DST RECUSORB RZ-104R User manual
Dehumidier
RECUSORB RZ-104R
SPECIAL:
Energy saving step 2; 0-10VDC signal from external regulator
The product picture may differ from the actual product
INSTRUCTION MANUAL
Document version: EN.08 11.05
Product: RZ-104Rsp
Order: 110 231
3
1. Safety .................................................5
1.1 Aim of this Documentation ....................... 5
1.2 Accentuations in the text ......................... 5
1.3 Inspection of goods ................................. 5
1.4 Safety ...................................................... 5
1.4.1 General advice ............................... 5
1.4.2 Intended use ................................... 5
1.4.3 Safety advice regarding transporta-
tion ................................................. 5
1.4.4 Safety advice - Mechanical ............ 5
1.4.5 Safety advice - Electrical ................ 6
1.4.6 Unit related safety advice ............... 6
1.4.7 Hazardous operating conditions ..... 7
1.4.8 Responsibilities of the operator ...... 7
1.4.9 Minimising hazards ......................... 7
2. General Description .........................8
2.1 Applications ............................................. 8
2.2 Construction ............................................ 8
2.3 Principle of operation ............................... 8
3. Design ................................................9
3.1 Housing and dismantling ......................... 9
3.2 Rotor ........................................................ 9
4. Components and features .............10
4.1 Standard conguration .......................... 10
4.1.1 Rotor motor .................................. 10
4.1.2 Filters ........................................... 10
4.1.3 Fans ............................................ 10
4.1.4 Heater and heater control ............. 10
4.1.5 Electric box design ....................... 10
4.1.6 Overheat protection and control ther-
mostat .......................................... 10
4.1.7 Pressure nozzles .......................... 10
4.2 Special congurations (Options) ................. 11
4.2.1 Filter guards ................................. 11
4.2.2 Humidistat control ......................... 11
4.2.3 Electronic controllers .................... 11
4.2.4 Automatic restart .......................... 11
4.2.5 Emergency stop ........................... 11
4.2.6 Rotation guard .............................. 11
4.2.7 Energy saving ............................... 11
4.2.8 Linear & binary control ................. 12
4.2.9 Adjustable rotor speed ................. 12
4.2.10 Frequency converter .................. 12
5. Installation .......................................13
5.1 Duct-work .............................................. 13
5.2 Electrical connection .............................. 13
5.3 Humidistat connections ......................... 13
5.4 Remote connection ................................ 13
5.5 Steam or hot water regeneration ........... 13
5.6 Positioning ............................................. 14
6. Operating .........................................15
6.1 Keys ....................................................... 15
6.2 Start ....................................................... 16
6.3 Stop ....................................................... 16
6.4 Run time - Heaters ................................ 16
6.5 Run time - Process fan .......................... 16
6.6 Adjusting TH2 &TH3 setpoint ................ 16
6.7 Reset buttons & switches ...................... 17
6.8 Reset the PLC & restart unit .................. 17
6.9 Conguration check ............................... 17
6.10 Remote operation ................................ 18
6.11 Start-up procedure ............................... 18
6.12 Shut down procedure .......................... 18
6.13 PLC operation messages .................... 18
7. Starting up .......................................19
7.1 Pre-operation Checks ............................ 19
7.2 Start-up .................................................. 19
7.3 Responsibilities of the operator ............. 19
8. Troubleshooting .............................20
8.1 PLC-error codes .................................... 20
8.2 Capacity troubleshooting ....................... 21
8.3 Capacity Test ......................................... 21
9. Maintenance ....................................22
Contents
See next page for appendix list and gure list
4
Appendix
1. Component list
2. Dimensions
3. Specication: TTC25X
4. Speccation: Step controller SS-S4/D
5. Energy saving (option)
6. EC Declaration of conformity
Electric wiring diagram is located inside the electric
box (The electric diagram has a drawing number.
This number should correspond to the same drawing
number found inside the electric cabinet).
Figures
FIGURE 1: Principle of Operation..............................................8
FIGURE 2: Rotor matrix .............................................................9
FIGURE 3: Principle function of the rotor .................................9
FIGURE 4: Principle of design ...................................................9
FIGURE 6: Standard process and regeneration fan* ..............10
FIGURE 7: Electric regeneration *Heater*...............................10
FIGURE 5: Rotor motor* ..........................................................10
FIGURE 8: Inside electric cabinet............................................10
FIGURE 10: Pressure nozzles.................................................10
FIGURE 9: TH1 .......................................................................10
FIGURE 11: Differential U-tube manometers ..........................11
FIGURE 12: Electronic lter guard ..........................................11
FIGURE 13: Humidistat 1 & 2 illustration.................................11
FIGURE 14: Binary and linearly control ...................................12
FIGURE 15: Installation ...........................................................13
FIGURE 16: Locating bracket ..................................................14
FIGURE 17: Dehumidier leg ..................................................14
FIGURE 29: PLC alarm table and solution ..............................20
FIGURE 30: Troubleshooting and solution table .....................21
FIGURE 31: Correction diagram..............................................23
5
1 Safety
1.1 Aim of this Documentation
This document is included at delivery and is therefore
an integral part of the equipment. It describes the
machine’s design and conguration at the time of
delivery.
In the interest of safety, please study this documentation
before installing or operating the equipment.
Instructions relating to safety, handling, operation and
maintenance are to be followed.
Non-compliance can result in serious personal injury
or damage to the machinery and may invalidate
manufacturers’ liabilities and warranties.
This documentation includes guidance for:
• Installers
• Operators
• Maintenance staff
Please retain this documentation throughout the
lifetime of the equipment.
1.2 Accentuations in the text
Attention! This is advice on safety!
Identies potential hazards that may cause
injury to personnel.
Actions which must be taken to reduce risk of
injury are marked like this.
Additional useful information is labelled like this.
1.3 Inspection of goods
The equipment was factory tested and inspected
before delivery.
Attention! Check for transportation damage!
Continue the use of this product only if you
assess it as being undamaged and faultless.
Any damage must be recorded by the forwarder
at time of delivery and reported to the supplier
of the equipment at the earliest opportunity.
Please check condition of the equipment
carefully for damage upon receipt and after
removal of all packaging.
1.4 Safety
1.4.1 General advice
This equipment conforms to the appropriate European
regulations and directives and is designed and
manufactured to be safe and reliable in operation.
Continued safety and reliability is entirely dependent
on correct handling, installation, operation and
maintenance of the equipment supplied.
1.4.2 Intended use
This equipment is specically designed for atmospheric
air drying. It is unsuitable for any other use. For further
advice please contact your DST representative.
Unless specically stated in this manual, the
following applications are prohibited:
• Conditioning of gases (other than air).
• Conditioning of air contaminated with chemicals
or aggressive elements.
• Conditioning of air containing ammable or
explosive elements.
• On rooms or air systems having a potentially
explosive atmosphere (Ex-Zones).
• Conditioning of air at elevated pressures.
• Unltered air (minimum lter standards required
are G4).
1.4.3 Safety advice regarding
transportation
Attention! Heavy equipment being dropped!
Only use tested and certied lifting equipment
to off-load and position the unit.
If a fork lift is used to move the unit, please
ensure the load is evenly balanced.
If lifting the unit on a pallet, ensure the unit is
rmly secured to the pallet.
Evacuate and secure the danger area during
lifting and positioning of the unit.
1.4.4 Safety advice - Mechanical
Attention! Mechanical hazards!
Installation, testing, commissioning preventative
and corrective maintenance must be carried
out by a qualied person or under supervision
of a qualied person. Wherever possible, all
mechanical work must be carried out with the
electric supply switched off.
A qualied person (mechanical) is dened in this
manual as:
• A mechanical technician or engineer qualied
to service and maintain air conditioning plant
and associated systems.
• Has completed the appropriate health and
safety training.
• Has read and is familiar with the contents of
this manual.
• Is professionally competent to commission and
service this type of equipment.
6
For your own safety, wear the appropriate
personal protective equipment (PPE).
1.4.5 Safety advice - Electrical
Attention! This equipment will contain high
voltage electrical components!
Wherever possible, all electrical work must be
carried out with the electric supply switched
off. It is recommended that electrical isolators
are locked in the off position. All electrical work
must be carried out by a qualied person or
under supervision of a qualied person.
A qualied person (electrical) is dened in this manual
as:
• An electrical technician or engineer qualied
to service and maintain air conditioning plant.
• Has completed the appropriate health and
safety training.
• Has read and is familiar with the contents of
this manual.
For your own safety, wear the appropriate
personal protective equipment (PPE).
Attention! If the unit control panel isolation
switch is off, the incoming cable terminals may
still be live!
If working on the unit’s isolation switch, ensure
that electrical power is isolated and locked to
prevent accidental resetting.
Attention! Permitted Voltage!
Check incoming electrical voltage and
operating frequency conform to the electrical
wiring diagram and the manufacturer’s type
plate attached to the unit.
Electrical connection to be made in accordance
with local regulations.
Attention! Loose terminal connections!
Due to vibration during transportation it is
advised that electrical terminals are checked
for security and retightened where necessary
The following connecting terminals in the electrical
control cabinet should be checked periodically and
retightened if necessary:
• Connecting terminals in the main isolator switch.
• Connecting terminals in main components of
the heater circuits.
• Connecting terminals in main components of
the fans circuits.
Periodical as dened in this manual means:
• During installation.
• Two months after commissioning date.
• During annual maintenance.
Attention! Electrical parameters!
Parameters used in the electrical protection and
alarm circuits must not be modied or adjusted.
Factory (default) parameters are shown in the
electrical wiring diagrams.
Attention! Safety functions!
The operation of all electric safety devices are
to be checked at commissioning and during
service/maintenance. Under no circumstances
are these devices to be deactivated (e.g.
adjustment or bridging).
Attention! Defective electrical components!
Defective electrical components and defective
wiring must be replaced immediately. The
equipment must not be operated until the defect
has been repaired and the unit re-tested
1.4.6 Unit related safety advice
Attention! Danger from incorrect installation!
The air dryer is designed for internal installation.
For external use it will require a weatherproof
enclosure. Water hoses must not be used
adjacent to this unit.
Use of the air dryer in areas having a potentially
explosive atmosphere (Ex-area) or treatment
of air with potential explosive/flammable
components is prohibited.
The air dryer requires installing on a horizontal
plane.
The air ducts shall be connected load and
vibration free.
Attention! As standard, the air dryer is
equipped with electrical resistive heater
elements (regeneration air heater).
For normal shut down, switch off the unit using
the OFF-button. If switching the unit off in an
EMERGENCY, the main isolator switch or
emergency stop button may be used. However,
residual heat from the heater elements will
remain in the unit and this can result in damage
to components close to the heater and release
of the safety thermostat TH1.
For maintenance purposes shut down the unit
using the OFF button and allow the system to
cool down before attempting to access internal
components.
Attention! Automatic restart after power failure!
(Option)
If the automatic restart function was selected
(option), to prevent unintentional restart, ensure
that the main isolator switch is off and power
isolated before servicing internal components.
Advise all operating & maintenance personnel
regarding automatic restart function if
applicable.
7
Do not remove the warning notice on the
machine which alerts personnel to the dangers
of an automatic restart function.
Attention! Condensate in wet air outlet duct.
Due to concentrated water content in the wet
air outlet duct, incidental condensate may
ow back into the machine and damage the
equipment. To prevent this, install the wet air
outlet duct at a slight gradient. If the duct needs
to be installed at high level, x a condensate
drain at the lowest point of the duct.
In cold areas the wet air duct-work should also
be insulated.
Ensure that the condensate drain does not
create an ice hazard in winter.
Attention! Equipment fans can produce noise
levels above 80 dB (A) depending on duct-work
connection used.
Use ear protection, if remaining close to an
operating machine for any length of time.
Pay attention to accessibility requirements for
maintenance and service purposes.
1.4.7 Hazardous operating conditions
Operation of the system is deemed to be hazardous, if:
• Is not operated inside or is not protected within
a weatherproof enclosure.
• Is not operated within the permitted operating
parameters (see technical specications).
• Is operated outside the scope of ‘normal’ use
(see intended use).
1.4.8 Responsibilities of the operator
It is the responsibility of the operator of the system to
ensure that all personnel engaged with installation,
operation, maintenance and service of the equipment
have read and understand the relevant sections of
this manual.
1.4.9 Minimising hazards
To ensure risk to personnel is minimised:
• Ensure that all activities relating to this
equipment are carried out by qualied and
authorised staff only.
• Identify and prevent potential safety hazards in
the environment.
Failure-free Operation
• To ensure a failure-free operation, please make
the following arrangements:
• Keep this manual ready to hand with the unit.
• Use the machine as intended only.
• Only use the machine if it is fully functional.
• Check the condition of the machine before
using.
• Check the machine on operational efciency at
regular intervals.
• Carry out maintenance and testing at the
prescribed intervals.
8
Rotor
Wet air outlet
Regeneration
air fan
Process-air
inlet
Dry air outlet
Rotor motor
RECUSORB is a continuous dehumidier with internal energy recovery and able to
reach very low dew points. During regeneration, sensible heat is adsorbed by the rotor
material. This heat is transferred to a purge sector where the incoming regeneration
air is preheated and its moisture content reduced. While less heat is now required to
reach the nal regeneration temperature, the air will also be at a much lower rela-
tive humidity. As a result of this, the dry air outlet is both cooler and drier than that
achieved by other desiccant systems.
Regeneration heater
Process air fan
FIGURE 1: Principle of Operation
2 General Description
2.1 Applications
DST desiccant type dehumidiers are normally used
where dry air is essential to the various manufacturing
processes used in chemical, pharmaceutical, food or
confectionery industries, or where a dry environment is
required for storing and handling of moisture sensitive
products and raw materials.
The well proven air drying technology using the
adsorption principle provides great exibility in solving
humidity problems. It offers the user independent
humidity control, down to dew points far lower than the
effective operating range of refrigeration dehumidiers.
2.2 Construction
The standard dehumidiers are made as complete
units including rotor, fans, rotor motor and rotor drive
transmission, heater for the regeneration, controls and
electrical equipment.
The regeneration heater is normally electric, but steam,
hot water or gas-heater is available as option.
The water vapour is effectively adsorbed from the
treated air in the SSCR silica gel rotor.
2.3 Principle of operation
It works on a continuous process with two air streams
of different ow rates, normally having a ow ratio of
approximately 3 to 1. The greater ow, process air,
is dried as it passes through the dehumidier, while
the smaller ow, regeneration air, is used to heat the
rotor material to drive the adsorbed moisture vapour
from the desiccant. The moisture which is removed
from the process air, is transferred over to the other
as the SSCR rotor turns slowly.
9
FIGURE 2: Rotor matrix
3 Design
The unit should be electrically isolated
before dismantling. The main switch
should be in position "0", and can be
locked in this position.
If the unit has been in operation, wait until
the regeneration fan has stopped before
disconnecting and dismantling the unit.
The unit is designed so that it easily can
be lifted by a fork lift. To allow securing
of the unit to the oor or to a pedestal,
square washers are delivered with the
unit.
1. Electric equipment
2. Rotor
3. Rotor motor
4. Reg lter
5. Process lters
6. Process fan
7. Reg. fan, behind
electric cabinet
8. Regen. heater
9. Process air in
10. Dry air out
11. Regen. air in
12. By-pass
13. Wet air out, behind
electric cabinet
1
2
6
10
11
3
8
7
5
9
12
4
13
Section of a dehumidier rotor from Seibu Giken.
The high number of channels means that mois-
ture is adsorbed with extra
efciency!
FIGURE 3: Principle function of the rotor
FIGURE 4: Principle of design
high capacity for adsorbing water vapour. It has a
galvanized sheet metal lining, spokes and a hub and
two bearings on which it rotates around a xed steel
shaft.
3.1 Housing and dismantling
The RECUSORB RZ dehumidier has a housing
of galvanized sheet metal (AlZn). The unit housing
contains rotor, rotor motor with belt transmission,
regeneration heater and lters. The fans and the
electrical control equipment are placed externally on
the unit.
The regeneration fan removes residual heat from the
regeneration heater for ten minutes after the unit has
been switched off.
The access panel at the front of the unit can easily be
opened, to enable service and inspection. The panels
can be opened without any tools as they are xed with
hand wheels.
The rotor unit is located between the two panel doors
at the front. It contains rotor, rotor transmission and
rotor motor. The short side of the rotor unit has a
polycarbonate access panel, which is screwed to the
rotor unit. The panel is removed to gain access to the
rotor and the rotor transmission. The rotor motor can
be reached when the left hand panel door is opened.
The electric box with control panel and all electric
equipment is located on the top of the unit. The lids
of the electric box can be opened when the lock are
turned with a key that is attached with the unit.
The air connections are round galvanized spigots in
standard dimensions.
3.2 Rotor
The heart of a DST dehumidier is the very efcient
patented SSCR silica gel rotor. The rotor matrix
is manufactured from alternate layers of at and
corrugated sheets of silica gel and metal silicates,
chemically bonded into a tissue of inorganic bres. It
is made to form a vast number of axial air channels
running parallel through the structure. The large
internal surface area combined with the special micro
structure of the SSCR silica gel material, ensures
maximum contact area to give the rotor an extremely
10
4.1 Standard conguration
4.1.1 Rotor motor
The rotor is driven by a single phase rotor motor with a
timing belt transmission. A belt tension device prevents
belt slipping and overload of the rotor motor.
The rotor has both peripheral
and radial seals.
The peripheral seals are
mounted with hose clips.
The radial seals are made
of teon and are held in
place by steel rulers.
4.1.2 Filters
The air lters are synthetic bre bag lters. Standard
class G4 lter.
4.1.3 Fans
The regeneration air fan is a medium pressure, single
inlet centrifugal fans, directly driven by three-phase
motor.
4.1.4 Heater and heater control
The regeneration heater is
normally an electric heater,
but steam, hot water or gas
heaters are also available.
For units with steam or hot
water, only battery is included.
At installation shall valve
and steamtrap be installed
externally, see steam coil
installation.
* Components may slightly differ from delivered product
4 Components and features
FIGURE 5: Rotor motor*
FIGURE 6: Standard process and regeneration fan*
FIGURE 7: Electric regeneration
FIGURE 9: TH1
ProcessReg
ProcessReg
FIGURE 10: Pressure nozzles
4.1.5 Electric box design
The PLC control panel is located at the front of the
control box. Inside, the electric box houses multiples
electronic devices and control units, such as contactors,
fuses, motor protectors, relays, transformer. They are
attached to the DIN-rails
Possible remote ON/OFF control (for example
humidistat) and potential free alarm contacts are to be
connected on this xed terminal, see wiring diagram
for installation.
4.1.6 Overheat protection and control
thermostat
TH1 is a mechanical overheat protector. The reset
button and adjustment are made on the thermostat.
TH2 (located inside heater champber) and TH3
(located on wet air out) are electronic temperature
transmitters, thermostat. The devices regulates the
regeneration heater temperature.
Note: If TH1 is triggered, the unit will stop and start
the cooling process for a pre-set time. The overheat
protector automatically triggers the regeneration
heater fuses as well. To restore operation, reset TH1
and Fuses F3 through F6.
See “10 Technical data” for default settings.
4.1.7 Pressure nozzles
Located on the rear side of the unit. Are to be used
with gauges and other pressure sensitive devices.
The electric heater battery has a
thermostat. The thermostat is found in
the electric box.
FIGURE 8: Inside electric cabinet
To reach the reset button,
unscrew the cap on TH1
counter-clockwise.
11
4.2 Special congurations (Options)
4.2.1 Filter guards
Filter guards for process air and reg. air are available
as an option.
Different types of lter guards and pressure gauges are
available for installation. Such as, standard mechanical
differential U-tube manometers.
Other option is a electronic lter guard with a warning
light. The warning light will turn on if the pressure has
dropped below the pre-set value.
The recommended pressure will decide when to
change lter (See technical data)
4.2.2 Humidistat control
The heater can be controlled by two Humidistat inputs
(see wiring diagram). When both of the Humidistat
inputs are closed, the heater operates at maximum
output. The 2-step humidistat operates accordingly.
1) When Humidistat 2 opens...
The heater output reduces the kW* effect.
*RZ-081: 10.2kW, RZ-101: 17.1kW, RZ-102: 27kW
2) When Humidistat 1 opens...
a) In AUTO-OFF mode - Turns off the heater
completely and initiate shutdown procedure.
b) In AUTO-VENT mode - The heaters and reg. fan
are turned off completely. Rotor motor and process
fan will continue to run.
4.2.3 Electronic controllers
Electronic controller such as EH4 and EH3 are
available as an option.
4.2.4 Automatic restart
Automatic restart after power failure. Also equipped
with a emergency stop button and labelled with
warning signs.
4.2.5 Emergency stop
When the unit is equipped with automatic restart.
4.2.6 Rotation guard
Display an larm on the PLC and stop the unit if the
rotor have stopped.
4.2.7 Energy saving
The RZ units can be controlled in 3 different "Energy
saving versions.
Energy saving 1: The dehumidier is controlled
by 1- or 2-step humidistats. In example an electric-
mechanical HMH, or the controllers EH3 or EH4
Energy saving 2: Controls the heater for units with
electric or gas heater. Can be linear, via a triac, or
binary. The dehumidier is controlled by a regulator
signal 0-10VDC, for example controllers EH3 or EH4.
Energy saving 3: Controls the regeneration airow
and thereby the steam consumption for units with
steam heater. The dehumidification capacity is
controlled from around 15% up to full capacity.
The dehumidier is controlled by a regulator signal
0-10VDC, for example controllers EH3 or EH4.
See appendix on energy saving
Filter guards Pressure gauges
Warning
lights
FIGURE 11: Differential U-tube manometers
FIGURE 12: Electronic lter guard
FIGURE 13: Humidistat 1 & 2 illustration
Full heater effect
Partial heater effect
No heater effect
Humidistat 2 (CLOSE)
Humidistat 1 (CLOSE)
Humidistat 2 (OPEN)
Humidistat 1 (CLOSE)
Humidistat 2 (OPEN)
Humidistat 1 (OPEN)
ON
OFF
ON
OFF
OFF
ON
12
4.2.8 Linear & binary control
The heating is a combination of binary and linearly
control run by a 0-10VDC external signal. This allows
the unit the micro manage and adjust the heating
output instantly which will dehumify with accuracy and
improve the energy efciency.
The linear is heating is controlled by a TRIAC and
is coupled to the rst contactor, R1. The rest of the
contactors (R2-R4) are managed binary by the step
controller.
The heating system will always run R1 as linear
from 0-8kW. To increase the output, >8kW, the
step controller will activate the contactors (R2-R4),
statically, in different sequences, thus creating a
greater output than 8kW. The process is reveresed
when the power is decreased.
"E.g. the rst step of linear heating streches from
0-8kW (R1). If the need of more heating output is
required, >8kW. The step controller will activate R2
(8kW) with full effect, and at the same time the program
will deactivate the R1 and restart the linear heating
from zero and thus create a linear control that streches
from 8-16kW (8kW R1 +(0-8kWR2), not 0-16kW The
third and fourth step is based on same process, i.e.
16R3+(0-8R1), 24R1+R3+(0-8R1).
See illustration.
See more details and description in the appendix.
R1 = 8kW (linear heating)
R2 = 8kW
R3 = 16kW
R4 = 32kW
FIGURE 14: Binary and linearly control
kW
64
56
48
40
32
24
16
8
R1
R1
R1
R1
R1
R1
R1
R1
R2
R3
R2+R3
R4
R2+R4
R4+R3
R2+R3+R4
4.2.9 Adjustable rotor speed
Stepless variation of the rotor speed. Can be equipped
with a manual control unit (potentiometer).
4.2.10 Frequency converter
Eletronic speed regulator for electric fans.
13
DST dehumidiers are prepared for easy connection
to duct-work and electric supplies.
5.1 Duct-work
If the unit is installed inside the dehumidied area,
regeneration air inlet and wet air outlet duct-work is
connected to ambient. See example installation gure.
If the unit is installed in a plant room, dry air supply
and process air return duct-work is connected to
the dehumidied area and, unless the plant room is
adequately ventilated, regeneration air inlet and wet
air outlet to ambient.
The same care should be taken for the process air
inlet and the dry air outlet.
Due to the high moisture content at the wet air outlet,
condensation may occur within the duct-work. It is
therefore recommended that the wet air outlet duct-
work is well insulated and installed at an angle so that
condensate cannot ow back into the dehumidier. If
the duct must be installed higher than the outlet, a small
drain hole is to be made for discharge of condensate
at the lowest point in the duct-work.
5.2 Electrical connection
The terminal for connection of the supply cable is
easily accessible in the left part of the electric box.
The electrical supply to the unit should be three phase,
voltage according to electrical diagram, and earth. No
neutral is required. The connection L1, L2, L3 should
be fused with slow fuses, rated according to data
sheet in appendix .
Volt-free contacts are provided for wiring to remote
alarm indication (normally closed, will open at alarm).
The connections for these facilities are prepared on
the control terminal block. Refer to wiring diagram.
5.3 Humidistat connections
The step with the lowest set-point is connected to
humidistat 1, see enclosed wiring diagram.
This will switch off the whole heater, regen. fan and,
if auto-off is chosen, process fan and rotor motor. In
auto-vent mode the process fan and rotor motor will
continue to run.
The step with the highest set-point is connected to
humidistat 2, see enclosed wiring diagram.
If it is a one-step humidistat it should be connected
to humidistat 1. Humidistat 2 should then be bridged.
5.4 Remote connection
Beside the humidistat connections there are a remote
connection that will switch off the whole unit when
opened regardless of operation mode.
5.5 Steam or hot water
regeneration
For units with steam or hot water, only battery is
included.
All electric cables to the unit are to be
drawn through the cable inlet on the
right hand side of the electric box.
5 Installation
The dehumidier unit must not be used
in an area where there is a danger of
explosion nor to treat air with dangerous
amounts of explosive substances.
DEHUMIDIFIED AREA
OUTDOOR
1
2
3
4
1. Process air in
2. Reg. air in
3. Wet air out
4. Dry air out
(A)
(C)
FIGURE 15: Installation
A) Wet air duct
should be sloop-
ing downward
slightly in order to
stop condensate
from running back
in to the unit.
B) Check that
wet air out and
process air in is
turned from each
other, so that re-
circulation will be
avoided.
C) Check that
the dry air is well
distributed in the
dehumidied area.
(B)
In all installations it is important to ensure
that the wet air outlet is directed away
from the regeneration air inlet of the unit.
If a lower moisture content is required,
then a damper should be installed on the
dry air outlet.
At installation shall valve and steamtrap
be installed externally.
14
5.6 Positioning
The unit can be lifted with a fork-truck between the
units feet or. The weight of the unit is shown in the
data sheet in appendix.
To enable inspection and service of the unit, adequate
working space must be left clear in front of the unit to
allow access doors to be opened and the rotor to be
removed. The free oor area in front of the inspection
doors should be as wide as the unit itself.
For more
detailed information on working space and foot bolt-
hole dimensions, see appendix.
The standard unit is designed for indoor installation.
Weatherproof units can be supplied as an optional
extra.
FIGURE 16: Locating bracket
FIGURE 17: Dehumidier leg
To allow securing of the dehumidier to
the oor or to a pedestal, four brackets
with pre-drilled boltholes are delivered
with the unit.
15
Jazz EN.04 11.03 - STD
6 Operating
ON OFF
Heater
Temp Mode
Info
Hour Hour
proc reg
9 087
4 5 6
321
+/-
FIGURE 18: PLC-keys
2
1
3
4 5 6 7 8 9 10 11
REMOTE / LOCAL
12
6.1 Keys
1. [ON / 1] - Start 9. Navigation keys
[] - Present value, software version
and browse up
[] - Set points and browse down
[] - Browse right
[] - Browse left
2. [OFF / 2] - Stop
3. [Heater / 5] - Selecting the active heater steps
for electric heater.
4. [Temp / 7] - Temperature setting for TH2 and
TH3
10. [↵] - Select choice, conrm choice
5. [Mode / 8] - Select different mode (AUTO-OFF
or AUTO VENT)
11. [(i)] - Display rmware information
6. [Hour-proc / 9] - Run time for process fan 12. [Local / Remote] - Enable or disable the
humidistat/external
regulator control
7. [Info / 6] - Function description/Back
8. [Hour-reg / 0] - Total run time for regeneration
heaters
16
Jazz EN.04 11.03 - STD
6.2 Start
The unit will initiate starting sequence by activating the
process fan, rotor motor, reg. fan and heaters.
- The start-up will last for appx.15 seconds.
- The ventilation mode can only be set when the unit is in
standby-mode and when the PLC displays:
Seibu Giken DST
Start press 1
OPERATING INSTRUCTION
1. Press [Mode / 8] to enter venting mode*: Select “AUTO-VENT”
or “AUTO-OFF” by entering “1” or “0”, respectively. Conrm
and exit by pressing [↵] twice.
2. Select mode*: “LOCAL” or “REMOTE” on [Local / Remote]
switch (Use “REMOTE” if a humidistat/external regulator is
connected, use “LOCAL” if else).
3. Press [ON / 1]. Display shows “Start up” and the unit will initiate
starting procedure.
ON OFF
Heater
Temp Mode
Info
Hour Hour
proc reg
9 087
4 5 6
321
REMOTE / LOCAL
1) Select mode
2) Switch to
"REMOTE"
or "LOCAL"
3) Press "ON"
FIGURE 19: Starting the dehumidier in AUTO/OFF or AUTO/VENT
6.3 Stop
The unit will start to shut down and come to a complete
stop.
- During shut down, the regeneration fan and rotor motor
will continue tor run for a pre-set time as a part of a
cooling stage.
OPERATING INSTRUCTION
1. Press [OFF / 2]
ON OFF
Heater
Temp Mode
Info
Hour Hour
proc reg
9 087
4 5 6
321
1) Press "OFF"
FIGURE 20: Stopping the dehumidier
6.4 Run time - Heaters
Monitors the total running time for heaters.
- Can only be used during operation (Feature not available
if the unit is equipped with hot water or steam heater).
OPERATING INSTRUCTION
1. Press [Hour-reg / 0] once to view run time for heater group 1 ,
press the same key again to view the rest of the heater groups
and to exit the menu.
ON OFF
Heater
Temp Mode
Info
Hour Hour
proc reg
9 087
4 5 6
321
1) Select run time 1
FIGURE 21: Run time for heaters
6.5 Run time - Process fan
Monitors the running time for process fan.
- Can only be used during operation.
OPERATING INSTRUCTION
1. Press [Hour-proc / 9] to display run time for process fan.
Press [Hour-proc / 9] again to exit.
ON OFF
Heater
Temp Mode
Info
Hour Hour
proc reg
9 087
4 5 6
321
1) Select run time 2
FIGURE 22: Run time for process fan in operation
6.6 Adjusting TH2 &TH3 setpoint
Adjusting the TH2 and TH3 through the PLC.
- The adjustment can only be performed during standby-
mode.
- Unit with steam or hot water coil is not equipped with
TH1, the menu will only display TH2 and TH3.
- TH1 is a mechanical overheat protector and is located
inside the electrical cabinet.
- The setpoint mode can only be set when the unit is in
standby-mode and when the PLC displays:
Seibu Giken DST
Start press 1
OPERATING INSTRUCTION
1. Press and hold [Temp / 7] until the menu shows up.
2. Enter the password (1919) with the numerical keys and press
[↵].
3. Enter TH2 temperature setting by pressing the numerical keys.
Press [↵] to conrm and [↵] again to continue.
4. Enter TH2 temperature setting by pressing the numerical keys.
Press [↵] to conrm and [↵] again to exit.
Always stop the unit according to above procedure.
Use the “main switch” to shut down the unit in
EMERGENCY-case only(!) If doing so, will deacti-
vate the post-cooling procedure and may damage
the rotor and the surrounding equipment due to
heat build-up. See “1 Unit related safety chapter”.
17
Jazz EN.04 11.03 - STD
ON OFF
Heater
Temp Mode
Info
Hour Hour
proc reg
9 087
4 5 6
321
1) TH1, TH2 & TH3
ON OFF
Heater
Temp Mode
Info
Hour Hour
proc reg
9 087
4 5 6
321
2) Conrm and exit
FIGURE 23: TH1, TH2 and TH3
Do not set TH1, TH2 and TH3 temperature setting
above the recommended value stated in the technical
data. Consult DST-representative before changing
the setpoints.
6.7 Reset buttons & switches
Fuses, overheat protections or motor protectors are
found inside the electrical cabinet. The position and
denotation of the devices may vary depending on the
unit and conguration.
Reset the devices when asked by the PLC. See
troubleshooting for more information.
See the electrical diagram for correct layout and
information of the reset devices.
FIGURE 24: Example of a component layout inside an electrical
cabinet.
See the electrical diagram for correct layout and
information of the reset devices.
6.8 Reset the PLC & restart unit
Once the error has been corrected, use the PLC to reset
itself and restart the unit. If the unit does not start up,
check the display for errors and correct it.
- The unit can only start when the PLC displays:
Seibu Giken DST
Start press 1
OPERATING INSTRUCTION
1. Press [OFF / 2] to remove the errors on the display.
2. Press [Mode / 8] to enter dehumidication mode*: Select
“AUTO/VENT” or “AUTO/OFF” by entering “1” or “0”,
respectively. Conrm and exit by pressing [↵] twice.
3. Select “REMOTE” or “LOCAL” on [Local / Remote] switch.
4. Press [ON / 1]. Display shows “Start up” and the unit will initiate
starting procedure.
ON OFF
Heater
Temp Mode
Info
Hour Hour
proc reg
9 087
4 5 6
321
REMOTE / LOCAL
2) Select mode
3) Switch to
"REMOTE"
or "LOCAL"
4) Press "ON" 1) Press "OFF"
FIGURE 25: Reset PLC and restart the unit
6.9 Conguration check
During pre-operation, check the conguration according
to the specication.
Aut restart Yes/No
Press 6
Energy save 2 Yes/No
Press 6
Unit size XX-###
Press 6
Triac Yes/No
Press 6
Process fan Yes/No
Press 6
Rotor guard Yes/No
Press 6
Seibu Giken DST
Start press 1
3. Energy saving step 2.
Press [Info / 6] to continue.
5. Linear control of the
heater. Press [Info / 6] to
continue.
6. Equipped with process
fan or not. Press [Info / 6]
to continue.
7. Rotation guard. Press
[Info / 6] to exit.
1. Press and hold [Info /
6] for 5 sec to access the
conguration menu.
4. Automatic restart after
power failure. Press [Info /
6] to continue.
2. Correct software for unit
size. Press [Info / 6] to
continue.
FIGURE 26: Unit conguration check
When “Aut. Rest” is selected. The unit starts
automatically after electric failure. It is up to
DST’s representatives to inform any parties
that are involved with installation, operation,
18
Jazz EN.04 11.03 - STD
6.10 Remote operation
A connected remote switch will act as a master switch
and will shut down the unit (shutting down from remote
will be the same as pressing [OFF / 2]). The dehumidier
cannot start-up on-site using the PLC or the control panel
before the remote switch has been restored.
6.11 Start-up procedure
During start-up, the unit will go through a series of
activation. See illustration.
ON OFF
Heater
Temp Mode
Info
Hour Hour
proc reg
9 087
4 5 6
321
Rotor motor
Heater 1...7
START-UP
Rotor motor
During start-up, the unit will
activate the heaters in 7 steps.
The PLC will display the output
in kW (only for electrical heat-
ers).
FIGURE 27: Start-up sequence
6.12 Shut down procedure
During shut down, the unit will incrementally deactivate
each moving component. The post-cooling procedure will
continue for a pre-set time.
The procedure applies when [OFF / 2] is pressed,
remotely deactivated or when the mode is set to AUTO/
OFF (controlled by a humidistat/external regulator).
The reg. fan and rotor motor
will continue to run for a pre-set
time or turn off in advance when
the reg. heater temperature
is low enough. See electrical
diagram.
Heater 1...7
Process fan
ON OFF
Heater
Temp Mode
Info
Hour Hour
proc reg
9 087
4 5 6
321
STOP
Reg. fan
Rotor motor
FIGURE 28: Shut down sequence
6.13 PLC operation messages
During operation the following messages may appear on
the PLC. These messages are not to be confused with
ALARMS codes.
LOW HUMID
When the attached external regulator is giving off a signal
0.5V or lower in a period 5 mins or more.
OPERATION HUMIDISTAT
The unit is either running on Auto-On or Auto-Off, with
both Humidistats 1 & 2 opened.
OPERATION EH3
When the attached electric controller EH3 is giving off a
signal of 0.5V or lower in a period 5 mins or more.
REGFAN OFF DELAY
#### C #### s
During shut down or standby (if an external regulator is
connected or humidistat 1 & 2 is opened). The display will
also show the current heater temperature and countdown
until the reg. fan stops.
HUMIDISTAT1 OPEN
If the %RH has dropped below setpoint 1 (Appears only
if a humidistat is connected)
STARTING UP
SYSTEM OK
Initiating the start-up sequence. All system are fully
operational.
STARTING UP
DIRTY PROCFILTER / DIRTY REGFILTER
Initiating the start-up sequence. Change process or reg.
lter (Units with electronic lter guard).
STARTING UP
FILTERS OK
Initiating the start-up sequence and no lter changes is
needed (Units with electronic lter guards)
OPERATION ##kW
During normal operation The output will vary depending
on the size of the unit.
OPERATION
During normal operation. No output is displayed if the unit
is installed with hot water or steam heaters.
OPERATION TH2
Reg temp ##°C
When the maximum temperature of TH2 has been
reached. The PLC deactivates the heater step by step
to reduce the temperature.
OPERATION REMOTE
The connected remote has shut down the dehumidier.
19
The operator of the system has to assure,
that all people, which are engaged with in-
stallation, operation and maintenance or
reparation of the machine, read the parts
of the manual from beginning until end..
7 Starting up
7.1 Pre-operation Checks
1. Inspect and clean the inside of the unit from
foreign objects such as rags, tools, particles of
metal, and the like.
2. Ensure that both air balance dampers, if any,
are wide open and check that the air paths of
the duct-work are not obstructed in any way.
3. Check that the lters are securely in place.
4. Inspect the wiring of incoming cable.
5. Check that the rating of the electrical supply
fuses is correct, see wiring diagram.
7.2 Start-up
1. Close and secure all access doors and then
switch the main switch to "1"
2. Briey switch the unit ON and then switch it
OFF watching, as the fans slows down, the
direction of fan rotation. If incorrect, check
troubleshooting.
3. Balance the airows, using the dampers in the
duct-work. For maximum dehumidifying both
dampers should be wide open. If a greater
reduction in moisture content is needed the
process air damper should be throttled. If the
wet air outlet gets very hot (more than 70°C)
or if the maximum capacity is not needed the
regeneration damper should be throttled or/and
a heater step can be switched off.
4. Measure the voltage on both fans and compare
the numbers labelled on fan. If the voltage is
too high, adjust and decrease the airow.
5. Check performance in accordance with the
capacity diagram of the dehumidier.
7.3 Responsibilities of the
operator
The safety at the machine can take place in practice,
if all required arrangements are taken.
20
CODE EXPLANATION CAUSE SOLUTION
Motorst. Q1 or Q2. Process fan overload
(Q1).
Too high airow.
Motor failure.
Readjust the airow.
Reset Q1.
Set point.
Reg. fan overload (Q2). Too high airow.
Motor failure.
Readjust the airow.
Reset Q2.
Set point.
Fuse F3-6 or TH1. Overheat protection on
reg heater tripped (TH1).
Heater failure. Reset TH1 and F3 through F5.
Note that TH1 will also switch off heater
fuses.
For TH1 adjustment see technical data.
Heater overload (F3
through F6).
Regeneration fan failure.
Regeneration airow blocked in some
way, for example dirty lters.
Very high temperature on reg. inlet.
Reset TH1 and F3 through F5.
Note that TH1 will also switch off heater
fuses.
For adjustment see technical data.
Frost guard GT81 F r ee z ing p rot e ct i o n
device stops the unit.
Temperature on the hot water outlet /
condensate outlet is below 7°C.
Check supply and insulation for potential
thermal loss.
Restart the unit.
Thermostat TH3. Wet air thermostat tripped
(TH3).
Rotor has stopped.
Process fan has stopped.
Very low moisture load in the process air.
Wet air temperature too high.
Low react. air ow.
Readjust the airow.
Reset TH3.
Rotor stopped. Rotor stopped (E2). Rotor motor failure.
Rotor motor gear.
Belt transmission.
Slipping belt.
Distance too great between sensor and
contact screw.
Sensor failure.
Press [OFF/1] and restart the unit.
Fr.converter U1/U2. Frequency converter
alarm (U1 or U2).
Frequency converter failure. Read message on the converter display,
check the list/check the frequency converter
manual for troubleshooting. Press [OFF / 2]
and restart the unit.
Emergency stop. Emergency stop. The emergency button is still active. Pull the emergency button to restore. Press
[OFF / 1] and restart the unit.
FIGURE 29: PLC alarm table and solution
8 Troubleshooting
8.1 PLC-error codes
If an error occurs, the dehumidier will shut down,
but the reg. fan continues to operate in order to cool
down the regeneration heater for a preset time. See
technical data for time setting.
During shutdown, the PLC will promptly display a code,
where the error is located. The table below displays
the frequent error codes for the CZ-series.
Table of contents
Other DST Dehumidifier manuals
