IDEAL EVOMOD 250, Установка и обслуживание

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42 GAS VALVE ADJUSTMENT - CONT
Minimum rate adjustment
9.
See Table 1 p2 for minimum and maximum gas rate setting.
10.
Set the module to minimum output.
11. Connect a suitable flue analyser to the flue sampling point of
the Master Module.
12.
Remove the protective cap and then using the offset
adjustment screw, adjust the valve on the master module
until the CO
2
value measures 8.4% ± 0.2 (nb. anti-clockwise
reduces CO
2
level).
Note:
The offset adjustment is more
sensitive than the throttle adjustment.
IMPORTANT: The CO measurement when the CO
2
is set
should not exceed 22-ppm. Under no circumstances should
the CO/CO
2
ratio exceed 0.004.
Adjust in steps of no more than
1
/
8
turn and wait 1 minute
after each adjustment to allow setting to stabilise.
13.
Connect a suitable flue analyser to the flue sampling point
on the next Module.
14.
Remove the protective cap and then using the offset
adjustment screw, adjust the valve on the Module until the
CO
2
value measures 8.4% ± 0.2 (nb. anti-clockwise reduces
CO
2
level).
15.
Repeat until all modules are set at minimum.
16.
Re-check the CO
2
level at maximum rate repeating steps 3
to 14 if necessary.
17.
Seal adjustment screw cap with tamper proof paint.
18.
If the required CO
2
level cannot be obtained with a
CO/CO
2
ratio below 0.004 then contact Ideal Boilers
Installer/Technical Help Line - 01482 498376
Maximum Rate Adjustment Screw
(Firstly remove plastic cap for access)
Offset Adjustment Screw
(Firstly remove screw cap for access)
12
5
43 CASING REMOVAL
Module front cover
1.
Remove the two screws retaining the plastic front cover, press and swing the two handles into the removing position.
1
continued . . . . .
SER
VICING
36
-
Installation & Servicing
SERVICING