40
441 01 2101 05
Specifications are subject to change without notice.
Table 16
−
Orifice Size* and Manifold Pressures (in. w.c.) for Gas Input Rate (cont.)
A10185A
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, PERSONAL INJURY AND UNIT DAMAGE
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
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.
CAUTION
!
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
UNIT OPERATION HAZARD
Failure to follow this caution may result in improper unit
operation or failure of unit components.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation.
CAUTION
!
Step 1 — 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 Figure 4, you must revise your orientation
to component location accordingly.