Uniflair WMF 0251 User manual

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN 1 (32)
OUTDOOR MONOBLOC AIR CONDITIONING
UNIT FOR INSTALLATION ON SHELTERS
AND PRE-FABRICATED BUILDINGS
WMA/WMF
0121- 0181 - 0251 - 0281 - 0331
0551 - 0661
OPERATION AND
MAINTENANCE MANUAL
GB
© UNIFLAIR 2000

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
2 (32) Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN
Before installing or working on the unit, read this instruction manual
carefully. Follow all instructions and safety procedures contained in
this manual and displayed on the unit
Some characteristics of special versions of these units may differ
from those described in this manual.
UNIFLAIR ITALIA S.r.l.
Via dell’Industria, 10
35020 BRUGINE (Padova) Italy
Tel. [phone]
Fax. [phone]
Internet: www.UNIFLAIR.com
E-Mail: [email protected]om
Release: 2.0 Date: 18 - 07 - 2000
Checked by:

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN 3 (32)
Contents
Page
GENERAL DESCRIPTION 4
Documentation enclosed with the unit 4
Description of the unit and intended use 4
Function limits 5
Description of main components 5
Accessories 6
Function principles 7
Free-cooling system 7
Data plate 10
START-UP AND TESTING 11
Start-up procedure 11
FUNCTION & REGULATION 12
Microprocessor control 12
Management of two units 13
Measurement and alarm devices 14
Regulation of condensation pressure 15
Setting the regulation and safety devices 16
Setting the airflow sensor 17
Setting the dirty filter sensor 17
TECHNICAL DATA 18
General characteristics 18
Electrical characteristics 20
MAINTENANCE 22
Regular checks 22
Cleaning and changing the air filter 22
Cleaning the external air pre-filter 23
Cleaning the air-cooled condenser 23
Damper maintenance – changing the motor 23
Changing the electrical heating element 24
Cleaning and changing the condensate drain tube 24
Adjusting the refrigerant charge 24
PROBLEM SOLVING 26
Temperature control 27
Humidity control 27
Fans 28
Refrigerant circuit 28
Compressors 30
Electric heaters 30
Free cooling 31
IMPORTANT: the description of the Control System and the operating logic of the unit are given in the
mP20W Control System instruction manual.

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
4 (32) Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN
Family Unit Function Model Number of Version Control
type mode Compressors System
W: wall M: monobloc F: mech.+ free. cooling C: Basic version W: mP20W
mounted A: mech. cooling only T: With electric re-heat microprocessor
W M F 066 1 T W
GENERAL DESCRIPTION
DOCUMENTATION ENCLOSED WITH THE UNIT
Every unit is supplied complete with the following documents:
•Unit instruction manual
•Microprocessor control instruction manual
•Electrical diagrams
•Spare parts list
•CE declaration listing the directives and norms to which the unit conforms
•Guarantee certificate
UNIT DESCRIPTION AND INTENDED USE
The WM is an autonomous monobloc direct expansion air conditioning unit with air-cooled condenser, designed for
the air conditioning of telephone exchanges, shelters and technological applications. The unit is pre-charged and
tested in the factory and has its own built-in condenser. Installation consists of simply fixing the unit to the wall,
connecting the air ducting and making the electrical connections.
All essential components can be inspected and removed from the front (with the exception of the damper motor in
WMF units from 0121 to 0331), in multiple installations units can therefore be fitted very close together (see
installation manual).
ACTIVE SAFETY
The control system provides monitoring and prevention functions via:
•Function status indication
•Continuous reading and display of the temperature measured by the sensors
•Indication of fault and alarm situations
•Automatic stopping of unit components in the event of risk
•Compressor management to reduce start-up frequency.
PASSIVE SAFETY
The essential functions of the units are protected against faults and potentially dangerous conditions; WM units are
fitted with:
•High and low-pressure pressostats to protect the refrigerant circuit (HP with manual re-set)
•Low airflow differential pressostat
•Dirty filter differential pressostat (optional)
•Safety thermostat on units with electric heater
•Compressor electric motor protection
•Phase sequence relay on units with 400V/3N/50Hz power supply (models 0331 to 0661).
PERSONAL SAFETY
The design and wiring of Uniflair air conditioning units conform to 73/23/CEE. The electrical panels are equipped
with an auxiliary 24V circuit and include individual short circuit protection using automatic circuit breakers. The axial
fans are protected by metal grilles.

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN 5 (32)
FUNCTION LIMITS
T outside air
T room air
T i = 40 °C
T i = 19 °C
T i = 35 °C
T e = 45 °C T e = 47 °CT e = 18 °C
Only if the condenser is fitted with the
RVC/e speed regulator
MODELS WM 0551-0661
DESCRIPTION OF MAIN COMPONENTS
SELF-SUPPORTING FRAME in 1.2 mm galvanised steel
EXTERNAL PANELS in 1.2 mm, galvanised steel with RAL9001 cream-coloured epoxy powder paint and internally
lined in self-extinguishing abrasion-resistant sound and heat insulation material. Units are also available with
aluminium external panels
FILTER in self-extinguishing material with EU2 efficiency (doc. Eurovent 4-5) fitted in rigid metal frame
SINGLE INLET RADIAL FANS in the evaporator section
AIRFLOW SENSOR for activating a low airflow alarm
COOLING COIL: hydrophilic -treated large frontal area manufactured in copper tubing mechanically expanded into
aluminium fins, stainless steel tray with flexible condensate drain tube
ELECTRICAL HEATERS (optional) with finned aluminium elements and safety thermostat for cutting off the power
supply and activating the alarm in the event of overheating
ELECTRICAL PANEL housed in a compartment isolated from the airflow and which conforms to norms 73/23/CEE
- 89/336/CEE with:
•auxiliary 24V transformer
•main switch
•magnetothermal protection
•remote command switches
SCROLL COMPRESSOR with high energy efficiency, low noise levels and built-in thermal.
FREE COOLING (WMF units): managed by the microprocessor which controls a motorised damper for the
introduction of fresh air.
REFRIGERANT CIRCUIT including:
•filter drier and flow sight glass
•thermostatic expansion valve
•high and low-pressure pressostats (HP with manual reset)
mP20W MICROPROCESSOR CONTROL: includes room, outdoor and air delivery temperature sensors
‘TORX’ anti-tamper external screws

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
6 (32) Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN
ACCESSORIES
The following optional accessories can be added to the basic version of the unit:
RVC/e: condenser fan speed regulation with SPC pressure sensor
USER TERMINAL for the setting and display of unit function parameters; to special order the terminal can be
housed inside the unit’s electrical panel on a hinged plate or a wall fitting kit can be supplied for remote installation
CLOCK CIRCUIT for the management of time and date events
LAN BOARD for the local network connection of two units
LAN & CLOCK BOARD
RS485 SERIAL OUTPUT for data transmission to a centralised supervision system
BLOCKED FILTER ALARM SENSOR consisting of a dirty filter pressostat
EU4 high-efficiency filter (replacing standard EU2 filter)
R407C REFRIGERANT (replacing standard R22)
DOUBLE ELECTRICAL POWER SUPPLY - normal function uses mains power, emergency function uses UPS
230V/1N/50Hz for the fan, microprocessor control and free-cooling damper
DOUBLE ELECTRICAL POWER SUPPLY WITH 48V DC FROM INVERTER: normal function uses mains power,
emergency function uses UPS 48V DC for evaporator fan, microprocessor control and free-cooling damper motor
DC FANS
TEMPERATURE AND HUMIDITY SENSOR (in place of standard temperature-only sensor)
SPRING-RETURN DAMPER to special order on WMF units

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN 7 (32)
FUNCTION PRINCIPLES
(basic version – mechanical cooling)
Air from the room is taken in by the recirculating fan through opening (I),
cooled by the evaporator coil and delivered into the room through opening
(M). In “T” versions, the air may be heated by the electric elements (H) before
being delivered into the room.
Fig. 1
M
I
H
FREE COOLING
(WMF UNITS)
The free cooling cycle consists of the introduction into the room of fresh air when this is sufficiently cold to absorb
the thermal load of the room. The unit is fitted with a butterfly damper and two air intakes:
•recycled air intake (on left hand diagram)
•external air intake (on right hand diagram).
A. NORMAL FUNCTION (figs. 2a and 3a)
During normal function the damper (S) is positioned to take in air only from the room (arrow on the left), closing the
external air intake.
The air is filtered (F), cooled and dehumidified in the cooling coil (E) and returned to the room by the fan (MVE).
Cooling is via the cooling cycle, starting the compressor (CP).
B. FREE COOLING (free cooling) (figs. 2b and 3b)
As soon as the external air is of a low enough temperature to maintain the temperature in the room at the desired
level, the damper (S) changes position, delivering fresh air into the room instead of recycled. During free cooling
function, the compressor is off.
C. MODULATING FUNCTION (fig. 2c and 3c)
When the outside temperature falls further, the control system therefore changes the damper position to mix fresh
and recycled air to maintain room temperature at the required level. In any case, the temperature of the air taken in
is maintained above a pre-set minimum.

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
8 (32) Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN
MINIMUM QUANTITY OF FRESH AIR
It is possible to pre-set a minimum opening position on the damper to allow the introduction of a proportion of fresh
air in any operating mode.
(a) (b) (c)
MVE
E
Q.E.
CP
F
S
MVC
MODELS WMF 0121-0181-0251-0281-0331
Fig. 2
(a) (b) (c)
CP
E
S
MVE
F
MVC
Q.E
MODELS WMF 0551-0661
Fig. 3

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN 9 (32)
INTELLIGENT FREE-COOLING
This system gives dynamic control of the free-cooling phase, maximising energy-saving performance at all times.
The result is the ability to provide much greater energy saving (and therefore economy of operation) than the
common fixed-point free-cooling systems.
The microprocessor compares the thermal load present at that moment in the air conditioned environment with the
outside temperature, calculating the optimum temperature at which to start free-cooling. In this way the temperature
at which free-cooling starts is not fixed but changes to adapt to the load conditions present at that moment in the air
conditioned environment
If required, fixed point or fixed differential free-cooling cycles can also be activated; this type of function does not
consider the heat load in the room.

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
10 (32) Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN
DATA PLATE
The data plate is in the electrical panel housing and shows:
- Unit model and serial number
- Power supply (voltage, number of phases and frequency)
- Power absorption of the unit and of the main components
-Current absorption of the unit and of the main components:
-OA (Operating current)
-FLA (Full load current)
-LRA (Locked rotor current)
- Setting values of the refrigerant circuit pressostats (HP and LP) and of the other regulation and safety devices
- Refrigerant type and refrigerant circuit charge in kg.
MODEL SERIAL No.
POWER SUPPLY
CURRENT ABSORPTION
OA FLA LRA KW TOTALI
SAFETY DEVICE SETTINGS
REFRIGERANT
Fig. 4

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN 11 (32)
START-UP AND TESTING
START-UP PROCEDURE
Having connected the power supply cables to the IG main switch as described in the Installation Manual, switch on
the power supply to the unit electrical panel.
1. - Arm the IM automatic switch
2. - (in units with double power supply) arm automatic auxiliary switch IM2 (230V/1N/50Hz from UPS)
3. -Move the main switch IG to the on position “I”
4. – Check that the yellow mains LED (on the microprocessor control board) and the user terminal display are both
on (see mP20/W control instruction manual)
5. - (for units with tri-phase power supply) if the RSF phase sequence relay intervenes; disconnect the power
supply, invert two of the phases L1, L2, L3 and continue with the start-up procedure.
WM units can be fitted with two types of RSF phase sequence relay:
a) model: CDC GZ90F33 (UNIFLAIR code MERE074X1A)
Check that the two orange mains power LEDs and the red RSF LED are on. If the red
RST LED (shown in the diagram) does not come on, disconnect the power supply to
the unit and swap two phases on the power supply cable.
b) model: CISE 131 - V2R (UNIFLAIR code MERE070X1A)
CISE 131 - V2 (UNIFLAIR code MERE072X1A)
Check that the two orange mains power LEDs and the green Sequence LED on the
RSF relay are on. If the green LED is off, disconnect the power supply to the unit and
swap two phases of the power supply cable
6. – Close the electrical panel cover and tighten the screws;
RST
SEQUENZA
POWER
7. -Start the unit by pressing the button on the control terminal; after a short delay the fan will start and the
green LED on the control panel will come on. Alternatively the unit can be started by:
- closing the contact between terminals 20 and 50 on the electrical panel if the microprocessor control is
programmed for remote control (see mP20/W instruction manual)
- the supervision system
8. - Check that the protection devices do not intervene
9. - Check that the mP20 control is not displaying an alarm;
An alarm is signalled by:
- the warning buzzer
- activation of the alarm repay and switching on of the red LED on the user terminal
- description of the alarm on the terminal display (see mP20/W instruction manual)
10. – Set the required room parameters (see mP20/W instruction manual) or set the remote control contacts of an
external control system is being used (see attached electrical diagrams); the unit components required to achieve
the set conditions (compressor or free-cooling damper) will be activated.
11. - Check that there are no unusual noises or vibrations
12. - Check that current absorption is within the limits given in the section 'Current Absorption’
13. – Check that the unit has not lost refrigerant charge. If one of the safety devices intervenes check the
evaporation and condensation pressure values with a manometer.

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
12 (32) Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN
FUNCTION AND REGULATION
MICROPROCESSOR CONTROL
(see mP20 microprocessor control instruction manual)
The control board provides the following functions:
•Control of room temperature
•Display of room relative humidity (with optional temperature and humidity sensor)
•Maximum room humidity setting which, when reached, closes the free-cooling damper and forces compressor
start-up (with optional humidity sensor)
•Management of electrical re-heat (optional)
•Management of alarms
•Management of stand-by if two or more units are connected (with LAN board)
•Alarm system with visual and acoustic signals
•Signal contacts for each type of alarm
•Programmable general alarm signal for the signalling of specific selectable alarms
•Programmable automatic re-start after a power failure
•Programmable re-start delay in multiple installations
•Compressor activation control (limits frequency of start-ups)
•Programmable control (remote control or supervision)
•Control of delivery air minimum temperature limit (WMF)
•Control of free-cooling damper position (special units)
•2 levels of password programming (setting / hardware & software configuration)
•RS422 or RS485 serial output (optional)
•Clock/calendar circuit (optional)
•Run hour counter for main components
•Service scheduling with clear information on necessary actions
•Memorisation of last 30 alarms (with date and time if optional clock circuit fitted)
•Detailed display of function mode and active components (with optional user terminal)
•Weekly on/off time bands (with optional clock circuit) for weekdays, pre-holidays, holidays
•Set-back function where the unit is in stand-by but maintains room temperature between two pre-set limits and
relative humidity below a pre-set limit (with optional temperature and humidity sensor).
•Distinct setting of heating and cooling set point
•Override function for the manual control of main components without excluding remote control.
•Optimised control algorithm which constantly monitors the temperature of the room, of the air outside and of the
delivery air for optimised management of both the direct expansion and the intelligent free cooling functions.
Free cooling can therefore start earlier and continue for longer and at higher external temperatures since it
takes into account the thermal load in the room at that moment.
•Advanced free-cooling management of two units with stand-by function to maximise energy saving.

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN 13 (32)
MEASUREMENT AND ALARM DEVICES
The safety and regulation functions of the unit are performed by the microprocessor control. The unit is equipped
with the following temperature, humidity and pressure sensors, as shown in the figure below:
RVC/e. Modulates condenser fan speed to control condensation pressure (optional).
TSR. Electric heating element safety thermostat with re-set button under the coil;
SM. Delivery air temperature sensor;
SE. External air temperature sensor;
ST-STU. Room temperature (or optional temperature and humidity) sensor. The ST sensor is installed in the unit as
shown in the diagram; the STU sensor is supplied with a 3 metre cable and must be installed in the room.
FS. Air flow sensor (differential pressostat) to detect low airflow and fan function.
PFS. Dirty filter sensor (differential pressostat).
AP-BP. Fixed setting high / low pressure switches (HP with manual re-set).
SPC. Condensation pressure sensor.
.
STU
SE
FS
PFS BP
AP
SPC
TSR
RVC/e
BACK OF UNIT
SM
ST
Fig. 5.a.
MODELS WM* 0121-0181-0251-0281-0331

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
14 (32) Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN
AP
SPC
BP
RVC/e
TSR
FS
PFS
BACK OF UNIT
ST
SM
SE
Fig. 5.b.
MODELS WM* 0551-0661
REGULATION OF CONDENSATION PRESSURE
Standard units are fitted with an On/Off pressostat.
As an alternative, condensation pressure can be
controlled by a TRIAC voltage regulator on the
condenser fan power supply. The regulator is optional
(see Function Limits) and has the code RVC/e; it is
controlled by the microprocessor as a function of the
condensation temperature read by the SPC
condensation pressure sensor.
The setting - done on the user terminal - has the
following standard values:
CUT-IN
(
default: 21,5bar
)
DIFFERENTIAL
8 bar p. COND
ON
OFF
PV
T. MIN (default: 35°C) T. MAX (default: 50°C)
Minimum speed
15%
V
PROPORTIONAL BAND T. COND
Maximum speed
100%
RVC/e
•maximum speed for 18,5 bar-r condensation
pressure (50°C saturated condensation temperature
with R22 and 47.5°C with R407C)
•minimum speed for 35°C saturated condensation
temperature, corresponding to delivery pressure of
12,7 bar with R22 and 14,5 bar with R407C
•minimum fan power supply voltage (cut-off voltage)
of 15% of mains voltage.

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN 15 (32)
Some special units can be fitted with an RVC/p pressostatic speed regulator which is not controlled by the
microprocessor.
p. MIN (default: 17bar) p. MAX (default: 21bar)
OFF PROPORTIONAL BAND p. COND
Maximum speed:
100%
RVC/p
SETTING THE REGULATION AND SAFETY DEVICES
After starting the unit make the following settings:
- Room temperature: see microprocessor control instruction manual
- Room relative humidity: see microprocessor control instruction manual;
- Dirty filter differential pressostat: see section on Setting the Dirty Filter Sensor.
Check that the safety devices are set to the values shown in the table below.
The regulation and safety devices are set in the factory and must not be changed without good reason.
.Description Intervention Differential Re-set
AP High pressure air delivery pressostat 27,5 bar --- manual
BP Low pressure air intake pressostat 2,0 bar 1,5 bar 3,5 bar
TSR Heating element safety thermostat 320 °C --- manual

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
16 (32) Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN
SETTING THE AIRFLOW SENSOR
The FS differential pressostat should intervene if the fan is not working (if the unit has one fan only) or if one of the
fans is not working (in the case of multiple fans).
The setting of the airflow differential pressostat is 1.0 mbar (100 Pa). Since the difference in pressure between the
fan intake and delivery depends on the airflow, it is necessary to set the pressostat after installation, making sure
that the contact closes when the fan is in normal operation. To set the pressostat:
•simulate a fan fault (stop the fan, or one of the fans if multiple); check that the pressostat intervenes
•if the pressostat does not intervene, gradually increase the setting until it does.
The FS differential pressostat can be set on a scale from 0.5 to 5.0 mbar (from 50 to 500 Pa).
SETTING THE OPTIONAL DIRTY FILTER SENSOR
The PFS pressostat must be set as a function of the pressure drop; this depends not only on how dirty the filter is
but also on the airflow and therefore on the setting of the fan speed regulator. The setting must be done when the
filter is clean:
- set the PFS pressostat to 1.5 mbar;
- gradually cover the surface of the air filter and check that the pressostat intervenes when the filter is about 50-
60% covered
If the pressostat does not intervene, gradually lower its setting; if it cuts in too soon, increase the setting.

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN 17 (32)
TECHNICAL DATA
GENERAL CHARACTERISTICS
This information refers to standard models and may vary for special or modified units.
MODELLO 0121 0181 0251 0281 0331 MODEL
POTENZA FRIGORIFERA- R22 COOLING CAPACITY- R22
Raffreddamento Meccanico Mechanical cooling
Ambiente: 26 °C, 40%UR;Text=35°C Room at 26 °C, 40%RH, Text=35°C
Resa frigorifera totale kW 4.1 5.6 7.7 8.5 10.0 Total cooling capacity
Resa frigorifera sensibile kW 4.1 5.6 7.7 8.5 10.0 Sensible cooling capacity
POTENZA FRIGORIFERA COOLING CAPACITY
Raffreddamento in free-cooling Free-cooling
Ambiente a 26 °C- Text=14°C Room at 26 °C- Text=14°C
Sensibile kW 5.0 5.8 8.5 8.5 9.2 Sensible
TENSIONE DI ALIMENTAZIONE V/ph/Hz 230/1N/50 400/3/50 POWER SUPPLY
COMPRESSORE FRIGORIFERO COOLING COMPRESSORS
Numero / Tipo 1 / ROTARY 1 / SCROLL Number of compressors / Type
Potenza nominale
(Ambiente a 26°C - Text=35°C) kW 0.94 1.53 1.90 2.35 2.86
Nominal power
Room at 26 °C 40%RH, Text=35°C
RISCALDAMENTO ELETTRICO (1)ELECTRICAL RE-HEAT (1)
Numero di stadi 1 1 1 1 1 Number of stages
Potenza totale kW 2,6 4 4 4 6 Total power
VENTILATORI sez. RICIRCOLO
Portata d’aria nominale l/s 344 406 622 622 742 Nominal airflow
(raffreddamento meccanico) m³/h 1240 1460 2240 2240 2670 (mechanical cooling)
Portata d’aria nominale l/s 342 397 583 583 633 Nominal airflow
(free-cooling) m³/h 1230 1430 2100 2100 2280 (free cooling)
Numero di ventilatori (evaporatore) 1 1 2 2 2 Number of fans (evaporator)
VENTILATORI sez. CONDENSANTE CONDENSER FANS
Portata d’aria nominale l/s 794 794 800 800 825 Nominal air volume
m³/h 2860 2860 2890 2890 2970
Numero di ventilatori / n. di poli
(condensatore)
1 / 6 1 / 6 1 / 6 1 / 6 2 / 6 Number of fans (condenser)
FILTRO DELL’ARIA AIR FILTER
Efficienza - filtro standard EU2 Efficiency (standard air filter)
Efficienza - filtro opzionale EU4 Efficiency (optional air filter)
Dimensioni mm 570 x 350 x 48 850 x 400 x 48 Frontal dimensions
LIVELLO di PRESSIONE SONORA (2)dB(A) 40.5 44.0 45.5 45.5 49.0 SOUND PRESSURE LEVEL (2)
DIMENSIONI E PESI DIMENSIONS AND WEIGHTS
Altezza mm 1790 1790 1940 1940 1940 Height
Larghezza mm 650 650 930 930 930 Width
Profondità mm 400 400 450 450 450 Depth
Peso (unità senza imballo) kg 135 152 190 190 210 Weight (unit without packaging)
(1) Opzionale Optional (1)
(2) In campo libero, a 5 metri di distanza frontale nelle condizioni
nominali
Free field at 5 m from front of unit under nominal conditions (2)
MODELLI WM* 0121-0181-0251-0281-0331

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
18 (32) Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN
MODELLO WMF0551 WMF0661 MODEL
POTENZA FRIGORIFERA – R22 COOLING CAPACITY – R22
Raffreddamento Meccanico Mechanical cooling
Ambiente a 26 °C- 40%UR-
Text=35°C
Room at 26 °C- 40%RH- Text=35°C
Resa frigorifera totale kW 15.8 17.5 kW Total cooling capacity
Resa frigorifera sensibile kW 15.8 17.5 kW Sensible cooling capacity
POTENZA FRIGORIFERA COOLING CAPACITY
Raffreddamento in free-cooling Free-cooling
Ambiente a 26 °C- Text=14°C Room at 26 °C- Text=14°C
Sensibile kW 17.4 17.4 kW Sensible
TENSIONE DI ALIMENTAZIONE V/ph/Hz 400/3+N/50 (*) 400/3+N/50 (*) V/ph/Hz POWER SUPPLY
COMPRESSORE FRIGORIFERO COOLING COMPRESSORS
Numero / Tipo 1 / SCROLL 1 / SCROLL Number / Type
Potenza nominale
(Ambiente a 26°C - Text=35°C) kW 4.01 4.88 kW
Nominal power
Room at 26 °C 40%RH, Text=35°C
RISCALDAMENTO ELETTRICO (1)ELECTRICAL RE-HEAT (1)
Numero di stadi 1 1 Number of stages
Potenza totale kW 6 6 kW Total power
VENTILATORI sez. RICIRCOLO
Portata d’aria nominale l/s 1270 1270 l/s Nominal airflow
(raffreddamento meccanico) m³/h 4580 4580 m³/h (mechanical cooling)
Portata d'aria nominale l/s 1200 1200 l/s Nominal airflow
(free cooling) m³/h 4310 4310 m³/h (free cooling)
Numero di ventilatori 1 1 Number of fans
VENTILATORI sez. CONDENSANTE CONDENSER FANS
Portata d’aria nominale l/s 1650 1650 l/s Nominal air volume
m³/h 5940 5940 m³/h
Numero di ventilatori 1 1 Number of fans
FILTRO DELL’ARIA AIR FILTER
Efficienza - filtro standard EU2 mm Efficiency (standard air filter)
Efficienza - filtro opzionale EU4 Efficiency (optional air filter)
Dimensioni mm 965 x 590 x 48 965 x 590 x 48 mm Dimensions
LIVELLO DI PRESSIONE SONORA (2) dB(A) 51.0 51.0 dB(A) SOUND PRESSURE LEVEL(2)
DIMENSIONI E PESI DIMENSIONS AND WEIGHTS
Altezza mm 2250 2250 mm Height
Larghezza mm 1050 1050 mm Width
Profondità mm 625 625 mm Depth
Peso (unità senza imballo) kg 300 320 kg Weight (unit without packaging)
(1) Opzionale Optional (1)
(2) In campo libero, a 5 m di distanza frontale nelle condizioni
nominali
Free field at 5 m from front of unit under nominal conditions (2)
(*) in alcune versioni, oltre all'alimentazione principale
400V/3ph+N/50Hz, può essere prevista l'alimentazione secondaria
230V/1N/50Hz (UPS).

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN 19 (32)
AIR FLOW
RECIRCULATION (1)
MODEL WM∗
∗∗
∗0121 WM∗
∗∗
∗0181 WM∗
∗∗
∗0251 WM∗
∗∗
∗0281 WM∗
∗∗
∗0331
Nominal air flow @ 0 Pa l/s 344 406 622 622 742
m³/h 1240 1460 2240 2240 2670
Air flow @ 50 Pa l/s 308 372 556 556 675
m³/h 1110 1340 2000 2000 2430
Air flow @ 100 Pa l/s 267 333 478 478 603
m³/h 960 1200 1720 1720 2170
Air flow @ 150 Pa l/s 214 286 381 381 519
m³/h 770 1030 1370 1370 1870
MODEL WM∗
∗∗
∗0551 WM∗
∗∗
∗0661
Nominal air flow @ 0 Pa l/s 1270 1270
m³/h 4580 4580
Air flow @ 50 Pa l/s 1208 1208
m³/h 4350 4350
Air flow @ 100 Pa l/s 1139 1139
m³/h 4100 4100
Air flow @ 150 Pa l/s 1067 1067
m³/h 3840 3840
(1) Without delivery and intake grilles, clean filters, no electric heater or re-heat
FREE-COOLING (1)
MODEL WMF0121 WMF0181 WMF0251 WMF0281 WMF0331
Nominal air flow @ 0 Pa l/s 342 397 583 583 633
m³/h 1230 1430 2100 2100 2280
Air flow @ 50 Pa l/s 308 372 508 508 575
m³/h 1110 1340 1830 1830 2070
Air flow @ 100 Pa l/s 258 325 422 422 506
m³/h 930 1170 1520 1520 1820
Air flow @ 150 Pa l/s 208 278 333 333 439
m³/h 750 1000 1200 1200 1580
MODEL WMF0551 WMF0661
Nominal air flow @ 0 Pa l/s 1200 1200
m³/h 4310 4310
Air flow @ 50 Pa l/s 1137 1137
m³/h 4092 4092
Air flow @ 100 Pa l/s 1071 1071
m³/h 3857 3857
Air flow @ 150 Pa l/s 1003 1003
m³/h 3612 3612
(1) Without delivery and intake grilles, clean filters, no electric heater or re-heat

OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
20 (32) Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN
ELECTRICAL CHARACTERISTICS
COMPONENTI DELL’UNITÁ UNIT COMPONENTS
50 Hz CCOMPRESSORE
COMPRESSOR MVE VENTILATORI sez. RICIRCOLO RADIAL FANS
VOLT No. kW (2) OA (2) FLA LRA VOLT No. kW OA FLA LRA
WM∗
∗∗
∗0121 230/1ph/50 10.94 4,4 8,5 32 230/1ph/50 10,13 0,6 0,67 1,45
WM∗
∗∗
∗0181 230/1ph/50 11.53 7,1 11,4 47 230/1ph/50 10,23 1,0 1,11 2,22
WM∗
∗∗
∗0251 230/1ph/50 11.90 9,0 13,6 61 230/1ph/50 20,13 0,6 0,67 1,45
WM∗
∗∗
∗0281 230/1ph/50 12.35 11,2 15,3 76 230/1ph/50 20,13 0,6 0,67 1,45
WM∗
∗∗
∗0331 400/3ph/50 12.86 5,1 6,6 46 230/1ph/50 20,23 1,0 1,11 2,22
WM∗
∗∗
∗0551 400/3ph/50 14.01 7.8 10.0 66 230/1ph/50 10.70 3.2 3.56 7
WM∗
∗∗
∗0661 400/3ph/50 14.88 8.6 11.4 74 230/1ph/50 10.70 3.2 3.56 7
MVC VENTILATORI sez. CONDENSANTE
CONDENSER FANS RR RESISTENZE ELETTRICHE (opzionali) ELECTRICAL HEATERS (optional)
VOLT No. kW (2) OA (2) FLA LRA VOLT No. kW OA
WM∗
∗∗
∗0121 230/1ph/50 10,14 0,5 0 0 230/1ph/50 21,3 5,6
WM∗
∗∗
∗0181 230/1ph/50 10,14 0,5 0 0 230/1ph/50 22.0 8,7
WM∗
∗∗
∗0251 230/1ph/50 10,14 0,5 0 0 230/1ph/50 22.0 8,7
WM∗
∗∗
∗0281 230/1ph/50 10,14 0,5 0 0 230/1ph/50 22.0 8,7
WM∗
∗∗
∗0331 230/1ph/50 20,09 0,4 0 0 230/1ph/50 23.0 8.7
WM∗
∗∗
∗0551 230/1ph/50 10.34 1.5 2,56 7400/3ph/50 16.0 8.7
WM∗
∗∗
∗0661 230/1ph/50 10.34 1.5 2,56 7400/3ph/50 16.0 8.7
UNITÁ COMPLETE COMPLETE UNITS
SENZA RESISTENZE
WITHOUT EL. HEATERS
RAFFREDDAMENTO MECCANICO
MECHANICAL COOLING
CICLO DI FREE-COOLING
FREE-COOLING CYCLE
mm² FUS VOLT kW L1 L2 L3 VOLT kW L1 L2 L3
WM∗
∗∗
∗0121 C 1,5 30A 230/1ph/50 1.21 5.5 0 0 230/1ph/50 0.13 0.6 0 0
WM∗
∗∗
∗0221 C 1,5 30A 230/1ph/50 1.9 8.6 0 0 230/1ph/50 0.23 1.0 0 0
WM∗
∗∗
∗0251 C 2,5 40A 230/1ph/50 2.30 10.7 0 0 230/1ph/50 0.26 1.2 0 0
WM∗
∗∗
∗0281 C 2,5 40A 230/1ph/50 2.75 12.9 0 0 230/1ph/50 0.26 1.2 0 0
WM∗
∗∗
∗0331 C 1,5 30A 400/3ph/50+N 3.49 7.9 5,1 5,1 400/3ph/50+N 0.46 2.0 0 0
WM∗
∗∗
∗0551 C 440A 400/3ph/50+N 5.05 12.5 7.8 7.8 400/3ph/50+N 0.70 3.2 0 0
WM∗
∗∗
∗0661 C 440A 400/3ph/50+N 5.92 13.3 8.6 8.6 400/3ph/50+N 0.70 3.2 0 0
CON RESISTENZE
WITH EL. HEATERS
RISCALDAMENTO ELETTRICO
ELECTRICAL HEATING
DEUMIDIFIC. & POSTRISC. ELETTRICO
DEHUMIDIFICATION & ELECTRIC REHEAT
mm² FUS VOLT kW L1 L2 L3 VOLT kW L1 L2 L3
WM∗
∗∗
∗0121 T 440A 230/1ph/50 2.73 11.8 0 0 230/1ph/50 3.81 16.7 0 0
WM∗
∗∗
∗0221 T 440A 230/1ph/50 4.23 18.4 0 0 230/1ph/50 5.90 26.0 0 0
WM∗
∗∗
∗0251 T 650A 230/1ph/50 4.26 18.6 0 0 230/1ph/50 6.3 28.1 0 0
WM∗
∗∗
∗0281 T 650A 230/1ph/50 4.26 18.6 0 0 230/1ph/50 6.75 30.3 0 0
WM∗
∗∗
∗0331 T 2,5 40A 400/3ph/50+N 6.46 10.7 8.7 8.7 400/3ph/50+N 9.49 16.6 13.8 13.8
WM∗
∗∗
∗0551 T 440A 400/3ph/50+N 6.70 11.9 8.7 8.7 400/3ph/50+N 11.05 21.2 16.5 16.5
WM∗
∗∗
∗0661 T 440A 400/3ph/50+N 6.70 11.9 8.7 8.7 400/3ph/50+N 11.92 22.0 17.3 17.3
kW kW Potenza Nominale (1) Nom. Absorbed Power (1)
OA AAssorbimento nominale (1) Operating Current (1)
FLA AAssorbimento massimo (1) Full Load Current (1)
LRA ACorrente di spunto (1) Locked Rotor Current (1)
(1) per elemento (1) each Element
(2) Ambiente: 26°C/40%UR - Test.: 35°C (2) Room at: 26°C / 40% - Text.: 35°C
L1-L2-L3 A Assorbimento nominale per fase Operating Current per phase
mm² mm² Sez. cavo di alimentazione consigliata Supply Wiring Section suggested
FUS A Fusibile di linea consigliato Line Back-up Fuses suggested