Bryant LEGACY 577C- - Check Burner Flame

15
FIRE AND UNIT DAMAGE HAZARD
Failure to follow this warning could result in personal
injury or death and/or property damage.
Unsafe operation of the unit may result if manifold pressure
is outside this range.
!
WARNING
3. Replace regulator cover screw on gas valve (See Fig. 13).
4. Turn off gas supply to unit. Remove manometer from
pressure tap and replace pipe plug on gas valve. (See Fig.
11.) Turn on gas to unit and check for leaks.
Measure Manifold Pressure (Propane Units)
Refer to propane kit installation instructions for properly checking
gas input.
NOTE: For installations below 2,000 ft (610 m), refer to the unit
rating plate for proper propane conversion kit. For installations
above 2,000 ft (610 m), contact your distributor for proper propane
conversion kit.
Check Burner Flame
With control access panel (see Fig. 20) removed, observe the unit
heating operation. Watch the burner flames to see if they are light
blue and soft in appearance, and that the flames are approximately
the same for each burner. Propane will have blue flame (See Fig.
12). Refer to the Maintenance section for information on burner
removal.
Table 4 – High Altitude Compensation, Natural Gas -- Single Phase Models
Nameplate
Input ( Btu/hr)
Rated Heating Input (Btu/hr), Natural Gas at Installation Altitude Above Sea Level, U.S.A.*
0 to 2000 ft
( 0 --- 6 1 0 m )
2001 to 3000 ft*
(611 to 914 m)
3001 to 4000 ft
(915 to 1219 m)
4001 to 5000 ft
(1220 to 1524 m)
5001 to 6000 ft
(1524 to 1829 m)
40000 40000 36000 34400 32800 31200
60000 60000 54000 51600 49200 46800
90000 90000 81000 77400 73800 70200
115000 115000 103500 98900 94300 89700
127000 127000 114300 109200 104100 99100
*In the U.S.A., th e input rating for altitudes above 2000 ft (610m) must be reduced by 4% for each 1000 f t (305 m) above sea level.
In Ca nada, th e input rating for altitudes from 2001 to 4500 f t (611 to 1372 m) above sea l evel must be derated by 10% by an a uthorized gas conversion stationor
dealer.
For Can a dian Installations from 2000 to 4500 ft (610 ---1372 m), use U.S.A. column 2001 to 3000 ft (611 to 914 m).
Table 5 – High Altitude Compensation, Natural Gas -- Three Phase
Nameplate
Input ( Btu/hr)
Rated Heating Input (Btu/hr), Natural Gas at Installation Altitude Above Sea Level, U.S.A.*
0 to 2000 ft
( 0 --- 6 1 0 m )
2001 to 3000 ft*
(611 to 914 m)
3001 to 4000 ft
(915 to 1219 m)
4001 to 5000 ft
(1220 to 1524 m)
5001 to 6000 ft
(1524 to 1829 m)
40000 40000 36000 34400 32800 31200
60000 60000 54000 51600 49200 46800
90000 90000 81000 77400 73800 70200
115000 115000 103500 98900 94300 89700
130000 130000 117000 111800 106600 101400
*In the U.S.A., th e input rating for altitudes above 2000 ft (610m) must be reduced by 4% for each 1000 f t (305 m) above sea level.
In Ca nada, th e input rating for altitudes from 2001 to 4500 f t (611 to 1372 m) above sea l evel must be derated by 10% by an a uthorized gas conversion stationor
dealer.
For Can a dian Installations from 2000 to 4500 ft (610 ---1372 m), use U.S.A. column 2001 to 3000 ft (611 to 914 m).
Table 6 – Heating Inputs
HEATING INPUT
(BTUH)
NUMBER
OF
GAS SUPPLY PRESSURE (IN. W.C.)
MANIFOLD PRESSURE
NUMBER
OF
ORIFICES
Natural{ Propane*{
MANIFOLD
PRES
SURE
(IN. W.C.)
ORIFICES
Min Max Min Max Natural{ Propane*†
40,000 2 4.0 13.0 11.0 13.0 3.23.8 10.0
60,000 3 4.0 13.0 11.0 13.0 3.23.8 10.0
90,000 3 4.5 13.0 11.0 13.0 3.23.8 10.0
115,000 3 4.5 13.0 11.0 13.0 3.23.8 10.0
130,000 3 4.5 13.0 11.0 13.0 3.23.8 10.0
*When a unit is converted to propane, different size orifices must be used. See separate, natural ---to ---propane conversion kit instructions.
{Based on altitudes from sea level to 2000 ft (610 m) above sea level. In U.S.A. for altitudes above 2000 ft (610 m), reduce input ra ting 4 percent for each addi-
tional 1000 f t (305 m) above sea level. In Canada, from 2000 f t (610 m) above sea level to 4500 ft (1372 m) above sea level, derate the unit 10 percent.
577C-- -- C