ICP F9MES Series, Service And Technical Support Manual

SERVICE AND TECHNICAL SUPPORT MANUAL

Gas Furnace: F9MES

Specifications  subject to change without notice.

18

440 04 4900 02

5. Insert the orifices in the support rings of the burners.

NOTE

:  If manifold does not fit flush against the burner, do not

force the manifold on the burner assembly. The burners are not
fully seated forward in the burner assembly. Remove the

manifold and check burner positioning in the burner assembly
assembly before re-installing the manifold.

6. Attach the green/yellow wire and ground terminal to one

of the manifold mounting screws.

7. Install the remaining manifold mounting screws.
8. Check the igniter alignment. See 

Figure 9

, 

Figure 10

and 

Figure 11

.

Figure 10

Igniter Position 

−

 Top View

A11405

2-1/2-in.

(64.4)

1-1/4-in.

(31.8)

Figure 11

Igniter Position 

−

 Side View

A12392

2

−

in.

(2.5 mm

3/8

−

in.

3/16

−

in.

, +0.8 -1.5)

(50 mm)

(9.6 mm)

(4.6 mm)

3/32

−

in., +1/32 -3/64-in.

9. Attach the wires to the roll-out switches.

10. Align the burner  assembly with the openings in the

primary cell inlet panel and attach the burner assembly to

the cell panel.

11. Connect the wire for the flame sensor.

12. Connect the wire for the Hot Surface Igniter.

NOTE

:  Use propane-resistant pipe dope to prevent leaks. Do

not use Teflon tape.

13. Install the gas pipe to the gas valve.

!

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.

14. Check for gas leaks with a commercially available soap

solution made specifically for the detection of leaks.

15. Turn gas on at electric switch on gas valve and at

external shut-off or meter

16. Turn power on at external disconnect, fuse or circuit

breaker.

17. Run the furnace through two complete heating cycles to

check for proper operation

18. Install control door when complete.

Servicing Hot Surface Igniter

The igniter does 

NOT 

require annual inspection. Check igniter

resistance before removal.  Refer to 

Figure 9

, 

Figure 10

 and

Figure 11

.

1. Turn off gas and electrical supplies to furnace.
2. Remove control door.
3. Disconnect igniter wire connection.
4. Check igniter resistance. Igniter resistance is affected by

temperature. Only check resistance when the igniter is at

room temperature.
a. Using an ohm meter, check resistance across both

igniter leads in connector.

b. Cold reading should be between 40 ohms and 70

ohms.

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 

Figure 9

)

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 

Figure 9

)

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

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.

!

WARNING

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.

4. Remove the collector box plug from the top port on the

upper corner of the collector box. (See 

Figure 1

)

5. Attach a funnel with a flexible tube to port on the collector

box.