59CU5A: Installation, Start-up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
54
Table 25 – Gas Valve Outlet Pressure for Gas Heat Values at
Altitude - 100,000
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.
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 3 positions (see
), you must revise your orientation to
component location accordingly.
(Tabulated Data Based on 100,000 BTUH Input for 0-ft (0m) to
5400-ft (1646 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
0.66
0.68
Manifold Pressure
900
2.7
2.8
2.9
3.0
3.1
3.1
0
925
2.6
2.7
2.7
2.8
2.9
3.0
(0)
950
2.4
2.5
2.6
2.7
2.8
2.9
975
2.3
2.4
2.5
2.6
2.6
2.7
to
1000
2.2
2.3
2.4
2.4
2.5
2.6
1025
2.1
2.2
2.2
2.3
2.4
2.5
2000
1050
2.0
2.1
2.1
2.2
2.3
2.3
(610)
1075
1.9
2.0
2.0
2.1
2.2
2.2
1100
1.8
1.9
1.9
2.0
2.1
2.1
800
2.9
3.0
3.1
3.1
3.1
3.1
2001
825
2.8
2.9
3.0
3.0
3.1
3.1
(611)
850
2.6
2.7
2.8
2.9
3.0
3.1
875
2.5
2.5
2.6
2.7
2.8
2.9
to
900
2.3
2.4
2.5
2.6
2.6
2.7
925
2.2
2.3
2.3
2.4
2.5
2.6
3000
950
2.1
2.2
2.2
2.3
2.4
2.4
(914)
975
2.0
2.0
2.1
2.2
2.3
2.3
1000
1.9
1.9
2.0
2.1
2.1
2.2
775
2.9
3.0
3.1
3.1
3.1
3.1
800
2.7
2.8
2.9
3.0
3.1
3.1
3001
825
2.6
2.6
2.7
2.8
2.9
3.0
(915)
850
2.4
2.5
2.6
2.7
2.7
2.8
to
875
2.3
2.3
2.4
2.5
2.6
2.7
900
2.1
2.2
2.3
2.4
2.4
2.5
4000
925
2.0
2.1
2.2
2.2
2.3
2.4
(1219)
950
1.9
2.0
2.1
2.1
2.2
2.3
975
1.8
1.9
2.0
2.0
2.1
2.1
1000
1.8
1.8
1.9
1.9
2.0
2.0
750
2.8
2.9
3.0
3.1
3.1
3.1
775
2.7
2.8
2.9
2.9
3.0
3.1
4001
800
2.5
2.6
2.7
2.8
2.8
2.9
(1220)
825
2.4
2.4
2.5
2.6
2.7
2.8
850
2.2
2.3
2.4
2.4
2.5
2.6
to
875
2.1
2.2
2.2
2.3
2.4
2.5
900
2.0
2.0
2.1
2.2
2.3
2.3
5000
925
1.9
1.9
2.0
2.1
2.1
2.2
(1524)
950
1.8
1.8
1.9
2.0
2.0
2.1
975
1.8
1.8
1.8
1.9
1.9
2.0
1000
1.8
1.8
1.8
1.8
1.8
1.9
725
2.8
2.9
3.0
3.1
3.1
3.1
750
2.7
2.8
2.8
2.9
3.0
3.1
5001
775
2.5
2.6
2.7
2.7
2.8
2.9
(1525)
800
2.3
2.4
2.5
2.6
2.7
2.7
825
2.2
2.3
2.3
2.4
2.5
2.6
to
850
2.1
2.1
2.2
2.3
2.4
2.4
875
2.0
2.0
2.1
2.2
2.2
2.3
900
1.8
1.9
2.0
2.0
2.1
2.2
5400
925
1.8
1.8
1.9
1.9
2.0
2.0
(1646)
950
1.8
1.8
1.8
1.8
1.9
1.9
975
1.8
1.8
1.8
1.8
1.8
1.8
1000
1.8
1.8
1.8
1.8
1.8
1.8
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 service and
maintenance on this equipment other than those procedures
recommended in the Owner’s Manual.
CAUTION
!
ENVIRONMENTAL HAZARD
Failure to follow this caution may result in environmental pollution.
Remove and recycle all components or materials (i.e. oil, refrigerant,
control board, etc.) before unit final disposal.
WARNING
!
ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal injury or death,
or property damage.
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. Always reinstall access doors after completing service and
maintenance.
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.
CAUTION
!
ENVIRONMENTAL HAZARD
Failure to follow this caution may result in environmental pollution.
Remove and recycle all components or materials (i.e. oil, refrigerant,
control board, etc.) before unit final disposal.
