F80CTL and G80CTL: 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.
38
* Orifice numbers 43 are factory installed
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 4 positions, see in Fig. 65, you must revise your orientation to
component location accordingly.
Electrical Controls and Wiring
The electrical ground and polarity for 115-v wiring must be properly
maintained. See Fig. 24 for field wiring information, and see Fig. 53 in
the Wiring Diagram section for furnace wiring information.
NOTE: If the polarity is not correct, the STATUS LED on the control
will flash status code 10 and prevent the furnace from heating. The
control system also requires an earth ground for proper operation of the
control and flame-sensing electrode.
The 24-v circuit contains an automotive-type, 3-amp. fuse located on the
control, see Fig. 32. Any shorts of the 24-v wiring during installation,
service, or maintenance will cause this fuse to blow. If fuse replacement
is required, use ONLY a 3-amp. fuse. The control LED will display turn
off when fuse needs to be replaced.
Proper instrumentation is required to service electrical controls. The
control in this furnace is equipped with a Status Code LED
(Light-Emitting Diode) to aid in installation, servicing, and
troubleshooting. Status codes can be viewed at the sight glass in blower
access door. The amber furnace control LED is either flashing a
heartbeat (bright-dim), on solid, or flash a status code.
For an explanation of status codes, refer to service label located on
blower access door (also on Fig. 49), and the troubleshooting guide
which can be obtained from your distributor.
See the brief Troubleshooting Guide, see Fig. 54.
For 2-Stage Variable Speed ECM Controls the stored status codes will
NOT be erased from the control memory, when 115- or 24-v power is
interrupted. The control will store up to the last 7 Status Codes in order
of occurrence.
1. To retrieve status codes, proceed with the following:
NOTE: NO thermostat signal may be present at control, and all
blower-OFF delays must be completed.
USA
9001 to
10,000
(2743 to
3048)
600 46 3.6/1.7 46 3.7/1.8 46 3.8/1.8 45 3.7/1.8
625 47 3.7/1.8 47 3.8/1.8 46 3.5/1.7 46 3.6/1.7
650 47 3.4/1.6 47 3.6/1.7 47 3.7/1.8 47 3.8/1.8
675 48 3.6/1.7 48 3.8/1.8 47 3.4/1.6 47 3.5/1.7
700 48 3.4/1.6 48 3.5/1.7 48 3.6/1.7 48 3.7/1.8
725 49 3.7/1.8 49 3.8/1.8 48 3.4/1.6 48 3.5/1.7
Table 16 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Tabulated Data Based on 21,000 Btuh High-Heat/14,500 Btuh
for Low-Heat Per Burner, Derated 4 Percent for Each 1000 Ft. (305 M) Above Sea level) (Continued)
ALTITUDE RANGE
FT. (M)
AVG. GAS HEAT
VALUE
(BTUH/CU FT.)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64
Orifice No.
Manifold
Pressure
High/Low
Manifold
Pressure
High/Low
Orifice No.
Orifice No.
Manifold
Pressure
High/Low
Orifice No.
Manifold
Pressure
High/Low
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.
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.
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.
WARNING
!
ELECTRICAL SHOCK 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.
To Next Page
Loading...
