Laars Neotherm NTH, Инструкция по установке и эксплуатации

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Page 74
8.J
Adjusting CO
2
These units use 3 different gas valves depending
on the the size of the model. All of them have
a Hi-Fire and Low-Fire adjustment.
See page 74 for models 150-285,
See page 75 for models 399-500, and
See page 76 for models 600-850.
The Gas Valve in the 150 thru 285 is at the front
of the unit and can be reached after the front
panel is pulled forward and then off.
Always be patient with your combustion analyzer
when making adjustments to the valve at both
Hi-Fire and Low-Fire.
Be sure to put the cap back onto the valve when
you are done making your adjustments at the
gas valve.
under
cap
Figure 45. Gas Valve 80 - 285 Mbtu
GAS TYPE HIGH FIRE, CO
2
LOW FIRE,
CO
2
DIFFRNTL PRESSURE
(
inches wc
)
Natural 8.8 to 9.8% 0.5% lower than
3.6” to 3.9”
Propane 9.8 to 10.2%
high fire setting
Table 18. Residential, sizes 150 - 285 Mbtu
CO
2
Range and Differential Pressure
150–285
Gas Pressure Tap
LAARS Heating Systems