Gas Boiler Pixel 25 F

Description

Wall-hung Gas Boiler Arca Pixel 25 F

The hydraulic unit is made of monofusions of brass integrated with low flow charge tap and standard bypass.
The 12-plate stainless steel water-water exchanger enables a large production of sanitary hot water at controlled temperature and a considerable resistance to calcareous deposit.

ARCA has chosen to show its components in its the catalogues in order to enhance their quality such as the brass hydraulic unit, a guarantee of long life.
The solution with motorized three-way valve, with a limited electrical consumption, allows a faster control of the antifreeze function and the use of the hot water supply function even with limited withdrawals.

Boiler management, controls, settings, self-diagnosis and security are ensured
by a state-of-the-art digital electronic display that displays all generator functions on a backlit display.

The maximization of performance and therefore the reduction of consumption, requires, in addition to intelligent electronics, the provision of an external sensor that allows in any plant condition the minimum operating temperature.

Specifications

Normal thermal power 27 kW
Normal power 25,1 kW
Efficiency 92,9%
Minimal Thermal Power 10,5 kW
Minimal Power 9,5 kW
Efficiency to reduced load Ref. PCI (30% Pn-50°C/30°C) 90,7%
Gas capacity at P methane G20 (2E+) 2,855 m3/h
Methane G25 (2ELL) 3,32 m3/h
LPG G30 (3+) 2.128 kg/h
LPG G31 (3P) 2,096 kg/h

GAS PRESSURE of G20 (2e+) Methane Net 20/25 mbar
Methane G25 (2ELL) 20 mbar
LPG G30 (3+) 29 mbar
LPG G31 (3P) 37 mbar
Smoke temperature 126,7°C
CO2 (G20) 7,7%
Warmth loss with burner working 6,6%
Heat loss to the shell (ΔT = 50°C) 0,2%
Steam capacity Nm3/h 0.3%
Volume maximum flue gas 47 Nm3/h

HEATING
Minimum Heating set point 35°C
Maximum Heating set point 90°C
Water volume in boiler 1.2 l
Water volume in expansion vessel 6 l
Expansion vessel pressure 0.7 bar
Minimum Pressure in primary circuit 0.4 bar
Maximum Pressure in primary circuit 3 bar
Max. water quantity in the installation 120 l
Heating Plant available pump head at the flow rate of Q=1000 230 mbar

SANITARY
DHW minimum set point 30°C
DHW maximum set point 60°C
Hot water continuous production AT=30°C 14.4 l/min
Hot water continuous production AT=35°C 10.3 l/min
Minimum DHW Flow rate 2.5 l/min
Maximum DHW Pressure 8 bar
Minimum DHW Pressure 0,5 bar

ELECTRICAL FEATURES
Power supply voltage/frequency 230/50 V/Hz
Absorbed electric power 120 W

HYDRAULIC CONNECTIONS
Heating connections 3/4”
DHW connections 1/2”
Gas connections 3/4”

SIZE
Height 700 mm
Depth 250 mm
Width 400 mm

DISCHARGE TUBES LENGHT
Coaxial Ø 60 / 100 mm 4 m
Split Ø 80 mm 30 m

OTHER DATA
Weight 32.6 kg
Protection level IP IP4X
Certification CE 68