38
9.1
SETTING THE CORRECT COMBUSTION
1) Switch the main power off to the boiler by placing the
toggle switch in the ‘OFF’ position
2) Switch the main power on to the boiler and adjust
setpoint so that boiler begins ignition sequence.
3) Observe the boiler as it goes through its startup cycle
and operates at high fire. This cycle is detailed on
Figure 33 in section 11.9 Ignition Cycle.
4) Insert the combustion measurement probe into the stack
when high fire operation is observed. Check to see that
fan is running at maximum fan speed using the Control
Panel.
5) The combustion values should reside in the range listed
in Table 18. If combustion values are not within this
range refer to Section 9.2 Gas Valve Adjustment
Procedure to correct this issue.
Table 18: Combustion Values
Natural Gas
Propane
CO
2
CO
CO
2
CO
Max.
Fire
8.5% - 9.0%
<100
9.5% -
10.0%
<100
PPM
PPM
Min.
Fire
8.0% - 8.5%
<100
9.0% - 9.5%
<100
PPM
PPM
6) When the combustion values are satisfied record these
values as Camus requires these for warranty purposes.
7) Remove the combustion measurement device and
switch the main power off to the boiler by placing the
toggle switch in the ‘OFF’ position.
8) Replace the flue temperature sensor back to its proper
location.
9.2
GAS VALVE ADJUSTMENT PROCEDURE
If adjustment of the gas valve is required use the following
procedure.
In order to perform adjustments to the gas valve the TH must
be firing before proceeding.
TH 082 – 252
Figure 25: Venturi & Gas Valve Assembly
To adjust the high-fire setting on standard display
Press and hold the ‘Next’ button for 3 seconds to enter the
diagnostic menu on the TH Control Panel. Press ‘Next’ until
the following screen appears:
Figure 26: High Fire Adjustment Screen
To return to normal operation press ‘Done’.
To adjust the high-fire setting on upgraded display
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 side of the venturi.
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.
Increase CO2
Decrease CO2
High Fire
Adjustment
Counter-
Clock Wise
Clockwise
To adjust the low fire setting on standard display
Press and hold the ‘Next’ button for 3 seconds to enter the
diagnostic menu on the TH Control Panel. Press ‘Next’ until
the following screen appears:
Figure 27: Low Fire Adjustment Screen
To return to normal operation press ‘Done’.
To adjust the low fire setting on the upgraded display
1) Press the
button
2) Select Test and press
3) Select Forced Rate and press
4) Select Set Low Fire
The TH should respond immediately and fire at minimum fan
speed. When this is achieved locate the low fire adjustment
screw. This screw is covered with a cap, which can be
removed using a Torx 40 screwdriver. When the correct
combustion values are achieved replace the screw cap back
on to the gas valve.
Содержание TH082
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