REMKO DZH Series User manual

Operating and
installation instructions
Read the instructions prior to performing any task!
REMKO DZH series
DZH 20-2, DZH 30-2, DZH 50-2, DZH 90-2
Oil heating unit
0301-2021-10 Edition 1, en_GB

Translation of the original
Read these operating instructions carefully before commis-
sioning / using this device!
These instructions are an integral part of the system and must
always be kept near or on the device.
Subject to modifications; No liability accepted for errors or mis-
prints!

Table of contents
1 Safety and usage instructions............................................................................................................. 4
1.1 General safety notes....................................................................................................................... 4
1.2 Identification of notes...................................................................................................................... 4
1.3 Personnel qualifications.................................................................................................................. 4
1.4 Dangers of failure to observe the safety notes................................................................................ 4
1.5 Safety-conscious working............................................................................................................... 4
1.6 Safety instructions for the operator................................................................................................. 5
1.7 Safety notes for installation, maintenance and inspection.............................................................. 5
1.8 Unauthorised modification and changes......................................................................................... 5
1.9 Intended use................................................................................................................................... 5
1.10 Warranty........................................................................................................................................ 5
1.11 Transport and packaging............................................................................................................... 6
1.12 Environmental protection and recycling........................................................................................ 6
2 Technical data........................................................................................................................................ 7
3Unit description..................................................................................................................................... 8
4 Installation instructions........................................................................................................................ 9
5 Electrical wiring diagram.................................................................................................................... 10
6 Commissioning the unit..................................................................................................................... 11
7 Shutdown............................................................................................................................................. 13
8 Troubleshooting and customer service............................................................................................ 14
9 Care and maintenance........................................................................................................................ 17
9.1 General......................................................................................................................................... 17
9.2 Maintenance protocol.................................................................................................................... 19
10 View of the unit and spare parts........................................................................................................ 20
10.1 View of the unit DZH 20-2........................................................................................................... 20
10.2 Spare parts list DZH 20-2............................................................................................................ 21
10.3 View of the unit DZH 30-2 / DZH 50-2........................................................................................ 22
10.4 Spare parts list DZH 30-2 / DZH 50-2......................................................................................... 23
10.5 View of the unit DZH 90-2........................................................................................................... 25
10.6 Spare parts list DZH 90-2............................................................................................................ 26
11 Index..................................................................................................................................................... 27
3

1 Safety and
usage instructions
1.1 General safety notes
Carefully read the operating manual before com-
missioning the units for the first time. It contains
useful tips and notes such as hazard warnings to
prevent personal injury and material damage.
Failure to follow the directions in this manual not
only presents a danger to people, the environment
and the system itself, but will void any claims for
liability.
Keep this operating manual and the refrigerant
data sheet near to the units.
1.2 Identification of notes
This section provides an overview of all important
safety aspects for proper protection of people and
safe and fault-free operation.The instructions and
safety notes contained within this manual must be
observed in order to prevent accidents, personal
injury and material damage.
Notes attached directly to the units must be
observed in their entirety and be kept in a fully
legible condition.
Safety notes in this manual are indicated by sym-
bols. Safety notes are introduced with signal words
which help to highlight the magnitude of the danger
in question.
DANGER!
Contact with live parts poses an immediate
danger of death due to electric shock. Damage
to the insulation or individual components may
pose a danger of death.
DANGER!
This combination of symbol and signal word
warns of a situation in which there is immediate
danger, which if not avoided may be fatal or
cause serious injury.
WARNING!
This combination of symbol and signal word
warns of a potentially hazardous situation,
which if not avoided may be fatal or cause
serious injury.
CAUTION!
This combination of symbol and signal word
warns of a potentially hazardous situation,
which if not avoided may cause injury or mate-
rial and environmental damage.
NOTICE!
This combination of symbol and signal word
warns of a potentially hazardous situation,
which if not avoided may cause material and
environmental damage.
This symbol highlights useful tips and recom-
mendations as well as information for efficient
and fault-free operation.
1.3 Personnel qualifications
Personnel responsible for commissioning, opera-
tion, maintenance, inspection and installation must
be able to demonstrate that they hold a qualifica-
tion which proves their ability to undertake the
work.
1.4 Dangers of failure to observe
the safety notes
Failure to observe the safety notes may pose a risk
to people, the environment and the units. Failure to
observe the safety notes may void any claims for
damages.
In particular, failure to observe the safety notes
may pose the following risks:
nThe failure of important unit functions.
nThe failure of prescribed methods of mainte-
nance and repair.
nDanger to people on account of electrical and
mechanical effects.
1.5 Safety-conscious working
The safety notes contained in this manual, the
existing national regulations concerning accident
prevention as well as any internal company
working, operating and safety regulations must be
observed.
REMKO DZH series
4

1.6 Safety instructions
for the operator
The operational safety of the units and compo-
nents is only assured providing they are used as
intended and in a fully assembled state.
nThe units and components may only be set up,
installed and maintained by qualified per-
sonnel.
nProtective covers (grills) over moving parts
must not be removed from units that are in
operation.
nDo not operate units or components with
obvious defects or signs of damage.
nContact with equipment parts or components
can lead to burns or injury.
nThe units and components must not be
exposed to any mechanical load, extreme
levels of humidity or extreme temperatures.
nAll housing parts and device openings, e.g. air
inlets and outlets, must be free from foreign
objects.
nThe units must be inspected by a service tech-
nician to ensure that they are safe to use and
fully functional at least once annually. Visual
inspections and cleaning may be performed by
the operator when the units are disconnected
from the mains.
1.7 Safety notes for installation,
maintenance and inspection
nAppropriate hazard prevention measures must
be taken to prevent risks to people when per-
forming installation, repair, maintenance or
cleaning work on the units.
nThe setup, connection and operation of the
units and its components must be undertaken
in accordance with the usage and operating
conditions stipulated in this manual and comply
with all applicable regional regulations.
nRegional regulations and laws as well as the
Water Ecology Act must be observed.
nThe units must be installed and operated in
such a way that personnel are not endangered
by exhaust gases, hot air and radiant heat and
no fires may occur
nThe units must then only be operated in areas
where the units can be supplied with an ade-
quate amount of air for the combustion
nIf the units are being operated without exhaust
gas routing then they may only be operated in
well ventilated areas. Under such circum-
stances it is forbidden for personnel to remain
in these areas for extended periods. Appro-
priate prohibition signs should be put up at the
entrances
nA safety zone of 1.5 m should be maintained
around the units - incl. non-combustible items
nThe power supply should be adapted to the
requirements of the units.
nMobile units must be set up securely on suit-
able non-combustible surfaces.
nThe equipment and components should not be
operated in areas where there is a heightened
risk of damage. Observe the minimum clear-
ances.
nThe units and components must be kept at an
adequate distance from flammable, explosive,
combustible, abrasive and dirty areas.
nThe units must not be exposed to direct jets of
water, e.g. pressure washers etc.
nPortable fuel containers must only be set up
and used in observance of the technical rules
for combustible liquids "TRbF 20".
nSafety devices may not be modified or
bypassed.
1.8 Unauthorised modification
and changes
Modifications or changes to units and components
are not permitted and may cause malfunctions.
Safety devices may not be modified or bypassed.
Original replacement parts and accessories
authorised by the manufactured ensure safety. The
use of other parts may invalidate liability for
resulting consequences.
1.9 Intended use
The units are designed exclusively for heating and
ventilation purposes in industrial or commercial use
(no living space heating in private use) on the
basis of their structural design and equipment. The
units must only be operated by appropriately
instructed personnel.
Any different or additional use is a non-intended
use. The manufacturer/supplier assumes no lia-
bility for damages arising from a non-intended use.
The user bears the sole risk in such cases.
Intended use also includes working in accordance
with the operating and installation instructions and
complying with the maintenance requirements.
The threshold values specified in the technical
data must not be exceeded.
1.10 Warranty
For warranty claims to be considered, it is essential
that the ordering party or its representative com-
plete and return the "certificate of warranty" to
REMKO GmbH & Co. KG at the time when
the units are purchased and commissioned.
5

The warranty conditions are detailed in the "Gen-
eral business and delivery conditions". Further-
more, only the parties to a contract can conclude
special agreements beyond these conditions. In
this case, contact your contractual partner in the
first instance.
1.11 Transport and packaging
The devices are supplied in a sturdy shipping con-
tainer. Please check the equipment immediately
upon delivery and note any damage or missing
parts on the delivery and inform the shipper and
your contractual partner. For later complaints can
not be guaranteed.
WARNING!
Plastic films and bags etc. are dangerous
toys for children!
Why:
- Leave packaging material are not around.
- Packaging material may not be accessible to
children!
1.12 Environmental protection
and recycling
Disposal of packaging
All products are packed for transport in environ-
mentally friendly materials. Make a valuable contri-
bution to reducing waste and sustaining raw mate-
rials. Only dispose of packaging at approved
collection points.
Disposal of equipment and components
Only recyclable materials are used in the manufac-
ture of the devices and components. Help protect
the environment by ensuring that the devices or
components (for example batteries) are not dis-
posed in household waste, but only in accordance
with local regulations and in an environmentally
safe manner, e.g. using certified firms and recy-
cling specialists or at collection points.
REMKO DZH series
6

2 Technical data
Unit data
Unit type DZH 20-2 DZH 30-2 DZH 50-2 DZH 90-2
Nominal thermal load kW 20 36 46 95
Air volume m3/h 350 605 1400 2500
Fuel Heating oil EL per DIN 51603 or diesel fuel
Max. fuel consumption l/h 2.01 3.62 4.62 9.52
Danfoss oil nozzle 1) USG 0.40/80°S 0.60/80°S 0.85/80°S 2.0/80°W
Pump pressure, approx. 1) bar 11-12 13-14 13-14 10-11
Tank capacity l 17 40 62 105
Power supply V/Ph/
Hz 230/1~/50
Max. rated current A 1.0 1.3 1.8 2.5
Max. power consumption kW 200 290 430 520
Electrical protection (provided by the cus-
tomer)
A 10
Sound pressure level, LpA 1m 2) dB(A) 74 77 78 79
Total length mm 800 1050 1090 1400
Total width mm 300 500 500 655
Total height mm 520 615 740 890
Weight kg 21 37 43 84
EDP no.: 116202 116302 116502 116902
1) The specified nozzle sizes and pump pressures are based on test bench results.
The oil flow rate was derived from this.
Based on the product-specific nozzle and pressure tolerances as well as the oil temperature, the specifica-
tions should only be considered guidelines.
2) Noise measurement in acc. with DIN 45635 - 01 KL 3.
7

3 Unit description
The units are mobile air heaters (WLE), without an
exhaust gas connection.
The units can be directly fired with EL heating oil
and are designed exclusively for commercial use.
The units are equipped with fuel tanks mounted
beneath the unit, fuel filters, low-maintenance axial
fans, high-pressure atomisation burner with optical
flame monitoring, a room thermostat socket and
power cable with protective contact plug.
The units conform to the fundamental health and
safety requirements of the appropriate EU regula-
tions, and are simple to operate.
Use
The units may be used among other things for the
following:
nSpot heating of outdoor workplaces
nSpot heating workplaces in open, non-flam-
mable manufacturing facilities and halls
nTemporarily heating enclosed spaces with a
sufficient fresh air supply
nDe-icing machines, vehicles and non-combus-
tible warehoused goods
nMaintaining the temperature of frost-sensitive
parts
CAUTION!
The units must only be installed in well venti-
lated spaces and not in living areas or similar
recreational areas.
Operating sequence
The supply air fan switches on once the units are
switched on or if heat is required (fully automatic
unit operation with room thermostat). The solenoid
valve opens the fuel supply to the oil nozzle fol-
lowing burner pre-ventilation.
The fuel atomised under high pressure is enriched
with a quantity of air (oxygen) appropriate to the
heating capacity and ignited by an electrical spark.
As soon as a flawless flame has been generated,
the automatic burner begins optical flame moni-
toring. Warm air is blown out after a short period of
time.
The automatic burner executes all unit functions
fully automatically and ensures reliable monitoring.
In the event of malfunctions or an unstable or
extinguished flame, or even in the event of over-
temperatures, the automatic burner switches the
units off. The automatic burner’s fault lamp will
light up in this case. The units can only be
restarted after manually resetting the automatic
burner.
After switching off the units via the operating switch
or the room thermostat, the supply air fan runs to
cool the combustion chamber for a certain time
and then switches off automatically.
Depending on the heat requirement, the operating
sequence described is repeated fully automatically
when in thermostat mode.
REMKO DZH series
8

4 Installation instructions
The safety regulations of the accident prevention
and insurance associations, the respective
regional building regulations and the combustion
appliances regulations apply to the operation of the
units.
For example, for Germany:
nCombustion plant order (FeuVo) for the indi-
vidual state
nWorkplace directives ASR 5
nWorkplace regulations §§ 5 and 14
Outdoor installation
nThe operation of the units must not present a
hazard or unreasonable loading
nThe unit operator must ensure that it is not
possible for unauthorised persons to be able to
manipulate either the unit or the power supply
nTo prevent damage due to inclement weather,
units installed outdoors must be protected
accordingly
Installation in enclosed, well-ventilated rooms
nThe units are designed without an exhaust gas
connection according to type, and can only be
used in enclosed rooms on a conditional basis
nIn order to exclude impermissible contamina-
tion of the room air with hazardous substances,
reliable extraction of the combustion gases
must always be guaranteed
nThe fresh air supply required for trouble-free
combustion must also be guaranteed. It is
practical to have the fresh air supply provided
by windows and doors or through appropriately
dimensioned openings in the outside wall
nThe units may only be operated for room
heating with a room thermostat (accessory)
The units may only be operated in rooms if:
na sufficient quantity of air is supplied to the unit
for the combustion
nthese are well ventilated and aerated
nthe proportion of substances harmful to health
in the breathing air is at a harmless level
NOTICE!
Overpressure and underpressure in the installa-
tion area should be avoided as this will inevi-
tably lead to combustion-related malfunctions.
9

5 Electrical wiring diagram
ZT
C
ZE
M
~
STB MV
FZ
BS
1 3 57
1
2
3
4
5
6
7
8
1
2
1
2
3
4
5
1
2
3
7
6
5
4
3
2
1
RS
1
2
3
1
2
3
H
RT
FA
F
J4 J3
J1 X2
J2
2 4 68
Fig. 1: Electrical wiring diagram
BS: Operating switch
C: Capacitor
F: Fuse
FA: Terminal block
FZ: Photocell
H: Operating lamp
J1-J4: Terminal blocks
M: Motor
MV: Solenoid valve
RS: Relay socket
RT: Thermostat receptacle
STB: Safety thermal cut-out
X2: Terminal block
ZE: Ignition electrode
ZT: Ignition transformer
We reserve the right to modify the dimensions and design as part of the ongoing technical development
process.
REMKO DZH series
10

6 Commissioning the unit
The units should be checked for visible defects on
the operating and safety devices as well as proper
installation and correct electrical connections
before commissioning.
A person, who has been adequately trained in the
handling of the units, must be tasked with opera-
tion and monitoring of the units.
NOTICE!
In the event of defects that endanger the opera-
tional safety of the units, operation of the units
must be discontinued immediately and the
supervisor informed!
Connecting the units to the electrical power
supply
1. Move the operating switch to the "0" (off)
position.
2. Plug the unit's power plug into a properly
installed and fused mains socket (230V/
50Hz).
The electrical connection for the units must be
made at a separate feedpoint with a residual
current device in accordance with VDE 0100,
Section 55.
CAUTION!
All cable extensions must only be used in fully
un-reeled or reeled off condition.
Heating without room thermostat
The units are operating in permanent operating
mode.
1. Connect the strapping plug supplied [2] with
the thermostat receptacle [1] on the unit.
2
1
2. Move the operating switch to the "I" (on)
position.
Safety distances
nIn order to guarantee safe operation of the
units, a 1 m safety distance must be main-
tained around the unit
nObserve a minimum clearance of 3 m from the
unit outlet
nFlooring and ceilings must be fire retardant
nIntake and outlet diameters must not be nar-
rowed or blocked with foreign objects
WARNING!
The units may not be installed or operated in
potentially flammable or explosive environ-
ments.
If the units overheat, a safety shutdown takes
place via the automatic burner.
11

Paraffin formation with low outside tempera-
tures
Even at low temperatures, an adequate supply of
flowing heating oil must be ensured.
NOTICE!
Paraffin formation can start at temperatures
below 5°C. To avoid this, appropriate precau-
tionary measures must be implemented.
A tank heater is available as an optional
REMKO accessory.
nThe fuel tank must be filled with clean heating
oil or diesel fuel
Do not use biodiesel!
nClean and suitable tanks may be used for filling
The fuel filter must be checked for dirt or paraffin
formation before the unit is started and after every
filling of the tank.
The fuel filter is directly opposite the tank filler
necks.
The fuel tank may only be filled with the tank filter
inserted into the filler necks.
NOTICE!
Only fill clean fuel via a funnel with a fine filter.
Notes for unit safety shutdown
The fuel supply of the units is in the 1-pipe system
as standard. In this regard, the fuel supply to the
nozzle can be interrupted by air bubbles during ini-
tial commissioning or after the fuel tank has been
completely emptied.
The automatic burner performs a fault shutdown in
this case.
The fault shutdown is displayed by the red indi-
cator light of the automatic burner on the control
panel.
The automatic burner is unlocked by pressing the
malfunction button.
The automatic burner can be unlocked after a
waiting time of approx. 60 sec.
If the unit has still not started after several
attempts, please read the section “Trouble-
shooting”.
The fill quantity of the fuel tank must be checked.
NOTICE!
Always ensure that an adequate fill level is
maintained in the fuel tank. Approx. 5-10 litres
of fuel is required.
REMKO DZH series
12

Heating with room thermostat (accessory)
The units operate fully automatically and in accord-
ance with the room temperature.
1. Pull out the strapping plug.
2. Connect the room thermostat [4] plug [3] with
the thermostat receptacle [1] on the unit.
3
1
3. Place the room thermostat [4] at a suitable
location in the room. The thermostat probe
must not be located directly in the warm air
flow and must not be placed directly on the
cold floor.
4. Set the desired temperature on the room
thermostat [4].
4
5. Move the operating switch to the "II" (Auto)
position.
If heat is required, the units now switch on auto-
matically, or when room temperature is reached.
7 Shutdown
1. Move the operating switch to the "0" (off)
position.
2. With longer periods of inactivity, disconnect
the units from the mains power supply.
The supply air fan runs to cool the combustion
chamber and switches off independently. The
fan can switch on and run several times before
the final stop!
NOTICE!
Never interrupt the mains connection prior to
the completion of the follow-up cooling phase.
There is no warranty claim for damage to the
units from overheating.
In the case of longer periods of inactivity or if
the units are in storage, always clean the fuel
tank and fill it with heating oil or diesel.
13

8 Troubleshooting and customer service
The unit and components are manufactured using state-of-the-art production methods and tested several
times to verify that they function correctly. However, if malfunctions do occur, please check the functions as
detailed in the list below. For systems with an indoor unit and outdoor unit, refer to the chapter "Trouble-
shooting and customer service" in both operating manuals. Please inform your dealer if the unit is still not
working correctly after all function checks have been performed!
Malfunction table
Malfunction Possible causes Remedial measures
The supply air fan does
not start.
The unit has no power supply. Check the power plug, mains socket
and mains voltage.
No plug in the thermostat socket. Connect the thermostat/strapping plug
with the thermostat socket.
The room thermostat is set too low. Set the room thermostat higher than
the current room temperature.
Malfunction of the automatic burners. Replace the automatic burner.
The fan motor is overloaded. (The fan
runs irregularly or is blocked)
Allow fan motor to cool. Check the
smooth running of the fuel pump.
Check the electrical and mechanical
functioning of the motor.
The fuel pump is blocked. Check fuel pump and replace if neces-
sary.
Operating switch malfunction. Check operating switch and replace if
necessary.
The supply air fan runs
but the burner does not
ignite.
Air in fuel system during start-up. Press the fault key of the automatic
burner. Repeat if necessary (max. 3
times).
The fault lamp in the automatic burner
lights up.
Reset the automatic burner by pressing
the malfunction button.
Malfunction of the automatic burners. Replace the automatic burner.
The fuel tank is empty. Fill the fuel tank with clean EL heating
oil or diesel.
The fuel filter is contaminated. Replace the fuel filter.
The oil nozzle is blocked or of the
wrong size.
Replace the nozzle (ensure it is the cor-
rect type and size!).
The electrodes are incorrectly set, the
insulation has cracked.
Readjust the ignition electrodes and
replace if necessary.
The air slide of the burner head has
moved or is contaminated.
Readjust using CO2 indicator and soot
pump. (CO2 approx. 11 - 12%, soot
level in acc. with Bacharach 0 – 1).
REMKO DZH series
14

Malfunction table (continued)
Malfunction Possible causes Remedial measures
The supply air fan does
not start.
(continued)
The solenoid valve does not open. Check the solenoid valve and replace if
necessary.
The pump pressure is improperly set. Adjust the pump pressure using a suit-
able pressure gauge.
The pump coupling is faulty. Replace the pump coupling.
Leak in the intake line or fuel filter. Check and seal or replace faulty parts.
The unit malfunctions
without generating a
flame.
Shutdown by safety thermal cut-out
(STB).
Check protective intake grille and clean
if necessary and unlock the automatic
burners again.
Air bubbles in fuel system. Start the unit to discharge the air
through the nozzle. Repeat this proce-
dure up to 3 times if necessary.
The photocell is contaminated or faulty. Clean photocell and replace if neces-
sary.
Paraffin precipitation in the heating oil. Clean the entire burner system. See
also chapter "Commissioning".
The unit switches off
during operation.
(The fault lamp in the
automatic burner lights
up)
The room thermostat is set too low. Set the room thermostat higher than
the current room temperature.
The fault lamp in the automatic burner
lights up.
Reset the automatic burner by pressing
the malfunction button.
Malfunction of the automatic burners. Replace the automatic burner.
The fan motor is overloaded. (The fan
runs irregularly or is blocked)
Allow fan motor to cool. Check the
smooth running of the fuel pump.
Check the electrical and mechanical
functioning of the motor.
The fuel pump is blocked. Check fuel pump and replace if neces-
sary.
The fuel tank is empty. Fill the fuel tank with clean EL heating
oil or diesel.
The fuel filter is contaminated. Replace the fuel filter.
The oil nozzle is blocked or of the
wrong size.
Replace the nozzle (ensure it is the cor-
rect type and size!).
The air slide of the burner head has
moved or is contaminated.
Readjust using CO2 indicator and soot
pump. (CO2 approx. 11 - 12%, soot
level in acc. with Bacharach 0 – 1).
The pump pressure is improperly set. Adjust the pump pressure using a suit-
able pressure gauge.
The pump coupling is faulty. Replace the pump coupling.
15

Malfunction table (continued)
Malfunction Possible causes Remedial measures
The unit switches off
during operation.
(The fault lamp in the
automatic burner lights
up)
(continued)
Leak in the intake line or fuel filter. Check and seal or replace faulty parts.
The protection grid on the supply air fan
is contaminated.
Clean the protection grid.
Shutdown by safety thermal cut-out
(STB).
Check protective intake grille and clean
if necessary and unlock the automatic
burners again.
Air bubbles in fuel system. Start the unit to discharge the air
through the nozzle. Repeat this proce-
dure up to 3 times if necessary.
Insufficient ventilation. Open door or window.
The photocell is contaminated or faulty. Clean photocell and replace if neces-
sary.
Paraffin precipitation in the heating oil. Clean the entire burner system. See
also chapter "Commissioning".
Smoke formation
during operation.
The fan motor is overloaded. (The fan
runs irregularly or is blocked)
Allow fan motor to cool. Check the
smooth running of the fuel pump.
Check the electrical and mechanical
functioning of the motor.
The fuel filter is contaminated. Replace the fuel filter.
The oil nozzle is blocked or of the
wrong size.
Replace the nozzle (ensure it is the cor-
rect type and size!).
The air slide of the burner head has
moved or is contaminated.
Readjust using CO2 indicator and soot
pump. (CO2 approx. 11 - 12%, soot
level in acc. with Bacharach 0 – 1).
The pump pressure is improperly set. Adjust the pump pressure using a suit-
able pressure gauge.
Leak in the intake line or fuel filter. Check and seal or replace faulty parts.
The protection grid on the supply air fan
is contaminated.
Clean the protection grid.
Air bubbles in fuel system. Start the unit to discharge the air
through the nozzle. Repeat this proce-
dure up to 3 times if necessary.
Insufficient ventilation. Open door or window.
The unit does not
switch off in operating
switch position "0".
The solenoid valve does not close. Disconnect the fuel line at the main
filter (the flame extinguishes).
Operating switch malfunction. Check operating switch and replace if
necessary.
REMKO DZH series
16

9 Care and maintenance
9.1 General
Regular care and observation of some basic points
will ensure trouble-free operation and a long
service life.
The complete units, including combustion chamber
and burner, must be cleared of soot deposits, dust
and dirt after every heating period or according to
the operating conditions.
DANGER!
Before undertaking any work on the units, the
mains plug must be removed from the mains
socket.
CAUTION!
There is an acute risk of injury from automatic
fan switch-on, when the unit enclosure is
opened!
NOTICE!
Adjustment and maintenance work may only be
carried out by authorised qualified technicians.
nKeep the units free of dust and other debris
nOnly clean the units with a dry or moistened
cloth
nNever subject to direct jets of water. e.g. pres-
sure washers etc.
nNever use abrasive or solvent-based cleaners
nEven with heavy contamination, use only suit-
able cleaners
nClean the fuel tank regularly and then rinse
with clean fuel or another suitable agent. Do
not use water!
nAlways keep the burner pipe, baffle plate, pho-
tocell etc. clean
nCheck the wear parts such as oil nozzle, seals
etc. and replace if necessary. We recommend
replacing the oil nozzle in any case before the
start of the heating season!
nClean the tank filter in the filler neck of the fuel
tank regularly
nDepending on its condition, the fuel filter must
be replaced before each heating season. Note
the direction of flow!
nOnly use clean EL heating oil or diesel fuel.
Watch for paraffin formation!
nAlways entrust authorised specialist personnel
with replacing the oil nozzle and cleaning or
replacing the gauze filter in the fuel pump (only
with DZH 90-2)
nCheck that all safety devices are operating cor-
rectly at regular intervals
nIn the event of diminishing heat capacity,
smoke formation and/or poor ignition, carry out
a proper unit inspection with burner setting
nObserve the regular maintenance and care
intervals
NOTICE!
An electrical safety check must be carried out in
accordance with VDE 0701 after any work on
the unit.
17

Setting values of the ignition electrodes and air
slide
2-3
7
7
Fig. 2: Setting the ignition electrodes (information
approx. values in mm)
12
B
Fig. 3: Setting the air slide
1: Burner pipe
2: Air slide
Dimension “B”
Unit Dimension “B”, reference
values in mm
DZH 20-2 20
DZH 30-2 12
DZH 50-2 20
DZH 90-2 13
NOTICE!
The exhaust gas must be checked and adjusted
by authorised specialist personnel. The flame
must burn out within the combustion chamber.
No flames may escape outside of the combus-
tion chamber.
NOTICE!
Adjustment and maintenance work may only be
carried out by authorised qualified technicians.
REMKO DZH series
18

9.2 Maintenance protocol
Unit type:
--------------------------------
Unit number:
---------------------------------------
0
1
0
2
0
3
0
4
0
5
0
6
0
7
0
8
0
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
Unit cleaned - outside -
Unit cleaned - inside -
Fan blade cleaned
Combustion chamber cleaned
Burner head cleaned
Ignition electrodes adjusted
Oil nozzle replaced
Burner set and calibrated
Safety equipment checked
Safety devices checked
Unit checked for damage
Electrical safety check
Test run
Comments: ...................................................................................................................................................
.............................................................................................................................................................................
01. Date: .............
...............................
Signature
02. Date: .............
...............................
Signature
03. Date: .............
...............................
Signature
04. Date: .............
...............................
Signature
05. Date: .............
...............................
Signature
06. Date: ............
...............................
Signature
07. Date: .............
...............................
Signature
08. Date: .............
...............................
Signature
09. Date: .............
...............................
Signature
10. Date: .............
...............................
Signature
11. Date: ............
...............................
Signature
12. Date: .............
...............................
Signature
13. Date: .............
...............................
Signature
14. Date: .............
...............................
Signature
15. Date: .............
...............................
Signature
16. Date: ............
...............................
Signature
17. Date: .............
...............................
Signature
18. Date: .............
...............................
Signature
19. Date: .............
...............................
Signature
20. Date: .............
...............................
Signature
*) Have the forced-air burner maintained and adjusted only by authorised specialist personnel and in accord-
ance with the legal provisions (1st BImSchV.). A corresponding measurement log should be generated.
Unit to be maintained only by authorised specialist personnel in accordance with the statutory regu-
lations.
19

10 View of the unit and spare parts
10.1 View of the unit DZH 20-2
24
40 41
42
44 45
48 B
43
32
33
31
38
39
35
74
46
52
55
60
62
01
70 71 72
07
08
77
10
76
12
15
16
21
22
20
25
24
27
29 30
29
30
26
A
46
61
28
34
84
35
10
75
73
19 17
87
11
90 91
89
88
97
82 96
53
93
94 95
Fig. 4: Exploded view
We reserve the right to modify the dimensions and design as part of the ongoing technical development
process.
REMKO DZH series
20