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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 (0 M)
to 5400---ft (1646 M)
AVG. GAS
0.58
ALTITUDE
HEAT
VALUE AT
RANGE
ft (m)
ALTITUDE
(Btu/cu ft)
900
0
925
(0)
950
975
to
1000
1025
2000
1050
(610)
1075
1100
800
2001
825
(611)
850
875
to
900
925
3000
950
(914)
975
1000
775
800
3001
825
(915)
850
to
875
900
4000
925
(1219)
950
975
1000
750
775
4001
800
(1220)
825
850
to
875
900
5000
925
(1524)
950
975
1000
725
750
5001
775
(1524)
800
825
to
850
875
5400
900
(1646)
925
950
975
1000
above sea level
0.60
0.62
0.64
Manifold Pressure (in. W.C.)
3.3
3.4
3.5
3.6
3.1
3.2
3.3
3.4
2.9
3.0
3.1
3.2
2.8
2.9
3.0
3.1
2.6
2.7
2.8
2.9
2.5
2.6
2.7
2.8
2.4
2.5
2.6
2.6
2.3
2.4
2.4
2.5
2.2
2.3
2.3
2.4
3.5
3.7
3.8
3.9
3.3
3.4
3.6
3.7
3.1
3.2
3.3
3.5
3.0
3.1
3.2
3.3
2.8
2.9
3.0
3.1
2.6
2.7
2.8
2.9
2.5
2.6
2.7
2.8
2.4
2.5
2.5
2.6
2.3
2.3
2.4
2.5
3.5
3.6
3.7
3.8
3.3
3.4
3.5
3.6
3.1
3.2
3.3
3.4
2.9
3.0
3.1
3.2
2.7
2.8
2.9
3.0
2.6
2.7
2.8
2.8
2.4
2.5
2.6
2.7
2.3
2.4
2.5
2.6
2.2
2.3
2.3
2.4
2.1
2.2
2.2
2.3
3.4
3.5
3.7
3.8
3.2
3.3
3.4
3.5
3.0
3.1
3.2
3.3
2.8
2.9
3.0
3.1
2.7
2.8
2.9
2.9
2.5
2.6
2.7
2.8
2.4
2.5
2.5
2.6
2.3
2.3
2.4
2.5
2.1
2.2
2.3
2.4
2.0
2.1
2.2
2.2
1.9
2.0
2.1
2.1
3.4
3.6
3.7
3.8
3.2
3.3
3.4
3.6
3.0
3.1
3.2
3.3
2.8
2.9
3.0
3.1
2.6
2.7
2.8
2.9
2.5
2.6
2.7
2.8
2.4
2.4
2.5
2.6
2.2
2.3
2.4
2.5
2.1
2.2
2.2
2.3
2.0
2.1
2.1
2.2
1.9
1.9
2.0
2.1
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.
WARNING
!
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.
disconnect switch. Lock out and tag switch with a suitable
warning label. Verify proper operation after servicing.
CAUTION
!
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.
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
WARNING
!
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.
29
There may be more than one
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