ICP F9MES Series, Service And Technical Support Manual

SERVICE AND TECHNICAL SUPPORT MANUAL

Gas Furnace: F9MES

Specifications  subject to change without notice.

4

440 04 4900 02

START

−

UP, ADJUSTMENT, AND SAFETY

CHECK

NOTICE

IMPORTANT INSTALLATION AND START

−

UP

PROCEDURES

Failure to follow this procedure may result in a nuisance smoke

or odor complaint.

The manifold pressure, gas rate by meter clocking, temperature

rise and operation must be checked after installation. Minor

smoke and odor may be present temporarily after start

−

up from

the manufacturing process. Some occupants are more

sensitive to this minor smoke and odor. It is recommended that

doors and windows be open during the first heat cycle.

General

1. Furnace must have a 220

−

V 50Hz power supply properly

connected and grounded.

NOTE

:  Proper polarity must be maintained for 220

−

V 50Hz

wiring. Control status indicator light flashes code 10 and

furnace does not operate if polarity is incorrect or if the furnace

is not grounded.

2. Thermostat wire connections at terminals R, W, G, and Y

must be made at 24-v terminal block on furnace control.

3. Natural gas service pressure must not exceed 0.5 psig

(14- in. w.c., 1125 Pa), but must be no less than 0.16

psig (4.5-in. w.c., 350 Pa).

4. Blower door must be in place to complete 220

−

V 50Hz

electrical circuit and supply power to the furnace

components.

UNIT OPERATION HAZARD

Failure to follow this caution may result in intermittent unit

operation or performance satisfaction.

These furnaces are equipped with a manual reset limit

switch in burner assembly.  This switch opens and shuts off

power to the gas valve if an overheat condition (flame

rollout) occurs in the burner assembly/enclosure.  Correct

inadequate combustion

−

air supply, improper gas pressure

setting, improper burner or gas orifice positioning, or

improper venting condition before resetting switch.  DO

NOT jumper this switch.

CAUTION

!

Before operating furnace, check flame rollout manual reset

switch for continuity. If necessary, press button to reset switch.
EAC

−

1 (220vac) terminal is energized whenever blower

operates. HUM (220vac) terminal is only energized when the

draft inducer is energized in heating.
HUM (24vac) terminal is only energized on a call for heat (W)

and the LPS is closed.

Prime Condensate Trap with Water

CARBON MONOXIDE POISONING HAZARD

Failure to follow these warnings could result in personal

injury or death.
Failure to use a properly configured trap or NOT

water-priming trap before operating furnace may allow

positive pressure vent gases to enter the structure through

drain tube. Vent gases contain carbon monoxide which is

tasteless and odorless.

!

WARNING

1. Remove upper and middle collector box drain plugs

opposite of the condensate trap.   (See 

Figure 1

)

2. Connect field-supplied 5/8-in. (16 mm) ID tube with

attached funnel (see 

Figure 1

) to upper collector box

drain connection.

3. Pour one quart (liter) of water into funnel/tube. Water

should run through collector box, overfill condensate

trap, and flow into open field drain.

4. Remove funnel; replace collector box drain plug.
5. Connect field-supplied 5/8-in. (16 mm) ID tube to middle

collector box drain port.

6. Pour one quart (liter) of water into funnel/tube. Water

should run through collector box, overfill condensate

trap, and flow into open field drain.

7. Remove funnel and tube from collector box and replace

collector box drain plug.

Figure 1

Priming Condensate Drain

L11F065

Representative drawing only, some models may vary in appearance.

Purge Gas Lines

If not previously done, purge the lines after all connections

have been made and check for leaks.

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.

!

WARNING

Adjustments

FIRE HAZARD

Failure to follow this warning could result in personal injury,

death and/or property damage.
DO NOT bottom out gas valve regulator adjusting screw.

This can result in unregulated manifold pressure and result

in excess overfire and heat exchanger failures.

!

WARNING