Service And Maintenance Procedures - Bryant 312A Installation, Start-Up, Operating And Service And Maintenance Instructions

(Tabulated Data Based on 21,000 Btuh High- -Heat/14,500 Btuh for Low- -Heat Per Burner, Derated 4% for Each 1000 Ft Above
AVG. GAS
ALTITUDE RANGE HEAT VALUE
AT ALTITUDE
(FT)
(BTUH/CU FT)
6001 to
U.S.A.
7000
Only
AVG. GAS
ALTITUDE RANGE
HEAT VALUE
(FT)
AT ALTITUDE )
7001 to
U.S.A.
Only 8000
ALTITUDE RANGE
(FT)
U.S.A. 8001 to
Only
9000
AVG GAS
ALTITUDE RANGE HEAT VALUE
(FT) AT ALTITUDE
(BTU/CU FT)
U.S.A. 9001 to
Only 10,000
* Orifice numbers 43 are factory installed
SERVICE AND MAINTENANCE
PROCEDURES
WARNING
!
FIRE, PERSONAL INJURY AND UNIT DAMAGE
HAZARD
Failure to follow this warning could result in personal injury,
death and/or property damage.
The ability to properly perform maintenance on this
equipment requires certain knowledge, mechanical skills,
tools, and equipment. If you do not possess these, do not
attempt to perform any maintenance on this equipment other
than those procedures recommended in the User's Manual.
Table 16 - - Orifice Size and Manifold Pressure for Gas Input Rate (cont.)
0.58
Orifice Manifold
No. Pressure
675 44 3.5/1.7
700 44 3.3/1.6
725 45 3.7/1.8
750 46 3.6/1.7
775 46 3.4/1.6
800 47 3.6/1.7
825 47 3.4/1.6
850 48 3.7/1.7
0.58
Orifice Manifold
No. Pressure
650 44 3.3/1.6
675 45 3.7/1.8
700 46 3.6/1.7
725 47 3.8/1.8
750 47 3.5/1.7
775 48 3.8/1.8
800 48 3.6/1.7
825 48 3.3/1.6
0.58
Orifice Manifold
No. Pressure
625 45 3.7/1.8
650 46 3.6/1.7
675 47 3.8/1.8
700 47 3.5/1.7
725 48 3.7/1.8
750 48 3.5/1.7
775 49 3.8/1.8
0.58
Orifice Manifold
No. Pressure
600 46 3.6/1.7
625 47 3.7/1.8
650 47 3.4/1.6
675 48 3.6/1.7
700 48 3.4/1.6
725 49 3.7/1.8
Sea level)
SPECIFIC GRAVITY OF NATURAL GAS
0.60
Orifice Manifold Orifice
No. Pressure No.
43 3.2/1.5 43
44 3.4/1.6 44
45 3.8/1.8 44
46 3.8/1.8 45
46 3.5/1.7 46
47 3.8/1.8 46
47 3.5/1.7 47
48 3.8/1.8 47
SPECIFIC GRAVITY OF NATURAL GAS
0.60
Orifice Manifold Orifice
No. Pressure No.
44 3.4/1.6 44
45 3.8/1.8 44
46 3.7/1.8 46
46 3.5/1.7 46
47 3.7/1.8 47
47 3.4/1.6 47
48 3.7/1.8 48
48 3.5/1.6 48
SPECIFIC GRAVITY OF NATURAL GAS
0.60
Orifice Manifold Orifice
No. Pressure No.
45 3.8/1.8 44
46 3.7/1.8 46
46 3.4/1.6 46
47 3.6/1.7 47
48 3.8/1.8 47
48 3.6/1.7 48
48 3.4/1.6 48
SPECIFIC GRAVITY OF NATURAL GAS
0.60
Orifice Manifold Orifice
No. Pressure No.
46 3.7/1.8 46
47 3.8/1.8 46
47 3.6/1.7 47
48 3.8/1.8 47
48 3.5/1.7 48
49 3.8/1.8 48
WARNING
!
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow this warning could result in personal injury
or death, or property damage.
Before servicing, disconnect all electrical power to furnace.
Verify proper operation after servicing.
45
0.62 0.64
Manifold Orifice Manifold
Pressure No. Pressure
3.3/1.6 43 3.4/1.6
3.5/1.7 43 3.2/1.5
3.3/1.6 44 3.4/1.6
3.7/1.8 45 3.8/1.8
3.6/1.7 46 3.8/1.8
3.4/1.6 46 3.5/1.7
3.6/1.7 47 3.8/1.8
3.4/1.6 47 3.5/1.7
0.62 0.64
Manifold Orifice Manifold
Pressure No. Pressure
3.5/1.7 43 3.2/1.5
3.3/1.6 44 3.4/1.6
3.8/1.8 45 3.8/1.8
3.6/1.7 46 3.7/1.8
3.8/1.8 46 3.5/1.6
3.6/1.7 47 3.7/1.7
3.8/1.8 47 3.4/1.6
3.6/1.7 48 3.7/1.8
0.62 0.64
Manifold Orifice Manifold
Pressure No. Pressure
3.3/1.6 44 3.4/1.6
3.8/1.8 45 3.8/1.8
3.5/1.7 46 3.7/1.7
3.7/1.8 46 3.4/1.6
3.5/1.7 47 3.6/1.7
3.7/1.8 48 3.8/1.8
3.5/1.7 48 3.6/1.7
0.62 0.64
Manifold Orifice Manifold
Pressure No. Pressure
3.8/1.8 45 3.7/1.8
3.5/1.7 46 3.6/1.7
3.7/1.8 47 3.8/1.8
3.4/1.6 47 3.5/1.7
3.6/1.7 48 3.7/1.8
3.4/1.6 48 3.5/1.7