35
Table 17 – Gas Valve Outlet Pressure for Gas Heat Values at
Altitude -- 100,000
(Tabulated Data Based on 100,000 BTUH Input, for 0-ft (0-m)
to 5400-ft (1646-M) above sea level)
ALTITUDE
RANGE
AVG. GAS
SPECIFIC GRAVITY OF
NATURAL GAS
HEAT VALUE
0.58
0.60
0.62
0.64
AT ALTITUDE
Gas Valve Outlet Pressure
(in. W.C.)
ft (m)
(Btu/cu ft)
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
3.9
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
U.
S
.A.
On
ly
725
3.4
3.6
3.7
3.8
750
3.2
3.3
3.4
3.6
5001
775
3.0
3.1
3.2
3.3
(1524)
800
2.8
2.9
3.0
3.1
825
2.6
2.7
2.8
2.9
to
850
2.5
2.6
2.7
2.8
875
2.4
2.4
2.5
2.6
5400
900
2.2
2.3
2.4
2.5
(1646)
925
2.1
2.2
2.2
2.3
950
2.0
2.1
2.1
2.2
975
1.9
1.9
2.0
2.1
1000
1.8
1.9
1.9
2.0
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
!
INTRODUCTION
GENERAL
These instructions are written as if the furnace is installed in an
upflow application. An upflow furnace application is where the
blower is located below the combustion and controls section of
the furnace, and conditioned air is discharged upward. Since this
furnace can be installed in any of the 4 positions shown in Fig. 4,
you must revise your orientation to component location
accordingly.
ELECTRICAL CONTROLS AND WIRING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
There may be more than one electrical supply to the
furnace. Check accessories and cooling unit for additional
electrical supplies that must be shut off during furnace
servicing. Lock out and tag switch with a suitable warning
label.
!
WARNING
The electrical ground and polarity for 115--v wiring must be
properly maintained. Refer to Fig. 24 for field wiring information
and to Fig. 45 for furnace wiring information.
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