Specifications are subject to change without notice.
34
441 01 7201 00
b. Insert the twisted wire end of brush into end of spring
cable, and crimp tight with crimping tool or crimp by
striking with ball- peen hammer. TIGHTNESS IS VERY
IMPORTANT.
IGNITER
POSTION
A180230
Fig. 36 - Igniter Position
(1.) Attach variable- speed, reversible drill to the end of
spring cable (end opposite brush).
(2.) Insert brush end of cable into the outlet opening of
cell and slowly rotate with drill. DO NOT force
cable. Gradually insert cable into upper pass of cell.
(See Fig. 37)
(3.) Work cable in and out of cell 3 or 4 times to obtain
sufficient cleaning. DO NOT pull cable with great
force. Reverse drill and gradually work cable out.
(4.) Insert brush end of cable in burner inlet opening of
cell, and proceed to clean two lower passes of cell
in same manner as upper pass.
(5.) Repeat foregoing procedures until each cell in
furnace has been cleaned.
(6.) Using vacuum cleaner, remove residue from each
cell.
(7.) Using vacuum cleaner with soft brush attachment,
clean burner assembly.
(8.) Clean flame sensor with fine steel wool.
(9.) Reinstall the insulation assembly.
NOTE
: If insulation assembly is damaged, do not attempt to
repair, must be replaced with insulation kit.
NOTE
: Proper use of Personal Protective Equipment (PPE)
must be followed, including safety glasses, gloves, and dust mask
when removing and reinstalling the heat exchanger insulation
assembly.
(10.) Reinstall burner assembly.
10. Remove old sealant from cell panel and collector box
flange.
11. Spray releasing agent on the heat exchanger cell panel
where inducer cover assembly contacts cell panel.
NOTE
: A releasing agent such as cooking spray or equivalent
(must not contain corn or canola oil, aromatic or halogenated
hydrocarbons or inadequate seal may occur) and RTV sealant
(G.E. 162, 6702, or Dow- Corning 738) are needed before
starting installation.
NOTE
: DO NOT substitute any other type of RTV sealant.
12. Apply new sealant to flange of collector box and attach to
cell panel using existing screws, making sure all screws
are secure.
13. Reconnect wires to the following components. (Use
connection diagram on wiring label, if wires were not
marked for reconnection locations.):
a. Burner thermal switch
b. Inducer motor
c. Transducer
d. Limit over- temperature switch
e. Gas valve
f. Hot surface igniter
g. Flame- sensing electrode
14. Reinstall vent connector on furnace vent elbow. Securely
fasten vent connector to vent elbow with two (2)
field- supplied, corrosion- resistant, sheet metal screws
located 180
_
apart.
15. Replace blower access door only, if it was removed.
16. Set thermostat above room temperature and check furnace
for proper operation.
17. Verify blower airflow and speed changes between heating
and cooling.
18. Check for gas leaks.
19. Replace outer access door.
A180229
Fig. 37 - Cleaning Heat Exchanger Cell
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal injury,
death and/or property damage.
Never purge a gas line into a combustion chamber. Never
test for gas leaks with an open flame. Use a commercially
available soap solution made specifically for the detection of
leaks to check all connections.
!
WARNING
SEQUENCE OF OPERATION
NOTE
: Furnace control must be grounded for proper operation
or control will lock out. Control is grounded through
green/yellow wire routed to gas valve and gas valve mounting
bracket screw.
Follow the sequence of operation through the different modes.
Read and follow the wiring diagram very carefully.
The blower door must be installed for power to be conducted
through the blower door interlock switch ILK to the furnace
control CPU, transformer TRAN, inducer motor IDM, blower
motor BLWM, hot- surface igniter HSI, and gas valve GV.
