Navien NCB-24LSWE, Руководство по обслуживанию

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NCB Service Manual 29
Version 1.0
Model
Gas type
G20 G31
[20 mbar] [37 mbar]
Output Consumption Gas flow Gas flow
Load Kcal/h kW kW m
3
/h m
3
/h
NCB-24LSWE
Max. 16,770 19.5 20.0 2.142 0.804
Min. 3,552 4.1 4.2 0.450 0.169
NCB-28LSWE
Max. 20,124 23.4 24.0 2.570 0.964
Min. 3,522 4.1 4.2 0.450 0.169
NCB-34LSWE
Max. 24,317 28.3 29.0 3.106 1.165
Min. 4,276 5.0 5.1 0.546 0.205
NCB-40LSWE
Max. 28,509 33.2 34.0 3.641 1.366
Min. 3,354 3.9 4.0 0.428 0.161
c. Fully open a hot water outlet fitting and set the
boiler to operate at 1-stage MIN mode (refer to
table 2 for information about setting modes).
Measure the offset value at a low flame setting
and compare it to the values in Table 3. If the
offset value is outside the range, adjust the gas
valve set screw. If set screw adjustment is
required, locate the set screw as shown in Figure
11. Use a 4mm (5/32 in) Allen wrench to turn the
set screw no more than a 1/4 turn clockwise to
increase or anticlockwise to decrease the offset
value.
Figure 11. Set screw location
The set screw is located behind a
removable cover. To access the set screw,
loosen the screws and remove the cover.
d. At high flame setting, do not check the offset
value and never adjust the gas valve.
DANGER
Improper gas valve settings can
cause property damage, serious
personal injury, or fatality.