CUOGHI NADER MIDI 2 User manual

A
B
C

M15-1.doc - 7 - Dehumidifier model Nader midi 2002
Description (A, B, C)
1.
2.
3.
4.
5.
Level switch
Tank pilot light (red)
Defrosting pilot light (yellow)
Humidistat
Fan
6.
7.
8.
9.
10.
Compressor
Electronic card
Temperature probe
Evaporator
Condenser
11.
12.
13.
14.
Dehydrator filter
Capillary
Humidistat knob
Air flow
Symbols used in the manual
SYMBOLS MEANING DESCRIPTION

Note Carefully follow the instructions and suggestions given.

Warning! Generic danger. Not following instructions can cause damages to the
machine, persons or things.
Introduction
The appliances of the NADER midi series are air humidifiers, the purpose of which is to remove humidity from the
environment. They are equipped with a refrigeration circuit, loaded with ecological gas R134a, fitted with an electronic
controlled defrosting system. These appliances were designed for a domestic and not industrial use.
Operating principle (C)
The appliance uses a fan (5) to suck up the air (14) to be dehumidified and pass it through the refrigerator circuit
evaporator (9). In this way the temperature of the air is lowered to below its dew point and the vapour condenses to
form drops of water that are collected in the appropriate tank. The amount of pollution in the water collected is
proportional to the amount of pollution in the environment. The air thus dehumidified is passed through the condenser
(10) that raises its temperature slightly higher than the initial value. In this way the quantity of humidity contained in the
environmental air is gradually decreased until it reaches the desired value. This means the humidity of the walls and
floor of the room, as well as the materials contained therein, is also lowered.
Defrosting (B, C)
When the room temperature drops below approximately 16°C, ice could form on the evaporator coil (9). In the
dehumidifiers of the NADER midi series the defrosting cycle is automatic, and is controlled by an electronic device (7),
that detects the presence of ice on the evaporator coil (9). The defrosting phase is signalled by the yellow pilot light (3)
on the control panel switching on; during this phase the compressor (6) stops. The duration of the defrosting cycle
depends on environmental conditions and the amount of ice that has formed on the evaporator (9).
Condensate collecting tank (B)
When the water reaches the maximum level in the condensate collection tank, the dehumidifier stops and the red pilot
light (2) on the control panel switches on. The tank can be extracted by first opening the front door of the appliance.
The tank is emptied by sliding open the door at the top of the tank. Once the tank has been emptied, it is important to
remember to close the door since it prevents the water from flowing out of the tank when the latter is moved or when the
dehumidifier is moved. To restart the appliance the tank must be put back into its lodging and this door also closed.
Besides indicating that the condensate collection tank is full, the red pilot light (2) also indicates
when the tank is missing or inserted badly. As long as the red pilot light (2) is on, the appliance
cannot operate at all.
The water can also be drained continuously by connecting a rubber hose with an internal diameter of 10 mm to the
connector found under the tank. The hose will leave the appliance through the hole on the dehumidifier bottom. Check
that the hose drains properly.
Rules for installation
The dehumidifiers of the NADER midi series are simply placed in the room to be dehumidified and started. To obtain
maximum efficiency keep to the following rules:
make sure that in the room, where the dehumidifier is installed, the conditions never exceed the working limits of the
machine (tab.2);
the room where the dehumidifier is installed must be closed;

Dehumidifier model Nader midi 2002 - 8 - M15-1.doc
the appliance must always operate in a vertical position with the four wheels turned downwards;
the dehumidifier must be placed so that the air intake and outlet grids are left free (at least 10 cm air space);
make sure that the power supply voltage corresponds to that indicated in tab. 2 and that the electrical installations
comply with the regulations in force;
it is advisable to place the dehumidifier in the coldest point of the room where humidity normally collects.
Positioning
The dehumidifier is moved on the floor on its swivel wheels. It is advisable to install the dehumidifier near an electricity
output socket.
Start-up (B)
Plug the appliance into a 230V, 50 Hz grounded socket, and turn the humidistat knob (13). The different positions of
the knob allow obtaining different degrees of dehumidification according to the data shown in tab.1:
POSITION DEGREE OF RELATIVE HUMIDITY OBTAINABLE EXAMPLE OF ENVIRONMENT
Off / /
1 between 80% and 65% Cellars and basements, uninhabited rooms
2 between 65% and 50% Rooms used by people
3 between 50% and 40% Laundry rooms, places where a reduced
degree of humidity is needed
Continuous 40% /
tab.1
Maintenance
The dehumidifiers of the NADER midi series need no particular maintenance. It is advisable to dust them and keep the
air intake and outlet grids clean. Contact your dealer if it should function badly or break down. The power supply cable
has an M type connection; in the event of damages, an original replacement cable must be used (see the exploded view
with references for spare parts).
Before doing anything on the appliance disconnect the power supply by unplugging the machine.
Storage
Keep the appliance in a room with a temperature between –25°C and +55°C.
When the appliance is still packed keep to the instructions on the box.
Do not place other heavy material on the box.
Check-up to carry out before and after a long period of inactivity
Before
Disconnect the plug and empty the condensate collection tank;
cover the machine to protect it from dust.
After
The fan must turn freely without gripping;
put the machine working following this manual’s instructions.
Disposal of the product
The machine is made of different metals; all can be recycled. Its refrigeration circuit is charged with the ecological
refrigerant R134a under HIGH PRESSURE; it also contains synthetic oil. Both the gas and the oil must not be
dispersed in the environment. For the disposal is thus necessary to call a specialized company.

M15-1.doc - 9 - Dehumidifier model Nader midi 2002
Technical Data
NADER MIDI 2 NADER MIDI 3 NADER MIDI 4
Indicative handling volume 160 m3300 m3400 m3
Condensate capacity (30°C, 80% R.U.) 13.3 L/24 hr 20.8 L/24 hr 26.8 L/24 hr
Working limit temperatures +5°C +35°C
Working limit relative humidity 40%_100%
Air Flow rate 55.6 L/s (200m3/hr) 69.4 L/s (250m3/hr) 83.3 L/s (300m3/hr)
Power supply voltage 230V, 50 Hz
Current absorption (30°C, 80% R.U.) 1.7 A 2.4 A 3.3 A
Power absorption (30°C, 80% R.U.) 285W 434W 580W
R134a refrigerating gas charge 270g 250g 270g
Refrigerating circuit maximum pressure 15.8 bar
Noise level at 1 m distance 48 dBA 52 dBA 54 dBA
Dimensions: w×h×d (mm) / weight (kg) 398×555×382 / 25.5 398×555×382 / 27.3 398×555×382 / 28.7
condensate collection tank capacity about 7 litres
tab.2