Camus Hydronics MicoFlame Grande MFH2000 Installation, Operation And Service Manual - page 21
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9
OPERATION
The MicoFlame Grande appliance should be
installed and started up by factory qualified
personnel.
9.1
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
7. 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 counter-clockwise to decrease it;
Once satisfied replace the regulator adjustment
screw cap and the elbow pressure tap plug.
Table 7 – Gas pressures at inlet to pilot
PROPANE NATURAL
GAS
Minimum (inches W.C.)
3.9
1.3
Maximum (inches W.C.)
9.3
3.5
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
7.0µA.
Gas Pressure Setting
The gas valve pressure regulator was 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 manifold pressure as
indicated on the rating plate. If adjustment is
necessary the following steps must be followed
(please refer to figure 16): 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 combination 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.
Air Flow Setting
The fan inlet air shutter has been 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 air box pressure as
set in Table 11. If adjustment is necessary the
following steps must be followed: Remove the
lower front jacket panel; connect a manometer
to the air pressure tap provided on the
combustion chamber door; with the fan
operating the air pressure should be set per
Table 11 by adjusting the air inlet shutter on the
fan inlet; To adjust the air shutter, first undo the
securing nut and rotate the bolt so the shutter
will open or close as required; At full input the
CO
2
should be between 7.5% and 8.5% for
natural gas and 1.5% higher for propane and the
CO reading be less than 50 ppm. For a
condensing appliance the CO
2
level shall be in
the range of 8.5% to 9.0%. For Propane CO
2
level will be approximately 1.5% higher.
Once satisfied tighten the nut on the fan’s
shutter bolt making sure it is secured.