Start-Up - Camus Hydronics MFH060 Installation, Operation And Service Manual

For your safety follow the lighting and operating instructions below and on the boiler.
To turn on main burner, slowly open firing valve after pilot is established.
Set primary system controller to desired temperature.
To turn off boiler close main manual gas valve, close pilot manual valve and turn off electric power to
system.
20.2

START-UP

Gas appliances are rated based on sea level operation with no adjustment required at elevations up to
2000 ft. At elevations above 2000 ft the input rating must be reduced by 4% for each additional 1000 ft
elevation. Never increase the input of the appliance above that for which it is rated.
Pilot Pressure Setting
The pilot was preset at the factory. The following description is for the benefit of the start-up technician
should minor adjustment be required.
The pilot burner is controlled by a separate pilot valve. Pilot pressure setting is as shown in Table 9. A
view port is provided on the appliance's return end to view the pilot and the main burners. If adjustment is
necessary the following steps must be followed: Remove the lower front jacket panel; Remove the ⅛"
plug from the elbow pressure tap and connect a manometer; Remove regulator adjustment screw cap
from the pilot valve; Rotate the regulator adjustment screw clockwise to increase the manifold pressure or
counterclockwise to decrease it; Once satisfied replace the regulator adjustment screw cap and the elbow
pressure tap plug.
Pilot Flame Rectification Setting
The pilot flame rectification was preset at the factory. The following description is for the benefit of the
start-up technician should minor adjustment be required. Set pilot to obtain best µA reading from flame
rectification. Minimum average signal of 1.5 µA is required. If required, test the signal using a DC µA
meter following this procedure for Honeywell S8600 ignition module: Disconnect ground wire at appliance
transformer; Disconnect the 24V power and ground wires from all S8600 ignition modules not being
tested; Set meter to µA DC: Connect one of the meter's terminals to the burner ground terminal on the
S8600 and the other terminal to the burner ground wire; Pilot running without main burner will generate
1.5 µA average for best operation. With main burner running, the signal will be in a range of 4.0 to 7.0 µA.
High Fire Setting
The gas valve high fire pressure regulator is preset at the factory. The following description is for the
benefit of the start-up technician should minor adjustment be required.
Optimum results are obtained when the appliance is operated with CO
If adjustment is necessary the following steps must be followed (please refer to Figure 26).
perform adjustments to the gas valve the MicoFlame must be firing before proceeding.
Table 11: Gas pressures at inlet to pilot
Minimum (inches W.C.)
Maximum (inches W.C.)
NATURAL
PROPANE
GAS
3.9 1.3
9.3 3.5
readings as indicated in Table 12.
2
45
In order to