If the room temperature approaches the desired
value, the unit begins to continuously reduce the heat
output so that only the actual requirement is covered.
The air is heated less heavily due to the lower heat
output, which limits the physical emergence of layer
formation (tendency of the warm to rise). This creates
temperature layering of approx. 0.5°C per metre.
These results can only be achieved through a precise
monitoring of the climactic spatial conditions and an
optimal control of the unit.
With the dimensioning of heating systems with fan-
assisted air heaters, it is important to observe the
number of hourly air renewals.
In this regard, please note the following: Gas wall
heaters should, in general, be arranged so that the
air flow rate ensures air recirculation at least twice
hourly, even if this would not be necessary for the
heat output.
Minimal pollutant emissions:
The premix burner provides for “clean” burning with
low pollutant emissions with the air/gas valve.

10
REMKO GPS series
Safety thermostat
The GPS unit series is equipped with a safety
thermostat with automatic reset function and positive
safety device as standard. This means that the safety
equipment also triggers with a breakage.
If the thermostat is tripped, the burner is stopped
via the flame monitoring unit and a subsequent fault
lock-out of the flame monitoring unit is triggered.
Fault lock-out is indicated on the LCD display with
F20. The thermostat probe is located behind the top
outflow fins, in the centre of the housing. Because
this is a safety-relevant error, the fault lock-out is
permanent and requires a manual reset.
Fin alignment
Before switching the unit on, open the fins at least
45°, in order to avoid overheating the combustion
chamber.
User manual
Enter key
ESC key
LCD display
Arrow keys
Equipment
The hot air heaters from the GPS series are fitted as
standard with a control panel on the front of the unit.
All unit information or fault indications are displayed
on this control panel or can be accessed from the
panel.
It should be noted, however, that the control panel is
not suitable for use as a remote control.
Room temperature control
The hot-air generators of the GPS series are delivered
without a remote control or room thermostat, as
various room thermostats available for the devices:
- For simple on/off switching:
Cabled remote control KF-35
- For easy regulation of the room temperature:
Room temperature control RR-35
- For optimal operation:
ATR Smart Basic or ATR Smart Web.
Operation with the ATR Smart Basic and with
the ATR Smart Web
The room temperature controllers ATR Smart Basic
and ATR Smart Web can be used for the control of an
individual temperature zone at constant temperature.
These have the following properties:
■ Control of up to 32 GPS units
■ TFT with colour screen with 4.3" with touch
display
■ Generously proportioned screen layout
■ Up to 3 additional external temperature sensorsfor
mixed temperature formation
■ Master switch for turning control on and off
supported
■ Monitoring of burner operation
■ Week and year calendar with daily programming to
the nearest minute
■ Comprehensive management of all plant functions,
including of the reset of individual units via
Ethernet interface and internet browser are possible
(only with ATR Smart Web)
In this regard, see the operating manual for the ATR
Smart Basic and ATR Smart Web "REMKO room
temperature ATR Smart Basic and ATR Smart Web"

11
In addition to the safety thermostat, there is the NTC-
1 probe which is set to the value ST1 and when the
setpoint is reached, the heat output of the burner is
adjusted downwards, regardless of other incoming
signals. The NTC1 probe controls the heat output.
The ST1 value should not be modified unless in
consultation with REMKO Customer Service.
Control panel
The LCD multifunction display installed as standard
at the front of the GPS units for the control,
configuration and diagnosis of all operating
parameters. The display consists of three segment
displays and four function keys: Up and down arrow
keys for scrolling in the menu, ENTER for confirming
and accessing a menu item and ESC to return the
previous menu level.
Customer Service can also edit the most important
operating parameters via the LCD display.
However, editing of the parameters is password
protected.
Display of the unit status
The unit status appears as follows in the display:
rdy Unit switched on without flame on burner,
is in standby to On or heat demand by the
control system of room temperature control;
On Unit switched on with flame on burner or in
the ignition phase;
OFF Unit switched off via the LCD display.
Any heat dissipation is not taken into account.
To turn the burner on, set the mode to On
using the LCD display;
Fxx Fault present.
During normal operation, the display shows On when
the burner is switched on. In the switch-off phase or
when room temperature is reached, rdy appears.
Air EST mode (ventilation) has been selected in
the Fun menu; set Fun to On or OFF;
Axx Address of the GPS hot air generator;
If the address of the hot air generator is not
zero, the current operating mode and the
address assigned to the hot air generator are
shown alternately on the display.
In the event of a connection problems between the
board and the CPU indicator flashes on the LCD
display if the problem is with the CPU; three flashing
dots indicate that the display board is the cause. In
this case, make sure that the display and board are
connected properly and that the cable RJ11 is firmly
seated in the plug.
CAUTION
Before resetting safety equipment, the cause of
the trigger must be identified and rectified.
NOTE
Safety devices may not be bypassed or disabled
during operation of the unit!
CAUTION
Before resetting safety equipment, the cause of
the trigger must be identified and rectified.
Connection of room thermostat and remote control
The hot air heaters from the GPS series must always
be connected to a thermostat, a timer or a room
temperature controller, so that the user can switch the
unit on and off. The operator or installer is required
to install the unit circuitry in the room. If multiple
switches for turning off the burner are present, these
must be connected in series.
Fault detection
The GPS board distinguishes between 30 different
locking modes and faults. This makes precise diagnosis
of the cause possible. The corresponding faults
numbers, cause and how to clear them are described
later in this guide.
For heavy lockouts requiring manual release, either
press and hold the two arrow keys on the LCD for
more than 5 seconds, or press the corresponding
button on the ATR Smart room temperature controller.

12
REMKO GPS series
First level menu
The following menus are available on the first level:
Unit status provides information on operation
(e.g. rdy, On, OFF);
Fun Under Fun the following operating modes can
be selected: On, OFF or EST (summer mode);
rEg With this menu, the burner can be induced
to minimum or maximum power during
combustion tests; after the pre-set time (10
minutes), it returns to automatic mode;
tin For reading out the value of the signal 0/10
Vdc (if present) at the hot air generator input;
Pra Not used;
Abi For password input to access the second and
third level menus.
By entering the password 001 gives write access to
the first level of the menus Set menu for setting the
setpoint, I/O for setting inputs and outputs, Par for
the parameters and FLt for faults.
Password input
On the home screen (On/OFF/rdy/Fxx) use the arrow
keys (up) and (down) to access the ABI function; hold
down the ENTER key for 3 seconds
Set the password in the ABI menu and confirm with
ENTER, hold down the key for approx. 3 seconds (the
display flashes to indicate that the parameter has been
saved);
Press the ESC key and return to the home screen (On/
OFF/rdy/Fxx) with the arrow keys and ENTER; hold
down ENTER for 3 seconds;
Use the arrow keys and ENTER to select the desired
menu line (Flt, I/O, SEt, Par);
Press ENTER to access the function;
Use the arrow keys and ENTER to select the
parameters to be displayed or modified;
Press ENTER to display the value of the parameter;
Use the arrow keys and ENTER to change the value
(SEt and Par only);
Press ENTER to confirm the change;
To quit the parameter and menu, press ESC until the
start screen (On/OFF/rdy/Fxx) appears.
Switch to be reset as before.
Scrolling through menu
The menu is divided into three levels, the first is
displayed without password input, the second and
the third require the input of a second and third level
password.
If the board of the GPS hot air generator is connected
to an ATR Smart Basic or ATR Smart Web, i.e. with
an address other than zero, the parameters are only
displayed and cannot be modified.
Changing parameters
The customer service, which must have access to all
menu items, proceeds as follows:
Isolate unit from power supply;
Set the board address to zero;
Reconnect the power supply;
After completion of the work, remember to reset the
switch for the address as before.
Use the arrow keys (up) and (down) to scroll through
the menu; to select a menu or parameter hold down
ENTER, press the arrow keys to modify the parameters
and press ENTER to confirm the change.
To quit a parameter or menu level, press the ESC key.
If a key has not been held down for 10 minutes, the
unit automatically switches back to the operating
mode.
To change a parameter, press the arrow keys; with
the up key, the parameter is increased by 1, and the
down key the parameter is decreased by 1, if both
arrow keys are pressed for at least three seconds, the
running speed of the parameters is increased.
To confirm the parameter change, hold down the
ENTER key for at least 3 seconds. The parameter
change is confirmed by the flashing of the display.
All submenus run from bottom to top, at the end of
the menu they start over again.

13
Menu of the second and third levels
The menus of the second and third level are
intended for technical customer service and are only
accessible by a password to be obtained from the
manufacturer's customer service. For further details,
see “Programming with LCD display”.
Fault directory
In the event of a lock-out (fault), the unit board
indicates the nature of the problem by means of a
code.
To unlock the hot air generator, hold down the
two arrow buttons on the LCD panel for at least 3
seconds, or actuate one of the remote controls, if
installed.
Faults are classified according to type of fault, the
most common faults, which can be directly remedied
by the user are:
F1x In case of failure of the burner to ignite,
manual unlocking necessary.
F20 Lock-out of the safety thermostat of the hot
air generator, manual unlocking necessary.
F21 No bridging between terminals ID1 and
IDC1 or tripping of the fire protection flap
connected to terminals ID2 and IDC2.
F3x Lock-outs due to faults in the exhaust gas fan.
F4x Fault lock-outs due to a fault or absence of
a temperature probe, intervention of the
customer service required.
F51 If the inlet temperature of the air has
exceeded the limit set with parameter TH1,
the temperature drops, the fault lockout
occurs automatically; No manual reset
required.
F60 Only on LCD panel, the hot air generator
is connected to an ATR Smart Basic or ATR
Smart Web, however there is no signal. When
the connection is re-established, the lock-out
is cancelled, manual unlocking is not required.
For the directory and explanation of all faults, see the
FAULT table in “Faults and fault analysis”.
Resets
The modulation board supports the detection of over
30 different lock-out causes. This means that the
causative event can be dealt with perfectly.
To reset a lock-out, press both arrow buttons
simultaneously for a couple of seconds.
The lock-out can be remotely cleared as follows:
Via the digital input ID4-IDC4 - N.O. key;
via the optional ATR Smart control;
Use of the ModBus protocol.
If there is no ignition, four further ignition attempts
are carried out by the flame monitoring board, and
lock-out and the display F10 do not take place until
after the fourth attempt.
The fault code and possible cause of the lock-out
are indicated in the FAULT table in “Fault and fault
analysis”.
If the flame monitoring device is locked out, faults
F10 and F20, the device can also be unlocked by
means of the button on the device itself; this lock-out
is also indicated by the LED on the device.
CAUTION: The flame monitoring device incrementally
saves the number of manual resets. In the event of
five resets within 15 minutes without detected flame
ignition, there is a “temporary” fault lock-out (F13).
In this case another 15 minutes are required, before
the unit can be reset again.
By pressing the reset button on the unit, this status
can be immediately reset.
NOTE: If the safety thermostat (STB) is “open” before
the start of the ignition phase, the flame monitoring
device remains in the “standby state” and displays the
fault F15 after 300 seconds.
This can occur, for example, in the cases of low
temperatures.

14
REMKO GPS series
Resets
The output of the GPS hot air generators can be
adjusted in three different ways:
- 0-10 Vdc;
- ModBus;
- NTC1 temperature probe.
For the correct setting of the control parameters,
the parameter d0 must be previously programmed;
this determines the regulation assigned to the hot air
generator
Operation with room temperature controller
The hot air generator operates fully automatically with
the aid of a room temperature controller, by means of
which the room temperature is adjusted.
The room temperature controller and the board
monitor all control and regulation functions, whereas
the flame monitoring unit and the safety thermostat
assume the safety functions.
Operation with the ATR Smart Basic / Web
Control of the hot air generator circuits of the can
be transferred to the ATR-Smart-Basic or Web. All
systems use the ModBus protocol and can control up
to 32 hot air generators.
To use the ATR Smart, Web or Basic for temperature
control, the parameter d0 with default setting 2 for
NTC1 control only has to be set to 7 (ModBus control)
on each unit.
The room temperature controllers of the “Smart”
series can be used for monitoring / display and control
(active part of the control).
The ATR Smart controller has an internal temperature
probe that can be connected to a remote control
probe for control. The ATR Smart Basic / Web have an
internal temperature probe and can be supplemented
by three additional remote control probes.
The remote probes can be programmed as a main or
additional element to the internal probe to obtain a
mean value between both measurements.
When an “ATR Smart Controller” panel, the following
is also required for control of the adjustment:
- Index unit modules from 1 to 32 by entering the
addresses of the individual modules via DIP switches;
- Connect at least one NTC probe to the ATR Smart
controller (or use an internal probe);
- Set the control parameters both on the board and
on the Smart.
The connectable NTC remote probes must be 10 k of
the 3435 type.
The probes must be connected to the NTC/NTC
terminals and can be placed in the room or at the air
intake, depending on the control requirement.
NOTE: The respective NTC probes are optional
external probes, not to be confused with the NTC1
modulation probe.
The ATR Smart Basic or Web is supplied with a
voltage of 12 Vdc (12 Vdc + 10%/-15%).
To activate the heating request, the input ID1 of
the ATR Smart controller must be closed. For the
ATR Smart Basic, these are terminals 5 and 6 of
the terminal block. For the ATR Smart Web, this is
terminal block M2, terminals 1 and 2. The contacts
are bridged as standard.
Parameter adjustment for flame modulation
Function Parameter System
Flame modulation
d0=2 NTC1
d0=5 0-10Vdc
d0=7 Modbus - H71

15
The ignition status of the burner, the percentage
modulation, the fault messages and the reset can be
displayed via the ATR Smart Basic / Web.
The ATR Smart Basic / Web require the following:
Indication of whether the probe is an external probe
(remote control), internal probe or both;
The number of connected devices (slave devices) must
be changed as required;
ON-OFF or PID control must be set;
The heating function (mode: “Heating”) and the
desired setpoint in the room or of the preheat must be
set;
The switch-on times must be set.
For further information on remote operation of the
controllers via ATR Smart Basic or Web, please refer to
the operating manuals.
The ATR Smart Basic or Web calculate the percentage
modulation via the PID control and transmit this value
to the individual modules. The percentage modulation
transmitted to the modules is always the same. If the
setpoint is exceeded, the generators are switched off.
The ATR Smart Web version supports the complete
management of all system functions, including the
reset of the devices directly via a PC.

16
REMKO GPS series
As a prerequisite for any guarantee claims to be
considered, it is essential that the ordering party
or their representative complete and return the
“Certificate of guarantee” to REMKO GmbH & Co.
KG at the time when the units are purchased and
commissioned.
The units have been tested several times in the
factory to verify their correct function. However,
if malfunctions should arise that cannot be
remedied by the operator with the assistance of the
troubleshooting section, please contact your specialist
dealer or contractual partner.
The units are designed exclusively for heating and
ventilation purposes in industrial or commercial use
(no living space heating) on the basis of their struc-
tural design and equipment.
The unit design allows for the use of the unit
accessories approved by the manufacturer.
The units must only be operated by appropriately
instructed personnel.
With non-observance of the manufacturer's specifica-
tions, the respective local legal requirements or after
arbitrary alterations to the units, the manufacturer
shall not be liable for resulting damages.
Any improper use of the units is prohibited.
The units must be installed by a qualified technician,
who is responsible for the observance of the existing
regulations, rules and guidelines.
Customer service and guarantee
Disposal of packaging
When disposing of packaging material, please
consider our environment.
Our units are carefully packed and delivered in stable
transport packaging and, if applicable, on a wooden
pallet.
The packaging materials are environmentally-friendly
and can be recycled.
By recycling packaging materials, you make a
valuable contribution to the reduction of waste and
conservation of raw materials.
Therefore, only dispose of packaging material at
appropriate collection points.
Disposal of the old unit
The manufacturing process for the units is subject to
continuous quality control.
Only high-grade materials are processed, the majority
of which are recyclable.
You also contribute to environmental protection by
ensuring that your old equipment is only disposed of
in an environment friendly manner.
Therefore, only bring the old unit to an authorised
recycling business or to an appropriate collection
point
.
Intended use Environmental protection
and recycling
NOTE
Operation that differs from that specified in this
operating manual is prohibited.
Failing to observe this renders any manufacturer
liability or guarantee claims void.
CAUTION
Copyright
The redistribution, even in part, or the use of
this documentation for purposes other than
intended is strictly prohibited without the written
authorisation of REMKO GmbH & Co. KG .
Transport and handling
The units from the GPS range are supplied fastened
to a wooden pallet and covered with suitable stable
cardboard packaging. Suitable transport vehicles,
capable of bearing the load, must be used to transport
the units. All transport work must be performed by
experienced personnel, who are familiar with the
applicable health and safety regulations. The unit
can be unpacked once it has been transported to the
installation site.

17
Ventilation openings
The rooms where gas-powered units are operated
must have one or more permanent openings
(windows or doors).
These openings must be arranged in the following
places:
- directly below the ceiling with gases with a density
less than 0.8
- directly above the floor with gases with a density
greater than or equal to 0.8.
The openings must be arranged on exterior walls in
open air. For the size of the cross-section, the installed
heat output is authoritative.
Installation instructions
The minimum height and clearance of the fan-assisted
heater from the walls and floor can be gathered from
the drawing below.
The minimum clearances are the necessary distances
for maintenance. All measurements are given in mm.
The height [2500 mm] corresponds to the minimum
height indicated for “Hanging units” by the
guidelines.
Two different types of brackets are available for the
installation as accessories:
Fixed and pivoting.
The following instructions for installation and set-up
of the units are intended exclusively for authorised
technicians.
All safety notes must be observed without exception.
General information
Normally the units can be installed directly in the
room to be heated.
With the installation of the units, the local and
country-specific regulations (LBO) and combustion
plant order (FeuVO) of the respective state must be
observed.
The first enactment of the (German) Federal
Emission Control Act (1st BlmSchG) and the
statutory provisions of the ordinance governing
small combustion plants (1st BlmSchV) must also be
applied.
The installation of fan-assisted heaters operated with
gas burners is prohibited in the following spaces:
■ In public function rooms or in rooms with a
concentration of persons greater than 0.4 per
square metre
■ In rooms where gas or dust can accumulate
through the processing that takes place there or
through the materials stored there, which could
lead to fire or explosion
200 1000
4002500
Installation
So that no dangerously high temperatures are
reached, the distance between the exterior surface
of the unit and flue gas pipe and any accumulated
flammable material must be no less than 1.5 m, with a
ground clearance of 2.5 m or greater.
Units with gas burners for gas with a thickness greater
than 0.8 (liquid gas, propane, butane) may only be
installed in rooms where the floor does not lie below
ground level.
NOTE
Ensure sufficient distance between fan and wall
(unhindered air flow)

18
REMKO GPS series
We reserve the right to modify the dimensions and design as part of the ongoing technical development process.
s s s
Permanent wall installation
Align the wall brackets in a suitable place on the wall
(spirit level) and fix securely.
Mark the boreholes to be made with a pencil.
- Securely attach the wall brackets with suitable
anchors and screws - M10 or greater.
- Install the two bracket pairs with the supplied
material as shown in the figure
- When installing the brackets, lock the nuts with a
locking ring between the bracket and nut.
Brackets for wall installation (standard design) EDP
no.: 228780 GPS 20 - 80
NOTE
Make sure that the type of anchor and size of the
screws are appropriate for the type of masonry, in
order to bear the weight of the unit.
- Position the unit on the brackets so that the holes of
the unit line up with those of the brackets, whereby
the corners of the brackets must be flush with the
front edge of the unit.
- Fasten the units with the M8 screws provided; in the
process, insert a locking ring between the screw and
bracket.
225225
560
90
Abstand B
ø12
Distance between the wall brackets
Model Distance B
GPS 20/30 719 mm
GPS 40/60 910 mm
GPS 80 1241 mm
CAUTION
The units may only be mounted on stable walls,
ceilings or structures made of non-flammable
construction materials with sufficient bearing
capacity.
The wall console must be affixed securely using
screws and wall plugs in accordance with the cus-
tomer’s type of wall and the unit weight.
The unit should be affixed “decoupled”.
Distance B

19
115
NOTE
The brackets must be connected to the unit and
the wall in a de-energised state.
CAUTION
The units may only be mounted on stable walls,
ceilings or structures made of non-flammable
construction materials with sufficient bearing
capacity.
The wall console must be affixed securely using
screws and wall plugs in accordance with the cus-
tomer’s type of wall and the unit weight.
Pivoting wall installation
The instructions for installation of the pivoting
brackets are included with the packaging.
The use of pivoting brackets is appropriate for the
following cases:
a) Installation of the unit in a corner
b) Installation of the unit at a right angle to the wall it
is mounted on
c) Installation of the unit on a column
The unit should be
affixed “decoupled”.
The spider must be
mounted
with the flush
socket side below the
unit’s base.
A counterplate must be
used if necessary.
The bracket must be
screwed to the wall so
that it is free of tension.
After the unit has been
aligned finally, use the
enclosed threaded pin
to secure the spider.
220
8080
Ø12 The fastening holes are
the same for all bracket
sizes.
The order numbers for the pivoting wall installation
are:
EDP no.: 228781 for GPS 20/30
EDP no.: 228782 for GPS 40/60
EDP no.: 228783 for GPS 80

20
REMKO GPS series
Suspension from the ceiling
The accessory assembly kit ceiling suspension, with
4 universal suspension brackets, is available for
installation as a suspended unit.
When fastening to the ceiling with chains or ropes
provided by the customer, use appropriate fastening
materials that are appropriate for the weight of the
unit.
Vertical air flow
If installation with a vertical air flow is intended,
this should be specified during the order phase. An
additional thermostat is installed on the fan for this.
Detailed view A:
Horizontal air flow
A
Detailed view B:
Vertical air flow
B
NOTE:
Small guide holes are provided for correct
arrangement of the suspension brackets. These
must be aligned at the top edge of the unit. Refer
to corresponding figure here. With a vertical unit
installation (only possible with the GPS series), a fan
thermostat must be additionally installed.
CAUTION
Installation as a suspended unit with vertical air
flow can lead to damage and the failure of the
unit without the fan thermostat.