Camus Hydronics DFH/W500 Installation, Operation And Service Manual page 55

Figure 34: DF 500 – 1750 Gas Valve
Low fire air/gas ratio adjustment
(use T-40 for adjustment,
clockwise increases CO
To adjust the high-fire setting (DF 500 – 1750)
Use the DynaFlame® Control Panel:
1) Press [DIAGNOSTICS] button
2) Press [Diagnostic Tests] button
3) Move the firing rate slider to maximum firing rate
as indicated by the test sticker
4) Press [Start Test] to operate the boiler at max fire
for 5 minutes.
Locate the input adjustment screw on the top side of the
gas valve.
High Fire
Adjustment
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.
To adjust the low fire setting (DF 500 – 1750)
Use the DynaFlame® Control Panel:
1) Press [DIAGNOSTICS] button
2) Press [Diagnostic Tests] button
3) Move the firing rate slider to minimum firing rate
4) Press [Start Test] to operate the boiler at min fire
for 5 minutes.
The DynaFlame® should respond immediately and fire at
minimum firing rate. When this is achieved locate the low
fire adjustment screw as illustrated above.
Low Fire
Adjustment
When the correct combustion values are achieved replace
the screw cap back on to the gas valve.
•
This boiler is designed for low fire soft start. At the start
of trial for ignition the fan will decelerate to minimum
fire and will light off at low fire before ramping up
towards full input through the PWM or 4-20mA signal
from the controller.
Lift top cover to access high fire
air/gas ratio adjustment
(use 3mm allen key for adjustment,
counter-clockwise increases CO
)
2
Gas Inlet
Increase CO2 Decrease CO2
Counter-
Clockwise
Clock Wise
Increase CO2 Decrease CO2
Counter-
Clockwise
Clock Wise
•
Shut power off to the heater and open the firing valve.
Switch power back on and allow the burner to fire.
Ignition should be smooth. Always make adjustments
to meet the recommended CO
)
first followed by low fire adjustment.
2
To adjust the high-fire setting (DF 2000 – 6004)
One or more manometers should be connected to the
DynaFlame® before proceeding to the next step to monitor
the air and gas signal. Refer to Section 3.7 of this manual
for details on connecting manometers.
Use the DynaFlame® Control Panel:
1) Press [DIAGNOSTICS] button
2) Press [Diagnostic Tests] button
3) Move the firing rate slider to 100.0%
4) Press [Start Test] to operate the boiler at max fire
for 5 minutes.
Figure 35: DF2000 – 3000 Gas Train Layout
Figure 36: DF3500 – 6004 Gas Train Layout
Locate the metering valve on the gas train.
High Fire
Adjustment
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.
levels. Adjust high fire
2
Increase CO2 Decrease CO2
Counter-
Clockwise
Clock Wise
50