h. Blower will run for 90 seconds before beginning the call
for heat again.
i. Furnace should ignite normally.
Step 5—Checklist
1. Put away tools and instruments. Clean up debris.
2. Check that blower OFF-DELAY time is selected as desired.
a. Verify that switches SW1-1 and SW1-6 are OFF and other
setup switches are set as desired. Verify that switches
SW1-7 and SW1-8 for the blower OFF DELAY are set as
desired.
3. Verify that blower and burner access doors are properly
installed.
4. Cycle test furnace with room thermostat.
5. Check operation of accessories per manufacturer’s instruc-
tions.
6. Review User’s Guide with owner.
7. Attach literature packet to furnace.
SERVICE AND MAINTENANCE PROCEDURES
The ability to properly perform maintenance on this equip-
ment 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. FAILURE
TO FOLLOW THIS WARNING COULD RESULT IN
POSSIBLE DAMAGE TO THIS EQUIPMENT, SERIOUS
PERSONAL INJURY, OR DEATH.
ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly, could result in
dangerous operation, serious injury, death or property dam-
age.
Improper servicing could result in dangerous operation,
serious injury, death or property damage.
-Before servicing, disconnect all electrical power to furnace.
-When servicing controls, label all wires prior to
disconnecting. Reconnect wires correctly.
-Verify proper operation after servicing.
Label all wires prior to disconnection when servicing con-
trols. Wiring errors can cause improper and dangerous
operation.
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 Fig. 4,
you must revise your orientation to component location accord-
ingly.
ELECTRICAL CONTROLS AND WIRING
There may be more than 1 electrical supply to the unit. Check
accessories and cooling unit for additional electrical supplies.
The electrical ground and polarity for 115-v wiring must be
properly maintained. Refer to Fig. 22 for field wiring information
and to Fig. 51 for furnace wiring information.
TABLE 11–(Tabulated Data Based On 21,000 Btuh High-Heat/14,500 Btuh for Low-Heat Per Burner,
Derated 4 Percent For Each 1000 Ft Above Sea Level)
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58
0.60
0.62
0.64
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A.
Only
9001
to
10,000
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
* Orifice numbers 43 are factory installed
Fig. 49—Amp Draw Check With Ammeter
A96316
R
Y W G
10 TURNS
THERMOSTAT SUBBASE
TERMINALS WITH
THERMOSTAT REMOVED
(ANITICIPATOR, CLOCK, ETC.,
MUST BE OUT OF CIRCUIT.)
HOOK-AROUND
AMMETER
EXAMPLE:
5.0 AMPS ON AMMETER
10 TURNS AROUND JAWS
=
0.5 AMPS FOR THERMOSTAT
ANTICIPATOR SETTING
FROM UNIT 24-V
CONTROL TERMINALS
37