Carrier 140/E Series Installation, Start--Up, Operating, And Service And Maintenance page 49

striking with ball-peen hammer. TIGHTNESS ISVERY
IMPORTANT.
NOTE: The materials needed initem 9can usually bepurchased
atlocal hardware stores.
(1.)Attach variable-speed, reversible drill t othe end of
spring cable ( end opposite brush).
(2.)Insert brush end ofcable intothe outlet opening of
cell a nd slowly rotate w ithdrill.DONOT force
cable. Gradually insert cable into upper pass ofcell.
(See F ig. 5 5.)
(3.)Work c able inand o ut o fcell 3or4times t oobtain
sufficient cleaning. DO NOT pull c able w ith great
force. Reverse drill a nd gradually work cable o ut.
(4.)Insert brush end ofcable inburner inlet opening of
cell, a nd proceed toclean 2 lower passes ofcell i n
same manner as upper pass.
(5.)Repeat foregoing procedures until e ach cell i nfur-
nace has b een c leaned.
(6.)Using v acuum c leaner, remove residue from each
cell.
(7.)Using v acuum c leaner withsoft b rush a ttachment,
clean burner assembly.
(8.)Clean flame s ensor with fine steel wool.
(9.)Install NOx baffles (ifremoved.)
(10.) R einstall burner assembly. Center burners incell
openings.
10. R emove oldsealant fromcellpanel andcollector box
flange.
11. S pray r eleasing agent ontheheat e xchanger cellpanel
where collector box assembly contacts cell p anel.
NOTE:A releasing agent such a s cooking spray orequivalent
(must notcontain corn orcanola o il,aromatic or halogenated
hydrocarbons orinadequate seal may occur) and RTVsealant
(G.E. 1 62, 6 702, o r Dow-Corning 738)areneeded before
starting installation. DONOT substitute any other type ofRTV
sealant. G.E. 162 (P771-9003) isavailable through RCD in3-oz.
tubes.
12. A pply n ew sealant toflange o fcollector box and attach to
cell p anel using e xisting screws, making sure allscrews
are secure.
13. R econnect wires t othe following components
(Use
con-
nection diagram on wiring label, if wires were not marked
for reconnection locations.):
a. Draft safeguard switch.
b. Inducer motor.
c. Pressure switches.
d. Limit overtemperature switch.
e. Gas valve.
f. Hot surface igniter.
g. Flame-sensing electrode.
h. Flame rollout switches.
14. Reinstall internal vent pipe, if applicable.
15. Reinstall vent connector on furnace vent elbow. Securely
fasten vent connector to vent elbow with 2 field-supplied,
corrosion-resistant, sheet metal screws located 180 ° apart.
f
1-7/8
O (47'imm)
A05026
Fig. 54 - Igniter Position-Top View
A91252
Fig. 55 - Cleaning Heat Exchanger Cell
16. Replace blower access door only, if it was removed.
17. Set thermostat above room temperature and check furnace
for proper operation.
18. Verify blower airflow and speed changes between heating
and cooling.
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal
iniury death and/or property damage.
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 connects.
19. Check for gas leaks.
20. Replace outer access door.
Step 3 -- Sequence of Operation
NOTE: Furnace control must be grounded for proper operation
or control will lockout. Control is grounded through green wire
connected to gas valve and burner bracket screw. Using the
schematic diagram in Fig. 52, follow the sequence of operation
through the different modes. Read and follow the wiring diagram
very carefully.
NOTE: If a power interruption occurs during a call for heat
(W/W1 or W/Wl-and-W2), the control run the blower for the
selected blower off-delay period two seconds after power is
restored and if the thermostat is still calling for gas heating. The
LED light will flash code 12 during this period, after which the
LED will be ON continuous, as long as no faults are detected.
After this period, the furnace will respond to the thermostat
normally.
The blower door must be installed for power to be conducted
through the blower door interlock switch ILK to the furnace
49