Installation / Operation Instruction Manual

Page 75
Brute HIGH EFFICIENCY COMMERCIAL BOILERS AND VOLUME WATER HEATERS
®
Figure 46. Gas Valve 399 - 500 Mbtu
GAS TYPE HIGH FIRE, CO
2
LOW FIRE, CO
2
MANIFOLD
PRESSURE
Natural 8.8 to 9.0% 0.5% lower than -.005” to
Propane 9.8 to 10.0%
high re setting -.015” wc
Table 18. Commercial, sizes 399 - 850 Mbtu CO
2
Range and Manifold Pressure
399
500
The Gas Valve in the 399 and 500 is at the front of the
unit and can be reached after the front panel is pulled
forward and then o󰀨.
Always be patient with your combustion analyzer
when making adjustments to the valve at both Hi-Fire
and Low-Fire.