Technical Specifications

Ours is a policy of continuous development, we therefore reserve the right to alter specifications without prior
notification. Remeha Commercial accept no liability for any loss or damage rising from any errors or omissions
that may be inadvertently contained in this specification sheet. 
Boiler Type :
P420 - 9
Issue Date :
June 2012
TECHNICAL SPECIFICATION SHEET
Quick reference specification sheet full details can be found in the P420 series Installation/Service guide.
General Details
Corrosion resistant cast iron sectional boiler, jointed by conical nipples and ceramic rope, designed
with three passes for high efficiency and low NOx emission. Large insulated door (hinged left or right)
allowing easy access for cleaning. Powder coated enamel steel casing c/w fiberglass insulation.
All of the P420 Boiler Range are supplied un-assembled for delivery to site
CE approved. Boiler Efficiency data to 92/42-EEC
MODEL : P420
No of SECTIONS : 9
Rated Output kW :
390 - 450
Efficiency % : NCV Full load (³)
88
Weight (dry) kgs :
As per Technical Manual
Seasonal Efficiency : % GCV
82.2
(Avg)
Overall Dim WxHxD mm :
1000 x 1690 x 1950
Radiated Losses w : *
358
BURNER TYPE
Pressure Jet
Fuel Available :
Nat Gas
Oil (35sec)
Dual Fuel
Fuel Consumption:
Check burner details
43.33 Kg/hr ##
Noise levels dB(A) :
Check burner details
Min Op Gas Press mbar :
Check burner details
HYDRAULICS
Water Content ltrs :
409
Min Return Temp °C
50
Resist @ 11°C ∆t mbar :
39.7
Connection Size :
2½”
Resist @ 20°C ∆t mbar :
12
Std Operating Temp °C :
80
Nom Flow Rate @ 11° C ∆t l/s :
9.77
Max Operating Temp °C :
90
Nom Flow Rate @ 20° C ∆t l/s :
5.38
High Limit Set Point °C :
110
Min Flow Rate l/s : #
2.39
Max Op Press bars :
6
Test Press bar :
As per Assembly
Manual
FLUE
Diameter mm :
250
Flue Gas Flow kgs/hr Gas : (¹)
810
Flue Type :
Conventional
Flue Gas Flow kgs/hr Oil : (¹)
750
Chamber Resist. mbar :
1.5
Flue Gas Temperature °C : (²)
<220
ELECTRICAL
Voltage :
230.1.50
Note: 1ph burners obtain their
power supply via the boiler.
Fuse rating amps :
10Amp
3ph burners require a 3ph
supply + a 1ph to the boiler.
CONTROL OPERATION
Standard :
On / Off Thermostat
Temperature indication
L/O lamp
High limit Thermostat
Volt free run/lock indication
On/Off switch
High / Low
3 Position Switch Auto/Man/Test
10amp CB
Optional :
Hours Run Meters
Modulating(via burner)
(¹) Boiler at full output average temperature 80/60°c (70°c mean)
(²)
Boiler temperature: 80 °C, Ambient temperature: 20 °C
(³) 70°c average temperature
* Maintenance consumption refer to boiler installation/service manual
# Based on ∆t of 45°
## @ 12 bar pump pressure