Electric Dehumidifier

ROSAHL
Instruction Manual
M-1J1R / M-2J1R / M-3M1R / M-3J1R
M-5J1R / M-7J1R / M-10J1RNOTICE
1. Please read this manual before you use ROSAHL and use it correctly.
2. Please keep this manual to the person who operates, manages and maintains ROSAHL.

RYOSAI TECHNICA CO., LTD.
8-1-1 Tsukaguchi-Honmachi
Amagasaki-City, Hyogo, 661-0001 Japan
Phone : +81-6-6497-9078 Fax : +81-6-6497-9082

For Proper Usage
Supply 3V DC to ROSAHL. DO NOT reverse the polarity.
Dehumidification changes to Humidification when you get a wrong polarity, which may resultin an adverse effect on several things in the container. Furthermore, it causes a chemical
reaction in a porous electrode of cathode side and it causes the trouble of ROSAHL.

Confirm the dehumidifying / humidifying surface of a membrane not to get a wrong direction
before installation. Attaching ROSAHL by mistake will adversely several things in the container.
DO NOT expose the membrane directly to the winds and rain.
Please cover the membrane with a cover or moisture-permeable sheet to prevent it fromgetting wet when using outdoors.

Prohibited

Prohibited

Prohibited

Keep the moisture discharging side of membrane well ventilated.
Prohibited

DO NOT put pin or wire etc into the membrane. It may cause an electric shock andthe membrane may be damaged or deteriorate.

Prohibited

DO NOT use a silicon-based sealing materials to improve airtightness of a container.
Silicon-based sealing materials generate oxime gas and siloxane gas.
As a result, the performance of ROSAHL reduce in a short term.

Prohibited

DO NOT use ROSAHL with vapor phase corrosion inhibitor or insect repellent.
Do not use ROSAHL in a place having high density of organic gas. The performance ofROSAHL reduce in a short term.

Prohibited

DO NOT attempt to disassemble, repair or modify ROSAHL. It may cause an electric shockand the performance deterioration, as this may damage it.

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Prohibited

RB-OP21004-B

Installation
Make a moisture discharging hole and installation hole for the following dimensions on the container,
insert the included gasket and attach ROSAHL with screws.
Note 1) Processed dimensions for Moisture discharging hole and Installation hole, refer to Table 1.
Note 2) Processed dimensions for Rainproof cover, refer to Table 2.
Table 1. Installation dimensions (mm)Model nameM-1J1R
M-2J1R M-3M1R
Moisturedischarging hole 20×25
35×25
35×35
dimensions
Dim. a37
5248
Dim. b42
4250
Dim. c18.5
2624
Dim. dScrews
4-M3 screws
Model name
M-5J1R
Moisturedischarging hole
55×55
dimensions
Dim. a76
Dim. b76
Dim. c38
Dim. dScrews
4-M3 screws

M-3J1R
55×30655032.5* For M-10J1R

M-7J1R

M-10J1R

75×75

105×10510895
50.5
4-M4 screws

152.5
145
72.5
80
8-M4 screws

Table 2. Rainproof cover installation dimensions (mm)*Option parts
Model nameM-1J1R
M-2J1R M-3M1R M-3J1R
Dim. e85
Dim. f115
Rainproof cover
For RDH-3J1
Model nameScrews4-M4 screws
Model nameDim. eDim. fRainproof coverModel nameScrewsM-5J1R
135
125
For
RDH-5J1

M-7J1R
175
150
For
RDH-7J1
4-M4 screws

M-10J1R
225
180
For
RDH-10J1

Precautions for Use of ROSAHL
1) Attach a protective cover as needed not to touch the dehumidifying / humidifying surfaceof a membrane with a hand and an object.
2) Confirm the dehumidifying / humidifying surface of a membrane not to get a wrong direction before
installation. Attaching ROSAHL by mistake will adversely affect several things in the container.
3) Keep strictly the following about power supply to ROSAHL(1) Do not reverse the polarity. Confirm a polarity indication of ROSAHL.
Dehumidification changes to humidification when you get a wrong polarity, which may result inan adverse effect on several things in the container. Furthermore, it causes a chemical reaction ina porous electrode of cathode side and it causes the trouble of ROSAHL.
(2) ROSAHL usually has a big rush current when the power is turned on.
Therefore, we recommend the following power supply.
(3) Use a dedicated power supply for each membrane. When multiple membrane are connected inseries or parallel, the trouble of one membrane may cause all other membranes to be disabled.
(4) The water vapor go through a membrane of ROSAHL. If you switch off a power supply, outside
water vapor is returned into a container and the humidity is restored.

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Table 1. Recommended Power Supply Specifications
Model
Item
Rated output voltage
Rated output current
Overcurrent protection function * Note
Overvoltage protection function
Output voltage variation
Ripple noiseOthers

M-1J1R M-2J1R M-3M1R M-3J1R M-5J1R M-7J1R M-10J1R
3V DC
2A
3A
5A
10A
Required
Required
0.1V or less
0.2V or lessIn accordance with the specifications of commercially availablepower supply

1A

1.5A

2A

Note : Use a constant or fold-back current limiting regarding overcurrent protection function.
You cannot use the power supply with the Hiccup mode current limiting type, because
the voltage more than 2V DC is necessary for ROSAHL when an overcurrent protection
function worked. Also ROSAHL may not work correctly depending on a characteristicof fold-back current limiting.
4) A container must be an airtightness container. If a container has low airtightness and moisturepermeable material, the results may not be what you expected.
5) Attach ROSAHL in the center of the inner side surface of a container with a gasket.
(Do not attach it on a top or bottom surface.)
6) If you use ROSAHL with a gasket that contains an antioxidant, crystal materials may be generated on
the surface of a membrane. When you choose a gasket, evaluate it enough.
7) Do not use silicon-based sealing materials to improve airtightness of a container.
(Silicon-based sealing materials generate oxime gas and siloxane gas.
As a result, the performance of ROSAHL reduce in a short term.)
Additionally, when using any other sealing materials, ROSAHL must be attached after sealing materials
are completely cured. Volatile substances generated during curing affect the performance of ROSAHL.
[Recommended products] : modified silicon caulk (Konishi Co., Ltd.)
8) Do not expose a moisture discharging side of a membrane to water. When using outdoors, be sure
to attach a cover or vent filter to protect a membrane from water or insects.
9) Attach a moisture-permeable sheet to a membrane to protect ROSAHL from much dust or oil mists.
[Recommended products] : Vent Filter TEMISH S-NTF2131A-S06 (Nitto Denko Corporation)10) Keep the moisture discharging side of a membrane well ventilated.
11) Do not use ROSAHL with vapor phase corrosion inhibitor or insect repellent.
Do not use ROSAHL in a place having high density of organic gas.
12) Do not do remodeling. ROSAHL may break down.
13) When you prepare a gasket, we recommend a sponge packing having closed-cell structure(hardness : 10 or less) of the EPT rubber (ethylene propylene rubber). When you use a highhardness packing, there may be a gap between installation plate and gasket. If there is a gap,
the performance of ROSAHL may not be shown enough. Please evaluate it carefully.
In addition, If you use a silicon rubber, you need to vulcanize a gasket (200 deg C / 6 hours)
not to quickly degrade the performance of ROSAHL.
Note : The silicon gasket assembled in ROSAHL is vulcanized. (conditions : 200 deg C / 6 hours)

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Confirmation Items before Using
Please confirm the following items surely before turning on the power.
1. Is the power supply 3V DC?
2. Is the polarity of ROSAHL correct?
3. Does not a membrane get wet?

Usage
1. Please supply 3V DC to ROSAHL.
2. Please adjust a supply voltage in the range of 2.9 ~ 3.3V DC between each terminals after 15-20 minutes
turning on the power at the first time of installation.
(ROSAHL naturally causes a relatively big rush current when the power is turned on.
But this is not abnormal.)Specifications
Model NameItems
Dehumidifying(g/day)*1
Performance
Applicable Volume(m3)*2
Terminal Voltage(V)

Power Consumption(W)*3

Dimensions(mm)*4Weight(g)Operating Temperature (deg C)
Connecting Terminal Type

M-1J1R

M-2J1R

M-3M1R

M-3J1R

M-5J1R

M-7J1R

M-10J1R

12

2.9

48

1629~ 0.125~ 0.25~ 0.35~ 0.5~1~2~4

1

1.5

2

3

6123 DC
252.5×50×16.5 67.5×50×16.5 65×62×16.5 74×58×16.5 89×84×16.5 117×105×17.5 162.5×155×17.570

85

9095

150

340580-10 to 50(+) side : TMEDN-480509-FA (NICHIFU Co.,Ltd.) or equivalent( - ) side : TMEDN-630809-FA (NICHIFU Co.,Ltd.) or equivalent

Notes*1 The initial value at the temperature of 30 deg C and humidity 60%RH.
(The dehumidifying performance will reduce during use. How much it degrades depends on theoperating environment and conditions. If any signs of abnormality are seen, early replacement isrecommended.)*2 The applicable volume is for a sealed, moisture-impermeable container, and may vary dependingon the material of the container, state of sealing and required humidity.
*3 The annual average power consumption in average condition in Japan.
*4 Dimensions show the values of H × W × D in the figure below.

Outline4 / 6RB-OP21004-B

Prohibited Substances and Recommended Materials for ROSAHL
1. Prohibited substances
The substances which adversely affect ROSAHL and harm in response to ROSAHL are as follows.
The anode side is affected mainly. Even the additives of materials may be affected.
Please evaluate enough when a new substance is adopted or a maker is changed.
Classification

Inorganic
MatterOrganic
MatterSubstance Namehydrochloric acid gas

StateNotes

gas

nitric acid gas
other corrosion gases
SOx gasNOx gaschlorine gas
sulfurous acid gas
other pollution gases
concentrated hydrochloric acidconcentrated nitric acidsubstance which produces othercorrosion gas
divalent metal ion
siloxane gas
oxime gas
lamp black
diethylamine
other amine-based gas
amide-based low molecular weightcompoundmethylene chloride
perchloroethylene
trichloroethylene
perchloroethylene
tetrachloroethylene
other chlorinated solvent
oil mist
dimethyl sulfoxide
other sulfur based organic solvent
silicone sealantsilicone greasesilicone rubber
silicone-based sealing compoundother siloxane chemical compoundpran-ace
camphorother insect repellent
paradichlorobenzene
other chlorine-based insect repellent
vapor phase inhibitor
corrosion inhibitor which is added inmaterials
cigaret tar constituent

gas
gas
gas
gas
gas
gas
gas
liquidliquid

2,6-Di-tert-butyl-4-methylphenol (BHT)

liquidliquidliquid
gas
gas
gas
gas
gas
gas, liquid
liquidliquidliquidliquidliquidliquidliquidliquidliquid
solid
solid
solid
solid
solid
solid
solid
solid
gas, liquidgas, liquid
liquid, solid

These substances produce siloxane gas.
Heat treatment (bake) is necessary to remove
low molecule siloxane of non-reaction.

liquid, solidgas, liquid

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The antioxidant which was added in packing

RB-OP21004-B

2. Recommended Materials
The recommended materials in a range understanding in us are as follows.
Classification

Material Name
Glass , Metal , Acrylic , Plastic

Frame
the material which does not include“Silicon group”
Sealing
Compound[Recommended products]
modified silicon caulk (Konishi Co., Ltd.)the material which does not include“Silicon group”

AdhesiveGasket

Notes
The acrylic and plastic resin has moisturepermeability. Please thicken the board
thickness when using them.
Do not use silicon-based sealing compounds.
In addition, about the recommendation product,
please operate ROSAHL after completelycured.
(Please avoid operating ROSAHL beforecuring.)
Do not use silicon-based adhesives.

[Recommended products]
Silex, SL220W, SL220LB(Konishi Co., Ltd.)
Silicon rubber(secondary vulcanization finished)
EPT rubber [Ethylene-propylene](single bubble)
PTFE rubber [Polytetrafluoroethylene]

About the silicon rubber, please performsecondary vulcanization by all means.
(ex. 200 deg C / 6 hours)
In addition, we don’t evaluate all silicon rubber,
EPT rubber, PTFE rubber.
Please evaluate enough when using them.

The above are just as of April 1, 2021 but not all of them. Please verify in advance and evaluate enoughwhen using our electric dehumidifier “ROSAHL”. We don’t take any responsibility or liability for any
damage or loss caused through the unknown phenomenon and the wrong usage.

Precautions in the Use for the Storage Cabinet
1. When you use ROSAHL to dehumidify into the storage cabinet, do not store volatile rust preventive orthings that organic gas volatilizes. The volatile gas which is released from goods reacted at a membrane's
anode and new harmful gas is produced.
As a result, not only it causes decrease in performance of ROSAHL, but also it might adversely affect on
goods in the storage cabinet. We cannot guarantee even if harm occurs to the stored valuables under theinfluence of new produced gas. Please evaluate enough when you use ROSAHL for the storage cabinet.
2. The maker who produces and sells storage cabinet equipped with ROSAHL should explain that enoughfor end users using the storage cabinet.

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