Manual Calibration Function; Aeration Function; Commission Set Up (Gas) - Changing The Type Of Gas - UTICA BOILERS MAH-100 Manual

NOTICE
During initial ignition, burner may not ignite. This may
cause boiler to shut down until any air in gas pipes is
vented. Repeat ignition procedure until gas reaches the
burner. To reset boiler operation, press
2 seconds.

9.9 Manual Calibration Function:

Manual Calibration phase starts at the end of the Automatic
Calibration.
The Display shows the boiler power and adjustment of the
CO2 value (parameter setting) during Manual Calibration
sequence.
The process begins at minimum power.
A. After Automatic Calibration sequence with
flashing together on the display, you can adjust
minimum power combustion by pressing
CO , and to raise % CO
2
B. When minimum power combustion is in the specified
range, press and then
C. Press to adjust ignition power combustion. Press
to lower % CO , and
2
D. When ignition power combustion is in the specified
range, press and then
E. Press to adjust maximum power combustion. Press
to lower % CO , and
2
F. When maximum power combustion is in the specified
range, press to exit Manual Calibration Function ESC
is displayed on the sceen..
IMPORTANT INFORMATION
A. If venting or gas recognition function is interrupted
by power blackout, start function again when power is
restored. Press and
time for at least 6 seconds.
B. If display shows fault E118 (low pressure in hydraulic
circuit) open filling tap on appliance and restore correct
pressure.
C. If gas recognition function is interrupted due
to fault (e.g.: E133 no gas) press
reset. Then press
6 seconds) to restart the function again.
If gas recognition function is interrupted due to
overheating, restart function by pressing and holding
down together for at least 6 seconds.
D. Combustion of this appliance has been factory controlled,
calibrated and set for operation with Gas A (Natural
Gas).
E. During Gas Type Control Function, combustion ratio will
increase for a short period of time while gas type is being
established.
9 - START UP PROCEDURE
for at least
to lower %
.
2
to reach ignition power.
to raise % CO .
2
to reach maximum power.
to raise % CO .
2
together and hold at same
to
and (for at least
9.10 De-Aeration Function
Used to eliminate air inside the heating circuit when boiler
is installed or after maintenance when water is drained from
primary circuit.
1.
Press buttons
On appears on display for a few seconds, followed by
program row 312.
2.
The electronic board will activate pump on/off cycle for
10 minutes. Function will automatically stop at end of the
cycle.
3.
To manually exit this function, press
together and hold for 6 seconds.
FIGURE 9-3 - Gas Inlet Tap - Pi
PI = Gas Supply Inlet Pressure Tap
9.11 Commission Set Up (Gas) - Changing The Type
Of Gas
During the first installation boiler carries out an automatic
commissioning function.
The system is able to detect the gas type present in the
network.
Correct gas type setting, is made by pressing two buttons at
the same time, see section 9.6 Commissioning.
Change of gas type is made after the first installation:
• Change parameter P02. See section 9.6
Commissioning and section 9.15 Parameter Settings.
• Check minimum gas pressure is suitable for selected gas:
minimum gas pressure is determined with boiler operating
at high fire and any other appliances connected to same fuel
source operational as well (whole house load)
Gas A (NG) = 3.5" (8.7 mbar)
Gas E (LPG) = 8.0" (19.9 mbar)
• Place supplied label with indication of gas type close to
the data plate of boiler replacing the original.
• Perform Automatic Calibration Function - Section 9.8.
• Manufacturer recommends
on the flue.
52
together and hold for 6 seconds.
buttons
verification of CO concentration
2
240013354 REV B [09/15/2021]