Ebac DD400 User Manual

Drawing : - TPC 348
Issue : - 7
Date : - 10/12/13

DD400

INDUSTRIAL DEHUMIDIFIER

OWNER’S MANUAL

www.eipl.co.uk

Page 1 of 15

Drawing : - TPC 348
Issue : - 7
Date : - 10/12/13

DD400

PACKAGE CONTENTS

Item Description Quantity

10500SS-US Dehumidifier 1

3033807 Free plug 1

TPC348 Manual 1

Page 2 of 15

Drawing : - TPC 348
Issue : - 7
Date : - 10/12/13

UNPACKING

Carefully remove the DD400 dehumidifier unit from its transit box and visually
check for signs of transit damage. If there is evidence of damage DO NOT
attempt to operate the unit, call your supplier for advice. Do not discard the
packing, it will be useful when transporting the dehumidifier unit in the future.

INTRODUCTION

Dehumidifiers remove moisture from the air that is circulating through the unit.
The resulting reduction of relative humidity helps prevent rust, rot, mould,
mildew and condensation within the room, or other enclosed spaces where
the dehumidifier is used.
The DD400 is of the desiccant wheel type designed to dry air by passing a
large volume of air, the “process” air through a slowly rotating Silica gel rotor.
Silica gel is a hygroscopic material that absorbs moisture direct from the air.
As the air passes through the rotor the humidity of the air is reduced, whilst
the moisture content of the rotor is increased. A smaller volume of air, the
reactivation air, is heated by an internal heater and passes through a portion
of the rotor in the opposite direction. As this heated air passes through the
rotor it will “reactivate” it by removing the moisture content from the silica gel
material. The reactivation air will leave the humidifier as warm, moist air and
must be vented to outside of the building.

Continuous circulation of the room air through the dehumidifier unit gradually
reduces the relative humidity in the room.

The DD400 dehumidifier is a robust, compact unit designed to control the
humidity in the enclosed space in which it is placed. The casing is fabricated
from Stainless Steel 304 and has been designed for the exacting conditions
which can prevail in offices, shops, houses, restaurants, public houses etc. It
combines lightness and compactness with high reliability and strength. Carry
handles are provide to contribute to its portability.

The unit is thermally protected and will switch off if the maximum operating
temperature of 40ºC is exceeded.

The dehumidifier has two separate filters. One in the “process” air inlet and
one in the “reactivation” air inlet, used to clean the air entering the
dehumidifier.

Page 3 of 15

Drawing : - TPC 348
Issue : - 7
Date : - 10/12/13

SPECIFICATIONS

M

ODEL

H

EIGHT

W

D

: DD400

: 420mm (16.5”)

IDTH

: 400mm (15.75”)

EPTH

: 540mm (21.25”)

W

EIGHT

D

RY AIRFLOW

W

ET AIRFLOW

P

OWER SUPPLY

P

F

D

EHUMIDIFICATION CAPACITY

(

AT

27°C

AND

60% RH)

N

: 27 Kg (59.5 lbs)

: 334 M³/

: 202 M³/

HR

HR

: 220V, 1 ph, 60Hz

OWER

INISH

1.8 kW (max)

: Stainless steel 304

33.8 l/day (71.5 ppd)

OISE

67dB(A)

(197

(119

CFM

CFM

)

)

Page 4 of 15

Drawing : - TPC 348

-

WARNING

Issue : - 7
Date : - 10/12/13

INSTALLATION

POSITIONING:

The DD400 is designed for indoor use. Position the dehumidifier unit in the
center of the room to be conditioned if at all possible.

NOTE: Both the air inlets and outlets of the dehumidifier unit must have clear
space around them and not be obstructed in anyway.

DUCT CONNECTION

The wet air outlet from the dehumidifier must be exhausted to outside of the
room being dried by means of a suitable duct. All duct connections to the
dehumidifier have been designed for connections to standard size ducts.
The duct should be as short as possible to reduce the risk of condensation of
the wet air. The duct should slope downwards away from the unit to stop any
condensed water from flowing back into the unit.

The dry air outlet is also provided with a means of attaching a duct. This can
be used to direct the air towards more severe damp patches.

WIRING:

THIS APPLIANCE MUST BE EARTHED

-

IMPORTANT – The wires in the mains lead are coloured in accordance with
the following code:

GREEN…………….…………EARTH
WHITE………………………...NEUTRAL

BLACK.....…………………….LIVE

If the supply cord is damaged it must be replaced by qualified Ebac Industrial
Products Ltd personnel or other similar qualified persons in order to avoid
hazard

.

Page 5 of 15

Drawing : - TPC 348

0

1

M

A

Issue : - 7
Date : - 10/12/13

OPERATION

The electrical controls are located on the front of the unit. They are:

• ON / OFF Switch

Dehumidifier OFF

Dehumidifier ON

• Humidity Switch

Dehumidifier in continuous operation

Dehumidifier operation by means of an external
humidistat

• An ammeter is provided to display the current used by the unit.

• An hour counter is provided to display the total time the unit has been

in operation

• A socket is provided for connection of a external humidistat

To start the dehumidifier, turn the On / Off switch to position 1.
Turn the humidity switch to position M.
After a slight delay the fans will operate – air can be felt blowing from the air
outlets and the heater will come on.
The unit will operate continuously at this setting.

Note. The DD400 is controlled by an electronic circuit board and uses dual
PTC (positive temperature coefficient) heater technology to provide the heat
necessary to “reactivate” the rotor. To ensure safe start up, the heaters are
switched on in stages – the first heater is switched on at start up and the
remaining heater switched on after 10 seconds.
At switch on, the ammeter will initially show a higher current for a few
seconds, prior to settling to a steady value. This is normal. After 10 seconds
the ammeter will again show an increased value as the second heater is
switched on. This is normal.

If an external humidistat control is fitted, turn the humidity switch to position A.
Depending on the setting of the humidistat, the dehumidifier may switch off as
the relative humidity in the room decreases. As the humidity increase the unit
will automatically switch back on.

The Humidistat plug supplied should be wired using pins numbered 1 & 2.
Pin 3 is not required. See diagram 5010307 at back of manual.

Page 6 of 15

Drawing : - TPC 348
Issue : - 7
Date : - 10/12/13

AIR MOVING SYSTEM:

The DD400 is a dual fan system with dedicated fans for the “Process” air and
“Regeneration” air flows. As the air passes over the rotor, it will be heated as
a result of the regeneration cycle. The air leaving the unit will be hotter than
the air entering

During normal operation some parts of the dehumidifier may become hot. This
is normal.

HIGH TEMPERATURE CUT OUT:

The DD400 dehumidifier has been designed to work in ambient conditions of

-20ºC to +40ºC. Should the temperature in the room become excessive an
overheat protector will operate, switching off the PTC heaters. The fans and
drive motor will continue to operate. This is a manual reset device. Prior to
resetting the protector, check that the dehumidifier is installed correctly and
the ambient temperature does not exceed 40°C.

See repairs section for details on resetting device.

DEHUMIDIFICATION CAPACITY

Approximate capacity in Kg/h at different inlet process air temperature and
relative humidity (%)

Dehumidification Capacity Kg/h

2.0

80 % RH

1.5

1.0

0.5

60 % RH

40 % RH

0.0

-10 0 10 20 30

Process Air Temperature (°C)

Page 7 of 15

Drawing : - TPC 348
Issue : - 7
Date : - 10/12/13

SAFETY

-WARNING-

♦ DO NOT ALLOW CHILDREN TO PLAY WITH OR AROUND THE

UNIT. ENSURE THE UNIT IS INACCESIBLE TO CHILDREN
WHEN NOT ATTENDED.

♦ DO NOT USE THIS UNIT IN AN ENVIRONMENT CONTAINING

FLAMMABLE FUMES

♦ DO NOT USE THIS UNIT IF THE CABINET OR POWER CORD IS

DAMAGED

♦ DO NOT INSERT OBJECTS INTO ANY OF THE GRILLES ON

THE MACHINE

♦ DO NOT COVER OR OBSTRUCT AIRFLOW FROM THE

GRILLES

♦ DO NOT OPERATE THE UNIT WITH THE COVERS REMOVED

♦ DO NOT ATTEMPT ANY REPAIRS SHOULD THE UNIT FAIL TO

OPERATE

♦ DO NOT STAND ON THE UNIT

♦ DO NOT LIFT THE UNIT WHEN SWITCHED ON

♦ DO CHECK THE PLUG ON THE EQUIPMENT MATCHES THE

SUPPLY

♦ DO USE THE UNIT FOR THE PURPOSE FOR WHICH IT WAS

DESIGNED

♦ DO ENSURE THE POWER CORD AND SUPPLY IS EARTHED

CORRECTLY

♦ DO USE A RESIDUAL CURRENT DEVICE “RCD” WHERE

POSSIBLE

♦ DO KEEP THE UNIT DRY. NEVER USE A HOSE OR PRESSURE

WASHER TO CLEAN THE UNIT.

Page 8 of 15

Drawing : - TPC 348

WARNING:

Issue : - 7
Date : - 10/12/13

ROUTINE MAINTENANCE & REPAIR

To ensure continued full efficiency of the dehumidifier, maintenance
procedures should be performed as follows:

ENSURE THAT THE POWER CORD TO THE MACHINE HAS

BEEN DISCONNECTED BEFORE CARRYING OUT ROUTINE

MAINTENACE.

SWITCH OFF THE DEHUMIDIFIER APPROXIMATELY 15

MINUTES PRIOR TO REMOVING ANY PANELS, ALLOWING

THE HEATER TO COOL DOWN

• We recommend that the filters are checked at least once a month.
Intervals for cleaning or replacement of filters will depend on the
installation

• Never operate the dehumidifier without the filters, as the rotor can be
damaged by dust.

To carryout the following, it is necessary to remove the top cover panel.

This machine should be serviced by qualified Ebac Industrial Products Ltd
personnel or other persons having technical competence in servicing
electrical equipment following the instructions in this Service Manual.

• The rotor is maintenance free. However, should it be necessary to
clean the rotor, compressed air should be used to carefully blow dirt
from the rotor.

• The PTC heaters are maintenance free. However should it be
necessary to clean the heaters, compressed air should be used to
carefully blow dirt from the heaters.

• Check that the fans are firmly secured and that the fan rotates freely.

• Check all wiring connections.

• Check the belt tensioning at regular intervals. Adjust when needed by

loosening the four bolts holding the drive wheel and rotating the drive
motor until correct tension is achieved.

• The overheat protector is located inside the unit, towards the front,
near the rotor. To reset this device press the red button.

• Should an electrical component fail, consult the Factory Service Center
to obtain the proper replacement part.

Page 9 of 15

Drawing : - TPC 348

Low current

Issue : - 7
Date : - 10/12/13

I

F ANY OF THE PRECEDING PROBLEMS OCCUR, CONTACT THE EBAC

I

NDUSTRIAL PRODUCTS LTD SERVICE CENTER PRIOR TO CONTINUED

OPERATION OF THE UNIT TO PREVENT PERMANENT DAMAGE

TROUBLESHOOTING

S

YMPTOM

C

AUSE

R

EMEDY

.

Little or no

dehumidification

capacity

Dehumidifier does

not start

Rotor does not

rotate

No Dry or Wet Air

Airflow

Filter clogged

No regeneration heat Check PTC / OHP

Reduced airflow Check fans / duct

No rotation of Rotor Check belt tension / drive motor

Air leakage Check sealing

No power Check fuse

Correct switch setting Check Auto / Manual switch

Loose electrical wiring

Drive belt slipping Check belt tension

Drive belt broken Replace drive belt

Rotor jammed Check centre shaft, rim of rotor

Drive motor faulty Check supply /Replace motor

Filter clogged Clean or replace filters

Fan faulty Check supply / fan

Ducts blocked Check duct for obstruction

Clean or replace filters

Check wiring diagram - fault

find & repair

displayed on

ammeter

Noisy

Low reactivation airflow Check air path for restriction

PTC faulty Check PTC / OHP

Fan loose Check fans secured firmly

Loose fastenings Tighten all fastenings

Page 10 of 15

Drawing : - TPC 348
Issue : - 7
Date : - 10/12/13

SPARE PARTS LIST

D

ESCRIPTION

Process Air Fan Motor 3040251

Capacitor for Process Air Fan Motor 3030835

Process Inlet Filter 2050029

Regeneration Air Fan Motor 3040250

Capacitor for Regeneration Air Fan Motor 3030834

Regeneration Inlet Filter 2050030

Drive Motor 3040259

Capacitor for Drive Motor 3030859

Pulley 3050552

Pulley Belt 3050551

P

ART NUMBER

PTC Heater 3031625

Overheat Protector 3477026

Desiccant Wheel 3020706

PCB Controller 1619600

Mains Cable 3035148

On / Off Switch 3030557

Auto / Manual Switch 3030522

Ammeter 3180101

Hour Counter 3030796

Humidistat Socket 3033806

Humidistat Plug 3033807

Spare parts available online

www.EIPLDIRECT.com

Page 11 of 15

Drawing : - TPC 348
Issue : - 7
Date : - 10/12/13

Page 12 of 15

Drawing : - TPC 348
Issue : - 7
Date : - 10/12/13

Page 13 of 15

Drawing : - TPC 348
Issue : - 7
Date : - 10/12/13

Page 14 of 15

Drawing : - TPC 348

UK Head Office

American Sales Office

German Sales Office

Issue : - 7
Date : - 10/12/13

Ebac Industrial Products Ltd

St Helens Trading Estate

Bishop Auckland

County Durham

DL14 9AD

Tel: [phone]

Fax: [phone]

www.eipl.co.uk

[e-mail]

Ebac Industrial Products Inc

700 Thimble Shoals Blvd.
Suite 109, Newport News

Virginia, 23606-2575

Tel: [phone]

Fax: [phone]

www.ebacusa.com

[e-mail]

USA

Page 15 of 15

Ebac Industrial Products Ltd.

Gartenfelder Str. 29-37

Gebäude 35

D-13599, Berlin

Germany

Tel: [phone]

Fax: [phone]

www.eip-ltd.de

[e-mail]