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Heronhill - for all your Nordmann requirements
Operating instructions
NORDMANN
Steam humidifiers of the RC/DC 3000 series
● Installation
●
Connecting the water and the electrics
● Putting into operation
● Servicing and system signals
● Spare parts
● Technical specifications
ENGINEERING
NORDMANN
ENGINEERING
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www.heronhill.co.uk
Fax: 01823 665807
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Introduction
You have purchased a NORDMANN steam humidifier which, provided
you observe the operating instructions, will ensure fully automatic operation
and reliable, low-maintenance service. Therefore, read these operating
instructions carefully and pay particular attention to the safety instructions
and warnings.
Should you have any queries that go beyond the scope of these operating
instructions, please contact the company from which you purchased the
humidifier. As the manufacturers, we are, of course, always ready to be of
assistance, since we want all of our customers to be completely satisfied
with our products.
List of contents
1. Installation
1.1
1.2
1.3
1.4
1.5
1.6
2. Water connections
2.1 Quality of the water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Water intake and drainage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3. Electrical connections
3.1
3.2
3.3
3.4
3.5
Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Mounting the on/off humidistat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Terminals and cable cross-sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Proportional adaptor (option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4. Putting into operation
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
How the humidifier works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
The steam cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Putting the humidifier into operation . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Automatic operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Setting the output limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Indications of the two-colour LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
System and servicing indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Remote indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Safety functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5. Servicing and maintenance
5.1
5.2
5.3
5.4
5.5
5.6
Cleaning and replacing the steam cylinder . . . . . . . . . . . . . . . . . . . . . . 18
Drainage strainer in the steam cylinder . . . . . . . . . . . . . . . . . . . . . . . . . 19
Removing the electronic controls unit . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Removing the steam blower (RC 3000) . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Taking the humidifier out of operation . . . . . . . . . . . . . . . . . . . . . . . . . 20
Regular servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6. Rectifying faults
6.1 The humidifier produces insufficient or no steam . . . . . . . . . . . . . . . . . 21
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Steam distribution nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Fitting the humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Fitting the steam distribution pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Laying the steam hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Laying the condensate hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7. Spare parts list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8. List of options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
9. Technical specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
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Safety instructions
Please read and observe the operating instructions before fitting
and putting into operation.
Very important!
The operating instructions should always be readily available and kept in
the immediate vicinity of the humidifier.
All work must be done only by persons who are familiar with the product
and are sufficiently qualified to perform the work.
The RC/DC 3000 steam humidifiers have been designed and constructed in
accordance with the latest technology and the accepted safety regulations.
However, if misused, the humidifier can present a danger to both the user
and third parties.
Apart from these safety instructions, you should observe all national and
local regulations.
Proper use
The RC/DC 3000 steam humidifiers are intended solely for indirect
humidification (via a steam distribution nozzle or a steam-distribution pipe
in a ventilation duct) or for direct room humidification. Used in
any other way, or in a way that goes above and beyond the one described
above, is contrary to its intended usage. The manufacturer/supplier
cannot be held responsible for any damage resulting therefrom. The user
shall bear the risk.
Alterations to the humidifier
Without NORDMANN’s written approval, no alterations may be made to
the humidifier itself, the components or the accessories.
The use of non-original spare parts may lead to our refusal to accept
responsibility for any damage arising therefrom.
Safety instructions
Whenever you see either
of these signs,
particular care must be taken.
!
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1. Installation
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1.1 Dimensions
Dimensions of the RC/DC 3000 units
Type
Fig.
mm
mm
mm
A
B
C
Steam outlet
Drainage
Empty weight
Full weight
kg
kg
RC 222
1
590
250
195
-
1 x Ø 22
9.5
12
RC 322
1
650
250
195
-
1 x Ø 22
9.5
13
DC 222
1
590
250
195
1 x Ø 22
1 x Ø 22
9
11.5
DC 322
1
650
250
195
1 x Ø 22
1 x Ø 22
9
12.5
Fixing holes for types 222 – 322
Type
B
(mm)
285
285
A
B
A
222
322
A
(mm)
145
145
B
Fig. 1
Dimension of the steam distribution pipes
(A steam distribution nozzle will be standard
supplied with the pack version of DC 3000,
see 1.2)
Fig. 2
Type/mm
A
B
C
D
Fig.
Art. no.
22–300
300
Ø 22
176
60
3
902 00 00
22–450
450
Ø 22
300
70
3
902 00 01
22–650
650
Ø 22
504
70
3
902 00 02
22–850
850
Ø 22
696
70
3
902 00 03
A
D
B
C
10
0x
10
0
C
138
116
105
3%
ø8
116
Fig. 3
4
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1.2 Steam distribution nozzle
For the steam outputs 2 and 3 kg/h, we offer a steam distribution nozzle
(Pack version) which can be fitted either in air ducts, for instance, or used
for direct room humidification. The rules of the humidification distance
(distance needed to mix the steam adequately with air) must be observed
here, too.
When the steam nozzle is employed, the length of the steam hose
should not exceed 1.5 metres.
26
80
Ø 65
Ø 22/29
48
Ø 6/10
Fig. 4
1.3 Fitting the humidifier
All installation work must be performed by trained personnel.
The customer himself is responsible for verifying their qualifications.
When fitting the humidifier, use only the material supplied with
the unit and observe the various minimum distances that have been
stipulated.
To open the humidifier, turn the knurled screw located on top
of the unit in an anti-clockwise direction, then lower the door.
To close the unit, shut the door and tighten the screw.
!
A
C
Positioning the humidifier
Type
mm mm mm
A B C
RC 3000 280 380 40
B
DC 3000 320 280 40
A
B
Type
C
C
Fig. 5
mm mm mm
A
B
C
RC 3000 min. ca. min.
1200 2000 280
Ensure that there is sufficient
room to perform servicing and
maintenance work, and that
the unit is easily accessible.
To facilitate such work, mount
the unit at eye level.
We recommend that you
fit the humidifier as near as
possible to the steam
distribution pipe or to the
steam distribution nozzle. The
highest degree of efficiency is
attained when the humidifier
is linked to the steam
distribution pipe/nozzle by the
shortest possible steam hose.
Fig. 6
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1.4 Fitting the steam distribution pipe (DC 3000)
All installation work must be performed by trained personnel.
The customer himself is responsible for verifying their qualifications.
!
The visible jet of steam issuing from the steam distribution pipe dissipates
in the air only after a certain distance. In order to prevent condensation,
a certain minimum distance to other parts of the installation (such as fans,
filters or pipe bends) must, therefore, be maintained.
The steam distribution pipes can be fitted either vertically or horizontally,
though you must ensure that the steam outlets are always vertical
to the air flow. If fitted horizontally, these apertures must be at the top.
An adhesive template is supplied with each steam distribution pipe
to facilitate installation in, for instance, an air duct. NORDMANN’s steam
distribution pipes are designed so that, if fitted straight, there is
automatically a slight decline of 3% which ensures that any condensate
flows back again.
1/3
2/3
Guidelines on fitting the steam distribution pipes:
min 300
Fig. 7
B
A
Various fitting methods:
=
=
Fig. 8
A
A = min. 200
Fig. 9
A = min. 250
B = min. 150
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B
A
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Fig. 10
A = min. 175
B = min. 100
Steam distribution pipe fitted on suction side:
Pressure compensation hose
Because of the subpressure in the appliance or duct part, condensate
may be trapped in the steam distribution pipe. If there is an outlet in
the empty part (intended for the distribution pipes) of the humidifier,
the condensate can be bled off in the immediate vicinity. An alternative
method of bleeding off the condensate can be seen in the diagram.
Tight-fitting
rubber bung
Stench trap type:
Sperrfix 3
Fig. 11
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1.5 Laying the steam hose (DC 3000)
The steam hose should be kept as short as possible. It should
not be possible to block or obstruct the steam supply lines in any way.
Furthermore, they must be protected from outside interference
(e.g. deformities, kinking etc.).
After the hose has been laid, it is advisable to re-check everything when
the hose is warm.
It is equally important to avoid condensation pockets in the hose.
Any curve should have as large a radius as possible.
Installation material
If a hose is used for the steam line, it must be the original one supplied by
NORDMANN. If other hoses are utilized, NORDMANN cannot be held
responsible for any damage that may occur.
A hose clamp should be used to link the hose to the steam distribution
pipe.
When laying the steam hose in pipes, cable ducts etc., you must verify
their resistance to high temperature (min. 100°C). All insulation material
must also be checked for its resistance to high temperature.
If the steam line installed is of copper, small radii should be avoided
wherever possible. Every bend causes an additional resistance. A steam line
of copper must have the same diameter as the hose.
min 5%
min. 300
min. 300
150
min. 300
If the steam lines are long with a lot of bends and a relatively high internal
duct pressure, water may be continuously forced out of the steam cylinder,
which impairs performance.
min 20%
Fig. 12
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1.6 Laying the condensate hose (DC 3000)
It is advisable to mount the condensate hose as vertical as possible
and to feed the condensate either directly into an open funnel
or below the siphon.
If the steam distribution pipe is fitted above the humidifier, the
condensate can be fed back to the unit by placing the end of the hose in
the filling cup. In this instance, a small siphon should be formed with
the condensate hose.
If the condensate is drained off directly, it is advisable to feed back
the condensate hose separately. The end of the condensate hose should
be in the open air. If the end of the hose is submerged in water, the
condensate is prevented from draining away.
Condensate
fed back
to the unit
Condensate
drained off
separately
Fig. 13
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2. Water connections
2.1 Quality of the water
NORDMANN humidifiers use ordinary tap water for the production
of pure steam. The electrical conductivity should be between 125 and 1250
microsiemens per cm.
The hardness of water is measured in accordance with the international
unit millimol, calcium and magnesium ions per litre (mmol/l), previously
the degree of German hardness (DH):
Soft water:
Fairly hard water:
Hard water:
Very hard water:
up to 1.3 mmol/l up to 7° DH
1.3 to 2.5 mmol/l to 7-14° DH
2.5 to 3.8 mmol/l 14-21° DH
over 3.8 mmol/l over 21° DH
Other international units:
1° DH = 1.78° (French hardness)
1° DH = 1.25° (English hardness)
1° DH = 1.05° (American hardness)
1° DH = 10 mg/l CaO
1° DH = 17.9 mg/l CaCo3 (ppm)
NORDMANN’s electrode steam humidifiers allow you to use water ranging
from soft to very hard, without the need for prior treatment.
2.2 Water intake and drainage
!
All installation work must be performed by trained personnel.
The customer himself is responsible for verifying their qualifications.
Please observe local regulations concerning the connection of appliances
to the pressure and drainage systems.
The humidifiers are designed to operate on ordinary tap water. If you
intend using treated or de-mineralized water, consult your NORDMANN
representative beforehand.
Connecting to the cold-water supply, with stop cock
Where the water pressure is between 1 and 10 bar (0.1 to 1 MPa),
the unit can be connected directly to the water supply. If it is over 10 bar
(1 MPa), connection must be via a pressure reduction valve
(set to 4–6 bar), = 0.4–0.6 MPa).
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In any case, the water feed pipes that you have laid
must be flushed thoroughly before connecting them
to the humidifier. You should use copper piping only.
Note that the drainage facility should provide the
possibility of performing cleaning and maintenance.
The drainage pipe should have a decline to the
drainage system of at least 5%.
A fine filter should be fitted at the water intake
to the humidifier; this prevents the rapid build-up of
impediments in the inlet filter of the inlet valve.
3/4”
Tap (supplied
by customer)
Drainage cup
3/8”
Fine filter
(supplied by
customer)
Fig. 14
3. Electrical connections
3.1 Safety instructions
!
All work pertaining to the electrical installation must be carried out
by qualified personnel only. The customer is responsible for verifying
the qualifications of the technicians concerned.
Before performing any electrical work, all power to the humidifier must be
disconnected.
Please observe local regulations concerning electrical installations.
The installation must be fitted with a device which disconnects the unit
(with a contact opening of at least 3 mm) on all phases from the mains
power supply.
NORDMANN humidifiers are designed to be connected to the earth
lead and are categorized as belonging to Protection class 1 for electrical
equipment.
The connection details are provided in the wiring diagrams for each
type of unit. Each unit is supplied with the appropriate wiring diagram.
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External fuses per phase (A):
Type
222 322
Voltage
200 V
10
16
220 V
10
16
230 V
10
16
240 V
10
16
3.2 Voltage
The standard voltage of 220–240 V must be applied to terminals L1 and N.
N.B.: When performing cleaning and maintenance work on the unit,
all power to the humidifier, including the control voltage, must be
disconnected.
3.3 Mounting the on/off humidistat (RC 3000 pack only)
The on/off room humidistat is already connected ex works (RC 3000
pack) to the unit (length of cable 1.5 m). The wall mounting can be
effected with the delivered installation material. Please pay attention
to the recommended mounting distances as shown in Fig. 15.
0.4 m
1.5 m
min.
Fig. 15
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3.4 Terminals and cable cross-sections
Type of
humidifier
Terminals
mm2
Cross-section of
heating wires mm2
Cross-section of
control cable mm2
Screw terminals for
heating voltage
222
4
2,5
0,75
PG 11
322
4
2,5
0,75
PG 11
3.5 Proportional adaptor (option)
The proportional adaptor can be either factory-fitted or fitted subsequently
by the customer simply by inserting it onto the electronics unit.
The following control signals from humidity controllers can be processed:
0-2 V
0-5 V
0-10 V
0-16 V
0-20 V (SCS) 1-5 V
2-10 V
0-20 mA
4-20 mA
Potentiometer min. 135 Ohm
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4. Putting into operation
4.1 How the humidifier works
NORDMANN humidifiers use ordinary tap water to produce steam.
The water is converted directly into steam in a steam cylinder by
electrode heating using electrical energy. In so doing, the water acts as
the electrical resistance. Vaporization occurs at atmospheric pressure
(non-pressurized).
S = maximum-level sensor
E = electrode
Hydrodynamic
filling cup
S
E
E
Fig. 16
The electronic control system, with its highly-integrated microcontroller,
regulates the vaporization process in accordance with a new principle
developed by NORDMANN which allows rapid output changes to be made.
The humidifier adapts itself fully automatically to the quality of the
water used. Due to this ability to set the optimum water concentration in
the steam cylinder, the smallest of adjustments to the water level can
effect a change in the steam output. Therefore, the unit reacts quickly and
accurately to any setpoint changes. Because of its ultimate degree
of efficiency, this new type of control system ensures perfect drainage,
i.e. the process of water deconcentration in the cylinder.
The use of fuzzy logic technology improves the controllability.
The microcontroller of the RC/DC 3000 series works with fuzzy-logic
algorithms. This regulates the conductivity or mineral concentration in the
steam cylinder and achieves ideal operating conditions while, at the
same time, maximizing the operational reliability. Furthermore, the output
fluctuations which occur during normal operation are kept to a
manageable minimum by the automatic water-intake and drainage
functions.
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4.2 The steam cylinder
A regular check of the steam cylinder ensures trouble-free operation.
If the humidifier displays the message U1 (LED flashing green), it can
still be run for a few days before the steam cylinder needs to be replaced.
We recommend that you keep a spare cylinder in stock for each unit.
NORDMANN’s steam cylinders are so economical that it is usually cheaper
to replace the cylinder rather than to clean it. To clean the cylinder,
it should first be emptied by pressing the black button for manual drainage
(located on the pcb inside the housing) and then removed (see Fig. 17).
After the drainage filter has been taken out, the cylinder can be flushed
with tap water (using no chemical substances).
4.3 Putting the humidifier into operation
After the steam hose, water feed pipe, drainage pipes and electrical cables
have all been correctly connected, the RC/DC 3000 humidifier can be
switched on using the black power switch. As soon as the humidistat or
humidity controller demands humidification, the LED lights up green,
the contactor is activated and, soon after, water is fed into the steam
cylinder, whereupon fully automatic operation commences.
Of course, the humidifier will operate automatically only if (a) it was
installed by a specialist and (b) the shut-off valve in the water feed pipe is
open.
After the water in the steam cylinder has been heated up, the production
of steam begins.
During the start-up phase, or after a new replacement cylinder has been
fitted, the maximum water level, or Niveau max. can be attained.
When Niveau max. has been reached, the inlet valve closes briefly; this is
a normal occurrence during the steam cylinder’s concentration
phase. The length of this phase can differ; it lasts until the cylinder has
reached the nominal rating. When the Niveau max. is attained,
it will be indicated by a red flash in the green colour of the LED.
4.4 Automatic operation
The RC/DC 3000 series’ special electronic controls unit with microcontroller
regulates all operations automatically, so that the user does not need to
take any action or make any settings during normal running.
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4.5 Setting the output Iimitation
The RC/DC 3000 series enables an adaptation of the steam output.
The steam output can be adjusted continuously between 25% and 100%
capacity. For setting the output limitation, you must open the front
door, rotate the pcb support plate (Fig. 18) and turn the potentiometer
on the electronic pcb. Turning clockwise increases the steam output
and turning anti-clockwise reduces the steam output. All humidifiers are
set ex-works to 100% output.
Potentiometer
Coding switches
Switch
”manual
drainage”
Fig. 17
4.6 Indications of the two-colour LED
The newly-developed electronic controls unit with microcontroller
continuously monitors the operations of the RC/DC 3000 series. Each
operation status and all system messages are shown with the two-colour
LED. The status of the LED can be shining continuously or flashing in
the red or green colours. The combination of these different possibilities
permits the indication of all messages.
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4.7 System and servicing indications
Operation
LED shining green continuously
The humidistat or humidity controller demands humidification. The RC/DC
3000 humidifier operates automatically. Without demand of humidity
the LED remains dark.
Niveau max. attained
Red flash in the shining green of the LED
Occurs when the Niveau max. sensor has been attained.
Manual drainage open
LED flashing red-green-red-green
When the manual drainage is activated by pressing the black button
on the electronic pcb.
Code U1: Servicing signal
LED flashing green
The steam cylinder can no longer attain the nominal output and needs,
therefore, to be cleaned or perhaps replaced. A visual inspection of the
inside of the cylinder is necessary to be able to decide whether it needs
replacing. Code U1 is purely a servicing code; the unit does not switch off
automatically. The humidifier continues to function at a reduced output.
Acknowledgement is effected by switching the unit off and on with the
black power switch.
Code U2: Excess current
LED shining red continuously
Whenever there is excess current (140% of the nominal value) during
normal operations, the humidifier switches itself off automatically
for safety reasons. After the fault has been rectified, the humidifier is put
back into operation by switching the unit off and on with the black
power switch.
Code U3: Humidifier fills continuously
LED flashing red
Either there is no heating phase or no water in the cylinder due to
the water supply having been cut off. The humidifier switches itself off
automatically after 30 minutes and is put back into operation by
switching the unit off and on with the black power switch.
Code U4: Microcontroller uncoded
LED flashing red-red-green-green
This signal appears if a replacement electronic controls unit has been fitted
to the humidifier without being coded. The humidifier is prevented from
operating. The signal disappears as soon as the electronic controls unit has
been coded.
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4.8 Remote indication
The standard, potential-free relay output enables the collective alarm
messages to be displayed remotely.
4.9 Safety functions
NORDMANN humidifiers are protected against running dry, i.e. the power
is cut off automatically as soon as the electrodes in the steam cylinder
protrude above the water level.
If current consumption becomes excessive (25% above the normal level),
the outlet valve is opened automatically. Because the electrodes
are then in contact with less water, current consumption falls back to
the nominal value.
If current consumption fails to fall below 140% of the nominal level
even after several drainage operations, the humidifier soon turns itself off
automatically, and the message U2 appears on the two-colour LED.
5. Servicing and maintenance
5.1 Cleaning and replacing the steam cylinder
!
Before commencing, switch off all power to the humidifier and
disconnect the unit from the mains.
The serviceable life of the steam cylinder depends on both the hours run
and the hardness of the water used.
The cylinder should be replaced when the electrodes have become
insulated so much (because of calcification) that the required steam
output cannot be reached. At the same time, the water level in the
cylinder continuously touches the maximum level sensor. In this case, the
specially constructed water filling cup offers additional protection by
feeding excess water directly into the overflow facility, allowing it simply
to drain away.
Whenever message U1 (LED flashing green) appears, you should proceed
as described on page 19. However, the humidifier can still be run for some
time before you need to replace the steam cylinder.
18
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Procedure for replacing the steam cylinder/manual drain
●
Open the drainage valve by pressing the manual drainage switch
(round black button on pcb inside the housing, see Fig. 17). The used
cylinder will be drained entirely. Let the cylinder cool down.
●
Before proceeding further, disconnect the unit from the mains.
●
Loosen the clamp on the steam hose, pull off the hose and remove the
electrical plug from the cylinder; the cylinder itself can now be removed.
●
To fit the new unit, reverse the above procedure. It is advisable
to wet slightly either the O-ring seal on the drainage valve body or the
outside of the cylinder’s drainage aperture, since this makes it easier
to fit the new cylinder.
The humidifier is re-started in accordance with the recommendations
detailed in the chapter entitled ”Putting the humidifier into operation”.
5.2 Drainage strainer in the steam cylinder
!
All NORDMANN steam cylinders are fitted with a removable drainage
strainer which can be extracted easily for cleaning.
The cylinder can then be put back into place and the humidifier put back
into operation.
19
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5.3 Removing the electronic controls unit
All work pertaining to the electrical installation must be carried out
by qualified personnel only. The customer is responsible for verifying
the qualifications of the technicians concerned.
!
Before removing the electronics unit, all power to the humidifier must be
switched off.
b)
a)
c)
4x
a) Remove the screw on the right side of the housing
b) Rotate the pcb holder plate
c) Remove the 4 screws
The electronics unit of the RC/DC 3000 comprises a processor pcb
and a LED pcb. All pcbs have screwed connections, which facilitates their
replacement.
Fig. 18
5.4 Removing the steam blower (RC 3000)
By removing 4 screws – 2 on the left side of the housing wall and 2 on
the rear wall – the holder plate with front part, blower and switch can be
removed. Remove the 4 nuts at the rear of the support plate. Take the
blower off. Disconnect the blower cables from the electronic pcb.
5.5 Taking the humidifier out of operation
!
Should you wish to take the humidifier out of operation for a long
period of time (e.g. in summer or when the air-conditioning system is not
operated), the steam cylinder must be emptied.
Before proceeding, switch off all power to the humidifier.
5.6 Regular servicing
!
Regular servicing helps to maintain the operability and reliability of the
humidifier.
All work must be carried out by qualified personnel only. The customer
is responsible for verifying the qualifications of the technicians
concerned.
Before commencing work, all power to the humidifier must be
switched off.
The following checks should be carried out on a regular basis:
●
Inspect and clean the steam cylinder.
If there are any deposits in the steam cylinder, you should remove
the drainage strainer and flush the cylinder thoroughly with tap water
(using no chemical substances). If the electrodes are worn, it is time
to replace the steam cylinder.
20
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●
Inspect the steam, condensate and water hoses.
Check that they are still correctly laid and that the hose clamps are still
tight. Check that the hoses are still in good condition.
●
Inspect and clean the inlet and outlet valves.
If worn, or covered in scale deposits, replace the valves.
●
Check the drainage cup and, if necessary, clean or replace it.
6. Rectifying faults
6.1 The humidifier produces insufficient
or no steam
When a fault occurs, the problem is often sought only on the humidifier,
though the fault may have been caused by a problem in the plant.
For successful trouble-shooting, some knowledge of plant technology
(air-conditioning, controls etc.) is necessary.
You should proceed in the following order:
Observe
Work out the problem
● Take action
●
●
The following causes are possible:
The steam cylinder is new and merely in the start-up phase
The humidistat/humidity controller is not demanding any humidity
● A safety element, such as a maximum humidistat etc., is not allowing
humidification to take place
● The safety link between terminals L1 and H has not been made
(when a proportional adaptor is used)
● The heating power is off or the electrode plugs have not been inserted
● There is no water in the steam cylinder because the water supply has
been interrupted (e.g. stop cock is closed etc.)
● The filter or the nozzle in the inlet valve is blocked or damaged
● An output limitation has been set
● The cylinder needs replacing
● The humidifier is too small for the job
● The current transformer is defective
● The contactor coil is defective
● The steam hose is blocked or has a kink in it
●
●
21
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7. Spare parts list
Detailed drawings of spare parts with their article number are available
from both your NORDMANN representative and the manufacturer.
8. List of options
All options can be fitted either at the factory or subsequently.
Proportional adaptor
Allows the steam output of the RC/DC 3000 humidifiers to be set
anywhere between 20 and 100%. The proportional adaptor can be simply
inserted onto the electronic controls unit.
Step adaptor
Allows the steam output to be regulated in 2, 3, or 4 stages. The adaptor is
simply inserted onto the electronic controls unit.
22
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9. Technical specifications
RC 3000
DC 3000
222
Type mark:
Type
222
Voltage*
Volt
230 V 230 V 230 V 230 V
Number of phases
322
322
1
1
1
1
Nominal current
A
6.5
9.6
6.5
9.6
Steam output:
kg/h
2
3
2
3
Capacity range
kg/h
0.5-2
0.75-3 0.5-2
0.75-3
Nominal power
kW
1.5
2.2
1.5
2.2
qty
1
1
1
1
222
422
222
422
width mm 250
250
250
250
height mm 590
650
590
650
depth mm 195
195
195
195
Construction data:
Steam cylinder
Type of cylinder
Dimensions
Weight (empty)
kg
9.5
9.5
9
9
Operating weight
kg
12
13
11.5
12.5
Air flow
m3/h
57
57
–
–
Noise level at 1 meter
dB (A)
36
36
–
–
Fan (RC 3000 only):
Accessories:
RC 3000
DC 3000
Type
222
322
222
322
qty
1
1
1
1
Proportional adaptor
qty
1
1
1
1
Step adaptor
qty
1
1
1
1
Humidity controller
Control adaptors:
Steam distribution pipes or nozzle for duct use:
22-300 mm, 22-450 mm
qty
–
–
1
1
Steam distribution nozzle qty
–
–
1
1
qty x m
–
–
1
1
qty x m
–
–
1
1
22-650 mm, 22-850 mm
Steam hose:
Ø 22/29 mm
Condensate hose:
Ø 6/10 mm
* Standard 200–240 V.
23
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Nordmann Engineering AG
Hofackerstrasse 55
CH-4132 Muttenz/Switzerland
Tel. +41-61-467 76 66
Fax +41-61-467 76 77
NORDMANN
321-0100-E
ENGINEERING
24
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