Camus Hydronics DynaMax DMH201 Installation And Service Manual page 56

DM 299 – 399
Figure 57: DM 299 – 399 Gas Valve
Low-fire air gas ratio adjustment
(use Torx 40 for adjustment,
clockwise increases CO
High-fire air gas ratio adjustment
(Use slotted screwdriver for
adjustment, counter-clockwise
increases CO
To adjust the high-fire setting
1) Press the button
2) Select Test and press
3) Select Forced Rate and press
4) Select Set High Fire
Locate the high-fire adjustment screw on the top side of the
gas valve. The screw can be identified by a red cylinder
casing around the screw. Turn the screw 1/8 turn in either
way for each adjustment to keep track of the adjustments.
After adjusting the screw wait a moment for the combustion
levels to stabilize before attempting to make any further
adjustments. Continue this procedure until combustion
levels are satisfied.
High Fire
Adjustment
Select Stop Test to return to normal operation or the boiler
will return to normal operation after 5 minutes
To adjust the low fire setting
1) Press the button
2) Select Test and press
3) Select Forced Rate and press
4) Select Set Low Fire
The DynaMax HS should respond immediately and fire at
1500 RPM. When this is achieved locate the low fire
adjustment screw as illustrated in Figure 57. When the
correct combustion values are achieved replace the screw
cap back on to the gas valve.
Low Fire
Adjustment
)
2
)
2
Increase CO2 Decrease CO2
Counter-
Clockwise
Clock Wise
Increase CO2 Decrease CO2
Select Stop Test to return to normal operation or the boiler
will return to normal operation after 5 minutes
DM 500 – 800
Figure 58: DM 500 - 800 Gas Valve
Gas Inlet
To adjust the high-fire setting
1) Press the button
2) Select Test and press
3) Select Forced Rate and press
4) Select Set High Fire
Locate the input adjustment screw on the top side of the gas
valve. Turn the screw 1/8 turn in either way for each
adjustment to keep track of the adjustments. After adjusting
the screw wait a moment for the combustion levels to
stabilize before attempting to make any further adjustments.
Continue this procedure until combustion levels are satisfied.
High Fire
Adjustment
Select Stop Test to return to normal operation or the boiler
will return to normal operation after 5 minutes
To adjust the low fire setting
1) Press the button
2) Select Test and press
3) Select Forced Rate and press
4) Select Set Low Fire
The DynaMax HS should respond immediately and fire at
1500 RPM. When this is achieved locate the low fire
adjustment screw as illustrated in Figure 58. When the
correct combustion values are achieved replace the screw
cap back on to the gas valve.
Counter-
Clockwise
Clock Wise
Lift top cover to access high fire
air/gas ratio adjustment (use 3mm
allen key for adjustment, counter-
clockwise increases CO
2)
Low-fire air/gas ratio
adjustment, use Torx 40 for
adjustment, clockwise
increases CO
2
Increase CO2 Decrease CO2
Counter-
Clockwise
Clock Wise
Increase CO2 Decrease CO2
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