5
P/N 240011775 Rev. A [02/02/17]
HEAT EXCHANGER CLEANING INSTRUCTIONS
C - Combustion Setup (High-Fire)
•
Unscrew exhaust port plug at exhaust flue test port. See
Figure 6.
•
Insert combustion analyzer into exhaust flue test port.
Verify opening around combustion analyzer probe is
completely sealed when taking measurements.
•
Set boiler to high-fire by pressing two buttons
simultaneously. Display will show
H3
and the
symbol
will appear.
• Measure percentage of O
2
or CO
2
in flue gases.
• Compare the measured values with values in table below.
Remove front panel when comparing values.
•
Adjust gas/air ratio using high-fire adjustment screw (
V
)
if needed. Turn screw clockwise to reduce CO
2
level and
counterclockwise to increase it.
V
O
2
/CO
2
Values at High Fire Natural Gas
Nominal value
Permitted value
O
2
%
CO
2
%
O
2
%
CO
2
%
4.3
9.3
3.9 - 4.7
9.1 - 9.5
O
2
/CO
2
Values at High-Fire Propane Gas
Nominal value
Permitted value
0
2
%
CO
2
%
0
2
%
CO
2
%
5.7
10.0
5.4 - 6.0
9.8 - 10.2
D - Combustion Setup (Low-Fire)
•
Unscrew exhaust port plug at exhaust flue test port.
•
Insert combustion analyzer into exhaust flue test port.
Verify the opening around combustion analyzer probe is
completely sealed when taking measurements.
•
Set boiler to low-fire by pressing two buttons
simultaneously. If the boiler is already in combustion setup
mode for high fire, press the (-) button several time until
L3
is displayed on the screen.
• Measure percentage of O
2
or CO
2
in flue gases.
• Compare the measured values with values in table below.
Remove front panel when comparing values.
•
Adjust gas/air ratio using low-fire adjustment screw (
K
)
if needed. Turn screw clockwise to increase CO
2
level and
counterclockwise to decrease it.
K
O
2
/CO
2
Values at Low-Fire Natural Gas
Nominal value
Permitted value
O
2
%
CO
2
%
O
2
%
CO
2
%
5.7
8.5
5.4 - 6.1
8.3 - 8.7
O
2
/CO
2
Values at Low-Fire Propane Gas
Nominal value
Permitted value
0
2
%
CO
2
%
0
2
%
CO
2
%
6.4
9.6
6.1 - 6.70
9.4 - 9.8
K - Screw cover shown.
Adjustment screw is
located under cover.
38.
Follow instructions in boiler's Installation, Operation &
Maintenance Manual for proper startup and verification
procedures.
39.
Verify proper operation.
Содержание UCS-380
Страница 1: ...UCS 380 CONDENSING GAS FIRED BOILER ...
Страница 50: ...48 8 ELECTRICAL CONNECTIONS FIGURE 8 16 Wiring Diagram PN 240011662 Rev K 01 31 2020 ...
Страница 91: ......
