Lennox International Inc MPB35ST-NM Maintenance Task Accomplishing Person Procedure, While HOT

2.Light appliance (follow lighting procedure on

lighting label in control compartment or see	Main Burner Factory Air Shutter			Decrease Shutter Opening		Note - Burners are
homeowners manual).	Opening Setting - All Models			In This Direction
						omitted in this
3. Allow the burner to operate for at least 15 min-
	Model	Natural	Propane			view for clarity.
utes while observing the flame continuously to
ensure that the proper flame appearance has		Gas	Gas
been achieved (see Figure 15). If the following		1/8”	1/4”
conditions are present, adjust accordingly.	MPB35ST				Orifice
		3.2mm	6.4mm
• If flame appears weak or sooty, adjust the
air shutter, incrementally, to a more open
position until the proper flame appearance
is achieved.
• If flame stays lowered blue, adjust the air		Adjustment Rod Positions		Air Shutter	Increase Shutter	Opening
shutter, incrementally, to a more closed	Figure 16			Adjusting
position until the proper flame appearance		(when viewed from above)		Rod	In This Direction
is achieved.

4.Leave the control knob (off/pilot/on) in the ON position and the burner OFF/ON switch OFF (& remote switches, if applicable).

5.When satisfied that the burner flame appearance is normal, close the lower control compartment door.

MAINTENANCE SCHEDULE - Annually (Before the onset of the Burning Season)

MAINTENANCE TASK	ACCOMPLISHING PERSON			PROCEDURE
Inspecting/Cleaning Burner, Logs	Qualified Service Technician		Inspect valve and ensure it is properly operating. Check piping
and Controls			for leaks. Vacuum the control compartment, fireplace logs and
			burner area.
Check Flame Patterns and Flame	Qualified Service Technician		Refer to Figure 15 on Page 13 and verify the flame pattern
Height			and height displayed by the appliance conforms to the picture.
			Flames must not impinge on the logs. Ensure flames are steady
			(not lifting or floating).
Inspecting/Cleaning Pilot and Burner	Qualified Service Technician		Refer to Figure 17 and Figure 18 on Page 14. Remove any
			surface build-up on pilot and burner assembly. Wipe the pilot
			nozzles, igniter/flame rod and hood. Ensure the pilot flame
			engulfs the flame sensor as shown.
Checking Vent System	Qualified Service Technician		Inspect the vent system at the top and at the base (within the
			firebox) for signs of blockage or obstruction. Look for any signs
			of dislocation or deterioration of the vent components. Note:
			Inspect wall straps or plumbers's tape to ensure it is secure
			and in place.
Appliance Checkout	Qualified Service Technician		Perform the appropriate appliance checkout procedure detailed
			in this manual.
Replacing Rockwool Ember Materials	Homeowner/Qualified Service		Remove old ember materials (rockwool) and vacuum the ember
	Technician		placement area. Place new embers as described in Step 6 on
			Page 11.
MAINTENANCE SCHEDULE - Periodically (After the Burning Season)
MAINTENANCE TASK	ACCOMPLISHING PERSON			PROCEDURE
Cleaning Firebox Interior	Homeowner		Carefully remove logs, embers (rockwool), and vermiculite.
			Vacuum out interior of the firebox. Clean firebox walls and
			log grate. Replace logs, embers (rockwool) and vermiculite as
			detailed in this manual (see Pagexs 8-10).
Check Flame Patterns and Flame	Homeowner		Refer to Figurex 15 on Pagex 10 and verify the flame pattern
Height			and height displayed by the appliance conforms to the picture.
			Flames must not impinge on the logs.
Checking Vent System	Homeowner		Inspect the vent system at the top and at the base (within the
			firebox) for signs of blockage or obstruction. Look for any signs
			of dislocation of the vent components.
Cleaning Front Glass Enclosure Panel	Homeowner		Clean as necessary following the directions provided in this
			manual. DO NOT TOUCH OR ATTEMPT TO CLEAN GLASS
			WHILE HOT.		11
		NOTE: DIAGRAMS & ILLUSTRATIONS	NOT TO SCALE.