SET 1501 T User manual

SET 1501 T / 2501 T / 3501 T
SERVICE MANUAL
en Rev. 1.0 • 2021-W12-3

3
Introduction: Table of contents
Introduction
Table of contents
Introduction .....................................................................3
Table of contents......................................................................3
Overview .............................................................................4
Declaration of Conformity .............................................................5
Product description ..............................................................6
Overall description ....................................................................6
Enclosure dimensions .................................................................9
Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Installation environment .............................................................11
Wall mounting .......................................................................12
Floor mounting ......................................................................14
Electrical connection .................................................................15
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Control panel ........................................................................18
Maintenance and care .......................................................... 20
Preventative maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Software update and log les.........................................................21
Trouble shooting .....................................................................23
Spare parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Schematics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Cooling circuit .......................................................................27
Main PCB ............................................................................28
Wiring diagram ......................................................................29
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Introduction: Overview
Overview
The target group for this service manual is the technicians who install and maintain the SET
1501 T/ 2501 T/ 3501 T dehumidier. Thus the manual covers instructions about installation,
operation and maintenance.
It is the responsibility of the operator to read and understand this service manual and other
information provided and to use the correct operating procedure.
Read the entire manual before the initial start-up of the unit. It is important to know the cor-
rect operating procedures for the unit and all safety precautions to prevent the possibility of
property damage and/or personal injury.
It is the responsibility of the installer to ensure the conformity of all, not supplied cables
towards national regulations.
Copying of this service manual, or part of it, is forbidden without prior written permission
from SET Energietechnik GmbH.
SET Energietechnik GmbH reserves the right to make changes and improvements to the
product and the service manual at any time without prior notice or obligation.
The unit is designed to last for many years. When the time comes for the unit to be recycled, it
should be recycled according to national rules and procedures to protect the environment.
The dehumidiers contain R407C refrigerant and compressor oil. The compressor must be
returned to authorities for disposal according to local regulations.
Type and source of hazard
This symbol in connection with the word “Danger”warns of a high risk or severe injury or
acute danger to life.
• Measures to avert danger or immediate measures if the risk occurs are described in this
way
Type and source of hazard
This symbol in connection with the word “Warning”warns of a risk involving severe injury.
• Measures to avert danger or immediate measures if the risk occurs are described in this
way
Type and source of hazard
This symbol in connection with the word“Caution” warns of a risk of minor or moderate injury
and material damage.
• Measures to avert danger or immediate measures if the risk occurs are described in this
way
In connection with this symbol you will nd further tips and information concerning the use
of the device.
Target group
Safety precautions
Copyright
Reservations
Recycling
Warning
Caution
DANGER
Warning
Caution
WARNING
Warning
Caution
CAUTION
!NOTICE

5
Introduction: Declaration of Conformity
Declaration of Conformity
SET Energietechnik GmbH hereby, declare that the unit mentioned below:
No.: 351510, 351511, 351512
Type: SET 1501 T, SET 2501 T, SET 3501 T
- complies with the following directives:
2006/42/EC Machinery Directive
2014/30/EU EMC Directive
2011/65/EU RoHS Directive
1907/2006/EC REACH Regulation
- and is manufactured in compliance with the following harmonized standards:
DS/EN ISO 12100-2010 Safety of machinery - General principles for design
EN 60 335-1:2012 Household and similar electrical appliances - Safety - Part 1
EN 60 335-2-40:2003 Household and similar electrical appliances - Safety - Part 2-40
EN 60335-2-40: A1 2006 Household and similar electrical appliances - Safety - Part 2-40
EN 378-1:2016 Refrigerating systems and heat pumps
- Safety and environmental requirements - Part 1
EN 378-2:2016 Refrigerating systems and heat pumps
- Safety and environmental requirements - Part 1
Skive, 18.03.2021
Declaration
Jakob Bonde Jessen
Managing director
Mikkel Haldrup Jensen
Project manager designer
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Product description: Overall description
Product description
Overall description
This illustrates the functional principle of the SET 1501 T/ 2501 T/ 3501 T.
Fig. 1
SET 1501 T/ 2501 T/ 3501 T work in accordance with the condensation principle.
Humid air from the pool room is drawn into the unit by one or two fans.
When passing through the evaporator the air is cooled down to below dew point and water
vapour is condensed into water, which is drained.
The dry air is then passed through the condenser where it is heated and returned to the pool
room. As a result of the latent heat from the condensation process and the compressor en-
ergy the return air temperature to the pool room is approx. 5ºC higher than the air from the
pool room.
When the dehumidier is started by the hygrostat, the fan(s) are activated at the same time as
the compressor.
To protect the compressor against overloading there is a timer which prevents the dehu-
midier from starting more than 10 times per hour. It means, that there is at least 6 minutes
between every start up.
This unit is equipped with an intelligent defrosting strategy.
The unit monitors the temperature of the evaporator, and when the temperature has been
below a certain temperature for a period of time, the dehumidier will switch to active
defrosting, the fans will stop, and the magnetic valve will open.
The hot gas can now pass through the evaporator.
When the evaporator has the right temperature again the magnet valve will close and the
dehumidication will continue.
If the temperature in the dehumidier increases to a temperature of more than 55 °C (in case
of fan failure or room air temperature higher than 36 °C), the compressor stops automatically
to avoid damaging it. When the temperature allows it the dehumidication will continue.
Air ow direction
Functionality of
the dehumidier
Fan control
Compressor
control
Defrosting
Safety circuit

7
Product description: Overall description
B
A2
A1
Two cable grooves for accessory make it
easy to guide the cables from the control
panel to the mains electricity connection
and out of the unit.
Groove B is for use with cable from ex-
ternal RH sensor as it requires a separate
groove to avoid interference.
All other accessory cables are to be
placed in groove A1-A2.
An LED is placed on the top inside the
unit. The LED light indicates dierent
modes of the unit.
Find a description of the dierent
modes in section “LED light and trou-
bleshooting”on page 24.
Cable groove
(accessory)
LED
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Product description: Overall description
Pos. Part Illustration
1 Air inlet
2 Air outlet
3 Drip tray
4 Control panel
(behind the cover)
5 Cable groove
(for accessory only)
6 Humidity sensor
7 LED lamp
8 Wall bracket
9 Wall mounting
spacers
(incl. in delivery -
only used for wall
mounting)
10 Floor mount
(incl. in delivery
-only used for oor
mounting)
11 Water drain
12 Mains electricity
connection
(behind the lid)
Presentation
Fig. 2
Bottom view
11
12
1
Front cover
2
6
5
3
4
Inside (front cover removed)
7
8
92x
10
Rear view

9
Product description: Enclosure dimensions
Enclosure dimensions
770
75
-
27904g
SCALE: NOT TO SCALE
MATERIAL:
THICKNESS:
WEIGHT:
REV. BY:
DATE:
REF.:
DATE:
PART NO REV.:
REV.:
PART NO
Sheetmetal atstate is based on Dantherm Air Handling A/S
process equipment and is only intended as a guide.
8
This Drawing is furnished with the understanding that the
essence there of will not be reproduced in whole or in part
without written authorization by Dantherm A/S.
All designs originated by Dantherm A/S are the
property of said Company and will be protected by Patents.
Surface appearance according to reference
table LZT 142 0001, category
Linear dimensions without tolerances according to
DS/ISO 2768-m. Angular dimensions without tolerances: ± 1°
308
308
SET 3501 T - 1488
SET 2501 T - 1154
SET 1501 T - 1004
695
434,2
59,2
308
SET 3501 T - 1488
SET 2501 T - 1154
SET 1501 T - 1004
695
434,2
59,2
Front view
Bottom view
Side view
Fig. 3
Dimensions
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Product description: Technical data
Technical data
Specication unit SET 1501 T SET 2501 T SET 3501 T
Operating range, humidity %RH 40-100 40-100 40-100
Operating range, temperature °C 10-36 10-36 10-36
Air volume at max. external pressure m/h 400 680 900
Capacity at 28ºC - RH 60 l/day 34 52 69
SEC 28ºC - RH 60 kWh/l 0,47 0,48 0,43
Power supply V/Hz 1 × 230/50 1 × 230/50 1 × 230/50
Max. power
consumption kW 0.9 1.5 1.8
Max Ampere
consumption A 3,8 6,6 8
Refrigerant -R407C
Quantity of refrigerant kg 0.7 0.9 1.2
GWP (Global Warming Potential) -1774
Noise level* (1 m from unit) dB(A) 45 47 48
Weight kg 56,5* 66,0* 76,5*
Filter Type PPI 15
Protection class IPX4
*Hanging weight (excl. oor mounts)
Data sheet

11
Installation: Installation environment
Installation
Installation environment
The correct combination of chemicals in an indoor swimming pool is crucial, both for the
health of users and for the inventory inside the pool room and the swimming pool’s technical
room. Insuciently treated water results in poor hygiene, while water that has been exces-
sively treated results in gases in the air that contain chlorine, which can irritate the eyes and
cause breathing diculties.
At the same time, the incorrect composition of chemical ingredients in the water can destroy
all of the inventory in a very short space of time, including the dehumidier and other equip-
ment that have been installed to process the air.
Shown below are the threshold values, which apply to products for indoor swimming pools
in accordance with EN/ISO 12944-2, protection class C4. These threshold values must be com-
plied with for the warranty to be valid.
The following guideline values are applicable to swimming pools with the addition of chemi-
cals.
Chemicals ppm
Free chlorine content 1.0-2.0
Combined chlorine content Max. 1/3 of free chlorine content
pH 7.2-7.6
Total alkalinity 80-150
Calcium hardness 250-450
Total dissolved solids < 2000
Sulphates < 360
The following guideline values are applicable to swimming pools with self-production of
chlorine:
Chemicals ppm
Salt (NaCl) < 30,000
Total dissolved solids < 5500
pH 7.2-7.6
Total alkalinity 80-150
Calcium hardness 250-450
Sulphates < 360
It is advisable to use the Langelier Saturation index to ensure that the combination of the
dierent water parameters is acceptable.
Contact SET Energietechnik GmbH if necessary.
• Do not place the dehumidier close to a heating source, e.g. a radiator.
• Doors and windows must be kept closed when the dehumidier is in function.
• To make sure that the room air passes freely through the dehumidier, air inlet and air
outlet openings must be free.
Water quality in
indoor pools
When adding
chemicals
With own
production of
chlorine
Langelier
Saturation index
Optimal
conditions
!NOTICE
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Installation: Wall mounting
Wall mounting
Please follow this procedure to mount the SET 1501 T/ 2501 T/ 3501 T to the wall:
Step Description Illustration
1 Find the right spot for the de-
humidier and measure where
the wall suspension bar has to
be mounted.
Recommended distance from
dehumidier to:
• Ceiling: min 225 mm
• Floor: min 225 mm
Min. 225 Min. 225198
Min. 727
A
2 Fix the wall suspension bar sup-
plied with the unit to the wall.
NB: It is important to x it
horizontally to ensure correct
condensate outlet.
Mounting
procedure

13
Installation: Wall mounting
3 Fasten the two wall mounting
spacers (included in the deliv-
ery) on the back of the unit.
4Drain outlet:
Connect a drain hose and make
a condensate outlet through
the wall.
Connect a 3/4”exible or xed
water hose to the spigot at the
base of the dehumidier. Make
sure the drainage has a drop of
at least 2 %.
Alternatively:
• A condensate pump can be
tted at the water outlet in
order to pump the water to
a drain.
5 Hang the dehumidier on the
wall suspension bar.
2x
!
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Installation: Floor mounting
Floor mounting
Please follow this procedure to x the oor mounts to the SET 1501 T/ 2501 T/ 3501 T unit:
Step Description Illustration
1 Fasten both oor mounts
to the bottom of the
dehumidier with screws
and nuts (incl. in deliv-
ery).
2 Place the dehumidier
with either
a. a min. space of 225
mm above the unit
or
b. a min. angle of 45°
a) b)
3 If you connect a drain
hose, you have to make
sure that the drain has a
drop.
Avoid a wavy laid hose.
c.
Mounting
procedure
min. 45°
min.
225mm
min. 45°
min.
225mm

15
Installation: Electrical connection
Electrical connection
Risk of damaging the dehumidier, if it has been lying down.
The compressor can be damaged permanently, when the unit is started up just after it has
been lying down.
• Wait 1 hour with the start up of the dehumidier, if the unit has been lying down (e.g.
during transport or installation).
Risk of electric shock
An electric shock can cause severe burning and in most extreme cases shock to the brain,
strain to the heart, injury to other organs or result in death.
• Switch o the power on the main switch, while you open the dehumidier.
• Remember also to switch o the power, while you close the dehumidier.
Step Description Illustration
1 Loosen the two screws that
secure the lid to the mains
electricity connection. Tilt the
lid in order to get access to the
terminals.
2 Guide the cable for the power
supply through the PG cable
restrainer.
3 Connect the power to the unit in
accordance with the description
stated on the name plate.
See also “Wiring diagram”on
page 29.
4 Close the lid and x it with screws again.
Warning
Caution
CAUTION
Warning
Caution
DANGER
Connection of
power supply
2,5 mm
Min Ø9
Max Ø18
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Installation: Electrical connection
It is the responsibility of the installer to ensure the conformity towards national regulations of
all, not supplied cables.
The interfaces and terminals on the control panel make it possible to communicate with the
dehumidier and connect accessory such as a RH/T sensor, an alarm and a heating coil. The
gure and table below describe the dierent functions of the interface.
+v TH TH GND GND + GND + RH ON ON
USB RS485 EXT RH/T ALARM 12V DC
RUN FAIL HEAT1 HEAT2
GND + GND + RH ON ON
OK
1 2 3 4 5
Fig. 4
Pos. Interface Description
1 USB USB is used for datalogging/ software update. See more information
in section “Software update and log les” on page 21.
2 Modbus RTU
(RS-485)
Connection via modbus. A list of data for the Modbus interface can be
downloaded on support.dantherm.com
3 External
RH/T sensor
Terminals for connecting an external humidity/ temperature sensor.
See wiring example in Fig. 5
4 Alarm An external alarm can reveal, if the dehumidier is operating normally
or has an error. See wiring example in Fig. 6
512 VDC
Heat control
Connection of LPHW (water) or electric heating helps controlling the
indoor temperature. Contact your SET dealer for more information.
There is an option for connecting an external RH/T sensor, which makes it possible to overrule
the internal sensors. In Fig. 5 there is an example on how it could be connected.
Fig. 5
*Switch in position: 0 = Internal sensors in use, 1 = External sensors in use
**Note, operational range is within 40-99% RH, if out of range the dehumidier will be in
stand by mode
!NOTICE
Control panel
interfaces
External RH/T
sensor connection
(Optional)
External temperature sensor
(or resistor)
ON/OFF switch for
external sensors*
(Optional)
EXT RH/T
External humidity sensor
(or control unit)
EXT RH/T
V+
TH TH
RH
GND
10kΩ NTC
0V = 0% RH
5V = 50% RH
10V = 100% RH**
0
1
GND
0-10V

17
Installation: Electrical connection
There is an option for connecting an external alarm, which makes it possible to see, when the
dehumidier is operating normally or has an error. In order to use this option you must create
your own external electrical circuit and connect it to the run/fail terminal on the main PCB
(see page 28).
This illustration is an example of how the run/fail circuit could be used.
RUN FAIL
1234
VDC
(Max. 50V, 500mA)
GND
GND
VDC (Max. 50V, 500mA)
RUN FAIL
1234
VDC (Max. 50V, 500mA)
GND
GND
VDC (Max. 50V, 500mA)
NORMAL MODE ERROR MODE
Operational Mode
RUN FAIL
Error Mode
RUN FAIL
Fig. 6
Alarm
Run/ fail
connection
(Optional)
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Operation: Control panel
Operation
Control panel
Risk of electric shock
An electric shock can cause severe burning and in most extreme cases shock to the brain,
strain to the heart, injury to other organs or result in death.
• Switch o the power on the main switch, while you open the dehumidier.
• Remember also to switch o the power, while you close the dehumidier.
Follow the steps below in order to access the control panel.
Step Description Illustration
1 Open the dehumidier:
a) Loosen the two screws at
the bottom of the unit.
Check that the locks release
the front cover.
b) Pull upwards and remove
the front cover.
2 Loosen the two screws and re-
move the upper plate (covering
the control panel).
4 digit Display divided into 2 sections: The rst 2 digits show the code and the last 2 show the
value of the code.
Code Value
By default the display will show the relative humidity RH %. This reading can be from the
external humidity/temperature sensor when available, if not the RH will be from the internal
humidity sensor.
Example
Warning
Caution
DANGER
Accessing the
control panel
a
b
Display
Default view

19
Operation: Control panel
48 rH60 OK
OK
>40
<99 OK
COF
o
>05
<34
OK OK
EFOF >40
<99
OK OK
SIOF >1
<99
OK OK
d001 >1
<255
OK OK
Update to latest software version, if the menu looks dierent.
Code Function Default
value
Value
range
Description
rH Relative
humidity (%)
60 40-99 The unit will start dehumidifying, when the sen-
sor measures a relative humidity higher than the
set value. (Note the +/- 2% hysteresis)
°C°Celcius
(accessory only)
OF
(OFF)
5-34 The el/water heating coil (accessory) will start
to heat, when the temperature is lower than the
set value. (Note the +/- 2 °C hysteresis)
EF Extractor fan
(accessory only)
OF
(OFF)
40-99 The extractor fan (accessory) will start, when the
humidity is higher than the set value, complete-
ly independent of the dehumidier. The value is
measured in % relative humidity.
(Note the +/- 2% hysteresis)
SI Service Interval
(weeks)
OF
(OFF)
1-99 When the Service Interval function is enabled,
the unit will display SEr, when it is time for
service.
d001 Modbus Slave ID 001 1-255 Connection via modbus is possible. The default
modbus slave ID of the unit is 1 and can be
changed to a value between 1-255.
Press and hold OK button for 3 sec to enter menu mode
Toggle Menu Page / change value
Note: If no button is pressed for 10 seconds it will return to Standard view.
Menu overview
Default view
Example
Menu description
OK
Menu buttons
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Maintenance and care: Preventative maintenance
Maintenance and care
Preventative maintenance
The dehumidier requires very little attention for trouble free running. All the necessary
safety and control functions have been built in. The fan motor(s) and the compressor have
permanent lubrication and require no particular maintenance.
Injury - risk of cuts and minor skin burns, when you access the inside of the unit
Be cautious of sharp edges when opening the unit. Internal parts can be very hot or cold.
• Switch o unit for half an hour prior to opening it. Avoid touching very hot and cold parts
as e.g. the pipes or evaporator.
• Avoid touching sharp edges or wear gloves.
The air inlet lter is to be cleaned once a month. The lter is placed in a stand behind the grill
of the air inlet duct. Drip tray and outlet should also be cleaned, so water can run o freely.
Please follow this procedure to perform the monthly service:
Step Action
1 Unlock the two locks underneath the dehumidier
2 Dismount the front cap by lifting it up and take out the lter.
The lter is located on the rear of the front cap
3 Wash the lter in tepid soapy water or vacuum clean thoroughly.
If the lter is faulty, replace it.
4 Insert lter in the lter holder, reattach the cap and lock the two locks. (From Step 1)
NB: If the lter (one size PPI lter with order no. 094686) has to be replaced, you can order it
through a SET dealer.
The dehumidier should be inspected once a year.
Please follow this procedure to perform the annual service:
Step Action
1 Remove the front from the dehumidier
2 Inspect the inside of the dehumidier
3 Vacuum clean the dehumidier to remove any dust or debris
Important: Vacuum clean the condenser thoroughly
4 If necessary wash the lamella evaporator in tepid soapy water if it is badly soiled
Introduction
Warning
Caution
CAUTION
Monthly service
Annual service