2x1

THE PATENT
2x1 by Galletti: Evolution in air conditioning
Only someone who has been designing and manufacturing heating and air conditioning units for 45 years could have conceived a product which transcends
the limits of existing technology.
2x1 is an indoor unit for hydronic heating and cooling systems which combines two operating modes in a single unit.
Thanks to an exclusive patented design, 2x1 can function as a heater without the aid of a fan, exploiting instead the principle of natural convection.
In summertime 2x1 offers the advantages of the best fan coil units, cooling, dehumidifying and filtering the air inside the room.
The exclusive patent combines 2 different operating modes in a single unit:
2 different air flow routes inside the unit and 2 distinct heat exchangers make it possible to switch over from natural convection heating to ventilated cooling
or heating.
Heating: 3 operation mode, 5 thermal emission levels:
> 1st level - convection heating mode, fan off, flap open. The thermostat
controls the room temperature by acting on the valve (optional), which
interrupts the flow of water. The unit can be shut down immediately by
positioning the air outlet flap in the closed position.
> 2nd level - convection heating mode, fan speed set on extra low, flap
open. The thermostat controls the room temperature by acting on the fan
and valve (optional), which interrupts the flow of water.
> 3rd /4th //5th level - fan coil mode, fan speed on low, medium or high, flap
closed. The thermostat controls the room temperature by acting on the
fan and valve (optional), which interrupts the flow of water.
COOLING: 1 OPERATING MODE, 4 LEVELS OF COOL AIR DELIVERY
> 1st /2nd /3rd /4th level - fan coil mode, fan speed set on EXTRA-LOW, low,
medium or high, flap closed.
The thermostat controls the room temperature by acting on the fan and
valve (optional), which interrupts the flow of water.

CONSTRUCTIVE FEATURES
> CABINET WITH A REFINED DESIGN
- Front panel made of sheet steel, colour RAL9010. The front panel
incorporates an exclusive air flap which activates the convection heating
mode. The flap is opened and closed manually.
- Side panels manufactured from UV-stabilised ABS to maintain the colour
intact over time.
- Upper grill made of ABS (UV stabilised), adjustable louvers and flap.
The flap features a microswitch that automatically shuts down the unit
when the flap itself is closed. The side doors provide access to the
control panel and compartment housing the plumbing connections.
The doors may be secured by screws to prevent opening.
> HEAT EXCHANGERS
2X1 incorporates 2 heat exchangers for 2 distinct operating modes.
- 4-row convector exchanger made up of copper tubing and aluminium
fins secured to the tubing by mechanical expansion, complete with
brass manifolds and air vent valve. The wide spacing between fins
optimises the draught effect during natural convection.
- Fan coil exchanger, made up of copper tubing and high-efficiency
aluminium fins submitted to a hydrophilic surface treatment, secured
to the tubing by mechanical expansion. The exchanger comes
complete with air vent valves.
- The heat exchangers are normally connected in series, so that the 2x1
unit will be ready for installation in 2-pipe systems.
By removing the connecting pipe, 2x1 can be immediately converted
for installation in a 4-pipe system, where the convector exchanger will
be connected to the heating circuit and the fan coil exchanger to the
cooling circuit.
- The plumbing connections are normally provided on the left side but
may be switched over to the other side (180°) during unit installation.
> FAN ASSEMBLY
Including centrifugal fans with staggered airfoil-shaped blades,
manufactured from anti-static ABS.
The fans are housed in a low-noise ABS volute distinguished by a compact,
high-efficiency profile.
Four-speed electrical motor, mounted on vibration damping couplings,
directly connected to the fans, with permanently activated capacitor and
winding thermal protection .
> BEARING STRUCTURE
Bearing structure built from galvanised sheet steel of adequate thickness,
insulated by means of Class 1 self-extinguishing panels, supplied with an
installation kit (wall screws).
A support terminal board for electrical connections is located on the
bearing structure, on the opposite side of the plumbing connections.
> AIR FILTER
Honey-comb polypropylene washable air filter, mounted on a galvanised
sheet frame protected by a net, easily removable for maintenance
operations. The filter may be secured to the unit by means of screws.
> ACCESSORIES
- Speed switch
- Microprocessor panel for automatic control of the unit and the
connection to the ERGO control system
- Base support panels which conceal the pipes leading up from the floor
- Water flow regulating valves
- BIOXIGEN ionisation and purification system

PERFORMANCE
COOLING - 2 PIPE SYSTEMS
Tbs1 Air intake temperature (dry bulb)
Tbu1 Air intake temperature (wet bulb)
Tw1 Inlet water temperature
Tw2 Water outlet temperature
Vr Fan speed:
max maximum
med medium
min minimum
PFT Total cooling capacity
PFS Sensible cooling capacity
Qw Water flow rate
Δpw Pressure drop, water side
NOTE: FRONT FLAP ALWAYS CLOSED

COOLING - 4 PIPE SYSTEMS
Tbs1 Air intake temperature (dry bulb)
Tbu1 Air intake temperature (wet bulb)
Tw1 Inlet water temperature
Tw2 Water outlet temperature
Vr Fan speed
max maximum
med medium
min minimum
PFT Total cooling capacity
PFS Sensible cooling capacity
Qw Water flow rate
Δpw Pressure drop, water side
NOTE: FRONT FLAP ALWAYS CLOSED

HEATING - 2 PIPE SYSTEMS
Tbs1 Air intake temperature (dry bulb)
Tw1 Inlet water temperature
Tw2 Water outlet temperature
Vr Fan speed
max maximum
med medium
min minimum
PT Heating capacity
Qw Water flow rate
Δpw Pressure drop, water side

HEATING - 4 PIPE SYSTEMS
Tbs1 Air intake temperature (dry bulb)
Tw1 Inlet water temperature
Tw2 Water outlet temperature
Vr Fan speed
max maximum
med medium
min minimum
PT Heating capacity
Qw Water flow rate
Δpw Pressure drop, water side

SOUND LEVEL
Vr Fan speed
3=maximum
2=medium
1=minimum
Lw Sound power level by octave band, not weighted
LwA Total sound power level, weighted A
LpA Total sound pressure level, weighted A, measured in an open field, at a distance of 1 m, with a directivity factor of 4