GB
23
A
S
R
S
A
A
R
S
S
PKQ 644 D GH /HA
PKQ 755 D GH /HA
Table 1
Natural Gas Adjusting the burner’s
(G20 / 20 mbar) primary air
Nominal (mbar)
Minimum (mbar)
Maximum (mbar)
20
17
25
Fast (R)
Semi Fast (S)
Auxiliary (A)
Supply pressures
Burner
Diameter
(mm)
Thermal Power
kW (p.c.s.*)
157
132
110
3.00
1.90
1.00
Nomin. Reduc.
1.00
0.80
0.50
Nozzle
1/100
Flow*
l/h
(mm)
(G20)
125
100
72
(mm)
4.7
2.6
2.0
286
157
95
Burner and nozzle specifications
* At 15°C and 1013,25 mbar-dry gas
Natural
P.C.S. = 37.78 MJ/m³
By-pass
1/100
(mm)
73
66
54