Camus Hydronics MFH060 Installation, Operation And Service Manual page 50

MF 60 – 150
To adjust the high fire setting
o
Set the Target Temperature to 190 F using the BTC 1 Controller.
Figure 27: Venturi & Gas Valve Assembly
Once the appliance is at maximum fan speed locate the input adjustment screw on the side of the venturi.
Using a flat head screwdriver turn the screw clockwise to decrease CO levels and counter-clockwise to
2
increase CO levels. Turn the screw 1/4 turn in either way for each adjustment to keep track of the
2
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.
Reset the Target Temperature to normal operating conditions on the BTC 1 Controller.
To adjust the low fire setting
o
Observe the Boiler Inlet Temperature. Set the Boiler Target temperature so that it is 10 F above the Boiler
Inlet Temperature. The boiler will begin to modulate to low-fire as setpoint is being reached. The actual
modulation rate will be shown on the screen as Modulation, this will be shown as a percentage. Low-fire
is achieved at 25%.
When this is achieved locate the low fire adjustment screw as illustrated in Figure 26. This screw is
covered with a cap, which can be removed using a Torx 40 screwdriver. With the screw cap removed
using a Torx 40 screwdriver rotate clockwise to increase CO levels and counter-clockwise to decrease
2
CO levels. When the correct combustion values are achieved replace the screw cap back on to the gas
2
valve.
Reset the Target Temperature to normal operating conditions on the BTC 1 Controller.
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