Fral FDK54, FDK70, FDKA100.1 Use And Maintenance Manual

M.FDK54-05 UK Manual 26/09/2017

DEHUMIDIFIERS

FDK54

USE AND MAINTENACE MANUAL

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M.FDK54-05 UK Manual 26/09/2017

1. SAFETY WARNINGS

 The FDK54 Series Dehumidifier must always be connected using the grounded electrical connection as

required from all electrical appliances. The warranty is voided and all responsibility for the operation is
born by the owner if non-grounded wiring is utilized.

 The FDK54 Dehumidifiers must only be maintained and serviced by a qualified technician.
 The FDK54 Dehumidifiers are intended only for operation when oriented with the unit sitting on its feet

and level. Any other orientation could cause water to come in contact with the electrical components.
Remove plug before moving dehumidifier. If any water may have spread throughout unit, the unit should
be opened and allowed to dry thoroughly before reconnected to electric and restarting.

 For proper operation, neither the inlet or discharge should be positioned against a wall. The inlet

requires a minimum of 12” clearance and the discharge needs a minimum of 24” clearance.

 For proper diffusion of air throughout the room, the dehumidifier should be positioned with the sides

against a wall and the inlet and discharge perpendicular to the wall.

 Do not insert any objects into the inlet or discharge. If service is required, call a qualified technician. All

work on unit should be down with the unit “off” and unplugged.

 Do not use water to clean unit exterior. Only use a damp cloth with unit unplugged.
 Do not use unit as shelf or device to hang clothes. This could cause damage to unit.
 The inlet filter generally needs cleaned once per month. Check unit on a weekly basis to ensure that

more frequent cleaning is not required.

Identification:

For future reference, write down the model, serial number, date of purchase and use this information whenever
corresponding concerning your dehumidifier.

Model Number
Serial Number _
Date of Purchase _

Warning

115 Volts AC may cause serious injury from electric shock.

1. Disconnect electrical power before servicing

2. Plug unit only into grounded electrical outlet

3. Do not use extension cord

4. Do not use plug adapter

Power Supply:

115V, 60 Hz

AC Only 1 Phase
Outlet Requirement: 3-Prong
Circuit Protector: Only compressor thermal and overload relay protector
Circuit Breaker Fuse on PCB supply

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M.FDK54-05 UK Manual 26/09/2017

2.

DESCRIPTION OF THE MACHINE

Functioning

This dehumidifier is a refrigerating cycle dehumidifier: its functioning is based on a physical principle according
to which the air, coming into contact with a cooled surface, wets the surface by covering it with humidity in the
form of condensed drops, or ice with low ambient temperature. What really happens is that a refrigerating
machine maintains in a refrigerated state the coil through which is conveyed the incoming air that, in this way, is
cooled and dehumidified. Then the air, passing through a warm heat-exchanger, heats up and returns in the
room dehumidified and at a slightly higher temperature.
The FDK54 Dehumidifier is a refrigerating machine which utilizes its Electronic Board for Room Humidity
control and Defrosting Device control. When the relative humidity goes above the selected set point, the
dehumidifier will energize. Air, moved by an electric fan, is drawn across an evaporator coil. The evaporator
coil is cooler than the dew point of the air so moisture will condense out of the air.
Air is then reheated through the condenser coil and distributed back into the room at a little bit higher
temperature and lower Relative Humidity.

If the room temperature is lower than about 32°F, the condensed moisture become ice; In this case every
roughly 30 minutes, a defrost device allows, tanks a Solenoid Valve, hot gas supplied by the compressor enter
the evaporator melting the ice.

3.

INSTALLATION

The area to be controlled should be sealed with a vapor barrier. If installed in a crawlspace, all vents should be
sealed.



Place dehumidifier on level surface

CAUTION

– Once unit is positioned, if the machine didn’t remain always in vertical position, wait minimum 5
hours before turning the unit “on.” The Electronic board manages the compressor start and stop to prevent the
compressor starts too close.



Route drain line (3/4” ID tubing) to drain condensed water outside of the area.



Plug unit into 10 amp grounded outlet.



To operate unit, press Power key until unit energizes.

o Confirm compressor is running and allow to run for minimum of 15 minutes

 If under 70°F, a layer of ice will form on evaporator coil
 If over 70°F, a layer of frost or water droplets will form on coil



After you’ve confirmed satisfactory operation of unit, humidistat should be set at desired position for
automatic operation.

NOTE

: Humidistat settings are approximate only. For critical applications, you may want to confirm actual

settings with a psychrometer and adjust according.

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M.FDK54-05 UK Manual 26/09/2017

3.

CONTROL

Signalling panel

Units are provided with signalling light panel that indicates unit operational status. Below is reported a brief
description of their meaning.

Control panel

The Electronic card with microprocessor, control many functions:

Power LED

; it’s on when the machine is in the ON state.

Alarm LED

; it’s on when an alarm comes on. It turns off if the alarm is reset.

Working LED

; the LED is on when the compressor is running, blinks when the dehumidifier is
waiting to restart or is in defrost. It’s switched off when, in the ON state, the set of desired
humidity has been reached.

ON/OFF function

; plugged into the outlet (with ground wire!), the display turns on and shows the
relative humidity in the room.
The machine is in the OFF state when the Power LED is off. It’s in the ON state when the Power LED
is on.
When OFF, to switch on the dehumidifier, simply press the POWER key and depending on the
relative humidity set the machine starts working.
When the machine reaches the level of required moisture goes into stand-by mode: automatically
stops but remains in the ON state (POWER LED on).
If the humidity goes above the set point the dehumidifier starts again.
When ON to put the dehumidifier in OFF just press the POWER button (the display continues to
indicate the humidity in the room).
Note: putting the machine OFF and immediately ON, the compressor does not start immediately and
the Run led starts to flash. After a time of 210 seconds the machine restarts.

HUMIDITY/TEMPERATURE SET function

; press one of the SET-/ +: the display starts flashing to
indicate the humidity set; continuing to press SET-/ + you can bring to the set of required moisture
(from 30% to 80%). After 4 seconds the display stops flashing and the new set of moisture is
detected by the control unit.
It’s possible to make the machine works regardless of the degree of moisture holding SET- until the
message "Cont" appears.

HOUR COUNTER

: to show on the display the machine operating time push switch HOURS.