Carrier N92ESN Installation, Start-Up, Operating And Service And Maintenance Instructions page 59

N92ESN: Installation, Start-up, Operating and Service and Maintenance Instructions
WARNING
!
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. A
fire or explosion may result causing property damage, personal injury
or loss of life.
Fig. 68 – Igniter Position - Side View
5. Remove igniter assembly.
a. Using a 1/4-in. driver, remove the two screws securing the igniter
mounting bracket to the burner assembly See
b. Carefully withdraw the igniter and bracket assembly through the
front of the burner assembly without striking the igniter on
surrounding parts.
c. Inspect igniter for signs of damage or failure.
d. If replacement is required, remove the screw that secures the
igniter on igniter bracket and remove the igniter.
6. To replace igniter and bracket assembly, reverse items 5a through
5d.
7. Reconnect igniter harness to the igniter, dressing the igniter wires to
ensure there is no tension on the igniter itself. See
8. Turn on gas and electrical supplies to furnace.
9. Verify igniter operation by initiating control board self-test feature
or by cycling thermostat.
10. Replace control door.
Flushing Collector Box and Drainage System
WARNING
!
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning could result in personal injury, death,
and/or property damage.
Turn off the gas and electrical supplies to the furnace and install lockout
tag before performing any maintenance or service. Follow the operating
instructions on the label attached to the furnace.
1. Turn off gas and electrical supplies to furnace.
2. Remove control door.
3. Disconnect pressure switch tube from pressure switch port.
NOTE: Ensure the pressure switch tube disconnected from the pressure
switch is higher than the collector box opening or water will flow out of
tube.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
4. Remove the collector box plug from the top port on the upper
corner of the collector box. See
5. Attach a funnel with a flexible tube to port on the collector box.
6. Flush inside of collector box with water until discharge water from
condensate trap is clean and runs freely.
7. Repeat steps 4 threw 6 with middle plug on upper corner of
collector box.
8. Remove the pressure switch tube from the collector box.
NOTE: Do NOT blow into tube with tube connected to the pressure
switch.
9. Clean pressure switch port on collect box with a small wire. Shake
any water out of pressure switch tube.
10. Reconnect tube to pressure switch and pressure switch port.
11. Remove the relief tube from the port on the collector box and the
trap.
12. Clean the relief port on collect box and the trap with a small wire.
Shake any water out of the tube.
13. Reconnect relief tube to trap and collector box ports.
Cleaning Condensate Drain and Trap
NOTE: If the condensate trap is removed, a new gasket between the trap
and collector box is required. Verify a condensate trap gasket is included
in the service kit or obtain one from your local distributor.
1. Disconnect power at external disconnect, fuse or circuit breaker.
2. Turn off gas at external shut-off or gas meter.
3. Remove control door and set aside.
L12F041
4. Turn electric switch on gas valve to OFF.
5. Disconnect external drain from condensate drain elbow or drain
extension pipe inside the furnace and set aside.
Fig. 66.
6. Disconnect the condensate trap relief hose from collector box port
and condensate trap.
NOTE: If condensate has a heat pad attached to the trap, trace the wires
for the pad back to the connection point and disconnect the wires for the
heat pad.
7. Remove the screw that secures the condensate trap to the collector
box, remove the trap and set aside.
8. Remove the trap gasket from the collector box if it did not come off
when the trap was removed.
Fig. 66.
9. Discard the old trap gasket.
10. Rinse condensate trap in warm water until trap is clean.
11. Flush condensate drain lines with warm water. Remember to check
and clean the relief port on the collector box.
12. Shake trap dry.
13. Clean port on collector box with a small wire.
To re-install Condensate Drain and Trap:
1. Remove adhesive backing from condensate trap gasket
2. Install gasket on collector box
3. Align the condensate trap with the drain opening on the collector
box and secure the trap with the screw
4. Attach the relief hose to the relief port on the condensate trap and
collector box.
5. Secure tubing to prevent any sags or traps in the tubing.
6. Connect condensate drain elbow or drain extension elbow to the
condensate trap
7. Connect the leads of the condensate heat pad (if used)
8. Connect external drain piping to the condensate drain elbow or
drain extension pipe.
9. Turn gas on at electric switch on gas valve and at external shut-off
or meter
59
Fig. 59.