Dealer Maintenance; Heat Exchanger Cleaning Instructions - Thermo Products VH8FA119P60B Installation And Operation Manual

IV. DEALER MAINTENANCE:
SAFETY DURING SERVICING AND INSPECTION
: Personal injury or property damage could result from repair or service of this
appliance by anyone other than a qualified heating contractor. The user may only perform the
activities described in the Homeowner/User Routine Maintenance section of this manual.
: To avoid injury from moving parts, or electrical shock, shut off the power to the
appliance before removing blower compartment door and servicing this appliance.
: When servicing controls, label all wires prior to disconnecting. Reconnect any
removed wires correctly. Wiring errors can cause improper and dangerous operation.
Dangerous operation can result in injury or damage.
IMPORTANT: Verify the proper operation of this appliance after any servicing is performed.
A qualified heating contractor should perform the following maintenance procedures at the
beginning of each heating season. Correct any deficiencies at once.
A. HEAT EXCHANGER CLEANING INSTRUCTIONS:
WARNING: THE HEAT EXCHANGER MUST BE CLEANED BY A QUALIFIED
SERVICE PERSON.
It is important to inspect and clean the heat exchanger once a year, or as necessary, to remove any build-
up of soot. A layer of soot on the inside of the heat exchanger will act as an insulator and reduce heat
transfer, resulting in less efficiency.
1. To clean the heat exchanger, first turn off all power to the unit. Remove clean-out plugs, the vent
connector pipe to the chimney, the burner, and the burner mounting plates. When removing the clean-out
plugs, remove the screw at the 12 o'clock position. Then, pull clean-out plug straight back.
2. With access to the inside of the heat exchanger through the burner area, clean-out openings, and vent
pipe connection, it is possible to use a long, flexible wire brush and an industrial type vacuum cleaner to
remove any soot build-up. NOTE: A one inch (outside diameter) vacuum cleaner hose will fit into the
radiator.
To vacuum and brush the outer radiator of the heat exchanger, go through the clean-out openings in both
directions, as shown in figure 18 on the next page.
3. Reassemble the furnace to its original construction*. Remount the burner being certain that the air
tube is properly inserted into the chamber opening. If heavy soot deposits were found in the heat
exchanger, this may indicate the burner is out of adjustment.
*When returning clean-out plugs to their original position, insert plug and replace screw at the 12 o'clock
position. This is sufficient for sealing the access tube.
Replace any damaged or corroded components. All gaskets and insulation must
be inspected, and replaced, if they show any signs of damage.
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