B&C Technologies IM Series Industrial Ironer - Manual (Page 134)

8
COMBUSTION HEAD ADJUSTMENT
Installation operations are now at the stage where the
blast tube and sleeve are secured to the boiler as shown
in fig. (A).
There are two possible cases:
A - The MIN burner output is not in the values of
table (D).
In diagram (C), depending on the MAX output, find the
notch to use for adjusting the air and the gas, and then
proceed as follows:
Air adjustment (A)
Turn screw 4)(A) until the notch identified is aligned with
the front surface 5)(A) of the flange.
Gas adjustment (B)
Loosen screw 1)(B) and turn ring 2) until the notch iden-
tified is aligned with index 3).
Tighten the screw 1) fully down.
Example:
the burner RS 38/M varies its output between: MIN =
378.7 and MAX = 1288 MBtu/hr.
The MIN output of 378.7 MBtu/hr is not found in the val-
ues of table (D) and therefore diagram (C) is valid, from
which it results that for a MAX output of 1288 MBtu/hr
the gas and air adjustments are done on notch 3, as in
fig. (A) and (B).
In this case the pressure load loss of the combustion
head is given by column 1A page 6.
Note
Diagram (C) shows the ideal settings for the ring 2)(B). If
the gas supply pressure is too low to reach the max out-
put operation pressure indicated on page 6, and if the
ring 2)(B) is not fully open, it can be opened wider by 1
or 2 notches.
Continuing with the previous example, page 6 indicates
that for burner RS 38/M with output of 1288 MBtu/hr a
pressure of approximately 1.81” WC is necessary at test
point 6)(A). If this pressure cannot be reached, open the
ring 2)(B) to notch 4 or 5.
Make sure that the combustion characteristics are satis-
factory and free of pulsations.
B - The MIN burner output is found in the values of the
table (D).
Air adjustment
The same as the previous case: follow diagramm (C).
Gas adjustment
The gas ring 2)(B) is always adjusted to position 0, irre-
spective of the MAX burner.
In this case the pressure load loss of the combustion
heads is given by column 1B page 6.
Once you have finished setting up the head, refit the
burner 4)(E) to the slide bars 3) at approximately 4” from
the sleeve 5) - burner positioned as shown in fig.(B)p.7 -
insert the flame rod cable and the ignition electrode
cable and then slide the burner up to the sleeve so that it
is positioned as shown in fig.(E).
Refit screws 2) on slide bars 3).
Secure the burner to the sleeve by tightening screw 1)
and then refit the split pin into one of two slide bars 3).
Reconnect the swivel connector 8) to the graduated sec-
tor 7).
Connect gas train and pilot train as shown in fig. (A)
page 9.
Important
When fitting the burner on the two slide bars, it is advis-
able to gently draw out the high tension cable and flame
detection probe cable until they are slightly stretched.
(A)
(C)
(B)
(E)
Notches (Air = Gas)
Burner max output
(D)
MODULATION MINIMUM OUTPUT: when the MIN output is within the value range given
below, the gas ring 2)(B) is adjusted to zero.
RS 28/M 198 - 280 MBtu/hr 58 - 82 kW
RS 38/M 266 - 375 MBtu/hr 78 - 110 kW
RS 50/M 321 - 488 MBtu/hr 94 - 143 kW
D2315
D2263
D2262
124