Specifications are subject to change without notice.
30
441 01 7201 00
Table 11 – Gas Valve Outlet Pressure for Gas Heat Values at
Altitude - 40,000
(Tabulated Data Based on 40,000 BTUH Input for 0-ft (0m) to
2000-ft (1524 M) above sea level)
ALTITUDE
RANGE
ft (m)
AVG. GAS
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
3.0
3.1
3.2
3.3
0
925
2.8
2.9
3.0
3.1
(0)
950
2.7
2.8
2.9
3.0
975
2.6
2.6
2.7
2.8
to
1000
2.4
2.5
2.6
2.7
1025
2.3
2.4
2.5
2.5
2000
1050
2.2
2.3
2.4
2.4
(610)
1075
2.1
2.2
2.2
2.3
1100
2.0
2.1
2.1
2.2
Table 12 – Gas Valve Outlet Pressure for Gas Heat Values at
Altitude - 60,000
(Tabulated Data Based on 60,000 BTUH Input for 0-ft (0m) to
2000-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
2.7
2.8
2.9
2.9
0
925
2.5
2.6
2.7
2.8
(0)
950
2.4
2.5
2.6
2.6
975
2.3
2.3
2.4
2.5
to
1000
2.2
2.2
2.3
2.4
1025
2.0
2.1
2.2
2.3
2000
1050
1.9
2.0
2.1
2.2
(610)
1075
1.9
1.9
2.0
2.1
1100
1.8
1.8
1.9
2.0
Table 13 – 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
2000-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
Table 14 – 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
2000-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
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
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position and
install a lockout tag.
There may be more than one
disconnect switch. Lock out and tag switch with a suitable
warning label. Verify proper operation after servicing.
!
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this caution may result in improper
furnace operation or failure of furnace.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation.
CAUTION
!
