30
Table 14 – Gas Valve Outlet Pressure for Gas Heat Values at
Altitude -- 80,000
(Tabulated Data Based on 80,000 BTUH Input, for 0-ft (0-m) to
5000-ft (1524 M) above sea level)
ALTITUDE
RANGE
ft (m)
AVG. GAS
HEAT
VALUE AT
ALTITUDE
(Btu/cu ft)
SPECIFIC GRAVITY OF
NATURAL GAS
0.58
0.60
0.62
0.64
Manifold Pressure (in. W.C.)
U.
S
.A.
900
2.8
2.9
3.0
3.1
0
925
2.6
2.7
2.8
2.9
(0)
950
2.5
2.6
2.7
2.8
975
2.4
2.5
2.5
2.6
to
1000
2.3
2.3
2.4
2.5
1025
2.1
2.2
2.3
2.4
2000
1050
2.0
2.1
2.2
2.3
(610)
1075
1.9
2.0
2.1
2.1
1100
1.9
1.9
2.0
2.1
U.
S
.A.
800
3.0
3.1
3.1
3.1
2001
825
2.8
2.9
3.0
3.1
(611)
850
2.7
2.8
2.9
3.0
875
2.5
2.6
2.7
2.8
to
900
2.4
2.5
2.5
2.6
925
2.2
2.3
2.4
2.5
3000
950
2.1
2.2
2.3
2.4
(914)
975
2.0
2.1
2.2
2.2
1000
1.9
2.0
2.1
2.1
U.
S
.A.
On
ly
775
3.0
3.1
3.1
3.1
800
2.8
2.9
3.0
3.1
3001
825
2.6
2.7
2.8
2.9
(915)
850
2.5
2.6
2.6
2.7
to
875
2.3
2.4
2.5
2.6
900
2.2
2.3
2.3
2.4
4000
925
2.1
2.1
2.2
2.3
(1219)
950
2.0
2.0
2.1
2.2
975
1.9
1.9
2.0
2.1
1000
1.8
1.8
1.9
2.0
U.
S
.A.
On
ly
750
2.9
3.0
3.1
3.1
775
2.7
2.8
2.9
3.0
4001
800
2.6
2.7
2.8
2.8
(1220)
825
2.4
2.5
2.6
2.7
850
2.3
2.4
2.4
2.5
to
875
2.1
2.2
2.3
2.4
900
2.0
2.1
2.2
2.2
5000
925
1.9
2.0
2.0
2.1
(1524)
950
1.8
1.9
1.9
2.0
975
1.8
1.8
1.8
1.9
1000
1.8
1.8
1.8
1.8
Table 15 – Gas Valve Outlet Pressure for Gas Heat Values at
Altitude -- 100,000
(Tabulated Data Based on 100,000 BTUH Input for 0-ft (0m) to
5000-ft (1524 M) above sea level)
ALTITUDE
RANGE
ft (m)
RANGE
ft (m)
HEAT
VALUE
AT ALTI-
TUDE
(Btu/cu ft)
SPECIFIC GRAVITY OF
NATURAL GAS
0.58
0.60
0.62
0.64
Manifold Pressure (in. W.C.)
U.
S
.A.
900
3.3
3.4
3.5
3.6
0
925
3.1
3.2
3.3
3.4
(0)
950
2.9
3.0
3.1
3.2
975
2.8
2.9
3.0
3.1
to
1000
2.6
2.7
2.8
2.9
1025
2.5
2.6
2.7
2.8
2000
1050
2.4
2.5
2.6
2.6
(610)
1075
2.3
2.4
2.4
2.5
1100
2.2
2.3
2.3
2.4
U.
S
.A.
800
3.5
3.7
3.8
2.8
2001
825
3.3
3.4
3.6
3.7
(611)
850
3.1
3.2
3.3
3.5
875
3.0
3.1
3.2
3.3
to
900
2.8
2.9
3.0
3.1
925
2.6
2.7
2.8
2.9
3000
950
2.5
2.6
2.7
2.8
(914)
975
2.4
2.5
2.5
2.6
1000
2.3
2.3
2.4
2.5
U.
S
.A.
On
ly
775
3.5
3.6
3.7
3.8
800
3.3
3.4
3.5
3.6
3001
825
3.1
3.2
3.3
3.4
(915)
850
2.9
3.0
3.1
3.2
to
875
2.7
2.8
2.9
3.0
900
2.6
2.7
2.8
2.8
4000
925
2.4
2.5
2.6
2.7
(1219)
950
2.3
2.4
2.5
2.6
975
2.2
2.3
2.3
2.4
1000
2.1
2.2
2.2
2.3
U.
S
.A.
On
ly
750
3.4
3.5
3.7
3.8
775
3.2
3.3
3.4
3.5
4001
800
3.0
3.1
3.2
3.3
(1220)
825
2.8
2.9
3.0
3.1
850
2.7
2.8
2.9
2.9
to
875
2.5
2.6
2.7
2.8
900
2.4
2.5
2.5
2.6
5000
925
2.3
2.3
2.4
2.5
(1524)
950
2.1
2.2
2.3
2.4
975
2.0
2.1
2.2
2.2
1000
1.9
2.0
2.1
2.1
SERVICE AND MAINTENANCE
PROCEDURES
Untrained personnel can perform basic maintenance functions
such as cleaning and replacing air filters. All other operations
must be performed by trained service personnel. A qualified
service person should inspect the furnace once a year.
FIRE, INJURY, OR DEATH 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.
!
WARNING
