Strebel S-CB+ Series, Installation Operating & Maintenance Manual

Page: 98 / 125

S-CB
+
Boiler Range Manual
98
14.2 Adjusting in case of a new boiler, or after maintenance (case A)
14.2.1 G
ENERAL REMARK
For all adjusting steps under A the following must be applied: as long as measured CO
2
values differ less than
0,3% from the table values, no adjustment is necessary, because this deviation is typical for the process (O
2
val-
ues: ± 0,5%). If, however, larger deviations are measured, adjustment now must be made until the table value is
reached within max. 0,1% deviation (O
2
: ± 0,2%).
14.2.2 C
HECKING AND ADJUSTING AT MAXIMUM LOAD
Adjust at maximum load by carrying out procedure 1 on p.100.
14.2.3 C
HECKING AND ADJUSTING AT MINIMUM LOAD
Adjust at minimum load by carrying out procedure 2 on p.100.
14.3 Adjusting in case of valve replacement or gas conversion (case B)
Maximum fan speed has to be reduced to convert the boiler into a propane or B/P appliance. Setting
parameter P4BD.
14.3.1 G
ENERAL REMARKS
In case B , a distinction is made between the setting of boilers containing a single valve (S-CB
+
60 to S-CB
+
100) and
boilers with a double valve (S-CB
+
120 to S-CB
+
180).
All adjustments must result in CO
2
percentages within a bandwidth of max. ± 0,1% deviation from the table values
(O
2
: ± 0,2%).
14.3.2 C
HECKING AND ADJUSTING AT MAXIMUM LOAD
S-CB
+
60 / S-CB
+
80 / S-CB
+
100
The boilers S-CB
+
60, S-CB
+
80 and S-CB
+
100 all have single gas valves, see the drawings on page 94.

First, turn setting screw [2] of the gas valve clockwise until you feel resistance. This means that the valve is
closed, do not try to tighten the screw any further .

Now turn screw [2] counter clockwise (open), according to the number of turns in table 2 or 3 for the used boiler
and gas type.
After this, adjust at maximum load by carrying out procedure 1 on page 100.
If the burner doesn’t start up in service mode, turn screw [2] a quarter turn counter clockwise further open, and try
again.
14.3.3 C
HECKING AND ADJUSTING AT MINIMUM LOAD
S-CB
+
60 / S-CB
+
80 / S-CB
+
100
Adjust at minimum load by carrying out procedure 2 on page 100.
IMPORTANT: Toggle between high fire and low fire to make fine-tuning adjustments (adjusting the minimum set-
ting affects the maximum setting and contrariwise).
In case of gas conversion, paste the corres-
ponding sticker at the appropriate position in the
boiler and mark the square for the used gas type.
Also mark the square, indicating that the correct
value has been set for parameter P4BD.
(In the example on the right, ‘propane’ and ‘P4BD =
1’ have been marked).
For adjusting double gas valves S-CB
+
120 / S-CB
+
150 / S-CB
+
180 see next page
