W415-2159 / D / 11.24.17
40
IOM
IOM
w.c high
fi
re for natural gas, 4.0” w.c low
fi
re, 10.0” w.c. high
fi
re for LP gas. Always adjust regulator
according to original equipment manufacturer’s speci
fi
cations listed on the appliance rating plate.
When the correct pressure has been established, securely replace the regulator cover screw.
6. Turn off the gas and electrical supply to the furnace.
H3.21
ALL REGULATOR ADJUSTMENTS MUST BE DONE BY A TRAINED, QUALIFIED TECHNICIAN.
IMPROPER MODIFICATIONS OR ADJUSTMENTS CAN RESULT IN FIRE OR EXPLOSION
CAUSING PROPERTY DAMAGE, SEVERE PERSONAL INJURY OR LOSS OF LIFE.
WARNING
!
!
H18.5.4
7.
Remove the manometer hose from the outlet pressure tap boss, and tighten the outlet pressure tap screw
using the 3/32” Allen wrench. (Clockwise, 7 in-lb minimum).
8. Turn on the gas supply and electrical power to the furnace.
9. Turn on system power and energize valve.
10. Using a leak detection solution or soap suds, check for leaks at pressure boss screw. Bubbles forming
indicate a leak. SHUT OFF GAS AND FIX ALL LEAKS IMMEDIATELY!
FIGURE 30 - MANOMETER MEASURING GAS MANIFOLD PRESSURE
H18.6.2A
IMPORTANT:
NEVER ADJUST THE INPUT
OF THE FURNACE TO
EXCEED THE INPUT SHOWN
ON THE RATING PLATE.
Input =
Heating Value of Gas x 3600
Time in Sec. for 1 cu. ft.
where:
•
input is expressed in Btu/hr
•
heating value of the gas is expressed in Btu/ft
3
• and time is the number of seconds required for
the test dial to indicate 1 cubic foot.
If using a gas meter with SI (metric) units:
•
1 cubic foot = 0.0283 cubic meters
•
1 cubic meter = 35.315 cubic feet
•
0.01 cubic meter = 0.3531 cubic feet
•
0.5 cubic meter = 1.766 cubic feet
The natural gas supply pressure should be a maximum of 7” w.c. and minimum of 5” w.c. The input rating of
the furnace is based on 1000 Btu/ft.³ gas with a speci
fi
c gravity of 0.6.
Since heating values for the gas vary geographically, the actual furnace input and output will vary accordingly.
For example, natural gas with a 900 Btu/ft.³ heating value will reduce the input to 90% of the rated input.
Natural gas with a 1100 Btu/ft.³ heating value will increase the input to approximately 110% of the rated input.
This is not usually a problem; however, adjustments to compensate for this can be made by minor adjustments
to the burner manifold pressure or by changing the burner ori
fi
ce size. Contact the fuel supplier for speci
fi
c
heating content values.
Any adjustments to the burner manifold pressure should be carried out with the use of a manometer or
calibrated Magnehelic® gauge. Do not adjust the gas valve pressure regulator more than ±0.3” w.c. Refer to
Figure 30.
13.5 CHECKING FURNACE INPUT
Содержание 9600E E-STAR Series
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