Technical Description; General Description; Technical Specifications - REMEHA P 420 Installation And Service Manual

3 Technical description

3.1 General description

The boilers of the P 420 range are pressurised hot water boilers
designed for connecting to a flue pipe which require a separate
automatic fuel-oil or gas burner.
The useful power of P 420 boilers is between 250 and 700 kW.
Boiler with control panel, which may be fitted with an optional
Rematic 2945 C3 control unit for heating only or heating and
domestic hot water production.

3.2 Technical specifications

Maximum operating pressure: 6 bar
Boiler thermostat setting: 30 to 90°C
Maximum operating temperature: 100°C
Boiler
Useful output
Power input
Number of sections
Water content
∆ T = 10K
∆ T = 15K
Water resistance
∆ T = 20K
Pressure in the furnace for nozzle pressure =
(1) (3) (2))
0
(1) (3) (2)*
Smoke temperature
Fuel oil
Mass flue gas flow
(1) (2)
rate
Gas
Diameter, combus-
tion chamber
Width, combustion
chamber
Combustion chamber
Depth, combustion
chamber
Volume
Maintenance con-
à 50°C
sumption*
Shipping weight
*Maintenance consumption: total heat emission when the burner is
off as a percentage of the nominal input power when the difference
between the mean boiler temperature and the room temperature is
30 K.
(1)
Nominal operation (top boiler power)
)
(2
CO = 13.1 to 13.5% with fuel oil and 9.5% with natural gas.
2
(3)
Boiler temperature: 80 °C - Ambient temperature: 20 °C
16/03/2016 - 300016839-03
P 420-8 P 420-9
kW 300-390 390-450
kW 329-434 429-502
8 9
l 366 409
31 48
mbar 14 21
8 12
mbar 1.1 1.5
°C < 220 < 220
650 750
Kg/h
700 810
mm 530 530
mm 638 638
mm 1183 1343
3
0.310 0.354
m
W 315 358
kg 1470 1650
P 420
P 420-10 P 420-11 P 420-12
450-540 540-600 600-670
495-599 594-670 661-751
10 11 12
452 495 538
80 101 130
36 45 58
20 25 33
2.0 2.5 2.5
< 220 < 220 < 220
900 1000 1116
972 1080 1207
530 530 530
638 638 638
1503 1663 1823
0.396 0.439 0.481
413 451 494
1830 2010 2190
P 420-13 P 420-14
670-720 720-780
737-804 789-871
13 14
581 624
158 194
70 87
40 49
2.5 3.5
< 220 < 220
1200 1450
1297 1405
530 530
638 638
1983 2143
0.523 0.565
505 555
2370 2550
7