BURNER FLAME
BURNER
58MEC | MANIFOLD | |
A89020 | ||
| ||
| Fig. 11 - Burner Flame | |
|
|
PAM
RTV
A93081
Fig. 12 - Gasket on Collector Box
Step 6 — Servicing Hot Surface Igniter
The igniter does NOT require annual inspection. Check igniter resistance before removal.
1.Turn off gas and electrical supplies to furnace.
2.Remove main furnace door.
3.Disconnect igniter wire connection.
4.Check igniter resistance. Igniter resistance is affect by tem- perature. Only check resistance when the igniter is at room temperature.
d.Using an ohm meter, check resistance across both ig- niter leads in connector.
e.Cold reading should be between 40 ohms and 70 ohms.
5.Remove igniter assembly.
!CAUTION
BURN HAZARD
Failure to follow this caution may result in personal injury.
Allow igniter to cool before removal. Normal operating temperatures exceed 2000°F (1093°C).
a.Remove burner box cover.
b.Remove igniter wires from slot in manifold grommet. (See Fig. 7.)
c.Using a 1/4 in. driver, remove the single screw securing the igniter bracket to the burner box bracket (See Fig. 13.) and carefully withdraw the igniter and bracket as- sembly through the front of the burner box without striking the igniter on surrounding parts. Note that the igniter bracket has a handle that extends to the front of the burner box to aid in handling (See Fig. 13.).
d.Inspect igniter for signs of damage or failure.
!CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in unit component damage.
The igniter is fragile. DO NOT allow it to hit the side of the burner box parts while removing or replacing it.
e.If replacement is required, replace igniter on igniter bracket and then install assembly to burner box to avoid damage to the igniter.
6.To replace igniter and bracket assembly, reverse items 5a through 5d.
7.Reconnect igniter wire connection and insert the igniter wires in the slot in the manifold grommet, dressing the ig- niter wires to ensure there is no tension on the igniter itself. (See Fig. 7.)
!CAUTION
UNIT COMPONENT ELECTRICAL SHORT HAZARD
Failure to follow this caution may result in unit component damage.
Igniter wires must be securely placed in slot in manifold grommet or else they could become pinched or severed and electrically shorted.
8.Reinstall burner box cover.
9.Turn on gas and electrical supplies to furnace.
10.Verify igniter operation by initiating furnace control board
11.Replace main furnace door.
10
